Toa M-243 User manual

OPERATING INSTRUCTIONS
STEREO MIXER M-243
CAUTION
TO REDUCE THE RISK OF ELECTRICAL
SHOCK, DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
THE LIGHTNING FLASH WITH
ARROWHEAD WITHIN A TRIANGLE IS
INTENDED TO TELL THE USER THAT
PARTS INSIDE THE PRODUCT ARE A
RISK OF ELECTRIC SHOCK TO
PERSONS.
THE EXCLAMATION POINT WITHIN A
TRIANGLE IS INTENDED TO TELL THE
USER THAT IMPORTANT OPERATING
AND SERVICING INSTRUCTIONS ARE
IN THE PAPERS WITH THE APPLIANCE.
TABLE OF CONTENTS
HANDLING PRECAUTIONS
GENERAL DESCRIPTION
FEATURES
NOMENCLATURE AND FUNCTIONS
INTERNAL SWITCH SETTINGS
BLOCK AND LEVEL DIAGRAM
DIMENSIONAL DIAGRAM
SPECIFICATIONS
Please f ll w the instructi ns in this manual t btain the ptimum results fr m this unit.
We als rec mmend that y u keep this manual handy f r future reference.
TOA C rp rati n
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1. HANDLING PRECAUTIONS
Operating v ltage range is AC mains ±10% (50/60Hz).
Keep c rr sive chemicals and beverages away fr m the unit as they may be spilt.
When any irregularity is f und, be sure t c ntact y ur nearest TOA dealer. Make n further attempt t use
the unit t av id electrical sh cks.
2. GENERAL DESCRIPTION
The TOA M-243 is a 19" rack m untable (1 unit size) stere mixer that c mes with tw m naural inputs, f ur
stere inputs, ne stere utput and tw m naural utputs.
3. FEATURES
Tw m naural inputs, f ur stere inputs, ne stere utput, and tw m naural utputs. Each input signal
can be assigned t three utputs.
Sub-input f r each bus line t the stere utput and tw m naural utputs.
Micr ph ne input r line input selectable f r m naural input depending n the signal level. Internal limiter
minimizes signal dist rti n due t excessive input. Internal switches perate a high-pass filter functi n in the
input circuit, and a pad (20dB) functi n in the micr ph ne input.
Signal clip indicat r.
Aut matic muting functi n (can be switched n and ff) detects the m naural input signal and aut matically
mutes the stere utput signal.
Stere utput has a rec rding utput and equalizers f r high and l w frequencies.
Tw m naural utputs als functi n as stere sum utputs by internal switch setting.
Assign butt n c ver serves as a writing bl ck.
Kn bs supplied in different c l rs f r easy ass ciati n with their respective c ntr ls.
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4. NOMENCLATURE AND FUNCTIONS
[Front P nel]
Input level c ntr ls [1-6] (1-2 : M naural input,
3-6 : Stere input)
These c ntr ls adjust the input level f each
channel.
Assign butt ns [ST, 1, 2]
These butt ns select the utput t which the
p st-input level c ntr l signals are delivered.
ST : Stere utput
1 : MONO 1 utput
2 : MONO 2 utput
Assign butt n c ver
This c ver pr tects the assign switch setting
fr m accidental change. It can als be used as
a writing bl ck.
Clip indicat r [PEAK]
This lamp lights when the signal reaches 3dB
bel w clipping. Adjust the signal level using
individual input level c ntr ls s that this lamp
lights nly accidentally.
Mute ON/OFF butt n [AUTO MUTE]
This butt n turns n the muting facility when
pressed. (The muting indicat r will light.) By
detecting the signal assigned t the stere
utput fr m channel 1 r 2, the signal assigned
t stere utputs fr m channel 3 thr ugh
channel 6 is muted. (The signal assigned t the
m naural utput is n t muted.)
Equalizer c ntr ls [EQ : LOW, HIGH]
These c ntr ls adjust stere utput signal t ne.
LOW : L w frequency adjustment
(20Hz, ±15dB shelving)
HIGH : High frequency adjustment
(20kHz, ±15dB shelving)
Stere utput level c ntr l [STEREO]
This c ntr l adjusts a stere utput level.
M naural utput level c ntr ls [MONO 1, 2]
These c ntr ls adjust each m naural utput
level.
P wer butt n and p wer lamp [POWER]
This butt n switches p wer n (the p wer lamp
lights) and ff (the lamp is extinguished).
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[Re r P nel]
F r technical details f each input and utput, refer t the secti n "8. SPECIFICATIONS".
M naural input terminals (1,2) [MIC, LINE]
Select either MIC r LINE f r c nnecti n. If b th are c nnected, LINE input takes precedence.
Stere input jacks (3-6) [L , R]
Only CH6 RCA jacks are c nnected in parallel with ph ne jacks.
Stere sub-input terminals [SUB IN STEREO L / M, R]
Signals fr m these terminals are assigned t stere utput buses that g t the stere utput. C nnecting
nly "L" will input t b th "L" and "R".
M naural sub-input terminals [SUB IN MONO 1,2]
Signals fr m these terminals are assigned t m naural utput buses that g t m naural utput 1 and 2.
Rec rding utput jacks [REC L , R]
These stere rec rding jacks utput the signal fr m the stere utput bus.
Stere utput jacks [STEREO OUT L , R]
M naural utput jacks [MONO OUT 1, 2]
These jacks als functi n as stere sum utputs by internal switch setting. (Refer t the secti n
"5. INTERNAL SWITCH SETTINGS".)
AC inlet
C nnect the supplied p wer c rd t this inlet.
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5. INTERNAL SWITCH SETTINGS
[CAUTION]
THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID
ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE
OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER ALL SERVICING TO
QUALIFIED SERVICE PERSONNEL
The M-243 mixer enables the f ll wing functi ns by setting internal switches.
(1) [PAD switch]
Setting this switch t IN p siti n will place a pad (20dB) in the m naural input (MIC input).
(2) [HPF switch]
Setting this switch t IN p siti n will place a high-pass filter (300Hz, -6dB/ ct) in the m naural input.
(3) [GND switch]
Setting this switch t LIFT p siti n will cut a gr und l p which generates n ise.
(4) [MONO1] nd [MONO 2] switches
Setting each switch t ST SUM p siti n will change each m naural utput t stere sum utput.
How to open the mixer c se <Switch loc tion>
Rear Panel
1. Set the p wer switch t OFF and unplug the p wer c rd fr m
a wall utlet.
2. Rem ve case fixing screws (10 places).
4 each at left and right m unting brackets = 8
1 each at b th sides (back f side panel) = 2
3. Rem ve the case.
4. Replace the case after setting change c mpleti n.
[Prec utions] Fr nt Panel
T av id electrical sh cks and equipment failures, d n t t uch the internal c mp nents ther than switches.
Each internal switch is fact ry-preset t the reverse directi n f that which is indicated ab ve by the arr w.
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6. BLOCK AND LEVEL DIAGRAM
7. DIMENSIONAL DIAGRAM
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8. SPECIFICATIONS
Inputs nd Outputs
N menclature
CH1, CH2
(MONO
INPUT)
MIC
MIC (PAD)
LINE
CH3~CH6
(STEREO INPUT L, R)
SUB
INPUT
STEREO
(L/M, R)
MONO
(1,2)
STEREO OUTPUT
(L,R)
MONO OUTPUT
(1,2)
REC OUTPUT
(L,R)
Rated level
- 6 0 dB*
-40dB*
- 1 0 dB*
- 10dB*
+4dB*
+ 4dB*
+4dB*
+4dB*
- 1 0 dB*
Maximum level
- 3 0 dB*
- 10dB*
—
—
+20 d B*
+20 dB*
+20 dB*
+20 dB*
+6dB*
Impedance C nnect r type
XLR TYPE
(ELECTRICAL BAL)
PHONE (UNBAL)
RCA PIN (UNBAL)
(CH6••••& PHONE)
PHONE (UNBAL)
PHONE (UNBAL)
PHONE (UNBAL)
PHONE (UNBAL)
RCA PIN (UNBAL)
* 0dB=0.775Vrms
Gener l Specific tions
Frequency Resp nse
T tal Harm nic Dist rti n
N ise Level
(A-Weighted)
P wer Requirement
P wer C nsumpti n
Dimensi ns
Weight
Finish
Standard Access ries
20 Hz -20 kHz (+1,-2dB)
Less than 0.01% (1 kHz , rated input/ utput)
ALL MIN.
STEREO OUT (L, R) : - 105 dB*r less
MONO OUT (1,2) : - 98 dB
*
r less
STEREO, MONO 1 , 2 MAX.
STEREO OUT (L , R) : - 94 dB
*
r less
MONO OUT (1,2) : - 95 dB* r less
AC mains
120 V versi n : 10 W, 220-240 V versi n : 12 W
482.6 (W) x 44.0 (H) x 301.8 (D) mm
19 (W) x 1.73 (H) x 11.88 (D) in.
3.8kg (8.38 Ib.)
Black
Rack-m unting screw 4 Kn b(blue, small)
Rubber f t 4 Kn b(red, small)
Operating instructi ns 1 Kn b(blue, large)
Kn b(red, large)
2
2
2
2
*0 dB=0.775 V rms
Specificati ns are subject t change with ut n tice.
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TOA C rp rati n Printed in Japan
133-12-225-10
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