Instant boot can rise to test the primary voltage 80 v, consult the protection circuit itself, found Q902 trigger highly anti-jamming capacity C913 (10 u F / 16 v) a rust pins have been broken, change new left in voltage can be up to 110 v, but still protected, can hear the rustling of short-time speakers make at this time. This shows produced by line output transformer secondary power supply has been formed. Protecting the reason should be a secondary power supply under the heavy load. By road operation become the secondary power supply, when off line to become {5} feet branch, power no longer protection, but still no grating. Chad {5} feet in addition to offering protection circuit voltage sampling, also for filament line pulse power supply and CPU characters and AV input power supply, etc. (relevant circuit such as attached). Disconnect the AV input power supply branch circuit, the grating, viewing is normal. Uxuservice manual download site
 Uxuservice manual download site
 Uxuservice manual download site
The turn-to-turn short circuit, check the pulse transformer T1301 primary has further Chad C1331 (1000 mu F / 16 v) capacitance feet in low resistance state. Including T1301 difficult to repair, because this machine for hot plate machine, AV input circuit should be isolated power supply, part with AV power method is used for emergency repair, with insulated wire line on the magnetic core around the two laps around, disconnect T1301 subprime, will wire connected to the original rectifier filter circuit.Uxuservice manual download site