Pioneer f-502 Service Manual page 118

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
3
SCAN
Y DRIVE Assy
DIGITAL Assy
SCAN Assy
4
SCN-5V
Y DRIVE Assy
Y DRIVE Assy
5
Y-DCDC
DIGITAL Assy
6
Y-DCDC Y DRIVE Assy
7
Y-SUS Y DRIVE Assy
ADDRESS Assy
8
ADRS
DIGITAL Assy
X DRIVE Assy
Y DRIVE Assy
X DRIVE Assy
9
XDRIVE
DIGITAL Assy
10
X-DCDC X DRIVE Assy
11
X-SUS X DRIVE Assy
PDP4280HD, PDP5080HD
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
15VDD UVP 15VDC/DC
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
CN1601, CN1602, CN1801, CN1802
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
Possible Defective Part
Q1219,Q1220,Q1221,
Q1222,Q1223,Q1224,Q1201
Q2217,Q2218,Q2219,
Q2221,Q2222,Q2223
SCAN IC
Q1219,Q1220,Q1221,
Q1222,Q1223,Q1224,Q1201
Q2217,Q2218,Q2219,
Q2221,Q2222,Q2223
IC2601,D2604
Q2554,D2558
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
Q2334
D2606,Q2710,Q2711
D2602,Q2604,R2610
Q2572
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
Q2334
Q2705,Q2702
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
Q2334
Q2706,Q2703
Q2320,Q2321,Q2322,Q2323,
Q2324,Q2325,Q2330,Q2332,
Q2334
Q2707,Q2704
Q2106,Q2107,Q2108,Q2110,Q2112,
D2104,D2105,D2108,D2109
IC1651 to IC1656, IC1851 to IC1855
Q1731,Q1741,Q1751,Q1761,Q1771,Q1781,Q1931,Q1941,Q1951,
Q1961,Q1971,(D1731,D1741,D1751,D1761,D1771,D1781,D1931,
D1941,D1951,D1961,D1971,R1714 to R1719,R1914 to R1918)
C1711,C1911,(R1714 to R1719,R1914 to R1918,R1735,R1745,R1755,
R1765,R1775,R1785,R1935,R1945,R1955,R1965,R1975,D1731,D1741,
D1751,D1761,D1771,D1781,D1931,D1941,D1951,D1961,D1971)
L1201,R1217
Q1402
Q1403,Q1404,IC1401
Q1301,Q1303
Q1405,Q1406,IC1402
Q1302,Q1304
Q1108,Q1109,Q1110,Q1112,
D1106,D1107,D1110,D1111
118
Remarks
VSUS-PSUS and SUSOUT-
SUSGND are short-circuited.
VSUS-SUSOUT and SUSOUT-
SUSGND are short-circuited.
VSUS-PSUS and SUSOUT-
SUSGND are short-circuited.
VSUS-SUSOUT and SUSOUT-
SUSGND are short-circuited.
LMSK is short-circuited.
LMSK is short-circuited.
LMSK is short-circuited.
LMSK is short-circuited.
Vadr is short-circuited (TCP,etc.).
Each TCP unit.
Between ADR_B and Vadr is
short- circuited.
Each resonance block unit.
ADR_B capacitor is short-circuited.