Infinity MODULUS - R.A.B.O.S. Measurement Process

MODULUS PC BOARD REP A IR
In the event that the Modulus amplifier PC board is charred in the area of R27 &
R28 and the traces/connections on the board seem unrepairable, follow the
procedure below to repair such a unit:
1) Replace power resistors R27 & R28. (Infinity part number 280-CR5-820)
2) Inspect & test zener diodes ZD1 & ZD2. (Infinity part number 307-8126)
Replace if defective.
3) Refer to drawing below, making buss wire connections where noted.
4) Power up amplifier from cabinet power supply; check all DC voltages before
installation.
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Modulus