Crown Micro-Tech MT-600 Service Manual Download Page 29

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Micro-Tech 600 Amplifier Service Manual

R116

R216

A10266-3351

3.3M

R118

R218

A10266-2711

270 OHM

R119

R219

A10266-3011

300 OHM

R120

R220

A10266-2711

270 OHM

R121

R221

C 5062-2

100K TRIM

R122

R222

A10266-2741

270K

R123

R223

A10266-1831

18K

R124

R224

A10266-6821

6.8K

R125

R225

C 7782-3

100 OHM

R126

R226

C 7782-3

100 OHM

R127

R227

A10266-6821

6.8K

R128

R228

A10266-1031

10K

R129

R229

A10266-1041

100K

R130

R230

A10266-1041

100K

R131

R231

A10266-1031

10K

R132

R232

C 5062-2

100K TRIM

R133

R233

A10266-2741

270K

R134

R234

A10266-1831

18K

R135

R235

C 7782-3

100 OHM

R136

R236

A10266-6821

6.8K

R137

R237

C 7782-3

100 OHM

R138

R238

A10266-6821

6.8K

R139

R239

A10266-1021

R140

R240

A10266-8201

82 OHM

R141

R241

A10266-1541

150K

R142

R242

A10266-1541

150K

R146

R246

A10266-1031

10K

R147

R247

C 7781-5

200 OHM

R148

R248

A10266-2721

2.7K

R149

R249

C 7781-5

200 OHM

R150

R250

A10266-2721

2.7K

R151

R251

A10266-1031

10K

R152

R252

A10266-1231

12K

R154

R254

A10266-1011

100 OHM

R156

R256

A10266-1321

1.3K

R157

R257

A10266-1321

1.3K

R158

R258

A10266-9121

9.1K

R159

R259

A10266-1031

10K

R161

R261

A10266-4701

47 OHM

R162

R262

A10266-4701

47 OHM

R165

R265

A10265-53611

5.36K 1%

R166

R266

A10265-53611

5.36K 1%

R167

R267

A10266-1021

R168

R268

A10265-95301

953 OHM

R170

R270

A10266-1021

R171

R271

A10265-95301

953 OHM

SWITCHES

C 6841-8

4PDT

S100

C 6781-6

6P3T

INTEGRATED CIRCUITS

C 5095-2

MC7815

C 5096-0

MC7915

U100

U200

C 6500-0

UPA77 PNP

U103

U203

C 6910-1

UPA76 NPN

U104

U204

C 6900-2

MC34084P

CONNECTORS

C 6871-5

6-Pin Conn.

J100

J200

C 6777-4

Phone Jk.

J500

J800

D 6619-7

10" Ribbon

J600

J700

D 6620-5

6" Ribbon

MOUNTS U1, U2

(2)

C 1889-2 6-32 NUT

(2)

C 2176-3 6-32 X .5 SCREW

(2)

C 5341-0 HEATSINK

(2)

C 5594-4 STAR WASHER

MOUNTS U104, U204

(2)

C 3450-1 14 PIN SOCKET

COVERS FOR J100, J200

(2)

C 6778-2 COVER, PHONE JACK

MISC

(1)

C 4508-5 16 PIN SOCKET

(1)

C 5061-4 1N3070 DIODE

(1)

C 6851-7 5-Position .1 Center Header

(1)

C 7077-8 3-Conductor Wire Retainer
C 6899-6 Wire Posts

BLANK CIRCUIT BOARD

D 6304A4 or D 6304B2

Q42552A0 Main Module (D6304A4/D6304B2 board) Parts List Cont.

Summary of Contents for Micro-Tech MT-600

Page 1: ...R AMPLIFIER SERVICE MANUAL K SVCMT6 8 95 Micro Tech ODEP and Crown are registered trademarks of Crown International Inc MailingAddress P O Box 1000 Elkhart IN U S A 46515 1000 ShippingAddress 57620 C...

Page 2: ...SS GAIN SWITCH CAUTION AVIS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE The information furnished in this manual does not include all of the details o...

Page 3: ...Non Module 17 Module and Schematic Information 20 Fuse and Display Modules 21 Q42549 8 Output Module 22 Q42647 0 Output Module 23 Q42717 1 Output Module 24 Q42817 6 Output Module 25 Q42968 0 Output Mo...

Page 4: ...sts Schematics are attached Note that com ponent parts with circuit board comprise a complete module Module part numbers are always associated with a specific circuit board although an unpopulated cir...

Page 5: ...a four character number after the prefix letter the space is considered a character The seventh character is usually a hy phen though it may be a letter to indicate a revision or specialnote Thelastc...

Page 6: ...hms unbalanced Output Impedance 10 milliohms in series with 2 microhenries Protection Systems Output Device Emulation Protec tion ODEP limits drive in the event of dangerous dynamicthermalconditionswi...

Page 7: ...boards The following chart indicates which jumpers are used for different voltages Note that the fuses and transmotor may need to be changed to accommodate different voltages Versions with the voltage...

Page 8: ...l and are of the rotary type Front panel indicators let the user know the status of the low voltage power supply enable and an ODEP indicator for each channel which shows the reserve energy status In...

Page 9: ...ODEP transistors steal drive as dictated by the ODEP circuitry discussed later The control protec tion transistors act as switches to totally shunt audio to ground during the turn on delay or during a...

Page 10: ...bias resistor is slightly greater in value so that PNP output devices run closer Theory Vcc Positive Rail Vcc Negative Rail Load speaker Input signal HIGH SIDE LOW SIDE Inverting Op amp Figure 2 Crown...

Page 11: ...to the speaker load which is twice the voltage produced by the power supply Benefits include full utilization of the power supply it conducts current during both halves of the output signal convention...

Page 12: ...PNP STAGE POSITIVE HIGH SIDE OUTPUT NPN STAGE HIGH SIDE BIAS SERVO LVA 1 LVA 1 VOLTAGE TRANSLATOR VOLTAGE TRANSLATOR OUTPUT DEVICE EMULATION PROTECTION ERROR AMP VGS BGS BALANCED INPUTS INVERTING BRI...

Page 13: ...mVDC Initial Conditions Controls per standard heatsink tem perature less than 40 C Procedure Measure DC voltages on the output module across R02 adjust R26 if necessary Measure DC voltages on the out...

Page 14: ...itial Conditions Controls per standard 8 ohm load on each channel Procedure Inject a 1 kHz sine wave and adjust for 1 Watt output 2 8 VAC Check input and output signals against each other input and ou...

Page 15: ...miting wave form either channel controls limiting in Parallel Mono Mode Initial Conditions Controls per standard rag or other obstruction blocking fan so that it does not turn Procedure Load the ampli...

Page 16: ...kHz portion to 25 With an IM analyzer measure less than 0 01 IMD Repeat test at 35 dB reference 34 7 Volt RMS 60 Hz portion and measure less than 0 05 IMD TEST 20 CLIPPING Spec No protective action d...

Page 17: ...w for 50 60Hz power transformer 8 A10101 19 500OD x 195ID Fiber Washer 4 H42873 2 Transmotor 120V 60Hz Only 1 H43068 8 Transmotor 100V Units Only 1 H43407 8 Transmotor 120V 50Hz Only 1 H43061 3 Transm...

Page 18: ...wer Cord European Version 1 A10214 7 Strain Relief 1 C 2823 0 Dual Binding Post 2 D 7600 6 Dual Banana Ground Strap 1 CHASSIS FRONT ASSEMBLY CPN ITEM QTY C 6487 0 Power Switch 2 Pole 22 Amp Rocker 1 D...

Page 19: ...2 8 32 x 750 Taptite Pan Head Screw 2 A10192 1 500 Snap Bushing 4 A11376 6130J 13 inch Black Output Wire 1 A11376 6235J 23 inch Black Output Wire 1 A11394 6160E 16 inch Red Output Wire 1 A11394 6235E...

Page 20: ...e Q42776 7 as service replacement Q42776 7 Main module on D 7251 8 board Used as a replace ment for all older modules Q42983 9 Main module on D 7911 7 board No longer available use Q43033 2 as service...

Page 21: ...NSISTORS Q504 Q604 C 3625 8 2N4125 PNP IC S U502 C 5070 5 TL072CP Op Amp MISC U502X C 4508 5 16 Pin IC Socket Board D 8030 5 MT Display Bd M43534 3 FUSE MODULE CPN Item Qty C 5060 6 PC Mount Fuse Clip...

Page 22: ...09 C 4479 9 22 R10 A10266 4711 470 R11 A10266 2R73 2 7 1W R12 A10266 2R73 2 7 1W R13 A10266 7501 75 R14 A10266 2R73 2 7 1W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C...

Page 23: ...2 5W R09 C 7779 9 22 FP R10 A10266 4711 470 R11 A10266 2R73 2 7 1W R12 A10266 2R73 2 7 1W R13 A10266 7501 75 R14 A10266 2R73 2 7 1W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2...

Page 24: ...1W R12 A10266 1204 12 2W R13 A10266 7501 75 R14 A10266 1204 12 2W R15 C 6486 2 2 5W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R18 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C 7778 1 5 6 FP R22 C...

Page 25: ...66 1204 12 2W R13 A10266 7501 75 R14 A10266 1204 12 2W R15 C 6486 2 2 5W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R18 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C 7778 1 5 6 FP R22 C 7779 9 22 F...

Page 26: ...7 1W R12 A10266 1204 12 2W R13 A10266 7501 75 R14 A10266 1204 12 2W R15 C 6486 2 2 5W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R18 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C 7778 1 5 6 FP R22...

Page 27: ...7 2W R12 A10266 1204 12 2W R13 A10266 7501 75 R14 A10266 1204 12 2W R15 C 6486 2 2 5W R16 C 6486 2 2 5W R17 C 6486 2 2 5W R18 C 6486 2 2 5W R19 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C 7778 1 5 6 FP R22...

Page 28: ...N4148 D112 D212 C 3181 2 1N4148 D113 D213 C 3181 2 1N4148 D114 D214 C 3181 2 1N4148 D115 D215 C 3181 2 1N4148 D120 D220 C 3181 2 1N4148 D121 D221 C 3181 2 1N4148 D122 D222 C 3181 2 1N4148 D123 D223 C...

Page 29: ...6 1231 12K R154 R254 A10266 1011 100 OHM R156 R256 A10266 1321 1 3K R157 R257 A10266 1321 1 3K R158 R258 A10266 9121 9 1K R159 R259 A10266 1031 10K R161 R261 A10266 4701 47 OHM R162 R262 A10266 4701 4...

Page 30: ...1 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D7 C 2851 1 1N4004 D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206 C 2851 1 1N4004 D107 D207 C 2851...

Page 31: ...K R146 R246 A10266 1031 10K R147 R247 C 7781 5 200 OHM R148 R248 A10266 2721 2 7K R149 R249 C 7781 5 200 OHM R150 R250 A10266 2721 2 7K R151 R251 A10266 1031 10K R152 R252 A10266 1231 12K R153 R253 C...

Page 32: ...250 OPEN C151 C251 OPEN C152 C252 C 6809 5 220pF C153 C253 C 6804 6 1 F DIODES D1 C 2851 1 1N4004 D2 C 2851 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D7 C 28...

Page 33: ...227 A10266 6821 6 8K R128 R228 A10266 1031 10K R129 R229 A10266 1041 100K R130 R230 A10266 1041 100K R131 R231 A10266 1031 10K R132 R232 C 5062 2 100K Trim R133 R233 A10266 2741 270K R134 R234 A10266...

Page 34: ...J9 C 7527 2 HDR 6 PIN J10 C 7592 6 HDR 4 PIN J11 C 7526 4 HDR 3 PIN J100 J200 C 6777 4 PH JACK J500 J800 D 6619 7 10 Ribbon J600 J700 D 6620 5 6 Ribbon MISC MOUNTS U1 U2 2 C 1889 2 6 32 NUT 2 C 2176...

Page 35: ...F C 149 C249 C 6808 7 470pF C150 C250 C 6806 1 01 F C151 C251 C 6806 1 01 F C152 C252 C 6950 7 82pF C153 C253 C 6804 6 1 F C154 C254 C 8426 6 1 F 250V C155 C255 C 6804 6 1 F C156 C256 C 6804 6 1 F C15...

Page 36: ...1031 10K R132 R232 C 5062 2 100K Trim R133 R233 A10266 2741 270K R134 R234 A10266 1832 18K 5W R135 R235 C 7782 3 100 OHM R136 R236 A10266 6821 6 8K R137 R237 C 7782 3 100 OHM R138 R238 A10266 6821 6 8...

Page 37: ...10 OHM R916 R1016 A10266 1001 10 OHM SWITCHES S2 C 7325 1 DPDT SIDE S3 C 7960 5 DP3T S100 C 6781 6 6P3T INTEGRATED CIRCUITS U1 C 5095 2 MC7815 U2 C 5096 0 MC7915 U100 U200 C 6911 9 UPA75 PNP U101 U20...

Page 38: ...1 F C151 C251 C 6806 1 01 F C152 C252 C 6950 7 82pF 5 C153 C253 C 8897 8 1 F C154 C254 C 8426 6 1 F 250V C155 C255 C 8897 8 1 F C156 C256 C 8897 8 1 F C157 C257 C 6806 1 01 F DIODES D1 C 2851 1 1N4004...

Page 39: ...30 R230 A10266 1041 100K R131 R231 A10266 1031 10K R132 R232 C 5062 2 100K Pot ODEP R133 R233 A10266 2741 270K R134 R234 A10266 1832 18K 5W R135 R235 C 7782 3 100 Flame Proof R136 R236 A10266 6821 6 8...

Page 40: ...R916 R1016 A10266 3901 39 R917 R1017 A10266 10021 10K R918 R1018 A10266 10021 10K R919 R1019 A10266 10021 10K R920 R1020 A10266 10021 10K R921 R1021 C 9079 2 200 Pot CMR Null SWITCHES S2 C 7325 1 Grou...

Page 41: ...1 F C151 C251 C 6806 1 01 F C152 C252 C 6950 7 82pF 5 C153 C253 C 8897 8 1 F C154 C254 C 8426 6 1 F 250V C155 C255 C 8897 8 1 F C156 C256 C 8897 8 1 F C157 C257 C 6806 1 01 F DIODES D1 C 2851 1 1N4004...

Page 42: ...30 R230 A10266 1041 100K R131 R231 A10266 1031 10K R132 R232 C 5062 2 100K Pot ODEP R133 R233 A10266 2741 270K R134 R234 A10266 1832 18K 5W R135 R235 C 7782 3 100 Flame Proof R136 R236 A10266 6821 6 8...

Page 43: ...R916 R1016 A10266 3901 39 R917 R1017 A10266 10021 10K R918 R1018 A10266 10021 10K R919 R1019 A10266 10021 10K R920 R1020 A10266 10021 10K R921 R1021 C 9079 2 200 Pot CMR Null SWITCHES S2 C 7325 1 Grou...

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