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Macro-Tech 1200 Amplifier Service Manual
POWER AMPLIFIER
SERVICE MANUAL
MACRO-TECH
®
-1200
©1996 by CROWN INTERNATIONAL, INC.
Mailing Address:
Shipping Address:
P.O. Box 1000
57620 C.R. 105
Elkhart, IN U.S.A. 46515-1000
Elkhart, IN U.S.A. 46517
Macro-Tech
®
, ODEP
®
and Crown
®
are registered trademarks of Crown International, Inc.
K-SVCMA12
2-96
1
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Table of Contents
Related Manuals for Crown Macro-Tech MA-1200
Summary of Contents for Crown Macro-Tech MA-1200
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Page 1: Power Amplifier
©1996 by CROWN INTERNATIONAL, INC. Mailing Address: Shipping Address: P.O. Box 1000 57620 C.R. 105 Elkhart, IN U.S.A. 46515-1000 Elkhart, IN U.S.A. 46517 Macro-Tech ® , ODEP ® and Crown ® are registered trademarks of Crown International, Inc. K-SVCMA12 2-96... - Page 2 The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. If you need special assistance beyond the scope of this manual, please contact the Crown Technical Support Group.
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Page 3: Table Of Contents
Macro-Tech 1200 Amplifier Service Manual Table of Contents Introduction ... 4 Parts Information ... 5 Specifications ... 6 Voltage Conversion ... 7 Circuit Theory ... 8 Electrical Checkout Procedures ... 13 Parts List (Non-Module) ... 17 Module and Schematic Information ... 20 Fuse Module Parts List ... -
Page 4: Specifications
Because most Crown products carry a 3 Year Full Warranty (including round trip shipping within the United States), all warranty service should be referred to the Crown Factory or Authorized Warranty Service Center. -
Page 5: General Information
Part Numbering Systems As of the printing of this manual, Crown is using two numbering systems. The elder system always uses eight characters. The first character is a letter. Com- mon letters used are C, D, H, M, P, and Q. -
Page 6: Specifications
8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally 3 years). Because our testing methods are more strin- gent than our published specifications, every Crown amplifier will exceed its published specifications. -
Page 7: Voltage Conversion
The 120 Volt 60 Hz version, sold in the United States, is not voltage selectable. It does not have voltage selection boards. This version is to be used only with 120 Volts, 60Hz. Jumpers Fuses F100/F200 Transmotor Macro-Tech 1200 Amplifier Service Manual Voltage Conversion All other versions of the Macro Tech 1200 use voltage selection boards. -
Page 8: Circuit Theory
Macro-Tech 1200 Amplifier Service Manual Overview It should be noted that over time Crown makes im- provements and changes to their products for various reasons. This manual is up to date as of the time of writing. For additional information regarding these amplifiers, refer to the applicable Technical Notes provided by Crown for this product. -
Page 9: Voltage Amplification
This negative feedback fixes gain at the offset reference points (and the output of the Error Amp) at a factor of -25.2 with respect to the amplifier output. The Voltage Translators are arranged in a common base configuration for non-inverting voltage gain with equal gain. - Page 10 The negative half of the HS is almost identical to the positive half, except that the devices are PNP. One difference is that the PNP bias resistor is slightly Figure 2. Crown Patented Grounded Bridge Topology Theory greater in value so that PNP output devices run closer to the cutoff level under static (no signal) conditions.
- Page 11 AB+B in the same manner as the HS. When the amplifier output swings positive, the audio is fed to an op-amp stage where it is inverted. This inverted signal is delivered directly to the bases of the positive (NPN) and negative (PNP) LS predrivers. The negative drive forces the LS PNP devices on (NPN off).
- Page 12 BALANCED INPUTS Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown) Macro-Tech 1200 Amplifier Service Manual Theory +VOLTAGE TRANSLATOR ERROR OUTPUT DEVICE EMULATION PROTECTION -VOLTAGE TRANSLATOR INVERTING BRIDGE BALANCE POSITIVE +LVA HIGH SIDE OUTPUT NPN STAGE HIGH SIDE...
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Page 13: Electrical Checkout Procedures
Macro-Tech 1200 Amplifier Service Manual Electrical Checkout Procedures General Information The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the proce- dure. - Page 14 1K Ohm Figure 4. Differentiator Circuit Macro-Tech 1200 Amplifier Service Manual Test 10: Slew Rate & 10 kHz Square Wave Spec: 13 - 15 V/µS. Initial Conditions: Controls 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.
- Page 15 Macro-Tech 1200 Amplifier Service Manual Electrical Checkout Procedures Procedure Short: Inject a 60 Hz sine wave at 20 VAC output. After establishing signal, short the output for 10 seconds. Test 14: ODEP Limiting Spec: No oscillation on ODEP Limiting wave form; either channel controls limiting in Parallel Mono Mode.
- Page 16 Macro-Tech 1200 Amplifier Service Manual Electrical Checkout Procedures Test 20: Clipping Spec: No protective action during test. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave at each input and drive output 6 dB into clip for 10 seconds.
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Page 17: Parts List (Non-Module)
Fuse Module, Ch 2 (50-60 Hz Units) A10285-28 20 Amp Fuse (100-120V Units) A10285-26 10 Amp Fuse (200-240V Units) A10285-7 .5 Amp Fuse (120V 60Hz Units Only) D 8992-6 Power Transformer (120V 60Hz Units Only) D 7674-1 Power Transformer (50-60Hz Universal Voltage) D 6301A0... -
Page 18: Back Panel Assembly
Macro-Tech 1200 Amplifier Service Manual Output Assembly (cont.) ITEM D 8197-2 Paper Shroud C 9387-9 Plasti-Rivit D 8774-8 PTC, 95 Deg. Thermal Sensor F12019-0 Aluminum Heatsink Slug (under diodes on output mod) 1 C 8813-5 MPS8097/MPSA18 NPN Transistor (Q318/Q418) B 5842-8 #23 Tubing for Q318/Q418 transistor leads C 5826-0 LM-234Z-6 Thermal Sense (S100/S200) -
Page 19: Main Chassis Assembly
Screw, 8-32 X .750 Taptite A10192-1 Snap Bushing, OCB .500 C 1811-6 4" Cable Tie C 1813-2 7.5" Cable Tie & Clamp C 3163-0 505 Sldr. Lug, #6 Hole C 6912-7 Tention Retaining Board Support C 6913-5 1" Spacer Toggle Nut, Plastic C 6914-3 .75"... -
Page 20: Module And Schematic Information
Macro-Tech 1200 Amplifier Service Manual Module and Schematic Information Module History Since the introduction of the MA-1200 amplifier there have been several updates and revisions. Some of these changes called for new modules. The following is a list of all modules used up to this date, February 1996. -
Page 21: Fuse Module Parts List
M43535-0 Fuse Module (30A Relay) Item C 5060-6 PC Mount Fuse Clip A10266-1001 10 Ohm .25W 5% Res. 2 C 3181-2 1N4148 Diode C 7649-4 .01µF 1KV Disc Cap. C 9592-4 .01µF 250VAC Film Cap 2 C 9787-0 30A 24V Relay P10386-4 MA-600 Relay Board M44213-3 Fuse Module (Omron 10A Relay) -
Page 22: Q42553A8 Display Module Parts List
Q42553A8 Display Module (D 6260C4 board) Parts List Capacitors C501 C601 C 6802-0 C502 C602 C 6806-1 C503 C603 C 6806-1 C504 C604 C 6804-6 C505 C605 C 5050-7 C507 C607 C 6809-5 C508 C608 C 6807-9 C701 C 6802-0 C702 C 6802-0 Diodes... -
Page 23: Q42855-9 Display Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42855-9 Display Module (D 6260C4 board) Parts List Capacitors C501 C601 C 6802-0 C502 C602 C 6806-1 C503 C603 C 6806-1 C507 C607 C 6809-5 C701 C 6802-0 C702 C 6802-0 Diodes D501 D601 C 3181-2 D502 D602 C 3181-2... -
Page 24: Q43433-4 Display Module Parts List
Q43433-4 Display Module (D 8897-7 board) Parts List Capacitors C501 C601 C 6802-0 C502 C602 C 6806-1 C503 C603 C 6806-1 C507 C607 C 6809-5 C701 C 6804-6 C702 C 6804-6 C703 C 6804-6 C704 C 6804-6 Diodes D501 D601 C 3181-2 D502 D602... -
Page 25: Q42647-0 Output Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42647-0 Output Module (P10137-1 board) Parts List Capacitors C 3978-1 .047µF C 6804-6 .1µF C 6804-6 .1µF C 3996-3 .0047µF C 6807-9 .001µF C 6806-1 .01µF C 6807-9 .001µF C 6809-5 220pF C 6810-3 180pF Diodes C 2851-1 1N4004... -
Page 26: Q42717-1 Output Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42717-1 Output Module (P10233-8 board) Parts List Capacitors C 3978-1 .047µF C 3218-2 .22µF C 3218-2 .22µF C 8534-7 .0047µF C 6807-9 .001µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF Diodes C 2851-1 1N4004... -
Page 27: Q42871-6 Output Module Parts List
Q42871-6 Output Module (P10305-4 board) Parts List Capacitors C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 8534-7 .0047µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF C 6806-1 .01µF Diodes C 2851-1 1N4004 C 2851-1 1N4004... -
Page 28: Q42968-0 Output Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42968-0 Output Module (P10341-9 board) Parts List Capacitors C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 6807-9 .001µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF C 6806-1 .01µF Capacitors... -
Page 29: Q43202-3 Output Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q43202-3 Output Module (P10397-1 board) Parts List Capacitors C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 8534-7 .0047µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF C 6806-1 .01µF Diodes... -
Page 30: Q42666-0 Main Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42666-0 Main Module (D 6721A9 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 4303-1 1000µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4 10pF C103 C203... - Page 31 Macro-Tech 1200 Amplifier Service Manual Q42666-0 Main Module (D 6721A9 board) Parts List Cont. R102 R202 C 2627-5 R103 R203 C 5707-2 100K R104 R204 C 5168-7 2.7K R105 R205 C 5168-7 2.7K R106 R206 C 2878-4 R107 R207 C 2880-0 R108 R208 C 2627-5...
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Page 32: Q42736-1 Main Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42736-1 Main Module (D 6978-7 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 4303-1 1000µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 6094-4 33µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4... - Page 33 Macro-Tech 1200 Amplifier Service Manual Q42736-1 Main Module (D 6978-7 board) Parts List Cont. Resistors C 7365-7 53.6K C 7340-0 C 7340-0 C 7364-0 46.4K C 3220-8 5.6K C 4167-0 C 2627-5 C 2877-6 8.2K C 3872-6 R100 R200 C 6893-9 5K Input Pot.
- Page 34 Macro-Tech 1200 Amplifier Service Manual Q42736-1 Main Module (D 6978-7 board) Parts List Cont. Misc. C 6871-5 6 Cond. Connector C 6850-9 4 Pos. Header J500 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...
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Page 35: Q42754-4 Main Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42754-4 Main Module (D 7150-2 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 4303-1 1000µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 6094-4 33µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4... - Page 36 Macro-Tech 1200 Amplifier Service Manual Q42754-4 Main Module (D 7150-2 board) Parts List Cont. Resistors C 7365-7 53.6K C 7340-0 C 7340-0 C 7364-0 46.4K C 3220-8 5.6K C 4167-0 C 2627-5 C 2877-6 8.2K C 3872-6 R100 R200 C 6893-9 5K Input Pot.
- Page 37 Macro-Tech 1200 Amplifier Service Manual Q42754-4 Main Module (D 7150-2 board) Parts List Cont. Misc. C 6871-5 6 Cond. Connector C 6850-9 4 Pos. Header J500 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...
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Page 38: Q42776-7 Main Module Parts List
Macro-Tech 1200 Amplifier Service Manual Q42776-7 Main Module (D 7251-8 board) Parts List Capacitors C 3913-8 470µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 6094-9 33µF C 6806-1 .01µF C100 C200 C 5311-3 22µF C101 C201 C 2820-6... - Page 39 Macro-Tech 1200 Amplifier Service Manual Q42776-7 Main Module (D 7251-1 board) Parts List Cont. Q116 Q216 C 3786-8 PN4250A Q117 Q217 D 2961-7 2N3859A Q118 Q218 D 2961-7 2N3859A Q119 Q219 C 3625-8 2N4125 Q120 Q220 C 3625-8 2N4125 Q121 Q221 C 7458-0 2N4123...
- Page 40 Macro-Tech 1200 Amplifier Service Manual Q42776-7 Main Module (D 7251-1 board) Parts List Cont. Integrated Circuits C 5095-2 MC7815 C 5096-0 MC7915 U100 U200 C 6911-9 UPA75 PNP U103 U203 C 6910-1 UPA76 NPN U104 U204 C 6900-2 MC34084P Connectors C 7593-4 HDR, 5 PIN C 4508-5...
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Page 41: Q42981-3 Main Module Parts List
Q42981-3 Main Module (D7911-7 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 8897-8 .1µF C100 C200 C 5311-3 22µF C101 C201 C 2821-4 10pF C103 C203 C 6805-3 .022µF C104 C204... - Page 42 Q42981-3 Main Module (D7911-7 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) N100 N200 D 4669-4 Network Package N101 N201 D 7946-3 Network Package N102...
- Page 43 Macro-Tech 1200 Amplifier Service Manual Q42981-3 Main Module (D7911-7 board) Parts List Cont. R190 R290 A10266-2051 R191 R291 A10266-3331 R192 R292 A10266-1031 R193 R293 A10266-1031 R194 R294 A10266-1041 100K R195 R295 A10266-3021 R196 R296 A10266-4721 4.7K R197 R297 A10266-1031 R198 R298 A10266-4721 4.7K...
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Page 44: Q43036-5 Main Module Parts List
Q43036-5 Main Module (D7993-5 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 8897-8 .1µF C100 C200 C 5311-3 22µF C101 C201 C 2821-4 10pF C103 C203 C 6805-3 .022µF C104 C204... - Page 45 Macro-Tech 1200 Amplifier Service Manual 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...
- Page 46 Macro-Tech 1200 Amplifier Service Manual Q43036-5 Main Module (D7993-5 board) Parts List Cont. R189 R289 A10266-2731 R190 R290 A10266-2051 R191 R291 A10266-3331 R192 R292 A10266-1031 R193 R293 A10266-1031 R194 R294 A10266-1041 100K R195 R295 A10266-3021 R196 R296 A10266-4721 4.7K R197 R297 A10266-1031 R198...
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Page 47: Q43030-8 Main Module Parts List
Q43030-8 Main Module (D7993-5 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF C 8897-8 .1µF C100 C200 C 5311-3 22µF C101 C201 C 2821-4 10pF C103 C203 C 6805-3 .022µF C104 C204... - Page 48 Macro-Tech 1200 Amplifier Service Manual Q43030-8 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...
- Page 49 Macro-Tech 1200 Amplifier Service Manual Q43030-8 Main Module (D7993-5 board) Parts List Cont. R190 R290 A10266-2051 R191 R291 A10266-3331 R192 R292 A10266-1031 R193 R293 A10266-1031 R194 R294 A10266-1041 100K R195 R295 A10266-3021 R196 R296 A10266-4721 4.7K R197 R297 A10266-1031 R198 R298 A10266-4721 4.7K...
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