Replacing The Battery; Performance And Specifications Of This Unit; Unleaded Solder - Sony FWD-40LX1 Service Manual

1-8. Replacing the Battery

The lithium battery for clock is mounted on the D3 board.
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When replacing the part, be sure to use the specified one
below.
Replacement with a part other than the specified part will
result in fire hazards and electric hazards.
Replacement part
Part name: Lithium battery (CR1220)
! 1-756-157-11
Part No.:
Replacing procedure
Refer to Section 1-5-2.
1-9. Performance and Specifications of
This Unit
1. Wide zoom
. No screen adjustment can be performed when the wide
zoom mode is selected.
→ Set wide switching to another mode so as to perform
screen adjustment and then switch the mode to the
wide zoom mode.
. The viewing of an image in which the wide zoom mode
is set may vary depending on the setting of a signal
format or cinema drive and the setting of an RGB mode.
2. Flicker of interlace signal
. Flicker may occur when the RGB mode of an RGB
signal is set to "PC".
→ Flicker can be alleviated by setting the RGB mode to
"DTV".
. During two-screen display, flicker occurs when the
vertical resolution of the displayed image becomes less
than a half. In a motion picture signal, however, the
flicker causes no problem during operation.
FWD-40LX1
3. Frame lock during two-screen display
During two-screen display, the image on the main screen
or left screen is frame-locked. The other image is not
frame-locked. Therefore, the display below may appear
when the vertical sync frequencies of both signals differ.
. Flicker occurs remarkably.
. Movement does not become smooth during motion
picture display.
In the cases described above, the trouble can be reduced by
making the vertical sync frequencies of both signals same
as each other.

1-10. Unleaded Solder

Boards requiring use of unleaded solder are printed with a
lead free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come
printed with the lead free mark due to their particular size.)
: LEAD FREE MARK
m
. Be sure to use the unleaded solder for the printed circuit
board printed with the lead free mark.
. The unleaded solder melts at a temperature about 40 dC
higher than the ordinary solder, therefore, it is recom-
mended to use the soldering iron having a temperature
regulator.
. The ordinary soldering iron can be used but the iron tip
has to be applied to the solder joint for a slightly longer
time. The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful.
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