Motorola APX 7500 Detailed Service Manual page 137

Troubleshooting Charts and Error Codes Troubleshooting Charts
Connect a 150 Ohm load across Headset 1
Connector pins HDST1_SPKR+ (J11-7) &
HDST1_SPKR- (J11-3). Mute the local
speaker using the Speaker Mute Button.
Apply an on-channel signal at -47dBm,
modulated by a 1kHz tone at 60% rated
system deviation, to the Consolette receiver.
Can the O5 volume
knob be adjusted to get a
1kHz, ~100mVrms tone
across J11-7 & J11-3?
Yes
STOP
Figure 7-19. Headset 1 RX Audio
68009482001
Are the APX7500
No
mobile & O5 control head
operating properly?
Yes
Is the RX Codec Adjustment in
the Consolette Configuration
properly tuned?
Yes
Is there a 1kHz,
~100mVrms tone at C1853
on the Consolette
Mainboard?
Yes
Is there continuity
between C1853 on the
Mainboard & J11-7 on the
high speed board?
Yes
STOP
Refer to the APX7500
Detailed Service
No
Manual for correct
operation and
troubleshooting.
Refer to the "Receive
No
Audio Tuning –
RX_AUDIO" section of
the manual.
No
Reprogram/Replace
Consolette Mainboard.
Verify HDST1_SPKR+ is being
No
routed properly from C1853
through the flex cable & high
speed board to J11-7.
September 9, 2011
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