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INPUT 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 M-1264's (M-1212E's) monaural inputs are electronically balanced.
They can be made transformer-balanced inputs using the optional input transformer LT-101 or LT-102.
How to mount the input transformer
Set the power switch to OFF and remove the power cord from a wall outlet.
Remove the unit's case by loosening six side panel screws (three each on both sides) and two rear panel
screws.
Fix two sleeves to the bottom chassis using screws, then mount the transformer to the sleeves using other
screws. (The sleeves and screws are supplied with the transformer.) When stacking two transformers due to the
number or arrangement of channels, use the sleeves supplied with the M-1264 (M-1212E).
When changing the inputs 1, 3, 5, etc. located in the upper section, detach connector from CN-104 connector,
connect the detached connector to the transformer connector , and connect the transformer lead to the
CN-104. When changing the inputs 2, 4, 6, etc. in the lower section, detach connector from CN-105 connector,
connect the detached connector to the transformer connector , and connect the transformer lead to the
CN-105.
Replace the case.
MONO INPUT
CH-1 (CH-2)
[Note] *1: For the upper inputs.
*2: For the lower inputs.
Top view
Bottom chassis
Sleeves supplied with
the M-1264 (M-1212E)
Sleeves supplied
with the optional
transformer
Side view