Toa W-912A Service Manual User Manual
New 900 series, Service manual, Table of contents caution
SERVICE MANUAL
NEW 900 SERIES
IN-WALL MIXER POWER AMPLIFIERS
W-906A
W-912A
INPUT 1
POWER
ON
250V 3A
250V 6A
OFF
OFF
MAX
INPUT 2
INPUT 3
AC FUSE
OFF
ON
LOW PASS
OFF
ON
HIGH PASS
OUT
63
125
250
500
1k
2k
4k
8k
16k
63
125
250
500
1k
2k
4k
8k
16k
IN
EQUALIZER
OUTPUT FUSE
COMPRESSOR
INPUT 4
INPUT 5
INPUT 6
MASTER
12
6
0
6
12
12
6
0
6
12
900 SERIES
WALL AMPLIFIER
POWER
PEAK
1. IMPORTANT SAFETY INSTRUCTIONS ...... 2
2. SAFETY PRECAUTIONS ............................. 3
3. GENERAL DESCRIPTION ........................... 5
4. FEATURES ................................................... 5
5. NOMENCLATURE AND FUNCTIONS
Front .............................................................. 6
Front (viewed with the front cover removed) ... 7
6. INSTALLATION PRECAUTIONS ................. 8
7. INSTALLATION AND CONNECTION .......... 9
8. SERVICING ................................................ 12
9. OPERATION .............................................. 13
10. VOLUME CONTROL COVER ATTACHMENT .. 14
11. OUTPUT EQ CHARACTERISTIC ............. 14
12. SPECIFICATIONS ..................................... 15
Accessories ................................................ 16
Optional products ....................................... 16
13. BLOCK DIAGRAM .................................... 16
TABLE OF CONTENTS
CAUTION
These servicing instructions are for use by qualified service personnel only.
To reduce the risk of electric shock, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so.