Chapter 2. Adjustments; Adjustments - Sharp FO-1850 Service Manual

FO-1850TH

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
CNTH
CNPN
CNCVR
CNSP
TEL/LIU PWB
CNLIUA CNLIUA
CNLIUB CNLIUB
Output Voltage limits
4.75V ∼ 5.25V
+5V
23.3V ∼ 24.7V
VM (+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
condition.
The location of ICPs are shown below:
CNLIUA
CNLIUB
CNRBN
CNCCD
CNMT
POWER
SUPPLY
CONTROL PWB
PWB
CNPW
Connector
No. CNPW
Pin No.
1 MG
2 MG
3 MG
4 VM
5 VM
6 DG
7 DG
8 +5V
F100
CONTROL
PWB(TOP SIDE)
(1) F100 (ICP-S07) is installed in order to protect IC's from an over-
current generated in the motor drive circuit. If F100 is open, re-
place it with a new one.
3. Settings
(1) Dial mode selector
DIAL mode (Soft Switch No. SWB4 DATA No. 3)
(step 1) Select "OPTION SETTING".
FUNCTION
KEY:
OPTION SETTING
DISPLAY:
(step 2) Select "DIAL MODE".
KEY:
# #
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:
2 – 1
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
STOP