No Operation - Acroprint ES700 Service Manual

5-1. No Operation

No operation
Check the AC Adapter Ass'y output voltage level.
(See "Voltage Check.")
Normal?
Turn the power off and detach
the outer jacket.
Is fuse F1 blown?
Determine the cause of the blown fuse.
• Foreign matter (metal, etc.)
• Caught or exposed wires
• Short circuit caused by inadequate soldering
Change the fuse.
For safty reasons,
replace only with the same type and rating of Fuse.
• Regulator IC P3 failure
• Short circuit
• Over load
• Regulator IC P4 failure
• Short circuit
• Over load
No
Yes
Yes
No
No
• Digits are not displayed on the LCD.
• Unable to print.
AC Adapter Ass'y failure.
Check the 5V and 10V voltage levels.
No
No
Is the 10V level
being output?
Yes
Is the 5V level
being output?
5-2
(See "Voltage Check.")
Normal?
Yes
Yes
Control circuit failure.