Ricoh D197 Service Manual page 249

11. Connect the harnesses of the thermostat [A] and of the anti-condensation heater (PCU)
[B] to the harnesses [C] which is routed in step 19 of the procedure for the
Anti-Condensation Heater (Scanner).

You can connect the harnesses [C] up to either the harness [A] or [B].
12. Reattach the development bearing cooling fan, PCDU, waste toner bottle and covers
which have been removed.
SM
Anti-Condensation Heater Type M12
2-179 D197/D198/D199/D200/D201/D202