Cloud CXL-50T User manual

CXL-50T
100/70 V Transformer
Installation Guide
It should be recognised that 100 V- or 70 V-line speaker systems have the
potential to deliver an electric shock. Install the CXL-50T only in
accordance with these instructions.
In all cases, the external wiring and associated speakers will need to comply with local
electrical regulations for AC voltages up to 100 Vrms (141 Vpeak).
Do not expose the transformer to rain or moisture.
The transformer must be installed in a safe manner. Cloud Electronics Ltd., accept no
responsibility for hazardous installations.
Important Safety Notes

CXL-50T Installation Guide v1.02
The CXL-50T is an optional transformer kit for the MA60/MA60MEDIA, to permit the
MA60/MA60MEDIA to directly drive 100 V, 70 V or 50 V-line loudspeaker systems. The
transformer is rated at 50 W output, and is mounted internally. The outputs are available
on a 4-pin 5 mm-pitch screw-terminal connector which occupies the hole (shown
below) in the rear panel normally covered by a blanking plate.
CXL-50T Connector
Introduction
Fitting the CXL-50T transformer kit
The transformer kit comprises the following items:
• CXL-50Ttoroidaltransformer,terminatedonPCB-mounted4-pin 
connector
• M6countersunk-headxingbolt
• Safetycover
• 2xM3hexpillars
• 2xM3x6screws
• Mating4-pinconnector
• 2xcableties
Proceedasfollows:
1. Disconnect the MA60/MA60MEDIA from AC mains.
2. TakethetoppaneloffbyremovingtheeightM3screws(sixonthetoppanel
itself; two through the fornt panel) securing it.
3. Turntheunitupsidedown,andremovetheplasticblankingplugfromtheM6
hole in the base of the unit. (The hole is in the centre of the chassis, about 8 mm
behindthefrontpanel.)InserttheM6xingboltsuppliedwiththekitthroughthe
hole.

CXL-50T Installation Guide v1.0 3
4. Fitthetransformerwiththexingscrewthroughitscentralcore.Thetopof
the transformer has a threaded M6 insert; tighten the screw from underneath using
a hex key.
FRONT PANEL
MEDIA
PLAYER PCB
FRONT PANEL
CONTROLS PCB
MAINS
TRANSFORMER
CXL-50T OUTPUT
TRANSFORMER
MAIN PCB
CN15A
CN15B
100/70/50 V-LINE OUTPUT
CONNECTOR PCB
Red/Brown/
Blue/Black
White/Black
5. The primary winding of the transformer is terminated in a two-pin Molex-type
connector.ThisshouldbepluggedintotheheadermarkedCN15Bonthemain
PCB.Seediagramonpage4forlocation.
6. On the rear panel, remove the plastic blanking plate covering the LINE
OUTPUTconnectorhole.
7. Fit the 4-pin connector on the ends of the secondary winding leads from the
transformer (the remaining four) into this hole, so that the threaded holes in the
twoPCBmountingbracketslineupwiththetwoholesalongsidetheconnector.
Usethemaleendsofthehexpillars(supplied)tosecurethePCBandconnectorin
place.
8. Use the two cable ties supplied to tidy up the transformer leads; ensure that
they do not pass over the top of the main heat sink.
9. Replace the top cover, using the original screws.
10. Connect the speaker system to the line outputs using the mating connector.
Note that only two of the pins will be used; one will always be pin 1 (0 V).

4
1
4
3
2
Pri. Sec.
To 100/70/50 V-line
speaker system
70 V
50 V
COM
White
Black
Red
Brown
Black
CXL-50T
Blue
100 V
Connect to
CN15B
Rear panel
connector
11. Afterpluggingtheconnectorin,thesafetycovershouldbettedbysecuringit
tothefemaleendsofthehexpillarsusingthetwoM3screwssupplied.
Important - Note that the low-impedance output should not be used once the line
outputtransformeristted.
Oncethetransformeristted,itisstronglyrecommendedthattheMA60/MA60MEDIA’s
65HzhighpasslterissetONbymovinginternaljumperJ13.Thisistominimise
distortion due to transformer saturation at low frequencies.
CN16
(below ribbon cable)
Loudspeaker EQ card socket
Input PCB (vertically-mounted)
MA60 MAIN PCB
VIEW FROM REAR
NOT TO SCALE - Only primary components shown
ONOFFONOFF
SWAVONC NO
ONOFF
ONOFF
ONOFF
ON OFF
CN15ACN15B
Lo-Z outputs
CN15B
J13
Cloud Electronics Limited
140 Staniforth Road, Shefeld, S9 3HF. England.
Telephone: [phone] Fax: [phone]
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