Sony DCR-DVD105 (serv.man3) Service Manual ▷ View online
6-58
DCR-DVD105
START button
Status lamp
Adjustment buttons
2-7.
DVD+RW ADJUSTMENT
2-7-1.
Menu in DVD+RW Adjustment Section
START button:
All items of adjustment buttons are ex-
ecuted in the descending order.
ecuted in the descending order.
Adjustment button:
Only the adjustment item assigned to the
button name is executed.
button name is executed.
Status lamp:
Adjustment status is displayed with color.
White ················ Not adjusted
Red blinking ···· Adjustment in progress
Green ················ Adjustment OK
Red ··················· Adjustment NG
White ················ Not adjusted
Red blinking ···· Adjustment in progress
Green ················ Adjustment OK
Red ··················· Adjustment NG
Fig. 6-2-15
Order
1
2
3
4
5
Diagnostic item
Wobble BPF
Center
Jiter & BLER
Data Dump
Operation
Click the
[START]
button of “DVD+RW Ad-
justment”.
Set the DVD+RW Reference Disc, and then
close the disc cover and click the
close the disc cover and click the
[OK]
but-
ton in the message window.
(If the adjustment result of previous item is
OK, this item is executed successively.)
OK, this item is executed successively.)
(If the adjustment result of previous item is
OK, this item is executed successively.)
OK, this item is executed successively.)
Remove the DVD+RW Reference Disc.
(On the AUDIT screen, if the status lamps of
respective adjustment buttons are all lit in
green, the adjustment is over.)
(On the AUDIT screen, if the status lamps of
respective adjustment buttons are all lit in
green, the adjustment is over.)
Message
Disc
No Disc
DVD+RW
Reference Disc
Reference Disc
No Disc
2-7-2.
Adjusting Method
Note:
Before exiting the AUDIT, click the
[SET]
button of “After completing the TEST” to cancel the TEST mode.
6-59
DCR-DVD105
2-8.
TROUBLESHOOTING
2-8-1.
Fundamental Troubleshooting Flow
Yes
No
No
Yes
End
OK?
Execute <ADJUST>
Faulty part isolation processing
OK?
Execute <DIAGNOSIS>
Initial inspection
VC Board recovery processing
Yes
No
OK?
Execute <ADJUST>
(MD Block is faulty)
Return to initial inspection
Replace MD Block
Faulty part isolation processing
6-60
DCR-DVD105
Priority varies depending on the isolated item
Execute <ADJUST>
Restore original MD Block
Replace Driver IC
Replace DSP IC
Yes
No
End
OK?
Execute <ADJUST>
Replace RF IC
VC Board recovery processing
6-61
DCR-DVD105
2-8-2.
Diagnosis
Terms
FE: Focus Error
FE: Focus Error
TE: Tracking Error
PD: Photo Detector
BLER: Block Error Rate
Wobble: Meander of a guide groove made in a disc in advance. The address information, etc. can be obtained by the wobble.
DPP: Differential Push Pull (A method for detecting the TE)
DPP: Differential Push Pull (A method for detecting the TE)
-R Seek
Purpose
Check the seek performance
when DVD-R disc is used
(Seek between 2 points) x 6 x 2
patterns = Total time
when DVD-R disc is used
(Seek between 2 points) x 6 x 2
patterns = Total time
Trouble Symptom
Cause
MD block
VC board
VC board
Repair
Replace and readjust
Replace and readjust
Replace and readjust
-R Read
Purpose
Check the read performance
when DVD-R disc is used
RF Jitter (DSP Jitter), BLER,
LPP Error
when DVD-R disc is used
RF Jitter (DSP Jitter), BLER,
LPP Error
Trouble Symptom
Cause
OP age-based change
VC board
VC board
Repair
Readjust
Readjust
Readjust
-R Write
Purpose
Check the write performance
when DVD-R disc is used
Wobble Jitter, RF Jitter (DSP
Jitter), BLER
when DVD-R disc is used
Wobble Jitter, RF Jitter (DSP
Jitter), BLER
Trouble Symptom
Cause
OP age-based change, Faulty
mechanism
mechanism
Repair
Readjust
Jitter NG
Jitter NG
→
Replace MD
Jitter OK, Wobble NG
→
Readjust
→
NG
→
Replace MD
-RW Seek
Purpose
Check the seek performance
when DVD-RW disc is used
(Seek between 2 points) x 6 x 2
patterns = Total time
when DVD-RW disc is used
(Seek between 2 points) x 6 x 2
patterns = Total time
Trouble Symptom
Cause
Repair
-RW Read
Purpose
Check the read performance
when DVD-RW disc is used
RF Jitter (DSP Jitter), BLER,
LPP Error
when DVD-RW disc is used
RF Jitter (DSP Jitter), BLER,
LPP Error
Trouble Symptom
Cause
Repair
-RW Write
Purpose
Check the write performance
when DVD-RW disc is used
Wobble Jitter, RF Jitter (DSP
Jitter), BLER
when DVD-RW disc is used
Wobble Jitter, RF Jitter (DSP
Jitter), BLER
Trouble Symptom
Cause
Repair
Sensor
Purpose
Check various sensors
(Dew sensor, Temperature
sensor, Shock sensor)
(Dew sensor, Temperature
sensor, Shock sensor)
Disc type check
Trouble Symptom
Cause
CPU port broken
Faulty sensor
Faulty sensor
Both mechanism and board
Repair
Replace the board
Temperature sensor
Temperature sensor
→
OP
Dew sensor
→
Connector
Shock sensor
→
DSP IC, Sen-
sor
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