Motorola MCS 2000 Service Instructions

68P81083C20-D December 6, 2004
Troubleshooting SB9600 BUSY, Simplified Schematic for Charts 1-10 & 1-11 9-29
SB9600 BUSY, Simplified Schematic for Charts 1-10 & 1-11
SB9600, Simplified Schematic for Charts 1-10 & 1-11
C0439
470pf
C0438
470pf
(5V)
[4.25V]
(0V)
[4.9V]
(5V)
[0.06V]
(0V)
[1.5V]
(0V)
[4.9V]
(5V)
[0V]
R0424
4.7K
R0427
2K
R0425
4.7K
Q0406
Q0407
VR0421
R0426
4.7K
+5
+5
BUSY_IN
U0103-76
SLIC
BUSY_OUT
U0104-G4
BUSY
J0403-5
( V ) - Voltages when radio is in STEADY STATE
[ V ] - Voltages when radio is asserting busy
in order to take control of SB9600 BUS
Q0426
Q0100
Q0420
Q0400
Q0401
Q0402
R0433
47K
R0127
0
C0462
470pf
VR0427
14V
C0453
470pf
VR0429
14V
C0436
470pf
C0455
0.1µf
C0437
33pf
VR0420
10V
C0435
470pf
VR0419
10V
VR0428
10V
R0421
4.7K
R0449
4.7K
R0106
10K
R0402
10K
R0126
47K
R0415
2.2K
R0412
4.7K
R0409
2.2K
R0113
0
R0111
0
R0407
4.7K
R0451
4.7K
U0104
4.7K
47K
J0405
47K
4.7K
R0413
10K
R0452
10K
R0414
22K
R0411
100
R0410
100
R0130
0
R0129
0
R0021
10K
R0020
10K
R0408
10K
Q0103
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
VDD
SCI SELECT
C MOD B / O MOD A/B
BOOT_SCI
BUSY
SCI_RX_DATA
I/O 4
BUS +
BUS -
18
6
20
19
5
DATA
Z
A
SCI TX
C/H CONN
U0401-2
7
4
6
5
--
+
J0403
K4
SCI TX
U0003
K4
SCI RX
U0003
X1
X
X0
U0105
OPEN ONLY
BUS SCI
TP0005
13
14
12
11
TP0004
TP0002
63
64
33
32
76
BUSY BUFFER
SLICIVA
U0104
K4
MOD B
U0003
G4
SCI RX
SCI TX
MOD A
MOD B
BUSY_ IN
U0103
MICRO
PROCESSOR
CLOSED ONLY
4
15
5V NORMALLY
0V NORMALLY
BUSY_OUT
B2
C/H CONN
J0405
U0104
IN-4
C6
SEE "SCI DRIVER" SCHEMATIC
SCI_ECHO
= NOT PLACED
MAEPF-25964-O

Motorola MCS 2000 Specifications

General

Brand	Motorola
Model	MCS 2000
Category	Radio
Language	English