Sony TMR-RF845R 서비스 매뉴얼 - 페이지 4

{카테고리_이름} Sony TMR-RF845R에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Sony TMR-RF845R 11 페이지. Wireless stereo headphone sysytem
Sony TMR-RF845R에 대해서도 마찬가지입니다: 서비스 매뉴얼 (2 페이지)

페이지 인쇄

1. Setting up the Transmitter

3 7 63 1515 0

Setting :

AF signal

generator

Telescopic

antenna

Frequency counter

Send Frequency Check

1. Set the noise filter SW to OFF.

2. Input a signal of 1 kHz 40 mVrms to only the L-CH (J402).

3. Connect a telescopic antenna to the frequency counter input

and extend the antenna to a length of approximately 8 cm.

4. Place TX-BASE board close to the frequency counter, then mea-

sure the frequencies of CH1, CH2 and CH3 and make sure the

values are as follows:

CH1 : 863.5 MHz ± 40 kHz

L 13942296513

CH2 : 864.0 MHz ± 40 kHz

CH3 : 864.5 MHz ± 40 kHz

When the frequency is not satisfied the specified value, exchange

vco unit. When completed with replacement, recheck the

frequecies of CH1, CH2 and CH3.

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SECTION 3

ELECTRICAL ADJUSTMENTS

set

TMR-RF875R

L-CH (J402)

set

8 cm

TMR-RF875R

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2 9

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 measured value is other than the specified value, adjust to

1.6mVrms ± 0.1mV by turning the RV403 on the TX-BASE

board.

Connection points and Adjustment Location :

[TK-BASE BOARD] (Component side)

CH3 ← CH2 ← CH1

(L-CH) (R-CH)

S402

RV403

VCO UNIT

Q Q

6 7

1 3

1 5

9 4

2 8

J402

0 5

2 9

9 4

2 8

9 9