Motorola SSETM 5000 - Manual (Page 121)

6881094C12-A November 11, 2004
Troubleshooting Charts: VOCON TX Audio 9-17
VOCON TX Audio—Page 2
MAEPF-27397-B
Replace U501
(GCAP II)
Replace
U509
(EEPOT)
Go to
TX RF
flowchart
Replace U401
Clock
and Frame Sync
present?
Data
present at TX
test point?
Use an oscilloscope to check the
SSI audio signals from the GCAP
(U703). The following test points
are used for data collection:
DCLK: 256 kHz Square Wave Clock
TX: Audio Data Words
SYNC: 8 kHz Frame Sync Pulse
No
Yes
Yes
End
Problem
Resolved?
Yes
1
2
1
No
No
End
Replace
U501
(GCAP II)
Is
1 kHz signal
present at about
14 mV
rms?
Problem
Solved?
No
Yes
No
Yes
and reflash