This manual is a complete guide, including later additions. It has all the necessary information about the replacement items. The material quality is great to read.
Text excerpt from page 65 (click to view)
SA-HT740P / SA-HT740PC
Step 2 Remove Drive Gear (A) and Drive Gear (B).
Step 3 Release the 2 claws in the direction of arrow (1), and then push the pulley pin in the direction of arrow (2).
10.18.2. Disassembly of the Loading Motor P.C.B.
Step 1 Remove 2 screws.
10.18.4. Disassembly of Fixed Plate, Magnet and Clamper
Release 3 claws in the direction of arrow.
Step 2 Remove Loading Motor P.C.B.
10.18.3. Disassembly of the Drive Gear (A) & (B)
Step 1 Release the claw in the direction of arrow (1), and then push drive gear shaft up.
10.18.5. Disassembly of Cam Gear & Support Piece
Step 1 Rotate (A) in cam gear anti-clockwise.