Affordable, Quality Audio Repairs & Restorations

Phone: 519-513-1084

Email: repairs@dnaelectronics.ca

Address: 15 Shaftsbury Dr. Kitchener, ON, Canada

Quality, Reliable Restorations by Experienced Father & Son Technicians. We Take Pride in our Workmanship.

Receivers | Power Amplifiers | Integrated Amplifiers | Preamplifiers | Tuners

D 'n A Topics & Resources

Restoration Information

General information about our restoration work, and pricing information for various models.

Audio Specifications Database

We are compiling a database of audio equipment specifications gleaned from our annual equipment directory magazines, owner's manuals, service manuals, etc.

Audio Picture Gallery

Pictures of some of the equipment we've worked on, with occasional commentary.

Our Testing Procedures

We test the audio components we restore to ensure they perform at least as well as expected. This is both an overview of our measuring procedures, and an attempt to make clear exactly what is being measured.

FAQ

Answers to some frequently asked questions.

Marantz 4230 Gallery

Pictures of the Marantz 4230 4-channel receiver. You can check out the specs here.

If you have a Marantz 4230 receiver in need of repair, call us at 519-513-1084 or email us: repairs@dnaelectronics.ca.

Above and below: A dusty Marantz 4230.

The dolby circuit board after all the electrolytic capacitors have been changed.

One of the audio output circuit boards, before it was rebuilt. There are two output boards; each board contains two channels. The Marantz 4230 uses a capacitor-coupled output arrangement. The tall, grey capacitors on either side of the board are the output capacitors (3300 uF 35V).

The vellum paper behind the tuner dial-plate was replaced, restoring the original rich blue colour. I tend to prefer Marantz receivers without the wooden case, but I have to admit, this one looks pretty good in the case!

Sponsored Link

Founded in the 1950's by Saul Marantz, Marantz products arguably peaked in the 1970's, particularly with their line of 2200 series receivers. Today, the 2200 series receivers are immensely popular with audiophiles and audio collectors. Along with their power amplifiers, preamplifiers and tuners, Marantz is practically the definition of 1970's home entertainment. They won't tell you this on their website, but, unfortunately, by the time the early 1980's came along, most Marantz products were a mere shadow of their predecessors.

The 2 or 4 channel mode-selector switch is on the back of the receiver. The switch setting should not be changed while the receiver is turned on!

D 'n A Electronics is a Father & Son business located in Kitchener, Ontario, Canada. We specialize in restoring hi-fidelity audio power amplifiers, integrated amplifiers, preamplifiers, receivers, and tuners. We've been repairing vintage audio equipment since long before it was considered vintage! It is our goal, and pleasure, to reliably restore hi-fi audio equipment to original operating condition (or better!). We accept shipments from across Canada, and many customers from Kitchener, Waterloo, Cambridge, Guelph, Hamilton, London, Toronto and surrounding areas find us to be within convenient driving distance. Thank-you for visiting our website, we look forward to serving you!