Some (but not all) include user manuals.
The best repair is to replace the rubber keypad instead of trying to restore contacts using chemicals.
In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff.They are located at 9247 Glenwood Drive, LeRoy, NY 14482.They include various manuals.Another way to roughly estimate a radio's age is to examine the 4 digit date codes often stamped on the integrated circuits.Unsolder the bare ground wire soldered to a large shield on the back of the front panel, located near the back of the squelch control.PRO-43: Loss of Audio, early PRO-43s were built with a 200 mW speaker (mfr's part #EAS-3P123A).The first digit of the long serial number is usually the last digit of the year of manufacture.If the first or 1989 suzuki gsxr 750 repair manual last 4 channels in your 8 channel PRO-7A crystal scanner are not working and the lamps for those channels won't light, replace IC4 or IC5 (type 7400A).( m/ggcomm/ or email or gRE-Built Base Models: Dim Backlight, the backlight in many base models, including the PRO-2022, PRO-2004, and PRO-2005/6 is implemented by an electroluminescent panel, which grows dim with use.The front panel assembly must be removed from the chassis by removing 4 flat head screws, 2 on each side.
After removing the volume and squelch knobs, you must remove 8 small screws which fasten the plastic front panel to the diplay board.Radio Shack no longer sells replacement EL panels for the PRO-2004.It is also available electronically from the anner ftp archive on the official usenet FAQ library ftp:anner.Top and bottom cabinet pieces must be removed, then the speaker unplugged from the main board.The author writes a monthly "Scanner Equipment" column for Monitoring audio books of swami vivekananda Times magazine, published by Grove Enterprises, but views expressed in this article are his own.Radio Shack has been selling scanners and monitor receivers under the Realistic and Radio Shack labels for over 30 years.The date of manufacture is usually printed on a gummed label on the scanner as well as the cardboard box.All of the following links access Radio Shack scanner support pages. .Copyright (C) 1997,1998, bob Parnass, AJ9S - All Rights Reserved, notice: This article may not be reproduced in whole or in part on cdroms, in bulletin boards, networks, or publications which charge for service without permission of the author.The old EL panel is fastened by a bead of glue and two foil type leads soldered to the display board.Most of them were manufactured by General Research Electronics of Tokyo, though many newer models are manufactured by Uniden.A replacement rubber keypad may be ordered inexpensively through Tandy National Parts or your local Radio Shack Store.A more capable 500 mW speaker is available through Tandy as replacement (EAS-3P127).PRO-7A: Channels 1 - 4 or 5 - 8 Dead.This will "break the trance but all the memory channels will be cleared.