Toshiba TV Repair Case: 29G6UXC Model TV, Entire Unit Not Working
Fault Symptoms: For the Toshiba 29G6UXC model TV, after turning on, the red and green lights alternately flash, and the entire unit does not work.
Analysis and Inspection: Based on the fault symptoms, first measure the +B (145V) terminal voltage, which is only about 60V. After removing R470 and reconnecting a dummy load, the +B voltage returns to normal. Suspecting partial short circuit in the horizontal output transformer, even after replacement, the unit still cannot function. Checking the several loads of the horizontal output circuit all show normal operation. Considering that part of the voltage in the horizontal output circuit is related to Z801 after it operates, an inspection reveals that Z801 is faulty.
Handling Method: After replacing Z801, the fault is resolved.
Beijing Toshiba TV Repair Center, organized on August 10, 2011.