Sony TMRRF-90 Service manual

SRS-RF90R/RF90RK/

TMR-RF90

SERVICE MANUAL

Ver 1.0 2002. 02

SRS-RF90R TMR-RF90

• SRS-RF90RK is composed of following models.

COMPONENT MODEL NAME

SRS-RF90RK

Wireless Active Speaker SRS-RF90R

RF Transmitter TMR-RF90

• SRS-RF90R is sold as single model too.

SPECIFICATIONS

General

Carrier frequency Channel Ch1, Ch2, Ch3 Modulation FM stereo

Transmitter (SRS-RF90RK only)

Power source DC 9 V: supplied AC power adaptor

Audio input phono jacks/stereo mini jack Input impedance 33 kΩ/51 Ω switchable Dimensions Approx. 136 × 136 × 100 mm

Mass Approx. 146 g (5.2 oz.)

Speaker system SRS-RF90RK, SRS-RF90R

Speaker system 2 way magnetically shielded Enclosure type Bass reflex Speaker units tweeter: 30 mm × 2

Power source DC 9 V: supplied AC adaptor (AC-S906T) Rated output Built in amplifiers total 4W (while

Dimensions Approx. 234 × 300 × 126 mm

Mass Approx. 905 g (31.9 oz.) incl.

913.5 – 914.5 MHz

(AC-S901)

(6 × 6 × 4

woofer: 57 mm × 1

using the supplied AC adaptor) * power output:

( 9

built-in rechargeable battery

/3 in.) (w/h/d)

Tweeter: 0.25W + 0.25W < 10% T.H.D., 5 kHz 24 ohms

Woofer: 3.5W < 10% T.H.D., 1kHz

6 ohms

/4 × 11 7/8 × 5 in.) (w/h/d)

US Model

Canadian Model

Built-in Ni-Cd rechargeable battery

Voltage 7.2 V Capacity 700 mAh Duration time Approx. 4 hours

Charging time Approx. 28 hours (from fully

Supplied accessory

The transmitter (SRS-RF90RK only) AC adaptor (2 for SRS-RF90RK) (1 for SRS-RF90R) Connecting cord phono plug-stereo miniplug (1m) (1) Operating instructions (1)

Design and specifications are subject to change without notice.

(with the 10 mW reflector light OFF)

discharged to fully charged)

9-873-530-01

2002B1600-1

WIRELESS STEREO SPEAKER SYSTEM

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

SRS-RF90R/RF90RK/TMR-RF90

TABLE OF CONTENTS

1. GENERAL

·········································································· 4

2. DISASSEMBLY

2-1. Grille bracket ································································· 5 2-2. Front cabinet section, Rear cabinet section ··················· 6 2-3. Nickel cadmium battery, Speaker (057F022) ················ 6 2-4. Cabinet (Top section), JACK Board, RX board ············ 7 2-5. CHARGE board, SW board ·········································· 7 2-6. AMP board, MEGABASS board,

REFLECTOR board ······················································ 8

2-7. Drive (030F034) ···························································· 8

3. ELECTRICAL ADJUSTMENTS ································· 9

4. DIAGRAMS······································································ 12

4-1. Block Diagrams

– SRS-RF90R – ··························································· 13 – TMR-RF90 – ···························································· 14

4-2. Printed Wiring Boards (SRS-RF90R)

– RX Bord Section – ··················································· 15

4-3. Schematic Diagram (SRS-RF90R)

– RX Bord Section – ··················································· 16

4-4. Printed Wiring Boards (SRS-RF90R)

– AMP Bord Section – ················································ 17

4-5. Schematic Diagram (SRS-RF90R)

– AMP Bord Section – ················································ 18 4-6. Printed Wiring Board (TMR-RF90) ···························· 19 4-7. Schematic Diagram (TMR-RF90) ······························· 20

5. EXPLODED VIEWS

5-1. Front Cabinet Section (SRS-RF90R) ·························· 21 5-2. Rear Cabinet Section (SRS-RF90R) ··························· 22 5-3. TMR-RF90 ·································································· 23

6. ELECTRICAL PARTS LIST ······································· 24

Leading about of wiring

( Front side )

SRS-RF90R/RF90RK/TMR-RF90

SERVICING NOTE

( Rear side )

cushion

tape

cushion

Note : In the place of a mark, as shown in figure, the wires are taken about.

SRS-RF90R/RF90RK/TMR-RF90

SRS-RF90R

SECTION 1

GENERAL

This section is extracted from instruction manual.

1 Connect the speaker system to a power

source.

Tweeter (right)

Tweeter (left)

AC power adaptor (supplied)

To an AC outlet

2 The CHARGE indicator on the speaker

system will light up to indicate that the battery is being charged.

CHARGE indicator

TUNING button

POWER switch

OFF y ON

POWER indicator

The switch of the reflector light

High

VOLUME control

Low

1 First turn on the audio/video equipment

and start playing. The power indicator of the transmitter will light up.

2 Turn on the speaker system.

The power indicator of the speaker system will light in red.

3 Select the radio frequency with the

CHANNEL selector.

123

CHANNEL

TMR-RF90

A To connect to a LINE OUT or REC OUT B To connect to headphones jack

Transmitter

to AUDIO IN B jack

Left channel (white)

OFF ON

FILTERNOISE

DC IN 9V

RBAL

AUDIO IN

Connecting cord (supplied)

Right channel (red)

to LINE OUT or REC OUT jacks

Stereo system, VCR, etc.

123

CHANNEL

Transmitter

OFF ON

FILTERNOISE

Right channel (red)

Connecting cord (supplied)

Unimatch plug adaptor (not supplied)

to headphones jack (stereo phone jack)

RBAL

AUDIO IN

to AUDIO IN A jacks

DC IN 9V

Left channel (white)

to headphones or LINE OUT jack (stereo mini jack)

Discman, MD, WALKMAN*, VCR, etc.

123

CHANNEL

DISASSEMBLY

jack

holder

grille bracket

(Cautions)

(Cautions) Please also exchange grille (Dia. 57) together at a Grille bracket. (A grille (Dia. 57) is unreproducible.)

grille (Dia. 57)

(Cautions)

three screws

(+P 3

10)

The cautions at the time of attachment : When you attach a grille (Dia. 57), please unite a position by cut of a grille (Dia. 57).

Note : Disassemble the unit in the order as shown below.

SET(SRS-RF90R)

SRS-RF90R/RF90RK/TMR-RF90

SECTION 2

GRILLE BRACKET

(Page 5)

NICKEL CADMIUM BATTERY,

SPEAKER(057F022)

(Page 6)

FRONT CABINET SECTION,

REAR CABINET SECTION

CABINET(TOP SECTION), JACK BOARD, RX BOARD

CHARGE BOARD,

SW BOARD,

Note : This set can be disassembled in the order shown below.

2-1. Grille Bracket

(Page 6)

(Page 7)

AMP BOARD,

MEGABASS BOARD,

REFRECTOR BOARD

(Page 8)

DRIVE(030F034)

(Page 8)

SRS-RF90R/RF90RK/TMR-RF90

2-2. Front Cabinet Section, Rear Cabinet Section

front cabinet section

stand

connector

(CN203)

rear cabinet section

eight screws

(+BVTP 3

reflector

12)

two screws

(+P 3

10)

2-3. Nickel Cadmium Battery, Speaker (057F022)

retainer board

nickel. cadmium battery

connector

(CN802)

jack holder

screws

(+BVTP 3

wo screws

(+BVTP 3

three screws

(+P 3

10)

speaker (057F022)

two claws

front cabinet

2-4. Cabinet (Top Section), JACK board, RX board

)

(+BVTP 3

power button

cabinet

(top section)

connector (CN801)

two screws

10)

connector (CN302)

connector

(CN301)

SRS-RF90R/RF90RK/TMR-RF90

screw (DIA. 12)

JACK board

connector

(CN804)

connector

(CN101)

connector (CN304)

2-5. CHARGE board, SW board

CHARGE board

screw

(+P 2.6

rear cabinet

connector (CN303

antenna

RX boar

two screws

(+P 2.6

top cover section

SW board

SRS-RF90R/RF90RK/TMR-RF90

)

2-6. AMP board, MEGABASS board, REFLECTOR board

Remove eight solderings.

MEGABASS board

connector (CN304)

connector (CN202)

power button

screw

(+P 2.6

AMP board

screw

(+P 2.6

REFLECTOR board

connector (CNP201

2-7. Drive (030F034)

screw

(+BVTP 3

10)

screw

(+P 2.6

screw

(+BVTP 3

screw

(+P 2.6

10)

Remove two solderings.

herness

drive (030F034)

grille (DIA. 30)

connector (CNP202)

herness

MDD holder (R)

drive (030F034)

MDD holder (L)

Remove the soldering.

grille (DIA. 30)

When you remove a Cautions : (R) side, please start with

, when you remove the (L) side, please start with 8.

digtal voltmeter

(AC range)

TMR-RF90

SRS-RF90R/RF90RK/TMR-RF90

SECTION 3

ELECTRICAL ADJUSTMENTS

Setting :

AF signal generator

set

TMR-RF90

L-CH (J402)

Telescopic antenna

Frequency counter

8 cm

set

TMR-RF90

Transmission Frequency Check and Adjustment

1. Set the NOISE FILTER switch to off.

2. Input a signal of 1 kHz 40 mVrms to only the L-CH (J402).

3. Connect a telescopic antenna to the frequency counter input and extend the antenna to a length of approximately 8 cm.

4. Place TX board close to the frequency counter, then measure the frequencies of CH1, CH2 and CH3 and make sure the values are as follows:

CH1 : 913.5 MHz ± 200 kHz CH2 : 914.0 MHz ± 200 kHz CH3 : 914.5 MHz ± 200 kHz

Modulation Check and Adjustment

1. Set the channel to CH2.

2. An electric wave is output for 5or 10 minutes when off to on a power supply (Power indicator will on).

3. Measure the center terminal of RV403 using an digital volt-meter (AC range) and make sure the value is 2 to 2.5mVrms. If the measured value is other than the specified value, adjust to 2 to 2.5mVrms by turning the RV403 on the TX board.

Connection points and Adjustment Location :

TX BOARD

←

CH2 ←CH1

CH3

S402

RV403

(Component side)

(L-CH) (R-CH)

J402

VCO UNIT

Hole

When the frequency is not satisfied the specified value, set the CHANNEL switch (S402) to CH2, then adjust the value of the frequency counter to 914.0 MHz by trimmer capacitor in the VCO unit.

Standard value :913.9MHz to 914.1MHz

When completed with replacement, recheck the frequencies of CH1, CH2 and CH3.

RV403: Modulation adjustment

TX BOARD

Trimmer : Transmission

frequency adjustmen

(Conductor side)

IC402

+ 21 hidden pages