Boards requiring use of unleaded solder are printed with the 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
Unleaded solder has the following characteristics.
Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
Unleaded solder is more viscous (sticky, less prone to ﬂ ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
– Back Panel –
DG920: US model
DG920: Canadian model
DA2400ES: US model
DA2400ES: AEP and UK models
DA2400ES: Continental European,
East European and
NOTE OF REPLACING THE IC3506 AND IC3508 ON
THE DIGITAL VIDEO BOARD
IC3506 and IC3508 on the DIGITAL VIDEO board cannot ex-
change with single. When IC3506 and IC3508 on the DIGITAL
VIDEO board are damaged, exchange the entire mounted board.
NOTE OF REPLACING THE IC5021 ON THE DSP
IC5021 on the DSP board cannot exchange with single. When
IC5021 on the DSP board is damaged, exchange the entire mount-
NOTE OF REPLACING THE IC8018 ON THE MICON
IC8018 on the MICON board cannot exchange with single. When
IC8018 on the MICON board is damaged, exchange the entire