September 9, 2011 68009482001
7-32 Troubleshooting Charts and Error Codes Troubleshooting Charts
Figure 7-30. 4-Wire Wireline TX Audio - C
~690mVrms tone not present
Is there a 1kHz tone
greater than 600mVrms
at T1800-6?
Is T1800 placed
properly?
Replace T1800.
Place T1800 in its correct
orientation and verify all
pins are making proper
contact with their solder
pads.
No
Yes
Verify C1826, R1818,
K1802 & R2839 are
placed properly & resistor
values are correct.
Is there continuity
between K1802-3 &
K1802-4?
Verify K1802, R2839,
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 LINE2+ (J21-4) & LINE2-
(J21-5) are being routed
properly through the high speed
board & flex cable to C1860 &
T1800-3 respectively.
Yes
Is there a 1kHz tone
greater than 600mVrms at
T1800-1?
Verify C1860 & C1861
are placed properly.
No
No
Yes
Yes
Do high speed board conn.
pins J21-4 & J21-5 have continuity
w/ Mainboard’s C1860 &
T1800-3 respectively?
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