3 - 2
GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
UMS 25
IC201 M62439SP (Sound Control)
IC401 AN7348K (PLAY / REC Pre Amplifier)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 REC OUT 2
INA2
INB2
IND2
TONEH2
TONEL2
OUT 2
VSS
CONT
INC2
REC OUT 1
INA1
INB1
INC1
IND1
TONEH1
TONEL1
OUT 1
GND
VDD
CONTROL
LOGIC
BASS
BOOST
TREBLE
BOOST
VOLUMR
VOLUMR
MUTE
MONO SW
INPUT SW
REC OUT SW
Nor/Cro
& Hi/Lo
Logic
R
R
P
R
P
P
ALC
Mute
Mute
Logic
A/B
Logic
Rec/PB
Ripple
Rejection
Rec
Amp(L)
Rec
Amp(R)
PB Amp(L)
PB Amp(R)
A/Rec
A/Rec
B
B
1
2
3
4
5
7
6
8
9
10
12
11
13
14
15
16
17
18
19
20
21
22
23
24
L-PB AMP
R-PB AMP
R-PB NF
R-PB EO
R-PB OUT
AB SW
R-REC OUT
R-REC IN
REC/PB SW
A/B SW
FIL
TER
GND
VCC
CR
O/NOR
HI/LO
ALC
L-REC OUT
L-REC IN
ALC
L-PB
AMP OUT
L-PB EO
L-PB NF
R-PB AMP
L-PB AMP
1
4
5
2
3
VCC
HEAD
SWITCH
CTRL1
CTRL2
GND
IC501 TDA7269 (Stereo Amplifier)
MUTE
IN-L
GND
IN-R
VSS
OUT-L
IN-L
OUT-R
5
7
9
11
4
8
3
1
6
10
2
+
+
-
-
IN-R
IN-R
IN-R
IC402 BA7755A (Head Switch)
46
AN0 to AN7
SEG0 to SEG39
30~37
PA0 to PA7
PB0 to PB7
30~37
PC0 to PC7
14~21
PD0 to PD7
PE0 to PE4
PE5 to PE6
PF0 to PF7
PG0 to PG7
PH0 to PH7
70~77
4,5
78~85
22~29
6~13
50~53
54~88
94~98
99,100,
1~3
86~88
94~98
49
48
47
8
40
4
4
3
7
9
10
8
12
13
11
99
6
5
5
8
8
8
8
8
8
8
5
2
41,91
89
38
40
39
42
43
92
93
TEX
TX
EXT
AL2
XT
AL2
EXT
AL1
XT
AL1
V
DD
V
SS
RST
NM1/INT3
PWM
CS0
SCK0
EC0
EC1
99
1 2
2
2 2
2
100
100
INT0
INT1
INT2
45
44
AV
SS
AV
REF
COM0 to COM3
VL
VLC1
VLC2
VLC3
RMC
SI0
SO0
SCK1
SI1
SO1
ADJ
TO
CINT
ROM
40K BYTES
PRESCALER/
TIME BASE TIMER
32KHz
TIMER/COUNTER
RAM
1120 BYTES
SPC700
CPU CORE
CLOCK GEN/
SYSTEM CONTROL
16 BIT CAPTURE
TIMER/COUNTER 2
8 BIT TIMER 1
8 BIT TIMER/COUNTER 0
SERIAL INTERFACE UNIT 1
14 BIT PWM GENERATOR
A/D CONVERTER
REMOCON
SERIAL
INTERFACE
UNIT 0
LCD
CONTROLLER/
DRIVER
FIFO
FIFO
INTERR
UPT CONTR
O
LLER
POR
T
A
POR
T A
POR
T
B
POR
T C
POR
T
D
POR
T
F
POR
T G
POR
T H
IC-Blockschaltpläne / IC Block Diagrams
IC101 CXP83240A (CMOS 8bit 1chip Microcomputer)
