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September 9, 2011
68009482001
7-30
Troubleshooting Charts and Error Codes
Troubleshooting Charts
Figure 7-28. 4-Wire Wireline TX Audio - A
Verify the “Wireline Configuration” in the
Consolette Configuration is set to 4-wire and
600 Ohm and “TRC AGC Configuration” is set
to Disabled. Also verify “Wireline Function” is
set to Hardware PTT in the Audio Parameters
of the Consolette Configuration.
Inject a 1kHz, 1.55Vrms tone from a 600 Ohm
source across Wireline Connector’s LINE2+
(J21-4) and LINE2- (J21-5). Short Accessory
Connector’s PTT* (J104-10) to ground.
Does the
Consolette key up and
begin transmitting?
Is the Consolette
TX dev. 60% of rated
system deviation?
STOP
Yes
Does U1809-16 on the
Consolette Mainboard
measure ~0Vdc (GND)?
No
Yes
No
Yes
No
Yes
No
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting.
Does U1809-4
measure ~0Vdc
(GND)?
Verify PTT* (J104-10) is
being routed properly
through the low speed
board & flex cable to
U1809-4.
Reprogram/Replace
Consolette Mainboard.
Replace U1809.
Is the APX7500 mobile
operating properly?
Refer to the APX7500
Detailed Service
Manual for correct
operation and
troubleshooting.
Is the Wireline In (TX) Gain
Setting in the Consolette
Configuration properly tuned?
Refer to the “Transmit
Audio Tuning – Wireline”
section of the manual.
Is there a 1kHz, ~90mVrms
tone at U1801-14 on the
Consolette Mainboard?
Reprogram/Replace
Consolette Mainboard.
Verify C1828, C1852, R2850,
R2849, C1877, C1878 & U1801
are placed properly & the
resistor values are correct.
Replace U1801.
~450mVrms
tone not present
Is there a 1kHz,
~450mVrms tone at
R1836?
Is ~1.35Vdc
present at U1801-12 &
~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.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Содержание APX 7500
Страница 1: ...APX TWO WAYRADIOS APX 7500 MULTI BAND CONSOLETTE DETAILED SERVICE MANUAL ...
Страница 4: ...Notes ...
Страница 96: ...September 9 2011 68009482001 4 26 Feature Operation Emergency Notes ...
Страница 116: ...September 9 2011 68009482001 6 10 Cabling Diagrams and Rear Panel Rear Panel Connector Pin Descriptions Notes ...
Страница 156: ...September 9 2011 68009482001 7 40 Troubleshooting Charts and Error Codes Troubleshooting Charts Notes ...
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