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help me
why vl1m is 170
help me
--------------------------------Originally Posted by freefly
what model ??
what is issue ??/
light copy/dark copy/background/blank copy/error codes ???
**Knowledge is time consuming, exhausting and costly for a trained Tech.**
vl1m indicated the measurement taken of the light are potential for copying. (reference only)
Let me guess....7105. If so might need laser diode assembly...changed quite a few. If other products make sure primary cover is opening laser shutter. VLm being 170 indicates laser is not discharging light area during potential control
medel 7105
Laser assembly.......FM2-8146. Make sure primary cover is opening laser shutter
I have to look like a beginner.
------------------------------
time to learn the copy process for your model /
those numbers mean nothing unless u explain what is going on with your copy quality or test prints/
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VL1M =light area potential measurement value (for copier)
range: 0 to 600; approx. optimum: VL1T +/-6 V
the value indicated is in relation to the most recent potential control / in your case (170)
Is the reading of <VL1M> between 50 and 90?/
in your case answer is "NO"
Check the following; if faulty, replace it:
1. Laser output
The machine determines the optimum laser output so that the drum surface potential (light area potential VL) is identical to the target potential
The machine takes measurements multiple times to determine the relationship between the drum surface potential (VL) and the laser output.If the optimum laser output cannot be determined after measuring the drum surface potential, the machine starts its compensatory control sequence to determine the optimum laser output.
2. Potential control system
The potential control system is associated with the following control items:
[1] Determination of optimum grid bias (VD control)
[2] Determination of optimum laser output (VL control)
[3] Determination of optimum developing bias (DC; Vdc control)
Last edited by teckat; 08-24-2014 at 05:34 PM.
**Knowledge is time consuming, exhausting and costly for a trained Tech.**
Dear sir,
Replace the laser diode. It is available as a separate part: FM2-8146-000000.
Rachid.
"Find a job you love and you’ll never have to work a day in your life." Nagy's father
That is what i said 3 posts ago...part number also....
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