Radio Shack TRC-447 Service Manual

— 44 —
IC INTERNAL DIAGRAMS
Filter
Amp.
AF
Amp.
IC102
S1T3361D01
IC301
BU2630F
16
15
14
13
12
11
10
98
7
6
5
4
3
2
1
XIN
Vss
RPD
P-R
RON
F-R
CE
CK
XOUT
V
DD
TPD
P-T
TON
F-T
LD
DA
14BIT REFERENCE
COUNTER
I / O
CTL
PHASE
DET
16BIT PROGRAM
COUNTER
SHIFT REGISTER
SHIFT REGISTER
SHIFT REGISTER
SHIFT REGISTER
14BIT REFERENCE
COUNTER
16BIT PROGRAM
COUNTER
PHASE
DET
IC104
SM8224CM
AGND
TIP
RING
TRQ
GND
OSCIN
OSCOUT
MODE
TEST
DOUT
DT1
DT2
DTQ
SO
S1
VDD
TO
CR
DTDET
STR
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
IC401
µPD789166
1
2
3
4
5
6
7
8
9
10
11
P60/ANI0
P60/ANI1
P60/ANI2
P60/ANI3
P60/ANI4
P60/ANI5
P60/ANI6
P60/ANI7
AV
SS
P10
P11
12 13 14 15 16 17 18 19 20 21 22
P30/INTP0/TO81/CPT90
P31/INTP1/TO81 P32/INTP2/TO90
P33/INTP3/TO82/BZO90
P20/SCK20/ASCK20
P21/SO20/T
X
D20
P22/SI20/R
X
D20
P23 P24
IC0
33
32
31
30
29
28
27
26
25
24
23
P01
P00
P26/TO80
P25/T180/SS20
V
DD0
V SS0
X1
X2
RESET
XT1
XT2
44 43 42 41 40 39 38 37 36 35 34
AV
REF
AV
DD
P53 P52 P51 P50 P51 V
SS1
P04 P03 P02
V
DD1

Radio Shack TRC-447 Specifications

General

Brand	Radio Shack
Model	TRC-447
Category	Radio
Language	English