Sony DTV-01 Manual page 5

How to use this book for servicing
When encountering this TV set for servicing there are several things you
need to know. Below is a list of the necessary servicing items and where
to locate them:
Servicing Needs
Information
1. Hookup / Operation / Normal
Operation
2. External HDTV set-back box
indicator lights
3. Location of power handling parts
and fuses
4. Standby light indication message &
board determination
5. Shutdown troubleshooting plan
6. Power Supply, Deflection, Video
Selection and Signal Flow Circuitry
7. Focus Circuitry
8. Dynamic Convergence adjustments
9. Adjustments after tube replacement
Location
First document in this training
manual (Normal Operation)
Appendix
Service manual / visual
inspection of heat sinks
Service manual and
Protection Block document
Protect Circuitry 3 & 4
Circuitry in this training book.
See table of contents.
Circuitry in this training book
Service manual page 27
(same as in training manual
supplement)
Notes on using the service
mode follow this chart.
A list of register names are in
the service manual.
Training manual supplement
Service Mode Adjustment Notes
Because of this TV's complexity, the following precautions should be noted
while making service adjustments for convergence, video level, size, and
white balance or positioning:
1. The numerous service mode registers are usually grouped by ICs for
easy access. Use the remote's #2 and #5 button to change IC groups.
Then you can move from register to register with the #1 and #4 but-
tons.
2. Each register that controls the picture's size, deflection and position
(on pages 45-47 of the service manual) has seven sets of adjustment
data, one for each of the seven picture size modes. These settings do
not interact. Enter the service mode, adjust the TV during that picture
size, and store it.
Seven Picture Size Modes
NTSC or SD DTV
1. Normal 4:3
aspect ratio
2. Full 16:9 aspect
ratio
3. Zoom
1. Some registers are duplicated under different groups for ease of ad-
justments. These duplicated registers have the same name. Chang-
ing the register data at one location causes the data to change at the
other location as well.
2. Save adjustments often. Changing registers will hold the new data,
but changing picture sizes (zoom, full, caption, etc) will instantly lose
any unsaved data that was just held.
3. There are separate contrast, color level, and hue adjustments for:
¨ The main picture
¨ The HDTV picture
¨ Each twin view picture
They are adjusted for equal levels as you switch modes. This is so
the picture is not brighter in one mode than another.
2
HDTV
4. Wide Zoom 6. HDTV Full
5. Caption 7. HDTV Twin View
(Top & bottom pix
compressed)