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TMR-IF630R
US Model
AEP Model
UK Model
E Model
Tourist Model
SERVICE MANUAL
TRANSMITTER
SPECIFICATIONS
Headphones
MDR-IF630R
Transmitter
TMR-IF630R
TMR-IF630R is the component model block one in the MDR-IF630RK.
COMPONENT MODEL NAME FOR MDR-IF630RK
General
Modulation system Frequency modulation
Carrier frequency
Right 2.8 MHz
Left 2.3 MHz
Transmitter
Power source
DC IN 9V jack accepts power supplied from the
AC power adaptor for use on the following voltages:
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
120 V AC, 60 Hz
Audio input
Phono jacks/stereo mini jack
Dimensions
Approx. 130 x 135 x 150 mm
(5 1/4 x 5 3/8 x 6 in) (w/h/d)
Mass
Approx. 200 g (7 oz)
Design and specifications are subject to change without notice.
Ver 1.0 2000.12


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-- 2 --
SECTION 1
GENERAL
This section is extracted
from instruction manual.
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.
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.
DC IN 9V
R
BA
L
AUDIO IN
PHONES
LINE
INPUT SOURCE
Transmitter
Left channel
(white)
Right channel
(red)
Unimatch plug
adaptor
(supplied)
CD Walkman,
MD Walkman,
WALKMAN*,
TV, VCR, etc.
to headphones
jack (stereo
mini jack)
Connecting cord
(supplied)
to AUDIO IN A jacks
to headphones
jack (stereo
phone jack)
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.
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
­12dB
0dB
ATT selector


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-- 3 --
SECTION 2
DISASSEMBLY
2-1. CABINET (TOP)
2-2.TX BASE BOARD
Note : Follow the disassembly procedure in the numerical order given.
2-3. TX LED BOARD
Set
Cabinet (top)
TX BASE board
TX LED board
Note : The equipment can be removed using the following procedure.
3
Cabinet (top)
1
Four screws (+P 2
× 8)
2
LED board (CN1)
2
TX BASE board
1
Claw
1
Two screws (+P 2
× 6)
3
Two screws (+P 2
× 6)
4
TX LED board
2
Window, luminous
a
a


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-- 4 --
SECTION 3
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 sec-
tion (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 :
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 speci-
fied value.
Specified Value :
[ RF LEVEL ADJUSTMENT ]
Connection :
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 speci-
fied value.
Specified Value :
TX BASE board
TP11(L-ch)
TP13(R-ch)
RF voltmeter
+
­
TP15 (GND)
TX BASE board
TP11 iL-ch j
TP13 iR-ch j
+
­
TP15 iGND j
Frequency counter
L-ch
R-ch
L51
L1
2.3 MHz ± 2kHz
2.8 MHz ± 2kHz
L-ch
R-ch
RV51
RV1
480 mV ± 2.5 mV
480 mV ± 2.5 mV
Adjustment Location :
­ TX BASE BOARD (Conductor side) ­
RV51
RF level
adjustment
(L-ch)
RV1
RF level
adjustment
(R-ch)
L51
Oscillating frequency
adjustment
(L-ch)
L1
Oscillating frequency
adjustment
(R-ch)
TP13
(R-ch)
TP11 (L-ch)
TP15 (GND)


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TMR-IF630R
4-1. BLOCK DIAGRAM
-- 5 --
-- 6 --
SECTION 4
DIAGRAMS
L
J3
J1
SW1
R
A
AUDIO
IN
B
LINE
INPUT
SOURSE
SW2
J4
+9V
9
3
13
7
1
5
IC1
ALC AMP.
VCC
IN2
IN1
Q30
OUT2
2
7
IC601
COMPRESSOR
OSCILLATOR/
MODULATOR
D51,Q51
INPUT
L-CH
L51
2.3MHz
OSC COIL
L52
C60-C62
OUT
8
6
VCC
OUT1
-
+
VREF
G.CELL
LPF
Q52
RV51
RF LEVEL
BUFFER
(CHG)
Q54
LED DRIVE
Q53
+9V
LED DRIVE
2
7
IC602
COMPRESSOR
OSCILLATOR/
MODULATOR
D1,Q1
INPUT
R-CH
L1
2.8MHz
OSC COIL
L2
C10-C12
+5V
+5V
OUT
10
9
IC603
TIMER
VDD
8 TIMER OUT
TIMER OUT
8
6
VCC
-
+
VREF
G.CELL
LPF
Q2
RV1
RF LEVEL
BUFFER
Q4
LED DRIVE
Q3
LED DRIVE
D30
(IR LED)
D33
D34
D37
D38
PHONES
0dB
ATT
DC IN 9V
-12dB
LEFT
RIGHT
RIPPLE
FILTER
Q605
PULSE
GEN
Q604
CHG LED
DRIVE
IC2
D601
Q601
+5V REG.
IC3,Q32
AUDIO
INPUT DET
IC604(2/2)
IC604(1/2)
CHARGE2
BATTERY
SENSE
Q33-Q35
AUTO ON/OFF
Q603
CHARGE OUT
Q606,Q607
RF POWER OFF
Q602
CHARGE1
16
Signal path.
: RF
: ANALOG
TO
MDR-IF630R
(BATTERY CHARGER)