SRS-RF90R, SRS-RF90RK, TMR-RF90 - Sony Audio Service Manual (repair manual)

Model
SRS-RF90R SRS-RF90RK TMR-RF90
Pages
28
Size
5.31 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srs-rf90r-srs-rf90rk-tmr-rf90.pdf
Date

View Sony SRS-RF90R / SRS-RF90RK / TMR-RF90 Service Manual online

Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-873-530-01
2002B1600-1
© 2002.02
SRS-RF90R/RF90RK/
TMR-RF90
US Model
Canadian Model
SERVICE MANUAL
WIRELESS STEREO SPEAKER SYSTEM
SPECIFICATIONS
Ver 1.0  2002. 02
General
Carrier frequency 913.5 – 914.5 MHz
Channel
Ch1, Ch2, Ch3
Modulation
FM stereo
Transmitter (SRS-RF90RK only)
Power source
DC 9 V: supplied AC power adaptor
(AC-S901)
Audio input
phono jacks/stereo mini jack
Input impedance 33 k
Ω/51 Ω switchable
Dimensions
Approx. 136 
× 136 × 100 mm
(6 
× 6 × 4 
1
/
3
 in.) (w/h/d)
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
woofer: 57 mm 
× 1
Power source
DC 9 V: supplied AC adaptor (AC-S906T)
Rated output
Built in amplifiers total 4W (while
using the supplied AC adaptor)
* power output:
Tweeter: 0.25W + 0.25W < 10%
T.H.D., 5 kHz 24 ohms
Woofer: 3.5W < 10% T.H.D., 1kHz
6 ohms
Dimensions
Approx. 234 
× 300 × 126 mm
( 9 
1
/
4
 
×  11 
7
/
8
 
× 5 in.) (w/h/d)
Mass
Approx. 905 g (31.9 oz.) incl.
built-in rechargeable battery
Built-in Ni-Cd rechargeable battery
Voltage
7.2 V
Capacity
700 mAh
Duration time
Approx. 4 hours
(with the 10 mW reflector light OFF)
Charging time
Approx. 28 hours (from fully
discharged to fully charged)
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.
SRS-RF90RK
Wireless Active Speaker
SRS-RF90R
RF Transmitter
TMR-RF90
• SRS-RF90RK is composed of following models.
COMPONENT MODEL NAME
SRS-RF90R
TMR-RF90
• SRS-RF90R is sold as single model too.
2
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
3
SRS-RF90R/RF90RK/TMR-RF90
SERVICING  NOTE
Note : In the place of a          mark, as shown in figure, the wires are taken about.
( Rear side )
tape
cushion
cushion
( Front side )
Leading about of wiring
4
SRS-RF90R/RF90RK/TMR-RF90
SECTION 1
GENERAL
This section is extracted from
instruction manual.
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.
1 2 3
CHANNEL
1
Connect the speaker system to a power
source.
AC power adaptor (supplied)
Tweeter
(left)
Tweeter
(right)
To an AC
outlet
OFF y ON
The switch of the
reflector light
POWER switch
POWER indicator
High
Low
TUNING
button
VOLUME control
2
The CHARGE indicator on the speaker
system will light up to indicate that the
battery is being charged.
CHARGE indicator
A
To connect to a LINE OUT or REC OUT
B
To connect to headphones jack
DC IN 9V
OFF
ON
FILTER
NOISE
1 2 3
CHANNEL
R
B
A
L
AUDIO IN
Transmitter
to AUDIO IN
B jack
Connecting cord
(supplied)
Right channel
(red)
Left channel
(white)
to LINE OUT or REC
OUT jacks
Stereo system, VCR, etc.
DC IN 9V
OFF
ON
FILTER
NOISE
1 2 3
CHANNEL
R
B
A
L
AUDIO IN
Transmitter
Left channel
(white)
Right channel
(red)
Connecting cord
(supplied)
to AUDIO IN
A jacks
Unimatch plug
adaptor (not
supplied)
Discman, MD,
WALKMAN*, VCR,
etc.
to headphones
or LINE OUT jack
(stereo mini jack)
to headphones
jack (stereo
phone jack)
SRS-RF90R
TMR-RF90
5
SRS-RF90R/RF90RK/TMR-RF90
SECTION  2
DISASSEMBLY
Note :
Disassemble the unit in the order as shown below.
2-1. Grille Bracket
Note :
This set can be disassembled in the order shown below.
FRONT CABINET SECTION,
REAR CABINET SECTION
(Page 6)
GRILLE BRACKET
(Page 5)
SET(SRS-RF90R)
NICKEL CADMIUM BATTERY,
SPEAKER(057F022)
(Page 6)
CABINET(TOP SECTION),
JACK BOARD, RX BOARD
(Page 7)
AMP BOARD,
MEGABASS BOARD,
REFRECTOR BOARD
(Page 8)
CHARGE BOARD,
SW BOARD,
(Page 7)
DRIVE(030F034)
(Page 8)
2
jack holder
4
grille bracket
    (Cautions)
(Cautions)
Please also exchange grille (Dia. 57) together at a Grille bracket.
(A grille (Dia. 57) is unreproducible.)
    
3
grille (Dia. 57)
    (Cautions)
1
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).
6
SRS-RF90R/RF90RK/TMR-RF90
2-2. Front Cabinet Section, Rear Cabinet Section
2-3. Nickel Cadmium Battery, Speaker (057F022)
6
eight
 screws
     (+BVTP 3
 
×
 12)
2
three
 screws
     (+P 3
 
×
 10)
4
two
 screws
     (+P 3
 
×
 10)
1
reflector
8
connector
     (CN203)
7
connector
     (CN802)
3
jack holder
5
stand
rear cabinet section
9
front cabinet section
2
two claws
4
nickel. cadmium battery
3
retainer board
1
screws
     (+BVTP 3
 
×
 10)
5
two screws
     (+BVTP 3
 
×
 10)
6
speaker (057F022)
front cabinet
7
SRS-RF90R/RF90RK/TMR-RF90
2-4. Cabinet (Top Section), JACK board, RX 
b
oard
2-5. CHARGE board, SW board
1
connector (CN302)
7
connector (CN801)
8
connector
     (CN804)
qa
connector
     (CN101)
qs
antenna
qd
RX board
4
connector (CN304)
6
cabinet
     (top section)
2
connector
     (CN301)
3
power button
q;
JACK board
5
two
 screws
     (+BVTP 3
 
×
 10)
9
screw (DIA. 12)
   
rear cabinet
3
CHARGE board
5
SW board
2
connector (CN303)
1
screw
     (+P 2.6
 
×
 4)
4
two screws
     (+P 2.6
 
×
 6)
top cover section
8
SRS-RF90R/RF90RK/TMR-RF90
2-6. AMP board, MEGABASS board, REFLECTOR board
2-7. Drive (030F034)
6
AMP board
8
MEGABASS board
7
Remove eight solderings.
2
connector (CN202)
9
connector (CN304)
5
connector (CNP201)
4
connector (CNP202)
qa
REFLECTOR board
3
screw
     (+P 2.6
 
×
 6)
q;
screw
     (+P 2.6
 
×
 6)
1
power button
1
screw
     (+BVTP 3
 
×
 10)
8
screw
     (+BVTP 3
 
×
 10)
2
screw
     (+P 2.6
 
×
 6)
9
screw
     (+P 2.6
 
×
 6)
3
Remove two solderings.
4
herness
qa
herness
6
MDD holder (R)
qd
MDD holder (L)
7
drive (030F034)
qf
drive (030F034)
5
grille (DIA. 30)
qs
grille (DIA. 30)
q;
Remove the soldering.
When you remove a Cautions : (R) side, please start with 
1
, when you remove the (L) side, please start with 
8
.
9
SRS-RF90R/RF90RK/TMR-RF90
SECTION 3
ELECTRICAL ADJUSTMENTS
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
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.
Setting :
AF signal 
generator 
Telescopic
antenna
8 cm
L-CH (J402)
TMR-RF90
set 
TMR-RF90
set 
Frequency counter 
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 :
(Component side)
S402
Hole
J402
(L-CH) (R-CH)
CH3 
CH2 
CH1
RV403: Modulation adjustment
Trimmer : Transmission 
 frequency adjustment
VCO UNIT
RV403
IC402
digtal voltmeter
(AC range)
 (Conductor side)
TX BOARD
TX BOARD
TMR-RF90
10
SRS-RF90R/RF90RK/TMR-RF90
Notes:
1. Use transmitter with check and adjustment already completed.
2. On adjusting the speaker section, use the transmitter as a
jig.
Wireless Active Speaker : SRS-RF90R
Transmitter
: TMR-RF90
Procedure:
1. Connect an oscillator with attenuator and terminator (600 
Ω)
to the transmitter AUDIO IN-A connector (J402).
2. Connect an AC adapter to the transmitter DC IN 9V jack (J404).
3. Short between Q101 corrector and GND on the RX board.
4. Connect an AC adapter to the speaker DC IN 9V jack (J801).
5. Connect lead wires to IC101 pin 4, pin 6, pin 7 and GND on
the RX board.
6. Connect a resistor 33k 
Ω between IC101 pin 4 and pin 7.
7. Connect lead wires to the speakers’ terminals (L+,L-,R+,R-)
on the AMP board.
Free Run Frequency Check and Adjustment
1. Set the transmitter AUDIO IN-A connector (J402) to no signal.
Note: In this case, operation time is about 5 or 10 minutes.
     Perform confirmation for less than 5 minutes.
2. Check the transmitter power indicator D401 (red) lights.
3. Set the transmitter  CHANNEL  switch to 1.
4. Connect DC 1.2V across TP102 and GND on the RX board.
5. Connect a frequency counter to IC101 pin 4 and GND on the
RX board, then confirm the frequency within 76kHz
± 50Hz
6. When the frequency dose not satisfy the specified value, adjust
the value of the frequency counter to specification by RV101
on the RX board.
Specified values: 76kHz ± 50Hz.
7. Remove a 33 k
Ω resister between IC101 pin 4 and pin 7.
Setting :
Receiving Frequency Check and Adjustment
1. Set the transmitter  CHANNEL  switch to 2.
2. Set the transmitter  NOISE FILTER  switch to off.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-
A(L-ch) connector only.
4. Keep distance between transmitter and speaker to 5 meters over.
5. Set the speaker volume (RV301) to minimum.
6. Connect DC1.2V across TP102 and GND.
7. Connect an oscilloscope CH1 and CH2 to IC101 pin 6 and pin 4.
8. Check the waveform of the oscilloscope to CH1 is demodulated
1kHz signal and CH2 is GND.
9. If CH1 and CH2 are not satisfied in step 8, adjust the coil (L101)
on the RX board to satisfied step 8.
10. Disconnect DC1.2V across TP102 and GND.
11. Open between Q101 corrector and GND on the RX board.
12. Switch the transmitter off and push the  TUNE  switch (S301).
Check the waveform of the oscilloscope at the TP102 as follows:
13. Switch on the transmitter again.
14. Set the transmitter  CHANNEL  switch to 1.
15. Push the  TUNE  switch (S301) to receive radio frequency.
16. Check same step 8.
17. Set the transmitter  CHANNEL  switch to 3.
18. Push the  TUNE  switch (S301) to receive radio frequency.
19. Check same step 8.
Carrier Modulation Check
1. Set the transmitter  CHANNEL  switch to 2.
2. Set the transmitter  NOISE FILTER  switch to off.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Set the speaker volume (RV301) to minimum.
5. Connect an oscilloscope CH1 and CH2 to IC101 pin 6 and pin 4.
6. Push the  TUNE  switch (S301) to receive radio frequency.
7. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
8. Connect an AC voltmeter with LPF to IC101 pin 6 and GND.
9. Check the value of the AC voltmeter to 26mVrms ± 2mV
Setting :
Separation Check
1. Set the transmitter  CHANNEL  switch to 2.
2. Set the transmitter  NOISE FILTER  switch to off.
3. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(L-ch) connector only.
4. Connect an oscilloscope CH1 to speakers terminal (L+,L-) and
CH2 to IC101 pin 4 and GND.
5. Push the  TUNE  switch (S301) to receive radio frequency.
6. Check the waveform of the oscilloscope that the CH1 is
demodulated 1kHz signal and CH2 is GND.
7. Connect an AC voltmeter with LPF to speakers terminal
(L+,L-).
8. Adjust the value of the AC voltmeter to specification by
speaker volume RV301.
Specified values: 155mVrms
9. Connect an AC voltmeter with LPF to speakers terminal
(R+,R-).
10. Measure the value of the AC voltmeter.
11. Check the difference of the L and R to more than 20dB.
12. Input a signal of 1kHz, 316mVrms to transmitter AUDIO IN-A
(R-ch) connector only.
13. Connect an AC voltmeter with LPF to speakers terminal
(R+,R-).
14. Adjust the value of the AC voltmeter to specification by
speaker volume RV301.
Specified values: 155mVrms
15. Connect an AC voltmeter with LPF to speakers terminal
(L+,L-).
16. Measure the value of the AC voltmeter.
Setting :
+
regulated power supply
(DC 1.2V)
TP102
IC101 pin4
frequency counter
+
GND
1.8V
2-3sec
0.6V
Waveform of 
auto-tuning 
voltage at 
the TP102
+
regulated power supply
(DC 1.2V) (from step 6 to step 9)
TP102
+
+
IC101 pin6
IC101 pin4
oscilloscope
(step 8, step 16, step 19)
CH1
CH2
SRS-RF90R
Setting :
+
TP102
oscilloscope
CH1
+
digital voltmeter
(AC range)
LPF
IC101
pin6
33000P
2.2K
+
+
IC101 
pin6
IC101 
pin4
oscilloscope
CH1
CH2

Download Sony SRS-RF90R / SRS-RF90RK / TMR-RF90 Service Manual (Repair Manual)

Here you can view online and download Sony SRS-RF90R / SRS-RF90RK / TMR-RF90 Service Manual in PDF. SRS-RF90R / SRS-RF90RK / TMR-RF90 service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony SRS-RF90R / SRS-RF90RK / TMR-RF90 Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.