Servicing Notes - Sony HT-ST5000 Service Manual

HT-ST5000
The SERVICING NOTES contains important information for servicing. Be sure to read this section before repairing the unit.
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.
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All of the units included in the HT-ST5000 (SA-ST5000/SA-
WST5000/Remote control) are required to confi rming operation of
SA-ST5000. Check in advance that you have all of the units.
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 the specifi ed capacitor with referring to the
fi gure below.
Note: Be sure to discharge using a resistor of 800  or higher.
– BAR POWER Board (Conductor Side) –
800 /2 W
C916 (US, CND)
C918 (AEP, UK)
NOTE OF PERFORMING THE OPERATION CHECK IN
THE STATE THAT HEAT SINK IS REMOVED
When performing the operation check in the state that this unit is
disassembled, it is possible to perform the operation check in the
state that heat sink is removed. However, don't perform the opera-
tion check in the long time, and perform the operation check in the
volume state as low as possible.
In addition, notice that the board becomes heat just by the state of
turn on electricity because the this unit has many channels.
4
SECTION 1

SERVICING NOTES

800 /2 W
C923
MODEL IDENTIFICATION
Distinguish by Part No. and Destination code of the model number
label on the rear side of the main unit.
MODEL NUMBER LABEL
Destination Part No.
US, CND models 4-691-105-0[]
AEP model 4-691-107-0[]
UK model
4-696-348-0[]
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AEP : European (Except for Ireland, UK), Eastern Europe area,
CIS area (Moldova) and Middle East area (Jordan) mod-
els
CND : Canadian and Latin American area (Puerto Rico) models
UK : UK and Ireland models
– Rear view –
Part No.
Destination code
Destination code
UC2
CEL
CEK