PDP-4271HD
97
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.2.2 PD (POWER DOWN) DIAGNOSIS
Prediction of failure symptoms when a PD (power-down) is generated
How to distinguish which connector is disconnected
LED Flashing
Count
PD Circuit
Checkpoint
Main Cause
2
Power supply PD
POWER SUPPLY Unit
Failure in the POWER SUPPLY Unit
3
SCAN PD
SCAN A, B Assy
SCAN IC is damaged (short-circuiting between VH and GNDH)
Y DRIVE Assy
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
4
IC5V PD
SCAN A, B Assy
SCAN IC is damaged (short-circuiting between IC5V and GNDH)
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
6
Y DCDC PD
Y DRIVE Assy
Abnormality in the VOFS DC/DC converter
Abnormality in the VPRST DC/DC converter
Abnormality in VC_15V DC/DC converter
7
Y SUS PD
Y DRIVE Assy
Abnormality in the DK module
Abnormality in the control signal line
8
Address PD
ADDRESS Assy
Short-circuiting of Vadr
TCP damaged
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
Assy
Connector
To which Assy the Connector
is Connected
Frequency of LED
Flashing
Screen Display
X DRIVE Assy
CN1001
DIGITAL Assy
11 (XDRIVE)
–
CN1201
POWER SUPPLY Unit (ADR system power)
–
White (left half of the screen)
CN1201
POWER SUPPLY Unit (drive system power)
12 (X-SUS)
–
CN1203
ADDRESS Assy
8 (ADR)
–
Y DRIVE Assy
CN2001
DIGITAL Assy
3 (SCAN)
–
CN2350
POWER SUPPLY Unit (drive system power)
3 (SCAN)
–
CN2350
POWER SUPPLY Unit (ADR system power)
–
White (right half of the screen)
CN2351,
CN2352
ADDRESS Assy
8 (ADR)
–
CN2401,
CN2402
SCAN A, B Assy
4 (SCN-5V)
–
SCAN A, B Assy
CN2701,
CN2801
Y DRIVE Assy
4 (SCN-5V)
–
ADDRESS Assy
CN1501
DIGITAL Assy
8 (ADRS)
–
CN1502,
CN1502
X DRIVE Assy,
Y DRIVE Assy
8 (ADRS)
–
Содержание PDP-4270HD
Страница 20: ...PDP 4271HD 20 1 2 3 4 1 2 3 4 C D F A B E 2 6 PANEL CHASSIS SECTION 1 2 3 6 4 5 8 8 8 8 8 8 9 13 7 10 12 11 14 ...
Страница 55: ...PDP 4271HD 55 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 189: ...PDP 4271HD 189 5 6 7 8 5 6 7 8 C D F A B E Block Diagram R2S11002AFT MAIN ASSY IC4701 AV SW ...
Страница 190: ...PDP 4271HD 190 1 2 3 4 1 2 3 4 C D F A B E Block Diagram R2S11001FT MAIN ASSY IC4901 Component SW IC ...