Pd (Power-Down) Diagnosis Of Failure Analysis - Pioneer PDP-4280HD Service Manual

1

5.3.2 PD (POWER-DOWN) DIAGNOSIS OF FAILURE ANALYSIS

A
Prediction of failure symptoms when a PD (power-down) is generated
Red LED
Operating
Defective Assy
Flashing
PD
Count
POWER SUPPLY Unit
X DRIVE Assy
2
POWER
Y DRIVE Assy
SCAN Assy
X DRIVE Assy
B
3
SCAN
Y DRIVE Assy
DIGITAL Assy
SCAN Assy
4
SCN-5V
Y DRIVE Assy
Y DRIVE Assy
5
Y-DCDC
DIGITAL Assy
C
6
Y-DCDC Y DRIVE Assy
D
7
Y-SUS Y DRIVE Assy
ADDRESS Assy
8
ADRS
DIGITAL Assy
E
X DRIVE Assy
Y DRIVE Assy
X DRIVE Assy
9
XDRIVE
DIGITAL Assy
10
X-DCDC X DRIVE Assy
F
11
X-SUS X DRIVE Assy
64
1
2
PD Outline Checkpoint
Failure in the POWER SUPPLY Unit
X SUS BLOCK
VSUS UVP
Y SUS BLOCK
SCAN IC
X SUS BLOCK
VH UVP
Y SUS BLOCK
VH DC/DC converter
Connectors
CN2001,CN2301
disconnection
CN3506
detection
SCAN IC
IC5V UVP
IC5V DC/DC
Connectors
CN2501,CN2502
disconnection detection
CN2001
Connectors
disconnection detection
CN3506
Y MSK BLOCK
VNOFS UVP
VNOFS DC/DC
YPRST Regulator
Vprst UVP
15VDC/DC
15VDD UVP
Y MSK BLOCK
VKOFS1_2 UVP
VKOFS1_2 Regulator
Y MSK BLOCK
VKOFS3 UVP
VKOFS3 Regulator
Y MSK BLOCK
VKOFS4 UVP
VKOFS4 Regulator
Center electric potential
Y RESONANCE BLOCK
detection PD
Vadr LVP ADDRESS RESONACE BLOCK
CN1501,CN1502
Connectors
CN3501 to CN3504
disconnection
detection
CN1202,CN1203
CN2302,CN2303,CN2304
Connectors CN1001
disconnection
detection
CN3505
Connectors
CN1201
disconnection detection
X SUS BLOCK
15VDD UVP
15VDC/DC
VXKOFS1 Regulator
VXKOFS1 UVP
X OFFSET BLOCK
VXKOFS2 Regulator
VXKOFS2 UVP
X OFFSET BLOCK
Center electric potential
X RESONANCE BLOCK
detection PD
UVP: Under Voltage Protect , OVP: Over Voltage Protect
PDP-4280HD
2
3
Possible Defective Part
Q1219,Q1220,Q1221,
VSUS-PSUS and SUSOUT-SUSGND
Q1222,Q1223,Q1224,Q1201
are short-circuited.
Q2217,Q2218,Q2219,
VSUS-SUSOUT and SUSOUT-SUSGND
Q2221,Q2222,Q2223 are short-circuited.
SCAN IC
Q1219,Q1220,Q1221,
VSUS-PSUS and SUSOUT-SUSGND
Q1222,Q1223,Q1224,Q1201
are short-circuited.
Q2217,Q2218,Q2219, VSUS-SUSOUT and SUSOUT-SUSGND
Q2221,Q2222,Q2223 are short-circuited.
IC2601,D2604
Q2554,D2558
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
LMSK is short-circuited.
Q2334
D2606,Q2710,Q2711
D2602,Q2604,R2610
Q2572
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332, LMSK is short-circuited.
Q2334
Q2705,Q2702
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
LMSK is short-circuited.
Q2334
Q2706,Q2703
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332, LMSK is short-circuited.
Q2334
Q2707,Q2704
Q2106,Q2107,Q2108,Q2110,Q2112,
D2104,D2105,D2108,D2109
Vadr is short-circuited (TCP,etc.).
IC1551,IC1552,IC1553,IC1554
Each TCP unit.
Q1631,Q1641,Q1651,Q1661, Between ADR_B and Vadr is short-
circuited.
(D1631,D1641,D1651,D1661,R1614,
R1615,R1616,R1617) Each resonance block unit.
C1611,(R1614,R1615,R1616,R1617,
ADR_B capacitor is short-circuited.
R1635,R1645,R1965,R1665,D1631,
D1641,D1651,D1661,Q1610)
L1201,R1217
Q1402
Q1403,Q1404,IC1401
Q1301,Q1303
Q1405,Q1406,IC1402
Q1302,Q1304
Q1108,Q1109,Q1110,Q1112,
D1106,D1107,D1110,D1111
3
4
Remarks
4