17
IC BLOCK DIAGRAM
LPF1
24
23
22
21
18
17
16
15
14
13
19
FM
RFout
RF
V
CC
AM
RFin
FM
OSC
AM
OSC
OSC
OUT
ST
LED
TEST
DET
OUT
MPX
IN LPF2
AM
LOW
CUT
20
AM
OSC
FM
OSC
BUFF
BUFF
1/1 or
1/16
ST
LEVEL
DET
AF
BUFF
AM
DET
FM
DET
FMIF
AMIF
AGC
AM
MIX
FM
MIX
FMRF
AF
VCO
DIVIDE
DECODE
SM/MO
FM/AM
MUTE
1
2
3
4
8
9
10
11
12
RF
GND
FM
RFin
MIX
OUT
V
CC
AM IF
IN
FM IF
IN
GND
AGC
QUAD R-OUT
L-OUT
5
7
6
V
CC
BFP
R-OUT L-OUT
FM
ANTENNA
OSC BUFF OUT
PSC SW
OPEN: 1/1
V
CC
: 1/16
GND : MONO
OPEN: ST
GND : AM
OPEN : FM
TA2180FN
Summary of Contents for GMS880
Page 1: ...Service Manual GMS880 GMS880 Service Manual GMS880...
Page 4: ...DISASSEMBLY INSTRUCTIONS 3 SCREW 3 x10 KA SCREW 3 x12 KM SCREW 3 x10 PA...
Page 5: ...ADJUSTMENT LOCATIONS 4...
Page 14: ...13 IC BLOCK DIAGRAM...
Page 15: ...14 IC BLOCK DIAGRAM PT2253A TA8227P...
Page 19: ...BLOCK DIAGRAM 18...
Page 20: ...WIRING DIAGRAM 19...
Page 21: ...SCHEMATIC DIAGRAMS 20...
Page 22: ...SCHEMATIC DIAGRAMS 21...
Page 23: ...SCHEMATIC DIAGRAMS 22...
Page 24: ...SCHEMATIC DIAGRAMS 23...
Page 25: ...PRINTED CIRCUIT BOARDS 24...
Page 26: ...PRINTED CIRCUIT BOARDS 25...
Page 27: ...PRINTED CIRCUIT BOARDS 26...
Page 28: ...27 EXPLODED VIEW PARTS LIST CABINET...
