Panasonic DVD-LS837EEK Service Manual ▷ View online
21
8.16. Service Position
8.16.1. Board Checks
1. Connect the main P.C.B and the traverse assembly with an extension cable.
2. Install the traverse assembly to the tilt adjustment jig using three screws and three washers.
2. Install the traverse assembly to the tilt adjustment jig using three screws and three washers.
Caution:
• Remove the rubber cushion from the traverse assembly to prevent it from getting damaged.
3. Install a dick on the traverse assembly.
Caution:
• Make sure the disk is securely installed on the disk motor.
4. Remove the Main P.C.B., Operation P.C.B., Inverter P.C.B., and LCD panel as shown below.
5. The disc cannot be played back with the disc cover attached. Press and hold down the S5201 and S5202 (Secure with cellu-
5. The disc cannot be played back with the disc cover attached. Press and hold down the S5201 and S5202 (Secure with cellu-
lose tape).
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9 Self-diagnosis Function And Service Mode
9.1.
Optical Pickup Breakdown Diagnosis
As a new feature, this unit has an “optical pick-up problem diagnosis function” and “a tilt adjustment confirmation function” built
in. Use the following procedure to efficiently determine the problem and adjust tilt. If "NO DISC" is displayed, before exchanging
the optical pick-up, carry out problem diagnosis first. If the present laser driving current is over 68, the optical pick-up may need
to be exchanged.
in. Use the following procedure to efficiently determine the problem and adjust tilt. If "NO DISC" is displayed, before exchanging
the optical pick-up, carry out problem diagnosis first. If the present laser driving current is over 68, the optical pick-up may need
to be exchanged.
Note:
Carry out diagnosis within 3 minutes of turning the unit on. (The player’s current can increase as it warms up, so turn the unit off
and allow it to cool down before diagnosis.)
and allow it to cool down before diagnosis.)
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Cautions to be taken when replacing the optical pickup
The optical pickup may break down due to the static electricity of human body. Take proper protection measures against static
electricity before repairing the parts around the optical pickup. (See the page describing the PREVENTION OF STATIC ELEC-
TRICITY DISCHARGE.)
electricity before repairing the parts around the optical pickup. (See the page describing the PREVENTION OF STATIC ELEC-
TRICITY DISCHARGE.)
1. Do not touch the areas around the laser diode and actuator.
2. Do not judge the laser diode with a tester. (The tester will be damaged easily.)
3. It is recommended to use a destaticized soldering iron for short-circuiting or removing the laser diode.
2. Do not judge the laser diode with a tester. (The tester will be damaged easily.)
3. It is recommended to use a destaticized soldering iron for short-circuiting or removing the laser diode.
(Recommended soldering iron) HAKKO ESD Product
4. Solder the land of the flexible cable in the optical pickup.
Note:
• When using a soldering iron which is not destaticized, short-circuit the terminal face of the flexible case with a clip. After that,
short-circuit the land.
• After the repairing work is completed, remove the solder according to the correct procedure shown in this Technical Guide.
9.2.
UHF Displays
Use the internal service mode for evaluation of malfunctions.
Display Method
Display
Diagnosis
Items displayed when in use
CHECK THE
DISC
DISC
Focus error
H01
Inner cover trouble
H02
Spindle servo error
H03
Traverse error
H04
Tracking servo error
H05
Seek error
Press the [PLAY] + [RETURN] + [TOP MENU] buttons on
the unit. Select the “Display Error Code” and press the
“Enter” button.
The last error code generated is saved in the EEPROM
F0**
Disc format error
F1**
Disc code error
F2**
Decoder LSI error
F5**
DSC
F6**
ECC error
F7**
Microcomputer error
F8**
Microcomputer error
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9.3.
Service Mode Table 1
Pressing buttons PLAY, RETURN and TOP MENU at the same time at the unit. Service mode menu will be display.
Select menu by cursor and press the ENTER button to activate the serice modes.
Select menu by cursor and press the ENTER button to activate the serice modes.
9.4.
DVD Self Diagnostic Function-Error Code
Player buttons
Display
Application
Note
SET
PLAY
+
RETURN
+
TOP MENU
Display Error Code
Displaying the UHF display F_ _ _
Refer to section 9.2. Self-
Diagnosis Function (UHF
Display).
Diagnosis Function (UHF
Display).
Display Jitter
Jitter check, tilt adjustment
*Display shows xx_yyyzz
"xx" and "zz" shown to the right have nothing to do with the jitter
value. "xx" is the error counter, while "zz" is the focus drive
value.
Refer to section 11.4. for Optical Pickup Tilt Adjustment
Procedure.
*Display shows xx_yyyzz
"xx" and "zz" shown to the right have nothing to do with the jitter
value. "xx" is the error counter, while "zz" is the focus drive
value.
Refer to section 11.4. for Optical Pickup Tilt Adjustment
Procedure.
Refer to section 11.4.
Optical adjustment.
Optical adjustment.
Display Region
Checking the region numbers and broadcast system
Display Version
Checking the program version
Check the IC3008 FLASH
ROM program.
ROM program.
Lighting Confirmation Function Lighting Confirmation Function of Display Tube
Display DVD/CD LASER
Current
Display DVD/CD LASER
Current
Checking the laser drive current
Refer to section 8.5. Opti-
cal Pickup Replacement
Procedure.
cal Pickup Replacement
Procedure.
Write LASER Current Value
Writing the laser drive current value after replacing the optical
pickup (do not use for anything other than optical pickup
replacement)
pickup (do not use for anything other than optical pickup
replacement)
Error
Code
Error Content
Additional error explanation
Defect 1
Defect 2
Defect 3
Defect 4
U, H error
U11
Focus error
U15
DVD-R not finalized
H01
Tray loading error
H02
Spindle servo error
(Spindle servo, DSC SP motor, CLV servo error)
H03
Traverse servo error
H04
Tracking servo error
H05
Seek error
H07
Spindle motor drive
error
DSC related
error
DSC related
F500
DSC error
DSC stops in the occurrence of servo error (start
up, focus error, etc)
up, focus error, etc)
OPU
DV5.0
(IC3001)
DV5.0
(IC3001)
servo drive
F501
DSC not Ready
DSC-system computer communication error
(Communication failure caused by idling of DSC)
(Communication failure caused by idling of DSC)
DV5.0
(IC3001)
DV5.0
(IC3001)
F502
DSC Time out error
Similar disposal as F500
OPU
DV5.0
(IC3001)
DV5.0
(IC3001)
servo drive
F505
DSC Attention error
Similar disposal as F500
OPU
DV5.0
(IC3001)
DV5.0
(IC3001)
servo drive
F506
Invalid media
Disc is flipped over, TOC unreadable, incompati-
ble disc
ble disc
DISC
DV5.0
(IC3001)
DV5.0
(IC3001)
DV5.0
(IC3001)
ODC related
F600
Access failure to man-
agement information
caused by demodulation
error
agement information
caused by demodulation
error
Operation stopped because navigation data is not
accessible caused by the demodulation defect
accessible caused by the demodulation defect
DV5.0
(IC3001)
DV5.0
(IC3001)
DV5.0
(IC3001)
F601
Indeterminate sector ID
requested
requested
Operation stopped caused by the request to
access abnormal ID data
access abnormal ID data
DV5.0
(IC3001)
DV5.0
(IC3001)
DV5.0
(IC3001)
F602
Access failure to LEAD-
IN caused by demodula-
tion error
IN caused by demodula-
tion error
LEAD IN data unreadable
F603
Access failure to KEY-
DET caused by demod-
ulation error
DET caused by demod-
ulation error
Access failure to CSS data of disc
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