Sony DTV-01, Руководство пользователя

Страница: 129 / 132

iv
Board Replacement
Board Removal Functions Possible Failure Symptom(s) After board replacement
A
The A board is plugged into
the G board and secured
with a plastic L bracket.
Remove the plastic L
bracket from the G board by
squeezing the tabs under
the G board. Input Video & DVD
switching, Y/C separation,
Closed Caption, Main and
Sub tuners and picture
processing. 1. Loss of color, or luminance (B & V boards also
possible).
2. Inability to receive TV, PIP, Video, DVD or standard
definition (SD) Digital TV. (B board also possible).
3. No closed caption in the main or sub pictures.
May have to program TV stations in
again for faster station capture.
Verify PIP, DVD and Video inputs
work.
V
The V board is plugged into
the G board. Pry the socket
tabs outward while rocking
the V board out. Digital processing for
standard definition (525 line)
input, PIP processing. 1. Solariztion (bright splotches in the picture).
2. Large squares in the picture.
3. One picture missing in twin view (A board also
possible).
4. Noise in the main picture but not in the Twin View.
5. Loss of color, or luminance (A & B boards also
possible).
6. Standby light blinks 6 times pauses and repeats
(+5VOCP)
Verify main NTSC and Twin View
pictures.
Transplant shielding to new board.
Check to see that contrast and color
levels are similar when switching
between NTSC and DTV pictures. If
not, follow the procedure is on pages
___ of the adjustment manual.
B
The B board is plugged into
the G board and secured
with a plastic L bracket.
Remove the plastic L
bracket from the G board by
squeezing the tabs under
the G board.
Note that white connectors
CN3002 & CN3007 are not
used. Main Micro Processing,
Sound Effect Processing for
Dolby inputs,
Video Processing,
Video & some deflection
memory. 1. No OSD menu or channel numbers (also no sync from
D, or M, board).
2. No or constant audio or video muting.
3. Inconstant contrast or color between the Twin View
pictures, Full width NTSC and DTV pictures.
4. Distorted or no sound effects (Thru-Sourround and
Simulated).
5. Can not select Main Video and/or HDTV video signal
from the set-back box (Setback box also possible).
Sound switches OK but no video.
6. No vertical or horizontal sync (M board also possible).
7. Will not hold last volume level at power off.
8. Will not hold individual settings for the 7 picture sizes
(normal, full, zoom, etc).
9. Standby light blinks 5 times pauses and repeats (IK
white balance failure).
♦
Transplant memory IC3252 in an
anti -static atmosphere or
♦
Enter the service mode and press
08 enter to load defaults into a
blank memory.
♦
Adjust the contrast, color level and
hue for the two Twin View
pictures, Full width NTSC and
DTV picture so the picture is of
equal contrast and color intensity
as the pictures are switched. The
procedure is on pages ___ of the
adjustment manual.
♦
Perform the size adjustments for
all the 7 picture sizes (normal, full,
zoom, etc) on pages _____ of the
adjustment manual.