KX-MB1500RUB, KX-MB1500RUW, KX-MB1520RUB, KX-MB1520RUW, KX-MB1500RUD - Panasonic Fax Service Manual (repair manual). Page 115

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KX-MB1500RUB/KX-MB1500RUW/KX-MB1520RUB/KX-MB1520RUW

Call Service 1 ----- Polygon doesn’t rotate......... Refer to LSU (Laser Scanning Unit) Section (P.49).

• 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.49)

• 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.60)

• *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: 3Dh) within 50 seconds.

03: means that it did not reach the second stabilizing temperature (205

°C: 20h)* within 75 seconds after reaching the first stabi-

lizing temperature (170

°C: 3Dh).

04: means that it dropped to -40 deg or below by the temperature control after reaching the second stabilizing temperature
(205

°C: 20h)*.

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

°C: 3Dh) within 35 seconds from detection temperature 1

(70

°C: DAh).

06: means that it became 235

°C: 13h 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: 13h or over during sleep condition (heater OFF).

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

Call Service 4 ----- Rotation of Fan.......... Refer to FAN Motor Section (P.44)

• 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

* As for Call Service 1, 2, 4, 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.