Panasonic PT-EZ770T

INF-41
SECTION 1 SERVICE INFORMATION
■ No sound
A/J
[ANALOG]
 ChecktheconnectionsJK4002(AUDIOIN3),JK4003(AUDIO
IN)
[DIGITAL]
 ChecktheconnectionsJK1004(HDMI),JK1007(DIGITAL
LINK,JK1008(DisplayPort)
NG
Check the cable connection securely
J
[ANALOG]
 Checkthewaveformatpins31and32ofconnector[JK4007]
NG
J Replacethe[J]-P.C.Board
A
[ANALOG]
Check the cable connection between connectors [A28] -
[JK4007]
NG
Replacethecable
S
[Common]
Check the waveform at pins 5 and 10 of IC1029.
NG
A Check IC1016, IC1100 and peripheral circuits
A
[Common]
Check the waveform at pins 2 and 13 of IC1029.
NG
A Check IC1029 and peripheral circuits
A Replace[A]-P.C.Board
OK
NG
NG
NG
OK
OK
OK
OK
Check each cable connection
No sound with built-in speaker Followthesection"Built-inspeakercheck"
No sound with external speakers
Followthesection"AUDIOOUTcheck"
No sound with built-in and external speakers