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35
32PD7800/42PD7800 (PW2)
[Sound Circuit]
No sound of TV (Main)
Are waveforms at
pin 30,31 of
IN01(L,R)?
Is waveforms at
pin 2 of IN01
(SIF)?
NO
No
Is waveforms at
pin 22 of U101
(SIF)?
No
Check U101
No
Yes
Yes
Yes
Yes
Check PTV2 connector
or Video PWB
Check arpund
QN01,QN02
Check
Video PWB
Is voltage at
pin 2205 of IN01
("H")?
Dose voltage of pin 22
change for Low to
High
Check
around
IN01
Yes
How about base of
QK02?
No
No
Check
QK02,QK03
Yes
Check I001 of
Formatter PWB
No
Check
QK02,QK03
No Sound of TV
(Sub)
Is waveform at
pin12 of PTV3?
Yes
Is waveform at
pin14 ofU102
Check U102
Check
R1C8
No
Yes
Содержание 32PD7800
Страница 10: ...10 32PD7800 42PD7800 PW2 Block diagram ...
Страница 45: ...45 32PD7800 42PD7800 9 Basic circuit diagram 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 46: ...46 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 47: ...47 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 48: ...48 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 49: ...49 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 50: ...50 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 51: ...51 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 52: ...52 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 53: ...53 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 54: ...54 32PD7800 42PD7800 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Страница 105: ...105 32PD7800 42PD7800 PW2 MEMO ...
Страница 106: ...YK No 013E Digital Media Division Printed in Japan JE QR62851 32PD7800 42PD7800 ...