PDP-6071PU
104
1234
1234
C
D
F
A
B
E
5.2.2 POWER DOWN OF FAILURE ANALYSIS
• List of detection of disconnected connectors
PD (Power-down) diagnosis
Assy Name Connector Connection Assy
Number of
LED flashes
Screen Display
60 X DRIVE
CN1001 60 DIGITAL Assy 9 (X DRIVE)
CN1204 POWER SUPPLY Unit (ADR system) − White screen
CN1206 POWER SUPPLY Unit (drive system) 10 (X-DCDC)
CN1201, CN1203 ADDRESS Assy 8 (ADR)
60 Y DRIVE
CN2001 60 DIGITAL Assy 3 (SCAN)
CN2351 POWER SUPPLY Unit (drive system) 3 (SCAN)
CN2353 POWER SUPPLY Unit (ADR system) − White screen
CN2354, CN2356 60 ADDRESS Assy 8 (ADR)
CN2401, CN2402 60 SCAN Assy 4 (SCN-5V)
60 SCAN CN2901, CN2801 60 Y DRIVE Assy 4 (SCN-5V)
60 ADDRESS
CN1602, CN1802 60 DIGITAL Assy 8 (ADRS)
CN1601, CN1801 60 X/Y DRIVE Assy 8 (ADRS)
Prediction of failure symptoms when a PD (power-down) is generated
LED Flashing
Count
PD Circuit Checkpoint Main Cause
2 Power supply PD
POWER SUPPLY Unit
X, Y DRIVE Assy
Failure in the POWER SUPPLY Unit
MSK_MOD is damaged (short-circuiting between VS and GND)
Each Assy
16.5V/ 12V/ 6.5V/ 5.1V short-circuit within one of PCB.
3 SCAN PD
SCAN Assy SCAN IC is damaged (short-circuiting between VH and GNDH)
Y DRIVE Assy
4 IC5V PD
SCAN Assy
SCAN IC is damaged (short-circuiting between IC5V and GNDH)
Connectors disconnected between the POWER SUPPLY Unit and the Y DRIVE Assy
Connectors disconnected between the DIGITAL and the Y DRIVE Assys
Failure in the VH power
Disconnection of the scan-bridge (15-pin) connector
Y DRIVE Assy
Failure in the photo coupler
Abnormality in the IC5V DC/DC converter
5 Y-DRIVE PD Y DRIVE Assy Abnormality in the 16.5 V power
6Y DCDC PD Y DRIVE Assy
MSK_MOD is damaged (short-circuiting of the mask switch)
Abnormality in the VOFS DC/DC converter
Abnormality in the VPRST DC/DC converter
Abnormality in VC_15V DC/DC converter
7Y SUS PD Y DRIVE Assy
Abnormality in the DK module
Short-circuiting of Vadr
TCP damaged
Abnormality in the control signal line
8 Address PD ADDRESS Assy
9 X-DRIVE PD X DRIVE Assy
Connectors disconnected between the DIGITAL and the X DRIVE Assys
Abnormality in the 16.5 V power
10 X DCDC PD X DRIVE Assy
Abnormality in VC_15V power
Abnormality in VXNRST power
11 X SUS PD X DRIVE Assy
Abnormality in the DK module
Abnormality in the control signal line
Connectors disconnected between the POWER SUPPLY Unit and the X DRIVE Assy
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