17.3. (B) Main (Tuner) Circuit
Q1
B1CECC000003
Q1
Q3
Q2
Q4
Q2
B1AAAC000016
Q3,Q4
B1AAAC000015
MAIN(TUNER) CIRCUIT
SA-AK640GCP MAIN(TUNER) CIRCUIT
SCHEMATIC DIAGRAM - 2
C2647
1000P
JK2601
IC2602
C1CB00001937
C1BB00000962
PLL FREQUENCY SYNTHESIZER
IC2601
FM/AM IF AMP
DET/AM OSC MIX/
FM MPX
CF2601
J0B1075AA014
J0B1075AA014
X2603
H0H720400007
D2601
B0BC5R000009
Q2606
Q2606
B1GCCFJJ0016
TUNER 15V
SUPPLY SWITCH
R2634
470
R2635
1K
Q2601
Q2601
B1AABC000003
FM IF AMP
+7.5V
SD
DO/ST
15V
TGND
PLLCLK
DO/ST
PLLDA
LCH
CE
RCH
DO/ST
CE
PLLDA
PLLCLK
DO/ST
SD
C2603
0.01
C2604
1000P
R2604
1K
R2606
470K
R2607
330
R2601
0
R2605
470
C2601
0.01
C2602
16V10
R2603
270
TUNER PACK CIRCUIT
C2607
0.047
R2610
1K
R2612
100K
C2608
8P
C2636
1000P
R2614
5.6K
R2652
0
C2610
0.01
TO
MAIN
CIRCUIT
(2B) ON
SCHEMATIC
DIAGRAM-3
R2638
3.3K
R2630
10K
C2634
12P
C2633
12P
C2612
0.01
R2615 560
R2616
1K
C2611
50V4.7
R2613 10K
C2625
16V22
C2632
1000P
C2630
6.3V100
R2651
82
C2613 1000P
R2619
3.3K
R2611
390
R2628
82
R2617
47K
R2618
3.3K
C2627
16V22
Z2602
G2BAD0000003
C2626
1
C2606
1000P
C2614
50V3.3
C2609
1000P
C2615 50V4.7
C2616 0.033
R2620
47K
R2643
22K
C2638
0.01
R2623 68K
C2620
16V10
R2621
22K
R2602 4.7K
C2639 50V4.7
C2618 0.01
C2617
0.01
C2642
50V1
R2642
6.8K
C2641
50V1
R2641
6.8K
R2626
1K
R2625 470
R2629
27K
R2627 470
C2624
100P
R2632
10K
C2648
0.01
R2624
33
X2602
H3F1065A0002
C2622 50V1
R2622 2.7K
C2621
50V0.47
R2631
120
R2644
120
R2633
W2919
0
1K
C2629
6.3V100
C2649
0.1
C2623
50V1
R2645
100K
C2643
6800P
C2644
6800P
R2646
100K
TO
MAIN
CIRCUIT
(2A) ON
SCHEMATIC
DIAGRAM-3
1A
1B
1
2
3
4
CF2602
R2636
1K
R2637
1K
L2601
G2A411C00001
L2602
G2BPC0000016
D2602
B0CDBB000015
: +B SIGNAL LINE
STRQ
SDC
LW
AIN
PD
AOUT
VDD
FMIN
AMIN
IFIN
MONO
FM
AM
CE
DI
CL
DO
VSS
XOUT
XIN
IC2601
PILOT
OUT
MPX
IN
PILOT
IN
DET
OUT
ST
AM
OUT
RCH
LCH
MONO
FM/AM
OSC
AFC
AM
RF
IN
AGC
AM
MIX
OUT
REG
AM
IF
IN
GND
SD
FM
DET
VCC
STRQ
OSC
OUT
FM
IF
IN
1
2
3
4
21
22
23
24
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
AM LOOP ANT
AM EXT
ANT
75 OHM
FM EXT
ANT
GND
C2637
C2631
150P
3300P
1
2
19
20
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
1
2
3
5
6
4
1
3
2
1
3
2
1
2
3
4
5
7
6
8
5.6P
100K
1000P
220
100K
180P
2.2P
1.2U
680K
3.3P
18P
390
0.47U
1000P
390
680K
5.6P
2.2P
390
560K
4.7P
2.2P
2.7K
100K
: FM/AM SIGNAL LINE
: FM SIGNAL LINE
: FM OSC SIGNAL LINE
: AM SIGNAL LINE
: AM OSC SIGNAL LINE
C2910
680P
SA-AK640GCP
61
Summary of Contents for SA-AK640 GBP
Page 13: ...8 Operating Instructions Procedures 13 SA AK640GCP ...
Page 14: ...14 SA AK640GCP ...
Page 23: ...10 3 Main Parts Location 23 SA AK640GCP ...
Page 40: ...12 2 Checking and Repairing of Transformer P C B 40 SA AK640GCP ...
Page 41: ...12 3 Checking and Repairing of Panel Deck Deck Mechanism P C B 41 SA AK640GCP ...
Page 42: ...12 4 Checking and Repairing of Power P C B 42 SA AK640GCP ...
Page 47: ...47 SA AK640GCP ...
Page 48: ...14 2 Power P C B Transformer P C B 48 SA AK640GCP ...
Page 49: ...14 3 Waveform Chart 49 SA AK640GCP ...
Page 50: ...50 SA AK640GCP ...
Page 52: ...52 SA AK640GCP ...
Page 58: ...58 SA AK640GCP ...
Page 60: ...SA AK640GCP 60 ...
Page 62: ...SA AK640GCP 62 ...
Page 68: ...SA AK640GCP 68 ...
Page 70: ...SA AK640GCP 70 ...
Page 76: ...SA AK640GCP 76 ...
Page 84: ...SA AK640GCP 84 ...
Page 89: ...21 Exploded Views 21 1 Cabinet Parts Location SA AK640GCP 89 ...
Page 90: ...SA AK640GCP 90 ...
Page 91: ...21 2 Deck Mechanism Parts Location RAA4502 S SA AK640GCP 91 ...
Page 92: ...21 3 Packaging SA AK640GCP 92 ...