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1. Features
Chapter 1 - Introduction
In the fall of 1996, Sony Electronics introduced a troubleshooting course (TVP-06) that covered troubleshooting
of the AP and RA-1 chassis, along with the prior EX and EXR model sets. The course provided some useful and
practical approaches to repairing failures that might occur in each of the circuits, and allowed the technician to
focus on troubleshooting more than theory of operation. Unfortunately, the RA-2 chassis was not included as
this product was just being released on the market. This chassis will not be covered in this course and since it
shares much of the same circuitry as the RA-3, you should be able to apply virtually all of the troubleshooting
techniques covered in this course. For information regarding theory of operation for this chassis, refer to the
training manual TVP-07 (P/N TVP070797).
Almost six years have passed, and six new chassis versions have been introduced. Some minor (and some
dramatic) changes in circuitry design have occurred. High Definition Television was finally getting underway and
the competition for producing better performing projection televisions introduced new features that had never
been seen before. In some cases, new troubleshooting approaches are needed to effectively deal with these
new circuit designs. Add replacement parts tracking and you have useful resources to document some practical
approaches to solving problems that might arise.
The course will be organized by chassis group with a brief description of what was introduced in that family.
Next, the major circuits with a brief description of each will be covered with some reasonable approaches to
isolating problems. If you need more detail on the theory of each circuit, the appropriate training manual that
applies will be mentioned.
NOTE
: Much of the power supply troubleshooting techniques in this manual involve using a variac with either a
separate or integrated AC amp meter. If you do not have one, get one. You cannot perform speedy power supply
troubleshooting without one and risk the possibility of damaging newly installed components or causing the
failure of other parts along the way.
