TOA Electronics 1000 Series - Manual (Page 9)

Optional Matching Transformer Mounting
[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 E-1231's input and output are electronically balanced. These can be converted to
transformer balanced input and output using the optional matching transformer LT-101
(input) and LT-102 (output).
1. Set the power switch to OFF and unplug the AC cord form a wall outlet.
2. Remove the case by loosening six side panel screws (three each on each side)
and two rear panel screws.
3. Install sleeves (supplied with the transformer) by tightening screws from the other
side of a chassis, and mount the transformer to the sleeves using screws. See Fig.
1.The input transformer must be located on the left and the output transformer on
the right.
4. When mounting the input transformer, detach connector from CN-104, reconnect
the detached connector to connector at the transformer side, and then connect
connector from the transformer to CN104.
When mounting the output transformer, detach
connector from CN-103,
connector at the transformer side, and then
connector from the transformer to CN103.
reconnect the detached connector to
See Fig.1.
connect
Fig.1
5. Fit the case in place.
Transformer Specifications
Model
Frequency response
Constant loss
Distortion
LT-101
30Hz ~ 20kHz
(at ±0.15dB)
Within 1.5dB(at 1kHz)
Less than 0.2%(50Hz/5dB)
LT-102
30Hz ~ 20kHz
(at ±0.15dB)
Within 1.5dB(at 1kHz)
Less than 0.2%(50Hz/5dB)
0dB = 0.775V RMS
Specifications are subject to change without notice.
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