Sony TMRIF-230 Service manual

TMR-IF130/IF230R

SERVICE MANUAL

Ver 1.0 1998. 05

Illustration : TMR-IF230R

TMR-IF130 is the component model block one in MDR-IF130K.
TMR-IF230R is the component model block one in MDR-IF230RK.

COMPONENT MODEL NAME FOR MDR-IF130K/IF230RK

MDR-IF130K MDR-IF230RK
Cordless Stereo Headphones MDR-IF230 MDR-IF230
Transmitter TMR-IF130 TMR-IF230R

US Model

TMR-IF230R

Canadian Model

E Model

Australian Model

TMR-IF130/IF230R

SECTION 1

ELECTRICAL ADJUSTMENT

NOTE :

1. The adjustments should be performed in the order given.

2. The adjustments and measurements should be perfomed for both
L-ch and R-ch unless otherwise indicated.

3. L-ch adjustment should be completed before performing R-ch
adjustment.

OSCILLATING FREQUENCY Adjustment

Procedure :

No signal state.

1. Connect the frequency counter to TP (CL4) (L-ch) and TP (CL-

54) (R-ch).

2. Adjust with RV1 (L-ch) and RV2 (R-ch) so that the reading on
the frequency counter becomes the specified value.

Specified Value:

L-ch RV1 2.3MHz ±2kHz
R-ch RV2 2.8MHz ±2kHz

Connection Points and Adjustments Location :

TP

(CL54)

(R-ch)

[TX BOARD]

(Conductor side)

TP
(CL4)
(L-ch)

frequency counter

SPECIFICATIONS

General

Modulation system Frequency modulation
Carrier frequency Right 2.8MHz

Frequency response 18 – 22,000Hz

Power source DC IN 9V jack accepts power supplied from the AC

US, Canadian,
Central & South America model
Australian model 240V AC,50Hz
E model 220 - 230V AC,50Hz

Audio input Phono jacks/stereo mini jack
Dimensions Approx. 152 x 40 x 72mm

Mass Approx. 85g (3.0oz.)

Design and specifications are subject to change without notice.

Left 2.3MHz

power adaptor for use on the following voltages:

Operating voltage

120V AC,60Hz

(6 x 1 1/2 x 2 3/4in.) (w/h/d)

regulated dc
power suppluy
9 Vdc

[TX BOARD]

TP

(CL4)

TP

(CL54)

(Component side)

MICROFILM

INFRARED TRANSMITTER

RV2

RV1

(R-ch)

(L-ch)

Oscillating frequency

adjustment

– 2 –