Table Of Contents; General - Sony DR-BT22 Service Manual

DR-BT22

TABLE OF CONTENTS

1. GENERAL
................................................................... 2
2. DISASSEMBLY
2-1. Driver (SP301) ................................................................. 3
2-2. Housing (R) ..................................................................... 4
2-3. MAIN Board .................................................................... 4
2-4. Driver (SP302) ................................................................. 5
2-5. Housing (L) ..................................................................... 5
2-6. CHARGER Board ........................................................... 6
3. DIAGRAMS
3-1. Block Diagram ................................................................ 8
3-2. Printed Wiring Boards ..................................................... 9
3-3. Schematic Diagram ......................................................... 10
4. EXPLODED VIEWS
4-1. Housing (R) Section ........................................................ 11
4-2. Housing (L) Section ........................................................ 12
5. ELECTRICAL PARTS LIST
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.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.
Location and Function of Parts
qg
qf
7
8
qd
9
q;
qs
qa
2
.................................. 13
SECTION 1

GENERAL

1
2
3
4
5
6
•
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.
• IC101 (CXN1450-2ABL) on MAIN board cannot be replaced
individually.
Replace it with "MAIN BOARD, COMPLETE".
1 R (right) indication
2 Right (R) unit
3 Multi function button
Controls various call functions.
4 POWER button
5 Microphone
6 RESET button
Push this button when this unit
does not operate properly.
Pairing information is not
deleted by this operation.
7 VOL (volume) +*⁄-
buttons
8 Indicator (blue)
Indicates the communication
status of the unit.
This section is extracted
from instruction manual.
9 Indicator (red)
Indicates the power status of
the unit.
q; Jog switch
Controls various functions
when listening to music.
qa Ear pad
qs DC IN 3 V jack
qd Left (L) unit
qf L (left) indication
qg Headband
* This button has a tactile dot.