Sony KP 48S70, Training Manual

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RA-4 vs. RA-4A
Overview
This section discusses the similarities and differences between the RA-4
and the new RA-4A chassis. The new chassis is nearly identical in fea-
tures and circuitry to the RA-4 and the key differences will be discussed in
this manual. Please obtain a copy of TVP-08 for detailed circuit descrip-
tions of the circuits not covered in this book. The part number for the
TVP-08 training manual is TVP080299. An electronic version can be found
at http://service.sony.sel.com.
RA-4A Features
The KP-53XBR300 and KP-61XBR300 are the models that use the RA-
4A chassis. Screen size is the only difference between the two models.
They share the following features with the previous RA-4 models:
•
Advanced Pro-Optic System – Sony technology that allows full cor-
ner to corner focusing.
•
New Extended Definition CRT – Allows corner to corner focusing to
be increased by 25% over last year’s model.
•
MICROFOCUS Lens System
•
Digital Reality Creation (DRC) – DRC uses line doubling and pat-
tern recognition algorithms to take the NTSC signal to a near HDTV
equivalent.
•
Auto Focus – Allows the setting of V and H center and skew by the
customer at the touch of a button. This system differs from the one
used by RA-3 because it does centering and skew.
•
Full Digital Convergence – Allows the servicer to converge the set
in the coarse and fine modes. The fine mode uses a point to point
system for adjusting. It is the same system used in the RA-3 chassis.
•
High Performance Video Processor
•
3D Digital Comb Filter
•
Brightview Dual Component Screen – The screen contains a Thin
Film Fresnel that brightens and sharpens the picture, and a Fine Pitch
Lenticular screen that achieves higher resolution by using black stripes
to increase contrast.
•
Built-in High Contrast Screen
•
First Surface Mirror
•
Advanced Velocity Modulation
•
Advanced High Voltage Regulation – Eliminates distortion and fo-
cus fluctuations that occur when changes in brightness levels cause
changes in the high voltage.
•
Noise Reduction
•
Shading Compensation – Eliminates color shift and hot spots that
can occur due to the angle of the picture tubes to the mirror.
•
Wideband Video Amplifier
•
Multi Image Driver – Digital-editing technology that provides versatil-
ity in controlling on-screen images. Used in Picture and Picture and
Channel Index modes.
•
Twin View Picture-in-Picture – Allows for viewing two pictures si-
multaneously and the ability to expand either image up to double its
normal size.
•
Free Layout Picture-in-Picture – Allows the PIP window to be placed
anywhere on the screen.
•
XDS (Extended Data Service) – Receives data information services
that some stations may broadcast. This data includes time, station
call letters, etc.
•
Dolby Pro Logic Surround Sound
•
Center speaker input for use with a separate Dolby Pro Logic A/
V Receiver