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SECTION FIVE _
Balanced Input Transformer Modules
nput transformer modules or Yamaha EM-150IIB,
Installation instructions for balanced i
EM-200B and EM-300B.
PARTS
IDENTIFICATION
Model BT-150:
6-channel balancing transformer module for EM-150IIB mixer.
Model BT-200:
8-channel balancing transformer module for EM-200B mixer.
Model BT-300:
12-channel balancing transformer module for EM-300B mixer.
NOTE:
A Model BT-150 may be used to balance the first 6 inputs of a Model EM-300B;
refer to the Special Instructions after the General Installation Procedure.
»n
GENERAL
INSTALLATION
PROCEDURE
Set the mixer down on a suitable work table. The unit
should be vertically oriented, resting on the rear-panel
power cord holder brackets. Orient the mixer so its
1.
bottom panel is facing you.
Remove the 4 phillips head screws that secure the trans-
former compartment access cover, and set the cover
aside. (Refer to Figure 1.)
Figure 2A .
Figure 2B
Figure 1 (EM-3008)
Remove the 28-pin jumper connectors" from their
sockets in the compartment. Save these connectors in
case you later wish to return the mixer to the unbal
anced configuration. (Refer to Figures 2A and 2B.)
*The EM-150IIB has only one jumper connector.
NOTE:
The 28-pin sockets are intentionally mounted
loosely so they "float", allowing for self-alignment
when the transformer module is installed.
DO NOT ATTEMPT TO TIGHTEN THE SOCKET
MOUNTING SCREWS.
19
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