High Voltage Value Check Point - Panasonic KX-MB2230JT Service Manual

12.3.18. High Voltage Value Check Point

Measurement Procedure
1. Turn off the power supply.
2. Remove the right cover of the main unit and then remove the protection cover of high voltage power supply. See Figure 1.
3. See Figure 2 for the high voltage value check point.
4. Set the drum and developing unit in the main unit. Close the front cover and then turn the power supply on. Be careful not to
touch the main board as it produces high voltage.
5. Let the tip of the high voltage probe touch the value point. At this time, be careful not to touch other parts of the main unit.
6. Remove the recording paper cassette. And then turn the service mode on and input 556.
7. Press SET. The main unit starts producing high voltage.
8. Press STOP when high voltage value check is finished. The main unit stops operating and producing high voltage.
9. Repeat step 5 to 8 to check the value of all points.
10. Put the right cover on when the value check is finished.
Each terminal's output voltage
No. BIAS Name
1 CHG (Charge)
2 GRID(grid)
3 DEV (Developing)
4 TRA (Transfer)
* FLUKE85(MULTIMETER)+HIOKI(HV PROVE 9014)or the equivalent should be used as the high voltage measuring instru-
ment.(Fig.6)
* As for measuring TRA, start measuring within 4 seconds after pressing the SET button. The output value will be changed in 4
seconds.
Fig. 1
Protection cover
Rated Output
200μA
475V
230V
785V
Fig. 2
C H G
G R I D
D E V
T R A
239
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
Rated Output Range
200±15μA Output voltage about 4.1~4.6KV
475±10V
200~300V
785±100V
Fig. 3