Zone/Channel Select Error Troubleshooting Chart - Motorola XTS 2500 Service Manual

UHF2 Troubleshooting Charts: Zone/Channel Select Error Troubleshooting Chart

6.3.12Zone/Channel Select Error Troubleshooting Chart

Channel
Select Error
Verify operation
of zone knob per
"Button Test"
flow chart
By studying the
adjacent chart against
the channel numbers
which have errors,
one signal may be
determined to be in
error or verify logic
levels at R513-R516
for each channel.
Signals
check good
at 800?
Verify voltage levels
directly at pin C1 of
the frequency switch
(S500). Position A =
2.2V, Position B = 0V,
Position C = 1.5V
S500
checks
good?
Verify
contact with
circuit board
6816985H01-F
Channel
Probe Point
Verify codeplug
programming with
Yes
RSS. If codeplug
checks OK, then
replace U800.
No
Replace
No
Switch
S500
Yes
RTA3 RTA2
(R513) (R514)
1 1 1
2 1 1
3 1 1
4 1 1
5 1 0
6 1 0
7 1 0
8 1 0
9 0 1
10 0 1
11 0 1
12 0 1
13 0 0
14 0 0
15 0 0
16 0 0
MAEPF-27337-O
RTA1
RTA0
(R515)
(R516)
1
1
1
0
0
1
0 0
1 1
1
0
0
1
0
0
1
1
1
0
0 1
0
0
1
1
1
0
0
1
0
0
February 14, 2012
6.3-11