— 35 —
— 36 —
— 37 —
— 38 —
KV-20FS12/20FV12/21FE12/A/C/21FM12/21FV12/C
1
2
3
4
[POWER SUPPLY, DEFLECTION, TUNER/IF, AUDIO, MTS]
A
B
C
D
E
F
G
H
I
J
5
6
7
8
9
10
11
12
13
14
K
D504
J-10
D519
E-12
D618
I-2
D2004
A-3
Q606
I-3
D204
C-12
D505
I-8
D520
G-14
D619
E-2
D2005
A-2
Q101
A-11
Q607
E-2
D208
A-13
D506
F-10
D601
D-2
D620
E-8
Q410
B-9
Q608
E-2
D209
C-13
D507
F-10
D602
F-2
D622
G-3
IC402
D-11
Q411
E-9
Q609
A-5
D210
B-13
D508
E-11
D605
E-4
D623
G-3
IC405
C-13
Q501
I-8
D212
B-1
D509
J-6
D610
C-5
D624
I-2
IC406
D-13
Q502
I-9
D213
B-2
D510
F-12
D611
D-7
D625
I-2
IC501
E-11
Q503
E-10
D230
D-14
D511
H-12
D612
E-2
D626
H-1
IC502
F-13
Q504
F-10
D231
D-13
D513
G-12
D613
D-7
D627
J-2
IC601
C-6
Q505
H-14
D401
D-10
D514
G-13
D614
D-7
D628
I-2
IC602
D-8
Q506
A-7
D403
C-9
D516
H-14
D615
G-6
D2001
F-2
IC603
E-8
Q507
A-7
D502
I-10
D517
G-14
D616
G-7
D2002
H-1
IC604
D-9
Q604
A-6
D503
I-11
D518
G-14
D617
I-2
D2003
C-1
IC2001
G-1
Q605
I-3
#: Not Mounted
IC
A BOARD LOCATOR LIST
DIODE
TRANSISTOR
K BOARD SCHEMATIC DIAGRAM (KV-20FV12/21FV12/21FV12C ONLY)
K BOARD IC VOLTAGES
20
GND
pin
volt
21
8.9
1
4.5
22
NC
2
4.5
23
NC
3
4.5
24
1.3
4
4.5
25
1.3
5
4.5
26
4.4
6
NC
27
3.9
7
4.7
28
4.5
8
4.5
29
4.5
9
4.5
30
NC
10
4.5
31
4.5
11
NC
32
4.5
12
4.5
33
4.5
13
4.5
34
4.5
14
1.0
35
NC
15
4.5
36
4.5
16
0.9
37
4.5
17
0.9
38
4.5
18
4.8
39
4.5
19
4.9
40
4.5
IC404
All voltages are in V
A BOARD: IC502 TDA8172
TDA8580Q/N1
VP1
3
IN 1
7
VP2
15
IN 2
8
+
-
+
-
60
k
60
k
V/l
V/l
+
-
OA
+
-
OA
OUT 1 +
OUT 2 -
1
4
45 k
45 k
Vpx
30 k
BUFFER
IN 4
IN 5
12
+
-
60
k
60
k
V/l
+
-
OA
+
-
OA
OUT 3 -
OUT 4 +
14
17
45 k
45 k
11
BUFFER
BUFFER
45
k
45
k
Vpx
+
-
V/l
MUTE
13
STANDBY
5
DIAG
6
DIAGNOSTIC
INTERFACE
IN 3
10
PGND1
2
PGND2
16
9
DC Volume Control 1
Input 1
Positive Output 1
Negative Output 1
Power
Ground 1
Signal
Ground
TEMPERATURE
PROTECTION
STABILIZER
REF
V
P
V
I + i
I – i
+
–
4
3
1
+
–
13
11
7
5
DC Volume Control 2
Input 2
I + i
I – i
1
2
Positive Output 2
Negative Output 2
10
8
2
6
12
9
Power
Ground 2
n.c.
A BOARD IC BLOCK DIAGRAMS
A BOARD: IC402 TDA8580Q/N1
(KV-21FV12/21FV12C ONLY)
A BOARD: IC401 TDA7057AQ/N2
(ALL EXCEPT KV-21FV12/21FV12C)
1
2
3
A
B
C
D
[AUDIO PROCESSOR]
(KV-20FV12/21FV12/21FV12C ONLY)
A BOARD TRANSISTOR VOLTAGE LIST
B
C
E
B
C
E
Q101
0.0
5.6
0.0
Q506
0.0
0.0
0.0
Q410
0.0
5.2
0.0
Q507
0.0
0.0
0.0
Q411
5.3
0.0
5.2
Q604
0.1
4.1
0.0
Q501
0.0
93.3
-0.6
Q606
-36.1
-35.3
-36.3
Q502
-0.1
133
0.0
Q607
0.7
0.1
0.0
Q503
0.2
3.8
0.0
Q608
0.0
0.7
0.0
Q504
0.1
-6.5
0.0
Q609
0.0
13.9
0.0
Q505
134.9
1.8
135.5
All voltages are in V
G
D
S
Q605
40.8
-35.6
36.8
A BOARD TRANSISTOR
VOLTAGE LIST
All voltages are in V
8
5.0 Vp-p (V)
9
174.3 Vp-p (H)
1
2.5 Vp-p (H)
2
182.8 Vp-p (H)
3
23.4 Vp-p (H)
5
30.4 Vp-p (V)
6
54.3 Vp-p (V)
7
31.1 Vp-p (V)
4
1.08 KVp-p (H)
A BOARD WAVEFORMS
A BOARD IC VOLTAGE LIST
2
GND
7
2.1
4
13.3
14
N/C
pin
volt
3
14.1
pin
volt
pin
volt
pin
volt
15
N/C
1
0.6
4
6.8
1
6.0
1
0.2
pin
volt
pin
volt
1
8.6
16
N/C
2
0.0
5
4.3
2
0.1
2
3.7
1
-31.8
1
13.3
2
30.7
17
4.7
3
2.4
6
NC
3
6.1
3
-2.5
2
-32.7
2
5.0
3
5.1
18
4.4
4
14.3
7
4.1
4
0.1
4
GND
3
53.2
3
GND
4
4.9
19
5.0
5
2.4
8
4.1
5
6.1
5
9.5
4
-23.8
5
4.9
20
5.0
6
0.0
9
6.8
6
9.0
6
10.1
5
-32.7
pin
volt
6
GND
21
0.3
7
0.6
7
5.3
7
0.1
1
5.0
7
5.5
22
0.0
8
6.9
pin
volt
8
GND
8
14.0
pin
volt
2
5.0
8
2.1
23
0.0
9
0.0
1
6.0
10
4.1
1
135.9
3
GND
9
8.9
24
0.0
10
6.9
2
0.1
11
6.2
pin
volt
2
123.4
10
4.1
25
0.0
11
6.9
3
6.1
12
0.2
1
2.1
3
GND
11
0.0
26
4.5
12
0.0
4
0.1
13
6.2
2
14.0
12
N/C
13
6.9
5
6.1
14
9.1
3
-12.6
pin
volt
13
N/C
6
9.0
15
5.4
4
-13.9
1
13.3
pin
volt
7
5.3
16
GND
5
0.2
2
8.9
1
6.8
8
GND
17
6.2
6
14.3
3
GND
IC601
IC602
IC405
IC401
IC603
IC502
IC 402
IC501
All voltages are in V
IC406
TU101
IC604
IC2001
879 A-K Board Schematics.p65
2/1/00, 1:04 PM
2
