Troubleshooting - Sharp AM-900 Service Manual

AM-900U

[3] Troubleshooting

Refer to the following actions to troubleshoot any of the problems
mentioned 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.
• In crease the transmission level SOFT SWITCH 12-1, 2, 3, 4, 5.
May be used in case [1] [2] [3].
• Decrease the transmission level SOFT SWITCH 12-1, 2, 3, 4, 5.
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
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
A1 A2
C2
E1
E2
• Apply line equalization SOFT SWITCH 10-7, 8.
May be used in case [1] [2] [3] [4].
• Slow down the transmission speed SOFT SWITCH 10-1, 2, 3, 4.
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 follow-
ing format and check the related matters.
Model: G3 Phase: A, B, C, D.
% ROM version:
Please mark problem with an X.
Other party
No problem is: 0.
A1 A2 B1 B2 C1 C2 D1 D2 E1 E2
D2
Transmission level setting is (
customer
D1
Transmission level (
Reception level (
Other party's service
By level meter at B1 and B2
2 – 30
Ref.No. :
Date :
Dept :
Sign :
Ref.No.:
Date:
Tel No.
Fax No.
Model name
Tel No.
Fax No.
Model name
) dB at our
) dBm
) dBm