Front Pcb - Teac AG-790 Service Manual

SCHEMATIC DIAGRAM
1
A
SW4
BAND
SW1 SW5 SW13
TUNING MODE FM MODE LOUDNESS
SW2 SW6 SW11
CD
DOWN MEMORY
SW3 SW7 SW10
UP AUX PHONO
SW8 SW9
TAPE M TUNER
B
1XP14
DATA
1 8R17 1k
CLOCK
2
PERIOD
3
8R16 1k
ST LED
4
8R15 1k
8R14 1k
1k
8R13
1XP5
8R12
1k
CK
3
DATA
2 1k
8R11
STB
1
1k
8R10
8R8 1k
1XP6
/TAPE
C 3
8R7 1k
TAPE
2
MUTE
1
+5V
3
8C4
10U/16V
8R4
2
10K
1
8TR1
8R3 8R5
REMOTE
330 10K
SENSOR
INSTRUCTIONS FOR SERVICE PERSONNEL
BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-
CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
AG-790

FRONT PCB

2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
8D3
1N4148
5
13 12
SW16
8D4
14 KEY4 KEY3
1N4148
BALANCE
6
VDD
45 15
SW15
S1
8D5
44 16
1N4148
TREBLE
7 S2
43 17
SW14
S3
8D6
42 18
1N4148
BASS
S4
8
41 19
S5
8D7
40 20
1N4148
S6
9
39 21
SW12
S7
38 22
SLEEP S8
37 23
S9
36 24
S10
35 25
S11
34 26
S12
S13 S14 S15 S16
27 28
33 32
1 28 5
PB5 PB6
2 27 6
PB4 PB7
3 26 8
PA3 PA4
4 25 9
PA2 PA5
5 24
PA1 PA6
6 23
PA0 PA7
7 22
PB3 OSC2
8 21
PB2 OSC1
9 20
PB1 VDD
10 19
PB0 RES
11 18
VSS PC5
12 17
8V1
INT PC4
2SA1015
13 16
PC0 PC3
14 15
PC1 PC2
8R18
10K
8VR1
VOLUME
3
V F D
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
8R21 10K
+5V
8R22 10K
11 10 9 8 7 6 5 4 3 2 1
8R27
KEY2 KEY1 STB CLK IC DIN DOUT 52
56k
OSC
51
VSS
50
LED1
49
LED2
48
LED3
47
8N2
PT6311 LED4
46
LED5
45
VDD
44 37
G1
43 36
G2
42 35
G3
41 34
G4
40 33
G5
G11 VDD VEE G10 G9 G8 G7 G6
29 30 31 32 33 34 35 36 37 38 39
31 30 27 28 29 30 31 32
8C8
8R32 3k9
30
8C7
+5V
30
8G1
8R19 100k
4.433MHz
8C5
104
NOTES:
£Parts marked with this sign are safety critical components.
They must always be replaced with identical components-refer
to the appropriate parts list and ensure exact replacement.
4
32 33 34 35 36 37 38 39 40 41
8R30
8R31 POW
2R2
2R2
2.1V
8D1
8R1 -24V
10K 5V1
0V
2.1V
DGND
8C3 +5V
100U/35V
8C2
100U/25V
8C1
8R2
LED1
560 470U/16V
STANDBY
8C6
8R28 104
LED3
560
LOUDNESS
8D2
8R29 1N4148
LED2
560
MUTING
+5V
8R20 8R33
8N3
10K
100 24C02
SDA
5 4
SCL
6 3
7 2
8 1
8C9
104
5
1XP4
1
2
3
4
5
6
7
A A G G - - 7 7 9 9 0 0
AM/FM Stereo Receiver
1 st Issue; March 2003