EPower

EPower module (top view)

Brief information

The EPower module replaces the original Enterprise power circuits.

Specification

The module has three power sources:

• 12 V @ 0.7 A,
• 5 V @ 1.5 A channel A,
• 5 V @ 1.5 A channel B.

The current limitation of the 5 V stabilizer is set at 3.7 A [I = 37125 / R1] (the maximum possible current is 7 A, if need, but it could damage the circuitry of the computer).

Maximum values (limited by permissible current of the power filters) are:

• 12 V @ 1.2 A,
• 5 V @ 2.5 A per channel (both 5A+5B @ 4.5[A]).

This is much more than the original power source (12[V] @ 0.15[A] and 2x 5[V] @ 1[A]).

How to install

What you need

• EPower module
• screwdriver
• soldering iron
• tin extractor
• solder tin
• pliers

Enterprise mainboard preparation

Desoldered components

Remove these components

The following components should be desoldered from the motherboard:

• C8 (100 µF)
• C9 (100 µF)
• C10 (100 µF)
• C11 (100 µF)
• C12 (100 µF)
• D2 (1N4001)
• D3 (1N4001)
• D4 (1N4001)
• L1 (coil)
• U19 (LM7805)
• U20 (LM7805)
• U21 (LM78L12)
• TR2 (BC337)
• TR3 (BC212)
• R13 (100 Ω)
• R14 (10 Ω)
• R15 (1.5 kΩ)
• R16 (3.9 kΩ)

Prepared mainboard

Links

Thread on the Enterprise Forever forum Enterprise Power module - EPower