TORONTO, ONTARIO, CANADA
Certified Electronics Technician
$40/hr - free diagnosis
contact - ECHrepairs@gmail.com

STARK 9-66 TUBE TESTER REPAIR


The Tube Tester was needed for some tube testing recently and I had to get in there and troubleshoot a few problems. There was B+, but no bias voltage or heater voltage. This machine uses two separate power supplies to generate the needed DC. A 5Y3 Rectifier tube had finally gone bad in the low voltage supply. Replacing this tube as well as the AC cord (brittle) and cleaning all sockets and switches (particularly the NORMAL/LIFE TEST switch) restored proper functionality and the machine can be used again! Basic maintenance after 60 yrs.

SPRINGTIME @ E.C.H. 2017

SHARP VZ-3500 Linear TT / Cassette Boombox (speakers not shown)

Spring is here and with it comes spring cleaning and fresh starts. Why not freshen up your sound system? I have been delighted to spruce up a variety of integrated amps and other stereo equipment for some people lately. In almost all cases the problems have turned out to be minor and fully addressable. Here are a few examples that required next to nothing in parts cost (one TT motor, a 12V bulb, some LEDs) and minimal labour. All of these units were brought back to fully working condition for less that $100, often much less.

NIKKO ND100W Cassette deck - high frequency noise on playback
 - cleaned internal record switch. Bias oscillator signal was leaking into playback.

MACKIE 1202-MZ Mini Mixer - unreliable
 - full cleaning including master send select buttons (causing intermittent drop-outs)

TECHNICS SL 1400 Direct Drive Turntable - left channel dead
 - New RCA installed

CEC HD53 Headphone Amp - erratic left channel
 - Cleaned and reseated all ICs

ROTEL RX 602 and 202 - erratic, noisy, dropouts
 - full cleaning of all pots and switches

LUXMAN L-410 - condition unknown, pulled from extended storage
 - full cleaning and testing of all INS/OUTs

LUXMAN M-02 Power Amp - distortion at all volumes, VU backlights dead
 - cracked/dry solder in driver stage and protection relays repaired.
 - LEDs to replace VU backlights.
 - full cleaning of all pots and switches.

LUXMAN C-02 Pre-Amp - erratic, noisy
 - full cleaning of all pots and switches

HARMON KARDON hk330 VI Receiver - LCD screen dead, volume knob loose
 - new 12V mini-bulb for LCD backlight, tighten volume pot

HARMON KARDON 430 - no output right channel, turner dial broken, bulbs out
 - right channel speaker protection fuse blown. Cleaned selector switch and tested for safe operation (expected output levels, low DC offset). Repaired tuner assembly. Replaced fuse-style bulbs with LED equivalents.

MARANTZ 2235 Receiver - no output, bulbs out
 - cleaned speaker protection relays, replaced fuse-style bulbs with LEDs.

TECHNICS SLBD 20D Turntable - too slow (progressively slower after exteded use)
 - Confirmed defect of DC servo motor, replaced. Strobe calibrated, confirmed working.

SHARP VZ-3500 Linear Turntable Boombox - not working at all
 - cleaned degraded belt from TT assembly, replaced belt. Replaced Linear Motor belt.
 - cleaned all pots and switches. TT, tape and radio working again.

CASIO CZ-3000 - two broken keys
 - repaired keys, full cleaning and testing.

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YAMAHA MT 4X motor replacement


I recently revitalized a YAMAHA MT4X 4 track recorder that had stopped working. The unit in question had a dead motor (exploded capacitor inside the motor, worn brushes). As these motors typically run the entire time the machine is powered up they burn through a lot of hours of use. Everything else in the machine seemed fine however, including the belt.


A new motor was sourced on the internet - a Sankyo SHU2L from a small company in Australia called PROBE - and installed. A transistor controlling motor voltage switching was replaced as well. The machine works fine again and should for many more years.

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INSTAGRAM

I have an INSTAGRAM profile now. I will try to put exciting pictures of the insides of things and outsides of things from time to time. My main activity is actually spending time fixing things so don't expect too much action in the digital realm.

instagram.com/echrepairs



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MORE RECENT JOBS - February 2017

In the last few weeks I have had the pleasure of restoring or modifying:

LAST MONTH at E.C.H. - January 2017

A brief summary of some of the pieces to pass through E.C.H. last month, with a complete lack of exciting pictures!

NEW FACEBOOK PAGE


ECH now has a facebook PAGE for social media basic representation!


NEW LOGO



E.C.H. has a new logo! Thank you to ALICIA'S KLASSIC KOOL SHOPPE for the assistance in the brainstorming and excellent implementation. This logo incorporates a SINE wave which is (approximately) what the electricity in your wall looks like and also a fundamental of sound (look up Fourier analysis sometime). 

BELL & HOWELL Filmosound 285

Bell & Howell FILMOSOUND 285, modified for guitar

ROLAND RE-201 SPACE ECHO

JUNO 106 CPU replacement

http://synthspa.com/images/basic_03.png

WURLITZER 200A repair



wiki photo I forgot to take pictures :(


ROLAND SPACE ECHO RE-150 restore

Roland Space Echo Re-150 Motor disassembled

RHODES Repair


Rhodes Mark 1 Stage-Piano knobs and tines