Adj 1] High Voltage Adjustment - Sharp AR-BC260 Service Manual

ADJ 1 High voltage adjustment
Since the output voltage cannot be checked directly due to the
machine structure, the adjustment value of the simulation is set to
the default (specified value) to perform the adjustment.
ADJ 1A Main charger grid voltage adjustment
This adjustment must be performed in the following cases:
• When the high voltage power PWB is replaced.
• When a U2 trouble occurs.
• When the PCU PWB is replaced.
• When the EEPROM of the PCU PWB is replaced.
Color Item
K A: HIGH SPEED High speed (117mm/s) (B & W)
B: MIDDLE SPEED Middle speed (78mm/s) (Color) (B & W) 180 – 700
C: LOW SPEED Low speed (58.5mm/s) (Color) (B & W)
(Special paper)
C A: MIDDLE SPEED Middle speed (78mm/s) (Color) (B & W) 180 – 700
B: LOW SPEED Low speed (58.5mm/s) (Color) (B & W)
(Special paper)
M A: MIDDLE SPEED Middle speed (78mm/s) (Color) (B & W) 180 – 700
B: LOW SPEED Low speed (58.5mm/s) (Color) (B & W)
(Special paper)
Y A: MIDDLE SPEED Middle speed (78mm/s) (Color) (B & W) 180 – 700
B: LOW SPEED Low speed (58.5mm/s) (Color) (B & W)
(Special paper)
Remark: When the default value is set, the specified voltage is
outputted.
There is, therefore, no need to check the output voltage
unless there is a doubt for any abnormality in the output
voltage.
If there is a need to check that the normal voltage is out-
putted or to adjust by referring to the output voltage, use
the method below.
1) Remove the rear cover of the machine.
2) Remove the image process fan motor and the duct.
B
Operation mode
Adjustment
180 – 700
180 – 700
180 – 700
180 – 700
180 – 700
A
AR-BC260 SETTING AND ADJUSTMENTS 8 - 2
1) Enter the SIM 8-2 mode.
SIM 8-2
2) Select the output mode to be adjusted with the color key and
scroll key.
3) Enter the adjustment value (specified value), and press the
[OK] key.
By entering the default value (specified value), the specified
voltage is outputted.
Main charger grid voltage
Adjustment value
Monitor (High voltage PWB)
Specified
Monitor voltage
value
range (Specified value)
(Default)
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
620 53.5 ± 0.2v
3) Connect the high voltage adjustment harnesses (DHAi-
3471FCZZ/DHAi-3472FCZZ) with the connectors CNMON
and CNMONK on the high voltage PWB.
4) Enter the SIM8-2 mode.
5) Select the output mode to be adjusted with the color key and
the scroll key.
6) Check that the pin numbers of the connectors CNMON and
CNMONK are properly assigned to the connector pin numbers
of the high voltage adjustment harness.
7) Apply a digital multi-meter to the connector pins of the high
voltage adjustment harness corresponding to the output mode
to be adjusted.
Pin Actual
No. voltage
Connector
CNMONK 1 –620v
CNMONK 1 –620v
CNMONK 1 –620v
CNMON 3 –620v
CNMON 3 –620v
CNMON 7 –620v
CNMON 7 –620v
CNMON 11 –620v
CNMON 11 –620v