Revision as of 18:15, 15 May 2018

EPower module (top view)

EPower module (bottom 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

The author has made every effort to make the module as reliable and safe to use as possible. However,

You make any modifications inside of your equipment at your own risk !

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

Installing the module

Module fitting

The module pins are matched to holes after the components:

• D2 (both holes),
• TR3 (ground),
• C8 (+9V),
• U21 (output +12V).

Links

Thread on the Enterprise Forever forum Enterprise Power module - EPower