Denon DN-730R - Manual (Page 9)

D N - 7 3 0 R I
4. Adjusting the Playback and Recording
Section
Procedure Item
Usage tape —
input condition
Response Mode
Adjustment
iocation
Adjustment procedure
1 PLAYBACK
GAIN
A-BEX
TCC-130
Fig. 4-1 PLAYBACK RT-101 (L)
RT-201 (R)
Adjust the LINEOUT output to 775 mV
(OdBs).
2 P.B.
Frequency
A-BEX
TCC-162B,262B
Fig. 4-1 PLAYBACK Make sure the playback characteristics
conform to Figure 4-2.
3 REC/P.B.
Frequency
GR-2/60
1 kHz, -40 dB
10 kHz, -40 dB
Fig. 4-2 REC. PLAY
1
PLAYBACK
RT-103 (L)
RT-203 (R)
Record 1 kHz and 10 kHz alternately.
Adjust each volume so the 10 kHz
playback output is 0.5 dB in relation to
the 1 kHz playback output.
4 REC GAIN GR-2/60
1 kHz, -30 dB
Fig. 4-2 REC. PLAY
1
PLAYBACK
RT-108 (L)
RT-208 (R)
Adjust each volume to the playback output
is the same as when the recording monitor
is output.
5 REC/P.B.
Frequency
GR-2/60
Dolby NR C
Fig. 4-3 REC. PLAY
i
PLAYBACK
Make sure that the DOLBY NR C recording
and playback characteristics conform to
Figure 4-3.
Playback Fraquancy Raaponaa
Fig. 4-1
Racord/Playback Ovarall Fraquancy Rasponsa
Fig. 4-2
Tape HD-7E'60
Dolby NR Off
Level — 20 dB from Dolby Level
Dolby C Racord/Playback Ovarall Fraquancy Rasponsa
Fig. 4-3
ADJUSTING AND CHECKING THE
ELECTRICAL SECTION
e
(
1
)
( 2 )
(3)
(4)
Caution on adjusting
Before adjusting, clean the head surface, capstan and the
pinch roller with a gauze or a cotton swab moistened with
alcohol.
Demagnetize the R/P HEAD and the E. HEAD with a head
eraser
Completely demagnetize the adjustment screwdriver.
Unless instructed otherwise, set the various controls as fol­
lows.
O INPUT volume............................................................ maximum
O DOLBY NR switch................................................................OFF
O TAPE SPEED volume........................................Center position
3. Checking and Adjusting the Tape Speed
(1) Connect the frequency counter to the LINE OUT terminal
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
PB Amp
SONY TY-224
LINE OUT
F. Counter
3000 I
3000 Hz
Í 6Hz
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
to make sure the tape edge does not come in contact with the
tape guide section.
The tape transport is the most important element in determining
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
.
( 1 )
( 2 )
Adjusting the Azimuth
After completing the tape transport check, load the test
tape (A-BEX TCC-153). Fig. 2-1
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
OSCILLOSCOPE
L-CM fl-CH
Fig. 3-1
RESURGE VYAVE
Y
O'
y
O
30' 90' 135' 180'
Y
OK NG
Fig. 2-2