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KX-MB1536RU

"CALL SERVICE 1" means that the polygon motor inside the LSU does not rotate.
The rotation of the polygon motor is detected by IC300-H25pin (NREADY).

Refer to LSU (Laser Scanning Unit) Section (P.47) for technical description.

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"CALL SERVICE 2" means that the synchronous signal out of the LSU cannot be detected.
The synchronous signal out of the LSU is detected by IC 300-G23pin. (NHSYNC)

As for the "Pulse" waveform of the above flow chart, see the timing chart in LSU (Laser Scanning Unit) Section (P.47).

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"CALL SERVICE 3" means that the temperature of the fuser does not rise up to or exceed a constant temperature.
The temperature is monitored with the thermistor inside the fuser and detected with the voltage input into IC300-D19.

* When Call Service 3 occurred, the cause can be distinguished by service mode 

655.

•*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 did not occur.
01: means that the value of AD did not increased by 4 steps or more within 10sec soon after the heater was turned ON.
      (thermistor’s open detection)
02: means that it did not reach the first stabilizing temperature (160

°

C: 78h) within 50 seconds.

03: means that it did not reach the second stabilizing temperature (185

°

C: 5Ch)* within 75 seconds after reaching the first

      stabilizing temperature (160

°

C: 78h).

04: means that it dropped to -40 deg or below by the temperature control after reaching the second stabilizing temperature
      (185

°

C: 5Ch)*.

05: means that it did not reach the first stabilizing temperature (160

°

C: 78h) within 35 seconds from detection temperature 1

      (56

°

C: EBh).

06: means that it became 235

°

C: 34h 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: 34h or over during sleep condition (heater OFF).

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

Refer to Heat Lamp Control Circuit (P.60) for technical description.

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"CALL SERVICE 4" means that the FAN does not rotate or the rotation of the FAN cannot be detected normally.

Refer to FAN Motor Section (P.42) for technical description.