Troubleshooting - Sharp FO-4700 Service Manual

FO-4700TH
FO-47A4

[3] Troubleshooting

1. Fax troubleshooting
Refer to the following actions to troubleshoot any of the problems men-
tioned in 1-4.
[1] A communication error occurs.
[2] Image distortion produced.
[3] Unable to do overseas communication.
[4] Communication speed slow due to FALLBACK.
•
Increase the transmission level SOFT SWITCH 8-4, 5, 6, 7, 8
May be used in case [1] [2] [3].
•
Decrease the transmission level SOFT SWITCH 8-4, 5, 6, 7, 8
May be used in case [3].
TO:
CC:
FM:
From: Mr.
Our customer Name
Address
Contact person
Other party Name
Address
Contact person
Problem mode Line: Domestic / international
Reception / Transmission
Frequency:
Confirmation
Our customer
item
A1
Our service
Comment
Countermeasure
**** Please attach the G3 data and activity report on problem. ****
ATT:
ATT:
***** Facsimile communication problem *****
Fax Tel No.:
Automatic reception / Manual reception
Automatic dialing / Manual dialing / Others
B1
B2
C1
A2
C2
E1
E2
•
Apply line equalization SOFT SWITCH 8-1, 2
May be used in all cases.
•
Slow down the transmission speed SOFT SWITCH 6-5, 6, 7, 8
May be used in case [2] [3].
•
Replace the LIU PWB.
May be used in all cases.
•
Replace the control PWB.
May be used in all cases.
* If transmission problems still exist on the machine, use the following
format and check the related matters.
Mode: G3
% ROM version:
Other party
D2
D1
Other party's service
2 – 34
Ref.No. :
Date :
Dept :
Sign :
Ref.No.:
Date:
Tel No.
Fax No.
Model name
Tel No.
Fax No.
Model name
Phase: A. B. C. D.
Please mark problem with an X
No problem is: 0
A1 A2 B1 B2 C1 C2 D1 D2 E1 E2
Transmission level setting is (
customer
Transmission level ( ) dBm
Reception level ( ) dBm
By level meter at B1 and B2
) dB at our