1. Direction of the display there is a common problem, is to use about Oil capacitor a year or so, they will suddenly "creak" Zhijiao, images kept flashing.

Fault location: C706 missing burst (400 V220UF)

This issue is the high voltage power supply filter capacitor circuit capacity loss caused. If the test at this time of high pressure filter capacitor (the largest display of that, near the power plugs) ends of the voltage, the normal should be about 310 V, but now only about 192 V. Capacitance capacity lost because after filtering loss, the effective DC voltage components declined, switching power supply in order to ensure normal output voltage automatically raise oscillation frequency. Finally, until the switching power supply in the free oscillation state, working at their full capacity. Because of the work of this high frequency, the switching transformer T beyond the normal scope of work, the issue of ear-piercing "creak" hoot.

Solution: 450 V220U replacement of electrolytic capacitors on it.

Such fault in particular, about 20 percent. Some of the direction of the company OEM products have a similar fault, this is probably the time when the election expected in the quality of the selected capacitor problem. After the emergence of such failure, if not an immediate repair, because the power supply is likely to adjust the Q702 free oscillations in the state, working at their full capacity and excessive burning fever, will be burned at the Oil capacitor same time, such as IC701.

Similar problems in the direction of BT1591 display there.

2. Direction after the boot screen display Manping not only adjusted to 1 cm from both sides of the location, will not be able to adjust. If the factory pattern to adjust the width of the level of deputy SB (SUB SIZE) option, the above-mentioned position, the image will be extended to 1.40, but could not extend the central image.

Fault location: D607 (IN4148)

Breakdown this road for the T602 No. 6 feet by the J630, J651, R108 (Yellow Zijin Gold), D607, D616 to IC601 section 3 feet.

3. Direction display images too large, and can not be adjusted

Fault location: Q613 (TIP122) Breakdown

4. Direction display images too small, only the middle 1 / 2 size, and theOil capacitor bow was distortion, effective regulation OSD menu, but adjusted for normal conditions.

Fault location: Q613 Xuhan

5. Upper screen a horizontal line, ineffective regulation

Fault location: C513 leakage

6. Power after the machine "Data" sound, and display a power of the light flashes.

Fault location: Q615 line breakdown of a short circuit, the second from Zhengliuguan D713, D714 breakdown, or secondary power supply circuit to abnormal.