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14. Test
Connect a symmetrical supply (K4006 or a transfo 2 x 18VAC / 225VA) with + and - 28 VDC maximum to the
GND (0V), -V and +V points. See figure 6.0.
IMPORTANT: Never switch on the supply voltage and then connect to the amplifier!
Switch on the supply voltage. Under normal circumstances both LED's on the amplification PCB should light
up, meaning that the supply is all right.
Make the following measurement:
No more than 1VDC should be measured between the terminals normally connected to the loudspeakers
(see fig. 6.0).
RIGHT
MIN. 4 Ohm
+
-
RIGHT
K4004
+LS
LEFT
RIGHT
+LS
INPUT
INPUT
LEFT
+
-
LEFT
MIN. 4 Ohm
STEREO : 2 X 50W
POWER
+V
-LS
SUPPLY
GND
APS200
-LS
-V
Fig 6.0
RMS
+V
GND
-V
Test
11
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