ALLEN & HEATH DL1000, Руководство по обслуживанию

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series 11
Removing The Amplifier PCB (DP1000) cont.
4) Remove the plastic snap-in rivets from the rear Speakon
®
connectors (see fig.9)
5) The Amplifier circuit board assembly and connecting Heat-sink can now be removed from the
console, but remains attached to the transformer and earth post.
6) If replacing the Amplifier circuit board assembly then de-solder the transformer wires and green
earth wire from the left earth post (see fig.3) at the PCB.
When all service work is complete, remove all debris such as solder, component legs and wire clippings
from inside the unit and check your work carefully before re-assembly. To refit the Amplifier circuit board
assembly, follow the above procedure in reverse order. Make sure all harnesses are aligned and
plugged on. Test for correct operation.
Torque measurement for power components
When replacing any of the 8 power transistors seated on the heat-sink, it is necessary to tighten the
fixing nuts using a torque wrench to
1N/m (one Newton metre).
Plastic Snap-In Rivets
fig.9