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45584901TH Rev.1

5-40 /

Oki Data CONFIDENTIAL

5.3.4 Communication related service call

[F070] Communication error between CU board and PU board

Classiﬁcation Error content

Communication related

service call

Communication error between CU board and PU board

Check item Measures

Error code • TurnthepowerOFFandthenbackONusingthemainpowerswitch,

and then check if the error code changes to another one.

• Ifitchangestoanotherone,followtheprocedureforthechangederror

code.

Check ﬁrmware version • ChecktheversionofthesystemrmwareontheCUboard.

• ChecktheversionofthePUrmwareonthePUboard.

Board check • CheckiftheconnectorCN118,CN119ontheCUboardandthe

connectorCUIF0,CUIF1onthePUboardarecompletelyinserted.

• CheckiftheconnectorpinbetweentheCUboard(connectorCN118,

CN119)andthePUboard(CUIF0,CUIF1)isdisconnected.

• CheckiftheconnectorsHEAD0K,HEAD1Y,HEAD2M,andHEAD3C

oftheLEDheadarecompletelyinserted,andtheharnessis

disconnected or open circuited.

• CheckiftheconductorpatternsonthePUboardandCUboardare

short circuited or open circuited

Parts to be replaced Remark

CU board

PU board

LEDhead

Oki MC770 Maintenance Manual

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