Trouble Shooting Charts - Daewoo DTD-14D3 Service Manual

APPENDIX

TROUBLE SHOOTING CHARTS

CAUTION
1. NO RASTER
CHECK MAIN
B+(123V)
ABNORML
CHECK VOLTAGE
OF C805(180uF)
295Vdc AT AC 220V
ABNORML
CHECK /REPLACE
F801
CHECK /REPLACE
D805~D808,R802
CHECK VOLTAGE AT
PIN 5 OF I701
ST-BY:H,
POWER ON:L
CHECK VOLTAGE AT
PIN
9(2.5V), 44(3.3V)
NORMAL
ABNORML
CHECK SIGNAL AT PIN
2(SCL), 3(SDA)
OF I701
CHECK /REPLACE
X701(6MHz), I701
NORMAL
NORMAL
CHECK / REPLACE
I801
(STR-F6656) &
CHECK / REPLACE
I802 (DPM123TIA)
MODULE POWER
ABNORML
CHECK / REPLACE
I803(X0202DA)
I808(KA7805)
I804(LP2950 3.3V)
ABNORML
CHECK Horizontal drive
pluse AT PIN 32 OF I501
ABNORML
CHECK Horizontal VCC
AT PIN 31(9V) OF I501
NORMAL
CHECK SINGNAL AT
PIN34,35 OF I501
CHECK / REPLACE
I501
CHECK / REPLACE
Q402,Q401,T402
R425,D401
flat(D402,D403)
CHECK /REPLACE
CRT BLOCK
- 19 - - 19 -
CHECK Heater Voltage
VIDEO B+(220V) LINE
27V & 12V
NORMAL
NORMAL