Atari SM124 Monitor

 

Resources

Wiki
Service Manual
Schematics

Internals

Board

The schematics available for this monitor differ a little from the actual boards described below. Some of the capacitors have different symbols and some parts are interconnected in a different way.

C716 bipolar capacitor (C714 on schematics, rated 2.2uF 50V) is a single part most likely to fail. It is part of a horizontal deflection circuit and its failure results in a single vertical line on the screen. It has to be replaced with a part suitable for high impulses, for example a polyester MKP capacitor. Replacing it with a regular electrolytic capacitor of the same ratings will result in a blowup of that capacitor.

Revision 1.0

 

Revision 1.2

The difference in this revision is a different design of the right-bottom part, where in revision 1.0 there are some cables and resistors soldered. Also, instead of transistors, an integrated operational amplifier is used.

 

Revision 1.3

In this revision resistor R617 is added and a position of R614 was changed.

 

CRT Plugin Board

 

CRT

Accessory

 

Reassembly

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s