User manual ELECTRO-VOICE 654A DATASHEET
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Manual abstract: user guide ELECTRO-VOICE 654ADATASHEET
Detailed instructions for use are in the User's Guide.
[. . . ] When the provided plug does not fit into your outlet, consult an electrican for replacement of the absolete outlet.
IMPORTANT SERVICE INSTRUCTIONS
CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of electric shock, do not perform any servicing other than that contained in the Operating Instructions unless you are qualified to do so. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when servicing the appliance. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs to be operated and is connected to the mains 3. [. . . ] Indicators And Fault Notification 7. 1 STANDBY Indicator When correctly connected and with mains voltage and/or battery voltage present, the green STANDBY indicator (4) lights. 7. 2 READY Indicator The power amplifier 654A provides a power-on delay of approximately 3 s to prevent switch clicks from becoming audible. If after this period of time no faulty condition has been detected, the green READY indicator (7) lights and the mute-relays pull. When thermal overload of the mains transformer or of one of the power output stages is detected, the corresponding green READY indicator (7) will not light and the according mute-relay drops. If, with the NRS 90206 extension installed the pilot-threshold (see paragraph 9. 1) is declined, the corresponding green READY indicator (7) goes out but the amplifier stays operational and a fault message gets transmitted to the PROMATRIX Manager DPM 4000. 7. 3 PROTECT Indicator In case of thermal overload of the mains transformer or of a power output stage is detected, the red PROTECT indicator (5) will light. During thermal overload of the mains transformer, all mute-relays drop while during thermal overload of a power output stage, only the according mute-relay drops. After the mains transformer or the power amplifier have regained their normal temperature, the red PROTECT indicator (5) automatically goes out and the appliance recovers normal operation mode. The faulty condition could have been caused by either overload, too high environmental temperature, or by an error in the ventilation system. A fault-message is transmitted to the PROMATRIX Manager DPM 4000.
7. 4 GROUND FAULT Indicator If, with built-in NRS 90207 a ground fault condition at one of the power outputs occurs, the corresponding red GROUND FAULT indicator (6) lights and a fault-message is transmitted to the PROMATRIX Manager DPM 4000. The power amplifier keeps up normal operation during the occurrence of this fault-type. - the NRS 90206 gets retrofitted on the printed board assembly 89019. 1, which is located behind the input printed board assembly 81331, in the front area, attached to the left side panel of the amplifier (in front view). - Be sure to first insert the included board-guides before installing the printed board assembly, assuring the correct position of their guide grooves. The release lever of the guides marked "A" points to the top, while the one of the guides marked "B" points downwards. - the NRS 90206 extension-kit needs to be inserted with its printed side pointing to the top, until it firmly locks in place. Make sure that the power resistors R917 to R920 that are located underneath the NRS-printed board assembly do not touch this board. - closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.
Printed board assembly 89019. 1 showing the position of the modules NRS 90206 and NRS 90207
9. 1. 2 Checking The Function Of The NRS 90206: With built-in NRS 90206 and powered-on amplifier, the READY-indicators (7) have to light. Use the check and reset-button TEST (3) to check the functioning of the pilot tone surveillance. When holding the TEST-button pressed, the 19 kHz tone-generator is switched off, the READY-indicators (7) go out and a fault-message is being transmitted to the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook). Approximately 3 seconds after releasing the TEST-button, the READY-indicators (7) have to light again. 9. 2 NRS 90207 Ground Fault Surveillance The VDE regulation DIN VDE 0800 has to be obeyed when planning and operating 100 V sound reinforcement systems. Especially 100 V alert systems have to be in accordance with all protection measures for class 3 appliances. [. . . ] disconnect the resistors R95, R96, R97 and R101 before installing the monitor output transformer. mount the monitor output transformer on the printed board assembly 81331; in doing so, polarity is of no importance, since the transformer is balanced. reinstall the input printed board assembly 81331 following the description in paragraph 9. 3. 1. closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.
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