This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
Text excerpt from page 51 (click to view)
LC-37HV6U
Noise is caused to the moving picture when the QS drive is set to ON.
Is OSTEMP.AD on the 3rd page of the process adjustment mode set to 255? YES Is the harness connected correctly between the Thermistor PWB and Inverter-4 PWB? YES Is the board-to-board connected correctly between the Inverter-3 PWB and Inverter-4 PWB? YES Is the harness connected correctly between the Monitor PWB and Inverter-3 PWB? YES Is the input voltage on pin (2) of IC2004 (microprocessor) 5V? YES TH6301 thermistor is faulty.
No
Check IC4701 and IC4901 and the peripheral circuitry.