Denon DN-730R Adjusting and Checking, Adjusting the Playback and Recording Section, Lll

ADJUSTING AND CHECKING THE[

_ELECTRICAL SECT] _ON............

•Caution on adjusting

(1)Before adjusting, clean the head surface, capsta_l ,_r_d the pinch roller with a gauze or a cotton swab moistened with alcohol.

(2)Demagnetize the R/P HEAD and the E. HEAD with a head eraser.

(3)Completely demagnetize the adjustment screwdriver.

(4)Unless instructed otherwise, set the various controls as fol- lows.

©	INPUT volume	maximum
©	DOLBY NR switch	OFF
©	TAPE SPEED volume	Center position

3.Checking and Adjusting the Tape Speed

(1)Connect the frequency counter to the LINEOUT tern_inal and load test tape (SONY TY-224).

(2)Playback a test tape. At about halfway through the tape, where the tape transport is stable, adjust the adjustment points (RT305) on the P.W. BOARD (222 2778 ***) so that the frequency counter will have a reading within the range of 3,000 Hz +6 Hz. Fig. 3-1

F Counter

PB Amp

0UT3000 Hz +6Hz

SONY TY-224

DN-730R I

,Adjusting the Playback and Recording Section

Procedure

Item

Usage tape --

Response

Mode

Adjustment

Adjustment

procedure

input condition

location

1

PLAYBACK

A-BEX

Fig. 4-1

PLAYBACK

RT-101

(L)

Adjust

the LINEOUT

output to 775

mV

GAIN

TCC- 130

RT-201

(R)

(O dBs).

2

P.B.

A-BEX

Fig. 4-1

PLAYBACK

Make

sure the playback characteristics

Frequency

TCC-162B,

262B

conform

to Figure4-2.

3

REC/P.B.

GR-2/60

Fig. 4-2

REC. PLAY

RT-103

(L)

Record

1 kHz and 10 kHz alternately.

Frequency

1 kHz,

--40

dB

_

RT-203

(R)

Adjust

each volume

so the 10 kHz

10 kHz,

--40

dB

PLAYBACK

playback

output is 0.5 dB in relation

to

the 1 kHz playback output.

4

REC GAIN

GR-2/60

Fig. 4-2

REC. PLAY

RT-108

(L)

Adjust

each volume

to the playback

output

1 kHz, --30

dB

_

RT-208

(R)

is the

same as when

the recording

monitor

PLAYBACK

is output.

5

REC/P.B.

GR-2/60

Fig. 4-3

REC. PLAY

Make

sure that the DOLBY NR C recording

1. Tape Transport Check

Load the transport check cassette In the operational mode, illu-

minate the fixing guides of the R/P HEAD with a lamp and check						r"
to make sure the tape edge does not come in contact with the
tape guide section						¢
	i _		[]	ol,,_.___.......J	J
		d i .
The tape transport is the most important element in determining	i°:
the performance of a cassette deck.
Avoid moving the various adjustment screws, nuts, etc., as much
as possible Refer to the pages on "Adjusting and Checking the
Mechanism Section" when replacing or adjusting the R/P HEAD

2.Adjusting the Azimuth

(1)After completing the tape transport check, load the test

tape (A-BEX TCC-153). Fig. 2-1

(2)Playback the test tape; adjust the azimuth screw so that section A of the resurge wave form is maximum and section

B is minimum. Fig. 2-2-"_ "APE

Fig, 3-1

OSCILLOSCOPE

;	/	PO,'DOLBYNR	/
A-_EX I _		_	,,_	L-€.
	TAPE	PB/DOLBY NR	OUT	-

Fig. 2-1

RESURGE WAVE

O" 30" 90" 135" 180"

OKNG

Frequency	Dolby NR C	_	and playback characteristics conform to
		PLAYBACK	Figure 4-3.
	Playback	Frequency	Response

.......

+r

-4

-

--_

!

i! ....

_6

Fig. 4-1

20

50

_oo

200

SO0

t k

2=

_

10k

_4_

20_ {Mz)

Tape A.BEX TCC-262B/162B

Record/Playback

Overall

Frequency

Response

(do)

J_

I

[

_

]

II

.6

.4

'' I

ii

,"f..,.

,

I

t!!

',

!

,z

,-,,-" ---I

P

.I

0

_._J_._l

i

:ill

;

]

I

i

-I.

-- --4-------.I

_[

I

I

illl

!

I

i

1

I,

-2

-4

_T

I ;;i',[

_L___L_L_

°

I'

Fig. 4-2

-'

_

_ !_J_!

_

!

l_

20

50

ioo

200

_00

k

2w

5_

Ta_

HD-TE_60

Dolby

NR

Off

Level

--

20

dB From

Dolb¥

Level

Dolby

C Record/Playback

Overall Frequency Response

.6_

till

:I

--•

__

_

1

J

.2---------+------i----

°t ....

-+---_

_

-2

IIII

1

-,---

I

I

lIII

-5---

I

*

Itlt

-is

_

i

. Fig.

20

50

tOO

200

500

IK

2k

5k

t0k

14k

20k(z)

Tope

HO-7E/60

Dolby

NR

On

C

Level

--

20

dB From

Dolby

Level

Fig. 2-2