Crown Macro-Tech MA-2400 Service Manual
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Crown Macro-Tech MA-2400 Service Manual

Crown macro-tech ma-2400: supplementary guide
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Macro-Tech 2400 Amplifier Service Manual

POWER AMPLIFIER

SERVICE MANUAL
MACRO-TECH
®
-2400
©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-SVCMA24
3-96
1

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Summary of Contents for Crown Macro-Tech MA-2400

  • 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-SVCMA24 3-96...
  • 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.

  • Page 3: Table Of Contents

    Macro-Tech 2400 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: Introduction

    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: Parts 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

    50 or 60 Hz. VOLTAGE SELECTION BOARD 120V 200V 100V ORG—B ORG—A ORG—B B—E A—D C—E BLU—F BLU—F BLU—F C—F C—F C10169-8 15 Amp A10285-10 1 Amp H42999-5 H42929-2 240V 220V/230V ORG—B ORG—A C—D C—D BLU—F BLU—F C10171-4 8 Amp A10285-7 .5 Amp...

  • Page 8: Circuit Theory

    Macro-Tech 2400 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 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 PNP bias resistor is slightly greater in value so that PNP output devices run closer to the cutoff level under static (no signal) conditions. Figure 2. Crown Patented Grounded Bridge Topology Theory This is because PNP devices require greater drive current.
  • 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 2400 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...

  • Page 13: Electrical Checkout Procedures

    Macro-Tech 2400 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 4. Increase output level until current limit oc- curs. Current limit should occur at 36 ±5 Amps (36 Vpk). Observe clean (no oscillations) current clipping. Test 10: Slew Rate & 10 kHz Square Wave Spec: 17 - 25 V/µS. Initial Conditions: Controls per standard.
  • Page 15 Macro-Tech 2400 Amplifier Service Manual Electrical Checkout Procedures Test 12: Output Power Spec at 8 Ohm Stereo: >= 520W at 0.1% THD. Spec at 4 Ohm Stereo: >= 800W at 0.1% THD. Spec at 2 Ohm Stereo: >= 1050W at 0.1% THD. International 8 Ohm Stereo: >=510W at 0.1% THD.
  • Page 16 Macro-Tech 2400 Amplifier Service Manual Electrical Checkout Procedures Test 18: Turn Off Transients Spec: No dangerous transients. Initial Conditions: Controls per standard. Procedure: From an on condition, turn off the amplifier and monitor the output noise at the time of turn off. Note: Turn off noise may increase significantly if the amplifier is cycled off and on.

  • Page 17: Parts List (Non-Module)

    Supplimental Items ITEM D 4137-2 Nylon Thumbscrew Washer C 3342-0 Feet, Black Self-Stick A10087-71012 10-32 .75 Machine (Rack Screw) K80449D2 MA Series Owners Manual Power Supply ITEM D 6974-6 Insulator, Fuse Board A10089-11032 Screw, 10-32 x 2 (for transformers) A10094-8 Washer, #10 Int Star, Zinc (transformers) A10099-7 Shoulder Washer, #10 Nylon (transformers)
  • Page 18 Macro-Tech 2400 Amplifier Service Manual Output Assembly (cont.) ITEM M21322J8 Heat Sink with Fins C 8573-5 2SA1186 PNP Driver Transistor C 8574-3 2SC2837 NPN Driver Transistor D 7665-9 T03P Mounting Clip D 7666-7 T03P Bracket Back Panel Assembly ITEM D 7975-2 Power Cord, 12/3 SO/W-A 20A U.S.
  • Page 19 A10110-70812 Screw, 8-32 x .750 Taptite A10192-1 Snap bushing, .500 C 1811-6 4" Cable Tie C 1813-2 7.5" Cable Tie & Clamp C 3163-0 Solder Lug, #6 Hole C 6709-7 Ferrite Bead C 6912-7 Tension Retaining Board Supports C 6913-5 1"...

  • Page 20: Module And Schematic Information

    Macro-Tech 2400 Amplifier Service Manual Module and Schematic Information Module History Since the introduction of the MA-2400 amplifier there have been several updates and revisions. Some of these changes called for new modules. The following is a list of modules used up to this date, March 1996. Output Modules: (left and right are identical) Q42670-2 Original output module on P10233-8.

  • Page 21: Fuse Module Parts List

    Q42742-9 Fuse Module C1, C2 C 5234-7 .047µF 125V D1, D2 C 3181-2 1N4148 Diode 0 Ohm C 5868-2 .25W Jumper R1, R2 A10266-1001 10 Ohm .25W K1, K2 C 7823-5 24V, 30A Relay C 7890-4 Relay Cap C 5060-6 Fuse Mount Clips Cable H42918-5...

  • Page 22: Q42742-9 Display Module Parts List

    Q42742-9 Display Module (D 6260C4 board) Parts List Capacitors C501 C601 C 6802-0 .47µF Ax 50V C502 C602 C 6806-1 .01µF Ax 100V C503 C603 C 6806-1 .01µF Ax 100V C504 C604 C 7353-3 .22µF Ax 50V C505 C605 C 5050-7 4.7µF Ax 100V Lytic C507 C607...

  • Page 23: Q42875-7 Display Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42875-7 Display Module (D 6260C4 board) Parts List Capacitors C501 C601 C 6802-0 .47µF Ax C502 C602 C 6806-1 .01µF Ax C503 C603 C 6806-1 .01µF Ax C507 C607 C 6809-5 220pF C701 C 6802-0 .47µF Ax C702 C 6802-0...

  • Page 24: Q43442-5 Display Module Parts List

    Q43442-5 Display Module (D 8897-7 board) Parts List Capacitors C501 C601 C 6802-0 .47µF Ax C502 C602 C 6806-1 .01µF Ax C503 C603 C 6806-1 .01µF Ax C507 C607 C 6809-5 220pF C701 C 6804-6 .1µF Ax C702 C 6804-6 .1µF Ax C703 C 6804-6...

  • Page 25: Q42670-2 Output Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42670-2 Output Module (P10233-8 board) Parts List Capacitors C 3978-1 .047µF C 2938-6 .1µF C 2938-6 .1µF C 6806-1 .01µF C 6806-1 .01µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF Diodes C 2851-1 1N4004...

  • Page 26: Q42887-2 Output Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42887-2 Output Module (P10315-3 board) Parts List Capacitors C 8511-5 .047µF C 8426-6 .1µF C 8426-6 .1µF C 6806-1 .01µF C 6806-1 .01µF C 6806-1 .01µF C 6807-9 .001µF C 6810-3 180pF C 6809-5 220pF C 7697-3 .01µF Diodes...

  • Page 27: Q42985-4 Output Module Parts List

    Q42985-4 Output Module (P10337-7 board) Parts List Capacitors C 8511-5 .047µF 250V Ax C 8426-6 .1µF C 8426-6 .1µF C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6810-3 180pF C 6809-5 220pF...

  • Page 28: Q43194-2 Output Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43194-2 Output Module (P10396-3 board) Parts List Capacitors C 8511-5 .047µF 250V Ax C 8426-6 .1µF C 8426-6 .1µF C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6810-3 180pF...

  • Page 29: Q43358-3 Output Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43358-3 Output Module (P10433-4 board) Parts List Capacitors A10434-437JD .047µF 250V C 8426-6 .1µF C 8426-6 .1µF C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6810-3 180pF C 6809-5...

  • Page 30: Q42667-8 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42667-8 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 6094-9 33µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4...
  • Page 31 Macro-Tech 2400 Amplifier Service Manual Q42667-8 Main Module (D 6978-7 board) Parts List Cont. A10266-5621 5.6K A10266-4331 A10266-1021 A10266-8221 8.2K A10266-6211 620 Ohm R100 R200 C 7592-6 Header R101 R201 A10265-49911 4.99K R102 R202 A10266-1021 R103 R203 A10266-1041 100K R104 R204 A10266-2721 2.7K...
  • Page 32 Macro-Tech 2400 Amplifier Service Manual Q42667-8 Main Module (D 6978-7 board) Parts List Cont. Misc. Mounts U1, U2: C 1889-2 6-32 Nut C 2176-3 6-32 X .5 Screw C 5341-0 Heatsink C 5594-4 Star Washer Mounts U104, U204: C 3450-1 14 Pin Socket Covers For J100, J200: C 6778-2...

  • Page 33: Q42737-9 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42737-9 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 6094-9 33µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4...
  • Page 34 Macro-Tech 2400 Amplifier Service Manual Q42737-9 Main Module (D 6978-7 board) Parts List Cont. Resistors A10265-53621 53.6K A10266-2402 24 OHM A10266-2402 24 OHM A10265-46421 46.4K A10266-5621 5.6K A10266-4331 A10266-1021 A10266-8221 8.2K A10266-6211 620 Ohm R100 R200 C 7592-6 Header R101 R201 A10265-49911 4.99K R102...
  • Page 35 Macro-Tech 2400 Amplifier Service Manual Q42737-9 Main Module (D 6978-7 board) Parts List Cont. Connectors C 6871-5 Header, 6 Pin C 6850-9 Header, 4 Pin C 7077-8 Retainer, 3 Pin J100 J200 C 6777-4 Phone Jack J500 J800 D 6619-7 10"...

  • Page 36: Q42753-6 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42753-6 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 6094-9 33µF C100 C200 C 5053-1 18µF C101 C201 C 2821-4...
  • Page 37 Macro-Tech 2400 Amplifier Service Manual Q42753-6 Main Module (D 7150-2 board) Parts List Cont. Resistors A10265-53621 53.6K A10266-2402 24 OHM A10266-2402 24 OHM A10265-46421 46.4K A10266-5621 5.6K A10266-4331 A10266-1021 A10266-8221 8.2K A10266-6211 620 Ohm R100 R200 C 7592-6 Header R101 R201 A10265-49911 4.99K R102...
  • Page 38 Macro-Tech 2400 Amplifier Service Manual Q42753-6 Main Module (D 7150-2 board) Parts List Cont. Connectors C 6871-5 Header, 6 Pin C 6850-9 Header, 4 Pin C 7077-8 Retainer, 3 Pin J100 J200 C 6777-4 Phone Jack J500 J800 D 6619-7 10"...

  • Page 39: Q42777-5 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q42777-5 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 40 Macro-Tech 2400 Amplifier Service Manual Q42777-5 Main Module (D 7251-8 board) Parts List Cont. Resistors A10265-53621 53.6K A10266-2402 24 Ohm A10266-2402 24 Ohm A10265-46421 46.4K A10266-5621 5.6K A10266-4331 A10266-1021 A10266-8221 8.2K A10266-6211 620 Ohm R100 R200 C 7592-6 Header R101 R201 A10265-49911 4.99K R102...
  • Page 41 Q42777-5 Main Module (D 7251-8 board) Parts List Cont. Connectors C 7593-4 Header, 5 Pin C 7527-2 Header, 6 Pin C 7592-6 Header, 4 Pin C 7526-4 Header, 3 Pin J100 J200 C 6777-4 Phone Jack J500 J800 D 6619-7 10"...

  • Page 42: Q42982-1 Main Module Parts List

    Q42982-1 Main Module (D 7911-7 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 6804-6 .1µF C100 C200 C 5311-3 22µF C101 C201 C 2821-4 10pF C103 C203 C 6805-3 .022µF C104 C204...
  • Page 43 Macro-Tech 2400 Amplifier Service Manual Q42982-1 Main Module (D 7911-7 board) Parts List Cont. Q117 Q217 D 2961-7 SEL 2N3859A Q118 Q218 D 2961-7 SEL 2N3859A Q119 Q219 C 3625-8 2N4125 Q120 Q220 C 3625-8 2N4125 Q121 Q221 C 7458-0 2N4123 Q122 Q222...
  • Page 44 Q42982-1 Main Module (D 7911-7 board) Parts List Cont. R187 R287 A10266-3631 R188 R288 A10266-3631 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...

  • Page 45: Q43037-3 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43037-3 Main Module (D 7993-5 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...
  • Page 46 Macro-Tech 2400 Amplifier Service Manual Q43037-3 Main Module (D 7993-5 board) Parts List Cont. Q120 Q220 C 3625-8 NPN 2N4125 Q121 Q221 C 7458-0 NPN 2N4123 Q122 Q222 C 7458-0 NPN 2N4123 Q123 Q223 C 7458-0 NPN 2N4123 Q124 Q224 C 3625-8 NPN 2N4125 Q125...
  • Page 47 Q43037-3 Main Module (D 7993-5 board) Parts List Cont. R185 R285 A10266-2421 2.4K R186 R286 A10266-2751 2.7M R187 R287 A10266-3631 R188 R288 A10266-3631 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...

  • Page 48: Q43132-2 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 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 9464-6 10pF C103 C203...
  • Page 49 Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 board) Parts List Cont. Q113 Q213 C 3625-8 NPN 2N4125 Q115 Q215 D 2962-5 NPN MPS8097 Q116 Q216 C 3786-8 PNP PN4250 Q117 Q217 D 2961-7 NPN 2N3859A Q118 Q218 D 2961-7 NPN 2N3859A Q119...
  • Page 50 Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 board) Parts List Cont. R181 R281 A10266-4721 4.7K R182 R282 A10266-2201 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 R188 R288 A10266-3631...

  • Page 51: Q43272-6 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 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 9464-6 10pF C103 C203...
  • Page 52 Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 board) Parts List Cont. Q110 Q210 C 3810-6 NPN MPSA43 Q112 Q212 C 3625-8 NPN 2N4125 Q113 Q213 C 3625-8 NPN 2N4125 Q115 Q215 D 2962-5 NPN MPS8097 Q116 Q216 C 3786-8 PNP PN4250 Q117...
  • Page 53 Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 board) Parts List Cont. R179 R279 A10266-1321 1.3K R180 R280 A10266-4711 R181 R281 A10266-4721 4.7K R182 R282 A10266-2201 R183 R283 A10266-2421 2.4K R184 R284 A10266-4741 470K R185 R285 A10266-2421 2.4K R186 R286 A10266-2751...

  • Page 54: Q43257-7 Main Module Parts List

    Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 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 9464-6 10pF C103 C203...
  • Page 55 Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 board) Parts List Cont. Q113 Q213 C 3625-8 NPN 2N4125 Q115 Q215 D 2962-5 NPN MPS8097 Q116 Q216 C 3786-8 PNP PN4250 Q117 Q217 D 2961-7 NPN 2N3859A Q118 Q218 D 2961-7 NPN 2N3859A Q119...
  • Page 56 Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 board) Parts List Cont. R181 R281 A10266-4721 4.7K R182 R282 A10266-2201 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 R188 R288 A10266-3631...

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