Grundig GDM5051 Serviceanleitung Seite 29

CDM 900
IC403 TMP87CM24
VDD
VSS
C0
Voltage booster
C1
for LCD driver
V1
V2
V3
RESET
System Controller
TEST
Standby Controller
Timing Generator
XIN
High freq.
XOUT
Low freq.
A/D Converter
VAREF
P22
VASS
to
P20
IC302/402 BA05ST/BA07ST
VREF
VCC 2
1
CTL
3
GND
IC951 TA8148S
REC.
SW VS VO DET
8 7 6
9
GRUNDIG Service
Common outputs
COM3 to COM0
L C D
PSW
Flags RBS
ALU
Time Base
timer
Clock Generator
Watchdog
Timer
8-bit
P07 (AIN7)
P07
to to
to
P00
(AIN0) P00
-
+
4 VOUT
5 N.C
OSCILLATOR
VCC FB
GND OSC NC
3 2
5 4 1
Platinenabbildungen und Schaltpläne / Layout of PCBs and Circuit Diagrams
Segment outputs
SEG11 to SEG0
driver
Stack Pointer
Data Memory
(RAM)
Register banks
Interrupt Controller
8-bit
16-bit
Timer/
Timer/
Counter
Counter Interface
TC1 TC3 TC5
SIO1 SIO2
P17
P35
to
to
P10
P30
IC303 BA5415
+
-
Vcc
B.S.
1 2 3 5
4
IC4 BA4558N
+
1CH
-
2
1 3
+IN1
OUT1 -IN1
P67 P77 P87 P93
to to to to
P60 P70 P80 P90
Program
Counter
Program
Memory (ROM)
8-bit
Inst Register
Serial
Inst Decoder
P47
to
P40
T. S. D
B.S.
8
6 7 9 10 11
+
2CH
-
4 5 6
7
-IN2
V +IN2 OUT2 VCC
EE
12
8
3 - 15