Transmission Test - Ricoh FAX680MP Service Manual

31 March, 1997

7.3 TRANSMISSION TEST

Transmission Test
Press 'On Hook' key
Dial Tone?
Yes
Set document into feeder
Yes
'DIAL KEYPAD'
No
QUICK: KEYPAD
Yes
Press 'Quick' key
Call another fax
Press 'Start' key
Transmitted
normally
Yes
Test end
Change Tx motor
No
Volume adjusted to min
NCU relay switches
Check pin 16 of CN7 (RY 10N)
No
when 'On-Hook' button pressed
Copy test
Signal change
high to low
Check FCU-NCU harness
Check NCU
Change defective parts
Test again
No
Yes
Tx motor rotates
No
Check motor drive
pulses
Yes
OK?
No
Change FCU
Test again
H905T003.vsd
7-3
TRANSMISSION TEST
Yes
Adjust volume
No
Test again
Yes
Check telephone line
Check NCU
No
Yes
OK?
Change defective parts
No
Yes
Change FCU
Test again
Yes
Handshake tone
Change FCU
No
Check telephone line
Check FCU-NCU harness
Check NCU
Yes
OK?
Change defective parts
No
Change FCU
Test again
No
Test again