Sony STR-DH590, Руководство по обслуживанию

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STR-DH590
4
SECTION 1
SERVICING NOTES
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 FUSE
The fuse is or could be in the neutral. When a fuse is being re-
placed, the main plug shall be disconnected from the AC outlet to
prevent electric shock.
DISCHARGE PROCESSING
Before checking the operation of the boards for the electric shock
prevention, perform the discharge processing by connecting the
resistor at both ends of capacitor with referring to the
fi gure below.
Note:
Be sure to use a resistor of 800

or higher for discharge.
– MAIN Board (Conductor Side) –
C272
C271
800
:
/2 W
800
:
/2 W
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian and New Zealand models
CND : Canadian model
MODEL IDENTIFICATION
Distinguish by Part No. and Destination code of the model number
label on the rear side of the main unit.
The US and CND models are printed to back panel, not a label.
MODEL NUMBER LABEL
AUS
– Rear view –
US, CND (printed, no label)
Part No.
Destination code
(Part No. and destination code
are not printed)
Destination Part No. Destination code
US, CND models – –
AUS model 4-732-710-0
[]
(AU1)