Sony DCR-DVD403 / DCR-DVD403E / DCR-DVD803 / DCR-DVD803E (serv.man3) Service Manual ▷ View online
6-65
DCR-DVD403/DVD403E/DVD803/DVD803E
2-8-4.
DVD-R Adjust
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)
OP Sensitivity
Purpose
Adjust the gain of main beam
to correct the dispersion in OP
sensitivity
to correct the dispersion in OP
sensitivity
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Offset Adjust
Purpose
Cancel the FE/TE offset that
occurs in OP, RF amplifiers
occurs in OP, RF amplifiers
Trouble Symptom
Cause
RF IC
DSP IC
OP
Driver IC
DSP IC
OP
Driver IC
Repair
Wobble BPF Center
Purpose
Adjust the RF AMP wobble
BPF center frequency that
causes the dispersion in wobble
delay amount
BPF center frequency that
causes the dispersion in wobble
delay amount
Trouble Symptom
Cause
RF IC
OP
OP
Repair
FE Balance
Purpose
Adjust the gain balance between
+ side and - side of PD Focus
Error
+ side and - side of PD Focus
Error
Trouble Symptom
Cause
OP
RF IC
DSP IC
Driver IC
RF IC
DSP IC
Driver IC
Repair
Write FE Balance
Purpose
Adjust to the FE balanced value
that minimizes the wobble jitter
that minimizes the wobble jitter
Trouble Symptom
Cause
OP
RF IC
DSP IC
RF IC
DSP IC
Repair
Disc Distinction Threshold
Purpose
Adjust the threshold to
distinguish a disc
distinguish a disc
Trouble Symptom
OK at all times
Cause
Repair
Servo Adjust
Purpose
Adjust DPP balance, TE
balance, FE gain, and TE gain
balance, FE gain, and TE gain
Trouble Symptom
Cause
OP
DSP IC
RF IC
DSP IC
RF IC
Repair
Jitter & BLER
Purpose
Measure DVD-R self recording
jitter and BLER
jitter and BLER
Trouble Symptom
Cause
OP
DSP IC
RF IC
DSP IC
RF IC
Repair
6-66
DCR-DVD403/DVD403E/DVD803/DVD803E
2-8-5.
DVD-RW Adjust
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)
OP Sensitivity
Purpose
Adjust the gain of main beam
to correct the dispersion in OP
sensitivity
to correct the dispersion in OP
sensitivity
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Offset Adjust
Purpose
Cancel the FE/TE offset that
occurs in OP, RF amplifiers
occurs in OP, RF amplifiers
Trouble Symptom
Cause
RF IC
OP
OP
Repair
FE Balance
Purpose
Adjust the gain balance between
+ side and - side of PD Focus
Error
+ side and - side of PD Focus
Error
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Write FE Balance
Purpose
Adjust to the FE balanced value
that minimizes the wobble jitter
that minimizes the wobble jitter
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Servo Adjust
Purpose
Adjust DPP balance, TE
balance, FE gain, and TE gain
balance, FE gain, and TE gain
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Disc Distinction Threshold
Purpose
Adjust the threshold to
distinguish a disc
distinguish a disc
Trouble Symptom
OK at all time
Cause
Repair
Write Offset
Purpose
Cancel the FE, TE offset of
write power
write power
Trouble Symptom
OK at all times
Cause
Repair
Jitter & BLER
Purpose
Measure DVD-RW self
recording jitter and BLER
recording jitter and BLER
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
6-67
DCR-DVD403/DVD403E/DVD803/DVD803E
2-8-6.
DVD+RW Adjust
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)
Wobble BPF Adjust
Purpose
Adjust the RF AMP wobble
BPF center frequency that
causes the dispersion in wobble
delay amount
BPF center frequency that
causes the dispersion in wobble
delay amount
Trouble Symptom
Cause
RF IC
Repair
Jitter & BLER
Purpose
Measure DVD+RW self
recording jitter and BLER
recording jitter and BLER
Trouble Symptom
Cause
Repair
6-68
DCR-DVD403/DVD403E/DVD803/DVD803E
6-3. SERVICE MODE
3-1.
ADJUSTMENT REMOTE COMMANDER
The adjustment remote commander is used for changing the cal-
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
culation coefficient in signal processing, EVR data, etc. The ad-
justment remote commander performs bi-directional
communication with the unit using the remote commander signal
line (LANC). The resultant data of this bi-directional communica-
tion is written in the non-volatile memory.
1.
Using the Adjustment Remote Commander
1) Connect the adjustment remote commander to the LANC ter-
minal.
2) Set the HOLD switch of the adjustment remote commander to
“HOLD” (SERVICE position). If it has been properly con-
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-3-1.
nected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-3-1.
Fig. 6-3-1
3) Operate the adjustment remote commander as follows.
•
Changing the page
The page increases when the EDIT SEARCH+ button is
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
The page increases when the EDIT SEARCH+ button is
pressed, and decreases when the EDIT SEARCH– button is
pressed. There are altogether 16 pages, from 0 to F.
•
Changing the address
The address increases when the FF (M) button is pressed,
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
The address increases when the FF (M) button is pressed,
and decreases when the REW (m) button is pressed. There
are altogether 256 addresses, from 00 to FF.
•
Changing the data (Data setting)
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
•
Writing the adjustment data
The PAUSE button must be pressed to write the adjustment
data in the nonvolatile memory. (The new adjusting data will
not be recorded in the nonvolatile memory if this step is not
performed)
The PAUSE button must be pressed to write the adjustment
data in the nonvolatile memory. (The new adjusting data will
not be recorded in the nonvolatile memory if this step is not
performed)
4) After completing all adjustments, turn off the main power sup-
ply (8.4 V) once.
Page
Data
Address
Hexadecimal
notation
notation
LCD Display
Decimal notation
conversion value
conversion value
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 1 2 3 4 5 6 7 8 9 A b c d E F
0 1 2 3 4 5 6 7 8 9 1011 12 1314 15
2.
Precautions Upon Using
the Adjustment Remote Commander
the Adjustment Remote Commander
Mishandling of the adjustment remote commander may erase the
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
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