B) Main (Tuner) Circuit - Panasonic SA-AK640E Service Manual

17.3. (B) Main (Tuner) Circuit

SCHEMATIC DIAGRAM - 2
: +B SIGNAL LINE
: FM/AM SIGNAL LINE
MAIN (TUNER) CIRCUIT
Z2620
ENV17290G1Y
FM EXT
2SC2620
2SK238
22P 15P 4P
ANT
1
1
1P 8P
22
75 OHM 2
3
2
GND
4
3
0.022 100uF
AM LOOP 16V
ANT
100
AM EXT 4
5
ANT
JK2601
2SK360
8P
8P 2P
33P
D2602
C2636
B0CDBB000015
1000P
L2601 L2602
R2619
G2A411C00001 G2BPC0000016
3.3K
R2612 C2608
R2610
C2607 100K 8P
1K
0.047
R2611
390
C2625
16V22
D2601
C2630
C2632 C2611
B0BC5R000009
6.3V100 1000P
50V4.7
R2614
5.6K
C2612
C2633 R2616
0.01 1K
12P
19
20 18 17 16 15 14 13
C2610 IC2602
0.01
C1CB00001937
PLL FREQUENCY SYNTHESIZER
R2652
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
R2601
J0B1075AA006 J0B1075AA006
IFT 0
7 1 3 1 3
C2604 R2606
Q2606
470K
1000P B1GCCFJJ0016
2 2
R2605
TUNER 15V
470
SUPPLY SWITCH
Q2601
Q2601
B1AABC000003
FM IF AMP
6
R2621
R2603
C2601 C2602
100 Q2610
0.01 16V100 C2620
22K
2SC3311ARA
16V10
SWITCH
C2638
0.01 Q2610
15P
R2643
8
22K
R2639
22K
C2910
R2640
680P
22K
R2620
47K
R2646
100K
C2609
C2614
1000P C2644
50V3.3
R2642
4700P
6.8K
IC2601
C1BB00000962 C2642
50V1
R2641
FM/AM IF AMP
6.8K
DET/AM OSC MIX/
FM MPX
C2641
50V1
R2645
100K
24 23
22 21 20 19 18 17 16 15 14 13
C2643
R2618
4700P
3.3K
IC2601
1 2 3 4 5 6 7 8 9 10 1 1 12
C2647
1000P
C2606 C2621
C2627 C2626
50V0.47
1000P
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
68K
R2629 27K
C2624
100P
11
12
TGND
15V
R2632
10K
DET_OUT
R2633
DO/ST
1K
SD
+7.5V
9 10
RCH
CE
LCH
PLLDA
DO/ST
PLLCLK
SA-AK640E/EB/EG MAIN (TUNER) CIRCUIT
TO
MAIN
CIRCUIT
(2A) ON
SCHEMATIC
DIAGRAM-3
1A
TO
MAIN
CIRCUIT
(2B) ON
SCHEMATIC
DIAGRAM-3
1B
61
SA-AK640E / SA-AK640EB / SA-AK640EG