I found the manual to be clear concise and complete. It was of immense assistance when removing the unit as the unit was over 22 years old and the wiring diagram was unobtainable from the manufacturer. The exploded drawings were clear as were the instructions and labels.
I liked the product. I would use their sevices again.
Text excerpt from page 12 (click to view)
HDD/DVD Recorder Combi
12
5). Karaoke Demo Test:
5.3
Items of the DVD disc in common use when rma 5.3.1 Necessary Repairing tools in need to test the following 3 items: A. Video output B. Audio output C. AV output (film)
5.3.2 Note of step: STEP1: A. Insert the DVD VIDEO 5-1 / 5-2P disc and it will auto playback B.Press the key of �Top Menu� on remote to login the menu
C.Select the item 1�Video Signal Test and press �Enter� to start the test on any color difference in Color bar and the standard fineness of the RGB, then press