Toa W-912A Service Manual - Manual (Page 16)

133-21-577-7B
URL: http://www.toa.jp/
13. BLOCK DIAGRAM
+24 V DC
#1
Module
Input Ports
–20 dBV
(100 mV)
10 k
Ω
#5
#6
Mute
0 dBV = 1 V = approx. 2 dBm
Bridging In/Out
–20 dBV, 3.3 kHz
2
B
Relay
Master
Volume
Control
on
off
on
off
High-pass filter
(180 Hz, 12 dB/Oct.) Low-pass filter
(7 kHz, 12 dB/Oct.)
Equalizer
Out
EQ
In
Compressor
(Limiter)
off
COMP.
Equarizer Control
63 Hz – 16 kHz Release
Time Compressor
(Limiter)
Control
Power
Indicator
+Vcc
–Vcc
+24 V DC 250 V
1 A
PT
AC
Fuse
Power
Switch
AC 120 V
60 Hz
Protecting Circuit
• Output Muting
• DC Drift
Speaker
Output
Terminal
Relay
Peak
Indicator
Output
Fuse
Low-cut
(60 Hz, 6 dB/Oct.)
Power
Amp.
Thermostat 105∞C
1
A
OT
Balanced
Transformer
Output
8
Ω , 25 V, 70 V
Unbalanced
Direct Output
4
Ω
• Accessories
Flush-mounting (in-wall) back box: BX-9F
Surface-mounting (on-wall) back box: BX-9S
Expanding kit:
WE-2
Volume control cover (black): YA-910
• Optional products
Volume control cover YA-910 ................... 3
Key (for door) ............................................ 2
Lift-off hinge (receptacle) .......................... 2
Machine screw M4 x 10* ........................... 5
Machine screw M3 x 6 .............................. 6 Machine screw M3 x 10 ............................ 4
Flange nut for M3 ...................................... 4
Tapping screw 3 x 8 .................................. 4
Inch screw ................................................. 4
Indication label .......................................... 1
* Three screws are actually used and extra two are spare.