Daewoo 14Q1 - Manual (Page 40)

41
2. NO PICTURE(RASTER OK)
CHECK VIDEO SIGNAL
AT PIN 13 OF I501(TDA8374A)
[REFER TO WAVEFORM ]
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
NORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
ABNORMAL
CHANGE INPUT MODE
RF AV RF
CHECK WAVEFORM AT
PIN 29, PIN 30 OF I501
CHECK PICTURE CONDITION
NORMAL NORMAL
FAVOURITE
CHECK / REPLACE
I701
& PERIPHERAL
COMPONENT
CHECK WAVEFORM
AT PIN 31, PIN 32
OF I501
CHECK / REPLACE
I501
CHECK WAVEFORM
AT PIN 19, 20, 21
OF I501
CHECK / REPLACE
I502(TDA4665)
I503(TDA8395)
CHECK VIDEO SIGNAL
AT CATHOD OF CRT
[REFER TO WAVEFORM
]
CHECK SIGNAL
AT PIN 18
OF I501
CHECK / REPLACE
CRT
CHECK VOLTAGE
VIDEO B+,
HEATER
OK
OK
OK
OK
CHECK
HORIZONTAL
CIRCUIT PARTS
CHECK / REPLACE
AT PIN 40, 41, 42
OF I701
CHECK / REPLACE
I901, I902, I903
(CRT BOARD)
CHECK / REPLACE
Q705,Q706,Q707
Q708,Q709,Q710
CHECK /
REPLACE
Q702, Q703
CHECK /
REPLACE
R759,R720
I703
CHECK BAND SELECT
VOLTAGE AT BL,BH,BU
& B+ VOLTAGE
OF TUNER
CHECK TUNING VOLTAGE
AT VT OF TUNER
CHECK / REPLACE TUNER
CHECK 33V LINE
CHECK / REPLACE
Q101, Q102, SF101
CHECK / REPLACE
I501