Panasonic KX-FLB758RU Service Manual page 92

KX-FLB758RU
6.5.6. 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.183).
· 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.183)
· This can be judged only by referring to signal. Check 5V line, LDEN and VIDEO.
Call Service 3 ----- Detection of fixing temperature.......... Refer to HEAT LAMP CONTROL CIRCUIT (P.199)
· The most possible reason is that connector isn´t engaged firmly. And comparator (IC611) on the digital PCB might be
broken because of static electricity. There are 2 kinds of temperature errors, "low temperature error", which means that low
voltage is input to the comparator and "high temperature error", which means that high voltage is input to the comparator.
· *Service mode *655 tells the detection number and 3 latest temperatures of the thermistor. The detection point of the Call
Service 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: means that CALL SERVICE 3 has not been appeared.
01: means that it did not reach 85°C within 11 seconds since the heater was turned ON.
03: means that it did not reach the secondary stabilizing temperature (180°C) within 30 seconds from 85°C.
04: means that it became T2-55deg (125°C or below) after T2; the secondary stabilizing temperature (180°C). (The heater
has burnt out.)
05: means that it became over 247°C.
06: means that during printing the SHORT of the thermistor (AD:0FF HEX) was detected.
Call Service 4 ----- Rotation of Fan.......... Refer to FAN MOTOR SECTION (P.180)
· Connector isn't inserted firmly, dust is caught in and the fan is broken.
* As for Call Services 1, 2 and 4, turn the power OFF then ON to restart.
<Note>
Once "CALL SERVICE3" is displayed, the unit does not disappear until the Factory Setup or Service Function #529 is executed.
Therefore Service Function #529 should be executed before the confirmation, and #529 should be done after the countermeasure.
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