Rotel RA1062 Amplifier Repair (With Audio Tutorial) скачать в хорошем качестве

Rotel RA1062 Amplifier Repair (With Audio Tutorial)

Fault Amplifier not powering on. Internal inspection confirmed protection fuses F604 & F602 T6.3 Amp had blown. Fuses replaced and output transistors on each channel checked. Right channel short circuit. As shown and explained in the video, the voltage driver boards were coated with the brown conductive and corrosive brown glue. The boards were removed and with a plastic scrapping tool the glue was removed. (Eye protection should always be used) Board checked to ensure no defective components, non found. Right channel output channel checked, the following components had to be replaced. F602 T6.3A Q630 - Q628 2SC1047C & Q634 - Q632 2SB817C34 (Sanyo Originals) Q618 2SD600K Q620 2SC3478 Q622 2SA1376 Speaker protection relays replaced 24 V DC DP/CO to avoid any issue with distorted sound or intermittent sound loss at low volume. Input selector encoder removed and taken apart; contacts cleaned with a De-greasing agent to remove the original lubricating grease. Fibre glass pencil used to clean the oxidisation off the contacts to prevent random channel changing. De-Oxit grease applied and the encoder re-assembled and fitted. User controls and switches cleaned with De-Oxit to ensure noise free operation. Bias for each channel set to 5 millivolts. Amplifier fully tested working correctly.