Sony MDR-RF920R, Руководство по обслуживанию

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2
MDR-RF920R/RF960R
TABLE OF CONTENTS
Specifications ............................................................................ 1
1. GENERAL
................................................................... 2
2. DISASSEMBLY
2-1. Disassembly Flow ................................................... 3
2-2. Front Plate (R) Assy ................................................ 3
2-3. Front Plate (L) Assy ................................................ 4
2-4. SW Board ................................................................ 5
2-5. How to Hang The Tension Spring ........................... 5
3. ELECTRICAL ADJUSTMENTS
.......................... 7
3-1. Free Run Frequency Check and Adjustment ........... 7
3-2. Receive Frequency Check and Adjustment ............ 7
3-3. Carrier Modulation Check ...................................... 7
3-4. Separation Check .................................................... 7
3-5. Free Run Frequency Check and Adjustment ........... 8
3-6. Receive Frequency Check and Adjustment ............ 8
3-7. Carrier Modulation Check ...................................... 8
3-8. Separation Check .................................................... 8
4. DIAGRAMS
4-1. Block Diagrams ............................................................... 11
4-2. Schematic Diagram – RX-Base Section (RF920R)– ...... 12
4-3. Schematic Diagram – RX-Base Section (RF960R)– ...... 13
4-4. Printed Wiring Boards– RX-Base Section– .................... 14
4-5. Schematic Diagram – RX-FE Section– ........................... 15
4-6. Printed Wiring Boards– RX-FE Section– ....................... 16
5. EXPLODED VIEWS
................................................. 17
6. ELECTRICAL PARTS LIST
.................................. 18
SECTION 1
GENERAL
5
Turn up the volume to a moderate
level with the VOL control.
A
MDR-RF960R
Press the TUNE button briefly for
automatic tuning of the headphones.
If you do not receive a clear audio
signal, press it again.
B
MDR-RF920R
Tune the headphones into the frequency
of the transmitter with the TUNE
control until you can hear the audio
signal loud and clear.
Follow steps 3 and 5 above until the
receiving performance becomes better.
off when the y are taken off
– Auto power on/off function
Do not pull up the self-adjusting band when not
in use, as this will consume the battery power.
VOL control
VOL control
TUNE
TUNE
TUNE
button
TUNE
control
The headphones automatically turn
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270
°
C
during repairing.
• Do not touch the soldering iron on the same conductor of
the circuit board (within 3 times).
• Be careful not to apply force on the conductor when
soldering
This section is extracted
from instruction manual.