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TMR-RF845R
SERVICE MANUAL
Ver 1.0 2000. 07
TMR-RF845R is the component model block one in the MDR-RF845RK.
COMPONENT MODEL NAME FOR MDR-RF845RK
Headphones MDR-RF845R
Transmitter TMR-RF845R
AEP Model
UK Model
SPECIFICATIONS
General
Carrier frequency
863.5 – 864.5 MHz
Channel Ch1, Ch2, Ch3
Modulation FM stereo
Frequency response
20 – 20,000 Hz
Transmitter
Power source DC 9 V: supplied AC power
Audio input phono jacks/stereo mini jack
Dimensions Approx. 150 mm dia × 108 mm
Mass Approx. 190 g (6.2 oz.)
Design and specifications are subject to change without
notice.
adaptor
(6 × 4
1
/3 in.) (w/h)
TRANSMITTER
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Setting up the
SECTION 1
GENERAL
A To connect to a headphones jack
This section is extracted
from instruction manual.
transmitter
1
Connect the transmitter to audio/video
equipment. Select one of the hookups
below depending on the jack type:
Transmitter
OFF ON
FILTERNOISE
Right channel
(red)
Connecting cord
(supplied)
Unimatch plug
adaptor
(supplied)
to headphones
jack (stereo
phone jack)
RBAL
AUDIO IN
CD Walkman,
MD Walkman,
WALKMAN*,
VCR, etc.
to AUDIO IN
A jacks
DC IN 9V
123
CHANNEL
Left channel
(white)
to headphones
jack (stereo
mini jack)
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer.
1. Check the area of your repair for unsoldered or poorlysoldered connections. 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. 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
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SECTION 2
DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
2-1. CABINET (UPPER)
2
Cabinet (upper)
1
Four screws (P 2
× 8)
2-2. TX-BASE BOARD
2
TX-BASE board
Cabinet assy, lowe
1
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