Read Sony HT-ST5 Service Manual online
HT-ST5
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
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.
Caution: The printed pattern (copper foil) may peel away if
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.
ADVANCE PREPARATION WHEN CONFIRMING OP-
ERATION
All of the units included in the HT-ST5 (SA-ST5/SA-WST5/Re-
mote control) are required to confi rming operation of SA-ST5.
Check in advance that you have all of the units.
ERATION
All of the units included in the HT-ST5 (SA-ST5/SA-WST5/Re-
mote control) are required to confi rming operation of SA-ST5.
Check in advance that you have all of the units.
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.
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.
“PRTECT (PROTECT)” APPEARS ON THE DISPLAY OF
THE BAR SPEAKER
THE BAR SPEAKER
q Press the ÒÄÆ (on/standby) button to turn off the system. After the
lamp disappears, disconnect the AC power cord (mains lead) then
ensure nothing is obstructing the ventilation holes of the system.
ensure nothing is obstructing the ventilation holes of the system.
NOTE THE REPAIRING OF MAIN BOARD
When the MAIN board installed in this unit is 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.
When the MAIN board installed in this unit is 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.
NOTE OF REPLACING THE IC3001, IC3003, IC3005
AND IC3007 ON THE AMP BOARD AND THE COM-
PLETE AMP BOARD
When IC3001, IC3003, IC3005 and IC3007 on the AMP board and
the complete AMP board are replaced, it is necessary to spread the
compound between the AMP board and the heat sink.
Spread the compound (THERMAL COMPOUND (G747)) refer-
ring to the fi gure below
AND IC3007 ON THE AMP BOARD AND THE COM-
PLETE AMP BOARD
When IC3001, IC3003, IC3005 and IC3007 on the AMP board and
the complete AMP board are replaced, it is necessary to spread the
compound between the AMP board and the heat sink.
Spread the compound (THERMAL COMPOUND (G747)) refer-
ring to the fi gure below
thermal compound (G747)
IC3001
IC3003
IC3005
IC3007
– AMP Board (Component Side) –
CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C914 or
C915, C967, C992) to discharge the capacitor (C914 or C915,
C967, C992).
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitor (C914 or
C915, C967, C992) to discharge the capacitor (C914 or C915,
C967, C992).
– POWER Board (Conductor Side) –
(US, Canadian and Taiwan models)
(US, Canadian and Taiwan models)
– POWER Board (Conductor Side) –
(Australian model)
(Australian model)
C914
800
:/2 W
C967
800
:/2 W
C992
800
:/2 W
C967
800
:/2 W
C992
800
:/2 W
C915
800
:/2 W
Ver. 1.1
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