From the failure phenomenon to + 5 v, + 16 v and basic normal - 8 v power supply, should check the load (box), mainly dominant axis, such as drum circuit and power circuit. During the indicator light (generally can maintain 5 ~ 7 s), quickly press the "out of box" button, measure the load on both ends of the motor voltage or voltage IC6004 (3), 7 foot, normal should be about 6 v. If the voltage is abnormal, which indicates that fault in the motor drive circuit. ZqJservice manual download site
 ZqJservice manual download site
Key check IC6004 (2), end feet (should be 12 v), (1), pet-name ruby foot (should be 9 v) and (1) voltage, 6 feet. If the normal, usually IC6004 damage, if the voltage is not normal, you should check the power supply circuit. If the motor load voltage is normal, explain the damage or mechanical parts stuck a protective stop. During the period of the light, can also be quickly press "PLAY" button, if loading and leading all normal rotation axis, and drum does not turn, cause loaded in place after the outage protection, fault in drum drive circuit or the drum itself. Usually in the form of drum motor driver IC IC2006 (TA8402) is damaged, but sometimes caused by connector contact undesirable. Through one by one measurement, find out the source of trouble. If loading and drum rotation is normal, but the tape is not running, suggests that fault occurred in the main shaft drive circuit, the main motor itself or mechanical transmission parts. With main shaft driving integrated circuit IC2005 (AN8341RT) damage is common. In addition, if the variable speed belt, etc. The mechanical transmission part fails, can also cause the tape stop running, is responsible for monitoring the tape running photoelectric monitor at this time will be within 5 ~ 7 s stop command output signal to a microprocessor.ZqJservice manual download site