30
42PD7200 (PW2)
TV Sound
[Tuner PWB Circuit]
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
Yes
Yes
Yes
Yes
Check PTV2 connector
or Video PWB
Check arpund
QN01,QN02
Is voltage at
("H")?
Check
around
IN01
Yes
How about base of
QK02?
No
No
Check
QK02,QK03
Yes
Check I001 of
Formatter PWB
No
Check
QK02,QK03
pin 22 of IN01
No sound of TV
Does voltage at pin 22
of IN02 change for Low to
High?
Summary of Contents for 42PD7200
Page 10: ...9 42PD7200 PW2 Block diagram ...
Page 41: ...40 42PD7200 PW2 MEMO ...
Page 42: ...41 42PD7200 PW2 9 Basic circuit diagram 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 43: ...42 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 44: ...43 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 45: ...44 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 46: ...45 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 47: ...46 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 48: ...47 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 49: ...48 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 50: ...49 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 51: ...50 42PD7200 PW2 1 2 3 4 5 6 6 1 2 3 4 5 D A B C E F G ...
Page 59: ...58 42PD7200 PW2 11 Block diagram ...
Page 63: ...62 42PD7200 PW2 Disassembly diagram 42V 13P CONNECTOR A5 2 Gasket Gasket ...
Page 66: ...THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA ...
