Panasonic TC-29V1R type color TV the boot "three noes", the power indicator light does not shine. The machine without any fault repair method |
| Time£º2014-07-10 08:41:00 Source£ºNetwork Author£ºUnknown Clicks£º1332 |
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24iservice manual download site
24iservice manual download site
In hindsight that D885 circuit diode should be standby switch power supply voltage regulation; When the output voltage increases, will increase, and the current through the D885 in Q882 base to form a voltage changes over the output voltage to control the conduction of 0882 degree, thus Q881 control with cut-off time so as to realize the purpose of the voltage regulation, to ensure the stability of the output voltage of 16.8 V and 16.8 V. When D885 breakdown, D882 rectifier output voltage to the Q882 base, saturate Q882 conduction, leading to the conduction of Q881 the base and thus destroyed the oscillation condition of auxiliary power, auxiliary power oscillation stop, no standby voltage output, the machine doesn't work, is essentially played a protective role.24iservice manual download site
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