68009482001 September 9, 2011
Troubleshooting Charts and Error Codes Troubleshooting Charts 7-29
Figure 7-27. 2-Wire Wireline TX Audio - C
~450mVrms tone not
present at U1808-8
Is there a 1kHz tone
greater than 350mVrms
at T1801-6?
Is T1801 placed
properly?
Replace T1801.
Place T1801 in its correct orientation
and verify all pins are making proper
contact with their solder pads.
No
Yes
Is there continuity
between K1801-3 &
K1801-4?
Verify K1801, R2838,
Q1812, C1870, R1831 &
R1857 are placed properly
& resistor values are
correct.
Does Q1812-3
measure ~1.1Vdc?
Does Q1812-2
measure ~2.8Vdc?
Replace Q1812.
Reprogram/Replace
Consolette Mainboard.
Yes
No
Does K1802-1
measure ~2.3Vdc?
No
There may be an issue with
the internal board routing of
VCC_5V.
No
Replace K1802.
Yes
Yes
Yes
No
No
Verify LINE1+ (J21-3) & LINE1-
(J21-6) are being routed
properly through the high speed
board & flex cable to C1862 &
T1801-3 respectively.
Yes
Is there a 1kHz tone
greater than 600mVrms at
T1801-1?
Verify C1862 & C1863
are placed properly.
No
No
Yes
Yes
Verify C1838, C1839, R1827,
R1828, R1829, R1830 & U1806
are placed properly & the
resistor values are correct.
Is ~4.5Vdc
present at U1806-10 &
~9.6Vdc present at
U1806-4?
There may be an issue with the
internal board routing of 4.8V_WL
and/or 9.6V_WL.
Is there a 1kHz,
~450mVrms tone at
T1801-6?
Replace U1806.
Does T1801-5
measure ~13.1Vdc?
Verify VR1802, VR1803,
R1844, K1801, R2838, C1830
& C1829 are placed properly &
resistor values are correct.
Verify T1801 is placed
properly. There may be
an issue with the internal
board routing of A+.
Yes
Yes
No
No
Yes
No
Do high speed board conn
pins J21-3 & J21-6 have continuity
w/ Mainboard’s C1862 &
T1801-3 respectively?
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