Sony TMR-RF845R Service Manual Download Page 2

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SECTION 1

GENERAL

DC IN 9V

OFF ON

FILTER

NOISE

1 2 3

CHANNEL

R

B

A

L

AUDIO IN

Setting up the
transmitter

1

Connect the transmitter to audio/video
equipment.  Select one of the hookups
below depending on the jack type:

A

To connect to a headphones jack

Transmitter

Left channel
(white)

Right channel
(red)

Unimatch plug
adaptor
(supplied)

CD Walkman,
MD Walkman,
WALKMAN*,
VCR, etc.

to headphones
jack (stereo
mini jack)

Connecting cord
(supplied)

to AUDIO IN
A jacks

to headphones
jack (stereo
phone jack)

This section is extracted
from instruction manual.

1.

Check the area of your repair for unsoldered or poorly-
soldered connections.  Check the entire board surf
ace
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.

Look for parts which, through functioning, show obvious
signs of deterioration.  Point them out to the customer
and recommend their replacement.

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

SAFETY CHECK-OUT

After correcting the original service problem, perform the following

safety checks before releasing the set to the customer.

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Summary of Contents for TMR-RF845R

Page 1: ...ncy response 20 20 000 Hz Transmitter Power source DC 9 V supplied AC power adaptor Audio input phono jacks stereo mini jack Dimensions Approx 150 mm dia 108 mm 6 4 1 3 in w h Mass Approx 190 g 6 2 oz Design and specifications are subject to change without notice Ver 1 0 2000 07 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 ...

Page 2: ...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 their replacement 5 Check the B voltage to see it is at the values specified 6 Flexible Circuit Board Repairing ...

Page 3: ...Cabinet assy lower 1 Note Follow the disassembly procedure in the numerical order given www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 4: ...SE BOARD Component side AF signal generator Telescopic antenna 8 cm L CH J402 TMR RF875R set TMR RF875R set Frequency counter Pilot signal Modulation Check and Adjustment 1 Set the channel to CH2 2 No signal input The operating time in this case is limited to 4 or 5 minutes 3 Measure the movable terminal of RV403 using an digital volt meter AC range and make sure the value is 1 6mVrms 0 1mV If the...

Page 5: ...in 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 9 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 wit...

Page 6: ...w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 7: ...403 D 4 IC404 B 3 IC405 D 2 Q401 D 1 Q402 B 4 Q404 B 4 Semiconductor Location TX BASE BOARD w w w x i a o y u 1 6 3 c o m Q Q 3 7 6 3 1 5 1 5 0 9 9 2 8 9 4 2 9 8 T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

Page 8: ...163 018 00 CERAMIC CHIP 0 0056uF 5 50V C443 1 164 346 11 CERAMIC CHIP 1uF 16V C444 1 163 251 11 CERAMIC CHIP 100PF 5 00 50V C445 1 163 251 11 CERAMIC CHIP 100PF 5 00 50V C451 1 124 635 00 ELECT 220uF 20 00 6 3V C452 1 163 038 00 CERAMIC CHIP 0 1uF 25V C453 1 126 157 11 ELECT 10uF 20 16V C454 1 163 251 11 CERAMIC CHIP 100PF 5 00 50V C455 1 163 227 11 CERAMIC CHIP 10PF 0 50PF 50V C457 1 163 003 11 C...

Page 9: ...447 1 216 214 00 RES CHIP 4 7K 5 1 8W R448 1 216 049 91 RES CHIP 1K 5 1 10W R449 1 216 081 00 METAL CHIP 22K 5 1 10W R451 1 216 073 00 METAL CHIP 10K 5 1 10W R452 1 216 077 00 RES CHIP 15K 5 1 10W R453 1 216 073 00 METAL CHIP 10K 5 1 10W R454 1 216 073 00 METAL CHIP 10K 5 1 10W R455 1 216 077 00 RES CHIP 15K 5 1 10W R456 1 216 051 00 METAL CHIP 1 2K 5 1 10W R457 1 216 214 00 RES CHIP 4 7K 5 1 8W R...

Page 10: ...2000 7 Published by PE General Engineering Dept 9 927 957 11 www xiaoyu163 com QQ376315150 9 9 2 8 9 4 2 9 8 TEL 13942296513 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3 Q Q TEL 13942296513 QQ 376315150 892498299 TEL 13942296513 QQ 376315150 892498299 http www xiaoyu163 com http www xiaoyu163 com ...

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