Sony DCR-DVD92 (serv.man3) Service Manual ▷ View online
6-61
DCR-DVD92/DVD92E/DVD103/DVD602/DVD602E/DVD653/DVD653E
ANMON & RW Bias Power
Purpose
Adjust the constant for laser
power staring characteristic
when DVD-R writing starts.
Adjust bias power of DVD-RW/
DVD+RW
power staring characteristic
when DVD-R writing starts.
Adjust bias power of DVD-RW/
DVD+RW
Trouble Symptom
Cause
Faulty connection to power
meter
Faulty installation of power
sensor jig
OP
meter
Faulty installation of power
sensor jig
OP
RF IC
WG5
WG5
Repair
Check connection to power
meter, Check power supply
Check installation of power
sensor jig
Check flexible board, Replace
MD block
Replace IC
Replace IC
meter, Check power supply
Check installation of power
sensor jig
Check flexible board, Replace
MD block
Replace IC
Replace IC
RW Peak Power
Purpose
Adjust peak power of
DVD-RW/DVD+RW
DVD-RW/DVD+RW
Trouble Symptom
Cause
Faulty connection to power
meter
Faulty installation of power
sensor jig
OP
meter
Faulty installation of power
sensor jig
OP
RF IC
Repair
Check connection to power
meter, Check power supply
Check installation of power
sensor jig
Check flexible board, Replace
MD block
Replace IC
meter, Check power supply
Check installation of power
sensor jig
Check flexible board, Replace
MD block
Replace IC
Shock Sensor
Purpose
Check operation of Shock
sensor
sensor
Trouble Symptom
Cause
Faulty sensor
CPU port broken
CPU port broken
Repair
6-62
DCR-DVD92/DVD92E/DVD103/DVD602/DVD602E/DVD653/DVD653E
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
6-63
DCR-DVD92/DVD92E/DVD103/DVD602/DVD602E/DVD653/DVD653E
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
6-64
DCR-DVD92/DVD92E/DVD103/DVD602/DVD602E/DVD653/DVD653E
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
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