Denon DN-951FA - Page 60

@ ON-95 1FA/961FA
4. Confirmation of HF Waveform
@ Connections
Note: Incase "—" terminal of the measuring equipment is grounded,
follow the connection shown under.
Oscilloscope
Oscilloscope
ovo
(Or chassis grounding)
@® Observe HF waveform on the scope.
@®
The
standard
amplitude
of
HF
waveform
is
1.1V.
If
it
is
less
than
0.8V,
please
replace
pick-up
as
it
is
defected.
5. Adjustment of Super Linear Converter
Adjustment of Super Linear Converter is only performed at a
time the DA Converter is replaced. ;
Note: For the above adjustment, DENON Audio Technical CD
(38C39-7174) must be used.
Adjustment Procedure
@® Connections
Connect the LINE OUT to a distortion meter through the
low-pass filter.
@ Playback a disc obtains 1kHz, OdB sine wave tone.
@ Adjust the VR3, VR4 and obtain minimum THD.
VRS irs ok aba Pesaran L-channe!
MRA dbnestoreiacd sbecre wove te R-channel
THD standard is less than 0.008%
VR3 ~=VR4
6. Output Level Adjustment
1. Connect VTVM to the output connector of DN-951FA/961FA
Use 1:1, 600-ohm Audio Transformer between the unit and VTVMs in order for matching the unbalanced input of VTVM and the
active balanced output of DN-951FA/961FA.
4:1
DN-951FA/961FA\
LINE OUT
OO
VTVM
(LEVEL METER)
AUDIO
TRANSFORMER
Connection for Output Level Adjustment
2. Turn the power switch on.
3. Set Track Number "49", and press PLAY/PAUSE ( > ) button.
4. While reading VTVM indication, adjust VR1 (L-ch) and VR2 (R-ch) so that the output level attains +18 dbm (or desired level).
Note: For the above adjustment, DENON Audio Technical CD (38C 39-7174) must be used.
Playback of Track Number "49" compietes in a short duration. If the pick-up is moved to the next track, press STANDBY/CUE
(I4 ) button, then PLAY/PAUSE ( > ) button to repeat the adjustment on the Track Number "49".
REAR PANEL
VR1 VR2
(L-CH) (R—CH)
Location of Output Level Adjustment VRs