Servicing Notes - Sony MDR-NC500D Servise Manual

UNLEADED SOLDER
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!
• Strong viscosity
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.
NOTE OF REPLACING THE IC501, IC551, IC601,
IC801 AND IC802 ON THE MAIN BOARD
IC501, IC551, IC601, IC801 and IC802 on the MAIN board can-
not exchange with single. When these parts on the MAIN board are
damaged, exchange the entire mounted board.
NOTE OF REPLACING THE IC402 ON THE CHARGER
BOARD
IC402 on the CHARGER board cannot exchange with single.
When this part on the CHARGER board is damaged, exchange the
entire mounted board.
SECTION 1

SERVICING NOTES

MDR-NC500D
3