DCR-DVD305 (serv.man3) - Sony Movie Service Manual (repair manual). Page 73

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DCR-DVD305

Terms
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)

Purpose

Initialize adjustment data

Power meter Q8230 initialization

Trouble Symptom

Cause

Faulty Flash IC

Faulty connection to power
meter

Repair

Replace the VC board

Check connection to power
meter, Check power supply

Purpose

Adjust the read power

Trouble Symptom

Cause

Faulty connection to power
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

Purpose

Adjust the DVD-R write power

Trouble Symptom

Cause

Faulty connection to power
meter
Faulty installation of power
sensor jig
OP

RF IC
DSP IC

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

Purpose

Adjust DVD-R OFF power
(cooling power)

Trouble Symptom

Cause

Faulty connection to power
meter
Faulty installation of power
sensor jig
OP

RF IC
DSP IC

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

Purpose

Adjust the erase power of
DVD-RW/DVD+RW

Trouble Symptom

Cause

Faulty connection to power
meter
Faulty installation of power
sensor jig
OP

RF IC
DSP IC

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