FM Towns:Tower Power Supply Repair and Capacitor list

The Generation 1 Power Supply

Generation 1 PSU card.

This power supply is not known to be a tremendous source of pain to maintain.
However, it is sideways just like the Gen 2/3/4 cards.

Gen 1 Card

Capacitor	Microfarad	Voltage
C6	680uF	180v
C52	560uF	25v
C57	2200uF	16v
C60	220uF	50v
C61	330uF	16v
C70	22uF	25v
C74	22uF	25v
C75	22uF	25v
C54	220uF	25v
C55	220uF	25v
C58	820uF	10v

The Generation 2/3/4 Power Supply

Look in the red boxes. Large failure points. Resistors and tantalum capacitors near these areas also like to break.

Very well known and the pain these cause is also well known. This PSU card is sideways like the Gen1 card.
As a result of this, the acid leaks sideways down the card and destroys a lot of resistors, the relay, etc. It is uncommon to clean, recap, and then the PSU card dies months later.
Hearing a whining sound when the computer is plugged in and not turned on is an indicator that the capacitor near the black relay has leaked badly.
You can get a capacitor kit for this power supply at console5.

Gen 2/3/4 Card

Capacitor	Microfarad	Voltage
C6	560uF	180v
C12	47uF	50v
C52	560uF	25v
C54	220uF	25v
C55	220uF	25v
C57	2200uF	10v
C58	820uF	10v
C60	220uF	50v
C70	22uF	25v
C74	22uF	25v
C75	22uF	25v
C84	1uF	50v