Installing A New Tube - Acom 1500 Replacement Manual

Unclip the anode spring clip from the tube cap - look at the yellow arrow (2)
above - and then unthread the rubber chimney out of the anode heat sink (together
with the anode spring clip inside). Keep an eye on the temperature sensor.
While holding the tube for the heat sink, turn it to 120° (a third of a full turn)
and counter clockwise, in order to release the tube from the socket spring
contacts. Be sure to avoid overstraining the contacts while pulling the tube
vertically up until you get it out of the socket.

5. Installing a New Tube

Observe the key cog inside the tube leading hole and three 120°- spaced grooves on
the socket central guide pin:
Orient the tube so that the cog matches any one of the three grooves. Slide the
tube down gently while preserving the socket's spring contacts from any
overstrain.
If needed, turn the tube slightly in both directions in order to feel the 120°
contacts gap and fit it between the socket spring contacts. Then align the tube
vertically by sliding it slightly up or down, in small steps, until its radial
contacts find their way between socket spring contacts, and only then turn the
tube harder and 120° (a third of a full turn) clockwise until you feel a firm
stop.
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