A/V Switch - Zenith H19F34DT Series Service Manual

1 2
G
Aux3-L
A3L
TV
Aux3-R
A3R
Luma-Comb (Y-IN)
F
Chroma-Comb (C-IN) CAMPORT-SENSE
Luma Rear (Y-IN)
Y/C-SENSE
Chroma Rear (C-IN)
Luma (Y-IN)
Chroma (C-IN)
E
Composite Video IF
MATRIX/SPEAKER-OUT
Composite Video
"Comb-Filter"
Composite Video
"Rear"
JP1
Composite Video P/L
"Camport"
MATRIX
D
OUT
Matrix-Speaker
M-OUT
Out
Aux1-R
A1R
Y
Y/C
IN
C
Aux1-L
A1L
Composite Video
RIGHT
Switch
C IN
LEFT
IN
This schematic refers to
VIDEO
CL Chassis models IN
H19F34DT
H20F34DT
RIGHT
IN
H25F34DT
B H25F39DT
LEFT
IN
H27F34DT
H27F39DT
H25F36DT
H27F36DT
H32F36DT
A
SR25-3828VD0171B
3 4
+9V
SW
R2911
R2909
22K
22K
R2930
2.2K
R2912 R2910
22K 22K
+9V +9V
SW SWF
L2900
+9VSWF
10µH
C2900
CM2911
100µF
PROV
16V
50V
23
M-OUT M-OUT R2901
24
ZD2901
47
R2902
0DZ910009AJ
11
75
9.1V 1/2W
MTZJ9.1B
10
R2903
7, 12
47 ZD2902
R2904
0DZ910009AJ
9
75
9.1V 1/2W
MTZJ9.1B
C2805
R2811
17
A3L A3L
6.8K
1µF
R2810
16
50V
PROV
C2804
R2809
22
A3R A3R
6.8K
1µF
R2808
50V
PROV
15
R2905
14
ZD2903
47
13
R2906
0DZ910009AJ
75
9.1V
1/2W CN4B8
MTZJ9.1B
C2803
R2807 366-921G
18
A1R A1R
2.2K
1µF
R2806
50V
PROV
C2802
R2805
21
A1L A1L
2.2K
R2804 1µF
19
PROV 50V
20
ZD2800
8 PROV
6
5
4
3
2
1
CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER "X" IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.
A/V Switch Circuit
5 6
IC2901
0ISA722200A
LA7222
C2901
12
10µF
11
50V
+9V 10
SWF
9
C2902
8
10µF
7
C2904 50V
6
10µF
50V C2903
5
10µF
4
50V
R2907
1
3
100
2
ZD2904 2
R2908
0DZ910009AJ
3
75
9.1V 1/2W 1
MTZJ9.1B
4
C2909
5
AUD-LEFT-FRONT
PROV
6
R2916 R2917 50V
1K 1K
AUD-RIGHT-FRONT
7
8
6-6
7 8
C2474
10µF
50V RM2472
L2471 CM2473
JM2471
P/L
0 P/L
RM2473
50V
P/L
4.7K
CM2472
PROV
50V
CM2483 CM2481
P/L P/L
25V 50V
CM2482 RM2482
L2481
P/L PROV
P/L
50V
Y/C
C2905
MODELS
ONLY
10µF
50V
IC2902
0ISA722200A
LA7222
12
JM2904 RM2925
11
+9V
SWF
P/L
10
9
JM2903
8
P/L
7
6
CM2906
5
0.1
4
16V
3
2
1
C2910
RM2919
PROV
50V
R2926
1K
ALL SYMBOLS WITH "M" ON THE DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT.
9 10
WITH NO
COMB COMB
CM2473 180pF
L2471 4.7µH
RM2471 33
RM2473 4.7K
CM2472 270pF
CV-COMB
CM2471
LUMA-COMB
100pF
50V
RM2471
P/L
RM2481 CHROMA-COMB
100
Y/C NO Y/C
INPUT INPUT
IN OUT
C2474
JM2471 OUT IN
JM2901 OUT IN
JM2902 OUT IN
JM2903 OUT IN
+9V JM2904 OUT IN
SWF
C
Q2902
RM2924 B
0TR945009AA
KSC945C-Y
100
E
10K
JM2902
RM2923
P/L
0
C-MAIN
RM2922
1K
+9V
SWF
C2908
PROV
50V
C
Q2901
RM2918 B
0TR945009AA
KSC945C-Y
100
E
10K
CM2907
JM2901
RM2920
PROV
P/L
0
50V
Y-MAIN
RM2921
1K
CTRL-Y/C
CTRL-TV/AUX
CTRL-F/R
AUX-RIGHT-Y/C
AUX-LEFT-Y/C
AUX-RIGHT-VID
AUX-LEFT-VID