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Power Supply CBA & Jack CBA Bottom View
Because a hot chassis ground is present in the power supply
circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly,
when troubleshooting this type of power supply circuit,
a variable isolation transformer is required.
Power Supply CBA
WF6
PIN 19 OF
CN302
WF5
J325
GND
PIN 17 OF
AMP-R
J126
CN302
AMP-L
J125
AOUT-R
J123
WF4
AOUT-L
J124
J106
PIN 15 OF
GND
J318
P-ON+5.0V
CN302
J316
GND
J304
A-GND
GND
J303
WF7
PIN 13 OF
CN302
WF2
PIN 8 OF
GND
J343
CN302
GND
J347
LED1
J177
WF3
WF3
PIN 6 OF
PIN 6 OF
SPDIF
J158
AOUT-R
J129
CN302
CN302
J127
AOUT-L
J128
S-SW
JK731
J109
WF1
WF1
RCV-IN
J267
PIN 4 OF
PIN 4 OF
P-ON+5.0V
CN302
CN302
GND
J314
JK841
J256
P-ON+5.0V
BC841
J120
SPDIF
J236
P-ON+3.3V
J130
SEL-R
J132
SEL-L
J135
P-ON-H1
LED-R
J254
J146
FROM LED-R
1
CL701A
Jack CBA
JK751
1
G
CAUTION !
Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F601) is blown , check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
D420
D401
R402
BC301
TUNER+5V
J222
J122
SCL
D412
SDA
J121
C653
J225
P-ON+5.0V
Q640
PROTECT2
PROTECT1
Q641
C654
R682
J229
R684
+6.7V
R698
TU301
+6.7V
R693
R691
C655
D645
GND
J338
GND
J322
J154
JK741
JK742
JK733
PROTECT1
J333
GND
J332
JK732
JK721
GND
JK871
JK872
JK722
J330
A-GND
J329
A-GND
ALL+3.3V
GND
J339
R819
J340
JK711
GND
A-MUTE
Q873
LCD+15.8V
Q841
ERR/WARNING
P-ON+3.3V
J118
PC-A-IN
A-MUTE
J136
J266
J246
4
1
P-ON+3.3V
P-ON+3.3V
J263
P-ON+3.3V
GND
J331
IC771
8
J148
1
5
8
PROTECT1
J244
C771
ALL+3.3V
D807
A-GND
J355
9
16
C816
9
GND
C656
J351
R689
C657
R688
BC802
Q642
R687
D801
CN801
BC803
2 1
9
CL701B
F
E
CN201
10
2
Q401
11
1
J213
P-ON+3.3V
D421
D411
PROTECT1
J155
D665
D414
J250
LCD-6.8V
R405
D404
C219
4
IC201
1
+3.5Vfor1.8V
J241
J232
8
5
+36V
J242
LCD+15.8V
+Vtune
J227
P-ON-H1
J230
Q204
J216
LCD-6.8V-SW
J226
Q203
J119
LCD+15.8V
R210
C647
J223
+6.7V
J219
LCD+15.8V
J208
J142
+Vtune
P-ON+3.3V
J234
J240
R661
P-ON+3.3V
J239
+3.5Vfor1.8V
D210
D417
C650
R244
C652
R657
J237
C224
D666
Q637
R242
J248
LCD+15.8V
D209
GND
J308
R678
GND
J309
Q632
GND
J313
IC631
R697
R696
J238
R666
J131
J218
R632
D659
R665
J249
R664
R663
J262
D644
R821
D806
C819
L803
J161
SP+13V
FH601
L804
SP+13V
J224
J342
IC801
44
A-GND
23
A-GND
J301
J344
GND
J345
GND
J346
GND
SP+13V
J264
1
22
SP+13V
J265
J152
MUTEX
J151
ERR/WARNING
D
C
10-16
CAUTION ! :
For continued protection against risk of fire,
replace only with same type 4 A, 125V fuse.
4A/125V
ATTENTION : Utiliser un fusible de rechange de même type de 4A, 125V.
NOTE:
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
JS202
OE2
Q212
J204
D405
LCD+24V
R249
Q210
R204
D202
D206
Q208
+6.7V
J231
R235
D207
R250
R253
D204
C637
D636
D638
D634
D635
D610
C632
T601
D632
R613
C609
R610
R611
D606
D612
BC601
BC602
Q601
D646
Operation
J603
C606
C642
D602
LINE-FL-SHORT
FH602
JS603
JS604
LINE-FL-SHORT
F601
4A/125V
CN101
1
6
D805
CN802
B
D651
4
4
4
D650
COLD
R655
HOT
R615
R614
3
3
3
D608
C605
D620
2
LINE-FL-SHORT
JS602
1
JS601
LINE-FL-SHORT
2
1
A
BA01A0F01024
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