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No.201

Cover (L), hanger

Cover (L), hanger

No.203

No.201, No.203

No.201, No.203

Groove

Set the lead wires

No.204

No.205

No.202

No.202

No.203

No.201

Set the each lead wires as illustrated below.

Cover (R), hanger

A

B

Cover (R), hanger

Groove

Groove

Groove

Groove

Groove

To the driver (030F032).

To the RX-BASE board

Groove

To the driver (030F032).

B

A

Summary of Contents for MDR-RF845R

Page 1: ...R Transmitter TMR RF845R MDR RF845R is the component model block one in the MDR RF845RK COMPONENT MODEL NAME FOR MDR RF845RK 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 witho...

Page 2: ...heck 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 Look for parts which through functioning show obvious signs of deterioration Point them out to the customer and recommend thei...

Page 3: ...talltion Precaution for installtion 7 RX BASE board q Switch push 1 key Cover R hanger No 203 No 203 black No 202 red No 201 green No 201 No 204 No 205 No 204 No 202 4 Screw P 2 8 1 Five screws P 2 6 2 Set the psuh switch 1 key Suspender 1 Slide the suspender in the direction of the arrow 6 Button tuning Claw Claw 2 5 8 2 1 RX BASE BOARD Note Follow the disassembly procedure in the numerical order...

Page 4: ...01 No 203 Groove Set the lead wires No 204 No 205 No 202 No 202 No 203 No 201 Set the each lead wires as illustrated below Cover R hanger A B Cover R hanger Groove Groove Groove Groove Groove To the driver 030F032 To the RX BASE board Groove To the driver 030F032 B A ...

Page 5: ...transmitter off check the waveform of the oscilloscope as follows 12 Set the transmitter CHANNEL switch to 1 13 Push the headphones tuning switch S301 to receive radio frequency 14 Check same step 8 15 Set the transmitter CHANNEL switch to 3 16 Push the headphones tuning switch S301 to receive radio frequency 17 Check same step 8 3 3 Carrier Modulation Check 1 Set the transmitter CHANNEL switch to...

Page 6: ...ILLOSCPE L CH1 CH2 17 Check the difference of the L and R to more than 20 dB Ver 1 2 2001 11 IC301 7 IC301 4 IC301 6 GND Short L L R R GND TP R312 C320 Connect a 33k Ω resistor RV301 Free Run Frequency Adjustment B power line DC 2 4V RV302 Volume control L301 Receive Frequency Adjustment S301 TUNE switch ...

Page 7: ...µF unless otherwise noted pF µµF 50 WV or less are not indicated except for electrolytics and tantalums All resistors are in Ω and 1 4 W or less unless otherwise specified internal component A B Line H adjustment for repair Power voltage is dc 2 4 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...

Page 8: ...MDR RF845R 4 2 SCHEMATIC DIAGRAM 9 10 ...

Page 9: ...MDR RF845R 4 3 PRINTED WIRING BOARD 11 12 Ref No Location D301 B 1 D303 B 3 D304 B 2 D310 C 2 IC301 A 2 IC302 C 2 IC303 A 1 IC304 B 3 IC305 B 2 Q301 B 3 Q303 B 2 Q304 B 2 Q305 B 2 Semiconductor Location ...

Page 10: ...MDR RF845R MEMO ...

Page 11: ...ENDER 2 3 046 671 01 BAND HEAD 3 3 046 692 01 PAT EAR 4 1 542 400 11 DRIVER 030F032 5 3 046 685 01 PLATE L FRONT 6 3 046 675 01 HANGER R 7 1 771 249 11 SWITCH PUSH 1 KEY 8 4 992 281 01 HOLDER BALL SHAFT 9 4 981 975 01 SPRING FREE ADJUSTMENT 10 A 4542 649 A RX BASE BOARD COMPLETE 11 3 046 677 01 COVER R HANGER 12 3 049 799 01 LIGHT MDR GUIDE 13 3 046 679 01 CAP R ORNAMENTAL 14 3 046 674 01 HANGER L...

Page 12: ...329 1 163 021 91 CERAMIC CHIP 0 01uF 10 00 50V C330 1 124 242 00 ELECT 33uF 20 25V C331 1 164 346 11 CERAMIC CHIP 1uF 16V C332 1 163 245 11 CERAMIC CHIP 56PF 5 00 50V C333 1 163 220 11 CERAMIC CHIP 3PF 0 25PF 50V C336 1 163 245 11 CERAMIC CHIP 56PF 5 00 50V C337 1 163 251 11 CERAMIC CHIP 100PF 5 00 50V C340 1 163 038 00 CERAMIC CHIP 0 1uF 25V C341 1 163 038 00 CERAMIC CHIP 0 1uF 25V C342 1 163 021...

Page 13: ... 057 00 METAL CHIP 2 2K 5 1 10W R340 1 216 065 91 RES CHIP 4 7K 5 1 10W R341 1 216 113 00 METAL CHIP 470K 5 1 10W R342 1 216 106 00 METAL CHIP 240K 5 1 10W R343 1 216 099 00 METAL CHIP 120K 5 1 10W R344 1 216 092 00 RES CHIP 62K 5 1 10W R345 1 216 084 00 METAL CHIP 30K 5 1 10W R346 1 216 077 00 RES CHIP 15K 5 1 10W R347 1 216 070 00 METAL CHIP 7 5K 5 1 10W R348 1 216 089 91 RES CHIP 47K 5 1 10W R3...

Page 14: ... 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 1 2 2001 01 Correction of electrical adjustments 1 1 2000 11 Change of exploded view 1 0 2000 06 New ENG 01023 ENG 00019 ...

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