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EV-I Access Card

Access Card for Plug-In

Loudspeaker Diagnostics

User Instructions

Tools Required:

Instructions:

1. #2 Phillips Screwdriver 2. Ohm Meter capable of accurate

measurements below 50 ohms

1. If applicable, remove screws holding the security cover, gland nut cover, or NL4 cover in

place. 



2. Carefully remove the switch card and set it aside. Plug the Access Card onto the header in

place of the switch card. Note that the Access Card, unlike the switch card, will only fit in

one position centered on the input cup (See Figure 1).

3. Turn on the Ohm Meter and set it to the low ohms (x1) scale. Short the two probes togeth-

er and calibrate the meter to “Zero” (See Figure 2). If your meter does not have this calibra-

tion feature, note the ohms reading. This is the residual internal resistance of the meter,

probes and test leads. You will need to DEDUCT this number from the results you measure

at the Access Card.

The Access Card is a unique feature of the EV-Innovation series loudspeaker families. This

simple plug-in device allows diagnostic access to the transducers and protection circuitry

inside the enclosure WITHOUT requiring any disassembly or disconnections beyond simple

removal and replacement of the plug-in switch card. DCR values described in these instruc-

tions are typical for EV-I series two-way systems (eg: EVF-1122S/64). 



Figure 1:

Switch Card Removal / Access Card Install

Figure 2:

Ohm Meter Calibration

Adjust

0.0

<50.0

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Seite 1 - <50.0

EV-I Access CardAccess Card for Plug-InLoudspeaker DiagnosticsUser InstructionsTools Required:Instructions:1. #2 Phillips Screwdriver 2. Ohm Meter c

Seite 2 - 5.0 4.3 1.1

1. Test the woofer: Place one test lead securely on each o

Seite 3 - 43.2 41.6 41.6

Note the position of the HF shading switch card. The

Seite 4 - 44.7 44.7

12000 Portland Avenue South, Burnsville, MN 55337Phone: 952/884-4051, Fax: 952/884-0043www.electrovoice.com© Bosch Communications Systems 04/2011

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