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PDP-506PE
65
5
6
7
8
5
6
7
8
C
D
F
A
B
E
OVP
:
O
VER
V
OLTAGE
P
ROTECT
UVP
:
U
NDER
V
OLTAGE
P
ROTECT
• Power-down diagnosis (defective points)
Number
of Blinks
PD Circuit in
Operation
Defective PCB
Assy
Reason for PD
(Power-down)
Point to be Checked
Possible Defective Part
Remarks
2
POWER
POWER SUPPLY
3
SCAN
50 (43) SCAN A, B
VH UVP
SCAN IC
SCAN IC
VH-GNDH short-circuit
50 (43) Y DRIVE
Y SUS BLOCK
IC2252, IC2253
VSUS-SUSOUT,
SUSOUT-SUSGND short-
circuit
VH DC/DC
IC2502, L2501
Disconnection of cable detected
CN2001, CN2350
50 (43) X DRIVE
VH UVP
IC1202
IC1202
VSUS-SUSOUT,
SUSOUT-SUSGND short-
circuit
4
SCN-5V
50 (43) SCAN A, B
Disconnection of cable detected
CN2401, CN2402
IC5V UVP
SCAN IC
SCAN IC
50 (43) Y DRIVE
IC5V DC/DC
Q2605, R2647
Y SUS BLOCK
R2352
6
Y-DCDC
50 (43) Y DRIVE
VOFS UVP
VOFS DC/DC
Q2606, R2619, R2620
Y SUS BLOCK
IC2252, IC2253, Q2280, Q2281
MSKS-SUSOUT short-circuit
Vprst UVP
Vprst Regulator
Q2531, Q2532, IC2535
7
Y-SUS
50 (43) Y DRIVE
Power-down caused by
detection of middle-point
voltage
Y RESONANCE BLOCK
IC2101
Y SUS BLOCK
Q2221
8
ADRS
50 (43) ADDRESS
Address power-down
ADDRESS RESONANCE BLOCK
D1634
V+ADR-GND_ADR short-circuit
Disconnection of cable detected
CN1501, CN3501-CN3504
9
XDRIVE
50 (43) X DRIVE
Disconnection of cable detected
CN1001
10
X-DCDC
50 (43) X DRIVE
Disconnection of cable detected
CN1201
VRN UVP
VRN DC/DC
Q1323, R1332, R1333
X SUS BLOCK
R1204, Q1272
11
X-SUS
50 (43) X DRIVE
Power-down caused by
detection of middle-point
voltage
X RESONANCE BLOCK
IC1101