Altair DA-240, Руководство пользователя

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12 DISTRIBUTION UNIT DA-240
OUTPUT TRANSFORMER (OT-DA)
In order to make a galvanic isolation with the next part of the audio system, it is available an
output transformer.
Each two XLR-3-32 output has an insert point for the output transformer; therefore, you could
mount twenty output transformers in the unit. In the following table are shown the correspondence
between the outputs and their corresponding outputs transformers and the resistors that you must
remove to place the output transformer.
OUTPUTS TRANSFORMER POSITION RESISTORS TO REMOVE
1 and 11 - L TR1 — UPPER BOARD R2, R3, R4 and R18 — UPPER BOARD
21 and 31 — L
TR1 — LOWER BOARD R2, R3, R4 and R18 — LOWER BOARD
2 and 12 — R
TR2 — UPPER BOARD R15, R16, R17 and R32 — UPPER BOARD
22 and 32 — R TR2 — LOWER BOARD R15, R16, R17 and R32 — LOWER BOARD
3 and 13 - L
TR3 — UPPER BOARD R29, R30, R31 and R46 — UPPER BOARD
23 and 33 — L
TR3 — LOWER BOARD R29, R30, R31 and R46 — LOWER BOARD
4 and 14 — R
TR4 — UPPER BOARD R43, R44, R45 and R60 — UPPER BOARD
24 and 34 — R
TR4 — LOWER BOARD R43, R44, R45 and R60 — LOWER BOARD
5 and 15 - L
TR5 — UPPER BOARD R57, R58, R59 and R74 — UPPER BOARD
25 and 35 — L
TR5 — LOWER BOARD R57, R58, R59 and R74 — LOWER BOARD
6 and 16 — R TR6 — UPPER BOARD R71, R72, R73 and R88 — UPPER BOARD
26 and 36 — R
TR6 — LOWER BOARD R71, R72, R73 and R88 — LOWER BOARD
7 and 17 - L
TR7 — UPPER BOARD R85, R86, R87 and R102 — UPPER BOARD
27 and 37 — L TR7 — LOWER BOARD R85, R86, R87 and R102 — LOWER BOARD
8 and 18 — R
TR8 — UPPER BOARD R99, R100, R101 and R116 — UPPER BOARD
28 and 38 — R TR8 — LOWER BOARD R99, R100, R101 and R116 — LOWER BOARD
9 and 19 - L
TR9 — UPPER BOARD R113, R114, R115 and R130 — UPPER BOARD
29 and 39 — L TR9 — LOWER BOARD R113, R114, R115 and R130 — LOWER BOARD
10 and 20 — R
TR10 — UPPER BOARD R127, R128, R129 and R140 — UPPER BOARD
30 and 40 - R
TR10 — LOWER BOARD R127, R128, R129 and R140 — LOWER BOARD
In the following picture is showing the placement of the output transformer TR1 corresponding to
the outputs 1 and 11 - L. It is important to keep in mind the placement of the output transformer pins
so that they coincide with the main board (seven to the top and six to the bottom).
Remove the resistors corresponding to the output transformer. In
this case R2, R3, R4 and R18.
Place the output transformer, keeping in mind the position of their
pins (seven to the top and six to the bottom), and solder it to the main
board.