Panasonic PT-VZ570 Service Manual page 38

SECTION 1 SERVICE INFORMATION
■ No sound
Check each cable connection
No sound with built-in speaker
No sound with external speakers
No sound with built-in and external speakers
[ANALOG]
Check the connections K50A (AUDIO IN), K30B (AUDIO IN1)
A/J
[DIGITAL]
Check the connections K8001 (HDMI1), K8002 (HDMI2)
[ANALOG]
J
Check the waveform at pins 1 and 3 of connector [K50A]
Check the waveform at pins 2 and 3 of connector [K30B]
[ANALOG]
A
C heck the cable connection between connectors [J1] - [KA1]
[Common]
J
Check the waveform at pins 5,14,1,12,9 and 10 of IC5002.
[Common]
J
Check the waveform at pins 12 and 13 of IC5001.
[Common]
J
Check the waveform at pins 3, 5, 1 and 7 of IC5003.
[Common]
J
Check the waveform at pins 12 of IC001.
Replace [A]-P.C.Board
A
NG
OK
OK
OK
OK
OK
OK
OK
NG
Follow the section "Built-in speaker check"
NG
Follow the section "AUDIO OUT check"
NG
Check the cable connection securely
NG
J
Check K50A, K30A and peripheral circuits
NG
Replace the cable
NG
J
Check IC5002 and peripheral circuits
NG
J
Check IC5001 and peripheral circuits
NG
J
Check IC5003 and peripheral circuits
NG
J
Check IC001 and peripheral circuits
INF-32