Removing the front panel of ACOM 2000A
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1.
Safety first. WARNING HIGH VOLTAGE!
The amplifier works with voltages up to 3000 Vdc, which are
LETHAL!
You must unplug the
amplifier from the line (mains) wall outlet and
WAIT AT LEAST 30 minutes
before removing the
cover of the amplifier. Do not touch any part inside before you safe proof the amplifier as described
below because some residual voltages may still be present.
Please read the whole instruction below before to start.
If you don’t feel comfortable with
amplifier repairs or you are not sure about your safety, we recommend that you entrust
the following operations to your dealer.
Unplug the amplifier from the line (mains) wall outlet. Disconnect all cables from the amplifier
(grounding last).
Wait at least 30 minutes before to continue.
2. Removing the top cover and safe proofing the amplifier.
Use a Philips-2 screwdriver. Do not press the screws excessively in order not to push any captive
nut out of the chassis. Unscrew 17 flange-button head screws on top and 2 x 6 pcs on each side.
Do not unscrew the 8 protective grid screws in the tubes air-exhaust area. Remove the top cover.
Check whether the High Voltage Crowbar (located on the middle chassis wall
– see fig.1 below)
does reliably short-circuit its center screw to the chassis when the top cover is removed. It must
keep the HV wiring bypassed to the chassis always when the top cover is missing during all your
operations - fig.1:
Fig.1 High Voltage Crowbar
PLEASE DO NOT PROCEED if you don't feel comfortable with handling HIGH VOLTAGE
circuits! Contact your nearest dealer for an advice!
Carry out the following safety procedure of discharging the HV capacitors inside the amplifier
immeditely after having opened the top cover of the amplifier.
Summary of Contents for Acom 2000A
Page 6: ......
