Saturday, October 26, 2013

CHANGHONG - 21NF55 _ 21PF93 – STR-G5653 _ SMPS SCHEMATIC (Circuit diagram) _ SERVICE MODE


SMPS SCHEMATIC
CLICK ON THE PICTURES TO ZOOM IN
To enter the USER SERVICE mode
Caution: The user service mode adjustment can be changed only when service personnel adjust the whole set data during servicing. As the control data have dramatic effects on functions and performance of the TV, service personnel should not tell user how to enter the SERVICE mode to avoid improper data settings.
  • Set the volume to [0]. Then press and hold the MUTE button on the remote control, and  press the MENU button on the TV to enter the SERVICE mode . (In this case, the S mode cannot be stored in the EEPROM. 
  • To exit from the S mode, turn off the TV set.)
  • After entering the S mode, Red  “S” is displayed on the upper center of the screen and MENU1 is default.  Use the POS [+/ -] buttons to highlight an adjustment and the VOL[+/-]   buttons to adjust it. The adjusted data are immediately output and stored in the EEPROM.
Adjustment and Option Data in S mode
  • The items remarked with “ *” , not affecting functions of the whole set, can be adjusted depending on models.
  • The items remarked with “ ***” , affecting functions of the whole set, can be adjusted depending on functions of models.
  • To write in logo, use the  ↓/ ↑buttons to highlight an adjustment and the  < -- / à  buttons to adjust.
  • The data sheet may differ dependent on different models.
  • The data sheet may differ dependent on different CRTs for the same model.
KEY ICS TECHNICAL DATA
The super chips  TDA935X/6X/8X are good in pins compatibility. Differences among them are shown as follows.
TDA9351 à48K àPAL/NTSC/SECAM+1 PAGE TELETEST
TDA9350 à48K àPAL/NTSC+1 PAGE TELETEST
TDA9361 à64K àPAL/NTSC/SECAM+10 PAGE TELETEST
TDA9360 à64K àPAL/NTSC+10 PAGE TELETEST
TDA9380 à32K àPAL/NTSC
TDA9387 à32K àNTSC