Sony TMRRF-815-R Service manual

TMR-RF815R

SERVICE MANUAL

Ver 1.0 2000. 06

TMR-RF815R is the component model block one in the MDR-RF815RK.

COMPONENT MODEL NAME FOR MDR-RF815RK

Headphones MDR-RF815R
Transmitter TMR-RF815R

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

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.

TRANSMITTER

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

— 2 —

SECTION 2

r

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

— 3 —