Denon AVC-3000 - Page 39

AVC-3000/3000G mmm
ADJUSTMENT
Master VR
Input
Output
Idiling
Current
(1U-1966-1)
8 FS z L Arrangement
5
e
=
(Left)
(1)
Avoid
direct
below
from
a
coller
or
an
electric
fan,
and
adjust
the
unit
at
normal
room
temperature
15°C
~
30°C.
=
a
g
x
c
(59°F
~
86°F).
ag s (Center)
< R Center level VR R (2) Presetting
(Right)
@
POWER
(Power
source
switch)
—>
OFF(SL)
p
@
VOLUME
(Volume
control)
—
0
fully
counterclockwise
(
¥
min.)
Rear
level
@
TONE,
BASE,
TREBLE,
FRONT
BALANCE
and
INPUT
BALANCE
controls
to
center.
Test
tone
volume
—
@
SPEAKERS
(Speaker
terminal)
|
—
No
load
(Do
not
connect
speaker,
dummy
resistor,
etc.)
generator control (Rear)
Figure
4
Adjustment
(1) Remove top cover and set VR103 (Lch), VR104 (Rech) of 1U-1966-1, to counterclockwise end position.
(2) Connect DC Voltmeter across Lch L T.P.1 and Rch R T.P.2, which are the test points.
(3) Connect power cord to AC line, and turn power switch "ON" ( m=)". Allow a minute, and turn VR103 and VR104 clockwise
( Y) and adjust the TEST POINT voltage to 3+ 1 mV DC.
(4) Allow 2 minutes, and adjust the VR103 and VR104 so that the meter reads 5.5 + 1 mV DC.
(5) Allow 10 minutes, and adjust the VR103 and VR104so that the meter reads 5 + 1 mV DC.
. R
LN Fron
26~40dB
40dB ‘,
N
2 reer AZ
L(S) R
Volume when
L=R
DC voltmeter
Figure 5 Figure 6 Figure 7
Dolby surround decoder Dolby pro-logic surround decoder Dolby pro-logic surround decoder
(Passive decoder) {Active decoder) (Active decoder)
Sh
7
Confirm Pro-logic circuit function
Confirm correct pro-logic circuit function with input signal shown table below.
@ Measurement : Apply the correct input signal, and adjust level VR of master, center and rear, so that the level falls
approximately within “ level, respectively.
eo ag ge
L ch only
1U-1966-3
1U-1966-2
“aw :
(a) Below -20 dB
1U-1966-4
Fi (Normally approximately -26 ~ -42 dB)
; R chonly Same as (a)
;
g
*
0
dB
(1
kHz)
; 8 :
i & Below -20 dB/approx. - 6dB IU~!966=1
4 L=R * 0 dB/approx. -3 dB 0 dB /0. dB
; Same phase Below -20 dB /approx. 648
i signal
L=-R
Both CHs
Reversed
phase signal = =
8 | BothCHs’ Same as (a)
§ | Rreversed
[phase inal] §
Table 3
47