Qsc - RMX2450 Service Bulletin 电路图.pdf

《Qsc - RMX2450 Service Bulletin 电路图.pdf》由会员分享，可在线阅读，更多相关《Qsc - RMX2450 Service Bulletin 电路图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

1、1RMX0004 Title:RMX 2450 AC Wire Routing Bulletin #:RMX0004Issue Date:November 3, 2000 Models Affected:RMX 2450Bulletin Revision:A Production Range: 01/200010/2000 (serial # 0100 xxxxx1000 xxxxx) Service Bulletin Description In the RMX 2450, the wiring to the AC switch is routed at the factory along

2、the side of the chassis and secured with tie wraps to small loops (called bridge lances) in the chassis. One bridge lance lies right next to the toroidal power transformer with only a few millimeters to spare. In shipping or handling the amplifier, the potential exists for the transformer to shift a

3、nd/or the chassis to flex, causing the transformer to pinch or abrade the wires against the bridge lance, and possibly cause it to cut through the insulation on the wire. This could short-circuit the AC current to the chassis, a very dangerous situation. This bulletin describes a procedure rerouting

4、 the AC wiring so it is not susceptible to being pinched and shorted to the chassis. NOTE: This modification corrects a potentially dangerous situation and is mandatory on all RMX 2450 amplifiers built in the affected production range. NOTE: Any repair to the AC primary wires, beyond installing the

5、protective sleeve described in this bulletin, must be performed at an authorized service center or the factory. Units affected The units affected are RMX 2450 amplifiers manufactured from January through October 2000. Visual inspection First, verify that the amplifiers serial number places it in the

6、 affected production range. If it does, see whether it has already been modified: look through the ventilation slots on the left side panel of the chassis, near the front. If you see brown wires near the upper slots and no insulator board between the power transformer and the side wall of the chassi

7、s, the amplifier needs to be modified. If you can see insulator board at the rear edge of the slotsand not brown wiresbetween the transformer and the chassis, the amplifier has already been modified. Instructions Tools and materials required: Long-nose pliers Small diagonal cutters Wire strippers #2

8、 Philips screwdriver Torque wrench contact QSC Technical Services for information. If the transformer mounting is loose, tighten the nut to 115 lb-in (9.5 lb-ft) or 13 N-m and apply thread locking compound. 5.Inspect the wires for damage. If on either wire the insulation is cut or crushed, exposing

9、the conductors within, or if any of the copper strands in the wire are severed, the wire must be replaced before completing this service procedure. Replacing the wire is covered in a separate service bulletin and must be performed only by QSC factory service or by an authorized service center. Conta

10、ct QSC Technical Services for information. 6.Reroute the wires around the transformer as shown in Figure 3. 7.Slide the large sleeving over the two wires and reattach the quick- connect terminals to the switch terminals. 8.Orient the insulator board with its hole up and to the rear. Slide it into th

11、e space between the transformer and the bridge lance on the side of the chassis, and between the wires and the chassis (Figure 2). Place the hole in the insulator board over the middle bridge lance. 9.Slip a tie wrap through the bridge lance; it will hold the insulator board in place. Bundle the wir

12、es with the tie wrap so they are supported, but do not tighten the tie wrap so much that it strains them. 10. Bundle the two brown wires with the secondary wires and bind them all with a tie wrap. Procedure: Finishing the repair 11. Re-install the top cover; if any screws are stripped or damaged, re

13、place them with the extras provided in the kit. Connect the amplifier to an AC source and make sure the amplifier turns on. If a HIPOT tester is available, test the amplifier to 2250 volts. The amplifier can be returned to use. IEC connector Circuit breaker Insulator board placed over bridge lance a

14、nd secured (along with bundled wires) by a new tie wrap. Switchwiresbundled withsecondarywires andsecuredwitha newtiewrap. p AC wires rerouted around transformer. Transformer inspected for damage. Tightness of transformer mounting checked. Sleeving to protect wires. Figure 2. Inserting the insulator board between the chassis and the transformer. Figure 3. The amplifier after modification. RadioFans.CN 收音机爱 好者资料库