U01 Amplifier Pc Board - Integra DTR-7.9 Service Manual

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ADJUSTMENT PROCEDURE-2
IDLING CURRENT ADJUSTMENT
<Fig-1>
U01
AMPLIFIER PC BOARD
(NAAMP-9477)
SR
Trimming
resistor
R6044
B C E Q6016 B C E B
Q6056 Q6066 Q6054
J6074 J6080
12 25
J6076
J6079
10
J6077 J6083
12 25
J6073
30
J6078
J6075
R6106
J6042 ID+
P6086
L6006
ID-
Q6106
TE
L 13942296513
Q6116
R6086
BIAS
R6056 R6296
R6256
P6006B
R6276
R6286
R6076
SBR
C6706
J6020
7
JL6606B
ID+
ID-
P6086
Test
SBR
point
R6046
Trimming
resistor
www
.
http://www.xiaoyu163.com
ID+
R Test
ID- point
P6081
P6084
Trimming
Test ID+
resistor
point
ID-
R6041
C E B C E B C E B
Q6014 Q6011
Q6064 Q6051
Q6061
J6082
J6089 J6091
10 25
10
J6085
J6088
27 7 27
J6093
J6086
10 25 12
J6087
J6081 J6090
30 7
J6084
30 30
R6101
R6104 J6044
J6048
25 12
R6094
ID+
R6294
25
R6254 L6001
J6045
J6049
R6274
R6284
Q6101 Q6111
R6074
ID-
P6084
Q6114
Q6104
7
J6047
BIAS BIAS
R6291
E5507A P6001B
P6004B R6251
R6054
R6271
R6281
R6071
R
Q6076
SR
C6056
? ?
NCAMP-9477 2
25139477B
RED
JL6402B
P6901A
x ao
y
i
http://www.xiaoyu163.com
8
Test
C
point
P6082
Trimming
Trimming ID+
resistor
resistor
ID-
R6040
R6042
C E B C E B C E B C
Q6012
Q6052 Q6062 Q6050
J6092 J6102 J6106
J6107
10 25
25
J6099 P6902B J6103
J6095
J6112
27
10 25 7
J6104
J6098
J6096 J6111
7 25
25
J6105
J6097 J6101
27 30 7
J6094 J6100 R6102 J6109
P6901B
17
15 27
J6060
J6050 J6055
7
25 20
J6053 J6054 J6059
20 7
JL6600A
J6056
J6061
Q Q
R6091
3 6 7 1 3
R6092 Q6100
Q6102 Q6112
L6002
L6012
L6011
J6058
7
7
J6052
ID+
C6022
ID-
P6081
ID+
ID-
BIAS
R6292
R6252
R6050
P6002B
R6272
BIAS
R6282
R6072
C
Q6072
C6052
C6051
P5510A
JL6620A
P5510C
C6901
JL6603A
C6902
P6900B
u163
.
2 9 9 4 2 8
L SL
ID+
ID-
P6080
Trimming
Test
resistor
point
R6043
E Q6010 B C E B C E B C
Q6013
Q6060 Q6053 Q6063
J6116
J6119 J6124
25
10 10
J6114 J6122
30 30
7
J6121
J6113
30 30
10
J6117
J6108 J6118
27 7
R6103
J6110 J6115
10 25
R6100 P6083
J6063 J6066
25 25
J6062
27
P6080
ID+
ID+
R6090 ID- ID-
1 5 0 5 8 2 9 9 4
Q6110
Q6103 Q6113
L6010
7
J6065
C6020
BIAS
P6000B
E5509A R6053 P6005B
R6293
R6253
R6273
SL
P6003B
R6283
R6073
L
R6290
R6250
C6050
R6270
R6280
R6070
7
J6128
BLUE
J6019
30
J6018
30
D6901
P6902A
+ - +
AC
30
J6008 D6903
30
J6007
C6912
C6913
J6012
J6011
J6004
30 C6915
J6006
J6005
R6197
C6916
JL5514A
Trimming
resistor
R6045
m
co
DTR-7.9
9 9
ID+
ID-
P6083
Test
point
E B C E B C E
Q6015
Q6065
Q6055
27
J6127
J6126
J6123
30 7
J6120
22 12
R6105
L6005 J6125
P6085
ID+
ID-
2 8 9 9
Q6115
Q6105
BIAS
R6055
R6295
R6255
R6275
R6285
R6075
Q6075
SBL
C6055
J6129
7
-
AC
30
J6010
30
J6009
10
J6014
15
J6013
P6950
15
15
15
15
15A 250V
ID+
SBL
ID-
P6085
Test
point