This machine in the process of watching character jumping up and down, sometimes beating disappear after a few characters: sometimes there will be a dancing character. sPeservice manual download site
 sPeservice manual download site
Picture and sound normal and can appear to beat the characters, the circuit work on basic normal, there are two possible failure reasons; One's character formation and display circuit for desoldering or breaking, cause poor contact; Second, a device performance becomes poor, work is not stable. sPeservice manual download site
 sPeservice manual download site
For fast judgment fault, take the test method of dynamic voltage to determine (see chart). To the CPU (39) and to end each foot ~ welding wire, connect the multimeter and 25 v block after boot, such as failure occurs when the observation voltage changes. sPeservice manual download site
 sPeservice manual download site
 sPeservice manual download site
When the fault occurs, the voltage is normal and stable, indicating that the fault is not caused by abnormal line positioning pulse. And will change CPU (39) foot welding wire welding at the foot (55), commissioning, at this time the foot voltage fluctuation. The preliminary judgment in presence of synchronous pulse echo circuit fault. Welding welding line, when the power is carefully check the CPU (55) feet to field output IC452 (7) feet between circuit and related components, first check the connectors Dll/X1 (6) feet and A2 / D2 (8), found that A2 / D2 (8) foot connectors have black oxide. The scrape and cleaning, and related DI1 / Xl (6) the feet to deal with the same stuck, commissioning, troubleshooting.sPeservice manual download site