Saturday, February 28, 2015

LG FLATRON 194WT SERVICE MODE AND POWER SUPPLY CIRCUIT

LG FLATRON 194WT

LCD MONITOR 


SERVICE MODE AND POWER SUPPLY CIRCUIT 

SERVICE MODE
1) Turn off the power switch at the right side of the display.
2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval.
3) The SVC OSD menu contains additional menus that the User OSD menu as described below.
a) CLEAR ETI : To initialize using time.
c) Auto Color : W/B balance and Automatically sets the gain and offset value.
(press key for over 3 sec)
d) AGING : Select Aging mode(on/off).
b) Module : To select applied module.
d) NVRAM INIT : EEPROM initialize.(24C16, press key for over 3 sec)
e) R/G/B-9300K : Allows you to set the R/G/B-9300K value manually.
f) R/G/B-6500K : Allows you to set the R/G/B-6500K value manually.
g) R/G/B-Offset : Allows you to set the R/G/B-Offset value manually.(Analog Only)
h) R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only)
BLOCK DIAGRAM

1. EMI components.
This part contains of EMI components to comply with global marketing EMI standards like FCC,VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse.
2. Input rectifier and filter.
This part function is for transfer the input AC voltage to a DC voltage through a bridge rectifier and a bulk capacitor.
3. Energy Transfer.
This part function is for transfer the primary energy to secondary through a power transformer.
4. Output rectifier and filter.
This part function is to make a pulse width modulation control and to provide the driver signal to power switch, to adjust the duty cycle during different AC input and output loading condition to achieve the dc output stabilized, and also the over power protection is also monitor by this part.
5. Photo-Coupler isolation.
This part function is to feed back the DC output changing status through a photo transistor to primary controller to achieve the stabilized DC output voltage.
6. Signal collection.
This part function is to collect the any change from the DC output and feed back to the primary through photo transistor.
POWER SUPPLY CIRCUIT 
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SYLVANIA LC370SS8 SERVICE MODE RESETTING AND POWER SUPPLY CIRCUIT

SYLVANIA BLU RAY

SYLVANIA LC370SS8

LCD TV


SERVICE MODE RESETTING  AND POWER SUPPLY CIRCUIT  

How to initialize the LCD television:
1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit
- To cancel the service mode, press [POWER] button on the remote control unit.
3. Press [INFO] button on the remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is complete.
SERVICE MODE
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit.
How to make the Service remote control unit:
Cut “A” portion of the attached remote control unit as shown in Fig.


Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the service remote control unit.
VCOM Adjustment
*This adjustment is required when reparing T-CON CBA.
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the remote control unit.
5. Press [CH UP / DOWN] buttons on the remote control unit so that the color analyzer value becomes minimum.
White Balance Adjustment
*This adjustment is required when reparing T-CON CBA.
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL. DOWN] button on the remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [3] button to select “COB” for Blue Cutoff adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.
[DRIVE]
Press [6] button to select “DB” for Blue Drive adjustment. Press [4] button to select “DR” for Red Drive adjustment.
6. In each color mode, press [CH UP / DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 12000K (x= 0.272 / y= 0.278 ±0.005).
POWER SUPPLY CIRCUIT 
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BACK LIGHT INVERTER CIRCUIT 
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Friday, February 27, 2015

HITACHI 42PD4200 SERVICE MODE INITIALIZATION AND RESET

HITACHI 42PD4200


SERVICE MODE INITIALIZATION AND RESET 

How to get to Adjustment mode (SERVICE MODE )
Using the front control buttons with the set turned off (standby) can activate it.
Press the SUB-POWER button, INPUT SELECT button and DOWN ARROW button at the same time, and hold for more than 5 seconds.
The set turns on in adjustment mode with OSD.
Changing data and Selecting Adjustment code .When the set is in adjustment mode, the cursor LEFT ,RIGHT ,UP ,DOWN and OK buttons of the remote control or front panel may be used as the adjustment keys. UP,DOWN buttons are used for selecting adjustment code. LEFT,RIGHT buttons are used for changing data values. OK button is used for confirming the data. After finishing the necessary adjustment press MENU button. Adjustment mode is released and the set returns to normal condition.
Memory Initialize operation
NOTE: The execution of this function returns the adjustment codes to the preset values, therefore, adjustment data will be lost.
Procedure
(1) Enter Adjustment Mode.
(2) Select MEMORY INIT adjustment code (No.744) and change the data value from 0 to 1.
(3) Activate MEMORY INIT by pressing OK button for more than 3 seconds.
(4) Select No.374 and change data value from 1 to 0.
(5) Check that the receiving channel goes to AV1. Unit is set to preset values.
Self-Diagnosis Function
PDP panel self-diagnosis function.
Signal circuit self-diagnosis function
This function is for the failure of the signal circuit, for example the phenomenon as below: "Sometimes power turns off abnormally." "Sometimes picture disappears abnormally."
To enter to this Self-Diagnosis mode, follow the next steps:
Preparation:
1) The Power Cord should be connected to AC line and the Main Power switch should be turned on.
2) Turn the power off by the SUB-POWER button of the monitor or the remote control.
Procedure:
1) Press the SUB-POWER button and UP ARROW button on the bottom of the monitor at the same time, and keep it for more than 5 seconds after the power turned on.
2) The monitor will be turned on, and it will display On-Screen Display of the Self-check result and the failure history as below.
3) Any operation would cancel the Self -Diagnosis mode.
4) The following table shows the OSD symbols and contents of failure PWB in which failure most probably would be allocated according to the number of blinks.
Troubleshooting
How to get to Burn-in mode
This mode displays the test patterns of some single color raster in turn. These signals are from built-in generator of PDP panel. So it can be presumed that maybe the panel has some trouble when the screen of
Burn-in mode is abnormal.
Using the front control buttons with the set turned off (standby) can activate this mode.
Press the SUB-POWER button, INPUT SELECT button and VOLUME DOWN button at the
same time, and hold for more than 5 seconds.
The set turns on with single color raster and the OSD of [BURN IN: ON].
To escape from this mode, press the SUB-POWER button, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds. Burn-in mode will be released.
How to recover the remote and front key function
If remote and front key cannot operate after miss set special function by front keys, these functions can recover by below method.
Select No.175 and data set from [0] to [1].
Or
Press the SUB-POWER button and RIGHT ARROW button at the same time, and hold for more than 5 seconds.
Note : If the following operation is performed, it becomes impossible to operate remote and front key. Press the SUB-POWER button, INPUT SELECT button and RIGHT ARROW button at the same time, and hold for more than 5 seconds.
Factory Reset
After all of the adjustments of main chassis are finished, perform FACTORY RESET.
Press the SUB-POWER button, INPUT SELECT button and UP ARROW button at the same time, and hold for more than 5 seconds.
The unit is set to factory settings.

ONKYO BD - SP809 BLU RAY PLAYER MANUAL EJECTING INITIALIZATION AND POWER SUPPLY CIRCUIT

ONKYO BD - SP809

BLU RAY PLAYER 



MANUAL EJECTING INITIALIZATION AND POWER SUPPLY CIRCUIT

Manually Ejecting the disc.
When a disc cannot be removed due to malfunction or when an unplayable disc inserted, follow procedure to remove the disc.
1.Remove the top cover
2. Insert a screwdriver, in to the hole (as shown in the picture) straight and gently until the tray is eject.
3.Pull the tray out manually and remove the disc.

HOW TO INITIALIZE THE BLU RAY PLAYER
To put the program back at the factory default, initialize the BD player as following Procedure.
1.Turn the power on.
2.Remove the disc on the tray and close the tray.
3.Press >>(skip up) , 1, 2 and 3 buttons on the remote control in sequence. The flowing display will appear.

4.Press the STOP button on the remote control  SUCCESS will displayed on the VFD.
5. After initializing, the power will turn off automatically.    

POWER SUPPLY CIRCUIT 
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12V TRICKLE CHARGER ELECTRONIC PROJECT

12V TRICKLE CHARGER ELECTRONIC PROJECT 

         The 12v Trickle Charger circuit uses a TIP3055 power transistor to limit the current to the battery by turning off when the battery voltage reaches approx 14v or if the current rises above 2 amp. The signal to turn off this transistor comes from two other transistors - the BC557 and BC 547. Firstly, the circuit turns on fully via the BD139 and TIP3055. The BC557 and BC 547 do not come into operation at the moment. The current through the 0.47R creates a voltage across it to charge the 22u and this puts a voltage between the base and emitter of the BC547. The transistors turn on slightly and remove some of the turn-on voltage to the BD139 and this turns off the TIP3055 slightly. This is how the 2 amp max is created. As the battery voltage rises, the voltage divider made up of the 1k8 and 39k creates a 0.65v between base and emitter of the BC557 and it starts to turn on at approx 14v. This turns on the BC 547 and it robs the BD136 of "turn-on" voltage and the TIP3055 is nearly fully turned off. All battery chargers in Australia must be earthed. The negative of the output is taken to the earth pin.

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Thursday, February 26, 2015

EMERSON LC320EM8 A SERVICE MODE AND POWER SUPPLY CIRCUIT

EMERSON LC320EM8 A

 LCD TV


SERVICE MODE AND POWER SUPPLY CIRCUIT

Category : Television Repair 
How to make the Service remote control unit:
Cut “A” portion of the attached remote control unit as shown in Fig. 



Service mode:
1. Use the service remote control unit.
2. Turn the power on.
3. Press the service button on the service remote control unit. The following screen appears.
Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the service remote control unit, the display changes as follows.
VCOM Adjustment
1. Operate the unit for more than 20 minutes.
2. Set the color analyzer and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
3. Enter the Service mode.
4. Press [3] button on the remote control unit.
5. Press [CH. UP / DOWN] buttons on the remote control unit so that the color analyzer value becomes minimum.
White Balance Adjustment
*This adjustment is required when reparing T-CON CBA.
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity.
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL. DOWN] button on the remote control unit and select “C/D” mode.
5. [CUTOFF]
Press [3] button to select “COB” for Blue Cutoff adjustment. Press [1] button to select “COR” for Red Cutoff adjustment.
[DRIVE]
Press [6] button to select “DB” for Blue Drive adjustment. Press [4] button to select “DR” for Red
Drive adjustment.
6. In each color mode, press [CH. UP/ DOWN] buttons to adjust the values of color.
7. Adjust Cutoff and Drive so that the color temperature becomes 12000K (x= 0.272 / y= 0.278 ±0.005).
How to initialize the LCD television:
1. Turn the power on.
2. To enter the service mode, press the service button on the service remote control unit.
- To cancel the service mode, press [POWER] button on the remote control unit.
3. Press [INFO] button on the remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initialzing is complete. 

POWER SUPPLY CIRCUIT 
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Tuesday, February 24, 2015

SONY KDL-40W4730 - KDL-46W4730 - KDL-52W4730 SERVICE MODE AND POWER SUPPLY CIRCUIT

SONY KDL-40W4730 - KDL-46W4730 - KDL-52W4730

 LCD TV  



SERVICE MODE AND POWER SUPPLY CIRCUIT 



How to enter the Service Mode
Service adjustments to this model can be performed using the supplied Remote Commander RM-ED011
1. Turn on the power to the TV set and enter into the stand-by mode.
2. Press the following sequence of buttons on the Remote Commander
INFORMATION i > 5 > VALUME + POWER ON
3. Move to the corresponding adjustment item using the UP or DOWN arrow buttons on the Remote Commander.
4. Press the RIGHT arrow button to enter into the required menu item.
5. Adjust the data value using the UP or DOWN  arrow buttons on on the Remote Commander.
6. To go back at any time press the ‘Return’ button on the Remote Commander.
7. Press the ‘Menu’ button on the Remote Commander to quit the Service Mode when all adjustments have been completed.
To place the Remote Commander in ‘Service Mode’ press the following buttons together for two seconds.
INFORMATION > 5 > VOLAUME
To use the Remote Commander in ‘Service Mode’ press the rewind button on the Remote Commander twice.
TT will then appear in the bottom right hand corner of the TV.
To take the Remote Commander out of ‘Service Mode’ press the same buttons above together again for two seconds or remove the batteries from the Remote Commander.
 After carrying out the service adjustments, to prevent the customer accessing the ‘Service Menu’ switch the TV set OFF and then ON again.
 Product Version
1. The following menu appears on the screen when you enter the ‘Product Version’ menu.
POWER SUPPLY CIRCUIT DIAGRAM 

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SCHNEIDER 30M901 SERVICE MODE ADJUSTMENTS

SCHNEIDER 30M901

LCD TV


SERVICE MODE ADJUSTMENTS 


SERVICE MODE
Pressing“ i”key in RC to enter into User Menu, pressing pin“ 6”“ 4”“ 0”“ 5”keys to Factory Menu.
pressing “EXIT” to exit.
Checking of Analog Main Board
Procedures

1
Inserting P1, P2, P14 in Digital Board to P1001, P1002 and P5540 in Analog Board
2
Connecting Computer to S5504 via COM connector, turning off the reset switch in the connector
3
A. Setting PC mode in Digital Board;
B. Switching on the unit with RC;
C. After Screen is on, running FLASH PROGRAM for 2 seconds in Computer Communication Program;
D. Turning on the reset switch in the connector, then carrying out the program to burn

4
After burned, please take out the S5504 connector
5
Switching offÆResetÆpower on with RC, pressing “0” key and “OK” key to enter TV mode, the Noise Signal will be displayed, press“ i” in RC to enter into User Menu, and setting OSD to ENGLISH or other languages
6
Making an elementary setting in PICTURE menu: Brightness ---- 50, Contrast ---- 70, Color ---- 40, Tint ----10
7
Pressing “OK” to save and “exit”
8
Pressing “i” and “CH-” to select and “CH+” to enter into PROGRAM menu, pressing “CH-”to select “SEARCH >”, and pressing “VOL +” to searching channels. Press EXIT to exit when finished
9
Checking all channels to see whether the sound and picture are OK or not. Signal should be switched after applying SCART signal. Input and output function should be checked in SCART 1 & SCART 2. There is not output function in SCART 3. (“ 0” key in RC to open menu, “V” key to OK).
Adjustment of Digital Board
Procedures

1
A. Inserting P1 (8pins) in Digital Board to P1001 in Analog Main Board;
B. Connecting P14 in Digital Board to P5540 in Analog Main Board via 10Pins Line;
C. Connecting P24 in Digital Board to P1004 in Analog Main Board via line;
D. Inserting INVERTER switch Plug to P7 (Pin 3-5);
E. Connecting P2 in Digital Board to P1002 in Analog Main Board via line;
2) Inserting DC Plug in Extra Power Supplier to P18 in Digital Board, turning on the main power switch to electrify CPU (3.3V) in Digital Board;
3) A. Switching on the Unit using RC;
B. Electrifying Analog Board with 12V, +5V to IC JACASM in Digital Board simultaneously;
C. After several seconds, sound and picture will be OK. (TV mode is in normal mode without SCART Signal)
4) Applying TV signal (Gray Scale and Color Bar Signal), pressing “0”, “6”, “4”, “0”, “5” in RC, the AD9883 menu will be displayed.
Pressing “OK” to save and“ EXIT” to exit
* Note: Best Resolution
1024X768 60Hz mode.
6) DVI checking
Procedures

1 Inserting DVI plug into P10 in Digital Board

2 Pressing “ 0” in RC to enter into signal menu, pressing “CH+/CH-” to choose “DVI” and “OK” to enter into DVI mode

3 Applying the kinds of testing signal, whether they all can be identified and the output are normal in DVI signal sources

4 Entering into main signal menu and setting into the “TV” mode

5 Taking out DVI plug and shutting off AC power supply.
Adjustment of Complete LCD TV
Procedures

Adjustment of AGC
1. Power on the Unit and applying the TV signal sources. TV signal sources setting as below

f=48.25MHz
System: PAL B/G
Signal
Full color bar
Intension
65dB
2. Pressing “ i” key in RC to enter into User Menu, pressing pin “ 6”“ 4”“ 0”“ 5” keys to Factory Menu, pressing << key to select item, “V+& V-” to adjust the data. Setting AGC data to 14 to obtain the Noise of Screen Signal is at minimum. DVSS: ON
3. Setting BURN IN at On ( Analog Board is on when no signal, Normal User mode is OFF) LCD TV TCL Ver. 1.22B/13/10/2003 (Update irregularly)
Auto Format 4:3
Tuner AGC 14
Transparent OSD 66
DVSS ON
Burn-in Mode ON
Min.volume.1% 10
Sound curve.10% 64
Sound curve.20% 86
Sound curve.40% 105
Sound curve.80% 121
Sound curve.100% 127
4. Pressing“ EXIT” to exit
Adjustment of White Balance in VGA mode
1. Applying VGA signal, 1024 X 768 60Hz, switching signal source to PC mode,
9300K.
2. Choosing White Signal, using Color Temperature Instrument or White Balance Instrument to test the color coordinate.
3. Pressing“0”, “6”, “4”, “0”, “5” key in RC to enter into Factory Mode, pressing “CH+, CH-” to select item, “V+, V-” to adjust R
G B data to obtain x=284+5
Y==299+5

4. 7000K X=305+15
Y==320+15 (no use now)
5. 7500K X=299+15
Y==315+15 (no use now)
AUTO Adjustment of User Setting in VGA mode
1. Applying Square Signal, pressing “ i” key in RC to enter into User Menu.
2. Pressing “CH+, CH-” to select “AUTO” item, and “V+” to active the auto adjustment then screen will be dark instantly. If finished, screen will be ok automatically.
3. If auto adjustment lost or some disturb/noise in screen, please adjust PHASE by manual.
Applying signal modes

640 X 480 (60, 72, 75, 85Hz)
720 X 400 (60, 70Hz)
800 X 600 (60, 75, 85Hz)
1024 X 768 (60, 75, 85Hz)
1280 X 1024 (60, 75, 85Hz)
To do the checking and auto adjustment separately when applying the kinds of signals, if no problem exists, it is unnecessary to adjust the data in EEPROM.
Adjustment of White Balance in TV mode.
1. Applying SCART White Signal, using White Balance Instrument to test.
2. Pressing “0”, “6”, “4”, “0”, “5” key in RC to enter into Factory Mode, pressing “CH+, CH-” to select item, “V+, V-” to adjust R
G B data to obtain X=0.284, Y=0.299, color temperature: 9300, Luminance> 400cd.
3. Pressing“ EXIT” to exit.
Checking Complete LCD TV
1. Applying TV signal to check whether AGC can work normal. 40~100dB TV
signal).
If AGC is abnormal, please do fine tuning. (If overloading, please lower AGC Value)
2. Applying SCART signal to check whether the input and output of SCART can work normal in R
G B Y/C SCART, 16:9/4:3 mode.
3. Applying VGA signals to checking: 640 X 480 (60, 72, 75, 85Hz) 720 X 400 (60, 70Hz)
800 X 600 (60, 75, 85Hz)
1024 X 768 (60, 75, 85Hz)
1280 X 1024 (60, 75, 85Hz)
4 Checking PIP in TV Signal (VGA mode)
a. Pressing “ 0” to choose PC mode and“ OK” to enter into VGA mode, applying VGA signal.
b. Pressing  > key in RC to active PIP function, pressing this key continuously to scale up the PIP picture and disappeared circularly , there are four scales.
c. Pressing “<< ” key to locate the PIP picture from Top-left, Top-right, Bottom-right, Bottom-left and center circularly.
d. Pressing > key in RC to close the PIP when the picture is in largest scale.
d. Press Green Key in RC can switch the PIP signal source.
5 Checking PIP in DVI mode Pressing “ 0” to choose PC mode and“ OK” to enter into DVI mode. Repeat 4 to check PIP scale and location.
6 Safety Checking a. AC 3000V; b. Resistance> 4M

7 Default data setting: Applying factory signal, setting the data to default when in best picture, best sound
and so on.

Monday, February 23, 2015

HITACHI CM771ET CM772ET ADJUSTMENTS AND POWER SUPPLY CIRCUIT

HITACHI CM771ET - CM772ET 

CRT MONITOR 


ADJUSTMENTS AND POWER SUPPLY CIRCUIT 

ADJUSTMENTS
1. Power supply
1.1 Standby power supply voltage adjustment.
(1) Turn the switch of the unit off.
(2) Place a jumper wire across R943, Q801 (G)-(S), I101(26pin) to GND, I740(13pin) to GND on main-p.w.b to disable Main power supply voltage.
(3) Place resister 3.9k (31W) across C971(+) to GND
(4) Receive reverse cross hatch pattern of signal 94A.
(5) Connect a Digital multimeter across C981.
(6) Turn the switch of the unit on.
(7) Adjust Standby power voltage to 6.2  0.05V using R982.
(8) Turn the switch of the unit off.
(9) Remove the jumper wire.
1.2 PFC output voltage adjustment.
(1) Turn the switch of the unit off.
(2) Place a jumper wire across Q801 (G)-(S), I101(26pin) to GND, I740(13pin) to GND on main-p.w.b to disable horizontal output and EHV output.
(3) Place resister 3.9k (31W) across C971(+) to GND
(4) Receive normal cross hatch pattern of signal 94A.
(5) Connect a Digital multimeter between + and - of C920.
(6) Turn the switch of the unit on.
(7) Adjust R919 to 364  2V.
(8) Turn the switch of the unit off.
(9) Remove the jumper wire.
1.3 Main power supply voltage adjustment.
(1) Turn the switch of the unit off.
(2) Place a jumper wire across Q801 (G)-(S), I101(26pin) to GND, I740(13pin) to GND on main-p.w.b to disable horizontal output and EHV output.
(3) Place resister 3.9k (31W) across C971(+) to GND
(4) Receive reverse cross hatch pattern of signal 94A.
(5) Connect a Digital multimeter across C972.
(6) Turn the switch of the unit on.
(7) Adjust Main power supply voltage to 85.5  0.3V using R973.
(8) Turn the switch of the unit off.
(9) Remove the jumper wire.

2. Deflection circuit adjustment
2.1 SUB H.SIZE adjustment
(1) Turn the switch of the unit off.
(2) Connect a Digital multimeter across C771.
(3) Turn the switch of the unit on.
(4) Receive normal cross hatch pattern of signal 94A.
(5) Adjust H.SIZE to maximum and S.Pincushion minimum by the Front Key.
(6) Adjust R811 to the C771 voltage value to 130  0.5V.
(7) Receive normal cross hatch pattern of signal 30C and check the C771 voltage is at 42.5  1.5V.
2.2 High voltage adjustment
(1) Turn the switch of the unit off.
(2) Connect a high voltage meter, which is capable to measure up to 40kV, between CDT anode and GND.
(3) Receive normal cross hatch pattern of 94A signal.
(4) Turn the switch of the unit on.
(5) Adjust high voltage level to 27.0  0.3kV using R747.
(6) Turn the switch of the unit off.
(7) Remove the adjustment jig.
3. Video circuit
Prior to the video circuit adjustment, all sync. and Deflection circuit adjustment must be completed. The monitor must have been warmed up for more than 60 minutes. Video signal must be terminated with 75 and should provide the correct voltage at the monitor end.
3.1 Cut off adjustment
(1) Receive a signal of 94A with a blank signal pattern. (Black video)
(2) Connect a high impedance voltmeter (more than 1000M ) to the Screen terminal (G2) on the Video board. Adjust the Screen voltage pot on FBT to see 600  5V .
(3) After the screen voltage adjustment is completed, fix the SCREEN VR(FBT) shown in Attachment A.
(4) Ambient light on the surface of the CRT should show lower than 20 lux.
(5) Adjust R, G & B, BKG to show the CIE coordinate of
X=0.313 0.02, Y=0.329 0.02 at 1.2 cd/m2 (0.35ft-L).
If it looks difficult to obtain X and Y readings mentioned above, do the followings to obtain these numbers.
1) Reset Sub Brightness to 9Fh or 60h.
2) Reset Sub Brightness to CFh or 30h.
3) If the adjustment can not be done with 1) and 2).
 1.When the value shown below can not hight: Change the R827 to R82E.
 2.When the value shown below can not low: Change the R827 to R82D.
3.2 White balance adjustment (Color 2)
(1) Receive a signal of 94A with a 100 100 mm window pattern.
(2) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(3) Adjust the light output to 80 cd/m2(24.6ft-L) at the center of screen by adjusting Sub Contrast Control.
(4) Adjust the white balance of high light output by Green and Blue color adjustments to read CIE coordinate of X=0.313  0.008, Y=0.329  0.008
(5) Adjust Contrast Control to read 3 cd/m2 (0.87ft-L).
(6) Adjust Red and Blue BKG to read the same CIE coordinate shown in 3.2.(4)
(7) Adjust Contrast or Sub Contrast Control to read 80 cd/m2(23.3ft-L) and then confirm CIE coordinate. If it shown out range, go back to 3.2(4)
(8) Register the readings of R/G/B BKG and Color data (Color 2) to the microprocessor.
3.3 White balance adjustment (Color 1)
(1) Receive a signal of 94A with a 100 100 mm window pattern.
(2) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(3) Adjust the light output to 80 cd/m2(23.3ft-L) at the center of screen by adjusting Sub Contrast Control in Color 2 mode.
(4) Adjust the white balance of high light output by R/G/B color adjustments to read CIE coordinate of 
X=0.281  0.008, Y=0.311  0.008
(Either Red color or Green color must be set to the maximum (FFh) )
(5) Register the readings of R/G/B BKG and Color dada (Color 1) to the microprocessor.
3.4 White balance adjustment (Color 3)
(1) Receive a signal of 94A with a 100 100 mm window pattern.
(2) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(3) Adjust the light output to 80 cd/m2(23.3ft-L) at the center of screen by adjusting Sub Contrast Control in Color 2 mode.
(4) Set Red color to the maximum (FFh).
(5) Adjust the white balance of high light output by Green and Blue color adjustments to read CIE coordinate of X=0.336  0.008, Y=0.352  0.008
(6) Register the readings of R/G/B BKG and Color data (Color 3) to the microprocessor.
3.5 White balance adjustment (DMS)
(1) Register Color 1 data(R/G/B BKG and Color data) to the microprocessor as DMS Color data.
3.6 Brightness adjustment
(1) White balance adjustment must have been done before Brightness adjustment.
(2) Receive signal of 94A with a blank signal pattern.(Black video)
(3) Set Brightness and Contrast, C-Cont Control to their maximums.
(4) Ambient light on the surface of the CRT should show lower than 20 lux.
(5) Select Color Select to Color 1.
(6) Adjust the light output to 1.2 cd/m2 (0.35 ft-L) at the center of screen by adjusting Sub Brightness Control.
(7) Register the readings of Sub Brightness to the microprocessor (Sub Brightness data).
(8) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(9) Receive a signal 94A with a window pattern (100  100 mm)
(10) Adjust the light output to(*1) 150 cd/m2 (43.8 ft-L) at the center of screen by adjusting Sub Contrast Control.
(11) Register the readings of Sub Contrast to the microprocessor (DMS Sub Contrast data).
(12) Adjust the light output to (*1)125 cd/m2 (36.5 ft-L) at the center of screen by adjusting Sub Contrast Control.
(13) Register the readings of Sub Contrast to the microprocessor (Sub Contrast data).
(14) Receive a signal of 94A with a full white pattern.
(15) Adjust the light output to (*1) 110 cd/m2 (32.1 ft-L) at the center of screen by adjusting ACL Control.
(16) Register the readings of ACL to the microprocessor (ACL data).
4 Focus adjustment
(1) Receive signal 94A with a full screen “E” characters.
(2) Set user Contrast control to its maximum.
(3) Set user Brightness control so that the back ground raster is just diminished.
(4) Adjust S-Focus control on the FBT so that focus at the middle points between the center of the screen to its best.
(5) Adjust D-Focus control on the FBT so that focus at four corners of the screen to its best.
POWER SUPPLY CIRCUIT 
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MCINTOSH MA6900 TONE CONTROL CIRCUIT

MCINTOSH MA6900


TONE CONTROL CIRCUIT 

TONE COTROL COMPONENTS
C1 C2  CAP M POLY .1UF 10% 100VDC
C3 C4  CAP ELECT 10UF 16V (4X5 CASE)
C5 C6  CAP MONO 220PF 100V 10% NPO
C7 C8  CAP MONO 47PF 200V 10% NPO
C9 C10  CAP MONO 22PF 200V 10% NPO
C11 C12  CAP ELECT 220UF 25V
C13 C14 C33 C34  CAP ELECT 47UF 50V
C15 C16 C43 C44 C45 C46 C54  CAP ELECT 10UF 50V
C17 C18  CAP M POLY .047UF 5% 63VDC
C19 C20  CAP ELECT 1.5UF 10% 50V
C21 C22  CAP M POLY .01UF 5% 63VDC
C23 C24  CAP M POLY .47UF 5% 50/63VDC
C25 C26  CAP MPOLY .0033UF 5% 63VDC
C27 C28  CAP M POLY .15UF 5% 63VDC
C29 C30  CAP POLY 0.001MF 5% 63VDC
C31 C32  CAP M POLY .033UF 5% 63VDC
C35 C36 C37 C38  CAP M POLY .22UF 5% 63VDC
C39 C40 C41 C42  CAP MONO 470PF 100V 10% NPO
C47 C48 C49 C50 C51 C52  CAP MONO .1UF 50V 20% Z5U
C53  CAP ELECT 47UF 10V BP
D1 D2  DIODE SILICON
IC1 IC6 IC7  IC DUAL OPERATIONAL AMPLIFIER
IC2 IC3 IC4 IC5  IC OPERATIONAL AMPLIFIER
J1  CONN 8 POS MALE FRICTION LOCK
J2  CONN 4 PIN
J3  CONN MALE 6 POS RT ANGLE
K1 K2 K3  RELAY REED FORM 1A 5V 500 OHMS
R1  POT 50KAX2
R2  POT BALANCE 2KOHM
R3 R4 R5 R6 R7  POT EQUAL
R9 R10  RES MF 2.21K 1% 1/4W
R11 R12  RES MF 3.32K 1% 1/4W
R13 R14  RES MF 475K 1% 1/4W
R15 R16 R19 R20  RES MF 1K 1% 1/4W
R17 R18  RES MF 10K 1% 1/4W
R21 R22 R45 R46  RES MF 2.74K 1% 1/4W
R23 R24 R27 R28 R31 R32 R35 R36  RES MF 681 1% 1/4W
R25 R26R29 R30 R33 R34 R37 R38 R43  RES MF 100K 1% 1/4W
R39 R40  RES MF 475 1% 1/4W
R41 R42  RES MF 40.2K 1% 1/4W
R44 R51 R52  RES MF 100K 1% 1/4W
R47 R48  RES MF 33.2K 1% 1/4W
R49 R50  RES MF 22.1 1% 1/4W
R53 R54  RES MF 100 1% 1/4W
R55 R56 R57 R58  RES MF 10 1% 1/4W
CIRCUIT DIAGRAM 
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MCINTOSH MC2000 CIRCUIT

MCINTOSH MC2000

CIRCUIT



Power Output
130 watts into 8, 4 or 2 ohm loads is the minimum sine wave continuous average power output per channel from 20Hz to 20,000Hz with both channels operating.
Power Requirement
100 Volts, 50/60Hz at 5.8 Amps
120 Volts, 50/60Hz at 4.8 Amps
230 Volts, 50/60Hz at 2.5 Amps
ABOUT SCHEMATIC
. The heavy lines on the schematics denote the primary signal path.
2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions:
a. AC input at 120 volts, 50/60Hz
b. All voltages are +/-10% with respect to ground.
A high impedance (10megaohm) voltmeter must be used.
3. Unless otherwise specified:
a. Resistors values are in ohms.
b. Capacitor values are in microfarads (uF).
c. Inductor values are in microhenries (uH).
4. On PC Board Drawings, Square Pad Indicates:
a. Polarized Capacitors - Positive
b. Diode - Cathode
c. Others - Pin 1
POWER AMP CIRCUIT 

VU METER CIRCUIT 
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VU METER COMPONENT LIST
ZENERDIODE 6.2V 5% 500MW D12
DIODERECTIFIERD2 D11
FUSE 2ASLO-BLO 5 X 20 250VIEC F1
MALECONN 3 POS RT ANGLEJ2-
MALECONN 6 PIN RT ANGLEJ1-
4 PIN RT.ANGLEJ3-
TRIAC8A 200VQ8
TRANSISTOR NPN MPS4124 2K/REEL Q1 Q5
TRANSISTOR PNPQ2 Q6
TRANSISTOR P.CHANNEL JUNC.FET Q7
TRANSISTOR NPNQ3 Q4
ICREGULATOR -12VIC2
ICREGULATOR 12VIC1
DUALOPERATIONAL AMPLIFIER IC3 IC4
TRIM POT100K OHM 20%R10
RES CF3.3K 5% 1/4WR23
RES CF2.7M 5% 1/4WR1
RES CF10 5% 1/4WR26
CARB FILMRES 680 OHMS 5% 1/2W R24
RES MF10K 1% 1/4WR7 R20 R22
RESMF10K 1% 1/4WR7 R22
MF 499 OHMSR17
METALFILM RES 1K 1% 1/4WR19 R25
16.5K 1% 1/4WR18
METALFILM RES 200K 1% 1/4W R6 R12
METALFILM RES 150K 2% 1/4W R9
METALFILM RES 22.1K 1% 1/4W R21
METALFILM RES 100 OHM 1% 1/4W R11 R16
METALFILM RES 10M 1% 1/4W R8
METALFILM RES 1M 1/4WR2
METALFILM RES 2.74M OHM 1/4WR13
MF RES3.92K 1% 1/4WR15
MF RES15K 1% 1/4WR5 R14
MF RES13.7K 1% 1/4WR20

DAIKIN INVERTER AC ERROR CODES

DAIKIN INVERTER 

AC  

ERROR CODES


Indoor Unit
FTXS30LVJU
FTXS36LVJU

Outdoor Unit
RKS30LVJU
RKS36LVJU

U0
Refrigerant Shortage
Refrigerant shortage detection I:
Refrigerant shortage is detected by checking the input current value and the compressor running frequency. If the refrigerant is short, the input current is lower than the normal value.

Refrigerant shortage detection II:

Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the electronic expansion valve. If the refrigerant is short, the discharge pipe temperature tends to rise.

Refrigerant shortage detection III:

Refrigerant shortage is detected by checking the difference between suction and discharge
temperature.

Supposed Causes


 Disconnection of the discharge pipe thermostat, indoor or outdoor heat exchanger  thermostat, room or outdoor temperature thermistor

 Closed stop valve

 Refrigerant shortage (refrigerant leakage)

 Poor compression performance of compressor

 Defective electronic expansion valve.
U2
Low-voltage Detection or Over-voltage Detection
Indoor Unit


The zero-cross detection of the power supply is evaluated by the indoor unit PCB.

Outdoor Unit

Low-voltage detection:

An abnormal voltage drop is detected by the DC voltage detection circuit.

Over-voltage detection:
An abnormal voltage rise is detected by the over-voltage detection circuit.

Supposed Causes


 Supply voltage is not as specified.

 Defective DC voltage detection circuit

 Defective over-voltage detection circuit

 Defective PAM control part

 Disconnection of compressor harness
 Noise
 Momentary fall of voltage
 Momentary power failure
 Defective indoor unit PCB


U4
Signal Transmission Error (between Indoor Unit and Outdoor Unit)
The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal.


The data sent from the outdoor unit cannot be received normally, or the content of the data is abnormal.


Supposed Causes


Wiring error

Breaking of the connection wires between the indoor and outdoor units (wire No. 3)

Defective outdoor unit PCB

Defective indoor unit PCB

Disturbed power supply waveform.


U7
Signal Transmission Error on Outdoor Unit PCB
Communication error between microcomputer mounted on the main microcomputer and PM1.


The abnormality is determined when the data sent from the PM1 can not be received for 9

seconds.

 The error counter is reset when the data from the PM1 can be successfully received.

 Supposed Causes

Defective outdoor unit PCB.

UA
Unspecified Voltage
The supply power is detected for its requirements (different from pair type and multi type) by the


indoor / outdoor transmission signal.

The pair type and multi type are interconnected.

Supposed Causes


 Wrong models interconnected

 Wrong wiring of connecting wires

 Wrong indoor unit PCB or outdoor unit PCB mounted

 Defective indoor unit PCB

 Defective outdoor unit PCB

E1
Outdoor Unit PCB Abnormality
 The system checks if the microprocessor is working in order.


 The system checks if the zero-cross signal comes in properly.

 The microprocessor program runs out of control.

 The zero-cross signal is not detected.

Supposed Causes


 Defective outdoor unit PCB

 Broken harness between PCBs

 Noise

 Momentary fall of voltage

 Momentary power failure, etc.


E5
OL Activation
A compressor overload is detected through compressor OL.


 If the error repeats, the system is shut down.

 Reset condition: Continuous run for about 60 minutes without any other error

* The operating temperature condition is not specified.

Supposed Causes


 Defective discharge pipe thermistor

 Defective electronic expansion valve or coil

 Defective FourWay valve or coil

 Defective outdoor unit PCB

 Refrigerant shortage
 Water mixed in refrigerant
 Defective stop valve.


E6
Compressor Lock
A compressor lock is detected by checking the compressor running condition through the position detection circuit.

09/12 class

 Operation stops due to over current.

 If the error repeats, the system is shut down.

 Reset condition: Continuous run for about 11 minutes without any other error

15/18/24/30/36 class

 A compressor lock is detected by the current waveform generated when applying high frequency voltage to the motor.
 If the error repeats, the system is shut down
 Reset condition: Continuous run for about 5 minutes without any other error.

Supposed Causes


 Compressor locked

 Compressor harness disconnected

E7
DC Fan Lock
 An error is determined with the high-voltage fan motor rotation speed detected by the Hall  IC.


 The fan does not start in 15 ~ 30 seconds (depending on the model) even when the fan  motor is running.

 If the error repeats, the system is shut down.

 Reset condition: Continuous run for about 11 minutes (09/12 class) or 5 minutes (15/18/24/30/ 36 class) without any other error.

Supposed Causes


 Foreign matter stuck in the fan

 Defective fan motor

 Defective outdoor unit PCB


E8
Input Over current Detection
An input overcurrent is detected by checking the input current value with the compressor running.


 The current exceeds about 9.25 ~ 20 A for 2.5 seconds with the compressor running.

(The upper limit of the current decreases when the outdoor temperature exceeds a certain

level.)

Supposed Causes


 Outdoor temperature is out of operation range.

 Defective compressor

 Defective power module

 Defective outdoor unit PCB

 Short circuit

EA
FourWay Valve Abnormality
The room temperature thermistor and the indoor heat exchanger thermistor are checked if they


function within their normal ranges in each operation mode.

A following condition continues over 1 ~ 10 minutes after operating for 5 ~ 10 minutes.

 Cooling / Dry

(room thermistor temp. – indoor heat exchanger temp.) < –5°C (–9°F)

 Heating
(indoor heat exchanger temp. – room thermistor temp.) < –5°C (–9°F)
 If the error repeats, the system is shut down.

 Reset condition: Continuous run for about 60 minutes without any other error.
Supposed Causes


 Disconnection of fourway valve coil

 Defective fourway valve, coil, or harness

 Defective outdoor unit PCB

 Defective thermistor

 Refrigerant shortage
 Water mixed in refrigerant
 Defective stop valve


F3
Discharge Pipe Temperature Control
An error is determined with the temperature detected by the discharge pipe thermistor.
Supposed Causes


 Defective discharge pipe thermistor

(Defective outdoor heat exchanger thermistor or outdoor temperature thermistor)

 Defective electronic expansion valve or coil

 Refrigerant shortage

 Defective fourway valve
 Water mixed in refrigerant
 Defective stop valve
 Defective outdoor unit PCB


F6
High Pressure Control in Cooling
High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the


temperature sensed by the outdoor heat exchanger thermistor exceeds the limit.

Supposed Causes

 The installation space is not large enough.

 Dirty outdoor heat exchanger

 Defective outdoor fan motor

 Defective stop valve

 Defective electronic expansion valve or coil
 Defective outdoor heat exchanger thermistor
 Defective outdoor unit PCB


H0
Compressor System Sensor Abnormality
 The system checks the DC current before the compressor starts.


 The DC current before compressor start-up is out of the range 0.5 ~ 4.5 V (sensor output

 converted to voltage value)

 The DC voltage before compressor start-up is below 50 V.
Supposed Causes


 Broken or disconnected harness

 Defective outdoor unit PCB


H0
 The system checks the supply voltage and the DC voltage before the compressor starts.


 The system checks the compressor current right after the compressor starts.

 The supply voltage and the DC voltage is obviously low or high.

 The compressor current does not run when the compressor starts.

Supposed Causes


 Disconnection of reactor

 Disconnection of compressor harness

 Defective outdoor unit PCB

 Defective compressor

H6
Position Sensor Abnormality
A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit.


If the error repeats, the system is shut down.

Reset condition: Continuous run for about 11 minutes (09/12 class) or 5 minutes (15/18/24/30/ 36 class) without any other error

Supposed Causes


 Disconnection of the compressor relay cable

 Defective compressor

 Defective outdoor unit PCB

 Start-up failure caused by the closed stop valve

 Input voltage is outside the specified range.

H8
DC Voltage / Current Sensor Abnormality
DC voltage or DC current sensor abnormality is identified based on the compressor running


frequency and the input current.

 If the error repeats, the system is shut down.

 Reset condition: Continuous run for about 60 minutes without any other error
Supposed Causes


 Defective outdoor unit PCB


H8
CT or Related Abnormality
A CT or related error is detected by checking the compressor running frequency and CT-detected input current.
Supposed Causes

 Defective power module

 Broken or disconnected wiring

 Defective reactor

 Defective outdoor unit PCB


H9,J3,J6,P4
Thermistor or Related Abnormality (Outdoor Unit)
This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor.
Supposed Causes


 Disconnection of the connector for the thermistor

 Defective thermistor corresponding to the error code

 Defective heat exchanger thermistor in the case of J3 error (outdoor heat exchanger thermistor in cooling operation, or indoor heat exchanger thermistor in heating operation)

Defective outdoor unit PCB


L3
Electrical Box Temperature Rise
 An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off.


Supposed Causes

 Defective outdoor fan motor

 Short circuit

 Defective radiation fin thermistor

 Disconnection of connector

 Defective outdoor unit PCB

L4
Radiation Fin Temperature Rise
A radiation fin temperature rise is detected by checking the radiation fin thermistor with the


compressor on.

Supposed Causes


 Defective outdoor fan motor

 Short circuit

 Defective radiation fin thermistor

 Disconnection of connector

 Defective outdoor unit PCB
 Silicon grease is not applied properly on the radiation fin after replacing the outdoor unit PCB.

L5
Output Overcurrent Detection
An output overcurrent is detected by checking the current that flows in the inverter DC section.
Supposed Causes

 Poor installation condition

 Closed stop valve

 Defective power module

 Wrong internal wiring

 Abnormal power supply voltage
 Defective outdoor unit PCB
 Defective compressor