Chapter 2. Adjustments; Adjustments - Sharp FACSIMILE FO-4500 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
CNPW
CONTROL
PWB
Output Voltage limits
+5V 4.75V~5.25V
+12V 11.5V~12.5V
VM (+24V) 23.04V~24.96V
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the TX motor drive circuit
and verification stamp drive circuit. ICPs protect various ICs and elec-
tronic circuits from an overcurrent condition.
The location of ICPs are shown below:
CONTROL
PWB
IC17
(TOP SIDE)
IC13
POWER SUPPLY
PWB
CNPW
Fig. 1
Connector
No. CNPW
Pin No.
1 VM
2 VM
3 VM
4 MG
5 MG
6 MG
7 +5V
8 +5V
9 DG
10 DG
11 +12V
12 AG
CNPW
CNPRT
CNRS
F1
CNPN
F2 F3
Fig. 2
(1) F3 (CCP2E20) is installed in order to protect IC's from and
overcurrent generated in the verification stamp drive circuit. If F3
is open, replace it with a new one.
(2) F1, F2 (CCP2E30) is installed in order to protect IC's from an
overcurrent generated in the TX motor drive circuit. If F1, F2 is
open, replace it with a new one.
In addition to the replacement of F1, F2 and F3, the factor
causing F1, F2 and F3 to open must also be repaired. If not, F1,
F2 and F3 will open again.
Replacement parts
CCP2E20 (Sharp code: VHVCCP2E20/-1)
CCP2E30 (Sharp code: VHVCCP2E30/-1)
3. Settings
(1) Dial mode selector
OPTION SETTING: DIAL MODE (Soft Switch No. SW2 DATA No. 1)
Use this to set the fax machine to the type of telephone line you are
on.
•
The factory setting is "TONE".
(step 1) Select "OPTION SETTING".
FUNCTION
KEY:
OPTION SETTING
DISPLAY:
(step 2) Select "DIAL MODE".
KEY:
2 3
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-4500H
4
ENTER #01 33, ,#
Cursor
When initially registering,
the mode shows 1=TONE.
When registering again, the
mode which was registered
formerly is shown.
1=TONE, 2=PULSE