The output of the power supply board is 0V. to the external +5V power supply.. Screen display and boot screen normal. The board circuit is basically normal.
Check the power supply board, found to have damaged elements: power module dip2 VIPer22A burst with a, the CCL (104) breakdown, + 5V rectifier diode (1N5822) breakdown.
After replacing the damaged element. Power supply still no output. The main filter capacitor C3 (47 F/400V) is maintained at both ends of the power down case. Power supply not working. Further examination. The primary winding of the switch transformer is discovered, and the inspection is broken in the winding, and the transformer is replaced without the same type of transformer..
Rowling decided to use F12 DVD power board of the whole machine substitution power board.
The power supply board outputs two sets of 12V, a group of +5V and a set of one 12V voltage.
Luo Lin F12 board just a few of the group of voltage output. The terminals of the power supply board outlet are as follows: +5V, G, +5V, G, 12V, +12V, G, and F12 board are as follows: G, +5V, G, +5V, G, +12V, -12V. Are seven terminals socket, the board are labeled corresponding functions and parameters. The substitution operation is very simple. The pin is connected to the power cable plug in board. In the new plate output socket of the order were adjusted accordingly, and connect the good city electric power input and power switch connector, the original power supply board installation position fixed new plate. Power test machine, the machine runs normal.
In the area of damage or to find parts of the case, power supply for the finished plate overall substitution of original machine power supply board. Both time and economy. The user is also easy to accept, after a shortcut.