LG RH7521W Service Manual page 107

3) Layout of DVD+RW disc
Disc Center
Diameter 44mm
Diameter 33mm
Diameter 22mm
Diameter 16mm
Diameter 15mm
Center
hole
1th transition area
2th transition area
Lead-in Zone
Inner Disc Inner Disc
Count Zone
Test Zone
in
PSN :
2A480H 2A7C80H
Inner Disc Test Zone : fo r performing OPC procedures.
Inner Disc Count Zone : For counting the number of OPC algorithm performed in IDT Zone.
Outer Disc Test Zone :
Outer Disc Co unt Zone :
Diameter 120 mm
Clamping 3th transition
Zone area
2DC80H 30000H
for performing OPC proc edures.
For counting t he number of OPC algorithm perf ormed in IDT Zone.
Inform ation Zone
Unrecorded Disc
Data Zone
260540H
Lead-out Zone
Outer Disc
Outer Disc
Test Zone Count Zone
265940H
266140H
262940H
Rim
area
out