Daewoo DTC-14D9 series, Service Manual

Page: 45 / 54

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