Read Sony DCR-DVD405 (serv.man3) Service Manual online
6-74
DCR-DVD404E/DVD405/DVD405E/DVD805/DVD805E_ADJ
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
OP
OP
Repair
Replace IC
Replace MD block
Replace MD block
Jitter & BLER
Purpose
Measure DVD+RW self
recording jitter and BLER
recording jitter and BLER
Trouble Symptom
Cause
OP
RF IC
RF IC
Repair
Replace IC
Replace MD block
Replace MD block
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