Motorola Mototrbo - Troubleshooting Chart; 1.0 Generic Option Board (GOB) Troubleshooting Chart

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Section 1
TROUBLESHOOTING CHART
1.0 Generic Option Board (GOB) Troubleshooting Chart
Start
Yes
Yes
Yes
Yes
Yes
Yes
Board able to
power up?
SSI_CLK
Vmax=1.8V,
Freq=8kHz
SSI_FSYNC
Vmax=1.8V,
Freq=8kHz
Check activity
at SSI_RX?
Vmax=1.8V
Check activity
at SSI_TX?
Vmax=1.8V
Finish
* To check SSI lines, GOB needs to connect with radio
* All the SSI lines must probe with oscilloscope
Inspect U5106
Inspect U5109
Inspect U5110
Inspect U5109
Check power
supply
No
No
No
No
No