Service Manual

MM-E 2072-09333-00
3-11
No
Open radio and do a visual
inspection of the boards. If
visible damage is found, correct
by replacing or repairing
appropriate part
Ensure the power supply is on and provides 13.8 VDC
to the radio. Check inline fuse: replace if necessary
Radio
powered on?
Yes
1
Radio
powered on?
Yes
No
Using a DC voltmeter, check
for 13.8V at J3 pin 13 and J6
pin 11 on the LORD module
13.8 VDC
present?
No
Verify the condition of the flat
cable from the LORD module
to the HI POWER module
using an ohmmeter
Cable good?
No
Replace cable and
proceed to step 1 of
checkout
Problem in control head.
Replace or repair as necessary
Yes
Yes
Problem is in HI POWER module.
Replace or repair as necessary
From Checkout Step
Proceed to step 1
of checkout
Figure 3-2. MICOM-Z Troubleshooting Chart 1