Zenith C27A25, Service Manual

Page: 54 / 59

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.
ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT
A
B
C
D
E
F
G
1 2 3 4 5 6 7 8 9 10
6-7 XC SHEET 7 CM154
Jack and Switch Circuit
E
B
C
E
B
C
E
B
C
E
B
C
E
B
C
5
1
2
3
4
5
1
2
3
4
E
B
C
E
B
C
27
28
29
30
31
32
33
34
35
36
37
38
26
25 24
23
22
21
20
19
18
17
16
15
39
40
41
42
43
44
45
46
47
48
14
13
12
11
10
9
8
7
6
5
4
3
2
1
+9V
SW
1
2
3
4
5
6
7
11
10
9
8
+9V
SW
+9V
SW
+9V
SW
16
15
14
13
12
1
2
3
4
5
6
7
11
10
9
8
.001
50V
330
0.1uF
16V
9.1V
1K
5.6K
PROV
470uF
16V
TUNE
+5V
50V
1uF
330
12K
100K
10K
100
3.9K
50V
4.7uF
50V
2200pF 50V
2200pF
68K
50V
1000pF
D-12
SHT.9
C-COMB
100
100uF
50V
100
100
100
0.1uF
16V
SHT.10
SHT.5
SHT.3
SCL
390
SHT.10
SHT.5
SHT.4
SHT.3
SDA
G-1
SHT.5
AGC
A-12
SHT.4
SCL1
A-12
SHT.4
SDA1
1k
220
220
B-1
SHT.4
SD-PIP
180uH
1.5K
470
25V
.01
16V
100uF
C-12
SHT.4
AFC2
V
+33
50V
10uF
50V
1000pF
10uH
50V
1000pF
16V
470uF
TUNE
+5V
50V
1000pF
16V
100uF
F-1
SHT.5
IF
TUNE
+5V
PROV
50V
1000pF
PROV
V
+33
33V
270
150
5.6K
220
5.1V
F-12
SHT.10
CV-PIP
5.1V
0.1uF
16V
56uH
0.001
50V
E-1
SHT.3
RIGHT-SW
PROV
E-1
SHT.3
LEFT-SW
0.1uF
16V
C-12
SHT.6
VM-OUT-R
47
C-12
SHT.6
VM-OUT-L
0.1uF
16V
E-12
SHT.9
Y-COMB
10K
100
75
5.6K
47
7.5V
47
47
75
PROV
PROV
PROV
PROV
F-12
SHT.9
CV-COMB
Y
C
Y/C
EXT-R
EXT-L
VID-IN
VMO-L
VMO-R
A-19267 PROV
75
75
5.6K
47
5.1V
75
PROV
9.1V
PROV
47
Y
C
Y/C
EXT-L
VID-IN
EXT-R
A-19268
18uH
SWF
+9V
75
16V
47uF
1K
50V
10uF
50V
10uF 33V
50V
12pF
50V
4.7uF
50V 1uF
50V 10uF
PROV
F-12
SHT.5
TV-IN
E-12
SHT.5
C-OUT
D-12
SHT.5
VIDEO-SYNC
D-12
SHT.5
Y-OUT
50V
1uF
SHT.4
B-1
Y-MICRO
50V 1uF
50V
10uF
50V 0.01
50V 0.01
150
PROV
50V 1uF
680
1k
10uH
0
1K
0.001
50V
SWF
+9V
SWF
+9V
150
SHT.5_G-12
COMP-AUD2
SWF
+9V
0.1uF
16V
120
1K
220
1K
221-01438
TRAP
ROUT1
VOUT1
LOUT1
CIN1
BIAS
YIN1
MUTE
VCC
VOUT2
ROUT2
YOUT
LOUT
COUT
DC-OUT
SDA
SCL
ADR
RV4
V4
LV4
S-3
S2-3
C3 RV3
Y3
LV3
V3
S-2
N/C
C2
RV2
Y2
LV2
V2
S-1
S2-1
C1
RV1
Y1
LV1
V1
RTV
TV
LTV
COUNT1
GND
YOUT1
C2909M
R1289
C2803M
Q1321
ZD2903
R2925
TP1301
R2800
L2902
C1230
C1320
R1320M
R1323M
R1322M
R1326M
R1321M
R1324M
C1322
C1324M
C1323M
R1325M
C1321M
WT1200
Q1320
R1304M
C1231
R1216M
R1302M
R1218M
C2805M
R2929M
R2932M
R2935
R2934M
TP1300
L2901
R1300M
R1301M
Q1300
C1307M C1306
C1304
C1305M
L1300
C1303M C1302
C1301M C1300
Q2900
L1230
C1232M
C2918M
ZD1200
R2933M
R2903M
R2801
Q2903
R2931M
ZD2905
ZD2900
C2800M
L1302
C2910M
C2921M
C2804M
R2918
C2802M
R2921M
R2930
R2911
R2803
R2915M
1CV
ZD2904
R2920
R2917
R2912
C2922M
C2920M
C2923M
C2924M
JP001
C2925M
R2914
R2910
R2802
R2916M
ZD2901
R2909
TP1204
C2926M
ZD2906
C2917M
R2906M
JP002
L2900
R2913
VC1
C2913
R2907M
C2906
C2907
ZD1300
C2914M
C1233
C2905
C2904
C2927M
C2903
C2908
C2901
C2916M
C2915M
R2901M
C2900M
C2902
R2908M
R2905M
L1301
R2904M
R2919
C2911M
R2902M
Q2902
Q2901
C2801M
R2900M
R2927M
R2926M
WT1300
R2928M
IC2900
121-1311A
279-00018A
175-2770
121-1310A
121-1311A
121-1310A
0.5W
121-1310A
103-
103-279-10A
279-00015A
103-279-10A
279-00018A
0.5W
121-1310A
121-1310A
175-2705
This schematic applies to
the following XC models:
C27C35T(F)
C27C41T(F)
LGC29C35TM