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MDR-RF830
SERVICE MANUAL
REVISED
Ver 1.2 1999. 09
AEP Model UK Model
MDR-RF830 is the component model block one in the MDR-RF830RK. COMPONENT MODEL NAME FOR MDR-RF830RK Wireless Stereo Headphones Transmitter MDR-RF830 TMR-RF830R
SPECIFICATIONS
Power source DC 3 V: 2 × R6 (size AA) battery or 2 × supplied NC-AA-HJ Ni-Cd rechargeable battery Approx. 215 g (7.6 oz.) incl. Ni-Cd batteries
Mass
Design and specifications are subject to change without notice.
WIRELESS STEREO HEADPHONES
MICROFILM
SECTION 1 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
1-1. RX BOARD, FE BOARD (R-CH)
3 Cover (R), hanger
7 FE board 8 Remove solder
1 Screws (+P2 × 12)
9 Screw (M1.7 × 4) 6 Remove solder 4 RX board 2 Screws (+P2 × 8) 5 Plate, RX shield !¡ SW1 0 Spacer
1-2. MDD02 (R-CH)
6 MDD02 (R-CH) 5 Screw (M1.7 × 4) 1 Pad, ear
2 Screw (+P2 × 8) 3 Holder, ball shaft 4 Housing (R) assy 7 Remove solder
--2--
1-3. CASE, BATTERY, MDD01 (L-CH)
2 Cover, battery
6 Case, battery
5 Screws (+P2 × 12)
3 Screws (+P2 × 8)
0 Housing (L) assy
4 Cover (L), hanger 7 Remove solder
!¡ Screw (M1.7 × 4)
1 Pad, ear
8 Screw (+P2 × 8) 9 Holder, ball shaft
!TM MDD01 (L-CH) !£ Remove solder
--3--
SECTION 2 ELECTRICAL ADJUSTMENTS
Notes: 1. Use transmitter with check and adjustment alreadycompleted. 2. The transmitter section adjustments should be completed before performing the headphones section adjustment. 3. On adjusting the headphones section, use the transmitter as a jig. Headphones MDR-RF830 Transmitter TMR-RF830R
Separation check and adjustment
1. Set the transmitter channel to CH2. 2. Set the transmitter noise filter SW to OFF . 3. Input a signal of 1kHz 316mVrms to onl y the transmitter LCH (J403). 4. Connect an digital voltmeter (AC range) and oscilloscope to the L-CH speaker outputs (both sides of MDD01). 5. Receive signals by turning the TUNING VOL (RV302). 6. Adjust the VOL (RV301) so that the RX board L-CH speaker outputs (both sides of MDD01) are 155mVrms. 7. Connect an digital voltmeter (AC range) and oscilloscope to the R-CH speaker outputs (both sides of MDD02) and measure the voltages. 8. At this time, check to make sure the level separation of L-CH and R-CH speaker outputs is more than 20dB. If the separation is less than 20dB, turn R V303 on the RX boar d so that the RCH output is minimal, then check to see if the level separation of L-CH and R-CH speaker outputs is more than 20dB. 9. Input a signal of 1kHz 316mVrms to only the transmitter R-CH (J402). 10. Adjust the VOL (RV301) so that the RX boar d R-CH speaker outputs (both sides of MDD02) are 155mVrms. 11. Connect an digital voltmeter (AC range) and oscilloscope to the L-CH speaker outputs (both sides of MDD01) and measure the voltages. 12. At this time, check to make sure the level separation of L-CH and R-CH speaker outputs is more than 20dB.
Procedure:
AF OSC L-CH (J403) 1kHz 316mVrms (7.8dB) Jig Transmitter 600 J404 power supply (DC 9V)
ATT
1. Feed a signal to jig (transmitter) and connect a power supply to DC IN 9V jack (J404).
Receive frequency check and adjustment
1. Set the transmitter channel to CH2. 2. Set the transmitter noise filter SW to OFF . 3. Input a signal of 1kHz 316mVrms to onl y the transmitter LCH (J403). 4. Place transmitter and headphones at a distance of more than 5m apart. 5. Set the VOL (RV301) to MIN. 6. Position RX board TUNING VOL (RV302) to the center . 7. Connect a digital voltmeter (DC range) and an oscilloscope between IC301 pin @¡ and GND. 8. First check to make sure that a demodulated waveform of 1kHz (appr oximately 13mVrms) is outputted to the oscilloscope , then check to make sure the DC voltmeter reading is DC 1 to 1.2V . 9. If a demodulated waveform of 1kHz is not outputted to the oscilloscope or if the DC level is not within the range specified above, adjust the RX board L301 so that a demodulated waveform of 1kHz is outputted to the oscilloscope and while the wave-form is outputted, further fine adjust the L301 so that the DC voltmeter reading is DC1.1V. 10. When completed, make sure signals can be received when switching the transmitter channel to CH1 or CH3 by turning RX board TUNING VOL (RV302).
Connection points and Adjustment Location: RX BOARD (See page 5)
Connection points and Adjustment Location: RX BOARD (See page 5)
--4--
SECTION 3 DIAGRAMS
Connection points :
Digital voltmeter (AC range)
MDR-RF830
· IC BLOCK DIAGRAMS
IC301 CXA1611N-T4
RIPPLE FILTER DETUNE DET CONTROL
AM IF OUT
[ RX BOARD ] (Conductor side)
24
23
22
21
20
19
18
17
16
15
14
Oscilloscope
FM·IF DISCRI
TUNING METER
RIPPLE FILTER
REGULATOR
DETUNE DET AM·IF DET·AGC
AM·FE
Digital voltmeter (DC range)
FM·FE
1 DETUNE DET GND
2 FM DISCRI
3 AM OSC
4 AFC
5 FM OSC
6 REG OUT
7 FM RF
8 AM RF IN
9 NC
10 FM RF IN
11 GND
Oscilloscope
IC302 LA4533M
Adjustment Location :
P/SW 1
[RX BOARD] (Component side)
IN1 2 PRE GND 3 IN2 4 REF 5
POWER SWITCH AMP1 BIAS AMP2
MUTE CIRCIUT
10 MT/SW 9 OUT1 8 POWER GND 7 OUT2 6 VCC
RV302 Tuning Knob
RV301 VOL Knob
RV303 : Separation Adjustmen L301 : Receive Frequency Adjustment
t
--5--
--6--
FM/AM FE OUT
FM/AM BAND SELECT 13 12
DET OUT
AFC AGC
AFC AGC
AM IF IN
FM IF IN
METER
GND
VCC
MDR-RF830
3.1 PRINTED WIRING BOARDS
· Semiconductor
Location
Ref. No. D301 D302 D303 IC301 IC302 IC303 IC304 Q301 Q302 Q303 Q304 Q305 Q306 Q307 Q308 Q309 Location B-3 E-3 D-4 D-3 C-4 C-3 C-3 C-3 E-3 C-4 E-4 E-3 E-3 C-3 D-3 C-3
Note: · X : parts extracted from the component side. ® : Through hole. · · b : Pattern from the side which enables seeing. Caution: Pattern face side: (SideB) Parts face side: (Side A)
Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.
--7--
--8--
MDR-RF830
3.2 SCHEMATIC DIAGRAM
· Refer tp page 6 IC Block Diagrams.
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 and 1/4 W or less unless otherwise specified. ¢ · : internal component. · U : B+ Line. · H : adjustment for repair. · Power voltage is dc 3 V and fed with regulated dc power supply from battery terminal. · Voltages are dc with respect to ground under no-signal conditions. · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. F
r
WAVEFORM
1
10mVp-p
20.4 µsec
IC301 @¡
VOLT/DIV : 2m V AC TIME/DIV : 20 µsec
--9--
-- 10 --
MDR-RF830
SECTION 4 EXPLODED VIEW
· · The mechanical parts with no reference number in the exploded views are not supplied. Hardware (# mark) list and accessories and packing materials are given in the last of this parts list. NOTE: · Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. · -XX, -X mean standardized parts, so they may have some difference from the original one. · RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable Ref. No. Part No. Description
SECTION 5 ELECTRICAL PARTS LIST
· Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. SEMICONDUCTORS In each case, u: µ, for example: uA...: µA... , uPA... , µPA... , uPB... , µPB... , uPC... , µPC... , uPD..., µPD... CAPACITORS: uF: µF COILS uH: µH Remarks Ref. No. C355 Part No.
FE
RX
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 delay should be anticipated when ordering these items.
When indicating parts by reference number, please include the board name.
·
· ·
4-1.
EXPLODED VIEW
Description 22PF 0.5PF
Remarks 50V
1 10 12 8 22 (Included 7
in Ref. No. 6) MDD01 13 #3
*
A-4542-536-A FE BOARD, COMPLETE ******************
1-162-919-11 CERAMIC CHIP < FILTER >
************************************************************ * A-4542-535-A RX BOARD, COMPLETE ****************** CF301 CF302 1-577-588-11 FILTER, CERAMIC 1-567-163-11 FILTER, CERAMIC < DIODE > < CAPACITOR > D301 D302 D303 8-719-045-99 DIODE RD2.2M-T1B 8-719-002-81 DIODE 1T363 8-719-066-57 LED SA2512 (POWER) < FERRITE BEAD > FB301 FB302 FB303 FB304 FB305 FB306 1-414-234-11 1-414-234-11 1-414-234-11 1-414-234-11 1-414-234-11 INDUCTOR CHIP 0UH INDUCTOR CHIP 0UH INDUCTOR CHIP 0UH INDUCTOR CHIP 0UH INDUCTOR CHIP 0UH
11
8 15 14 21
#2 #2 18
14
8
9
16 17
C301 C302 C303 C306 C307 C309 C310 C311 C312 C313 C314 C315 C316 C317 C318 C319 C320 C321 C322 C324 C325 C326 C327 C328 C329
1-124-589-11 1-164-489-11 1-162-921-11 1-164-227-11 1-162-927-11 1-126-572-11 1-110-563-11 1-162-923-11 1-162-970-11 1-162-926-11 1-162-957-11 1-124-233-11 1-164-245-11 1-162-970-11 1-164-346-11 1-164-505-11 1-164-346-11 1-164-346-11 1-124-242-00 1-107-725-11 1-107-725-11 1-124-635-00 1-124-635-00 1-124-635-00 1-164-346-11 1-162-964-11 1-162-912-11 1-164-441-11 1-163-021-91 1-124-233-11 1-162-924-11 1-162-924-11 1-162-970-11 1-163-037-11 1-164-489-11 1-164-346-11 1-162-966-11 1-162-923-11 1-163-021-91 1-162-198-31
ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP ELECT ELECT ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP ELECT CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC
47uF 0.22uF 33PF 0.022uF 100PF 4.7uF 0.068uF 47PF 0.01uF 82PF 220PF 10uF 0.015uF 0.01uF 1uF 2.2uF 1uF 1uF 33uF 0.1uF 0.1uF 220uF 220uF 220uF 1uF 0.001uF 7PF 68PF 0.01uF 10uF 56PF 56PF 0.01uF 0.022uF 0.22uF
20% 10% 5% 10% 5% 20% 10% 5% 10% 5% 5% 20% 10% 10%
16V 16V 50V 25V 50V 35V 16V 50V 25V 50V 50V 16V 25V 25V 16V 16V 16V 16V 25V 16V 16V 6.3V 6.3V 6.3V 16V 50V 50V 50V 50V 16V 50V 50V 25V 25V 16V 16V 50V 50V 50V 50V
#3 (Including Ref. No. 22) SW1
6
3
#2
20
4
1-414-234-11 INDUCTOR CHIP 0UH < IC >
19 5
#2
IC301 IC302 IC303 IC304
8-752-066-93 IC CXA1611N-T4 8-759-802-75 IC LA4533M 8-759-195-02 IC TC7S86F-TE85L 8-759-096-87 IC TC7WU04FU(TE12R) < JUMPER RESISTOR >
8 4 2 8
MDD02
20% 10% 10% 20% 20% 20%
JC301 JC302 JC303 JC304 JC305 JC308 JC309 JC310 JC312 JC313 JC314 JC315 JC316 JC317
1-216-296-91 1-216-296-91 1-216-296-91 1-216-296-91 1-216-296-91 1-216-864-11 1-216-295-91 1-216-864-11 1-216-295-91 1-216-864-11 1-216-864-11 1-216-864-11 1-216-295-91 1-216-295-91
SHORT SHORT SHORT SHORT SHORT METAL CHIP SHORT METAL CHIP SHORT METAL CHIP METAL CHIP METAL CHIP SHORT SHORT < COIL >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/16W 1/16W
1
Ref. No. 1 2 3 4 5 * 6 7 8 9 10 11 12 13 Part No. 4-994-129-01 X-4950-086-1 4-994-119-01 4-992-281-01 4-210-280-01 A-4542-535-A 4-994-121-11 3-713-791-01 4-995-597-01 4-994-124-11 Description PAD, EAR HOUSING (R) ASSY HANGER (R) HOLDER, BALL SHAFT PLATE, RX SHIELD RX BOARD, COMPLETE COVER (R), HANGER SCREW (M1.7X4), TAPPING, P2 SPACER SUSPENDER Remarks Ref. No. 14 15 16 17 18 19 20 21 * 22 MDD01 Part No. 4-995-475-01 4-994-130-01 4-994-132-01 4-993-020-01 4-994-131-01 4-994-122-01 4-994-120-01 3-831-441-99 A-4542-536-A 1-505-117-21 Description SPRING, TENSION TERMINAL (+), BATTERY TERMINAL (MIDWAY), BATTERY CASE, BATTERY TERMINAL (-), BATTERY COVER (L), HANGER HANGER (L) CUSHION, SPEAKER FE BOARD, COMPLETE RECEIVER (L-CH) Remarks
C330 C331 C332 C333 C334 C335 C336 C337 C338 C339 C340 C341 C342 C350 C352
10% 0.5PF 5% 10% 20% 5% 5% 10% 10% 10%
4-994-118-01 BAND, HEAD 4-994-123-11 COVER, BATTERY X-4950-087-1 HOUSING (L) ASSY
MDD02 1-505-117-21 RECEIVER (R-CH) SW1 1-771-249-11 SWITCH, PUSH (1 KEY)(POWER)
1uF 0.0022uF 10% 47PF 5% 0.01uF 10% 8.2PF 10%
L301 L302 L303
1-422-317-31 COIL, AIR-CORE 1-412-933-11 INDUCTOR 0.33uH 1-414-140-11 INDUCTOR 0.68uH
-- 11 --
-- 12 --
Ref. No.
Part No.
Description < TRANSISTOR >
Remarks
Ref. No.
Part No.
Description MISCELLANEOUS *************
Remarks
Q301 Q302 Q303 Q304 Q305 Q306 Q307 Q308 Q309
8-729-230-49 8-729-230-49 8-729-230-49 8-729-230-49 8-729-230-49 8-729-920-31 8-729-230-49 8-729-040-78 8-729-027-36
TRANSISTOR 2SC2712-YG TRANSISTOR 2SC2712-YG TRANSISTOR 2SC2712-YG TRANSISTOR 2SC2712-YG TRANSISTOR 2SC2712-YG TRANSISTOR DTC343TK TRANSISTOR 2SC2712-YG TRANSISTOR DTA124GKA-T146 TRANSISTOR DTA143XKA-T146
MDD01 1-505-117-21 RECEIVER (L-CH) MDD02 1-505-117-21 RECEIVER (R-CH) SW1 1-771-249-11 SWITCH, PUSH (1 KEY)(POWER)
************************************************************ ************* HARDWARE LIST ************* #1 #2 #3 7-685-106-19 SCREW +P2X10 TYPE2 NON-SLIT 7-685-105-19 SCREW +P2X8 TYPE2 NON-SLIT 7-685-107-19 SCREW +P2X12 TYPE2 NON-SLIT
< RESISTOR > R301 R302 R303 R304 R305 R306 R307 R308 R309 R310 R311 R312 R313 R314 R315 R316 R317 R318 R319 R320 R321 R322 R323 R324 R325 R326 R327 R328 R329 R330 R331 R334 R335 R342 R345 R348 R349 R350 R360 1-216-857-11 1-216-101-00 1-216-081-00 1-216-061-00 1-216-101-00 1-216-853-11 1-216-845-11 1-216-089-91 1-216-841-11 1-216-817-11 1-216-821-11 1-216-853-11 1-216-827-11 1-216-822-11 1-216-830-11 1-216-827-11 1-216-061-00 1-216-831-11 1-216-061-00 1-216-845-11 1-216-843-11 1-216-843-11 1-216-859-11 1-216-033-00 1-216-825-11 1-216-827-11 1-216-809-11 1-216-835-11 1-216-001-00 1-216-001-00 1-216-097-91 1-216-845-11 1-216-029-00 1-216-831-11 1-216-841-11 1-216-831-11 1-216-001-00 1-216-823-11 1-216-837-91 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES,CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES,CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES,CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 1M 150K 22K 3.3K 150K 470K 100K 47K 47K 470 1K 470K 3.3K 1.2K 5.6K 3.3K 3.3K 6.8K 3.3K 100K 68K 68K 1.5M 22 2.2K 3.3K 100 15K 10 0 100K 100K 150 6.8K 47K 6.8K 10 1.5K 22K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/16W 1/10W 1/10W 1/10W 1/10W 1/16W 1/16W 1/10W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/10W 1/10W 1/10W 1/16W 1/16W 1/16W 1/16W 1/10W 1/16W 1/16W 1/16W 1/16W 1/10W 1/10W 1/10W 1/16W 1/10W 1/16W 1/16W 1/16W 1/10W 1/16W 1/16W
< VARIABLE RESISTOR > RV301 1-223-968-11 RES, VAR, CARBON 20K/20K (VOL) RV302 1-225-641-11 RES, VAR, CARBON 10K (TUNING) RV303 1-238-601-11 RES, ADJ, CARBON 22K (SEPARATION) ************************************************************
-- 13 --
MDR-RF830
Sony Corporation
9-924-939-13
Personal Audio Company
-- 14 --
99H1639-1 Printed in Japan ©1999.8 Published by General Engineering Dept.