Konica Minolta bizhub PRO 1050 Service Manual page 417

Field Service Ver3.0 Nov.2006
5.
Press the Start button to activate the output
check mode. Connect the tester (voltmeter) to
the following positions of the PIDB.
+ terminal: test pin No. TP51 (GAIN) [1]
- terminal: test pin No. TP11 (SGND) [2]
Range: DC 20 V
VR2
[1]
Note
• Because the FD is powered, do not drop
any metal material on the board, or do not
connect the tester pin to an irrelevant ter-
minal.
It may cause the board to short circuit and
be damaged.
6.
In the PIDB volume (VR2), set power voltage to
the standard value.
Standard value: 8.0 ± 0.2 V
7.
Pull out the paper inserted in step 4.
8.
Insert one sheet of paper that customer mainly
use (paper weight 50 to 300 g/m
that the PIDB's LED (LED1) can be turned on.
LED on: no multi feed (0 or 1 sheet of paper)
LED off: multi feed (2 sheets of paper)
9.
Insert another sheet of paper (2 sheets in all),
that customer mainly use, and to see if the LED
is turned off.
10.
In case of detection error, return to step 4 to
conduct the adjustment again. In step 6, set
power voltage to the value 1.0 V lower than the
previous adjustment.
11.
Repeat steps 7 to 10 until detection error is
resolved.
LED1
[2]
fd501fs3007c
2
), and confirm
12.
Pull out the inserted papers, and install the
parts you removed.
I. Adjustment when replacing the multi feed
detection board (PB)
Adjust when replacing the multi feed detection board
of the PB or the PB control board (PBCB). Also, per-
form this adjustment when multi feed of special paper
(thin paper, coated paper with less stiffness, thick
paper) cannot be detected properly.
NOTE
• The multi feed detection board /1 and /2 are
adjusted in the manufacturing process as a
pair of upper and lower. Be sure to replace
them as a pair.
• Adjustment error may occur because of the
temperature of the sensor surface. Make the
adjustment at a temperature close to that in
which the copier is actually used (20 to 30°C).
(In case you brought a new part from out-
doors, make the adjustment after the temper-
ature of the sensor surface and the room
temperature become the same)
(1) Procedure
1.
Replace the multi feed detection board /1, /2.
(See "3.2.24 Removing/reinstalling the multi
feed detection board /1 (MFDTB71) and /2
(MFDTB72)" in Field Service for FB-501)
10. SERVICE MODE
385