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Fault Condition
No power
Fails to read Disc
Unstable picture colours
Wobbly picture or screensaver
Picture freezes
No audio or digital output
Unit stays in standby
Display fails to work
No progressive scan output
Drawer fails to open
No HDCD LED
Issue 3 AV board onwards uses WM8740 DACs these are not interchangeable with
!
the WM8716 as used on early versions of the board.
Due to excessively noisy mechanisms, anti-vibration mounts were fitted as standard
!
from serial number D88V04987.
Drive noise – this model uses an ATAPI DVD drive, due to the speed the drive rotates
!
you will hear the disc rotating especially at the start of any disc.
Mechanisms used
LK
LO
LT
DV88 Service Guide
Fault diagnostics
Action
Check mains fuse
Check power supply rails
Clean laser optic with cleaning disc
Check unit set to the correct region for the disc
Check – laser assembly / mechanism ATAPI connector
Check for dry joints on DSP board connectors CN3,
CN4 and AV board connectors SK1, SK2
Check for dry joints on DSP board connectors CN3,
CN4 and AV board connectors SK1, SK2
Check DSP crystal Y2 – 27Mhz
Check for failure of U8
Check AV board crystals X1, X2
Check for dry joints on DSP board connectors CN3,
CN4 and AV board connectors SK1, SK2
Check that Z4 is not touching the rear panel
Check AV board fuses F1, F2
Check T1 on AV board
Check for dry joints on DSP board connectors CN3,
CN4
Replace U3 on the DSP board and Z1 on the display
board
Check display has not been turned off via the remote
Check display flex foil is fitted correctly
Check Q3 to Q6 on the display board
Check for dry joints around Z1 on the display board
Is the Progressive scan board fitted
Check the flex foil is correctly fitted
Check in the setup menu that the progressive board is
enabled
Check unit has latest software version
Region 2 PAL discs will not give progressive output
( due to current licensing rules )
Check drawer is not jammed
Check connecting ribbon and PSU lead to mechanism
Check display flex foil
Check that load button is not jammed
Check LED light pipe is fitted correctly
Check that the HDCD position on the front panel is not
obscured by paint on the inside of the panel
Hints & tips
Serial number range
D88V01000 to D88V01199
D88V01200 to D88V05622
D88V05623 to date
Latest firmware issued
LK18
LO14
LT21
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