Pioneer PDP-506PG - • Power-down diagnosis (defective points)

PDP-506PE
65
5678
56
7
8
C
D
F
A
B
E
OVP : OVER VOLTAGE PROTECT
UVP : UNDER VOLTAGE PROTECT
• 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