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Macro-Tech 1200 Amplifier Service Manual

45

Q43036-5 Main Module (D7993-5 board) Parts List Cont.

Q122 Q222 C 7458-0

NPN 2N4123

Q123 Q223 C 7458-0

NPN 2N4123

Q124 Q224 C 3625-8

NPN 2N4125

Resistors

(.25W 5% unless
noted otherwise)

N101

N201

D 7946-3

Network Package

N102

N202

D 6082-8

Network Package

R1

A10265-53621 53.6K 1%

R2

C 7340-0

24 5W

R3

C 7340-0

24 5W

R4

A10265-46421 46.4K 1%

R7

A10266-1041

100K

R8

A10266-2031

20K

R9

A10266-5121

5.1K

R16

A10266-5121

5.1K

R17

A10266-2031

20K

R18

A10266-1041

100K

R100

R200

C 7592-6

4 Pin Header (Level)

R101

R201

A10265-49911 4.99K 1%

R102

R202

A10266-5111

510

R103

R203

A10265-10031 100K 1%

R104

R204

A10266-2721

2.7K

R105

R205

A10266-2721

2.7K

R106

R206

A10266-1231

12K

R107

R207

A10266-6831

68K

R108

R208

A10266-8211

820

R109

R209

A10266-6801

68

R110

R210

A10266-6831

68K

R111

R211

A10266-1231

12K

R112

R212

A10266-5131

51K

R113

R213

A10266-4721

4.7K

R114

R214

A10266-4721

4.7K

R115

R215

A10266-5141

510K

R116

R216

A10266-2751

2.7M

R117

R217

A10266-4731

47K

R118

R218

C 7780-7

270 Flame Proof

R119

R219

A10266-3011

300

R120

R220

C 7780-7

270 Flame Proof

R121

R221

C 5062-2

100K Pot (-ODEP)

R122

R222

A10266-2741

270K

R123

R223

A10266-1832

18K .5W

R124

R224

A10266-6821

6.8K

R125

R225

C 7782-3

100 Flame Proof

R126

R226

C 7782-3

100 Flame Proof

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 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

6.8K

R137

R237

C 7782-3

100 Flame Proof

R138

R238

A10266-6821

6.8K

R139

R239

A10266-8211

820

R140

R240

A10266-6801

68

R141

R241

A10266-1541

150K

R142

R242

A10266-1541

150K

R143

R243

A10266-1041

100K

R144

R244

A10266-1041

100K

R145

R245

A10266-1851

1.8M

R146

R246

A10266-1031

10K

R147

R247

C 7781-5

200 .5W Flame Proof

R148

R248

A10266-2721

2.7K

R149

R249

C 7781-5

200 .5W Flame Proof

R150

R250

A10266-2721

2.7K

R151

R251

A10266-1031

10K

R152

R252

A10265-11821 11.8K 1%

R153

R253

JUMPER

Jumper Wire

R154

R254

C 8261-7

121K 0.1%

R155

R255

A10266-1321

1.3K

R156

R256

A10266-1321

1.3K

R157

R257

A10266-1321

1.3K

R158

R258

A10265-11321 11.3K 1%

R159

R259

A10266-1021

1K

R160

R260

C 8260-9

10K 0.1%

R161

R261

A10266-4701

47

R162

R262

A10266-4701

47

R163

R263

C 8261-7

121K 0.1%

R164

R264

C 8260-9

10K 0.1%

R165

R265

C 8261-7

121K 0.1%

R166

R266

A10266-1851

1.8M

R167

R267

A10265-10011 1K 1%

R168

R268

A10265-95301 953 1%

R170

R270

A10265-10011 1K 1%

R171

R271

A10265-95301 953 1%

R173

R273

C 8260-9

10K 0.1%

R174

R274

A10265-24921 24.9K 1%

R175

R275

A10265-11521 11.5K 1%

R176

R276

A10265-24921 24.9K 1%

R177

R277

A10265-40221 40.2K 1%

R179

R279

A10266-1321

1.3K

R180

R280

A10266-4711

470

R181

R281

A10266-4721

4.7K

R182

R282

A10266-2201

22

R183

R283

A10266-2421

2.4K

R184

R284

A10266-4741

470K

R185

R285

A10266-2421

2.4K

R186

R286

A10266-2751

2.7M

R187

R287

A10266-3631

36K

R188

R288

A10266-3631

36K

Summary of Contents for Macro-Tech 1200

Page 1: ...ER AMPLIFIER SERVICE MANUAL K SVCMA12 2 96 Macro 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...

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: ...2 Q42855 9 Display Module Parts List 23 Q43433 4 Display Module Parts List 24 Q42647 0 Output Module Parts List 25 Q42717 1 Output Module Parts List 26 Q42871 6 Output Module Parts List 27 Q42968 0 Ou...

Page 4: ...Lists 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 c...

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: ...e Emulation Protec tion ODEP limits drive in the event of dangerous dynamicthermalconditionswithoutinterruptingpower Current limiting for shorted load protection DC LF and common mode output current F...

Page 7: ...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 select...

Page 8: ...otary type Front panel indicators let the user know the status of the low voltage power supply enable an ODEP indicator for each channel which shows the reserve energy status and a SPI IOC indicator f...

Page 9: ...control protection transistors The 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 d...

Page 10: ...PNP One difference is that the PNP bias resistor is slightly Theory Vcc Positive Rail Vcc Negative Rail Load speaker Input signal HIGH SIDE LOW SIDE Inverting Op amp Figure 2 Crown Patented Grounded...

Page 11: ...ver a peak to peak voltage 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 t...

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: ...ormally be performed within 2 minutes of turn on from ambient cold conditions If possible measure heatsink temperature if not mea sure ambient room temperature Use this information when referencing th...

Page 14: ...s per standard Procedure Load each channel to 8 ohms Inject a 10 kHz square wave to obtain 65 volts zero to peak at each output Observe the slope of the square wave It should typically measure 13 to 1...

Page 15: ...Hz 6VAC sine wave into each channel and verify that each channel cycles into mute Test 16 Signal to Noise Ratio Spec 100 dB below rated 8 ohm power 20 Hz to 20 kHz 105 dB A Weighted Initial Conditions...

Page 16: ...fier should not activate any protective circuits ODEP Fault or LF Protection Post Testing After completion of testing if all tests are satisfactory the amplifier controls should be returned to the pos...

Page 17: ...sher 4 H42873 2 Transmotor 120V 60Hz Only 1 H43068 8 Transmotor 100V Units Only 1 H43407 8 Transmotor 120V 50Hz Only 1 H43061 3 Transmotor 200 240V Units Only 1 D 8439 8 Fan Bracket 1 C 9939 7 Fan Bla...

Page 18: ...ith fins 2 Back Panel Assembly CPN ITEM QTY M45491 4 MA 600 1200 Back Panel Assembly 1 A11793 0301A Power Cord US Version 1 A10793 0503B Power Cord European Version 1 A10214 7 Strain Relief 1 C 2823 0...

Page 19: ...Connector 1 D 7623 8 10 22AWG Cable with Terminals 1 H42918 5 Display Ribbon Cable 3 Cond 8 1 C 6965 5 Screw 6 32 X 1562 PH Binder HD 4 A10086 10604 Screw 6 32 X 25 RDHD 3 A10086 70806 Screw 8 32 X 3...

Page 20: ...D 7911 7 board No longer available use Q43030 8 as service replacement Q43036 5 Main module on D 7993 5 board No longer available use Q43030 8 as service replacement Q43030 8 Main module on D 7993 5 b...

Page 21: ...ard 1 Q42862 5 Channel 2 Fuse Module CPN Item Qty A10124 24 24 Solid Buss Wire 7 A10266 1001 10 Ohm 25W 5 Res 1 C 2851 1 1N4004 Diode 1 C 5060 6 PC Mount Fuse Clip 2 C 7526 4 3 Pos 1 Center Header 1 C...

Page 22: ...Q605 D 2961 7 Sel 2N3859 Q506 Q606 C 3954 2 MPSA56 Resistors R501 R601 C 3198 6 1M R502 R602 C 4346 0 33K R503 R603 C 2885 9 270K R504 R604 C 2631 7 10K R505 R605 C 1053 5 1K 5W R506 R606 C 1036 0 2 2...

Page 23: ...E602 C 4342 9 Amber E701 C 4342 9 Amber Transistors Q501 Q601 C 3625 8 2N4125 Q502 Q602 D 2961 7 Sel 2N3859 Q503 Q603 D 2961 7 Sel 2N3859 Q504 Q604 C 3625 8 2N4125 Q506 Q606 C 3954 2 MPSA56 Resistors...

Page 24: ...1N4148 D701 C 8235 1 1N6263 LED s E501 E601 C 7863 1 Green E502 E602 C 4342 9 Amber E701 C 4342 9 Amber Transistors Q501 Q601 C 3625 8 2N4125 Q502 Q602 D 2961 7 Sel 2N3859 Q503 Q603 D 2961 7 Sel 2N385...

Page 25: ...6 FP R03 C 6486 2 2 5W R04 C 6486 2 2 5W R06 C 6486 2 2 5W R07 C 6486 2 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...

Page 26: ...6486 2 2 5W R09 C 7779 9 22 FP R10 A10266 4711 470 R11 A10266 2R73 2 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 64...

Page 27: ...R09 C 7779 9 22 FP R10 A10266 4711 470 R11 A10266 2R73 2 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 R1...

Page 28: ...8 C 6486 2 2 5W R09 C 7779 9 22 FP R10 A10266 4711 470 R11 A10266 2R73 2 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...

Page 29: ...C 6486 2 2 5W R09 C 7779 9 22 FP R10 A10266 4711 470 R11 A10266 2R74 2 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 6...

Page 30: ...D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 Q42666 0 Main Module D 6721A9 board Parts List 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: ...800 7 200 R150 R250 C 5168 7 2 7K R151 R251 C 2631 7 10K R152 R252 C 2878 4 12K R154 R254 C 2872 7 100 R156 R256 C 3144 0 1 3K R157 R257 C 3144 0 1 3K R158 R258 C 5878 1 9 1K R159 R259 C 2631 7 10K R1...

Page 32: ...N4004 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 D8 C 3181 2 1N4148 D9 C 3549 0 1N961B D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206...

Page 33: ...2 C 5062 2 100K R133 R233 C 2885 9 270K R134 R234 C 1075 8 18K R135 R235 C 2872 7 100 R136 R236 C 5166 1 6 8K R137 R237 C 2872 7 100 R138 R238 C 5166 1 6 8K R139 R239 C 2627 5 1K R140 R240 C 3960 9 82...

Page 34: ...5 6 Inch Ribbon Cable C 1889 2 6 32 Hex Nut C 2176 3 6 32 x 5 Screw C 3450 1 14 Pin Socket C 4508 5 16 Pin Socket C 5341 0 TO220 Heatsink C 5594 4 6 Internal Star Washer J100 J200 C 6777 4 1 4 Phone...

Page 35: ...N4004 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 D8 C 3181 2 1N4148 D9 C 3549 0 1N961B D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206...

Page 36: ...2 C 5062 2 100K R133 R233 C 2885 9 270K R134 R234 C 1075 8 18K R135 R235 C 2872 7 100 R136 R236 C 5166 1 6 8K R137 R237 C 2872 7 100 R138 R238 C 5166 1 6 8K R139 R239 C 2627 5 1K R140 R240 C 3960 9 82...

Page 37: ...J800 D 6619 7 10 Inch Ribbon Cable J600 J700 D 6620 5 6 Inch Ribbon Cable C 1889 2 6 32 Hex Nut C 2176 3 6 32 x 5 Screw C 3450 1 14 Pin Socket C 4508 5 16 Pin Socket C 5341 0 TO220 Heatsink C 5594 4...

Page 38: ...C250 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 2...

Page 39: ...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...

Page 40: ...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 41: ...0 C 6806 1 01 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 2...

Page 42: ...K 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 8K R137 R237 C 7782 3 10...

Page 43: ...51 1M R915 R1015 A10266 1001 10 R916 R1016 A10266 1001 10 Switches S2 C 7325 1 Ground Lift S3 C 7960 5 Sensitivity S4 C 6781 6 Stereo Mono IC s U1 C 5095 2 UA7815 U2 C 5096 0 UA7915 U100 U200 C 6911 9...

Page 44: ...250 C 6806 1 01 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...

Page 45: ...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 8K R137 R...

Page 46: ...266 1001 10 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 Ground Lift S3 C 7...

Page 47: ...0 C 6806 1 01 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 2...

Page 48: ...00K 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 8K R137 R237 C 7782 3...

Page 49: ...917 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 Ground Lift S3 C 7960 5 Sensiti...

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