Sony MDRIF-330-R Service manual
MDR-IF230/IF330R
SERVICE MANUAL
Ver 1.1 2000. 06
Illustration : MDR-IF330R
MDR-IF230 is the component model block one in the MDR-IF130K
or MDR-IF230RK.
MDR-IF330R is the component model block one in the MDR-IF330RK.
COMPONENT MODEL NAME FOR MDR-IF130K/IF230RK/IF330RK
MDR-IF130K MDR-IF230RK MDR-IF330RK
Cordless Headphones MDR-IF230 MDR-IF230 MDR-IF330R
Transmitter TMR-IF130 TMR-IF230R TMR-IF330R
US Model
Canadian Model
E Model
Australian Model
MDR-IF230/IF330R
Tourist Model
MDR-IF330R
SPECIFICATIONS
Headphone
Charging and using hours (MDR-IF330R)
Approx. charging hours Approx. using hours*
1 1.5
24** 30
* at 1kHz 1mW + 1mW output
** the hours required to fully charge an cmpty battery
Battery life* (MDR-IF230/IF330R)
Battery Approx. hours
Sony alkaline battery LR6(SG) 100
Sony battery R6P(SR) 50
* at 1kHz 1mW + 1mW output
Power source Supplied Ni-Cd rechargeable battery NC-AA(HJ)
Mass Approx. 180g (6.4oz.) including battery
Supplied Ni-Cd rechargeable battery
Model name NC-AA (HJ)
Type Ni-Cd
Voltage 1.2V
Capacity 600mAh
Design and specifications are subject to change without notice.
or commercially available R6 (size AA) dry battery
CORDLESS STEREO HEADPHONES
MICROFILM
SECTION 1
)
DISASSEMBLY
r
The equipment can be remo ved using the f ollowing pr ocedure .
Set
Note : Follow the disassembly procedure in the numerical order given.
1-1. RX BOARD REMOVAL
Cover (R), hanger RX board
Cover (L), hanger
PD board
Cover (R), hanger
1-2. PD BOARD REMOVAL
Pat, ear
6
RX board
Hanger (R)
2
Screw
(M 1.7x4)
7
4
Screw +P (2x6)
5
Screw +P (2x6)
3
5
Screw +P (2x6)
4
Screws +P (2x6)
4
Screws +P (2x6)
2
Screw (M 1.7x4
SP2
1
Lid, battery case
Pat, ear
1
SP1
4
Screw +P (2x6)
3
– 2 –
PD board
8
7
Cover (L), hanger
Hanger (L)
6
SECTION 2
)
ELECTRICAL ADJUSTMENT
TMR-IF330R
Note :
1. The transmitter section adjustments should be completed before
performing the headphones section adjustment.
2. On adjusting the headphones section, use the transmitter as a
jig.
Headphones Transmitter
MDR-IF230 or
TMR-IF130
TMR-IF230R
MDR-IF330R TMR-IF330R
3. The headphones section adjustment must be made with PD board
connected to the RX board with the specified wire.
4. The MUTE ON POINT adjustment must be made while taking
care of the photodiodes (D1, D2, D101, D102) not to be exposed directly to external lights (such as incandescent lamp and
sun light).
Connection and Adjustment Location :
[RX BOARD] (Conductor side)
distortion
meter
TUNING Adjustment
Preparation :
AF OSC
AUDIO IN B jack (J1)
1kHz 245mV (–10dB)
ATT
600
Ω
Jig
Transmitter
J4
power supply
(DC 9V)
1. Feed a signal to jig (transmitter) and connect a power supply to
DC IN 9V jack (J4).
2. Appl y DC 1.2V between TP (VCC) and TP (GND) on the RX
board.
3. Set the R V1 (V OL) on the RX boar d to the minim um position.
Procedure :
1. Connect the distor tion meter to TP31 (L-c h) and TP51 (R-c h).
2. T urn on the po wer.
3. Adjust with L32 (L-ch) and L53 (R-ch) to minimize the reading
on the distor tion meter .
regulated DC
power suppluy
MUTE ON POINT Adjustment
Connection and Adjustments Location :
[RX BOARD] (Conductor side)
RV2 : Mute ON point
Adjustment
TP3
TP2
TP3
RV2
TP2
TP51
(R-CH)
TP31
TP51
(R-CH)
C35
TP51
level meter
C55
TP (VCC)
TP
(GND)
TP
(VCC)
TP (GND)
TP
(SW)
regulated DC
power suppluy
(output :1.2V DC)
RV1 (VOL)
TP3
TP2
TP31
(L-CH)
TP31
L53
TP51
(R-CH)
TP51
C35
C55
L32
L 1
TP
(VCC)
TP (VCC)
TP (GND)
TP
(GND)
TP
(SW)
C 3
(output :1.2V DC)
L32 : Tuning Adjustment (L-CH
L53 : Tuning Adjustment (R-CH)
FM RF signal
generator
0.1µF
10k
Ω
TP (SIG)
Carrier frequency : 2.8MHz
Modulation : 1kHz
Deviation : 16kHz
Output level : 34dB
µ
V
Procedure :
1. Shor t the cir cuit between TP2 and TP3.
2. Note down the level meter read at this time.
3. Release the shor t-cir cuit between TP2 and TP3.
4. Adjust R V2 so that the le vel meter read is 5dB to 10dB belo w
the value noted down at step 2.
L 1
TP
(SIG)
C 3
– 3 – – 4 –
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