A site where discontinualed schematic diagrams and back dated information can be found on discontinued radios tv's and any electronic equipment can be found. Newer manuals either Service and operating manuals. Radio amateurs should find this site a great source for ham radio equipment manuals. I will return to this site should I need information on any electrical equipment. priced easy to download in a PDF format and print pages need to undertake the repair.
Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
Text excerpt from page 33 (click to view)
Page 1 of 5
Procedure to fix the Screen VR on FBT of CM771
1.Preparation (1) Solder tool with flat head.(Refer to Photo 1 and 2) 2.Operation (1) Chassis adjustment should be completed. (2) Attach the head of solder tool softly on the right side of Screen VR knob together with FBT body for approximately 5 seconds to melt them. (Refer to Photo 3 and 4) (3) Attach the head of solder tool softly on the left side of Screen VR knob together with FBT body for approximately 5 seconds to melt them. (Refer to Photo 5 and 6) (4) Attach the head of solder tool on the top of Screen VR knob for approximately 7 seconds to melt it. (Refer to Photo 7 and 8) (5) Check Screen VR can not be turned and the G2 voltage is within 600+/-10V.