PDP-425CMX
126
1
2
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4
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C
D
F
A
B
E
• Diagnosis of the shutdown
Frequency of Flash-
ing of Green LED
Shutdown Operation
Defective Assy
Reason for Shutdown
Point to be Checked
Possible
Defective Part
Remarks
1
Communication failure in panel
drive IC
DIGITAL
Failure in panel drive IC or defective peripheral circuits
SQ ASIC BLOCK, PANEL FLASH BLOCK
IC3401,IC3151
DIGITAL
Writing failure of panel drive IC
IC3401,IC3151
After turning the unit on again, check if the data on the version can be
read with the QS1 command.
2
IIC communication failure of the
module (Check the shutdown
subcategory on the Factory
menu.)
DIGITAL
Communication failure in EEPROM (4k) or defective peripheral circuits
MODULE UCOM BLOCK
IC3156
DIGITAL
Failure in the DAC IC or defective peripheral circuits
MODULE UCOM BLOCK
IC3157
DIGITAL
Communication failure in EEPROM (2k) or defective peripheral circuits
OB AUDIO
IC3161
DIGITAL
Failure in Temp Sensor IC or defective peripheral circuits
OB AUDIO
IC3158
3
Abnormality in RST2
DIGITAL
Defective DC-DC converter
DIGITAL DD CON BLOCK
U3601, IC3401
Check if 3.3V and 1.2V are activated. (not short-circuited) No 8-V power input
to the DC/DC converter. A defective IC3401 may be the cause.
DIGITAL
Failure in the RST IC
PANEL FLASH BLOCK
IC3302,IC3304
POWER SUPPLY
12V power not booted
POWER SUPPLY
4
Panel having higher temperature
PANEL SENSOR
Failure in thermister or defective peripheral circuits
Temperature sensor
IC3158,IC3151
If this pattern of flashing occurs even when the panel temperature has not clearly reached the
specified one, possible causes are a defective IC3158 temperature sensor, defective soldering
of IC3158, broken TEMP1 signal line, and defective soldering between IC3158 and IC3151.
Panel having higher temperature
Surrounding temperature
Sensor temperature 75ºC (TEMP1)
5
Audio failure
Speaker short-circuited
Speaker terminals
Check if the speaker cables are in contact with the chassis, etc.
AUDIO
Defective AMP IC
IC3002
AUDIO
Defective AUDIO CONTROL IC
IC3001
MAIN
Defective buffer
IC5306
AUDIO
Disconnection of connector
CN9001-CN3004
Check if the connector is disconnected or not securely connected.
6
Communication failure in module
microcomputer
DIGITAL
Communication failure of the module microcomputer or defective peripheral circuits
MODULE UCOM BLOCK
IC3151
Check if the communication lines (TXD0/RXD0) are shorted or opened.
Failure in writing in the module microcomputer
MODULE UCOM BLOCK
IC3151
Disconnection of connector
CN9001-CN8502
Check if the connector is disconnected or not securely connected.
7
Not used
8
IIC communication failure
MAIN
Communication failure of EEPROM
IC9508
VIDEO SLOT 1 or 2
Communication failure of VIDEO SLOT IC1 (CVBS)
IC1 (Y/C) BLOCK
IC6255
VIDEO SLOT 1 or 2
Communication failure of VIDEO SLOT IC1 (Y/C)
IC1 (CVBS) BLOCK
IC6107
MAIN
Communication failure of A/D Main (A system)
IC6501
MAIN
Communication failure of A/D Sub (Bsystem)
IC6701
MAIN
Communication failure of IC6
IC6301
VIDEO SLOT 1 or 2
Communication failure of VIDEO SLOT EEPROM
IC6257
AUDIO
Communication failure of AUDIO CONTROL IC
IC3001
MAIN
Communication failure of extension I/O2
IC5304
9
Not used
10
Fan failure
FAN
Failure in the fan motor or fan stopped by attached dust.
Disconnection of connector
CN9003, CN9004, FAN wires (FA,FB) relay part
Check if the connector is disconnected or not securely connected.
11
Unit having higher temperature
SENB, SENC, SEND
Use in high temperature environment
Surrounding temperature
Sensor temperature is a high temperature
SENB, SENC, SEND
Defective the sensor IC
Temperature sensor
IC1001, IC1101, IC1201
Disconnection of connector
CN1001, CN1101, CN1201, CN9501, wires
Check if the connector is disconnected or not securely connected.
12
Not used
13
Failure of the power supply voltage
POWER SUPPLY
Power failure
Pins 1 to 3 of PN1
POWER SUPPLY
Check if 3.3V is activated. (not short-circuited)
14
Not used
15
Others
Failure of 12V line circuit
Check the short-circuit point of 12V line circuit.
Failure of 13.5V and 6.5V line circuits
Check the short-circuit points of 13.5V and 6.5V line circuits.
Summary of Contents for PDP-42MXE10
Page 9: ...PDP 425CMX 9 5 6 7 8 5 6 7 8 C D F A B E ...
Page 27: ...PDP 425CMX 27 5 6 7 8 5 6 7 8 C D F A B E ...
Page 37: ...PDP 425CMX 37 5 6 7 8 5 6 7 8 C D F A B E ...
Page 129: ...PDP 425CMX 129 5 6 7 8 5 6 7 8 C D F A B E ...
Page 132: ...PDP 425CMX 132 1 2 3 4 1 2 3 4 C D F A B E MAIN PWB CONNECTOR WAVE FORM POINT SIDE B ...