Using digital meter to detect the main power supply 14V normal, voltage regulator, 8V are 4.82V, 7.95V, 5V, 5V,, the low voltage, disconnect the load, the rise is 4.91V. Trial 7805 genuine replacement, voltage up to 4.97V, the test machine, four minutes after the failure to reproduce. At this point with the hand to touch the driver integrated block BA6392, the integrated block 7805 and 7808, power transformer temperature are high. There is no special heat sink in the machine, and the transformer capacity is insufficient, so the temperature of the machine is too high. With a fan in the machine blowing to help heat dissipation, reproducing a DVCD dish, from start to finish with no failure occurs, apparently the root causes of the failure is because the machine is overheating. With the computer power supply cooling fan, each part of the internal heat and observation, when the hair dryer, everything is normal. View the bald model HPC-3LX, optical structure and Philips' new head are similar, the weight is light, but the observation the process relatively rough, because without the replacement of the same type of head and shaved head is used in a short time, decided to improve machine environment, try to repair the machine.

The first step to 7805, 7808 plus a piece of not less than 15W of the heat sink; to BA6392 plus a piece of chip.

The second step in the optical head is below the shell, with a gimlet hit three rows for a total of nine diameter 4mm aperture, find a only computer dedicated CPU cooling fan, the size of 5cmx5cmX1.2cm, use the glue nianlou 502 at the top of the hole, pay attention to the wind from outside to inside blows to the head. Because the volume is small, does not affect the disc rotation, just let the head of good heat radiation. The above transformation, all normal.