NAD S-250 free download

File name S-250.pdf

S250 SERVICE MANUAL FIVE CHANNEL POWER AMPLIFIER FIVE CHANNEL POWER AMPLIFIER S250 CONTENTS FRONT PANEL / REAR PANEL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 ALIGNMENT PROCEDURE / ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . 5 WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 PCB LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11 ELECTRICAL PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14 EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 PACKING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 SERVICE SAFETY PRECAUTIONS 1. Replacing the Fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE OF FUSE. REFERENCE NO. PART NUMBER DESCRIPTION PSU Board F1*AH ! 5120-0506-0 12.5A 250V Time Lag 6.3x32mm UR F1*C ! 5120-0025-0 6.3A 250V HBC Time Lag 5x20mm SEMKO/VDE Amp Board F1-F2*AH ! 5120-0040-0 6.3A 250V Time Lag 5x20mm UL F1-F2*C ! 5120-0025-0 6.3A 250V HBC Time Lag 5x20mm SEMKO/VDE NOTE: *AH : North American version only *C : European version only 2. Safety-check out (North American model only) Before returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from the supply circuit. Parts marked with the symbol ! are critical with regard to the risk of fire and electric shock. Replace only with parts recommended by the manufacturer. FRONT PANEL / REAR PANEL VIEW RETURN TO CONTENTS FRONT PANEL CONTROLS NAD Five Channel Power Amplifier S250 PROTECTION SOFT CLIPPING 1 2 3 4 1. POWER SWITCH 3. PROTECT