Service manual

FO-4400U
FO-CS1
Output Voltage limits Note
+5V MAIN 4.947V~5.25V CN5 7pin ↔ 8pin
+24V SUB 23.04V~24.96V CN5 1pin ↔ 2pin
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
Fig. 1
POWER
SUPPLY
PWB
CONTROL PWB
PRINTER PWB
HIGH VOLTAGE
PWB
CN5
CN1
CNPW1
CNPRT1
1
112
130
CN1
130
12
CN1
VR51
[DO NOT TOUCH!]
1
10
CN7
CN4
1
8
1
10
1
8
2
DISPLAY:
KEY:
22: DIAL MODE
1=TONE, 2=PULSE
(step 2) Select "DIAL MODE".
2
2
(step 1) Select "OPTIONAL SETTING".
DISPLAY:
DISPLAY:
DISPLAY: TONE SELECTED
KEY:
MENU 4
KEY:
4:OPTIONAL SETTING
ENTER #(01-36, , )
KEY:
22: DIAL MODE
KEY:
KEY:
DISPLAY:
(step 4) End, using the "STOP" key.
(step 3) Select, using "1" or "2".
(step 2) Select "DIAL MODE".
1
2
PULSE SELECTED
2
STOP
2. IC protectors replacement
ICPs (IC Protectors) are installed to protect the CIS unit, panel PWB
unit, TX motor drive circuit and verification stamp drive circuit. ICPs pro-
tect various ICs and electronic circuits from an overcurrent condition.
The location of ICPs are shown below:
(1) F1 (ICP-S0.5) F2 (ICP-S1.0) is installed in order to protect IC’s from
an overcurrent generated in the CIS unit. If F1 or F2 are open,
replace it with a new one.
(2) F5 (ICP-S1.0) is installed in order to protect IC’s from an overcurrent
generated in the panel PWB unit. If F5 is open, replace it with a
new one.
(3) F100 (ICP-S1.0) is installed in order to protect IC’s from an
overcurrent generated in the verification stamp drive circuit. If F100
is open, replace it with a new one.
(4) F101 (ICP-S1.8) is installed in order to protect IC’s from an
overcurrent generated in the TX motor drive circuit. If F101 is open,
replace it with a new one.
In addition to the replacement of F1, F2, F5, F100 and F101, the
factor causing F1, F2, F5, F100 and F101 to open must also be
repaired. If not, F1, F2, F5, F100 and F101 will open again.
Replacement parts
ICP-S0.5 (Sharp code: VHViCPS05//-1)
ICP-S1.0 (Sharp code: VHViCPS10//-1)
ICP-S1.8 (Sharp code: VHViCPS18//-1)
Fig. 2
CONTROL PWB
(TOP SIDE)
CNLIU1
CNSP1
CNSEN1
CNCIS1
CNPN1
CNSTP1
F1/F2/F5:Top side
F100/F101:Bottom side
CNTXM1
IC3
1
1
8
10 1
1
1214
27
228
F1
F2
F5 F100
F101
2
CNPW1
12 1
2 – 1
Connector CN4
No.
Pin No. CN1
1 11 +5V
2 10 CH LREM
39T VR
4 8 T MON V
5 7 T MON I
6 6 B VR
7 5 V REM
8 4 C MON
93MG
10 2 +24V
Connector CN1
No.
Pin No. CN7
1 +24V MAIN
2MG
3DG
4DG
5 +5V MAIN
6 +5V MAIN
7 HEATER ON
8 H-RELAY OFF
Connector CN5
No.
Pin No. CNPW1
1 +24V SUB
2MG
3MG
4MG
5 +24V MAIN
6 +24V MAIN
7 +5V MAIN
8DG
9DG
10 DG
11 +5V MAIN
12 +5V MAIN
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".