Canon iR C3380 series Service Manual page 106

Chapter 2
If the position of the switch does not match the transfer speed, the voice is not correctly played such as the interruption.
If you move the switch by mistake, be sure to return it to the correct position. In this machine, the switch should be positioned at 66MHz.
6) Connect the voice operation board [1] to the connector of the main controller PCB.
When inserting the board into the connector, be sure that the board is vertical against the connector.
7) Fix the voice operation board [1] with two screws [2] removed in the step 4).
8) Attach the cover in the opposite step from the one for detaching.
- controller box cover
- rear upper cover
9) Fix two cables removed in the step 1) with wire saddle.
2-50
33MHz
66MHz
F-2-144
[1]
F-2-145
[1]
F-2-146
[2]
[2]