Denon DVD-3800 Service Manual page 14

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There is something wrong in Main PWB
(GU-3389).
→ Check 11MHz input of IC101 (39) pin/
MCLK.
There is something wrong in Main PWB
(GU-3389).
→ Check if CLOCK and DATA signals of
ICBUS are output on IC101 (160) pin/
AUX0, (161) pin/AUX1 when the power
is on.
Check soldering of IC101 (208 pins) on
Main PWB (GU-3389).
→ Perform re-soldering.
Caused by Main PWB (GU-3389).
→Check 20MHz output on IC703(10) pin.
Caused by Main PWB (GU-3389).
→Check 27MHz input on IC706 (32) pin.
Check RESET 5V output of IC511 (30)
pin on Main PWB.
Check Laser drive current/HF wave form.
Criterion: Iop is less than 1.5 times of its
initial value.
Replace Traverse Unit.
Write Iop after replacing the unit.
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8
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DVD-3800
9 4 2 8
Check IC109→IC113→IC112→IC111
(see Schematic Diagram) on Main PWB
(GU-3389).
Check soldering of IC106, IC703, IC706
and IC101 on Main PWB (GU-3389),
and change IC101 if it's NG. Change
IC106, then IC703 and IC706 if it's still
NG. Finally, change IC601 on Video
PWB (GU-3438-2) if still NG.
Check soldering of IC703 and X701, and
replace if NG. 0 5 8 2 9 9 4 2 8
Check soldering of IC706, and replace
if NG.
Check soldering of R637 and IC101
(145) pin on Main PWB.
→ Perform re-soldering.
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