Ricoh D197 Service Manual page 240

Anti-Condensation Heater Type M12
12. Remove the rear right cover [A] ( ×5).
13. Attach the heater board [A] ( x3).
14. Connect the harness [A] to CN904 of the PSU and CN920 of the heater board.
15. Clamp the harness which is connected in step 14 ( ×6).
D197/D198/D199/D200/D201/D202 2-170 SM