VSX-1015-K
113
5
6
7
8
5
6
7
8
C
D
F
A
B
E
7.1.2 HOW TO DIAGNOSE THE AMPLIFIER SECTION
When DC detection worked (MCACC LED flashes for a long
time) in the protection circuit of foregoing section (or there is not
the speaker output, probably only 1CH), failure (damage) of the
power amplifier section is considered.
Because this receiver cannot diagnose the amplifier section by an
electricity state by structure, please diagnose it in the following
steps.
Caution:
When release the state of flashing "MCACC" LED before repair
(see how to release "
1
DC detection" on page 111.), Because
there is the case that the damage progresses when turns the power
on once again, please be careful.
• According to a symptom, perform the following
confirmation beforehand.
1.
Are not Fuse and IC protector opening it?
2-a. When can turn on electricity, confirm that supply voltage of
the point that can measure is appropriate.
2-b. Furthermore, confirm that voltage ((in a no signal) DC and
the appropriate signal output) between GND and R2008-
R2014 on the SP/PS Assy (Either of the amplifier side and
the speaker terminal side is possible) (Or remove either of
CN2101-2104) on the SP/PS Assy. And limit failure CH.
If was able to limit failure CH, diagnose the CH in the following
steps.
• Use the tester basically and check that each part is
not damaged (resistance value / open / short circuit).
About parts with damaged possibility, explain FL ch to an
example in order.
1. R4231, R4232 (ACN7132: 0.047
Ω
, 0.5W chip drain resistor)
IC 4202, IC4203 (SAPM01N: Nch, SAPM01P: Pch output
POWER MOS Tr.) /POWER AMP-L Assy
2. R4219 (ACN7121: 0.18
Ω
.5W
×
2 cement source resistor)
R4217, R4218 (RS1/16S471J: 470
Ω
chip resistor for
protection circuit)
D4201, D4203 (UDZS10B: 10V Zener diode for current
limiting)
D4202, D4204 (1SS355: Small signal diodes same as above)
R4210, R4211 (RS1/16S560J: 56
Ω
chip gate resistor)
R4206, R4207 (RS1/16S101J:100
Ω
chip IC4101 power filter
resistor) /POWER AMP-L Assy
3. IC4201 (PA9010A: Power amplifier with output current bias
Voltage step HIC) /POWER AMP-L Assy
4. Q2231 (2SA1514K) /VH TR Assy
Q2232 (2SC3906K) /VH TR Assy
Q2233 (2SA1837D1) /VH TR Assy
Q2234 (2SC4793D1) /VH TR Assy
1
6
R
LF
R2233
R2234
C2211
C2212
D2232
D2231
R2232
C2231
R2231
C2232
Q2231
Q2232
CMKM-P3X
1
6
1
1
1
13
10
1
10
1
10
1
1
11
LF
R4110
R4103
R4307
R4306
R4102
R4202
C4116
C4216
R4220
R4208
R4501
C4107
D4307
R4314
R4320
D4306
D4305
R4312
R4231
R4232
R4331
R4332
R4482
D4108
R4144
R4145
R4146
R4246
R4245
R4244
D4208
R4346
R4301
R4310
R4308
R4313
R4345
R4344
D4308
Q4102
Q4202
Q4302
Q4101
Q4201
Q4301
R4117
R4118
R4115
C4316
R4116
R4112
R4216
R4215
R4218
R4217
R4315
R4316
R4317
R4318
D4102
D4104
R4205
C4206
C4207
R4311
Q4402
C4117
C4217
C4317
R4207
R4206
D4106
R4114
D4105
D4207
C4212
R4209
R4211
C4202
R4204
R4214
R4212
C4102
R4203
R4323
D4202
D4204
C4313
C4312
R4104
R4111
R4109
R4324
C4327
R4106
R4108
C4112
C4328
D4107
R4325
R4113
C4326
R4483
R4334
R4302
C4213
R4305
C4113
R4309
R4201
D4206
C4306
R4333
R4234
C4106
D4205
R4120
R4233
C4307
R4134
R4101
D4302
R4133
D4304
R4105
R4121
R4210
R4221
R4321
R4327
R4328
R4213
C4302
R4304
R4131
R4303
R4132
Q4401
C4577
R4107
R4577
R4579
R4326
D4101
D4103
D4201
D4203
D4301
D4303
12.AGLS
3.-VH
POWER AMP_L ASSY
4.-VH
5.AMUTE
10.AGL
8.AGSBL
13.LS
7.DC
9.SBL
2.+VH
11.L
6.OL
1.+VH
6.CS
5.CS
4.CS
3.CG2
2.CG1
1.GAMP
1.NC
2.NC
3.GNDU
4.POSI_1
5.POSI_2
6.DC DET
7.OL DET
8.WT
9.NC
10.NC
11.NC
AWX8403
AWX8409
AWX
16
R
2205
Q2233
Q2234
VH TR ASSY
+B
-E
-C
-B
+E
+C
+VH
+B
-VH
-B
+C
AWX8411
-C
J22
CMKM-P3X
16
1
2
12
1
2
1
2
1
5
1
10
12
7
5
6
8
10
3
4
9
1
2
7
5
6
8
10
3
4
9
1
2
1
4
12
4
123
3
1
2
4
5
1
5
3
1
2
4
5
5
3
4
6
7
1
2
Y13B
C2051
C2052
L2001
C2001
R2001
R2018
C2008
C2015
C2011
C2004
R2004
C2010
C2003
R2003
C2012
R2005
C2005
C2009
R2002
C2002
Y11A
Y12A
Y13A
Y8B
C2016
C2018
C2019
C2022
C2021
C2017
R2016
R2015
L2004
L2003
L2002
L2005
C2024
C2013
C2006
R2006
L2006
L2007
R2007
C2007
C2014
R2017
R2008
R2009
R2011
R2012
R2010
R2013
R2014
L2008
C2023
L2009
R2051
R2052
CN2101
CN2102
CN2103
CN2104
CN2003
W2019
CN2004
C2020
CN2111
CN2112
RY2004
RY2003
RY2002
RY2001
RY2005
2005
2001
CN2002
W2040
W2034
W2033
W2024
W2004
W2013
W2022
W2003
W2002
W2025
W2012
W2038
W2036
W2027
W2037
W2031
CN2115
CN2006
W2008
W2016
W2007
W2032
W2030
W2039
W2006
W2029
W2028
W2014
W2015
W2005
W2026
W2021
W2020
W2017
W2023
W2018
W2041
W2001
W2011
W2009
W2010
CN2114
W2042
CN2113
FL
C
SR
NC
FR
RED
BLU
BLK
BLK
BLK
NC
(SBR)
(SBL)
SB
SL
6ch(SB)
7ch(SBL)
7ch(SBR)
6ch(B_SR)
6ch(B_SL)
7ch(SBR)
7ch(G_SBR)
6ch(G_SB)
PS/SP ASSY
HP SW
RY B
GNDST
GNDST
V5.6ST
RY AC
W UP
RY CS
RY HP
RY A
V+12V
V-12V
BOND
HP SW
HP R
HP G
HP L
CMKM-P3X
GNDST
GNDST
V5.6ST
AC RY
W UP
BOND
(7ch)
(7ch)
(6ch)
(7ch)
(6ch)
YELLOW
BLUE
RED
WHITE
J11
14
1
2
12
1
2
1
2
1
5
1
12
1
4
13
1
5
R
1
6
1
1
1
13
NP
11
0
15
NP
11
0
11
0
NP
1
11
R
R
R
R
R
R
R
R
J4104
J4105
W4352
W4308
C4201
IC4202
IC4303
C4108
C4208
C4304
IC4302
W4379
W4368
W4377
CN4402
CN4503
CN4504
Y5B
C4308
C4301
C4406
IC4453
W4361
W4353
W4351
W4365
KN4402
KN4401
CN4501
W4381
W4319
W4301
W4342
W4349
W4383
W4340
W4327
W4344
W4334
W4350
W4364
W4359
W4337
W4335
W4309
W4346
W4310
C4114
W4374
W4307
W4345
W4302
W4347
W4300
W4367
W4320
W4376
W4384
W4382
W4316
W4303
W4369
W4328
W4304
W4329
W4348
W4339
W4355
W4331
W4356
W4306
W4357
W4323
C4101
C4109
C4103
C4209
C4205
C4204
W4358
W4366
C4210
IC4201
W4338
W4371
W4380
C4110
W4341
C4111
J4102
Y3A
C4105
J4101
W4378
W4343
W4313
W4332
W4321
W4385
C4214
W4362
C4203
W4336
C4309
C4305
C4311
C4310
IC4101
W4318
W4325
W4354
W4373
R4119
IC4301
R4219
R4319
C4314
W4315
W4317
W4324
W4326
W4363
C4211
W4333
W4372
IC4203
W4375
C4104
C4303
W4360
Y5A
W4312
W4370
Y5C
W4311
J4103
W4322
IC4102
W4305
IC4103
W4330
CN4502
C4401
C4402
R4573
Y3B
Y1
PBD001A
PBD001A
PBD001A
PBD002A
PBD002A
PBD002A
PBD002A
9.SBL
13.LS
11.L
8.AGSBL
10.AGL
+55V
+55V
-55V
+55V
5.AMUTE
7.DC
12.AGLS
6.OL
4.-VH
3.-VH
2.+VH
-55V
1.+VH
-55V
Y5
RED
BLU
BLK
PPL
ORG
GRY
POWER AMP_L ASSY
A
B
1.GAMP
2.CG1
3.CG2
4.CS
5.CS
6.CS
11.NC
10.NC
9.NC
8.WT
7.OL DET
6.DC DET
5.POSI_2
4.POSI_1
3.GNDU
2.NC
1.NC
CMKM-P3X
CMKM-P3X
CMKM-P3X
CMKM-P3X
CMKM-P3X
CMKM-P3X
CMKM-P3X
CMKM-P3X
1
1
1
1
6
1
1
1
1
13
11
0
11
0
11
0
11
1
1
11
SIDE A
SIDE B
VH TR
ASSY
AA
SIDE A
SIDE A
SP/PS ASSY
AB
SIDE B
POWER AMP-L ASSY
S
Q2231
Q2232
Q2233
R2014
R2013
R2011
R2012
R2010
R2008
R4219
R2009
CN2103
CN2104
CN2101
CN2102
Q2234
IC4101
IC4203
IC4202
R4207
R4206
R4231
R4217
R4218
R4232
R4210
R4211
D4204
D4203
D4202
D4201
IC4201