QSC EX4000 free download

File name QSC-EX4000 pwramp.pdf

SCHEMATIC, AMPLIFIER CHANNEL, EX 4000-B REV U, 2-15-95, FOR PC-004200-00 REV K J 904 J 903 +24 V +15 V -15 V -24 V D 938 1 1 +24 V UNREG +15 V REG -15 V REG -24 V UNREG U 906 IC-000008-00 SCHMIDTT COMPARATOR J 901 HIGH RAIL +142 V RAIL L G. T9 D GATE 10 1N4004 1N4004 1N4004 1N4004 18 Vac LOSS-OF-SAT GATE DRIVER SHUTDOWN R 901 T8 R 902 22 FP G S D G S C 933 C 934 15000-50V 2 PL D 942 3 U 904 C 954 100 25 V C 953 100 25 V 7815 3 2 1 D 937 1N4004 C 945 2200 35V B 901 2 22 FP Q 901 Q 902 D 941 4 18 Vac SOURCE REF D 947 2 D 940 1N4746, 18V D 939 1N4746, 18V T7 3 CT XF PTC XF PTC T1 REF VOLT LOW RAIL SHUTDOWN SLEW NEG SUPP BOOTSTRAP CAP C 901 .10 R 903 2.7-2W D 936 1N4004 C 941 10-25V R 982 470-1W C 946 2200 35V 2 4 5 T2 T3 T4 T5 T6 C 903 47-50V R 911 22K-1W D 901 MUR1510 3 1 U 905 7915 J 902 +94 V RAIL 1 4 3 GND -24 V RELAY DR THERMAL LOSS-OF-SAT GATE DRIVER SHUTDOWN SOURCE REF U 907 IC-000008-00 SCHMIDTT COMPARATOR HIGH RAIL T9 D GATE 7 MUTING INPUT CAP. C 943 47-35V C 944 47-35V T1 T2 T3 RELAY TIMING CAP. ON-OFF MUTING DELAY SHUTDOWN MUTING RELAY MUTING BUS MUTE +8V RUN 0V U 910 IC-000010-00 2 R 906 T8 R 904 22 FP G S D G S C 931 C 932 15000-50V 2 PL 22 FP GROUND MUTE -24V RUN +15V Q 903 Q 904 R 1007 PTC-60C BH-100 THERMALLY CONNECTED TO Q 911 REF VOLT LOW RAIL SHUTDOWN SLEW NEG SUPP BOOTSTRAP CAP T7 R 910 2.7-2W T4 MUTE 10 TO +15V DRIVER C 902 .10 MUTE BUS T5 THERM ADJUST, 0.5-8.5V T1 T2 T3 T4 T5 T6 C 904 47-50V R 917 22K-1W D 902 MUR1510 R 987 330K T6 R 989 60.4K THERMAL SENSING THERMAL SENSE, 0-8V 50C +O.5V 90C +8V D 951 7.5V +46 V RAIL T7 THERMAL BUS, 0-8V PROCESSING BUFFER THERMAL 8 T8 R 996 C 952 220-16NP 27K T9 DC PROTECT SENSE OP-AMP OUT - HF PROTECT SPEAKER BUS J 905-3 SHUTDOWN DETECTORS THERMAL HIGH FREQ DC RECTIFIER THERMAL LIMITING C 963 .0022uF 200V +46 +94 +142 V SWITCHED BUS J 905-6 R 927 22-1W R 924 R 925 R 928 R 926 R 930 R 929 .22-3W 6 PL D 907 1N5402 C 929 C 930 2 PL 15000-50V L 901 2uH 4 T10 R 994 10K-2W T11 OP-AMP OUT TO MUTING R 931 CLIP RECTIFIER-BUFFER 50 OHM 25 C VR 901 100 BIAS U 902-B 5 C 956 220p +15 V 8 7 U 902-A 5532 1 1 3 3 2 LIMITING THRESHOLD +4.5V 0-3Vac NORMAL AUDIO 4.5-6.5Vac CLIPPING PEAKS T12 OPTOCELL IDLE -1.2V CLIP +3V PEAKS MUTE +4.5V R1001 15K SWITCHING THRESHOLD R 947 332 R 943 750K D 921 1N5956B 200 V R 1002 47 TRANSFORMER CENTER TAP Q 905 Q 933 Q 906 Q 907 Q 908 Q 909 Q 910 2SC3298B R 945 1K D 922 1N4148 R 937 4.7-1W 2SA1302 6 PL AUDIO OUTPUT STAGE HEATSINK GROUND 8 T13 CLIP BUS C 911 .01 D 903 1N4004 6 4 -15 V R 933 11 SPEAKER OUTPUT REFERENCE C D 923 1N4148 R 934 10-2W 4 PL C 913 .10 R 935 R 936 2 5 SPEAKER COMMON CLIP 11 TO +15 V T14 +15 V BIAS NETWORK A R 995 2.7K C 955 .0022 D B R 944 750K R 948 332 R 946 1K R 938 4.7-1W Q 934 R 939 4.7 FP 2SC3281 6PL Q 913 Q 914 Q 915 Q 916 T15 -15 V R 932 3.9-2W C 912 D 908 IN5402 R 954 .22-3W 6 PL .10 J 905-1 C 960 470-10V TO -15 V