B) Main (Tuner) Circuit - Panasonic SA-AK230GCP Service Manual

SA-AK23 0GCP

17.2. (B) Main (Tuner) Circuit

SCHEMATIC DIAGRAM - 3
MAIN (TUNER) CIRCUIT
FM EXT
ANT
1
1
75 OHM
2
2
GND
3
3
AM LOOP ANT
4
AM EXT
4
ANT
JK2601
5
GNS-A0882DC
R2610
1K
D2601
B0BC5R000009
R2614
5.6K
C2633
12P
C2610
0.01
R2652
0
C2634
12P
TUNER PACK CIRCUIT
2.2P
5.6P 2SK544
2SC2786M
1.2U
1000P
100K
100K
180P
220
100K
560K
4.7P
2.2P
D2602
C2636
B0CDBB000015
1000P
L2601 L2602
R2619
G2BPC0000016
3.3K
R2612 C2608
100K
C2607 8P
0.047
R2611
390
C2625
16V22
C2630 C2632
C2611
6.3V100 1000P
50V4.7
C2612
R2616
0.01 1K
20 19 18 15
17 16
IC2602
LC72131MDTRM
PLL FREQUENCY SYNTHESIZER
1 2 3 4 5 6
R2638
3.3K
R2630
10K
: +B SIGNAL LINE : FM SIGNAL LINE
: FM/AM SIGNAL LINE : FM OSC SIGNAL LINE
Z2620
CF2601
LT10.7MA5DTF
0.47U
1 3
7
C2604
1000P
390
2
R2605
470
1000P
6
390
390 C2601 C2602
0.01 16V10
2SC1675l1l2
10P
680K
8
2.2P
2SC2787FL1TA
R2620
47K
C2609
C2614
1000P
50V3.3
IC2601
LA1833NMNTLM
FM/AM IF AMP
DET/AM OSC MIX/
FM MPX
24 23 22
R2618
3.3K
1 2 3
C2606
C2627
C2626
0.01
16V22
1
3
2 4
1
5 6
Z2602
G2BAD0000003
R2628
82
R2617
47K
R2629 27K
C2624
100P
14 13 12 11
R2632
10K
7 8 9 10
62
: AM SIGNAL LINE
: AM OSC SIGNAL LINE
R2604
1K
C2603
R2607
0.01
330
CF2602
LT10.7MA5DTF
1 3
R2606 R2601
470K 0
2
Q2601
Q2601
B1AABC000003
FM IF AMP
R2621
R2603
B1GCCFJJ0015
270
C2620
22K
16V10
SUPPLY SWITCH
C2638
0.01
R2643
22K
C2619
680P
C2617
0.01
C2642
50V1
C2641
50V1
21 20 19 18 17 16 15 14 13
IC2601
4 5 6 7 8 9 10 11 12
C2647
1000P
C2648
0.01
R2626
1K
C2649
C2629
0.1
6.3V100
R2633
1K
Q2606
Q2606
TUNER 15V
R2646
100K
C2644
6800P
R2642
6.8K
R2641
6.8K
R2645
100K
C2643
6800P
C2621
50V0.47
C2623
50V1
R2644
120
R2631
120
TGND
15V
TO
MAIN
CIRCUIT
DO/ST
(2A) ON
SD
SCHEMATIC
+7.5V
DIAGRAM-7
1A
RCH
CE
TO
MAIN
LCH
CIRCUIT
PLLDA
(2B) ON
DO/ST
SCHEMATIC
PLLCLK
DIAGRAM-7
1B