Tuesday, November 10, 2015

PHILIPS 26TA2800/93 - 26TA2800/98 - 26TA2800/79 - 32TA2800/93 - 32TA2800/98 - 32TA2800/79 SERVICE MODE TROUBLESHOOTING AND POWER SUPPLY CIRCUIT

PHILIPS 26TA2800/93 - 26TA2800/98 - 26TA2800/79 - 32TA2800/93 - 32TA2800/98 - 32TA2800/79 


HOW TO ENTER SERVICE MODE TROUBLESHOOTING AND POWER SUPPLY CIRCUIT 

HOW TO ENTER TO FACTORY MODE
It can enter Factory Mode
1. Press" Menu in normal operation mode to enter OSD.
2. Press "062596+Menu on the button (RC) remote control in OSD.

3. The screen will appear F3 content in the bottom, choose it and press the right key.
HOW TO ENTER TO CSM
It can display CSM windows message when press Menu+123654 on the button (RC) remote control in normal operation mode.

OSD behavior:
Before press number key change OSD item
Now remove previous function, press number key then press OK will change value
Step1: press MENU+062596 in user mode.
tep2: choose F3 98 V1.77.74.3,press the right key, then enter the factory mode
DISASSEMBLING THE BACK COVER
Remove the Back cover assy.
Remove the 10 screws on the bottom side


TROUBLE SHOOTING
No work/LED is off
Check if power switch is normal > Replace Power switch
Check IR board CN0201 pin3=5V,pin5=5V > Check IR board
Check scaler board U7105 pin1=24V,pin4=5V
No raster/picture too dim
Check power board CN913,pin1=24V, pin3=12V > Check Scaler board
Check power board IC920 pin2,IC970 pin2=12V > Check IC920,IC970
Check scaler board
No picture/LED is green
Check scaler board U7105 pin1=24V,pin4=5V > Check power
Check if working voltage U7104 pin1=5V, pin4=3.3V > Check circuit around each regulator and eliminate short and open situation
Check if clock source X4101 > Replace X4101
Check if RGB,clk,H/V and DE signal output 128 bits TTL > Try to replace flash Rom EEPROM
Check resistors-network > Replace bad resistors network
Replace LVDS cable
No TV sound
Check if tuner TU2101 pin11 output IF signal > Replace TU2101
Check U4101
No earthphone sound
Check U6301 pin33=3.3V > Eliminate short and open situation
Check U6303 pin6= 5V pin5,7=HPL/HPR >  Replace U6303
Replace Side AV Board
No remote function
Tty another remote control > Replace one good remote control
Check IR receiver
7.LED and function key poor
Check circuit around control board and cable between control board and scaler board
POWER SUPPLY CIRCUIT 
SMPS DRIVER IC FAN5541N

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