68009482001 September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts 7-13
Figure 7-11. APCO RX Audio - A
Apply an on-channel signal at -47dBm,
modulated by a 1kHz tone at 60% rated
system deviation, to the Consolette receiver.
Is there a 1kHz,
~300mVrms tone at U1810-
6 on the Consolette
Mainboard?
Reprogram/Replace Consolette
Mainboard.
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting.
Is there a 1kHz,
~300mVrms tone at
R2830?
Is ~3.3Vdc
present at
U1810-2?
There may be an issue with the
internal board routing of
VCC_3.3V.
Verify R1878, U1810,
C1820, R1877, R1876 &
C1869 are placed properly.
Does U1810-1
measure ~2.8Vdc?
Replace U1810.
Reprogram/Replace Consolette
Mainboard.
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Is there a 1kHz,
Accessory 1 Connector
(J104-4)?
~300 mVrms tone at the
STOP
Is the RX Codec Adjustment
in the Consolette Configuration
properly tuned?
Refer to the “Receive
Audio Tuning -
RX_AUDIO” section of
the manual.
~300mVrms tone present
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