Read Sony STR-DH740 Service Manual online
4
STR-DH740
SECTION 1
SERVICING NOTES
Part No.
MODEL IDENTIFICATION
–BACK PANEL–
–BACK PANEL–
Model
Part No.
US, Canadian
4-448-712-0[]
AEP
4-448-712-2[]
Australian
4-448-712-3[]
Taiwan
4-448-712-4[]
Mexican
4-448-712-5[]
Notes on chip component replacement
•
•
Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
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
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
• 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.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
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.
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.
also be added to ordinary solder.
Special Component Notice
The components identified by mark
The components identified by mark
9 contain confidential
information.
Strictly follow the instructions whenever the components are
repaired and/or replaced.
Strictly follow the instructions whenever the components are
repaired and/or replaced.
Notice pour composants spéciaux
Les composants identifiés par la marque
Les composants identifiés par la marque
9 contiennent des
informations confi dentielles.
Suivre scrupuleusement les instructions chaque fois qu’un com-
posant est remplacé et / ou réparé.
Suivre scrupuleusement les instructions chaque fois qu’un com-
posant est remplacé et / ou réparé.
NOTE OF REPLACING THE IC1902, IC1903 AND
IC1904 ON THE DCDC BOARD
IC1902, IC1903 and IC1904 on the DCDC board cannot exchange
with single. When these parts on the DCDC board are damaged,
exchange the entire mounted board.
IC1904 ON THE DCDC BOARD
IC1902, IC1903 and IC1904 on the DCDC board cannot exchange
with single. When these parts on the DCDC board are damaged,
exchange the entire mounted board.
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.
BOARD
IC3506 on the DIGITAL board cannot exchange with single.
When this part on the DIGITAL board is damaged, exchange the
entire mounted board.
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