Daewoo 14q2 ユーザーズマニュアル

41

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