Panasonic PT-EZ770Z Service Manual page 47

SECTION 1 SERVICE INFORMATION
■ Remote control does not respond (Not respond only from rear side of the projector)
Check the waveform at pin 1 of RM1001 when the remote control
A
button is pressed.
A Replace [A]-P.C.Board
■ Remote control does not respond (Not respond only from front side of the projector)
The signal waveform can be detected at pin 1 of RM3101 when
A
the remote control button is pressed.
A Check the cable connection between [V1] - [A27]
Check the waveform at L1182 when the remote control button is
A
pressed.
A Replace [A]-P.C.Board
■ SERIAL IN does not respond
A Check the cable connection of JK4005 (SERIAL IN)
The signal waveform can be detected at pins 13, 15 and 17 of
A
IC4002 when the serial command is transmitted.
A Check the FPC cable between [J1] - [A28]
The signal waveform can be detected at L1198 and L1199 when
A
the serial command is transmitted.
A Replace [A]-P.C.Board
OK
OK
OK
OK
OK
OK
OK
OK
NG
A Check RM1001 and peripheral circuits
NG
A Check RM3101 and peripheral circuits
NG
Replace the cable
NG
V Replace [V]-P.C.Board
NG
A Connect the connector securely
NG
A Check IC4002 and peripheral circuits
NG
Replace the FPC cable
NG
J Replace [J]-P.C.Board
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