Volume Adjustment - Sharp FO IS125N - B/W Laser - All-in-One Service Manual

4. IC Protectors Replacement
ICPs (IC Protectors) are installed to protect the Optical (LSU) unit,
Printer motor drive circuit, Solenoid drive circuit and Scanner motor
drive circuit. ICPs protect various ICs and electronic circuits from an
overcurrent condition.
The location of ICPs are shown below:
F300:Top side
CNPN
CNPIN
CNRTH
CNCIS
CONTROL
PWB(TOP SIDE)
CNHV
CNLSR
F300
CNPM
F500
CNMM
F600
CNTXM
CNFM
F501
CNSL
1) F300 (KAB5002 251) is installed in order to protect IC's from an
overcurrent generated in the IC302 circuit. If F300 is open, replace
it with a new one.
2) F500 (KAB2402 402) is installed in order to protect IC's from an
overcurrent generated in the Printer motor drive circuit. If F500 is
open, replace it with a new one.
3) F501 (KAB5002 321) is installed in order to protect IC's from an
overcurrent generated in the Solenoid driver circuit. If F501 is open,
replace it with a new one.
4) F600 (KAB3202 801) is installed in order to protect IC's from an
overcurrent generated in the Scanner motor drive circuit. If F5 is
open, replace it with a new one.
Replacement parts
KAB3202 801 (Sharp code: QFS-L1037YCZZ)
KAB5002 251 (Sharp code: QFS-L2021XHZZ)
KAB2402 402 (Sharp code: QFS-L2025XHZZ)
KAB5002 321 (Sharp code: QPRTR2001XHZZ)
F500/F501/F600:Bottom side
CNLAN
CNSP
CNTEL
CNLNJ
CNPW
5. Power Supply Unit Replacement
[PRIMARY]
F2
F1
1) F1 (K7135AS007): AC250V/10A is installed in order to protect
overcurrent by heater circuit breakdown.
2) F2 (K7144AR005): HTM250V/4A is installed in order to protect
overcurrent by primary circuit breakdown.
3) F101 (K7144AR005): HTM250V/4A is installed in order to protect
overcurrent by breakdown of +24V line.
4) F301 (K7144AR002): HTM250V/2A is installed in order to protect
overcurrent by breakdown of Ach line.
Caution: Don't use fuse except for rating above.

6. Volume Adjustment

You can adjust the volume of the speaker, handset, and ringer using
the up and down arrow keys.
1. Speaker volume
SPEAKER
1) Press .
2) Press or
• To turn off the speaker, press again.
2. Handset
1) When talking through the handset, press
select HIGH, MIDDLE, or LOW.
• Note: The volume reverts to MIDDLE each time you replace
the handset.
3. Ringer
1) Press or
OFF. (Make sure
not lifted, and a document is not loaded in the feeder.)
• The ringer will ring once at the selected level.
2) If you selected "OFF OK?" to turn off the ringer, press
2 – 6
FO-IS125N
[SECONDARY]
F101
F301
T1
TRANSFORMER
to select HIGH, MIDDLE, or LOW.
to select HIGH, MIDDLE, LOW or
SPEAKER
has not been pressed, the handset is
1
CN3
or to
START
.