Motorola MCS 2000 Service Instructions

December 6, 2004 68P81083C20-D
9-28 Troubleshooting Troubleshooting Chart 1-11, SB9600 BUS RX
Troubleshooting Chart 1-11, SB9600 BUS RX
SB9600 Voltage Table for Charts 1-10 & 1-11
Data
U0103-64?
Data
J0403-6?
Yes
No
Busy
Voltage OK per
SB9600 Voltage
Table
Yes
No
Check Q0401,
R0413, R0415,
R0414, Q0402
No
Yes
Check
U0104
Check
J0403
Check
U0103
Perform the following while sending data.
i.e. Control Head button press,
Channel Change, Radio OFF/ON.
START
Note: Verify Voltages per SB9600 Busy Simplified Schematic.
MAEPF-25956-O
J0403-18
J0403-6
J0403-5
J0403-19
U0401-2, PIN 8
PIN 4
PIN 6
PIN 5
PIN 7
U0105-11
U0105-13
-14
U0103-63
R0129
PIN
NOMINAL
VOLTAGE
VOLTAGE DURING
MESSAGING
FUNCTION
SB9600
VOLTAGE
TABLE
5V
0V
OPPOSITE POLARITY OF J0403-18
OPPOSITE POLARITY OF PIN 6
TRACKS STATE OF PIN 5
TRACKS STATE OF
U0401-7 AND J0403-6
TRACKS STATE OF U0401-7,
J0403-6 AND U0105-13
0
5
5
5
5
0
0
5
5
5
5
5
5
5
5
0
BUS -
BUS +
BUSY
OP Amp Vdd
OP Amp GND
BUS -
BUS +
BUS_SCI
U0105 SCI_SELECT
(Flash Prog/Normal Mode Select)
SCI
SCI_RX
SCI_RX
Not Used in
Normal Operation
5

Motorola MCS 2000 Specifications

General

Brand	Motorola
Model	MCS 2000
Category	Radio
Language	English