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QSC ISA 280, Техническое и сервисное руководство

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Technical Service Manual

5

ISA Series Power Amplifiers

ISA Series Performance Specifications

ISA280 & ISA300Ti

ISA450 & ISA500Ti

ISA750 & ISA800Ti

ISA1350

OUTPUT POWER 

in watts

FTC: 20 Hz–20 kHz @ 0.1% THD, both channels driven, direct outputs

8W per channel

185

260

450

800

4W per channel

280

400

650

1300

FTC: 50 Hz–16 kHz @ 0.5% THD, both channels driven, transformer outputs

70V or 100V (per channel)

300 (ISA 300Ti)

500 (ISA 500Ti)

800 (ISA 800Ti)

25V (per channel)

240 (ISA 300Ti)

400 (ISA 500Ti)

640 (ISA 800Ti)

FTC: 20 Hz–20 kHz @ 0.5% THD, both channels driven, direct outputs

70V (per channel)

1500

EIA: 1 kHz @ 0.1% THD, both channels driven

8

Ω

 per channel

200

280

500

850

4

Ω

 per channel

300

450

750

1400

1 kHz @ 1% THD, typical, both channels driven

2

Ω

 per channel

430

700

1200

2000

Bridge Mono:

8

Ω

, 20 Hz–20 kHz, 0.1% THD

530

800

1300

2600

8

Ω

, 1 kHz, 0.1% THD

600

900

1500

2800

4

Ω

, 1 kHz, 1% THD, typical

830

1400

2400

4000

140V or 200V, 50 Hz–16 kHz, 0.5% THD

600 (ISA 300Ti)

1000 (ISA 500Ti)

1600 (ISA 800Ti)

140V, 20 Hz–20 kHz, 0.5% THD (direct outputs)

3000

50V, 50 Hz–16 kHz, 0.5% THD

480 (ISA 300Ti)

800 (ISA 500Ti)

1280 (ISA 800Ti)

DYNAMIC HEADROOM

2 dB @ 4

Ω

2 dB @ 4

Ω

2 dB @ 4

Ω

2 dB @ 4

Ω

DISTORTION

SMPTE-IM

< 0.01%

< 0.01%

< 0.02%

< 0.02%

FREQUENCY RESPONSE

20 Hz–20 kHz, +0/-1 dB

(at 10 dB below rated output power)

-3 dB points: 5 Hz and 50 kHz

DAMPING FACTOR

> 300 @ 8

Ω

> 300 @ 8

Ω

> 300 @ 8

Ω

> 250 @ 8

Ω

NOISE 

(unweighted 20 Hz to 20 kHz, below rated output)

100  dB

100  dB

100  dB

100  dB

VOLTAGE GAIN

31.6× (30 dB)

40× (32 dB)

50× (34 dB)

64× (36 dB)

INPUT SENSITIVITY, V RMS

full rated power @ 8

Ω

1.15v (+3.4 dBu)

1.15v (+3.4 dBu)

1.23v (+4.0 dBu)

1.24v (+4.1 dBu)

7. Schematics and diagrams ..................................................................................................................................................71

7.1 ISA Series Chassis Assemblies ...................................................................................................................................................................... 71
7.2 ISA280 (1st generation) Schematics ............................................................................................................................................................. 94
7.3 ISA280 (revised) Schematics ........................................................................................................................................................................... 97
7.4 ISA300T Schematics ......................................................................................................................................................................................... 100
7.5 ISA300Ti Schematics ........................................................................................................................................................................................ 103
7.6 ISA450 (1st generation) Schematics ........................................................................................................................................................... 106
7.7 ISA450 (revised) Schematics ......................................................................................................................................................................... 109
7.8 ISA500T Schematics ......................................................................................................................................................................................... 112
7.9 ISA500Ti Schematics ........................................................................................................................................................................................ 115
7.10 ISA750 (1st generation) Schematics ........................................................................................................................................................ 118
7.11 ISA750 (revised) Schematics ...................................................................................................................................................................... 121
7.12 ISA800T Schematics ...................................................................................................................................................................................... 124
7.13 ISA800Ti Schematics ..................................................................................................................................................................................... 127
7.14 ISA750, ISA800T, ISA800Ti Component locations .................................................................................................................................. 130
7.15 ISA1350 Schematics ....................................................................................................................................................................................... 132
7.16 ISA1350 Component locations .................................................................................................................................................................... 136

Table of Contents continued

continued

Содержание ISA 280

Страница 1: ...l Service Manual ISA Series ISA280 ISA300T ISA300Ti ISA450 ISA500T ISA500Ti ISA750 ISA800T ISA800Ti ISA1350 TD 000163 00 TD 000163 00 Rev B QSC Audio Products LLC Costa Mesa CA 92626 USA www qscaudio...

Страница 2: ......

Страница 3: ...qscaudio Postal 1665 MacArthur Blvd Costa Mesa California 92626 USA E mail tech_support qscaudio com Web http www qscaudio com product information and support http www qscstore com parts and accessor...

Страница 4: ...2 QSC Audio Products LLC TD 000163 00 Rev B ISA amplifier rear view...

Страница 5: ...2 Component identification and pinout 15 NE5532AN Dual operational amplifier 15 LM311 Voltage comparator 15 4N29 Opto isolator 15 LM13600 Dual operational transconductance amplifier 15 2N5064 Sensitiv...

Страница 6: ...ISA450 before May 2006 40 Main PCB Assembly ISA450 41 PCB Assembly AC Input ISA280 300Ti 300T 450 500Ti 500T 43 6 5 ISA500T parts and assemblies 44 ISA 500T Power Amplifier 44 Chassis Assembly ISA 50...

Страница 7: ...0 5 THD direct outputs 3000 50V 50 Hz 16 kHz 0 5 THD 480 ISA 300Ti 800 ISA 500Ti 1280 ISA 800Ti DYNAMIC HEADROOM 2 dB 4 2 dB 4 2 dB 4 2 dB 4 DISTORTION SMPTE IM 0 01 0 01 0 02 0 02 FREQUENCY RESPONSE...

Страница 8: ...HD 15 female COOLING Continuously variable speed fan back to front air flow AMPLIFIER PROTECTION Full short circuit open circuit thermal ultrasonic and RF protection Stable into reactive or mismatched...

Страница 9: ...must also not be contaminated by hazardous substances such as lead Therefore you cannot use the same soldering and desoldering tools for RoHS compliant products and solder as you do for non compliant...

Страница 10: ...h tweezers Melt the small mound of solder with the iron and place the component across the two pads in the correct orientation if the component is sensitive to direction and press it flat against the...

Страница 11: ...process until all the pins are free and you can remove the component Insertion 1 With a soldering iron and appropriate solder melt just enough solder onto one pad to create a small mound of solder It...

Страница 12: ...ervoirs for short term transient demands The supply provides a bipolar set of supply rails for each channel with equal quiescent positive and negative voltages as shown in Figure 1 7 Note that unlike...

Страница 13: ...ators in between for the best possible transfer of heat away from the transistors The emitters of the PNP and NPN transistors are coupled through resistors to the positive and negative supply rails re...

Страница 14: ...try it is vital to keep both running as mirror images A protection circuit monitors the balance between Channel 1 s and Channel 2 s signals Resistors R22 and R23 R22A R22B R23A and R23B in the ISA 750...

Страница 15: ...in series pairs instead of single 200 k components Bias circuitry The new circuitry see Figure 1 13 for the bias network features transistors Q108 and Q109 with surrounding resistors forming 8 mA curr...

Страница 16: ...r is turned on Channel 1 was most susceptible and various circumstances tended to aggravate the problem such as having the low frequency filters engaged having an accessory powered by the DataPort etc...

Страница 17: ...UTPUT BALANCE STROBE BALANCE V 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 A B NON INVERTING INPUT A V AMP BIAS INPUT B NON INVERTING INPUT B INVERTING INPUT B OUTPUT B BUFFER INPUT B BUFFER OUTPUT B V DIO...

Страница 18: ...1 2 3 B E C B C E TOSHIBA G D S B C E 2N3904 NPN and 2N3906 PNP Small signal transistors MJE15032 NPN and MJE15033 PNP Driver transistors IRFZ44 TMOS power field effect transistor 2SC5200 PNP and 2SA...

Страница 19: ...customer complains of blowing circuit breakers or fuses or burning smell or smoke Symptoms covered Fuses blow immediately The amplifier quickly gets very hot Line circuit breakers trip at turn on The...

Страница 20: ...hannel 2 are misadjusted Check R157 R158 R198 ISA750 and ISA800Ti only D115 and D116 Channel 1 or R157 R258 R298 ISA750 and ISA800Ti only D215 and D216 Channel 2 ISA280 ISA300Ti ISA450 and ISA500Ti Ch...

Страница 21: ...rail balancing problems Symptoms covered Insufficient or excessive current limiting into a shorted load Op amp rails too high with a shorted load Uneven voltages on supply rails A channel s output cu...

Страница 22: ...nly due to unequal rail voltages this voltage divider is the likely culprit Calibrations Adjust ISA280 ISA300T ISA300Ti ISA450 ISA500T ISA500Ti ISA750 ISA800T ISA800Ti ISA 1350 Channel 1 bias DC volta...

Страница 23: ...control 4 1 Setting bias Always set the bias after replacing any output or driver transistor after replacing any diode or resistor in the driver output circuitry if the amplifier seems to run too hot...

Страница 24: ...ical 6 Turn the gain control down If the amp has begun to warm up shut it off and let it cool a few minutes before proceeding with Channel 2 7 Repeat steps 1 through 5 for Channel 2 Use trimpots R239...

Страница 25: ...w the transistors and the clamps from the heat sink then unscrew the circuit boards from the mounting plate 8 Before reassembling the channel module assembly lightly apply fresh heat sink compound ove...

Страница 26: ...y 2006 100V and 120V only WP 002800 02 ISA 280 CHASSIS ASSY 230V 1 Before May 2006 230V only including UK WP 002800 03 ISA 280 CHAS ASSY 220V 60HZ 1 Before May 2006 220V Korea only WP 002803 00 ISA 28...

Страница 27: ...PUT ISA 120V 1 100V and 120V only Panelized assembly see WP 004502 00 list for individual channel modules WP 004502 02 PCB ASSY AC INPUT ISA 230V 1 230V including UK and Korea only Panelized assembly...

Страница 28: ...004502 02 PCB ASSY AC INPUT ISA 230V 1 230V including Korea and UK only Panelized assembly see WP 004502 02 list for individual channel modules XF 000193 GP PWR XFMR ISA 280 300T 1 Main PCB Assembly I...

Страница 29: ...7MM RED W STAND 2 LD100A LD200A QD 000198 GP LED 4 7MM GRN W STAND 3 LD1A LD101A LD201A QD 000201 GP DIODE LL4148 SM 35 D2 D7 D9 D14 D16 18 D102 D106 D111 D116 D119 D202 D206 D211 D216 D219 QD 000202...

Страница 30: ...22 R23 RE 239001 GP RMG 1 10W 39K 5 0805 2 R107 R207 RE 247004 GP RMG 1 8W 47K 5 1206 2 R125 R225 RE 268002 GP RMG 1 8W 68K 5 1206 1 R33 RE 315003 GP RMG 1 8W 150K 5 1206 3 R10 R104 R204 RE 315004 GP...

Страница 31: ...7 GP BRIDGE RECT 400V 25A 2 BR100 BR200 RE 000005 GP POLYSWITCH 1 1A 0 15 OHM 1 5W 1 R1 RE 000270 GP NTC 30A 1 OHM 1 R21 RE 010009 GP 100 OHM POT PCB MOUNT 1 R231 RE 012003 GP RMF 3W 120 OHM 5 AL META...

Страница 32: ...120V 1 WP 000305 02 ISA 300T CHASSIS ASSY 230V 1 WP 000305 03 ISA 300T CHAS ASSY 220V 60HZ 1 Chassis Assembly ISA300T 120V QSC part WP 000305 00 230V QSC part WP 000305 02 220V Korea QSC part WP 00030...

Страница 33: ...56001 GP CC 50V 56PF 10 0805 2 C110 C210 CA 056002 GP CTC 200V 56PF 5 1206 2 C111 C211 CA 118000 GP CC 50V 180PF 5 0805 4 C101 C103 C201 C203 CA 122005 GP CC 50V 220PF 5 0805 4 C20 C23 CA 210011 GP 0...

Страница 34: ...250V MJE15033 2 Q106 Q206 QD 000213 GP TR KST42 1 Q1 QD 000252 GP DIODE ZENER 25W 4 7V 4 D107 D110 D207 D210 RE 02201 GP 0 22 OHM 5 3W THK FLM 12 R142 R148 R149 R152 R153 R159 R242 R248 R249 R252 R25...

Страница 35: ...2 R107 R207 RE 247004 GP RMG 1 8W 47K 5 1206 2 R125 R225 RE 268002 GP RMG 1 8W 68K 5 1206 1 R33 RE 315003 GP RMG 1 8W 150K 5 1206 3 R10 R104 R204 RE 315004 GP RMG 1 8W 150K 1 1206 4 R118 R119 R218 R21...

Страница 36: ...0V 1 100V and 120V only WP 000325 02 ISA 300TI CHASSIS ASSY 230V 1 230V only except Korea WP 000325 03 ISA 300TI CHAS ASSY 220V 60HZ 1 Korea only Chassis Assembly ISA300Ti beginning June 2006 120V QSC...

Страница 37: ...120V only WP 004502 02 PCB ASSY AC INPUT ISA 230V 1 230V only XF 000193 GP PWR XFMR ISA 280 300T 1 XF 000268 GP LINE ISA XFMR ISA 300TI 2 Chassis Assembly ISA300Ti before June 2006 120V QSC part WP 0...

Страница 38: ...CB Assembly ISA300Ti QSC part WP 000326 00 This assembly is a panelized construction comprising the two channel modules built on a common perforated circuit board For the channel 1 module the one on t...

Страница 39: ...1 Q12 Q101 Q102 Q201 Q202 QD 000205 GP XISTOR PNP 40V 0 2A TR3906 SOT 23 6 Q4 Q5 Q7 Q13 Q100 Q200 QD 000206 GP DIOD RECT FAST IN4934 AT 4 D108 D109 D208 D209 QD 000207 GP XISTOR NPN 250V 0 5A MJE15032...

Страница 40: ...10W 20K 1 0805 5 R52 R150 R151 R250 R251 RE 224001 GP 24 0K 1 1 10W THK FLM 0805 5 R19 R117 R121 R217 R221 RE 233001 GP RMG 1 8W 33K 1 1206 2 R22 R23 RE 239001 GP RMG 1 10W 39K 5 0805 2 R107 R207 RE...

Страница 41: ...CHASSIS ASSY 230V 1 Before May 2006 230V only WP 004500 03 ISA 450 CHAS ASSY 220V 60HZ 1 Before May 2006 220V Korea only WP 004503 00 ISA 450 CHASSIS ASSY 120V 1 Beginning May 2006 100V and 120V only...

Страница 42: ...004500 03 QSC Part Description Qty Reference Comments CH 000153 GP CHASSIS FAB ISA 1 CH 000166 GP RACK EAR ISA 2 CH 000173 GP COVER XFMR STEEL LARGE 1 CH 000178 GP PROTECT COVER 1 CO 000211 GP AC INL...

Страница 43: ...20 0805 1 C5 CA 322006 GP CM 50V 022UF 5 RL 4 C116 C119 C216 C219 CA 322007 GP CC 50V 022UF 10 0805 2 C125 C225 CA 368004 GP 0 068UF 5 250V FILM DIPPED 2 C124 C224 CA 410013 GP CER 2 1206 10 50V 1UF...

Страница 44: ...OHM 5 5 R20 R146 R147 R246 R247 RE 000003 GP RMG 1 10W 0 OHM 5 0805 2 R265 R266 RE 000004 GP RMG 1 8W 0 OHM 5 1206 1 R53 RE 000250 GP NTC RES 50 OHM 2 R134 R234 RE 000260 GP THERMAL PTC 60C 100 OHM 2...

Страница 45: ...R218 R219 RE 322001 GP RMG 1 8W 220K 5 1206 1 R27 RE 322002 GP RMG 1 10W 220K 5 0805 1 R26 RE 330001 GP RMG 1 8W 330K 5 1206 1 R18 RE 347002 GP RMF 1 8W 470K 5 ATS 1 R15 RE 368001 GP RMG 1 8W 680K 1...

Страница 46: ...P 000505 02 ISA 500T CHASSIS ASSY 230V 1 WP 000505 03 ISA 500T CHAS ASSY 220V 60HZ 1 Chassis Assembly ISA 500T 120V QSC part WP 000505 00 230V QSC part WP 000505 02 220V Korea QSC part WP 000505 03 QS...

Страница 47: ...nts CA 056001 GP CC 50V 56PF 10 0805 2 C110 C210 CA 056002 GP CTC 200V 56PF 5 1206 2 C111 C211 CA 118000 GP CC 50V 180PF 5 0805 4 C101 C103 C201 C203 CA 122005 GP CC 50V 220PF 5 0805 4 C20 C23 CA 2100...

Страница 48: ...5200 8 Q104 Q108 Q110 Q112 Q204 Q208 Q210 Q212 QD 000210 GP XISTOR PNP 250V MJE15033 2 Q106 Q206 QD 000213 GP TR KST42 1 Q1 QD 000252 GP DIODE ZENER 25W 4 7V 4 D107 D110 D207 D210 RE 02201 GP 0 22 OHM...

Страница 49: ...7004 GP RMG 1 8W 47K 5 1206 2 R125 R225 RE 268002 GP RMG 1 8W 68K 5 1206 1 R33 RE 315003 GP RMG 1 8W 150K 5 1206 3 R10 R104 R204 RE 315004 GP RMG 1 8W 150K 1 1206 4 R118 R119 R218 R219 RE 322001 GP RM...

Страница 50: ...TI CHASSIS ASSY 120V 1 WP 000525 02 ISA 500TI CHASSIS ASSY 230V 1 WP 000525 03 ISA 500TI CHAS ASSY 220V 60HZ 1 Chassis Assembly ISA500Ti 120V QSC part WP 000525 00 230V QSC part WP 000525 02 220V Kore...

Страница 51: ...hannel modules built on a common perforated circuit board For the channel 1 module the one on top order PCB QZ050C PWR1 for the channel 2 module the one underneath order PCB QZ050C PWR2 QSC Part Descr...

Страница 52: ...06 GP DIOD RECT FAST IN4934 AT 4 D108 D109 D208 D209 QD 000207 GP XISTOR NPN 250V 0 5A MJE15032 3 Q10 Q105 Q205 QD 000208 GP XISTOR PNP 230V 5A 2SA1943 8 Q103 Q107 Q109 Q111 Q203 Q207 Q209 Q211 QD 000...

Страница 53: ...5 R19 R117 R121 R217 R221 RE 233001 GP RMG 1 8W 33K 1 1206 2 R22 R23 RE 239001 GP RMG 1 10W 39K 5 0805 2 R107 R207 RE 247004 GP RMG 1 8W 47K 5 1206 2 R125 R225 RE 268002 GP RMG 1 8W 68K 5 1206 1 R33 R...

Страница 54: ...7500 02 ISA 750 CHASSIS ASSY 230V 1 230V only including UK WP 007500 03 ISA 750 CHAS ASSY 220V 60HZ 1 220V Korea only WP 007503 00 ISA 750 CHASSIS ASSY 120V 1 100V and 120V only WP 007503 02 ISA 750 C...

Страница 55: ...XFMR STEEL LARGE 1 CH 000178 GP PROTECT COVER 1 CO 000211 GP AC INLET 250V 15A 1 CO 000218 GP 6 POLE SPEAKER TERMINAL 1 LB 000355 GP LABEL GROUND 1 LB 000410 GP LABEL UL LISTED 1 LB 000449 GP LABEL RE...

Страница 56: ...50V 01UF 20 0805 3 C5 C181 C281 CA 322006 GP CM 50V 022UF 5 RL 4 C116 C119 C216 C219 CA 322007 GP CC 50V 022UF 10 0805 2 C133 C233 CA 368004 GP 0 068UF 5 250V FILM DIPPED 4 C124 C126 C224 C226 CA 3820...

Страница 57: ...215 GP DIODE MUR1520 15A 200V 4 D175 D176 D275 D276 QD 000216 GP THYRISTOR 200V 0 1W 2N5064 2 D219 D220 QD 000217 GP DIODE 400V 3A IN5404 DO 201AD 4 D117 D118 D217 D218 QD 000218 GP DIOD ZNR 3 8 4 0V...

Страница 58: ...R207 RE 247004 GP RMG 1 8W 47K 5 1206 2 R125 R225 RE 247005 GP RMG 1 10W 47K 5 0805 4 R176 R183 R276 R283 RE 268002 GP RMG 1 8W 68K 5 1206 5 R33 R22A R22B R23A R23B RE 315003 GP RMG 1 8W 150K 5 1206...

Страница 59: ...R50B RE 010009 GP 100 OHM POT PCB MOUNT 1 R131 RE 012003 GP RMF 3W 120 OHM 5 AL METAL 1 R17 RE 110013 GP RMG 1 10W 1K 1 0805 1 R50A RE 120003 GP RCF 1 8W 2K 5 ATS 1 R13 RE 122006 GP SVR 2 2K H3 7X7 2...

Страница 60: ...nd 120V only WP 000805 02 ISA 800T CHASSIS ASSY 230V 1 230V only except Korea WP 000805 03 ISA 800T CHASSIS ASSY 220V 60HZ 1 220V Korea Chassis Assembly ISA800T 120V QSC part WP 000805 00 230V QSC par...

Страница 61: ...201 C203 CA 210012 GP CM 100V 001UF 5 RL 5X 2 C131 C231 CA 215004 GP CM 250V 0015UF 5 RL 2 C114 C214 CA 222007 GP 50V 0022UF 10 1206 4 C115 C117 C215 C217 CA 233004 GP CM 50V 0033UF 5 RL 4 C172 C179 C...

Страница 62: ...208 GP XISTOR PNP 230V 5A 2SA1943 8 Q103 Q107 Q109 Q111 Q203 Q207 Q209 Q211 QD 000209 GP XISTOR NPN 230V 5A 2SC5200 8 Q104 Q108 Q110 Q112 Q204 Q208 Q210 Q212 QD 000210 GP XISTOR PNP 250V MJE15033 2 Q1...

Страница 63: ...182002 GP RMF 5W 8 2K 5 AL METAL 8 R118 R119 R133 R135 R218 R219 R233 R235 RE 210007 GP 10K 1 1 10W THK FLM 0805 20 R22 R23 R31 R34 R38 R100 R101 R103 R105 R106 R128 R200 R201 R203 R205 R206 R228 RE...

Страница 64: ...A 800TI CHASSIS ASSY 120V 1 100V and 120V only WP 000825 02 ISA 800TI CHASSIS ASSY 230V 1 230V only Chassis Assembly ISA800Ti 120V QSC part WP 000825 00 230V QSC part WP 000825 02 220V Korea QSC part...

Страница 65: ...200V 27PF 5 1206 2 C111 C211 CA 047005 GP CC 50V 47PF 5 0805 6 C170 C176 C177 C270 C276 C277 CA 056001 GP CC 50V 56PF 10 0805 2 C110 C210 CA 110004 GP CC 50V 100PF 10 0805 2 C9 C132 CA 110005 GP CC 50...

Страница 66: ...4 SOT 23 16 Q5 Q8 Q9 Q11 Q12 Q16 Q18 Q101 Q102 Q171 Q173 Q201 Q202 Q271 Q273 QD 000205 GP XISTOR PNP 40V 0 2A TR3906 SOT 23 12 Q4 Q6 Q7 Q13 Q15 Q100 Q172 Q175 Q200 Q272 Q275 QD 000206 GP DIOD RECT FAS...

Страница 67: ...51003 GP RMF 5W 5 1K 5 AL METAL 4 R180 R188 R280 R288 RE 159003 GP 5 9K 1 1 10W THK FLM 0805 4 R171 R184 R271 R284 RE 175003 GP RMG 1 10W 7 5K 5 0805 2 R108 R208 RE 182002 GP RMF 5W 8 2K 5 AL METAL 8...

Страница 68: ...y May 2006 and later Chassis Assembly ISA1350 beginning May 2006 120V QSC part WP 013503 00 230V QSC part WP 013503 02 220V Korea QSC part WP 013503 03 QSC Part Description Qty Reference Comments LB 0...

Страница 69: ...H 000231 GP PCB HOLDER RMX 4050HD 1 CH 000232 GP HEATSINK RMX 4050HD 1 CH 000247 GP CLAMP TRANSISTER 6 FINGER 1 CH 000248 GP CLAMP TRANSISTER 4 FINGER 1 CH 000308 GP NTC HOLDER 1 CH 000389 GP CHASSIS...

Страница 70: ...5 R6 QD 000197 GP LED 4 7MM RED W STAND 1 LD5 QD 000198 GP LED 4 7MM GRN W STAND 3 LD1 LD3 LD6 QD 000200 GP DIODE RECT 1A 200V DB103 2 BR7 BR8 QD 000201 GP DIODE LL4148 SM 6 D1 D6 QD 000203 GP DIOD ZN...

Страница 71: ...2 R50 R112 RE 112001 GP RMG 1 10W 1 2K 1 0805 1 R111 RE 115006 GP 1 5K 1 1 8W THK FLM 1206 3 R23 R26 R27 RE 115008 GP 1 5K 1 PCNT 1 10W THK FLM 0805 100V 1 R211 RE 116902 GP 1 69K 1 1 4W AT 1 R19 RE 1...

Страница 72: ...ISATI ISA SERIES NEW 1 TD 000900 AX WARRANTY CARD GENERIC 1 TS 000004 WR 3 YEARS WARRANTY 3 WC 0 6023 GP 0 6 JUMPER 23AWG 16 J34 J45 J53 J56 WC 000181 GP AC CORD 15A ISA 1 WC 000183 GP SLEEVE 7086 2...

Страница 73: ...Technical Service Manual 71 ISA Series Power Amplifiers Chassis assembly ISA280 7 Schematics and diagrams 7 1 ISA Series Chassis Assemblies...

Страница 74: ...72 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA280 ISA300T...

Страница 75: ...Technical Service Manual 73 ISA Series Power Amplifiers Chassis assembly ISA300T M4 X 20MM 46...

Страница 76: ...74 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA300Ti...

Страница 77: ...Technical Service Manual 75 ISA Series Power Amplifiers Chassis assembly ISA300Ti...

Страница 78: ...76 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA450...

Страница 79: ...Technical Service Manual 77 ISA Series Power Amplifiers Chassis assembly ISA450...

Страница 80: ...78 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA500T M4 X 20MM 46...

Страница 81: ...Technical Service Manual 79 ISA Series Power Amplifiers Chassis assembly ISA500T ISA500Ti...

Страница 82: ...80 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA500Ti M4 X 20MM 46...

Страница 83: ...Technical Service Manual 81 ISA Series Power Amplifiers Chassis assembly ISA750...

Страница 84: ...82 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA750...

Страница 85: ...Technical Service Manual 83 ISA Series Power Amplifiers Chassis assembly ISA800T M4 X 20MM 46...

Страница 86: ...84 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA800T...

Страница 87: ...Technical Service Manual 85 ISA Series Power Amplifiers Chassis assembly ISA800Ti...

Страница 88: ...86 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA800Ti...

Страница 89: ...Technical Service Manual 87 ISA Series Power Amplifiers Chassis assembly ISA1350...

Страница 90: ...88 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA1350...

Страница 91: ...Technical Service Manual 89 ISA Series Power Amplifiers Chassis assembly ISA1350...

Страница 92: ...90 QSC Audio Products LLC TD 000163 00 Rev B Chassis assembly ISA1350...

Страница 93: ...Technical Service Manual 91 ISA Series Power Amplifiers...

Страница 94: ...92 QSC Audio Products LLC TD 000163 00 Rev B...

Страница 95: ...Technical Service Manual 93 ISA Series Power Amplifiers...

Страница 96: ...94 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 280 Early version page 1 of 3 7 2 ISA280 1st generation Schematics...

Страница 97: ...Technical Service Manual 95 ISA Series Power Amplifiers Gray shading indicates signal path ISA 280 Early version page 2 of 3...

Страница 98: ...96 QSC Audio Products LLC TD 000163 00 Rev B ISA 280 Early version page 3 of 3...

Страница 99: ...Technical Service Manual 97 ISA Series Power Amplifiers Gray shading indicates signal path ISA 280 Revised version March 2003 page 1 of 3 7 3 ISA280 revised Schematics...

Страница 100: ...98 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 280 Revised version page 2 of 3 March 2003...

Страница 101: ...Technical Service Manual 99 ISA Series Power Amplifiers ISA 280 Revised version page 3 of 3 March 2003...

Страница 102: ...D FILE NO SH8001ra sch REV A ISA 300T page 1 of 3 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION THAT IS THE PROPERTY OF QSC AUDIO PRODUCTS WHICH MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRES...

Страница 103: ...EV A ISA 300T page 2 of 3 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION THAT IS THE PROPERTY OF QSC AUDIO PRODUCTS WHICH MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM Q...

Страница 104: ...RED WHT WHT J3A TABLE 1 AC LINE VOLTAGE POWER TRANSFORMER PRIMARY LEAD COLOR TAB 100V 120V 240V CIRCUIT BREAKER 15A 125V 15A 125V 7 5A 250V R21 1 OHM 30A 1 OHM 30A 2 5 OHM 15A R21A 0 OHM JUMPER 0 OHM...

Страница 105: ...Technical Service Manual 103 ISA Series Power Amplifiers Gray shading indicates signal path ISA 300Ti page 1 of 3 7 5 ISA300Ti Schematics...

Страница 106: ...104 QSC Audio Products LLC TD 000163 00 Rev B ISA 300Ti page 3 of 3...

Страница 107: ...Technical Service Manual 105 ISA Series Power Amplifiers ISA 300Ti page 3 of 3...

Страница 108: ...106 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 450 Early version page 1 of 3 7 6 ISA450 1st generation Schematics...

Страница 109: ...Technical Service Manual 107 ISA Series Power Amplifiers Gray shading indicates signal path ISA 450 Early version page 2 of 3...

Страница 110: ...108 QSC Audio Products LLC TD 000163 00 Rev B ISA 450 Early version page 3 of 3...

Страница 111: ...Technical Service Manual 109 ISA Series Power Amplifiers Gray shading indicates signal path ISA 450 Revised version March 2003 page 1 of 3 7 7 ISA450 revised Schematics...

Страница 112: ...110 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 450 Revised version March 2003 page 2 of 3...

Страница 113: ...Technical Service Manual 111 ISA Series Power Amplifiers ISA 450 Revised version March 2003 page 3 of 3...

Страница 114: ...SW1 10 PARALLEL INPUTS 4 5 BRIDGE MONO 6 7 FILTER BYPASS B 8 FILTER 30 HZ 9 CLIP LIM B 10 J101 CH1_ IN CH1_ IN CHASSIS_GND 2 3 1 PC 004508 00 INPUT PCB TO J421 PIN TO PIN SH 3 IN A IN A J400 1 J400 2...

Страница 115: ...PPROX 40MA TO HD 15 PORT BR MONO RETURN CAUTION SENSITIVE NODE SW GND FOR CLIP LIM J401 1 J108 1 J401 2 J108 2 J401 3 J108 3 J421 2 J421 1 J421 3 J422 2 J345 2 J422 3 J345 3 J423 2 J348 2 J422 1 J345...

Страница 116: ...J7A BLU BLK J2A RED WHT WHT J3A TABLE 1 AC LINE VOLTAGE POWER TRANSFORMER PRIMARY LEAD COLOR TAB 100V 120V 240V CIRCUIT BREAKER 15A 125V 15A 125V 7 5A 250V R21 1 OHM 30A 1 OHM 30A 2 5 OHM 15A R21A 0 O...

Страница 117: ...Technical Service Manual 115 ISA Series Power Amplifiers ISA 500Ti page 1 of 3 Gray shading indicates signal path 7 9 ISA500Ti Schematics...

Страница 118: ...116 QSC Audio Products LLC TD 000163 00 Rev B ISA 500Ti page 2 of 3 Gray shading indicates signal path...

Страница 119: ...Technical Service Manual 117 ISA Series Power Amplifiers ISA 500Ti page 3 of 3...

Страница 120: ...118 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 750 Early version page 1 of 3 7 10 ISA750 1st generation Schematics...

Страница 121: ...Technical Service Manual 119 ISA Series Power Amplifiers Gray shading indicates signal path ISA 750 Early version page 2 of 3...

Страница 122: ...120 QSC Audio Products LLC TD 000163 00 Rev B ISA 750 Early version page 3 of 3...

Страница 123: ...Technical Service Manual 121 ISA Series Power Amplifiers Gray shading indicates signal path ISA 750 Revised version March 2003 page 1 of 3 7 11 ISA750 revised Schematics...

Страница 124: ...122 QSC Audio Products LLC TD 000163 00 Rev B Gray shading indicates signal path ISA 750 Revised version March 2003 page 2 of 3...

Страница 125: ...Technical Service Manual 123 ISA Series Power Amplifiers ISA 750 Revised version March 2003 page 3 of 3...

Страница 126: ...IN SH 3 IN A IN A J400 1 J400 2 J400 3 J1 1 J1 2 J1 3 J203 1 J203 2 J203 3 1 2 3 1 2 3 GND IN A IN A J1 4 J203 4 J1 5 J203 5 J1 6 J203 6 J1 7 J203 7 J1 8 J203 8 J1 9 J203 9 J1 10 J203 10 J1 11 J203 11...

Страница 127: ...INEAR GAIN POT CH 2 LINEAR GAIN POT R112 2 5K R212 2 5K SERIES REGULATOR SUPPLIES APPROX 40MA TO HD 15 PORT CONNECTS TO LOWER POS RAIL ON SAME SIDE AS DISPLAY LEDs BR MONO RETURN CAUTION SENSITIVE NOD...

Страница 128: ...WER SWITCH IEC AC INLET LINE NEUT GND 20 VAC TO FAN POWER RECTIFIER 28V PRI SIDE DC FAN SUPPLY R4 60 C 100 ATTACH TO CH 2 HEAT SINK R7 60 C 100 ATTACH TO CH 1 HEAT SINK MAINTAIN FULL PRI SEC CREEPAGE...

Страница 129: ...Technical Service Manual 127 ISA Series Power Amplifiers ISA800Ti page 1 of 3 Gray shading indicates signal path 7 13 ISA800Ti Schematics...

Страница 130: ...128 QSC Audio Products LLC TD 000163 00 Rev B ISA800Ti page 2 of 3 Gray shading indicates signal path...

Страница 131: ...Technical Service Manual 129 ISA Series Power Amplifiers ISA800Ti page 3 of 3...

Страница 132: ...130 QSC Audio Products LLC TD 000163 00 Rev B Channel 2 Channel 1 7 14 ISA750 ISA800T ISA800Ti Component locations...

Страница 133: ...Technical Service Manual 131 ISA Series Power Amplifiers Channel 2 Channel 1...

Страница 134: ...132 QSC Audio Products LLC TD 000163 00 Rev B ITEM NO QTY PART NO DESCRIPTION VENDOR 7 15 ISA1350 Schematics...

Страница 135: ...Technical Service Manual 133 ISA Series Power Amplifiers...

Страница 136: ...134 QSC Audio Products LLC TD 000163 00 Rev B...

Страница 137: ...Technical Service Manual 135 ISA Series Power Amplifiers...

Страница 138: ...136 QSC Audio Products LLC TD 000163 00 Rev B 7 16 ISA1350 Component locations...

Страница 139: ...Technical Service Manual 137 ISA Series Power Amplifiers...

Страница 140: ...138 QSC Audio Products LLC TD 000163 00 Rev B...

Страница 141: ......

Страница 142: ...QSC and the QSC logo are registered trademarks of QSC Audio Products LLC 1665 MacArthur Blvd Costa Mesa CA 92626 800 772 2834 FAX 714 754 6173 www qscaudio com...

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