Philips 26MF337B/27 Service Manual page 14

14
TPM1.0U LA
5.3 Repair Flow Chart
1.No work/LED is off
5. Service Modes, Error Codes and Fault Finding
Check if
power switch is
normal
Yes
Check
IR board CN001
pin1=0V,pin2=3.7V,
pin3=3V,pin4=2.85V
,pin5=5V,pin6
=3.3V
Yes
Check scaler board U102
pin1=14V,pin4=1.22V,
pin7=16V,pin8=5V,
2.No raster/picture too
dim
Check
Inverter board
CN852,pin1=16V,
pin5=0.9V,pin6
=3V
Yes
Check
Inverter board
U811 pin2=5V,Q821
pin=5,6=16V
Yes
Check scaler board
No
Replace Power switch
No
Check IR board
No
Check Scaler board
No
Check U811,Q821