Denon DVD-3800 Service Manual page 14

A
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.
Check IC109→IC113→IC112→IC111
No
(see Schematic Diagram) on Main PWB
(GU-3389).
Check soldering of IC106, IC703, IC706
and IC101 on Main PWB (GU-3389),
No
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
No
replace if NG.
Check soldering of IC706, and replace
No
if NG.
No Check soldering of R637 and IC101
(145) pin on Main PWB.
→ Perform re-soldering.
DVD-3800
14