68009482001 September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts 7-35
Figure 7-33. Crosspatch TX Audio - A
Verify the “Crosspatch-Hardware PTT Selection” in
the Consolette Configuration is set to Crosspatch.
Inject a 1kHz, 300 mVrms tone from a 600 Ohm
source into Crosspatch Connector’s CP_AUX_TX
(J24-8) & short CP_PTT* (J24-7) to ground.
Does the
Consolette key up and
begin transmitting?
Does U1809-18 on the
Consolette Mainboard
measure ~0Vdc (GND)?
Is the Consolette
TX dev. 60% of rated
system deviation?
STOP
Refer to the “Transmit
Audio Tuning –
AUX_TX” section of the
manual.
No
No
Yes
No
No
Yes
Yes
No
Yes
No
Yes
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting.
Yes
No
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting.
Does U1809-2
measure ~0Vdc
(GND)?
Verify CP_PTT* (J24-7)
is being routed properly
through the high speed
board & flex cable to
U1809-2.
Reprogram/Replace
Consolette Mainboard.
Replace U1809.
Is there a 1kHz,
~75mVrms tone at
U1800-3 on the Consolette
Mainboard?
Reprogram/Replace
Consolette Mainboard.
There may be an issue
with the internal board
routing of VCC_3.3V.
Yes
Yes
No
No
Is the Crosspatch In (TX) Gain
Setting in the Consolette
Configuration properly tuned?
Verify U1800, C1817, R1814
& R1816 are placed
properly.
Is ~3.3Vdc
present at
U1800-2?
Does U1800-1
measure ~0Vdc
(GND)?
Replace U1800.
Reprogram/Replace
Consolette Mainboard.
Is there a 1kHz,
~75mVrms tone at
U1800-4?
Yes
Yes
No
No
Verify R1808, R1807, C1811,
C1812 & U1801 are placed
properly & the resistor values
are correct.
Parts placed properly
Yes
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