Hln6837A Astro Spectra Plus Rf Interface Schematic (Sheet 1 Of 2) - Motorola ASTRO Digital Spectra Plus Detailed Service Manual

Schematics, Component Location Diagrams and Parts Lists: ASTRO Spectra Plus VOCON Section
ASTRO Spectra Plus VOCON Section
KRSIC_DB(7:0)
KRSIC_AB(4:0)
ADDAG QSPIA
SFS
ADDAG SSI
SCK
STD
6881076C25-E
KRSIC_DB(7:0)
KRSIC_AB(4:0)
I
ADDAG_SEL
I
QSCKA
I
MOSIA
I
MISOA
O
TXE
I
36
DSPCLK
35
SFS
O
34
SCK
O
33
STD
I
32
SRD
31
VCC3.0
DVDD2
30
DGND
29
DVDD1
28
AGND1
27
AVDD1
26
AGCB
25
AGC
C214 C205
0.1uF 0.1uF
VCC3.0
C206
0.1uF
C218
0.1uF
TP208
MOD_OUT
O
REFMOD
O
TP209
VCC3.0
C200
0.1uF
VCC3.0
VCC5.0
C202
0.1uF
1
TCLKB
2
*C204*
TCLK
3
4.7uF
AVDD2
4
AGND2
5
U201
OUTQB
6
57W85
OUTQ
7
ADDAG
OUTIB
*C203*
8
OUTI
4.7uF
9
FMOUT
10
ASW
11
C222
VCNTO
12 0.1uF
VCNTF
DNP
VCC3.0
C207
C208
1000pF
0.1uF
*R224*
100K
A
B
C
VCC3.0
R200
100K
C201
D
4.3pF
R201
100K
VCC5.0
R203 R204
120K 120K
DNP DNP
MC33202
U202-1
4
3
R231
1
2 8
30K
VCC5.0
C215
1000pF
C221
0.1uF
R206
DNP
R202
R205
120K
120K
DNP 13K
DNP
C216
220pF
R207
R208
30K
VCC5.0
30K
C217
VCC5.0
U202-2
0.1uF
6 8
MC33202
7
5
4
R209
30K
C223
R226
0.1uF
30K

HLN6837A ASTRO Spectra Plus RF Interface Schematic (Sheet 1 of 2)

7-51
September 5, 2008