Sharp FO-55, Service Manual

Page: 13 / 80

UX-44U
FO-55C
CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
The following adjustments and settings are provided for this model.
Make adjustments and/or setup as necessary.
1. Adjustments
Adjustments of output voltage (FACTORY ONLY)
1. Install the power supply unit in the machine.
2. Set the recording paper and document.
3. When the document is loaded, power is supplied to the output lines.
Confirm that outputs are within the limits below.
Output voltage settings
3. Settings
Dial mode selector
DIAL mode (Soft Switch No. SWB4 DATA No. 2)
Output Voltage limits
+5V 4.75V
∼
5.25V
+24V 24.0V
∼
26.0V
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the motor driver circuit.
ICPs protect various ICs and electronic circuits from an overcurrent con-
dition.
The location of ICPs are shown below:
1 DG
2 +5V
3 MG
4 MG
5 +24V
6 +24V
Connector
No. CNPW
Pin No.
2 – 1
TEL/LIU PWB
POWER SUPPLY PWB
CNLIUA
CNLIUA
CN2
CNPW
CONTROL PWB
CNLIUA
CNPW
CONTROL PWB
(TOP SIDE)
CNMT
FU100
(1) FU100 (KAB2402) is installed in order to protect IC’s from an over-
current generated in the motor drive circuit. If FU100 is open, re-
place it with a new one.
(step 1) Select "OPTION SETTING".
KEY : FUNCTION 4
DISPLAY: OPTION SETTING PRESS OR #
(step 2) Select "DIAL MODE".
KEY: Push # until " DAIL MODE " is
indicated because the number of
# s changes by the model.
DISPLAY: DIAL MODE
(step 3) Select, using "1" or "2".
KEY: 1
DISPLAY: TONE SELECTED
KEY: 2
DISPLAY: PULSE SELECTED
(step 4) End, using the "STOP" key.
KEY:
Cursor
When initially registering,
the mode shows 1=TONE.
When registering again, the
mode which was registered
formerly is shown.
STOP
1=TONE, 2=PULSE
4. Volume setting
You can adjust the volume of the speaker, ringer, and handset using the
VOLUME key.
(1) Speaker
1
Press the SPEAKER key.
2
Press the VOLUME key one or more times to select the desired level.
The display will show:
SPEAKER VOLUME
3
Press the SPEAKER key once again to turn off the speaker.
(2) Handset
1
Lift the handset.
2
Press the VOLUME key to select the desired level.
The display will show:
RECEIVER VOLUME
3
Replace the handset.
•
Note: The handset volume reverts to medium each time you hang
up.
(3) Ringer
1
Press the VOLUME key to select the desired volume. (Make sure the
SPEAKER key has not been pressed and the handset is not lifted.)
The display will show:
RINGER VOLUME
2
If you want to turn off the ringer, continue to press the VOLUME key
until RINGER OFF: OK? appears in the display, and then press the
START key.