11
Fit the main PCB to the case with the IP
+
and IP
-
terminals
closest to the front panel. Fit M3 x 12 bolts into 5mm spacers
under the PCB. Then offer up the PCB to the case and secure the
spacers with M3 serrated washers and nuts under the case.
Wire the Green cable from the Earth terminal to the GND2 pin on
the far end of the PCB. Solder a 180mm length of Green cable
from the terminal pin GNDL to the nearest screen tag on the rear
of the output transformer. Link all the screen terminals on both
output transformers from this tag with tinned copper wire and
Green cable.
IMPORTANT
–
Check with a multimeter switched to Resistance that
pins GNDL, GNDR and the screen tags of both transformers have
good continuity to the Earth Terminal.
Solder the red cable from the positive terminal of the power
supply capacitor to the HT terminal of the nearest (Left
Channel) transformer and, using a length of Red cable link this
with the HT terminal of the other (Right Channel) transformer.
Using short lengths of red cable link the HT terminals of both
transformers to their corresponding HT PCB pins
–
“
HT
”
for the
Right Channel transformer and
“
HT1
”
for the Left.
WDPre3 Kit Assembly Instructions
FITTING THE PRE3 PCB
Fig. 10
Fig 10. Transformer Screen Links
Fig. 11
11
Fit the main PCB to the case with the IP
+
and IP
-
terminals
closest to the front panel. Fit M3 x 12 bolts into 5mm spacers
under the PCB. Then offer up the PCB to the case and secure the
spacers with M3 serrated washers and nuts under the case.
Wire the Green cable from the Earth terminal to the GND2 pin on
the far end of the PCB. Solder a 180mm length of Green cable
from the terminal pin GNDL to the nearest screen tag on the rear
of the output transformer. Link all the screen terminals on both
output transformers from this tag with tinned copper wire and
Green cable.
IMPORTANT
–
Check with a multimeter switched to Resistance that
pins GNDL, GNDR and the screen tags of both transformers have
good continuity to the Earth Terminal.
Solder the red cable from the positive terminal of the power
supply capacitor to the HT terminal of the nearest (Left
Channel) transformer and, using a length of Red cable link this
with the HT terminal of the other (Right Channel) transformer.
Using short lengths of red cable link the HT terminals of both
transformers to their corresponding HT PCB pins
–
“
HT
”
for the
Right Channel transformer and
“
HT1
”
for the Left.
WDPre3 Kit Assembly Instructions
FITTING THE PRE3 PCB
Fig. 10
Fig 10. Transformer Screen Links
Fig. 11
