Service manual

1、Preparation before maintenance

1.1、Master basic information.

Adequate communication with customers is required, to learn how the

trouble happens and what the status is. This will help to promote effect and

efficiency of the service.

Learn if the trouble has conflict with technical standards.

1.2、Reappearance of the trouble.

Please assure:

a. If the trouble exists as the customer described, and make initial judgment

of the status, then decide what to do next;

b. If any other trouble exists;

c. May reset the machine under some instances. For example: when

the picture and color could not satisfy the customer, could reset the machine

first and then make amendment. Method: Press the “source”button for about

five seconds, the” Factory setting” will be displayed, select the" factory reset”

and enter, then select the" All Setting( Not include calibration)” and enter.

d. Avoid the worse of trouble during the repair.

1.3、 Judgment and Repair

Judge the status of the trouble and find the reason, then repair.

Please cut off the power before disassemble and welding.

Read the manual carefully to learn security attentions.

Please obey the requirement of Disassemble drawing and description strictly ,

use specified screw, take care not to make any scars on the machine especially on the

LCD. Please wear anti-electrostatic gloves when welding. Please review the status

of power, crystal, clock, input and output data. Please read Spare part list if need any

change.

Check the packing material and accessories when change the machine for the

customer.