Service jobs Archives - RJP Audio Overhaul Ltd

This Marantz HD-DAC1 was received into the RJP Audio Overhaul workshop with a non functional display.

Initially the display solder joints were checked as VFD displays are prone to dry joints due to the heat being generated by the display itself.

Following this the power supply lines were checked and although a voltage was present it was lower than suggested in the service manual.

It was then found that one of the mains input fuses was open circuit. Visually it looked ok, but placing an ohm meter across it, did indeed reveal that it was open circuit.

As soon as this was replaced the display burst back into life once more. Removing the fuse and placing an ammeter in circuit showed that the current draw on the circuit was well below the 200mA rating of the fuse.

The Marantz HD-DAC1 is undergoing soak testing to monitor for future failures.

General news

UK Audio show review 2023

Admin – October 10, 2023

This years UK Audio Show review, again based at Staverton Park Hotel has just closed its doors. A great array...

General news

UK Audio Show 2023

Admin – October 4, 2023

Its that time of the year again that the UK Audio Show is opening its doors again at Staverton Park...

Service jobs

Marantz HD-DAC1 service

Admin – October 4, 2023 – 2 Replies

This Marantz HD-DAC1 was received into the RJP Audio Overhaul workshop with a non functional display. Initially the display solder...

General news

Re-capping HiFi equipment

Admin – October 4, 2023

Here at RJP Audio Overhaul, we often get asked about re-capping hifi equipment. There are a few factors to take...

General news

Black Rhodium cables

Admin – October 4, 2023

RJP Audio Overhaul is proud to be the only authorised stockist of Black Rhodium cables here in Norfolk. We hold...

Service jobs

Parasound JC1 amplifier service

Admin – October 3, 2023

This pair of Parasound JC1 amplifiers came into the workshop for a re-cap and Bias adjustment (if needed). Luckily we...

This pair of Parasound JC1 amplifiers came into the workshop for a re-cap and Bias adjustment (if needed). Luckily we found that the bottom of the units could be removed, complete with transformer! This halved the weight of the unit on the bench, making it easier to handle, such a result!

Once the re-cap was complete along with two corroded resistors replaced on the rear panel input PCBs, we approached Parasound themselves in order to obtain the details for the bias settings. These Parasound JC1 units are fitted with two actual bias settings, to be used dependent on physical setup.

After a couple of e-mails back and forth, Parasound forwarded us not only the bias settings, but also the circuit schematic information! Very much appreciated.

Both units were ran as per Parasound’s instructions and calibrated accordingly.

If you’d like RJP Audio Overhaul to inspect your product, then please drop us a line via our contact page:

General news

UK Audio show review 2023

Admin – October 10, 2023

This years UK Audio Show review, again based at Staverton Park Hotel has just closed its doors. A great array...

General news

UK Audio Show 2023

Admin – October 4, 2023

Its that time of the year again that the UK Audio Show is opening its doors again at Staverton Park...

Service jobs

Marantz HD-DAC1 service

Admin – October 4, 2023 – 2 Replies

This Marantz HD-DAC1 was received into the RJP Audio Overhaul workshop with a non functional display. Initially the display solder...

General news

Re-capping HiFi equipment

Admin – October 4, 2023

Here at RJP Audio Overhaul, we often get asked about re-capping hifi equipment. There are a few factors to take...

General news

Black Rhodium cables

Admin – October 4, 2023

RJP Audio Overhaul is proud to be the only authorised stockist of Black Rhodium cables here in Norfolk. We hold...

Service jobs

Parasound JC1 amplifier service

Admin – October 3, 2023

This pair of Parasound JC1 amplifiers came into the workshop for a re-cap and Bias adjustment (if needed). Luckily we...