STR-DN840
5
SECTION 1
SERVICING NOTES
NOTE OF REPLACING THE Q550, Q551, Q600,
Q601, Q650, Q651, Q700, Q701, Q750, Q751, Q800,
Q801, Q850 AND Q851 ON THE MAIN BOARD
Replacement of Q550, Q551, Q600, Q601, Q650, Q651, Q700,
Q701, Q750, Q751, Q800, Q801, Q850 AND Q851 on the MAIN
board used in this unit requires L type screw driver.
MODEL IDENTIFICATION
–BACK PANEL–
Model
Part No.
US, Canadian
4-454-452-0
[]
AEP, UK
4-454-452-1
[]
Australian
4-454-452-2
[]
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 IC3506 ON THE DIGITAL
BOARD
IC3506 on the DIGITAL board cannot exchange with single.
When this part on the DIGITAL board is damaged, exchange the
entire mounted board.
NOTE OF REPLACING THE IC901 ON THE STANDBY
BOARD
IC901 on the STANDBY board cannot exchange with single.
When this part on the STANDBY board is damaged, exchange the
entire mounted board.
Part No.
L type screw driver
(e.g Compact 90 degree right
angled ratchet screwdriver (dr-05))
Summary of Contents for STR-DN840
Page 99: ...MEMO STR DN840 99 ...
