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SERVICE PROCEDURE-3
6. Replacing Power Amplifier Parts
When a power amplifier of certain channel is broken and goes into Protect mode, the following parts in the channel
must be replaced at the sametime, because these parts get damage in most cases.
<Note>
Idling current readjustment is necessary for after repairs.
Center
Sorround R
BACLA-0228
BACLA-0230
Q6012, Q6022
Q6014, Q6024
Q6032, Q6042
Q6034, Q6044
Q6102, Q6112
Q6104, Q6114
C6012, C6022
C6014, C6024
R6052, R6072
R6054, R6074
R6252, R6262,
R6254, R6264,
R6272, R6282,
R6274, R6284,
R6292, R6302,
R6294, R6304,
R6312
R6314
Q6052, Q6062,
Q6054, Q6064,
R6402, R6412
R6404, R6414
[e.g.]
In case Front Lch
Refer to "SCHEMATIC DIAGRAMS-1
AMP1 (VOLTAGE POWER AMP) SECTION"
BACLA-0226
U0080
AMPLIFIER PC BOARD
(1/4W)
15
+B1L
R5230
1.1V
+BL
R5250
68K
NFL
R5260
270K
C6000
R6110
102J
10K
IDLING
ADJ.
-BL
-1.1V
(1/4W)
15
-B1L
R5240
BACLA-0226, BACLA-0229, BACLA-0231 and BACLA-0233 are electrically and mechanically full-compatible with each other,
but idling current readjustment is necessary.
BACLA-0227, BACLA-0228, BACLA-0230, BACLA-0232 and BACLA-0234 are also electrically and mechanically full-compatible
with each other, but idling current readjustment is necessary.
Front
Sorround
High R
Back R
BACLA-0234
BACLA-0232
BACLA-0227
Q6018, Q6028
Q6016, Q6026
Q6011, Q6021
Q6038, Q6048
Q6036, Q6046
Q6031, Q6041
Q6108, Q6118
Q6106, Q6116
Q6101, Q6111
C6018, C6028
C6016, C6026
C6011, C6021
R6058, R6078
R6056, R6076
R6051, R6071
R6258, R6268,
R6256, R6266,
R6251, R6261,
R6278, R6288,
R6276, R6286,
R6271, R6281,
R6298, R6308,
R6296, R6306,
R6291, R6301,
R6318
R6316
R6311
BAAMP-0191
Q6058, Q6068,
Q6056, Q6066,
Q6051, Q6061,
R6408, R6418
R6406, R6416
R6401, R6411
L
60.1V
R6310
10
(1/4W)
3
2
1
0.6V
1
-0.6V
2
3
4
5
-60.2V
Sorround
Front R
Front L
Back L
BACLA-0226
BACLA-0231
Q6010, Q6020
Q6015, Q6025
Q6030, Q6040
Q6035, Q6045
Q6100, Q6110
Q6105, Q6115
C6010, C6020
C6015, C6025
R6050, R6070
R6055, R6075
R6250, R6260,
R6255, R6265,
R6270, R6280,
R6275, R6285,
R6290, R6300,
R6295, R6305,
R6310
R6315
Q6050, Q6060,
Q6055, Q6065,
R6400, R6410
R6405, R6415
Refer to "SCHEMATIC DIAGRAMS-2
AMP2 (FINAL STAGE) SECTION"
BAAMP-0192
U0021
AMPLIFIER PC BOARD
L
+B1L
1
L6000
R6080
10
1
2
3
NFL
4
5
R6090
10
1
L6010
TTA0002(Q)
-B1L
TX-NR3007
Front
Surround L
High L
BACLA-0233
BACLA-0229
Q6017, Q6027
Q6013, Q6023
Q6037, Q6047
Q6033, Q6043
Q6107, Q6117
Q6103, Q6113
C6017, C6027
C6013, C6023
R6057, R6077
R6053, R6073
R6257, R6267,
R6253, R6263,
R6277, R6287,
R6273, R6283,
R6297, R6307,
R6293, R6303,
R6317
R6313
BAAMP-0192
Q6057, Q6067,
Q6053, Q6063,
R6407, R6417
R6403, R6413
IPRO
Q6050
TTC0002(Q)
R6180
56K
P6070
SPL
ID+
ID-
R6210
VPRO
47K
D6000
R6230
VOLH
47K
1SS133
Q6060
+60V
1
P6240A
18pvc
-60V
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