-
27
-
C.
Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
D. Check the capacitors C19 and the diode D6 to see if the reset circuit works normally.
E
.
If the above actions are not working, replace the Main Board.
DVD ROM
A.
Check the loader to see if it is not stable (any condition that some of the discs
can’t be played). If so, replace the loader.
DVD DISC
A.
Check the Test Disc to see if there is any serious scratch or ring shape, circular
shape scratches, if so, replace the Test Disc and test again.
T08
Power on unstable
Main Board
A.
Remove the top cover, check all flat cables in the system to see if they are
correctly plugged to the fixed positions, or re-plug them.
B.
Check the LDO Q3 to see if it works normally with a 1.8
V
output voltage.
C. Check the reset circuit refer to the title T07-D.
D
.
If the above actions are not working, replace the Main Board.
T09
Abnormal sound in the machine base (Power on abnormal sound)
DVD ROM
A.
Check the loader to see if it is the source of the abnormal sound. If so, replace
the loader.
B. If the abnormal sound comes from the audio speakers, check the audion PNP3906
T11
Disc drive can’t read (NO DISC)
Main Board
A.
Remove the top cover, check the 28-pin flat cable in the system to see if they
are correctly plugged to the fixed positions, or re-plug them.
B.
Check the resistors or resistor-array adjacent to U38 and U17 to see if there is
any hollow soldering or cold soldering.
type Q16 and NPN 3904 type Q8/9/10/12/13/15 to confir
m
the mute circuit works
normally. If not ,change the audion.
C
.
If the above actions are not working, replace the Main Board. If it is still not
working, replace the loader.
DVD ROM
A.
Check the loader to see if it can’t read. If so, replace the loader.
T12
Disc drive no action or locked
Main Board
A.
Remove the cover. Check to see if it is caused by mis-assembly.
B.
Check the resistors or capacitors adjacent to U38 to see if there is any hollow
soldering or cold soldering.
C.
If the above actions are not working, replace the loader. If it is still not working,
Summary of Contents for DPC-7900 Series
Page 1: ...Portable DVD NOV 2006 DPC 7900 Series OSDPC79001...
Page 17: ...14 4 3 Exploded View 4 3 1 DVD Door Mainbody_top module...
Page 18: ...15 4 3 Exploded View 4 3 2 Keyboard Mainbody_top module...
Page 19: ...16 4 3 Exploded View 4 3 3 Mecha Mainbody_bottom module...
Page 20: ...17 4 3 Exploded View 4 3 4 Mainbody module...
Page 21: ...18 4 3 Exploded View 4 3 5 Display module Mainbody module...
Page 22: ...19 5 Regulatory Standards 5 1 Safety UL FDA 5 2 EMI CE FCC 5 3 Ergonomics Dolby LVD...
