ETC L86 Service Note

E T C S e r v i c e N o t e
®
Power Cube Replacement in L86 Dimmer Modules
O v e r v i e w :
L86 dimmer cards have one or two power cubes within their tray. The power cube is responsible
for chopping the wave so that we are able to dim conventional sources. This is done by allowing
the power cube to receive a low voltage control signal that turns the solid state relay on and off at
the proper times to achieve our dimming goals.
Reasons for failure come from short circuits in the cable or fixture. Due to V = IR V is a constant,
as resistance approaches 0, our current approaches infinity, which in this case will trip the breaker
or burn out the power cube.
Symptoms of a burnt out power cube may include a dimmer being stuck on or off.
Through the years ETC has had many revisions on parts and pieces that are used in the L86
dimmer card. Because of this we recommend that you see additional information before
proceeding, to see if this manual applies to you.
Note: If your power cube has screw terminals instead of crimp connections, please contact
ETC for assistance on choosing the appropriate power cube.
Too l s N e e d e d :
Phillips #2 Screwdriver
Pliers
Rubber gloves
Thermal Joint compound
Rubbing alcohol
Towels or rags
5/8" Nut driver with ground down tip (see additional information)*
3/8" Nut driver with ground down tip (see additional information)*
Note: See additional Information for tools marked with a *
P r o c e d u r e :
Step 1:
Corporate Headquarters
London, UK

Rome, IT Via Ennio Quirino Visconti, 11, 00193 Rome, Italy

Holzkirchen, DE
Hong Kong

Service: (Americas)
Web: www.etcconnect.com
Technical Services
P ow er C ub e R ep la ceme nt in L 86 Di mme r Mo dul es
With your pliers, pull off circled wire crimps from relay.
3031 Pleasant View Road, P.O. Box 620979, Middleton, Wisconsin 53562-0979 USA

Unit 26-28, Victoria Industrial Estate, Victoria Road, London W3 6UU, UK
Ohmstrasse 3, 83607 Holzkirchen, Germany

Rm 1801, 18/F, Tower I Phase 1 Enterprise Square, 9 Sheung Yuet Road, Kowloon Bay, Kowloon, Hong Kong
service@etcconnect.com (UK) service@etceurope.com

Copyright © 2009 ETC. All Rights Reserved.
QSF 4.1.9.1
 
Rev A Released 2009-07
 
Tel +44 (0)20 8896 1000

Tel +39 (06) 32 111 683 Fax +44 (0) 20 8752 8486
 
Tel +49 (80 24) 47 00-0 Fax +49 (80 24) 47 00-3 00
 
(DE) techserv-hoki@etcetcconnect.com.com

Product information and specifications subject to change.

P ag e 1
Tel +608 831 4116 Fax +608 836 1736
 
Fax +44 (0)20 8896 2000

Tel +852 2799 1220 Fax +852 2799 9325
 
(Asia) service@etcasia.com

El ect r on ic T he at r e C on t ro ls , I nc .