Motorola APX 7500 Detailed Service Manual page 138

7-22
Connect a 150 Ohm load across Headset 2
Connector pins HDST2_SPKR+ (J12-7) &
HDST2_SPKR- (J12-3). 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 J12-7
& J12-3?
Yes
STOP
September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts
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 C1802
on the Consolette
Mainboard?
Yes
Is there continuity
between C1802 on the
Mainboard & J12-7 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 HDST2_SPKR+ is being
No
routed properly from C1802
through the flex cable & high
speed board to J12-7.
Figure 7-20. Headset 2 RX Audio
68009482001