Kenwood RXD 751 E Service Manual

Page 1

RXDE501~751(K)COVER(98t4t23le42 y [w 2 if

MINI HiFi COMPONENT SYSTEM

RXD-501/501E/501W/551/551E/551W/5718/A5/ KENWOOD
701/701 E/701W/751/751E/751W/7718/A8

SERVICE MANUAL
(XD-501~A8)**

© 1998-3/351-5420-00 (K/K) 3661

L

From glass Lighting board
(810-) (B19-1589-04)

Lighting board
(B19-1586-04) (A60-)

MINI in cnmzm 5mm

Phone jack 1 I
O (E11-0169-05) lK-l w @ (EON
Cassette lid (L)

5.5 (m

(A53-)

Front glass
(310-2445-13)

AUTO REVERSE

Amy

AUTO REVERSE

Lighting board
(B19-1587-03)

a

KENWOOD

"Refer to page 2 if you want to know system configuration.

Panel assy

Knob
(K29-)

Phone jack
(E11-0280-05)

Cassette lid (RV
(A53-)

From glass
(310-2447-13)

Panel (CD)
(A29-)

* Refer to parts list on page 58.

In compliance with Federal Regulations, following are reproduc-
tions of labels on, or inside the product relating to laser product
safety.

Refer to RXD-500/700 (851-5300-00), If you require

KENWOOD-Cropt certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.

DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM

TUNER preset frequency in detail.

Page 16

JRXD 501 i51 RXD- 501/551/57l/A5/701/751/77l/A8

ADJUSTMENT

16

5. Cassette Deck adjustment

4%

TAPE: NORMAL

I . Cassette mechanism

DOLBY: OFF

PLAY OUT. Lch

(X28 CNG (Dpin), Rch (X28,CN6 @pin)
unit (Adjustment of the REC / PLAY head)

INPUT OUTPUT DECK ALIGNMENT
"° EM SETTING SETTING SETTING POINT AL'G" F0 F'G-
Unless otherwise specified set the respective switches as follows. 0st=O.775V

Demagnetize the
REC / PLAY head
with the head eras

Frequency counter

a an
aim

Power : OFF Recording -
< 1 > Demagnetization _ _ Demagnetiza- head. erase ePrLCzleahnetahde Egg;
and cleaning tion,cleaning, head,capstan head capstan and
PLAY pm°h roller pinch roller using a
cotton swab slightly
damped with alcohol.
Adjust the output to
maximum and adjust
TCC 153 the azimuth adjust-
- 7 ment screw for the
< 2 > REfi'flgfifl'flggd MTT7114 (B) PLAY Lissajours waveform
10kHz, 710dB pattern of the oscillo-
scope to become
close to a 45
straight line.
11. PC BOARD ADJUSTMENT
TCC7110 A DECK Adjust the tape
< 1 > TAPE MTT7111 (B) PLAY VR 5 speed so that 3kHz
SPEED(NORMAL) SCC4 727 B DECK is obtained at the
3kHz VR 6 center of the tape.
III. PC BOARD ADJUSTMENT
A DECK
VR 7 (L)
PLAYBACK MTTe 150 VR 8 ( ) Adjust the playback
< 1 > LEVEL 400Hz (B) PLAY B DECK output to -2.5st
VRt (L)
VR 2 (R)
(A) Record 400Hz and
Adjust the AG REC 12.5kHz alternately,
for the output of A VFI 3 (L) and adjustthe bias
< 2 > BIAS CURRENT the DECK to (B) , VR 4 (R) current adjustment
become 400Hz potentiometer for the
(-20dB)/12.5kHz PLAY playback levels to
(-20dB) become the same.
X28, CN6
'1)
k t} L our
L IN
{3
GND
4}
a R our
a
Oscilloscope AC voltmeter