Servicing Notes - Sony HT-CT380 Service Manual

HT-CT380/CT381
Ver. 1.1
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.
MODEL IDENTIFICATION
Distinguish by Part No., destination code and color on the bottom side of the main unit.
MODEL LABEL
Model Part No.
SA-CT380: US,CND 4-559-882-0[]
SA-CT380: AEP 4-559-883-0[]
SA-CT380: EA3 4-564-730-0[]
SA-CT381: AEP 4-564-737-0[]
SA-CT381: UK 4-565-719-0[]
SA-CT380: UK 4-565-720-0[]
SA-CT380: PX 4-565-721-0[]
SA-CT380: SP
4-565-722-0[]
SA-CT380: E3
4-565-729-0[]
SA-CT380: AUS 4-565-730-0[]
4
SECTION 1

SERVICING NOTES

CAPACITOR ELECTRICAL DISCHARGE PROCESSING
When checking the board, for the electric shock prevention, con-
nect the resistors to both ends of respective capacitors to discharge
the capacitor.
Note 1: When the connector that connects the POWER board to the MAIN
Note 2: Be sure to discharge using a resistor of 800 Ω or higher.
– Bottom view –
Part No.
Destination code
Destination code
UC2
CEL/B
EA3
CEL/S
CEK/S
CEK/B
PX3
SP1
E3
AU1
board is disconnected before discharging, completely fi nish dis-
charging both boards, and then reconnect the connector. If dis-
charging is not complete, sparking may occur when connecting the
connector and cause a blown fuse.
(Do not discharge with a 0 Ω resistor)
Discharging at a location where excessive electric current fl ows
through a fuse may cause the fuse to blow.
– MAIN Board (Side A) –
– POWER Board (Conductor Side) –
C914 (US and Canadian models)
C915 (Except US and Canadian models)
C967
800 /2 W
C3015
800 /2 W
800 /2 W
C3016
800 /2 W