Sony MDRIF-540-R Service manual
MDR-IF540R
SERVICE MANUAL
Ver 1.0 2003. 03
• The MDR-IF540R is the headphones
that comprises the MDR-IF540RK.
SRS is a trademark of SRS Labs Inc.
SRS Headphones are manufactured under
license from SRS Labs. Inc.
• MDR-IF540RK consists of the following models respectively.
Headphones MDR-IF540R
Transmitter TMR-IF540R
US Model
Canadian Model
E Model
Tourist Model
SPECIFICATIONS
Headphones
Power source Supplied rechargeable
nickel-metal hydride
batteries BP-HP550 or
commercially available
(size AAA) dry batteries
Mass Approx. 285 g (11 oz.)
including batteries
Design and specifications are subject to change without
notice.
9-877-225-01
2003C0400-1
© 2003. 03
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.
HEADPHONES
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
1
MDR-IF540R
TABLE OF CONTENTS
1. GENERAL
Charging the supplied rechargeable batteries.......................... 3
Listening to a programme........................................................ 6
2. DISASSEMBL Y
2-1. Front Plate (R) Assy............................................................ 8
2-2. RX Board ............................................................................ 9
2-3. Hanger (R)........................................................................... 9
2-4. Wiring on the Right Side ................................................... 10
2-5. Front Plate (L) Assy .......................................................... 10
2-6. BATT Board ...................................................................... 11
2-7. Hanger (L) ......................................................................... 11
2-8. Wiring on the Left Side ..................................................... 12
2-9. Hanger Lid (L) .................................................................. 12
2-10. Wiring on the SW Board ................................................... 13
2-11. Hang the Tension Spring ...................................................13
3. ELECTRICAL ADJUSTMENTS
Tuning Adjustment ................................................................14
Mute ON Position Adjustment .............................................. 14
4. DIAGRAMS
4-1. Circuit Boards Location .................................................... 16
4-2. Block Diagram – Receiver Section – ................................ 17
4-3. Printed Wiring Boards – Receiver Section (1/2) – ............ 18
4-4. Printed Wiring Board – Receiver Section (2/2) –..............19
4-5. Printed Wiring Boards – Power Section (1/2) – ................ 20
4-6. Printed Wiring Board – Power Section (2/2) – ................. 21
4-7. Schematic Diagram – Receiver Section – ......................... 22
4-8. IC Block Diagrams............................................................ 23
5. EXPLODED VIEWS
5-1. Housing (L) Assy Section ................................................. 24
5-2. Housing (R) Assy Section ................................................. 25
6. ELECTRICAL PARTS LIST ........................................ 26
2
SECTION 1
GENERAL
MDR-IF540R
This section is extracted
from instruction manual.
3
MDR-IF540R
4
MDR-IF540R
5
MDR-IF540R
6
MDR-IF540R
7
MDR-IF540R
SECTION 2
DISASSEMBLY
Note : This set can be disassemble according to the following sequence.
SET
2-1. FRONT PLATE (R) ASSY
(Page 8)
2-2. RX BOARD
(Page 9)
2-3. HANGER (R)
(Page 9)
2-4. WIRING ON THE
RIGHT SIDE
(Page 10)
2-5. FRONT PLATE (L) ASSY
(Page 10)
2-6. BATT BOARD
(Page 11)
2-7. HANGER (L)
(Page 11)
2-8. WIRING ON THE
LEFT SIDE
(Page 12)
2-9. HANGER LID (L)
(Page 12)
2-10. WIRING ON THE
SW BOARD
(Page 13)
2-11. HANG THE
TENSION SPRING
(Page 13)
Note : Follow the disassembly procedure in the numerical order given.
2-1. FRONT PLATE (R) ASSY
4
housing (R) assy
2
P 2.6x6
Removal the solder at 2 places.
Note for installation : Solder the leads at the
driver (R-CH) side
red
places shown below with
attention to their colors.
natural
from RX board
1
ear pad (R)
5
front plate (R) assy
3
P 2.6x6
8
2-2. RX BOARD
1
Removal the solder at 12 places.
Note for installation : Solder the leads at the
MDR-IF540R
places shown below with
attention to their colors.
Note : Insert this in the LED hole
in the housing (R) assy
when installing.
2-3. HANGER (R)
housing (R) assy
2
3
S301
RX board
S1
natural
to motor
white
black
red
blue
red
natural
red
G/N
natural
natural
green
to driver
red
1
P 2.6x6
Pay attention to the leads
when assembling.
4
hanger lid (R)
Pay attention to the leads
when assembling.
2
projection
5
3
hanger (R)
9
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