Power Down Of Failure Analysis - Pioneer PDP-507CMX Service Manual

1

5.2.2 POWER DOWN OF FAILURE ANALYSIS

Prediction of failure symptoms when a PD (power-down) is generated
LED Flashing
A
PD Circuit
Count
2 Power supply PD
3 SCAN PD
4 IC5V PD
5 Y-DRIVE PD
B
6 Y DCDC PD
7 Y SUS PD
8 Address PD
9 X-DRIVE PD
10 X DCDC PD
C
11 X SUS PD
How to distinguish which connector is disconnected
Assy Connector
CN1001
CN1205
50X DRIVE Assy
D
CN1204
CN1206
CN2001
CN2204
CN2206
50Y DRIVE Assy
CN2205
CN2601
50 SCAN A, B Assy CN2801
E
CN1602,
50 ADDRESS
CN1802
Assy
CN1601,
CN1801
F
116
1
2
Checkpoint
POWER SUPPLY Unit Failure in the POWER SUPPLY Unit
50 SCAN A, B Assy SCAN IC is damaged (short-circuiting between VH and GNDH)
Connectors disconnected between the POWER SUPPLY Unit and the Y DRIVE Assy
50Y DRIVE Assy Connectors disconnected between the DIGITAL and the Y DRIVE Assys
Failure in the VH power
SCAN IC is damaged (short-circuiting between IC5V and GNDH)
50SCAN A, B Assy
Disconnection of the scan-bridge (15-pin) connector
Failure in the photo coupler
50Y DRIVE Assy
Abnormality in the IC5V DC/DC converter
50Y DRIVE Assy Abnormality in the 16.5 V power
Abnormality in the VOFS DC/DC converter
Abnormality in the VPRST DC/DC converter
50Y DRIVE Assy
Abnormality in VC_15V DC/DC converter
Abnormality in the DK module
50Y DRIVE Assy
Abnormality in the control signal line
Short-circuiting of Vadr
50 ADDRESS Assy
TCP damaged
Connectors disconnected between the DIGITAL and the X DRIVE Assys
50X DRIVE Assy
Abnormality in the 16.5 V power
Abnormality in VC_15V power
50X DRIVE Assy
Abnormality in VXNRST power
Abnormality in the DK module
50X DRIVE Assy Abnormality in the control signal line
Connectors disconnected between the POWER SUPPLY Unit and the X DRIVE Assy
To which Assy the Connector
is Connected
50 DIGITAL Assy
POWER SUPPLY Unit (ADR system power)
POWER SUPPLY Unit (drive system power)
50 ADDRESS Assy
50 DIGITAL Assy
POWER SUPPLY Unit (drive system power)
POWER SUPPLY Unit (ADR system power)
50 ADDRESS Assy
50 SCAN A, B Assy
50Y DRIVE Assy
50 DIGITAL Assy
50X DRIVE Assy,
50Y DRIVE Assy
PDP-507CMX
2
3
Main Cause
Frequency of LED
Flashing
11 (XDRIVE)
– White (left half of the screen)
12 (X-SUS)
8 (ADR)
3 (SCAN)
3 (SCAN)
–
White (right half of the screen)
8 (ADR)
4 (SCN-5V)
4 (SCN-5V)
8 (ADRS)
8 (ADRS)
3
4
Screen Display
–
–
–
–
–
–
–
–
–
–
4