Trouble Shooting Charts - Daewoo DTC-14D9 series Service Manual

12. TROUBLE SHOOTING CHARTS

1. NO RASTER
CHECK MAIN
B+(123V)
ABNORMAL
CHECK VOLTAGE
OF C804(180UF)
295VDC AT AC 220V
ABNORMAL
CHECK/ REPLACE
F801
CHECK/REPLACE
D802~D805,R803
CHECK VOLTAGE AT
PIN 3 OF I701
ST-BY:H
POWER ON:L
CHECK VOLTAGE AT
PIN
15(5V), 25(3.3V)
NORMAL
CHECK SIGNAL AT PIN
59(SCL), 60(SDA)
OF I501
CHECK/REPLACE
X501(20.25MHZ), I501
NORMAL
NORMAL
CHECK/REPLACE
I801
(STR-F6656)
CHECK/REPLACE
I802(LTV-817C)
CHECK / REPLACE
I806(3.3V)
I804(7505)
ABNORMAL
CHECK HEATER VOLTAGE
VIDEO B+(180V) LINE
27V & 13.5V
ABNORMAL
CHECK Horizontal
plose AT PIN 24 OF I501
ABNORMAL
CHECK VCC
AT PIN 25(3.3V) OF I501
NORMAL
CHECK SIGNAL AT
PIN 59,60 OF I501
CHECK / REPLACE
I501
CHECK / REPLACE
Q402, Q401,T402
R404,D401
CHECK / REPLACE
CRT BLOCK
-44-
NORMAL
NORMAL