FUNAI Sylvania LC260SS1 Service Manual page 53

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
P-ON+5.0V GND J318
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
AOUT-R J129
SPDIF J158
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
SCL J122
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
JK742
JK733 JK741
PROTECT1
J333
GND
J332
JK732
GND
JK721
J 8 K 1 7 J 8 K 2 7 JK722
J330
A-GND
J329
A-GND
ALL+3.3V
J339
R819 GND
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
8
5 PROTECT1
J244
ALL+3.3V D807
C771
A-GND
9 J355
16
C816
9
GND J351 C656
R689
C657
R688
BC802
Q642
R687
D801
CN801
BC803
2 1
9
CL701B
F E
CN201
10
2
Q401
11 1
J213
D421 P-ON+3.3V
D411
PROTECT1 J155
D665
D414
J250
LCD-6.8V
R405
D404
C219
IC201
4 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
LCD+15.8V +6.7V J219
J208
+Vtune
J142
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
44 A-GND IC801
23
A-GND
J301 J344
GND
J345
GND
J346
GND
SP+13V J264
1 22
SP+13V J265
MUTEX J152
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
Q212
OE2
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
6 CN101 1
D805
CN802
B
4 4 4
D651
D650
COLD
R655
HOT
R615
R614
3 3 3
D608
C605
D620
2
LINE-FL-SHORT
JS602
JS601 1
LINE-FL-SHORT
2 1
A
BA01A0F01023