Electro-Voice EVH-1152S/99 Manual

Electro-Voice Højttaler EVH-1152S/99

Læs gratis den danske manual til Electro-Voice EVH-1152S/99 (4 sider) i kategorien Højttaler. Denne vejledning er vurderet som hjælpsom af 26 personer og har en gennemsnitlig bedømmelse på 4.3 stjerner ud af 13.5 anmeldelser. Har du et spørgsmål om Electro-Voice EVH-1152S/99, eller vil du spørge andre brugere om produktet?

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Side 1/4
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
#2
1. If applicable, remove screws holding the security cover, gland nut cover, or NL4 cover in
place. Note position of the switch card. The card must be replaced in exactly the same
position as it was originally or system performance will be adversely affected!
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). For complete model-
specific DCR values, consult the chart on page 4.
Figure 1:
Switch Card Removal / Access Card Install
Figure 2:
Ohm Meter Calibration
Adjust
0.0
<50.0


1. Test the woofer: Place one test lead securely on each of the RED test points on the Access
Card. A properly functioning woofer will read approximately 5.0 ohms DCR, ±0.5 ohm (See
Figure 3). A significantly higher reading indicates an open voice coil, meaning the woofer
must be replaced. A significantly lower reading indicates a voice coil that is shorting, mean-
ing the woofer must be replaced.
2. Test the compression driver: Place one test lead securely on each of the YELLOW test
points on the Access Card. A properly functioning compression driver will read approxi-
mately 4.3 ohms DCR, ±0.5 ohm (See Figure 4). A significantly higher reading indicates an
open voice coil, meaning the compression driver must be replaced. A significantly lower
reading indicates a voice coil that is shorting, meaning the compression driver must be re-
placed.
3. Test the PTP (Power Tracking Protection) network: Place one test lead securely on each of
the GREEN test points on the Access Card. A properly functioning PTP will read no more
than 2 ohms (See Figure 5). If the reading is higher, replace the SK-3 lamps on the cross-
over PCB.
4. Unplug the Access Card and re-install the switch card in exactly the same position it was in
originally. If applicable, Re-attach the security cover, gland nut cover, or NL4 cover.
Figure 3:
EVF/EVH Woofer Test
Figure 4:
EVF/EVH Compression
Driver Test
Figure 5:
EVF/EVH Protection
Network Test

 Experienced technicians may perform more
sophisticated tests by connecting specialized test gear in place of the ohm meter.




Note: EVF low-frequency systems have no PTP or compression drivers, and use different woof-
ers. See the chart on page 4 for correct DCR values.
5.0 4.3 1.1

Produkt Specifikationer

Mærke: Electro-Voice
Kategori: Højttaler
Model: EVH-1152S/99

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