Grundig KM 12, Service Manual, Page: 28 / 32

GRUNDIG Service GRUNDIG Service
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams KM 12 KM 12
3 - 21 3 - 22
PORT0
PORT1
PORT2
PORT3
PORT4
PORT5
PORT6
PORT7
P00-P03
P10-13
P20-23
P30-33
P40-43
P50-53
P60-63
P70-73
S0-S23
S24/BP0-
S31/BP7
COM0-COM3
V
LC0
-V
LC2
BIAS
LCDCL/P30
SYNC/P31
LCD
CONTROLLER
DRIVER
CPU CLOCK
IC V
DD
V
SS
RESET X2 X1 XT1 XT2
SUB MAIN
STAND BY
CONTROL
SYSTEM CLOCK
GENERATOR CLOCK
DIVIDER
CLOCK
OUTPUT
CONTROL
PCL/PT02/P22
ROM *2
PROGRAM
MEMORY
DECODER
AND
CONTROL
GENERAL REG.
RAM
DATA
MEMORY
1024 X 4 BITS
BANK
SBS
SP (8)
CY
ALU
PROGRAM
COUNTER *1
TIMER/EVENT
COUNTER *1
TIMER/EVENT
COUNTER *2
TOUT0
INTT2 INTT1
PT01/P21 PT02/P22/PCL
TI1/TI2/
P12/INT2
BASIC
INTERVAL
WATCHDOG
TIMER
TIMER/
EVENT
COUNTER
P0
WATCH
TIMER
CLOCKED
SERIAL
INTERFACE
INTERRUPT
CONTROL
BIT SEQ
BUFFER (16)
TI0/P13
PTO0/P20
BUZ/P23
SWSB1/P03
SO/SB0/P02
SCK/P01
INT0/P10
INT1/P11
INT2/P12
INT4/P00
KR0/P60
KR7/P73
8
INTCSI TOUT0
INTW f
LC0
INTT0 TOUT0
INTBT
fx/2
4
4
4
4
4
4
4
4
8
4
3
24
*1.
µ
PD753012, 753016, 753017
*2. ROM
f
LCD
IC601
µ
PD753017AGC-E03
–
ch 2
+
+
ch 1
–
–
ch 2
+
+
ch 1
–
A / B
V
ref
1
V
ref
2
I ref
1
ALC
M / N
3 4 5 6 7 8 9 10
14
13
12
11
15 16 17 18 19 20 21 22
2
1
24
23 ch2/B
ch2/A
ch1/A
ch1/B
Rec IN
ALC
GND
Rec IN
NF
Metal
Out
Rec
Out CG VCC
Tape A
Tape B Pre
Out
NF
NF Metal
Out
Rec
Out
M/N
GND 1
MIX
Out
Pre
Out NF
*
TA 8189 N
IC201 TA8189N IC303 TA8216H IC602 TC74HC237AP
A
B
C
SELECT
G1
G2
GL
ENABLE
INPUTS
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
DATA
OUTPUTS
LATCH
DECODER
SHIFT REGISTR
CONTROL
+
–
+
–
L1
(R1)
L2
(R2)
L3
(R3)
L4
(R4)
Vref
CL
DI
CE
V
DD
V
SS
LT
1
(R
T1)
LT
2
(R
T2)
LT
3
(R
T3)
LT
4
(R
T4)
L
TCOM
(R
TCOM)
L
VROUT
(R
VROUT)
L
VRIN
(R
VRIN)
L
T
OUT
(R
T
OUT)
IC301 LC75392