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KX-MB2085CXW/KX-MB2090CXW

12.3.6. CALL SERVICE Troubleshooting Guide

Call Service related error is most frequent.

Call Service 1 ----- Polygon doesn’t rotate......... Refer to

LSU (Laser Scanning Unit) Section

(P.44).

• First, listen to the sound. If rotation sound isn't heard, check 24V line, POLON signal and POLCLK signal. If even a little of sound

is heard, check XREADY signal.

Call Service 2 ----- Laser isn't output.......... Refer to

LSU (Laser Scanning Unit) Section

(P.44)

• This can be judged only by referring to signal. Check 5V line, XHSYNC, XAPC, XVIDEO, XLDON.

Call Service 3 ----- Detection of fixing temperature.......... Refer to

Heat Lamp Control Circuit

(P.59)

• *Service mode *655 tells the detection number and 3 latest temperatures of the thermistor. The detection point of the Call Ser-

vice 3 and the thermistor temperature is displayed. Maximum 3 latest temperatures are displayed showing the newest on the left.
[AABB CCDD EEFF] AA, CC and EE show the detection points and BB, DD and FF show their temperature detection points.
00: CALL SERVICE 3 was not occurred.
01: means that the value of AD did not increased by 4 steps or more within 10 sec soon after the heater was turned ON. (ther-
mistor’s open detection)
02: means that it did not reach the first stabilizing temperature (170

C: 77h) within 50 seconds.

03: means that it did not reach the second stabilizing temperature (200

C: 4Fh)* within 75 seconds after reaching the first stabi-

lizing temperature (170

C: 77h).

04: means that it dropped to -40 deg or below by the temperature control after reaching the second stabilizing temperature
(200

C: 4Fh)*.

05: means that it did not reach the first stabilizing temperature (170

C: 77h) within 35 seconds from detection temperature 1

(70

C: F1h).

06: means that it became 235

C: 2Fh or over during printing.

07: means that during printing the short of the thermistor (AD: 00h) was detected.
08: means that the thermistor’s short (AD: 00h) were detected.
09: means that it became 235

C: 2Fh or over during sleep condition (heater OFF).

*: depend on its printing conditions (room temperature, number of printing, printing paper size etc.).

<Note>

Call Service 4 ----- Rotation of Fan.......... Refer to

FAN Motor Section

(P.40)

• Connector isn’t inserted firmly, dust is caught in and the fan is broken.
• Rotation of the Fan can be confirmed by following Test Mode.

Service mode *677
:1... Normal operation (default)
:2... Right Fan & Left Fan ON (High speed)
:3... Right Fan & Left Fan ON (Low speed)
:4... Both Fan OFF

Call service 5 ----- Rotation of Engine motor.......... Refer to

Motor Drive Section

(P.33)

• Engine motor’s rotation detection signal LD did not become Low within rated speed ±6.25%.
• Service mode *556: the operation of Main Motor can be checked by pressing 0 and SET buttons.

Call service 6 ----- Detection of Charger error.......... Refer to the

H.V.P.S. (High Voltage Power Supply) Section

(P.57)

• Breaking of charger’s wire of drum cartridge and/or loose connection of High voltage terminals (CHRG, GRID).
• First, replace the drum cartridge even so, it doesn’t function check the high voltage power supply.

* As for Call Service 1, 2, 4, 5 and 6, turn the power OFF then ON to restart.

Once “CALL SERVICE3” is displayed, it does not disappear until the Factory Setup or Service Function #529 is

executed.

Therefore Service Function #529 should not be executed before the confirmation, and #529 should be done after the countermea-
sure.