Denon DRM-800A Service Manual page 18

3. Tape Speed Verification and Adjustment
3-1 Connect the frequency counter to the LINE OUT terminal
and load a test tape (SONY TY -224)
3-2 Playback the test tape. When the test tape playback stabi-
lizes at the center part of the tape, adjust the regulator on
the back side of the capstan motor so that the frequency
counter reading is set within the range of 3000 Hz±6 Hz.
F.Counter
PB Amp
LINE OUT
3000 Hz
:!:
6 Hz
SONY TY -224
4. Playback System Adjustment
4-1 Playback level
Playback a test tape for Dolby standard level (A-BEX
TCC-130), Adjust RT101 (Lch) and RT201 (Rch) so that
the LINEOUT terminal level is at -2 dB (0.620 V).
LINE OUT
V.V
A-BEX TCC-130
DC motor
Adjustmentpart
Capstanmotor
4-2 Verifying playback frequency characteristics
Playback the test tape (A-BEX TCC-262B/162B) and verify
that the frequency characteristics conform to the specified
standard.
Note: Before checking the playback frequency response, first
adjust the azimuth using the 8 kHz signal at the beginning
of the test tape (A-BEX TCC-262B). Also, after checking
the playback frequency, make sure to readjust the azi-
muth with the test tape (A-BEX TCC-1 53) and then lock
the adjustment screw.
LINE OUT
V.V
A-BEX TCC-262B/162B
Playback frequency characteristics
(db)
+6
+5
+4
+3
+2
+,
o
-1
-2
-3
-4
-5
-6
I
1
......•..•
•
-
-
"-
-
..
I
18
20
50 100
200
500 1 k
2k
5k 10k 14k 20k (Hz)
Tape: A-BEX TCC-262B/162B