Chapter 2. Adjustments; Adjustments - Sharp FO-70 Service Manual

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
TEL/LIU PWB
CNL IUA
CNLIUA
CONTROL PWB
Output Voltage limits
4.75V ∼ 5.25V
+5V
24.0V ∼ 26.0V
+24V
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 CNLIUB
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.
POWER SUPPLY PWB
CN2
CNLIUB
CNPW
Connector
No. CNPW
Pin No.
1 DG
2 +5V
3 MG
4 MG
5 +24V
6 +24V
7 DG
8 PSAVE
CNPW
3. Settings
Dial mode selector
DIAL mode (Soft Switch No. SWB4 DATA No. 2)
(step 1) Select "OPTION SETTING".
KEY : FUNCTION
DISPLAY: OPTION SETTING
(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: STOP
2 – 1
FO-50RA
FO-70RA
4
PRESS OR #
Cursor
When initially registering,
the mode shows 1=TONE.
When registering again, the
mode which was registered
formerly is shown.
1=TONE, 2=PULSE