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”.
