Brother MFC-9420CN Service Manual page 38

<Structure of the OPC Belt>
The OPC belt consists of a surface layer having a photoconductor (OPC) of organic material,
the inner layer of an insulator material (PET / Mylar) and an aluminum deposit layer in between.
The OPC belt is located as shown in Fig.3-6 as the main part of the print system.
OPC Belt
Transfer Belt
Charger Roller
Electrode
Belt Cartridge
Fig. 3-6
Photoconductor(OPC)
Aluminum Deposit Layer
Insulator Material
Fig. 3-7
3 - 6
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