Mackie FAST RECOVERY M-1200, Руководство по обслуживанию

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M•1200/M•1400 SERVIC E MANUAL
SUMMARY O F FEATURES
4
SUMMARY O F FEATURES
FRO NT PANEL
1. G AIN
De te nte d g a in c o ntro ls a d just the le ve l se nt to e a c h o utp ut se c tio n. The g a in struc ture
is d e sig ne d so tha t a +4d Bu (1.23V rm s) inp ut sig na l d rive s the a m p lifie r to full ra te d
p o w e r into 4
Ω.
2. METERS
The M•1200/ M•1400’ s m e te rs ind ic a te the re la tive o utp ut le ve l o f the a m p lifie r
re fe re nc e d to full p o w e r. The SIG (sig na l p re se nt) se nse s the inp ut p rio r to the g a in
c o ntro l.
3. PRO TEC T
The Pro te c t LEDs lig ht ind ic a ting the c ha nne l ha s b e e n m ute d fo r o ne o f the fo llo w ing
re a so ns:
•
4 se c o nd turn o n d e la y
•
O utp ut d e vic e s b e yo nd Sa fe O p e ra ting Are a (SO A), a lso lig hts SHO RT LED(s).
•
He a tsink te m p e ra ture b e yo nd 80 d e g re e s C e lsius.
4. SHO RT
The Sho rt LEDs lig ht to sho w tha t the a m p lifie r ha s e ng a g e d p ro te c tio n d ue to a sho rt o r
lo w im p e d a nc e o n the o utp ut.
5. TEMP STATUS
The HO T LED lig hts to ind ic a te tha t the a m p lifie r ha s e ng a g e d p ro te c tio n d ue to
he a tsink te m p e ra ture o r p o w e r tra nsfo rm e r c o re te m p e ra ture .
6. PO WER SWITC H
This re m a rka b le d e vic e re q uire s ye a rs o f stud y to full c o m p re he nd .
OL
- 3
- 6
- 2
0
-3
-6
-9
- 2
0
SIG
O
L
SIG
CH
1
30
28
26
20
22 18
2
4
1
6
1
4
8
1.23v (+4dBu)
SENSITIVITY
GAIN /dB CH
2
PROTECT
COL
D
HOT
SHORT
TEMP STATUS
INTERNALSTATUS
CH
1
C H
2
CH
1& 2
O N
OFF
POWER
3v
2v
1v
3
0
2
8
2
6
2
0
2
2 1
8
24 16
14
8
1.23v (+4dBu)
SENSITIVIT
Y
GAIN /dB
3
v
2
v
1v
PROFESSIONAL POWER AMPLIFIER FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURRENT DESIGN
- 9
1 1 2 3 4 5 6