Troubleshooting - Pioneer PDP-425CMX Service Manual

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7.1.3 TROUBLESHOOTING

• In a case of a power-supply-related abnormality, such as no power and LEDs' flashing or lighting as an alarm indication:
A
Proceed to "1. Abnormality in power supply" (P138).
• In a case of an image-related abnormality, such as no image on the screen:
Proceed to "2. Abnormality in images" (P140).
• In a case of no video loop output (in a model for industrial use):
This is caused by a failure in the MAIN PWB.
• In a case of an audio-related abnormality, such as no sound:
Proceed to "3. Abnormality in audio" (P148).
• In a case when a remote control unit does not function:
B
Proceed to "4. Failure of a remote control unit" (P152).
Note:
• If symptoms persist after replacement of parts, such as ICs, following the diagnosis results of this failure-analysis chart, it is
recommended to replace the whole PC board, as short-circuiting or breaking of printed wiring of board patterns is suspected.
• In this failure-analysis chart, a connector is expressed either by its circuit number (CN****) or by its name.
The correspondence of a circuit number to a connector name is shown in the table below:
(E.g.: SW connector on the MAIN_PWB is CN9011)
Circuit No.
C
MAIN_PWB KEY_PWB COMM_SLOT_IF SENB_PWB
CN9011 CN2201
−
CN9010
−
CN9501
− −
− −
− −
− −
−
CN9008
D
−
CN9003
−
CN9004
−
CN9006
−
CN9007
−
CN9012
−
CN8501
−
CN8502
−
CN9001
E
* When the Power-down is occured as the key-lock is effective.
• Please pull out the AC-plug, and make the state to stand-by mode.
• The lock is cancelled when the key-lock button is pressed for 5 seconds.
F
128
1
2
SENC_PWB
− −
−
CN2302
− −
−
CN1001
− −
− −
−
CN2301
− −
− −
− −
− −
− −
− −
− −
− −
− −
PDP-425CMX
2
3
SEND_PWB LED_PWB
− −
− −
− −
− −
−
CN1101
−
CN1201
− −
CN2401
− −
− −
− −
− −
− −
− −
− −
− −
− −
3
4
Connector
Name
AUDIO_PWB
− −
SW
− − −
− −
TM
− −
TM1
− −
TM2
− −
TM3
− −
− −
PV
− −
FA
− −
FB
− −
PM
− −
PN1
− −
PN2
− −
AD1
− −
AD2
−
CN3004 AU
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