B) Main (Tuner) Circuit - Panasonic SA-AK640GCP Service Manual

17.3. (B) Main (Tuner) Circuit

SCHEMATIC DIAGRAM - 2
: +B SIGNAL LINE
: FM/AM SIGNAL LINE
MAIN(TUNER) CIRCUIT
TUNER PACK CIRCUIT
Q1
B1CECC000003
2.2P
5.6P
FM EXT
ANT
Q1
1
1 1.2U
75 OHM
2
2
GND
100K 1000P
100K
180P
3
3
AM LOOP ANT
AM EXT 4
390
4 Q2 220
100K
ANT B1AAAC000016
JK2601
560K
5
4.7P
Q3 680K
Q3,Q4
B1AAAC000015
2.2P
2.2P
D2602
C2636
B0CDBB000015
1000P
L2601 L2602
R2619
G2A411C00001 G2BPC0000016
3.3K
R2612 C2608
R2610
100K 8P
C2607
1K
0.047
R2611
390
C2625
16V22
D2601
C2630 C2632 C2611
B0BC5R000009
6.3V100
1000P 50V4.7
R2614
5.6K
C2633 C2612 R2616
0.01
12P 1K
20 19 18 17 16 15 14 13
C2610
IC2602
0.01
C1CB00001937
R2652 PLL FREQUENCY SYNTHESIZER
0
1 2 3 4 5 6 7 8
C2634
12P
R2638
3.3K
R2630
10K
: FM SIGNAL LINE : AM SIGNAL LINE
: FM OSC SIGNAL LINE : AM OSC SIGNAL LINE
R2604
Q2606
1K
C2603
R2607
0.01
CF2601 330
CF2602
J0B1075AA014 J0B1075AA014
Q2
0.47U
1 3 3 1
7
C2604 R2606 R2601
1000P 470K 0
390
2 2
R2605
470
Q2601 Q2601
1000P B1AABC000003
FM IF AMP
6
Q2606
R2621
390 R2603 B1GCCFJJ0016
C2601 C2602
0.01 16V10 270 C2620
22K
TUNER 15V
16V10
SUPPLY SWITCH
C2638
5.6P
0.01
8 C2910
R2643
680P
22K
Q4
R2620
R2646
47K
C2617 100K
C2644
0.01
6800P
R2642
6.8K
C2609
C2614 C2642
1000P R2641
50V3.3 50V1
6.8K
IC2601
C2641
C1BB00000962
50V1
FM/AM IF AMP
DET/AM OSC MIX/ R2645
FM MPX 100K
C2643
6800P
24 23 22 21 20 19 18 17 16 15 14 13
R2618
3.3K
IC2601
1 2 3 4 5 6 7 8 9 10 11 12
C2647
1000P
C2621
C2606
C2627
C2626
1000P 50V0.47
16V22 1 C2648
0.01
C2623
3
R2626 50V1
1K
2 4
1
R2644
120
5 6
Z2602
G2BAD0000003
R2631
120
R2628
C2649
C2629
82 0.1
6.3V100
R2617
47K
R2629 27K
C2624
100P
12 11
TGND
15V
R2632
10K
R2633
DO/ST
1K
SD
+7.5V
9 10
RCH
CE
LCH
PLLDA
DO/ST
PLLCLK
SA-AK640GCP MAIN(TUNER) CIRCUIT
TO
MAIN
CIRCUIT
(2A) ON
SCHEMATIC
DIAGRAM-3
1A
TO
MAIN
CIRCUIT
(2B) ON
SCHEMATIC
DIAGRAM-3
1B
61
SA-AK640GCP