my ps2 is not working because it says reading disk over and over whats the best place to get it repaired?
Posts under ‘Repairing Tutorial’
Radio Restoration V. 2: Electronic Repair
My how-to dvds on sale for up to 60% off! Get any single volume in the series for just $29.99; any two for $49.99, any three volumes for $59.99, or get all four for just $69.99, all including free US shipping! Will ship worldwide for additional charge. In Vol. 2, we’ll build upon Volume 1 by utilizing over a dozen different tube radios and explaining the different kinds of circuits you’ll encounter and how best to troubleshoot and repair them. Go to www.bretsoldradios.com for more info info. Email bretsoldradios@att.net with questions or paypal payment.
Does anyone know of a good electronic repair shop for old electronics?
I have an old mid-70s Marantz stereo Receiver, model: 2252B. and the Left speaker channel has stopped working and some of the knobs have become increasingly difficult to turn. Does anyone know of a good repair shop in either Central California or the San Francisco Bay Area? I have the schematics for it so that shouldn’t be a problem i just need a place that can diagnose and repair it for me at a decent price.
AC Adapter Reparation Notes
AC adapter basics:
It seems that the world now revolves around AC Adapters or ‘Wall Warts’ as they tend to be called. There are several basic types. Despite the fact that the plugs to the equipment may be identical THESE CAN GENERALLY NOT BE INTERCHANGED. The type (AC or DC), voltage, current capacity, and polarity are all critical to proper operation of the equipment. Use of an improper adapter or even just reverse polarity can permanently damage or destroy the device. Most equipment is protected against stupidity to a greater or lessor degree but don’t count on it. The most common problems are due to failure of the output cable due to flexing at either the adapter or output plug end. See section below on repair procedure.
1. AC Transformer. All wall warts are often called transformers. However, only if the output is stated to be ‘AC’ is the device simply a transformer. These typically put out anywhere from 3 to 20 VAC or more at 50 mA to 3 A or more. The most common range from 6-15 VAC at less than an Amp.
Loudspeaker Repair Notes
Loudspeaker anatomy:
In this document, we use the terms ‘loudspeaker’ or ’speaker system’ to denote a unit consisting of one or more drivers in an acoustic enclosure perhaps along with a frequency selective crossover, tone controls and switches, fuses or circuit breakers. Connections to the amplifier or receiver are via terminals on the rear.
The front is covered with an (optically) opaque or semitransparent grille which provides protection and improves the appearance (depending on your point of view).
A ‘driver’ is the actual unit that converts electrical energy into sound energy. Most drivers use voice coil technology: a very low mass coil wound on a light rigid tube is suspended within a powerful magnetic field and attached to a paper, plastic, or composite cone. The audio signal causes the coil to move back and forth and this motion causes the cone to move which causes the air to move which we perceive as sound.
