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SERVICE MANUAL
Ver 1.2 2001. 11
MDR-RF845R is the component model block one in the MDR-RF845RK.
COMPONENT MODEL NAME FOR MDR-RF845RK
Headphones
MDR-RF845R
Transmitter
TMR-RF845R
Sony Corporation
9-927-958-12
2001K1600-1
Personal Audio Company
© 2001.11
Published by Sony Engineering Corporation
MDR-RF845R
SPECIFICATIONS
Headphones
Power source
DC 2.4 V: Built-in rechargeable
battery
Mass
Approx. 240 g (8.1 oz.) incl.
built-in rechargeable battery
Built-in Ni-Cd rechargeable battery
Model name
NC-AA
Voltage
1.2 V
Capacity
700 mAh
Design and specifications are subject to change without
notice.
AEP Model
UK Model
HEADPHONES
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Table of Contents
Related Manuals for Sony MDR-RF845R
Summary of Contents for Sony MDR-RF845R
- Page 1 MDR-RF845R SERVICE MANUAL AEP Model UK Model Ver 1.2 2001. 11 MDR-RF845R is the component model block one in the MDR-RF845RK. COMPONENT MODEL NAME FOR MDR-RF845RK Headphones MDR-RF845R Transmitter TMR-RF845R SPECIFICATIONS Headphones Power source DC 2.4 V: Built-in rechargeable battery Mass Approx.
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Page 2: Section 1 General
If you do not receive a clear audio signal, press it again. A MDR-RF845R The power turns on. TUNING button VOL control... -
Page 3: Section 2 Disassembly
SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. RX-BASE BOARD × 6) 1 Five screws (P 2 Cover (R), hanger Claw q; Switch, push (1 key) 9 Remove the two solderings. 7 RX-BASE board Claw ×... - Page 4 Set the lead wires Set the each lead wires as illustrated below. Cover (R), hanger Cover (L), hanger No.201, No.203 Groove Groove No.203 No.201 Groove No.205 Groove No.201 No.203 Groove No.204 No.202 No.202 Groove To the driver (030F032). To the driver (030F032). To the RX-BASE board No.201, No.203 Groove...
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Page 5: Section 3 Electrical Adjustments
13. Push the headphones tuning switch (S301) to receive radio 2. On adjusting the headphones section, use the transmitter as a frequency. jig. 14. Check same step 8. Headphones:MDR-RF845R 15. Set the transmitter CHANNEL switch to 3. Transmitter:TMR-RF845R 16. Push the headphones tuning switch (S301) to receive radio frequency. - Page 6 Ver 1.2 2001. 11 17. Check the difference of the L and R to more than 20 dB. Digital voltmeter OSCILLOSCPE (AC range) L+ / R+ IC301 pin4 L– / R– – L– – – Adjustment Location : [RX-BASE BOARD] IC301 7 (Connect a 33k Ω...
- Page 7 MDR-RF845R SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAM L302 Note on Printed Wiring Board: IF AMP/DECODE RV302 IC301 • X : parts extracted from the component side. VOLUME • : Through hole. ® SPEAKER POWER AMP • b : Pattern from the side which enables seeing.
- Page 8 MDR-RF845R 4-2. SCHEMATIC DIAGRAM — 9 — — 10 —...
- Page 9 MDR-RF845R 4-3. PRINTED WIRING BOARD • Semiconductor Location Ref. No. Location D301 D303 D304 D310 IC301 IC302 IC303 IC304 IC305 Q301 Q303 Q304 Q305 — 11 — — 12 —...
- Page 10 MDR-RF845R MEMO...
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Page 11: Section 5 Exploded Views
Ver 1.1 2000. 11 SECTION 5 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number have some differences from the original one. in the exploded views are not supplied. •... -
Page 12: Section 6 Electrical Parts List
SECTION 6 RX-BASE ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • CAPACITORS: • SEMICONDUCTORS parts list may be different from the parts uF: µF In each case, u: µ, for example: specified in the diagrams or the components •... - Page 13 RX-BASE Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < TRANSISTOR > R348 1-216-089-91 RES-CHIP 1/10W R349 1-216-073-00 METAL CHIP 1/10W Q301 8-729-903-10 TRANSISTOR FMW1 R350 1-216-077-00 RES-CHIP 1/10W Q303 8-729-230-49 TRANSISTOR 2SC2712-YG R351 1-216-121-91 RES-CHIP 1/10W Q304 8-729-230-49 TRANSISTOR...
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Page 14: Revision History
MDR-RF845R REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. Date Description of Revision 2001.01...