Troubleshooting Flow Chart - HYT TM-628H User Manual

VCO

Troubleshooting Flow Chart

VCO
Check
Normal power
supply?
Yes
Rx oscillates? And
CV voltage is normal?
Yes
Q703 outputs
normally?
`
Yes
Normal
feedback?
Yes
16.8MHz
oscillates?
Yes
Check CPU data
circuit.
Check power supply
No
circuit of 8C circuit
No
Q706 works
normal?
No
Replace Q706
No
Check Q703
No
Check Q102
No
Check power
supply circuit.
HYT Mobile Radio
No
Yes
Q705 works
normal?
Yes
47
Replace
Q705