Grundig KM 12 Service Manual page 28

Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
IC201 TA8189N
Metal Pre Tape A Rec
NF Out Out Tape B VCC CG Out
22 21 20 19 18 17 16
TA 8189 N
A / B
ch2/B 23
–
ch 2
+
ch2/A 24
*
ch1/A 1
+
ch 1
–
ch1/B 2 M / N
3 4 5 6 7 8
NF Metal Pre MIX GND 1 M/N Rec
Out Out Out Out
IC301 LC75392
L1
(R1)
L2
(R2)
L3
(R3)
L4
(R4)
Vref
LATCH
DECODER
CL
DI CONTROL
SHIFT REGISTR
CE
3 - 21
IC303 TA8216H
NF
15
–
ch 2 Rec IN
14
+
ALC
13
ALC
GND
12
+
ch 1 Rec IN
11
–
9 10
NF
IC601
+
–
+
TI0/P13
–
PTO0/P20
BUZ/P23
SWSB1/P03
SO/SB0/P02
SCK/P01
INT0/P10
INT1/P11
INT2/P12
INT4/P00
V V
DD SS
KR0/P60
KR7/P73
*1. µPD753012, 753016, 753017
*2. ROM
GRUNDIG Service
KM 12 Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
IC602 TC74HC237AP
A
SELECT B
C
G1
ENABLE
G2
INPUTS
GL
µ
PD753017AGC-E03
TI1/TI2/
PT01/P21 P12/INT2 PT02/P22/PCL
TIMER/EVENT TIMER/EVENT
COUNTER *1 COUNTER *2
INTT1
BASIC
INTERVAL
WATCHDOG
TIMER
PROGRAM
INTBT
COUNTER *1
TIMER/
EVENT
COUNTER
P0
INTT0 TOUT0
WATCH
TIMER
INTW f
LC0
ROM *2
PROGRAM
CLOCKED
MEMORY
SERIAL
INTERFACE
INTCSI TOUT0
INTERRUPT
CONTROL
fx/2
8
SYSTEM CLOCK
CLOCK
CLOCK
OUTPUT
BIT SEQ
DIVIDER
CONTROL
BUFFER (16)
PCL/PT02/P22 XT1 XT2
3 - 22
TOUT0
INTT2
PORT0
PORT1
SP (8)
PORT2
CY
SBS
ALU
PORT3
BANK
PORT4
PORT5
GENERAL REG.
PORT6
DECODER
AND
CONTROL
PORT7
RAM
DATA
MEMORY
1024 X 4 BITS
LCD
CONTROLLER
DRIVER
f
LCD
GENERATOR STAND BY
CPU CLOCK
CONTROL
SUB MAIN
X1 X2 IC V V RESET
DD SS
KM 12
Y0
Y1
Y2
Y3
DATA
OUTPUTS
Y4
Y5
Y6
Y7
4 P00-P03
4 P10-13
P20-23
4
4 P30-33
P40-43
4
P50-53
4
4 P60-63
4 P70-73
S0-S23
24
S24/BP0-
8
S31/BP7
4 COM0-COM3
3 V -V
LC0 LC2
BIAS
LCDCL/P30
SYNC/P31
GRUNDIG Service