Saturday, January 25, 2014

HOW TO ENTER SERVICE MODE - MEMOREX MDV1402 - SMPS SCHEMATIC - MEMORY REPLACEMENT


SERVICE MODE
  • Press “MUTE” =>“CALL” =>“-\--“=>“CALL” =>“MUTE” buttons in sequence to enter into factory mode. 
  • Press [Program+] / [Program-] to select items and press [VOLUME+] / [VOLUME-] key, to make data adjustment of corresponding factory menus.
  • Press “EXIT” key to exit factory mode.
REPLACEMENT OF MEMORY IC
(1) Standby off .  Switch the power off and unplug the power cord from AC outlet.
(2) Replace IC.  Be sure to use memory IC written with the initial data values.
(3) Standby On.  Plug the power cord into the AC outlet and switch the power on.
(4)  Check and set SYSTEM default value:
1) Press “MUTE” =>“CALL” =>“-\--“ =>“CALL” =>“MUTE” buttons in sequence to enter into factory status.
2)  If the memory IC haven’t been written with the initial data, press [Program+] / [Program-] to select item INIT and press [VOLUME+] / [VOLUME-] to start initialize memory IC.
3)  Check the setting value of the SYSTEM default value of Table below. If the value is different, select items by [Program+] / [Program-] keys and set value by [VOLUME+] / [VOLUME-] keys.
4) Press “EXIT” button to return to the normal screen.
POWER SUPPLY [SMPS] SCHEMATIC
IC Voltages