Sony TMRIF-630-R Service manual
TMR-IF630R
SERVICE MANUAL
Ver 1.0 2000.12
TMR-IF630R is the component model block one in the MDR-IF630RK.
COMPONENT MODEL NAME FOR MDR-IF630RK
Headphones MDR-IF630R
Transmitter TMR-IF630R
US Model
AEP Model
UK Model
E Model
Tourist Model
SPECIFICATIONS
General
Modulation system Frequency modulation
Carrier frequency Right 2.8 MHz
Transmitter
Power source DC IN 9V jack accepts power supplied from the
Where purchased Operating voltage
U.S.A. 120 V AC, 60 Hz
U.K. 220 – 230 V AC, 50 Hz
European countries 220 – 230 V AC, 50 Hz
Japan (except for Japanese 110 V/120 V/220 V/240V AC, 50/60 Hz
domestic model)
Other countries 220 – 230 V AC, 50/60Hz or
Audio input Phono jacks/stereo mini jack
Dimensions Approx. 130 x 135 x 150 mm
Mass Approx. 200 g (7 oz)
Design and specifications are subject to change without notice.
Left 2.3 MHz
AC power adaptor for use on the follo wing v oltages:
120 V AC, 60 Hz
(5 1/4 x 5 3/8 x 6 in) (w/h/d)
TRANSMITTER
Setting up the
transmitter
1
Connect the transmitter to audio/video
equipment. Select one of the hookups
below depending on the jack type:
To connect to a headphones jack
Set the INPUT SOURCE selector to
PHONES.
SECTION 1
GENERAL
ATT (attenuator) selector
If a loud sound is distorted when the transmitter
is connected to an audio output jack other than
the headphones jack, set the ATT selector on the
transmitter to -12 dB. The default setting of the
ATT selector is 0 dB.
ATT selector
ATT
–12dB0dB
This section is extracted
from instruction manual.
INPUT SOURCE
PHONESLINE
to AUDIO IN A jacks
Right channel
(red)
Connecting cord
(supplied)
Unimatch plug
adaptor
(supplied)
to headphones
jack (stereo
phone jack)
RBAL
AUDIO IN
to headphones
jack (stereo
mini jack)
Transmitter
DC IN 9V
Left channel
(white)
CD Walkman,
MD Walkman,
WALKMAN*,
TV, VCR, etc.
Flexible Circuit Board Repairing
• Keep the temperature of 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
or unsoldering.
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.
— 2 —
SECTION 2
d
)
DISASSEMBLY
Note : The equipment can be removed using the following procedure.
Set
Cabinet (top) TX BASE boar
TX LED board
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (TOP) 2-2.TX BASE BOARD
3
Cabinet (top
2
TX BASE board
2
LED board (CN1)
1
Claw
2-3. TX LED BOARD
1
Four screws (+P 2
2
Window, luminous
×
8)
4
TX LED board
a
1
Two screws (+P 2 × 6)
3
a
Two screws (+P 2 × 6)
— 3 —
SECTION 3
r
r
ELECTRICAL ADJUSTMENTS
Note :
1. The adjustments should be performed in the order given. (As a
general rule the transmitter section (TMR-IF630R) adjustments
should be completed before performing the headphones section (MDR-IF630R) adjustment.)
2. The adjustments and measurements should be performed for
both L-ch and R-ch unless otherwise indicated.
3. L-ch adjustment should be completed before performing R-ch
adjustment.
4. Supply 9 V dc to the transmitter section (TMR-IF630R) and
2.4 V dc to the headphones section (MDR-IF630R) as the power
voltage.
TRANSMITTER SECTION
[ OSCILLATING FREQUENCY ADJUSTMENT ]
Connection :
Frequency counte
TX BASE board
i
L-ch
TP11
TP13iR-ch
j
j
+
–
TP15iGND
j
Adjustment Procedure :
No signal state.
1. Connect the frequency counter to TP11 (L-ch) and TP13 (R-
ch) on the TX BASE board.
2. Adjust with L51 (L-ch) and L1 (R-ch) on the TX BASE board
so that the reading on the frequency counter becomes the specified value.
[ RF LEVEL ADJUSTMENT ]
Connection :
RF voltmete
TX BASE board
TP11 (L-ch)
TP13 (R-ch)
TP15 (GND)
+
–
Adjustment Procedure :
No signal state.
1. Connect the RF voltmeter to TP11 (L-ch) and TP13 (R-ch) on
the TX BASE board.
2. Adjust with RV51 (L-ch) and RV1 (R-ch) on the TX BASE
board so that the reading on the RF voltmeter becomes the specified value.
Specified V alue :
L-ch
R-ch
RV51
RV1
480 mV ± 2.5 mV
480 mV ± 2.5 mV
Specified Value :
L-ch
R-ch
L51
L1
2.3 MHz ± 2kHz
2.8 MHz ± 2kHz
Adjustment Location :
– TX BASE BOARD (Conductor side) –
RV51
RF level
adjustment
(L-ch)
L51
Oscillating frequency
adjustment
(L-ch)
TP15 (GND)
TP11 (L-ch)
TP13
(R-ch)
RV1
RF level
adjustment
(R-ch)
L1
Oscillating frequency
adjustment
(R-ch)
— 4 —
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