Macro-Tech 2400 Amplifier Service Manual POWER AMPLIFIER SERVICE MANUAL MACRO-TECH -2400 ® ©1996 by CROWN INTERNATIONAL, INC. Mailing Address: P.O. Box 1000 Elkhart, IN U.S.A. 46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN U.S.A. 46517 Macro-Tech®, ODEP® and Crown® are registered trademarks of Crown International, Inc.
Macro-Tech 2400 Amplifier Service Manual 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. Mail: P.O. Box 1000 Elkhart IN 46515-1000 Shipping: 57620 C.R.
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 ............................
Macro-Tech 2400 Amplifier Service Manual Introduction This manual contains service information on Crown power amplifiers. It is designed to be used in conjunction with the applicable Owner's Manual. However, some important information is duplicated in this Service Manual in case the Owner's Manual is not readily available.
Macro-Tech 2400 Amplifier Service Manual Parts Information General Information Later sections include both mechanical and electrical parts lists for this product. The parts listed are current as of the date printed. Crown reserves the right to modify and improve its products for the benefit of its customers. 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.
Macro-Tech 2400 Amplifier Service Manual Specifications Unless noted otherwise, all specifications are based on driving an 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 stringent than our published specifications, every Crown amplifier will exceed its published specifications.
Macro-Tech 2400 Amplifier Service Manual 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. All other versions of the Macro Tech 2400 use voltage selection 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.
Macro-Tech 2400 Amplifier Service Manual Theory Overview It should be noted that over time Crown makes improvements 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. This section of the manual explains the general operation of a typical Crown power amplifier. Topics covered include Front End, Grounded Bridge, and ODEP.
Macro-Tech 2400 Amplifier Service Manual Theory limiting transistors and control/protection transistors. The ODEP transistors steal drive as dictated by the ODEP circuitry (discussed later). The control/protection transistors act as switches to totally shunt audio to ground during the turn-on delay, or during a DC/LF or Fault protective action. overdriving the Error Amp.
Macro-Tech 2400 Amplifier Service Manual Theory High Side (HS) The High Side (HS) of the bridge operates much like a conventional bipolar push-pull output configuration. As the input drive voltage becomes more positive, the HS NPN conducts and delivers positive voltage to the load. Eventually the NPN devices reach full conduction and +Vcc is across the load. At this time the HS PNP is biased off.
Macro-Tech 2400 Amplifier Service Manual Theory deliver +Vcc and -Vcc from the same bridge rectifier and filter as a total difference in potential, regardless of their voltages with respect to ground. The LS uses inverted feedback from the HS output to control the ground reference for the rails (±Vcc). Both LS quadrants are arranged in a three-deep Darlington and are biased AB+B in the same manner as the HS.
Macro-Tech 2400 Amplifier Service Manual Theory BGS BALANCED INPUTS VGS -1 POSITIVE HIGH SIDE OUTPUT NPN STAGE +LVA -1 +VOLTAGE TRANSLATOR ERROR AMP OUTPUT DEVICE EMULATION PROTECTION HIGH SIDE BIAS SERVO NEGATIVE HIGH SIDE OUTPUT PNP STAGE -LVA -1 -VOLTAGE TRANSLATOR MAIN NEGATIVE FEEDBACK (NFb) LOOP POSITIVE LOW SIDE OUTPUT NPN STAGE -1 INVERTING BRIDGE BALANCE LOW SIDE BIAS DIODE STRING NEGATIVE LOW SIDE OUTPUT PNP STAGE Figure 3.
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 procedure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order. All tests assume that AC power is from a regulated 120 VAC source.
Macro-Tech 2400 Amplifier Service Manual Electrical Checkout Procedures Test 4: AC Power Draw Test 8: Level Controls Spec: 100 Watts maximum quiescent. Initial Conditions: Controls per standard. Procedure: With no input signal and no load, measure AC line wattage draw. If current draw is excessive, check for high AC line voltage or high bias voltage. Spec: Level controlled by level controls. Initial Conditions: Controls per standard. Procedure: No Load. Inject a 1 kHz sine wave.
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. International 4 Ohm Stereo: >=745W at 0.1% THD. International 2 Ohm Stereo: >=895W at 0.1% THD. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 1 kHz sine wave and measure at least 64.
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. Test 19: Intermodulation Distortion Spec at 0 dB Output: 0.01%. Spec at –35 dB Output: 0.05%. Initial Conditions: Controls per standard.
Macro-Tech 2400 Amplifier Service Manual Parts List (Non-Module) Supplimental Items CPN D 4137-2 C 3342-0 A10087-71012 K80449D2 ITEM Nylon Thumbscrew Washer Feet, Black Self-Stick 10-32 .75 Machine (Rack Screw) MA Series Owners Manual QTY 4 4 4 1 ITEM Insulator, Fuse Board Screw, 10-32 x 2 (for transformers) Washer, #10 Int Star, Zinc (transformers) Shoulder Washer, #10 Nylon (transformers) Washer, 7/16OD x .
Macro-Tech 2400 Amplifier Service Manual Parts List (Non-Module) Output Assembly (cont.) CPN M21322J8 C 8573-5 C 8574-3 D 7665-9 D 7666-7 ITEM Heat Sink with Fins 2SA1186 PNP Driver Transistor 2SC2837 NPN Driver Transistor T03P Mounting Clip T03P Bracket QTY (ONE PER CHANNEL) 2 2 2 2 2 ITEM Power Cord, 12/3 SO/W-A 20A U.S. Models) Power Cord (European Models) PIP-FX Screw, 4-40 x .62 Screw, 10-32 x .5 Lockwasher, #4 Internal Star Lockwasher, #10 Internal Star Aluminium Spacer, .250OD x .140ID x .
Macro-Tech 2400 Amplifier Service Manual Parts List (Non-Module) Chassis Front Assembly (Cont.) CPN A10086-10604 C 6005-0 D 4108-3 D 6265-9 D 7937-2 D 8694J7 F11322-9 ITEM Screw, 6-32 x .25 Set Screw, 6-32 x .18 cup point (for knobs) Collar, .
Macro-Tech 2400 Amplifier Service Manual Module and Schematic Information Module History Fuse Module: 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. Q42742-9 Fuse module on P10202-3 Board. M44161-4 Fuse module on P10387-2 board. Output Modules: (left and right are identical) Display Module: Q42670-2 Original output module on P10233-8.
Macro-Tech 2400 Amplifier Service Manual Fuse Module Parts Lists Q42742-9 Fuse Module M44161-4 Fuse Module C1, C2 C 5234-7 .047µF 125V C1, C2 C 5234-7 .047µF 125V D1, D2 C 3181-2 1N4148 Diode D1, D2 C 3181-2 1N4148 Diode 0 Ohm C 5868-2 .25W Jumper R1, R2 A10266-1001 10 Ohm .25W R1, R2 A10266-1001 10 Ohm .
Macro-Tech 2400 Amplifier Service Manual Q42742-9 Display Module (D 6260C4 board) Parts List Capacitors C501 C502 C503 C504 C505 C507 C508 C701 C702 C601 C602 C603 C604 C605 C607 C608 C 6802-0 C 6806-1 C 6806-1 C 7353-3 C 5050-7 C 6809-5 C 6807-9 C 6802-0 C 6802-0 .47µF Ax 50V .01µF Ax 100V .01µF Ax 100V .22µF Ax 50V 4.7µF Ax 100V Lytic 220pF Ax 100V .001µF Ax 100V .47µF Ax 50V .
Macro-Tech 2400 Amplifier Service Manual Q42875-7 Display Module (D 6260C4 board) Parts List Capacitors C501 C502 C503 C507 C701 C702 C601 C602 C603 C607 ICs C 6802-0 C 6806-1 C 6806-1 C 6809-5 C 6802-0 C 6802-0 .47µF Ax .01µF Ax .01µF Ax 220pF .47µF Ax .
Macro-Tech 2400 Amplifier Service Manual Q43442-5 Display Module (D 8897-7 board) Parts List Capacitors C501 C502 C503 C507 C701 C702 C703 C704 C601 C602 C603 C607 ICs C 6802-0 C 6806-1 C 6806-1 C 6809-5 C 6804-6 C 6804-6 C 6804-6 C 6804-6 .47µF Ax .01µF Ax .01µF Ax 220pF .1µF Ax .1µF Ax .1µF Ax .
Macro-Tech 2400 Amplifier Service Manual Q42670-2 Output Module (P10233-8 board) Parts List Capacitors C01 C02 C03 C04 C05 C06 C07 C08 C09 Resistors C 3978-1 C 2938-6 C 2938-6 C 6806-1 C 6806-1 C 6806-1 C 6807-9 C 6810-3 C 6809-5 .047µF .1µF .1µF .01µF .01µF .01µF .
Macro-Tech 2400 Amplifier Service Manual Q42887-2 Output Module (P10315-3 board) Parts List Capacitors C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 Resistors C 8511-5 C 8426-6 C 8426-6 C 6806-1 C 6806-1 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 7697-3 .047µF .1µF .1µF .01µF .01µF .01µF .001µF 180pF 220pF .
Macro-Tech 2400 Amplifier Service Manual Q42985-4 Output Module (P10337-7 board) Parts List Capacitors C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 Resistors C 8511-5 C 8426-6 C 8426-6 C 6806-1 C 6806-1 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 7697-3 .047µF 250V Ax .1µF .1µF .01µF 100V Ax .01µF 100V Ax .01µF 100V Ax .001µF 100V Ax 180pF 220pF .
Macro-Tech 2400 Amplifier Service Manual Q43194-2 Output Module (P10396-3 board) Parts List Capacitors C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 Resistors C 8511-5 C 8426-6 C 8426-6 C 6806-1 C 6806-1 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 7697-3 .047µF 250V Ax .1µF .1µF .01µF 100V Ax .01µF 100V Ax .01µF 100V Ax .001µF 100V Ax 180pF 220pF .
Macro-Tech 2400 Amplifier Service Manual Q43358-3 Output Module (P10433-4 board) Parts List Capacitors C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 Resistors A10434-437JD C 8426-6 C 8426-6 C 6806-1 C 6806-1 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 7697-3 .047µF 250V .1µF .1µF .01µF 100V Ax .01µF 100V Ax .01µF 100V Ax .001µF 100V Ax 180pF 220pF .
Macro-Tech 2400 Amplifier Service Manual Q42667-8 Main Module (D 6978-7 board) Parts List Capacitors C1 C2 C3 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C247 C248 C249 C252 C253 C 4303-1 C 3913-
Macro-Tech 2400 Amplifier Service Manual Q42667-8 Main Module (D 6978-7 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q42667-8 Main Module (D 6978-7 board) Parts List Cont. Misc. Mounts U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 6-32 Nut 6-32 X .
Macro-Tech 2400 Amplifier Service Manual Q42737-9 Main Module (D 6978-7 board) Parts List Capacitors C1 C2 C3 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C247 C248 C249 C252 C253 C 4303-1 C 3913-
Macro-Tech 2400 Amplifier Service Manual Q42737-9 Main Module (D 6978-7 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q42737-9 Main Module (D 6978-7 board) Parts List Cont. Connectors J9 J10 J11 J100 J500 J600 C 6871-5 C 6850-9 C 7077-8 C 6777-4 D 6619-7 D 6620-5 Header, 6 Pin Header, 4 Pin Retainer, 3 Pin Phone Jack 10" Ribbon Assy 6" Ribbon Assy Mounts U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 6-32 Nut 6-32 X .
Macro-Tech 2400 Amplifier Service Manual Q42753-6 Main Module (D 7150-2 board) Parts List Capacitors C1 C2 C3 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C247 C248 C249 C252 C253 C 4303-1 C 3913-
Macro-Tech 2400 Amplifier Service Manual Q42753-6 Main Module (D 7150-2 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q42753-6 Main Module (D 7150-2 board) Parts List Cont. Connectors J9 J10 J11 J100 J500 J600 C 6871-5 C 6850-9 C 7077-8 C 6777-4 D 6619-7 D 6620-5 Header, 6 Pin Header, 4 Pin Retainer, 3 Pin Phone Jack 10" Ribbon Assy 6" Ribbon Assy Mounts U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 6-32 Nut 6-32 X .
Macro-Tech 2400 Amplifier Service Manual Q42777-5 Main Module (D 7251-8 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C8 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C247 C248 C249 C252 C253 C 3913
Macro-Tech 2400 Amplifier Service Manual Q42777-5 Main Module (D 7251-8 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q42777-5 Main Module (D 7251-8 board) Parts List Cont. Connectors J1 J9 J10 J11 J100 J500 J600 C 7593-4 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5 Header, 5 Pin Header, 6 Pin Header, 4 Pin Header, 3 Pin Phone Jack 10" Ribbon Assy 6" Ribbon Assy Mounts U1, U2: (2) C 1889-2 (2) C 2176-3 (2) C 5341-0 (2) C 5594-4 6-32 Nut 6-32 X .
Macro-Tech 2400 Amplifier Service Manual Q42982-1 Main Module (D 7911-7 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C122 C123 C124 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C150 C151 C152 C153 C154 42 C200 C201 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C222 C223 C224 C229 C230 C233 C234 C235 C236 C237 C238 C239 C2
Macro-Tech 2400 Amplifier Service Manual Q42982-1 Main Module (D 7911-7 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q42982-1 Main Module (D 7911-7 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43037-3 Main Module (D 7993-5 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C122 C123 C124 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C200 C201 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C222 C223 C224 C229 C230 C233 C234 C235 C236 C237 C238 C239 C240 C
Macro-Tech 2400 Amplifier Service Manual Q43037-3 Main Module (D 7993-5 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43037-3 Main Module (D 7993-5 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C122 C123 C124 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 48 C200 C201 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C222 C223 C224 C229 C230 C233 C234 C235 C236 C237 C238 C239 C24
Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43132-2 Main Module (D 8283-0 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C122 C123 C124 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C200 C201 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C222 C223 C224 C229 C230 C233 C234 C235 C236 C237 C238 C239 C240 C
Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43272-6 Main Module (D 8283-0 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 board) Parts List Capacitors C1 C2 C4 C5 C6 C7 C100 C101 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C122 C123 C124 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 54 C200 C201 C203 C204 C205 C206 C207 C208 C209 C210 C211 C212 C213 C214 C215 C216 C217 C218 C219 C220 C222 C223 C224 C229 C230 C233 C234 C235 C236 C237 C238 C239 C24
Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 board) Parts List Cont.
Macro-Tech 2400 Amplifier Service Manual Q43257-7 Main Module (D 8369-7 board) Parts List Cont.
