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2-116 Service Manual

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920.27, 920.28, 920.29—POST (power on self test) service check

925.01, 925.03, 925.05—Fan error service check

Step Questions / actions Yes No

1 Is the specified option the 550-sheet tray? Replace the 550-sheet tray

with a new 550-sheet tray

option.

Go to step 2.

Is the specified option the special media tray? Replace the special media

tray with a new special tray

option.

Go to step 3.

Is the specified option the high-capacity input

tray (HCIT)?

Replace the HCIT

controller board assembly.

See “HCIT controller

board assembly

removal” on page 4-197.

Step Questions / actions Yes No

1 Turn the printer off, and then remove the rear

frame cover. See “Rear frame cover

removal” on page 4-33.

Check the cable in connector JFAN1 (A) for

proper connection to the system board, for

pinch points, and for any other damage to the

cable or the connector.

Is the cable damaged?

Replace the fan. See

“Cooling fan removal” on

page 4-74.

Go to step 2.

Measure the resistance across fuse F5 on the

system board.

Is the fuse blown?

Replace the system board.

See “System board

removal” on page 4-153.

Go to step 3.

1. Disconnect the cable in connector JFAN1,

and connect a new fan.

2. Bring the printer up in Diagnostic menu

(turn off the printer, press and hold and

. and turn on the printer).

Did the error clear?

Replace the cooling fan.

See “Cooling fan

removal” on page 4-74.

Replace the system board.

See “System board

removal” on page 4-153.

JSB1

JBIN1

JFAN1

JFUSER1

JBOR1

JHVPS1

JMIRR1

JBLW1

JCVR1

JLVPS2

JCARTP1

JCARTS1

JCARTS2

JCARTP2

JDVR1

JTPS1

JOPT1

JFDS1

JINT1

JFDPCK1JTRAY1JSEC1

JDX1

JT12

JDIMM1

JOPP1

JT1

JUSB1

JBOOT1

JFMUSB1

J49

JTWF1

JTDBUG1

JTLBT1

JPH1

F10

F12

F13

F14

J10