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K2 K3 | SERVICE MANUAL
To remove the amp control board please proceed in
discharging the power supply’s capacitors bank as
explained in chapter 3.
Remove the 3 screws higlighted in (Fig. 74)
10. Removing the control board (K-CNTRL):
Extract the amp board with care.
Once the control board is replaced, it is mandatory to reinstall the rmware as illustrated in chapter 8.
(Fig. 74)
CNTRL Board LEDs
(Fig. 75)
Go to Menu → Settings → amplier setting → Max
output voltage and set the proper max output voltage.
Check and set the max output voltage according to the
following table
Go to: Menu → Setup → Service and insert the Service
password.
With a variac set the AC mains at 230 V
AC
and calibrate
the mains:
for 220/230 V AC mains press the VMains Cal HIGH and
insert the value read with the voltmeter (Fig. 75)
With a variac set the AC mains at 115 V
AC
and calibrate
the mains:
for 110/120 V AC mains press the VMains Cal LOW and
insert the value read with the voltmeter
Be careful not to modify any other parameters in
the service menu, if this happens malfunctions or
damage could happen!
Exit from the service menu.
Check the mains, you should read the mains voltage with
a tolerance of 5%.
Turn the amplier OFF and then ON.
Check the values of the VMains calibration shown on the
display.
Amp Model Peak output voltage (V)
K2 140
K3 165
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