Service Manual

MM-E 2072-09333-00
3-14
No
Possibly a bad microphone, try a
different microphone and key/whistle
again, or connect 0 dBm audio to
pin 5 on the mic jack. Key the radio
by shorting J5 pin 8 to ground
Yes
4
PW Latch error
displayed on the screen
when whistling?
TX power
present
YesNo
Problem found.
Replace microphone
and proceed to
step 4 of checkout
Problem is on the HI POWER module.
Replace or repair as necessary.
Proceed to step 4 of the checkout
Connect a 0 dBm
audio signal to J5
pins 6 & 7 and key
the radio
TX power
present
YesNo
Verify the condition of
the RF cables from the
LORD module to the HI
POWER module using
an ohmmeter
Verify the condition of
the flat cable from the
LORD module to the HI
POWER module using
an ohmmeter
Cables good?
Cables good?
Yes
Problem is with the
CONTROL HEAD module.
Replace or repair as
necessary. Proceed to
step 4 of the checkout
Replace cable and
proceed to step 4
of the checkout
No
NoYes
Key the radio, whistle
and check J3 pin 11 for
AC voltage going to the
HI POWER module
Voltage present?
Problem is with the
LORD module. Replace
or repair as necessary.
Proceed to step 4 of
the checkout
Problem is on the
HI POWER module.
Replace or repair as
necessary. Proceed to
step 4 of the checkout
No
Yes
From Checkout Step
Figure 3-5. MICOM-Z Troubleshooting Chart 4