Trouble Shooting Charts - Daewoo DTD-14D3 ME 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
ABNORML
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
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NORMAL
NORMAL
CHECK / REPLACE
I801
(STR-F6656) &
CHECK / REPLACE
I802 (DPM123TIA)
MODULE POWER
NORMAL
CHECK / REPLACE
I803(X0202DA)
I808(KA7805)
I804(LP2950 3.3V)
- 19 - - 19 -
CHECK Heater Voltage
VIDEO B+(220V) LINE
27V & 12V
NORMAL
ABNORML
CHECK Horizontal drive
pluse AT PIN 32 OF I501
NORMAL
ABNORML
CHECK Horizontal VCC
AT PIN 31(9V) OF I501
CHECK SINGNAL AT
PIN34,35 OF I501
CHECK / REPLACE
I501
CHECK / REPLACE
Q402,Q401,T402
R425,D401
flat(D402,D403)
CHECK /REPLACE
CRT BLOCK