Sony TMR-RF960R User manual

TMR-RF960R
US Model
Canadian Model
SERVICE MANUAL
TRANSMITTER
Sony Corporation
Personal Audio Company
Published by Sony Engineering Corporation
9-877-526-01
2004B02-1
© 2004.02
SPECIFICATIONS
Ver 1.0 2004. 02
TMR-RF960R is the component model block one in the MDR-RF960RK
or MDR-RF920RK.
MDR-RF920RK MDR-RF960RK
Wireless Stereo Headphones MDR-RF920R MDR-RF960R
Transmitter TMR-RF960R TMR-RF960R
COMPONENT MODEL NAME FOR MDR-RF920RK/
MDR-RF960RK
General
Carrier frequency 913.5 – 914.5 MHz
Channel Ch1, Ch2, Ch3
Modulation FM stereo
Frequency response MDR-RF920R : 20 – 20,000 Hz
MDR-RF960R : 10 – 22,000 Hz
Transmitter
Power source DC 9 V: supplied AC power adaptor
Audio input phono jacks/stereo mini jack
Dimensions Approx. 133 x 124 x 136 mm
(5 1/4x 5 x 5 3/8in.)
(w/h/d)
Mass Approx. 195 g (7 oz.)

2
TMR-RF960R SECTION 1
GENERAL
1. Check the area of your repair for unsoldered or poorly-sol
deredconnections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are
“pinched” or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair.
Point them out to the customer and recommend their
replacement.
4. Lookforpartswhich, throughfunctioning, showobvious signs
of deterioration. Point them out to the customer and
recommend their replacement.
SAFETY CHECK-OUT
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
• Keep the temperature of the 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
TABLE OF CONTENTS
Specifications ............................................................................ 1
1. GENERAL ................................................................... 2
2. DISASSEMBLY
2-1. Upper Cabinet Assy ............................................... 3
2-2. TX-BASE Board .................................................... 3
3. ELECTRICAL ADJUSTMENTS .......................... 4
4. DIAGRAMS
4-1. Block Diagrams...................................................... 5
4-2. Schematic Diagram – TX-BASE Board – ............. 6
4-3. Printed Wiring Board – TX-BASE Board –........... 7
4-4. Schematic Diagram – TX-VCO Board – ............... 8
4-5. Printed Wiring Board – TX-VCO Board – ............ 8
5. EXPLODEDVIEWS .................................................. 10
6. ELECTRICAL PARTS LIST...............................11
This section is extracted
from instruction manual.
INPUT
A
INPUT
DC IN 9V
!
L
R
B
NOISE FILTER
ON
OFF
CHANNEL 1
2
3
Setting up the
transmitter
1 Connect the transmitter to audio/
video equipment.
Select one of the hookups below
depending on the jack type:
ATo connect to a headphones jack
Transmitter
WALKMAN*,
TV, VCR, etc.
to INPUT B
jacks
Unimatch plug
adaptor
(supplied)
to headphones
jack (stereo
phone jack)
Connecting cord
(supplied)
to headphones
jack (stereo
mini jack)
Left channel
(white)
Right channel
(red)
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.

3
TMR-RF960R
SECTION 2
DISASSEMBLY
2-2. TX-BASE BOARD
• This set can be disassembled in the order shown below.
2-1. UPPER CABINET ASSY
1 protection sheet
5 upper cabinet ass
y
2 screw (DIA. 2)
3 four screws (DIA. 2)
4
cabinet (lower) assy
1 two screws (DIA. 2)
3 TX-BASE board
2
cabinet (lower) assy

4
TMR-RF960R SECTION 3
ELECTRICAL ADJUSTMENTS
Setting :
AF signal
generator
Telescopic
antenna
8 cm
L-CH (J402)
TMR-RF960R
set
TMR-RF960R
set
Frequency counter
Transmission Frequency Check
1. Set the noise filter SW 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-BASE 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
channelswitch (S402)to CH2,then adjustthe valueof thefrequency
counter to 914.0 MHz by CT501 in the TX-VCO BLOCK.
Standard value :913.9MHz to 914.1MHz
When completedwithreplacement, recheckthe frequenciesof CH1,
CH2 and CH3.
Charge Current Check
1. Connect the ammmeter 3and #probes to TP8 and 9.
2. The green LED (on charging) turns on.
Make sure the reading on the current meter becomes to the
standard value.
Standard value: 45±5mA
TP8 TP9
CURRENT METER
3
#
TX-BASE BOARD (Conductor side)
Pilot signal Modulation Check and Adjustment
1. Set the channel to CH2.
2. An electric wave is output for 5 or 10 minutes when OFF to
ON a power supply (LED (POWER) will ON).
3. Measure the center terminal of RV401 using an digital volt-
meter (AC range) and make sure the value is 2.65 to
2.75mVrms.
If the measured value is other than the specified value, adjust
to 2.65 to 2.75mVrms by turning the RV401 on the TX-BASE
board.
Connection points and Adjustment Location :
RV401
TX-VCO BLOCK
(R-CH) (L-CH) CHANNNEL
3CH-2CH-1CH
RV401: Modulation adjustment
CT501:Transmission
frequency adjustment
TX-BASE BOARD (Component side)
S402S401
J402
8
321
R468 R466
C488
C455
C454
C457
R469
R460
R464
R402
C480 R405
R472
IC404
IC403
C408
D403
X401
C458
RV401
JW416
JW401
IC402
Q404
C450
1-861-437-
digtal voltmeter
(AC range)
TX-BASE BOARD (Conductor side)

TMR-RF960R
55
4-1. BLOCK DIAGRAM
J401
S401
NOISE FILTER
COMPARATOR
(POWER ON/OFF)
ALC
AMP
CH2
AMP BUFFER
AMP
Q401
RECT
D404,405
INPUT
DET
DIVIDER
(19K)
BUFFER
OSC
AMP
TIME
DEVISION
MPX
J402
OFF
ON
L
R R-CH
R-CH
R-CH
14 9
8
76
CH1
AMP
1
X401
38kHz
RV401
IC401
LPF
Q408
IC403
STEREO MPX
+5V
REG
SWITCH
Q404
IC402
ANT401
D401
D402
(POWER)
(CHARGE)
INPUT
B
A
TX-BASE BOARD
MOD
IN ANT
5V
B+
5V
TX-VCO BLOCK
IO
V
PILOT SIGNAL
MODULATION
REGULATOR
&
RIPPLE
FILTER
Q402
Q406,407
CHARGE
DET
S402
CHANNEL
1
2
B+
5V
3
BATTERY
CHARGE
TERMINAL
(TO MDR-RF920R/RF960R)
+
–
J403
DC IN 9V
CHARGE
CURRENT
LIMIT
Q405,410
1
13
R-CH
+
31
20
17
16
18
12
1
Q403
COMPENSATION
MODULATOR
Q501,502
RF AMP
Q503
X501
1080MHz
57
IC405(2/2)
IC405(1/2)
SYSTEM
CONTROL
IC404
D407
CT501
TRANSMISSION
FREQUENCY
CT501
•R-ch is omitted due to same as L-ch
•Signal path.
L: AUDIO
F: FM
SECTION 4
DIAGRAMS

TMR-RF960R
66
4-2. SCHEMATIC DIAGRAM –TX-BASE BAORD –
J403
D404
X401
C455
C454
C453
R489
C462
R477
R476
R475
R479
C475
C401
R459
R458
R457
R456
R450
C442 C433
R443
R444
C432
R445
C434
C435 R470
C444
C443
R471 C445
R488
R487
C449
R436
R435
R449
R448
R447
R446
R460
C458 R469
C457
R482
JW411
JW418 JW412
R474
R491
JC403
R490
JW406
R441
R442
JW413
D410 C476
R486
R483
C474
R480 R481
C477
R484
R485
Q407
Q406
R492
Q405
R498
Q410
R499
D407
C482
R496
R494
R497
R495
R493
D409
JW415
JW414
JW405
C466
C427
R431
R432
C428
R433
C430
C429 C412
D405
C411
R438 C440 R461 R452
R434
R455
R454
R453
R463
C439
R451
JW402
JC413
R437
JC414
Q402
Q403
Q404
C470
C468
JW401
Q408
Q401
R462
R440
C465
R468
R467
C488
R473
R466
JC405
C406
R426
R427
C407
R425
R428
C422
C423
C441
C421
JW417
R424
C431
R429
R423
C417
R421
R422
C416
JW409
R403
R413
S401
R411 R408
R418
R401
JW408
C413
C403
R417
R407
R416
R404
R406
R414
JW404
L410
C490
C489
JC404
C446
C437
R430
C426
C425
JW410
JW407
R464 JW403
JC402
C484
C481
RV401
ANT401
D401
J402
J401
S402
D403
C480
C450
IC401
IC402
IC405
R478
R472
IC403
C408 R405
R402
D402
IC404
Q409
JW416
TP8
TP9
1SS133T
38kHz
10p
100p
10
50V
22k
100p
1.2k
1.2k
2.2k
47k
220
16V
0.1
100
4.7k
5.6k
1.5k
100k
0.0022 0.1
10k
10k
0.0022 100k
0.01
680p 1k
680p
0.01
1k 0.1
1k
4.7k
0.1
1k
4.7k
100
4.7k
5.6k
1.5k
5.6k
10
50V
120k
330p
22k
0
00
22k
10k
0
680
0
220
680
0
MTZJ4.3B-T77 220
16V
22k
22k
33p
15k 22k
1
22k
22k
DTC144EKA
DTA144VKA
47k
2SB1424
22k
DTC144EKA
4.7k
1SS133T
0.1
470
560
560
470
560
MTZJ-T-77-5.6B
0
0
0
0.01
0.01
4.7k
2.2M
100p
22k
4.7
50V
100p 100p
1SS133T
100p
220k
10
50V 56k 150k
220k
68k
100k
100k
33k
0.1
100k
0
0
22k
0
2SC2412K
REGULATOR
&
RIPPLE
FILTER
DTA124KA
COMPENSATION
KTA1266GA
SWITCH
33
50V
0.1
0
2SC2412K
LPF
2SC2712L
AMP
1M
1k
0.001
18k
4.7k
0.01
1.2k
22k
0
0.022
3.3k
220
2.2
50V
100k
680
220
16V
100p
10
50V
22
50V
0
3.3M
10
50V
10k
220
2.2
50V
100k
3.3k
0.022
0
51
51
33k 2.2k
2.2k
33k
0
0.001
0.001
1k
1k
33k
33k
33k
33k
0
AIR 1.5T
5p
1p
0
1
50V
1
50V
10k
0.01
0.022
0
0
1k 0
0
10p
33p
4.7k
SLR342VC3F
10EDB40
0.01
2.2
50V
BA3308F-E2
ALC AMP
KIA78S05P-TP
+5V REG.
BA10393F-E2
18k
10
NJM2035M(TE2)
STEREO MPX
1470
470
SLR342MC3F
M34580M2
-084FP-T3
2SC2412K
LPF
0
ON
OFF
CHARGE
TERMINAL
DC IN 9V
SYSTEM
CONTROL
INPUT DET,
COMPARATOR
CHANNEL
PILOT SIGNAL
MODULATION
(TO MDR-RF920R
/MDR-RF960R)
BATTERY
5V
ANT
SIG
RV401
8

TMR-RF960R
77
4-3. PRINTED WIRING BOARD –TX-BASE BAORD –
L
R
ANT401
R407
R418
C403
C413
R413
R452
R451
R403
C468
321
R455
JC402
R468 R466
C488
R486
R485
R484
R434
C455
C454
C462
R416
C457
R469
R460
R464
R483
R481
R480
C477
C474
R450
R448
R458
R449
R443
R445
R459
R457
R456
R444
C433
C442
C432
R446
R447
R470
R493
R473
R442
R498
R441
R490
Q408
R494
R495
R496
R497
Q405
Q406
Q407
R492
R491
R406
R499
R417
C481
TP8 TP9
C482
Q410
R474
R404
R402
R414
R489
R411
R401
R488 R487
C480
R408
R437
C466
R436
R435
C401
R427
C423
R421
R423
IC401
R424
R425
R422
R426
C406
C416
C429
R462
R405
Q401
C444
R472
Q409
C443
C412
C435
R453
R454
R471
C465
IC405
R467
R463
C427
R431
R429
R432
C426
JC403
R433
IC404
R461
R430
Q402
R438
R428
C411
C425
IC403
R440
C439
C445
C434
C449
C428
C408
R479
Q403
R476
R477 R478
R475
JC405
JC413
JC414
R482
JC404
C489
C490
C484
D403
S402 S402
X401
C453
J403
C458
C422
JW409
JW404
RV401
JW413
D410
JW411
C475
C470
D401
D402
D407
D409
JW406
S401
S401
J401
J402
C437
JW414
JW416
JW401
JW410
JW417
C407
C441
JW407
JW408
C421
C431
C417
C476
JW415
IC402
C440
C430
JW405
Q404
JW412
D404
D405
C450
JW402 JW403
JW418
C446
A
B
CHANNEL
INPUT
NOISE FILTER
DC IN 9V
ON
OFF
t
3
2
t
1
t
POWER
CHG
E
E
E
E
EE
E
-1 -2
BOARDTX-BASE
11
(11)
1-861-437-
E
A
TX-VCO
BOARD
(Page 8)
ANT SIG
5V
L410
23 4 5 6 7 8
A
1
B
C
D
E
F
+- +-
BATTERY CHARGE TERMINAL
(TO MDR-RF920R/RF960R)
Ref. No. Location
D401 E-2
D402 E-1
D403 F-7
D404 C-4
D405 C-4
D407 F-3
D409 D-3
D410 C-3
IC401 A-6
IC402 F-5
IC403 E-6
IC404 E-5
IC405 C-5
Q401
Q402 E-3
Q403 C-4
Q404 F-6
Q405 F-2
Q406 F-2
Q407 D-3
Q408 D-6
Q409 C-6
Q410 E-3
• Semiconductor
Location

TMR-RF960R
88
4-4. SCHEMATIC DIAGRAM –TX-VCO BAORD –
C504
C505
C516
C520
C515
C510
C506 C507
D501
X501
L503
L501
L506
L505
L502
C508
C511
C522
C523
C521
C524
C514
C518
C512
CT501
C503
C509
C513
C501
C527
C526
C528
R504
R506
R505
R507
Q501
Q503
R503
Q502
R508
CN503
CN501
CN502
JC510
R512
R514
C525
R509
R511
R513
6p
5p
0.5p
1p
0.01
1p
3p 100p
1SV245
(TPH3)
1080MHz
AIR
7T
AIR
AIR
AIR
1.5p
5p
4p
2p
2p
5p
0.001
0.01
5p
5p
1.5p
0.001
3p
20p
2p
2p
0.001
33
6.8k
2.2k
470
2SC5084
MODULATOR
2SC5084
RF AMP
2.2k
2SC5084
MODULATOR
22k
1P
1P
1P
0
100
47
10
16V
47k
10
22
FREQUENCY
CT501
TRANSMISSION
SIG
5V
ANT
6
4-5. PRINTED WIRING BOARD –TX-VCO BAORD –
Q501
Q502
D501
R503
R504 R505
R506
R507
R509
R513
R508
C512
C511
C510
C513
C508
C509
C505
C504
C503
C507
C506
C515 L501
L506
L505
L503
L502
C514
JC510
C526
C527 C528
CT501
C525
R511
R512
Q503
R514
C501
C516
C520
C521
C522
C523
C524
C518
ANT SIG
A
TX-BASE
BOARD
(Page 7)
5V
11
(11)
1-861-440-
11
(11)
1-861-440-
(SIDE A)
BOARDTX-VCO
BOARDTX-VCO (SIDE B)
23
A
1
B
C
D
E
Note on PrintedWiring Boards:
•X: parts extracted from the component side.
•: Pattern from the side which enables seeing.
Note on Schematic Diagram:
•All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not
indicated except for electrolytics and tantalums.
•All resistors are in Ωand 1/4W or less unless otherwise specified.
•A: B+ Line.
•H: adjustment for repair.
•Power voltage is dc 9 V and fed with regulated dc power supply from external
power voltage jack.
•Voltages are dc with respect to ground under no-signal conditions.
•Voltages are taken with a VOM (Input impedance 10 MΩ).
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
•Circled numbers refer to waveforms.
•Signal path.
F: FM
L: AUDIO
Ref. No. Location
D501 E-2
Q501 D-2
Q502 D-2
Q503 B-1
• Semiconductor
Location

9
TMR-RF960R
•WAVEFORMS
IC403 7 CAPACITOR
VOL/DIV : 0.5 V AC
TIME/DIV : 10 µ sec
2IC403 8 PILOT OUTPUT
VOL/DIV : 0.5 V AC
TIME/DIV : 20 µ sec
1
2.0Vp-p
26
µ sec
0.6Vp-p
52
µ sec

10
TMR-RF960R
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
SECTION 5
EXPLODED VIEWS
NOTE:
•-XX, -X mean standardized parts, so they may
have some differences from the original one.
•Items marked “*” are not stocked since they
are seldom required for routine service. Some
delayshould be anticipated when ordering these
items.
•Themechanical parts with noreference number
in the exploded views are not supplied.
•Hardware (# mark) list and accessories are
given in the last of this parts list.
not supplied not supplied
not supplied
not supplie
d
not supplied
not supplied
1
6
7
8
8
2
3
5
4
*1A-4547-110-A TX-BASE BOARD, COMPLETE
(including TX-VCO BOARD)
23-246-378-02 TERMINAL (+), CHARGE
33-246-379-02 TERMINAL (-), CHARGE
43-246-372-01 BRACKET, JACK
5X-3384-856-1 CABINET ASSY, UPPER
63-246-376-31 CABINET (LOWER)
73-246-966-01 FOOT (BACK), RUBBER
84-984-729-01 FOOT, RUBBER