KIP 9000 Service Manual page 175

2. Output both positive Cleaning Roller Bias (outputted during Print Cycle) and negative one
(outputted during Toner Collection Process).
Measure both positive and negative voltages with multi-meter. (Refer to the following NOTE for
the way to output both Bias.)
The standard value of positive Cleaning Roller Bias and negative one are as follows.
Positive Cleaning Roller Bias
Negative Cleaning Roller Bias
NOTE
The polarity of Cleaning Roller Bias is "positive" normally.
(1) To output the positive Cleaning Roller Bias, enter the
Service Mode, select the Function Checking Mode (Sub
Mode No.3), and then select the Signal Code "74"
(HV5 : Cleaning Roller Bias Control Signal).
Press the [ENTER] Key to output the positive Bias.
(2) It is impossible to output the negative Cleaning Roller Bias for checking purpose as the
Service Mode does not have such item.
Make a print (including test print) and measure the negative Cleaning Roller Bias that is
outputted for a short period when the printer is in almost final stage of print cycle. (This is
only the way to measure the negative bias.)
3. If the negative Cleaning Roller Bias does not satisfy -500V +-/3V, readjust it to satisfy the
requirement.
To adjust the negative Cleaning Roller Bias, rotate the VR1 on the HVP5 with a screwdriver.
+800V +/-3V
-500V +/-3V
GND
Multi-meter
(DC volt range)
4-77
MENU ENTER ONLINE
K115sm4ea.doc