Service manual

2
ABCDEFGH I J
1
3
4
5
7
DRX-1
6
162
NC
GND
TUNER
AGC AGC
VIF
VIF
AMPLIFIER
SIF
AMPLIFIER
AGC
INTERCARRIER
MODE SWITCH
SIF
QSS MIXER
INTERCARRIER MIXER
AM DEMODULATOR
FPLL
VCO
TWD
VIDEO DEMODULATOR
AND AMPLIFIER
FM-PLL DEMODULATOR
AFC
DETECTOR
VOLTAGE
REFERENCE
I764 D3
7708 D2
12
H
L
3715 D10
PSS
H
H
L
5701 A10
5702 A5
5703 B9
L
I713 A8
3721 E10
3719 C2 3724 D7
3725 E9
3726 D9
low leakage
H
D
E
3722 E9
3,3V
TS
SAWS
PAL D/K
1701 C5
1702 D5
5707 E10
Bead
0V
not used
3,3V
4702 E5
5009 E9
5700 A2
3716 C1
I751 E4
7709 E9
F303 B10
C
3717 E8
3718 E4
I712 B8
3456
I731 E10
I732 E9
I733 E103727 E8
3728 E8
3729 E5
3730 E5
L
3
2715 D7
45
2718 E8
3703 A2
3704 A4
3705 A9
3706 A8
3707 A7
3708 A4
3709 A9
3720 B1
3,3V
5V
L
I709 A7
I710 B7
I711 A7I706 C5 I718 A10
I719 E7
I720 A43723 E7
I752 D4
I753 E4
I756 B1
I757 B1
I758 B1
I759 A1
not used
2,7V
1705 B2
2700 A3
2701 A4
1703 E10 6702 E4
H
4701 C4
2702 A4
2703 A7
2704 A7
2705 A9
3710 D10
3711 A1
A
B
I736 D9
I737 D10
I739 D7
H
I730 E10
5,2V
I734 D10
3,5V
H
3,3V
PAL I
2,5V
7
F705 A4
I701 A6
I703 A4
2717 A1
SEC B/G
2V
3,1V
5704 E3
2716 A3
6
3700 A3
D
E
I707 C6
I708 C6
B
C
89
I760 A1
I761 A1
I762 A3
I704 B4
1700 B5
I763 A3I714 B8
I717 A9
0,9V
PAL B/G
F701 C3
F702 C2
F703 B6
78910
12
5705 A1
7700 A10
7701 B5
L
I735 E8
2707 A10 7702 C5
7703 B7
7704 D10
AFC-ADJUST
6703 E6
3,2V
SEC D/K
7705 E7
7706 E9
I741 D7
SB1
N750
F704 B5
2,8V
0,7V
AGC-ADJUST
2,7V
3,2V
3712 D4
3713 D5
3714 C4
2709 A8
2710 A8
2711 C3
2712 D3
3701 A6
3702 A9
10
A
5SW
L
L
SEC L'
3V
2713 A1
2714 D7
6700 B4
7707 E4
SEC L
40,4-ADJUST
5706 A3
F700 C3
2V
L
6701 C4
2708 A10
2706 A7
10u
2708
3K3
3722
6703
MCL4148
5700
GNDFV
3723
100K
GNDFV
GNDFV
I709
330R
3706
18K
3709
680R
3701
47u
2717
2u2
GNDFV
2718
I762
4701
I753
GNDFV
1
2
3
4
6
78
5SW
I712
7KMY 5702
GNDFV
I757
7700
PDTC124EU
I732
5SW
680R
3724
GNDFV
3707
22K
BC847C
7705
I718
GNDFV
5SW
GNDFV
I711
3716
100R
1u
5704
57037KMY
1
2
34
6
78
8p2
2710
GNDFV
I708
3710
100R
470p 2704
3708
100R
5705
10u
F705
2706 100n
3703
150K
2712
1n
3714
4K7
15u
5707
5SW
3730
5K6
GNDFV
I763
5SW
7708
GNDFV
I735
I752
PDTC124EU
5SW
2u2
2714
7702
PDTC124EU
I704
2K7
3727
I713
10n
2707
19
2
202122
23
24
3
4
5
67
8
9
TDA9818
7703
1
10 1112 13
14
15
16
1718
GNDFV
I759
GNDFV
3715
100R
F700
47n
2713
F703
BC857BW
7706
GNDFV
6701
1SS356
I736
I730
GNDFV
GNDFV
3717
1K
I761
6u8
5701
TU
2
VCC
7
4K7
3725
9
AGC
1
AS
3
IF
11
12 13 14 15
6
10
NC|ADC
8
SCL
4
SDA
5
GNDFV
1705
UV1316K
+33V
GNDFV
270R
3721
3718
4K7
120p
2701
3712
2K2
I720
F704
100R
I756
33STBY
3720
220p
2702
6K8
3713
1n
2715
5K6
3729
I703
GNDFV
I714
I758
6u8
5009
GNDFV
I751
4702
220n 2709
7709
BC847BW
I741
GNDFV
F702
GNDFV
GNDFV
4K7
3719
I733
GNDFV
6702
1SS356
7704
BC857BW
I734
3711
F303
5SW
GNDFV
2700
22u
I706
1703
TPS
3
2
1
3704
4K7
I737
OFWK3953M
1700
1
2
3
4
5
I739
GNDFV
GNDFV
2703
2u2
GNDFV
2705 100n
GNDFV
F701
I760
GNDFV
2
3
4
5
5K6
3702
1n
2711
OFWG3956M
1701
1
330R
3728
I764
I731
BC847BW
7707
100u 2716
5SW
I710
OFWK9656M
1702
3
GND
1
2
4
5
Tuner/Demod. TU
GNDFV
GNDFV
GNDFV
GNDFV
GNDFV
I719
GNDFV
3705
18K
GNDFV
6u8
5706
5K6
3726
I707
3700
33K
GNDFV
7701
PDTC124EU
I701
1SS356
6700
VFV
SB1
AGC_MUTE
I717
SB1
SIF1
SAWS
SCL1
SDA1
SB1
AFC
TS
PSS
■ SCHEMATIC DIAGRAM A, B, G model
ANALOG: TUNER / DEMODULATOR