Servicing Notes - Sony HT-ST9 Service Manual

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.
NOTE OF PERFORMING THE OPERATION CHECK IN
THE STATE THAT HEAT SINK WAS REMOVED
When performing the operation check in the state that this unit was
disassembled, it is possible to perform the operation check in the
state that heat sink was removed. But don't perform the operation
check in the long time, and perform the operation check in the
volume state as low as possible.
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor to discharge
the capacitor.
– POWER Board (Conductor Side) –
C914
(US, Canadian and Taiwan models)
– POWER Board (Conductor Side) –
C915
(Except US, Canadian and
Taiwan models)
800 /2 W
SECTION 1

SERVICING NOTES

800 /2 W
MODEL IDENTIFICATION
Distinguish by Part No. and Destination code on the rear side of
a main unit.
– Rear view –
MODEL NUMBER LABEL
Destination code
Destination
US and Canadian models 4-562-118-0[]
AEP model
4-562-118-2[]
UK model 4-562-118-3[]
Russian model 4-562-118-4[]
Singapore model 4-562-118-7[]
Chinese model 4-562-118-8[]
Australian model 4-562-118-9[]
Taiwan model 4-562-119-1[]
Latin American model 4-562-119-2[]
DESTINATION ABBREVIATIONS
The following abbreviations for model destinations are used in this
service manual.
• Abbreviations
AUS : Australian model
CH : Chinese model
CND : Canadian model
LA : Latin American model
RU : Russian model
SP : Singapore model
TW : Taiwan model
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All of the units included in the HT-ST9 (SA-ST9/SA-WST9/Re-
mote control) are required to confi rming operation of SA-ST9.
Check in advance that you have all of the units.
NOTE OF REPAIRING THE REPEATER_REP1, RE-
PEATER_REP2 OR KEY BOARDS
When the REPEATER_REP1, REPEATER_REP2 or KEY boards
installed by this unit are defective, replace the complete mounted
board.
The mounted parts cannot replace with single.
NOTE OF REPAIRING THE MB1406 BOARD
When MB1406 board installed by this unit are defective, replace
the complete mounted board.
The mounted parts cannot replace with single.
Block diagram and printed wiring board that have been described
on this service manual are for reference.
Schematic diagram have not described.
HT-ST9
Ver. 1.1
Part No.
Part No. Destination code
(UC2)
(CEL)
(CEK)
(RU3)
(SP1)
(CN4)
(AU1)
(TW2)
(LA9)
5