Marantz 3600 - High Level Separation; Filters; Tone Control

10
HIGH LEVEL SEPARATION
1.
Connect generator to left channel AUX
INPUT. Insert a 600-ohm phono shorting
plug into right channel AUX INPUT.
Monitor signal at PREAMP OUTPUT with
AC VTVM.
. Set generator frequency at 20 Hz. Set
generator level for O dB, 3 V rms output
as indicated on the VT VM.
. Observe the output of the undriven chan-
nel on the VTVM. Output should be at
least 40 dB below the O dB reference level
indicating a 40 - dB left - to - right channel
separation. Repeat test on right channel.
FILTERS (Figure 7.)
1.
Connect generator to AUX INPUT. De-
press AUX Selector pushswitch. Connect
AC VTVM to PREAMP OUTPUT.
. To establish a reference level, set genera-
tor frequency to 1 kHz, 0 dB as measured
on the VTVM.
. Depress 9 kHz FILTER Switch. With
oscillator switched to 9 kHz input, out-
put level should drop 3.0 dB (+ 1.25dB).
Depress and release F|LTER switch.
Depress 5 kHz FILTER Switch. With
oscillator switched to 5 kHz, output
should drop 3 dB (+ 1.25dB). Depress
and release FILTER Switch.
Depress 30 Hz FILTER Switch. With
oscillator switch to 30 Hz, signal should
drop 3 dB (+ 0.75 dB). Depress and
release FILTER Switch.
TONE CONTROL (Figure 8.)
1
. Set generator to 100 Hz.
. Connect generator to AUX INPUT. De-
press AUX Selector pushswitch. TONE
Control should be set to OUT. Connect
AC VTVM to PREAMP OUTPUT.
. With VOLUME Control set to maximum,
set generator output level for 0 dB, 3 V
rms indication on VTVM.
. Set TONE switch to IN and center TONE
controls. Output should remain O aB.
. Sweep from 20 Hz to 20 kHz. Frequency
response should be flat (+ 0.25 dB) at all
audio frequencies.
Slide BASS
Tone Control up to maximum boost
position. Output level should increase
10 dB (+ 2 dB) as measured on VTVM.
Slide BASS Control down to maximum
cut position. Output should decrease to
10 dB (+ 2 dB) below O dB reference level.
Center BASS Control.
. Set generator to 1 kHz. Slide M!D Con-
trol up to maximum boost and observe
for an increase of 8.5 (+ 2 dB}. Slide
MID Control down to maximum cut
and observe for a decrease of 8.5 dB
(+ 2 dB) below O dB reference level.
Center MID Control.
. Set generator to 10 kHz. Slide TREBLE
Control up to maximum boost. Output
should increase 10 dB (+ 2 dB}. Slide
control down to maximum cut and observe
for a 10 dB + 2 dB decrease below 0 dB
reference level. Center TREBLE Control.