Sharp FO-50, Service Manual

Page: 13 / 102

FO-50RA
FO-70RA
CHAPTER 2. ADJUSTMENTS
[1] Adjustments
General
Since 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)
1 DG
2 +5V
3 MG
4 MG
5 +24V
6 +24V
7 DG
8 PSAVE
2 – 1
TEL/LIU PWB
POWER SUPPLY PWB
CNL IUA
CN2
CNPW
CONTROL PWB
CNL IUB
CNLIUB
CNLIUA
(step 1) Select "OPTION SETTING".
KEY : FUNCTION 4
DISPLAY: OPTION SETTING PRESS OR #
(step 2) Select "DIAL MODE".
KEY: Push # until " DIAL 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
Output Voltage limits
+5V 4.75V
∼
5.25V
+24V 24.0V
∼
26.0V
Connector
No. CNPW
Pin No.
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:
CNLIUA
CNPW
CONTROL PWB
(TOP SIDE)
CNMT
FU100
CNLIUB
(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.