Samsung SF700 Troubleshooting
Y
Y
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6. Troubleshooting
6-1. Overall Troubleshooting Flow
SF700AT 6-1
Turn on power
Load document in
feeder
Copy OK ? OGM Recording OGM play back ?
Call machine from
another phone
ICM Recoding ? Auto Answer ?
Manual
operation ?
RX OK ?
Document fed ? Push 'START' Key CIS ON ?
LCD Display ?
See 6-2 See 6-3
See 6-5See 6-4
See 6-6
See 6-8 See 6-9
See 6-7
See 6-10 See 6-11
A
System
initialized ?
Start
Troubleshooting
6-2 SF700AT
Y
Y
Y
N N
N
Hook off using
handset
Speakerphone
operating ?
Dial tone OK ? TX OK ?
Speaker
phone call
See 6-12
See 6-14
End
See 6-13
A
Y
Y
Y
Y
Y
N
N
N
N
Y
Y
Y
N
N
N
N
N
Troubleshooting
SF700AT 6-3
Logic 'H' ?
Check AC voltage
power cord
Voltage O.K
Check power
supply voltage
Replace power
supply
Fuse remain
good ?
1. Replace Fuse
2. Plug in machine
1. Unplug machine
2. Check fuse
Fuse OK ?
Measure on the
CONN board
+5 V ?
+5 V ?
Check harness OK ?
Replace OPE board
and LCD module
Replace harness
Measure on the
OPE board
OK ?
A
End
Check harness Replace harness
Start
EndConnect as required Notify customer
6-2. LCD Not Display
Y
N
Y
Y
N
N
Troubleshooting
6-4 SF700AT
Unplug P12 +5 V ?
Replace main
board
Check system reset
(U1 Pin 131) in
main board
Check Vcc
from P5-7 to P5-8
Vcc ≥ 4.5 V ?
See 6-2
Replace main board
Logic 'H' ? Replace OPE board
Start
End
Replace OPE board
and LCD module
A
6-3. System Not Initialized
Y
Y
Y
Y
N
N
N
N
Troubleshooting
SF700AT 6-5
6-4. Document Not Fed
Check
Main XFE-B
Check LCD display
when document is
loading
Check +24 V from
P5-2 to P5-4 in
main board
'DOCUMENT
LOADING'
displayed ?
Replace Doc
Sensor board
Document fed ?
Replace power
supply
Replace main board
Replace motor ass'y
OK ?
End
+24 V OK ?
Check
motor pulse (P111, 13, 15, 17) in
main board
24V
0V
Start
Y
N
N
N
N
Y
Y
Y
Troubleshooting
6-6 SF700AT
6-5. CIS LED Not Lit
Load document in
feeder
CIS LED lights OK ?
Check +5V, -12V
from P5-8, 10 to
P5-7, 9
OK ?
Replace power
supply
Replace CIS
Replace main
board
End
Check CIS from
P4-9
Low ?
Document fed ?
See 6-4
Press START key
Start
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