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Extracted text from sony dr bt 1 k service manual (Ocr-read)
Page 1
DR-BT1/BT1K
2
TABLE OF CONTENTS
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
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 flow)
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.
1. SERVICING NOTES ........................................................ 3
2. GENERAL ........................................................................\
... 3
3. DIAGRAMS
3-1. Block Diagrams ··················\
··················\
··················\
······ 5
3-2. Printed Wiring Boards -“ Headset Board-“ ··················\
·· 6
3-3. Schematic Diagram -“ Headset Board-“ ··················\
······ 7
3-4. Printed Wiring Boards -“ Adaptor Board (BT1K only)-“ ··················\
················ 8
3-5. Schematic Diagram -“ Adaptor Board (BT1K only)-“ ··· 9
3-6. Printed Wiring Boards -“ Charger Board (BT1 only)-“ ··················\
················· 10
3-7. Schematic Diagram -“ Charger Board (BT1 only)-“ ···· 11
4. EXPLODED VIEWS
4-1. Headset Section ··················\
··················\
··················\
···· 12
4-2. Adaptor Section (BT1K) ··················\
··················\
········ 13
4-3. Charger Section (BT1) ··················\
··················\
··········· 14
5. ELECTRICAL PARTS LIST ........................................ 15
-MOD2 (bluetooth module), IC7 (+2.8V REG) on
HEADSET board cannot be replaced individually.
Replace it with HEADSET BOARD, COMPLETE.
- MOD1 (bluetooth module) on ADAPTOR board cannot be
replaced individually.
Replace it with ADAPTOR BOARD, COMPLETE.
Page 2
DR-BT1/BT1K
3
SECTION 1
SERVICING NOTES
In case of replacing a nickel hydrogen battery in the adaptor (BT-1K), replace two battery pads and a battery sheet at the same time.
two battery padsbattery sheetcabinet (lower
)
nickel hydrogen battery
SECTION 2
GENERAL This section is extracted
from instruction manual.
Identifying
Bluetooth earset
R
L
123
4
5
6
7
8
1Hanger
2Multifunction button
Controls various functions of the Bluetooth earset.
3LED indicator Indicates the status of the Bluetooth earset.
4VOLUME +
5VOLUME -
6Pipe microphone
7Housing
8Contact terminals
Bluetooth earset adaptor (BT1K only)
1
3 45
6
2
1LED indicator Indicates the status of the Bluetooth earset adaptor.
2Power on button
3Pairing / Power off button
4Contact pins
5Belt clip
6DC IN 4.5 V jack
Battery charger (BT1 only)
1
2
3
1Contact pins
2Belt clip
3DC IN 4.5 V jack