Watch the machine to receive normal that record part have no problem. Send a signal when the other party not receive, may be by signal read or transmitting channel part has a problem. KEUservice manual download site
 KEUservice manual download site
The machine by signal reading part is mainly composed of self-focusing lens array, LED lighting sensor array, or information and system control circuit IC1, etc, as shown. LED lighting array is used to replace tubes, as closed information sensor light source. Closed information sensor by IC1 ⑾ FIG, [14] foot outputs the signs, F1 driver, LED array of manuscript for photoelectric conversion, output analog image signal (AIN), to the IC1 (206) by the A/D converter converts binary image digital signal. That part of the working principle is as follows: KEUservice manual download site
 KEUservice manual download site
 KEUservice manual download site
When inserted into the manuscript according to the "start" button, the system control circuit IC1 (30) feet, output level Q709, Q710 conduction, light-emitting LED array with voltage. At the same time, the IC1, output level (29) feet Q706, Q705 conduction, + 5 v voltage sensors via Q705 add to or information. The Q706 conduction and cause Q707, Q708 conduction, + 12 v voltage sensors via Q708 add to or information. KEUservice manual download site
 KEUservice manual download site
Maintenance, using a multimeter CN3 socket on the mainboard + 5 v, 12 v and + 24 v working voltage, found that when the manuscripts to be scanned, LED array attending feet no + 24 v voltage, therefore the LED array without lighting power supply. Again in the process of scanning, measuring the IC1 there are about 4.2 V (30) feet high level, in turn, Q709 Q710 and related components, found Q710 sb1322 (2) has been damaged. KEUservice manual download site
 KEUservice manual download site
Methods: replacement 2 sb1322 after commissioning, troubleshooting.KEUservice manual download site