Kenwood DV-403 Service Manual page 16

1. Optical Pickup Self-Diagnosis and Replacement Procedure
The optical pickup self-diagnosis function and tilt adjustment check function have been newly added to this player. When
repairing, use the following procedure for effective Self-diagnosis and tilt adjustment.
Be sure to use the self-diagnosis function before replacing the optical pickup when "NO DISC" is displayed. As a guideline, you
should replace the optical pickup when the value of the laser drive current is more than 55.
Note
Press the power button to turn on the power, and check the value before the unit warms up (within three minutes).
9/2-13
page 17/4-2, Handling
5
Press the button on the remote control
unit while pressing the "PAUSE" and
"OPEN/CLOSE"
5
5 button on the
2. Self-Diagnosis Function and Service Modes
2-1 Service Mode Table
The service modes can be activated by pressing various button combinations on the player and remote control unit.
Player Remote control
buttons unit buttons
0 Displaying the UHF display F_ _ _
5
Jitter check,Tilt adjustment
*Jitter value is three digit.
Three digit of right number XXX is not related to jitter
value.
JIT
XXX.....Occurence number of internal read error which is
inclement every time error happens. But this is
not always reflected to picture/sound noise.
PAUSE 6 Checking the region numbers and broadcast system
+ 7 Checking the program version
OPEN/CLOSE
9 Lighting Confirmation Fanction of Display Tube
5
Checking the laser drive current
PAUSE Writing the laser drive current value after replacing
the optical pickup (do not use for anything other than
optical pickup replacement)
PAUSE Initializing the DVD player
4
(restoring factory preset settings)
OPEN/CLOSE *Use when replaceing a microprocessor, microprocessor
peripheral parts, or C.B.A.
2-2 Self-Diagnosis Function (UHF Display)
This unit incorporates a convenient self-diagnosis function for use in troubleshooting.
Display method Display
Service numbers Check the disc Focus error
displayed H01 Tray loading error
during use H02 Spindle servo error
H03 Traverse error
H04 Tracking servo error
H05 Seek error
H06 Power supply error
F0** Disc format error
Press the "0" button
F1** Disc code error
on the remote control
F2** Decoder LSI error
unit while pressing
F3** SDRAM error
the "PAUSE" and
F4** IIC BUS error
"OPEN/CLOSE"
F5** DSC
button on the player.
F6** ECC error
F7** Microprocessor error
F8** Microprocessor error
2-3 Self-Diagnosis Display Function
Check the disc
Application Note
Refer to page16/2-2 Self-
Diagnosis Function (UHF
Display).
Refer to page 9/2-13
Optical Pickup Tilt
Adjustment.
XXX
JITTER VALUE
Check the IC6302
FLASH ROM program.
Refer to page16/1
Optical Pickup
Self-Diagnosis and
Replacement Procedure.
Procedure
Refer to page17/4-1
Initializing the DVD Player
Diagnosis Checkpoints
IC2001,IC2511,IC5201,pickup
IC2001, IC2511, loading motor
Spindle motor, IC2501, IC2001
Stepping motor, IC2511, IC2001
IC2001, IC2501, IC5201, pickup, disc
Stepping motor, IC2511, IC2001
IC1021, IC1121, IC1151, IC6001
If this type of error occurs, refer to
page17/2-4 Examples of Repairs Using
Error Codes.