AR-C170 (serv.man28). Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 19

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AR-C170M  TROUBLESHOOTING  11 - 19
Main 
code
Sub 
code
Title
FAX MODEM operation 
abnormality
F6
04
Display
Lamp/Message
Phenomenon Detail
FAX PWB MODEM chip 
operation trouble
Section
FAX
Case 1
Cause
Normal operation is made 
with the FAX PWB SW101 
on the BOOT side. FAX 
PWB MODEM chip 
operation trouble
Check & 
Remedy
Set the FAX PWB SW101 
to the other side than the 
BOOT side, and supply 
power again. Replace the 
FAX PWB.
Main 
code
Sub 
code
Title
FAX write protect release
F6
20
Display
Lamp/Message
Phenomenon Detail
The write protect JP of the 
ICU PWB is released.
Section
FAX
Case 1
Cause
The FAX write protect pin is 
set to Write Enable.
Check & 
Remedy
Check the write protect pin 
of the ICU PWB.
Case 2
Cause
ICU PWB trouble
Check & 
Remedy
Replace the ICU PWB.
Case 3
Cause
FAX PWB trouble
Check & 
Remedy
Replace the FAX PWB.
Main 
code
Sub 
code
Title
Improper combination of the TEL/
LIU PWB and the FAX soft switch.
F6
21
Display
Lamp/Message
Phenomenon Detail
Improper combination of the 
TEL/LIU PWB and the FAX 
PWB information (soft 
switch)
Section
FAX
Case 1
Cause
The destination of the 
installed TEL/LIU PWB 
differs.
Check & 
Remedy
Check the destination of the 
TEL/LIU PWB.
Case 2
Cause
The FAX PWB information 
(soft switch) differs.
Check & 
Remedy
Check the FAX PWB 
information (soft switch).
Case 3
Cause
TEL/LIU PWB abnormality
Check & 
Remedy
Replace the TEL/LIU PWB.
Main 
code
Sub 
code
Title
The FAX-BOX PWB is not one for 
the AR-C170M. (FAX detection)
F6
97
Display
Lamp/Message
Phenomenon Detail
The Modem controller of the 
FAX-BOX is not one for the 
AR-C170M.
Section
FAX
Case 1
Cause
The FAX-BOX Modem 
controller PWB information 
(hard detection) is not for 
the AR-C170M. (A Modem 
controller PWB for the AR-
FDX5/FX6 or the AR-FX8 is 
used.)
Check & 
Remedy
1. Check the FAX-BOX 
MODEM controller.
2. Replace the MODEM 
controller PWB with one 
for the AR-C170M.
Main 
code
Sub 
code
Title
Improper combination of the FAX-
BOX destination data and the main 
unit destination data
F6
98
Display
Lamp/Message
Phenomenon Detail
Improper combination of the 
FAX-BOX destination data 
and the main unit 
destination data
Section
FAX
Case  1
Cause
Improper combination of the 
destination written in the 
EEPROM on the FAX-BOX 
PWB and the main unit 
destination data (set with 
SIM 26-6).
Check & 
Remedy
1. Check the destination of 
the FAX-BOX.
2. Check the destination of 
the main unit with SIM 
26-6.
3. Use a proper 
combination of the main 
unit and the FAX-BOX.
Main 
code
Sub 
code
Title
FAX board EEPROM read/write 
error
F7
01
Display
Lamp/Message
Phenomenon Detail
FAX board EEPROM read/
write error
Section
FAX
Common
Check 
Check with SIM 66-3 
(memory check).
Case 1
Cause
EEPROM trouble, FAX 
PWB EEPROM access 
circuit trouble
Check & 
Remedy
When NG in SIM 66-3 
EEPROM.
1. Replace the EEPROM.
2. Use SIM 66-1 to enter an 
adjustment value of the 
soft switch.
3. After entering an 
adjustment value, use 
SIM 66-4/5 (signal send 
level) and SIM 66-14/15/
16 (dial test) to make 
adjustments.
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