KENWOOD RXD-751A8
Instrukcja Serwisowa

RXD-501/551/571/A5/701/751/771/A8
ADJUSTMENT
5. Cassette Deck adjustment
No ITEM INPUT SETTING OUTPUT SETTING DECK SETTING ALIGNMENT POINT ALIGN FOR FIG.

Unless otherwise specified, set the respective switches as follows: TAPE : NORMAL DOLBY : OFF PLAY OUT : Lch (X28,CN6 1pin), Rch (X28,CN6 4pin) ø. Cassette mechanism unit (Adjustment of the REC / PLAY head)

0dBs=0.775V

<1>

Demagnetization and cleaning

�

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Power : OFF Demagnetization,cleaning, PLAY

Demagnetize the REC / PLAY head with the head erasRecording er.Clean the REC / head, erase PLAY head, erase head,capstan head,capstan and pinch roller pinch roller using a cotton swab slightly damped with alcohol. Adjust the output to maximum and adjust the azimuth adjustment screw for the Lissajours waveform pattern of the oscilloRVS scope to become close to a 45° straight line.

<2>

Azimuth of the REC/PLAY head

TCC�153 MTT�114 10kHz, � 10dB

(B)

PLAY FWD

¿. PC BOARD ADJUSTMENT <1> TAPE SPEED(NORMAL) TCC�110 MTT�111 SCC�1727 3kHz (B) PLAY

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A DECK VR B DECK 5 VR 6

Adjust the tape speed so that 3kHz is obtained at the center of the tape.

¡. PC BOARD ADJUSTMENT A DECK VR 7 (L) VR 8 (R) B DECK VR 1 (L) VR 2 (R)

<1>

PLAYBACK LEVEL

MTT� 150 400Hz

(B)

PLAY

Adjust the playback output to -2.5dBs

<2>

(A) Adjust the AG for the output of BIAS CURRENT the DECK to become 400Hz (-20dB)/12.5kHz (-20dB)
X28, CN6
1 L IN GND

REC (B)

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PLAY

VR 3 (L) VR 4 (R)

Record 400Hz and 12.5kHz alternately, and adjust the bias current adjustment potentiometer for the playback levels to become the same.

L OUT

R OUT R IN 5

AC voltmeter

AG

Oscilloscope

AC voltmeter Frequency counter

(A)

(B)

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