Channel Faders And Pots; 1} Channel Faders - Tascam M-300 Series Operation & Maintenance Manual

1-4. CHANNEL FADERS AND POTS

I nput Channel Sections of the 300 Series Mixers
are all identical. TAPE I Ns 1 -8 are internally
connected to L I N E I N s 1 ·8 and disconnected
when 1 /4" phone plugs are inserted to Ll NE
I Ns.
1) Channel Faders (INSERT .... D.OUT)
Connect a - 1 0 dBV, 1 kHz signal to the channel
I NS E RT jacks and set the channel faders for a
- 1 0 d8V reading at D.OUT. Confirm that
setting of the faders to the shaded area (be·
tween 7-8 on the scale) provides a -1 0 d8V
output.
2) TRIM-LINE Port ( L I N E I N .... D.OUT)
Connect a - 1 0 dBV, 1 kHz signal to L I N E I N .
Press the L I N E switch to select the L I N E I N
signal. Adjust the T R I M- L I N E pot for a -1 0 dBV
reading at D.OUT.
3) EQualizer ( L I N E I N -> D.OUT)
Connect a -10 dBV, 1 kHz signal to L I N E I N
and press the E O O N switch. Read the levels
at D .OUT while turning the GA I N knobs of the
three sections ( H I G H , M I D and LOW) . If the
readings vary approx.
- 1 0 dBV nominal level, the EO electronics
are considered normal.
4) AUX 1 and AUX 2 Level Pots
(LINE IN -> AUX 1 , AUX 2 OUT PUTs)
Connect a -10 d BV, 1 kH z signal to L I N E I N
and press the AUX 1 L I N E switch. Confirm that
AUX 1, 2 O UTPUTs provide nominal levels
(O dBu at 1 /4" phone jacks, -10 dBV at RCA
phono jacks) when the AUX 1 , 2 level pots are
set to the max. position or fully right.
5) E F F ECT Sand Control (LINE IN .... E F F ECT
OUTPUT)
Connect a - 1 0 dBV, 1 kHz signal to the L I N E
I N jacks and press the channel O N switches.
Confirm that setting of the E F F ECT send
control to maximum provides nominal levels to
the E F F ECT OUTPUT ( 0 dBu at 1 /4" phone
jacks, -10 dBV at RCA jacks).
6) TRIM-MIC Pot ( M I C IN .... D.OUT)
Disengage the L I N E switch to select the M I C
I N signal. Connect a -60 dBV, 1 kHz signal to
M I C IN and adjust the TR I M -M I C pot for a
-10 dBV reading at D.OUT ( T R IM-MIC control
range is 45 d B approx.).
1 5 dB in regard to a
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