QSC EX-800 Schematic
TEMP/PROT DISPLAY
RED LED
LIM/CLIP DISPLAY
RED LED
LEVEL DISPLAY
-30 -10
YEL LEDS
POWER-ON DISPLAY
GRN LED
CH 1 GAIN
11-POSITION
BALANCED
INPUT
THERMAL
FLASHER
DISPLAY
DRIVER
STEP DRIVER
14-PIN J 101
J 50_, 14-PIN
+24 V
+15 V
-15V
-24 V
MUTE
SPKR
THERM
+INPUT
GND REF
GND
CLIP
NO CONNECTION TO SECOND HOUSEKEEPING
ON/OFF
TO SPKR
A
MUTING
DC FAULT
DETECTOR
THERMAL
SENSOR
LIMITER
AMPLIFIER
MUTING
CLI P
DETECTOR
POWER AMP BOARD, BOTH CH
PC-004101-00
POWER AMPLIFIER CH 1
J 501, 6-PIN MATELOK
PIN 3
POS VOLTAGE
RECT (1)
FUSE (2)
OUTPUT
POWER AMPLIFIER CIRCUITBAL INPUT OPTOCELL
RELAY
NEG VOLTAGE
PIN 6
PIN 2
PIN 5
PIN 1
PIN 4
0.25-INCH TABS
T 501
T 502
CH 1 MAIN SECS
SPEAKER
TERMINALS
CH 1
FRONT DISPLAY PCB
CH 2
TEMP/PROT DISPLAY
RED LED
LIM/CLIP DISPLAY
RED LED
LEVEL DISPLAY
-30 -10
YEL LEDS
POWER-ON DISPLAY
GRN LED
CH 1 GAIN
11-POSITION
BALANCED
INPUT
PC-004001-00
THERMAL
FLASHER
DISPLAY
DRIVER
STEP DRIVER
14 PIN
J 201
26 PIN
J 1
IN/OUT BUS
CONNECTOR
BLOCK DIAGRAM, EX-800
REV A, 3-18-91, QSC AUDIO PRODUCTS INC, DOC NO SH-004100-01, FILE SH4100A2.FCD
PWR-ON
J 60_, 14-PIN
+24 V
+15 V
-15V
-24 V
MUTE
SPKR
THERM
+INPUT
GND REF
GND
CLIP
PWR-ON
TO +50% POWER SUPPLY
MASTER HOUSEKEEPING POWER
HOUSEKEEPING
POWER SUPPLY
ON/OFF
TO SPKR
A
TO +50% POWER SUPPLY
MUTING
DC FAULT
DETECTOR
THERMAL
SENSOR
LIMITER
AMPLIFIER
MUTING
CLI P
DETECTOR
COMMON HOUSEKEEPING SECONDARY.
TO EACH CH THERM SENSE
FAN SPEED
CONTROL
POWER AMPLIFIER CH 2
POWER AMPLIFIER CIRCUITBAL INPUT OPTOCELL
J 5_, 5 PIN?
18 VAC
CT
18 VAC
PTC
PTC
-24 V
FAN
J 5_, 2 PIN, OR COMBINE WITH 5-PIN???
POS VOLTAGE
RECT (1)
FUSE (2)
OUTPUT
RELAY
NEG VOLTAGE
COOLING
24 VDC
J 501, 6-PIN MATELOK
PIN 3
PIN 6
PIN 2
PIN 5
PIN 1
PIN 4
IN/OUT BUS
CONNECTOR
FAN
CH 2 SECS
26-PIN J 32
AC POWER
TRANSFORMER
AC FUSE
AC VOLTAGE
SELECTOR
PC-004103-00
0.25-INCH TABS
T 501
T 502
CH 1 +INP
CH 1 -INP
CH 1 GND
CH 1 SPKR MON
CH 1 CLIP MON
CH 1 THERM MON
CH 1 PROT MON
CH 1 PWR MON
+24 VDC
+15 VDC
-15 VDC
-24 VDC
CH 2 SPKR MON
CH 2 CLIP MON
CH 2 THERM MON
CH 2 PROT MON
INPUT BOARD
SPEAKER
BOARD
PC-004104-00
SPEAKER
TERMINALS
INPUT
TERMINALS
PC-004002-00
SH-004101-02 1 K
SCHEMATIC, 2-CH POWER AMPLIFIER, EX 800SCHEMATIC, 2-CH POWER AMPLIFIER, EX 800
REV D, 10-22-92, FOR PC-004101-00
DOC NO SH-004101-02 FILE NO SCH800G*.FCD
SHEET 1, HOUSEKEEPING POWER AND FAN SPEED CONTROLSHEET 1, HOUSEKEEPING POWER AND FAN SPEED CONTROL
+24 V
1
+15 V
3
-15 V
4
-24 V
2
SCHEDULE OF TEST POINTS ETCJ 502-1
CH-1 CH 2
J 502-1 J 602-1 NEGATIVE LIMITING VOLTAGE
J 502-2 J 602-2 POSITIVE LIMITING VOLTAGE
J 502-3 J 602-3 NOT USED
J 502-4 J 602-4 AMPLIFIER LOOP OPAMP OUTPUT
J 502-6 J 602-6 POS AMPLIFIER RAIL--HIGH VOLTAGE
J 502-8 J 602-8 NEG AMPLIFIER RAIL--HIGH VOLTAGE
PART NUMBERING SCHEDULE FOR PCBS USED IN EX-1600:
PCB NUMBER DESCRIPTION CH 1 PARTS CH 2 PARTS PARTS IN COMMON
PC-004001-00
PC-004002-00
PC-004101-00 AMP PCB
PC-004104-00
PC-004103-00 AC PCB
DISPLAY PCB
INPUT PCB
SPKR PCB
101-199 201-299 1-29
301-399 401-499 31-49
501-599 601-699 51-69
701-799 801-899 71-99
901-UP (SAME BOARD FOR CH 1, CH2)
+24 V UNREG
+15 V REG
-15 V REG
-24 V UNREG
U 52
7815
321
C 53C 56
7915
2200
35V
C 54
35V
100
35 V
C 55
100 2200
35 V
D 53
1N4746, 18V
D 52
1N4746, 18V
32
1
U 51
+23V ON/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
TO SHEET 2
J 51
XF PTC
5
XF PTC
4
18 Vac
R 698
PTC-60C
RE-000006-PT
THERMALLY
CONNECTED
TO Q 607
1
2.7K
18 Vac
2
CT
3
D
C
R 52
2.7K
-24 V
180K
NOTES.
1. ALL RESISTORS 1/4-WATT, 5% UNLESS NOTED.
2. ALL CAPACITORS 100V UNLESS NOTED.
3. BRIDGE RECTIFIER BR 51, 1.5A, 100V.
4. R 598, 698 IS POSITIVE TEMPERATURE COEFFICIENT RESISTOR MOUNTED TO HEAT SINK.
D 51 RN 51
1N4004
BR 51
5. PARTS MARKED WITH TRIANGLE MUST BE REPLACED WITH EXACT TYPE ONLY.
6. ZENERS D 503, 504, 603, 604 MARKED 7.5 V TESTED FOR LOW LEAKAGE, QSC P/N QD-0007.5-ZT.
7. ZENERS D 509, 513, 609, 613, 6.2V-500mW, TESTED FOR LOW LEAKAGE, QSC P/N QD-000024-QD.
8. PARTS ENCLOSED WITHIN DOTTED OUTLINE HAVE VOLTAGES GREATER THAN 42V.
AUDIO AND POWER GROUNDS
A
R 51
47K
C 51
100-35V
C 57
.01
B
Q 51
2SC3298B
J 52-1
FAN BLK
24 V BRUSHLESS FAN
FAN RED
J 52-4
Q 52
2N2907
2N4410
C 52
47-10NP
Q 53
2.7K
2.7K
A
TOLERANCE 20% FOR ELECTROLYTIC TYPES, 10% ON OTHER TYPES.
RESISTANCE 100 OHM COLD, RISING AT 55 C. QSC P/N RE-000006-PT
125 W, 60 V MINIMUM, ON-RESISTANCE 0.030 OHMS MAX.
R 53
3.3-1W
B PROD RELEASE PER ECO 1107 GLF
C REVISED PER ECO 1158
D REVISED PER ECO 1128 RDS
E
REVISED PER ECO 1262
L
G
L
G. 7-9-91
7-26-91
11-6-91
6-10-92F REVISED PER ECO 1508 SGM
G REVISED PER ECO 1602 WR 10-22-92
H REVISED PER ECO 2009
J REVISED PER ECO 2371 MP (EFF. 7-28-94)
L
5-11-94
G.
7-20-94
K REVISED PER ECO 2393 MP (EFF. X-28-94)
HEAT SINK GROUND
W.R. /
SGM
SGM5-29-91
SGM
SGM
SGM
SGM
SGM
/
SGM
RAB
LAST USED REF. DESIGN.
BR 51, BR 502, 602
C51 - 57, C526, 626
D51 - 53, D513, 613
F504, 604
J51, 52, J503, 603
K501, 601
L501, 601
Q51 - 53, Q510, 610
R51 - 53, R544, 644, R598, 698, R599, 699
RN51, RN502, 602
U51, 52, U506, 606
VR503, 603
+23V ON/OFF ENABLE TRANSFORMER THERMAL SENSOR THERMAL BUS TO FAN SPEED CONTROL
TO SHEET 3
WP-004101-20
APPLICATION
EX800
USED ONNEXT ASSY
AUDIO PRODUCTS
PHQ 5-15-91
SA/SGM 5-29-91
SCH800J1.FCD SH0800K1.FCD
SCHEMATIC EX 800
DRAWING
SH-004101-02 K
1 3
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