Motorola MCS 2000 Service Instructions

68P81083C20-D December 6, 2004
Troubleshooting Troubleshooting Chart 1-10, SB9600 BUS RX 9-27
Troubleshooting Chart 1-10, SB9600 BUS RX
Data
J0403-6,
J0403-18?
Data
U0401-2 pin 6,
U0401-2 pin 5?
Data
U0105-13?
Yes
Yes
Yes
Voltages on
SB9600 Voltage
Table correct?
Correct as required.
Suggestion: Check for
shorted zener diodes.
No
Perform the following while sending data.
i.e. Control Head button press,
Channel Change, Radio OFF/ON.
Check VR0420,
VR0419
No
Check R0410,
R0411, C0437
No
Check
R0130, U0401
No
Check
U0103
Check
R0129
Data
U0105-14?
U0105
OK?
Yes
No
No Yes
Data
U0103-63?
Yes
Yes
No
Check
Q0103, VR0428
Repair or replace
U0105
GOTO SB9600
Tx Chart 1-11
Problem
Fixed
Failure
persists?
Yes
No
Note: For SB 9600 operation the SCI RX,
SCI TX, and Busy paths must all function.Ê
START
MAEPF-25955-O

Motorola MCS 2000 Specifications

General

Brand	Motorola
Model	MCS 2000
Category	Radio
Language	English