68009482001 September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts 7-37
Figure 7-35. Headset 1 TX Audio
Inject a 1kHz, 80 mVrms
tone from a 50 Ohm source
into Headset 1 Connector’s
HDST1_MIC+ (J11-5) &
short HDST1_PTT* (J11-6)
to ground.
Does the
Consolette key up and
begin transmitting?
Is the Consolette
TX dev. 60% of rated
system deviation?
STOP
Refer to the “Transmit
Audio Tuning -
Headsets” section of the
manual.
No
No
No
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 U1809-6
measure ~0Vdc
(GND)?
Verify HDST1_PTT*
(J11-6) is being routed
properly through the
high speed board & flex
cable to U1809-6.
Reprogram/Replace
Consolette Mainboard.
Replace U1809.
Is the Headset Mic
(TX) Gain Setting in the
Consolette Configuration
properly tuned?
Is there a 1kHz,
~20mVrms tone at U1801-
1 on the Consolette
Mainboard?
Reprogram/Replace
Consolette Mainboard.
Verify R1810, R1809, C1813,
C1814, C1815 & U1801 are
placed properly & the resistor
values are correct.
Is ~1.35Vdc
present at U1801-3 &
~3.3Vdc present at
U1801-4?
There may be an issue
with the internal board
routing of VCC_1.35V
and/or VCC_3.3V.
Replace U1801.
Verify
HDST1_MIC+
(J11-5) is being
routed properly
through the high
speed board &
flex cable to
C1801.
Verify E1800, R1800, R1801, C1800
& C1801 are placed properly & the
resistor values are correct.
Yes
Yes
Yes
Yes
Yes
No
No
No No
Is there a 1kHz,
~40mVrms tone at
R1810?
Does U1809-14 on the
Consolette Mainboard
measure ~0Vdc (GND)?
Continuity
between J11-5 on the
high speed board &
C1801 on the
Mainboard?
Yes
No
Yes
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