68009482001 September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts 7-25
Figure 7-23. Wireline RX Audio - A
Apply an on-channel signal at -47dBm,
modulated by a 1kHz tone at 60% rated
system deviation, to the Consolette receiver.
Verify the “Wireline Configuration” in the
Consolette Configuration is set to 600 Ohm.
Connect a 600 Ohm load across Wireline
Connector pins LINE1+ (J21-3) & LINE1- (J21-6).
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting
No No
Yes
Is there a 1kHz,
~310mVrms tone at R1852
on the Mainboard?
Refer to the “Receive
Audio Tuning
–
RX_AUDIO” section
of the manual.
Using the Wireline Out (RX) Gain
Setting in the Consolette Configuration, can
the audio level across J21-3 & J21-6 be
adjusted to ~775mVrms?
STOP
Is there a 1kHz,
~165mVrms tone at
R2851?
Verify C1849, U1818, C1881,
R1847, U1803, C1818 &
R2851 are placed properly.
Is ~1.35Vdc present at
U1818-3 & ~3.3Vdc present
at U1818-8 & U1803-1?
There may be an issue
with the internal board
routing of VCC_1.35V
and/or VCC_3.3V.
Replace U1818
and/or U1803.
No
No
No
No
Yes
Yes
Yes
~165mVrms tone present
Yes
Yes
Is the RX Codec Adjustment
in the Consolette Configuration
properly tuned?
Reprogram/Replace
Consolette Mainboard.
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