Micro-Tech 600 Amplifier Service Manual POWER AMPLIFIER SERVICE MANUAL MICRO-TECH -600 ® ©1995 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 Micro-Tech®, ODEP® and Crown® are registered trademarks of Crown International, Inc.
Micro-Tech 600 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.
Micro-Tech 600 Amplifier Service Manual Table of Contents Introduction ............................................................. 4 Scope ...................................................................... 4 Warranty .................................................................. 4 Parts Information ..................................................... 5 Specifications .......................................................... 6 Voltage Conversion .................................................
Micro-Tech 600 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. NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED FOR USE BY AN EXPERIENCED TECHNICIAN ONLY! circuit board may be built up with different parts to create different modules.
Micro-Tech 600 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.
Micro-Tech 600 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.
Micro-Tech 600 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 and only with 60Hz. All other versions of the Micro Tech 600 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.
Micro-Tech 600 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. packaging of this model is designed for maximum watt/price/weight/size value with user friendly features.
Micro-Tech 600 Amplifier Service Manual Theory amplifies the difference between input and output signals, any difference in the two waveforms will produce a near open loop gain condition which in turn results in high peak output voltage. The output of the Error Amp, called the Error Signal (ES) drives the Voltage Translators. The ODEP transistors steal drive as dictated by the ODEP circuitry (discussed later).
Micro-Tech 600 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.
Micro-Tech 600 Amplifier Service Manual Theory respect to each other. This allows the power supply to 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.
Micro-Tech 600 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.
Micro-Tech 600 Amplifier Service Manual Electrical Checkout Procedures GENERAL INFORMATION TEST 3: ODEP VOLTAGE ADJUSTMENT 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. Spec: Bias Per Chart, ±0.1V DC.
Micro-Tech 600 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.
Micro-Tech 600 Amplifier Service Manual Electrical Checkout Procedures TEST 12: OUTPUT POWER Spec at 8 Ohm Stereo: >= 235W at 0.1% THD. Spec at 4 Ohm Stereo: >= 340W at 0.1% THD. Spec at 2 Ohm Stereo: >= 410W at 0.1% THD. International 8 Ohm Stereo: >=220W at 0.1% THD. International 4 Ohm Stereo: >=275W at 0.1% THD. International 2 Ohm Stereo: >=300W 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 43.
Micro-Tech 600 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.
Micro-Tech 600 Amplifier Service Manual Parts List (Non-Module) SUPPLIMENTAL ITEMS CPN D 4137-2 C 3342-0 A10087-71012 K80603-2 ITEM Nylon Thumbscrew Washer Feet, Black Self-Stick 10-32 .75 Machine (Rack Screw) MT Series Owners Manual QTY 4 4 4 1 ITEM MT Fuse Board Assembly (120V, 60Hz Units Only) Fuse Board Insulator Fuse Module, Ch 1 (50-60 Hz Units) Fuse Module, Ch 2 (50-60 Hz Units) 7 Amp Fuse (100-120V Units) 5 Amp Fuse (200-240V Units) .
Micro-Tech 600 Amplifier Service Manual Parts List (Non-Module) OUTPUT ASSEMBLY (CONT.
Micro-Tech 600 Amplifier Service Manual Parts List (Non-Module) MAIN CHASSIS ASSEMBLY (CONT. ) CPN A10110-70605 A10086-70806 A10094-3 A10094-6 A10094-8 A10099-7 A10100-16 A10102-8 A10109-10822 A10110-70812 A10192-1 A11376-6130J A11376-6235J A11394-6160E A11394-6235E C 1811-6 C 1813-2 C 3163-0 C 6709-7 C 6912-7 C 6913-5 C 6914-3 C 9491-9 C 9953-8 C10111-0 D 7622-0 H43424-3 H43451-6 ITEM Screw, 6-32-.312 Taptite Ph (Covers) 8-32 x .
Micro-Tech 600 Amplifier Service Manual Module and Schematic Information MODULE HISTORY FUSE MODULE: The Micro Tech 600 amplifier was introduced in January 1986. Since then there have been several updates and revisions, some of which called for new modules. The following is a list of all modules used up to this date, August 1995. M43534-3 (120V 60Hz U.S. Units Only) Fuse module on P10391-4 board. Q42866-6 -Channel 2 (Universal Volt Units Only) Fuse module on P10296-5 board.
Micro-Tech 600 Amplifier Service Manual Fuse and Display Module Parts Lists M43534-3 FUSE MODULE CPN C 5060-6 P10391-4 Item PC Mount Fuse Clip MT Fuse Board Q43061-3 ODEP DISPLAY MODULE Qty 6 1 Q42866-6 CHANNEL 2 FUSE MODULE CPN A10124-24 C 5060-6 C 7817-7 C 8537-0 C 8539-6 P10296-5 Item #24 Solid Buss Wire PC Mount Fuse Clip Faston, Tab .
Micro-Tech 600 Amplifier Service Manual Q42549-8 Output Module (P10115-7 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3 .047µF .1µF .1µF .0047µF .001µF .01µF .001µF 220pF 180pF R21 R22 R23 R24 R25 R26 R27 R28 R30* C 3299-2 C 4479-9 C 6844-2 A10266-1331 A10266-2221 C 6844-2 A10266-3911 A10266-1331 A10265-10201* 5.6 .5W 22 250 Pot 13K 2.
Micro-Tech 600 Amplifier Service Manual Q42647-0 Output Module (P10137-1 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3 .047µF .1µF .1µF .0047µF .001µF .01µF .
Micro-Tech 600 Amplifier Service Manual Q42717-1 Output Module (P10233-8 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 3218-2 C 3218-2 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 .047µF .22µF .22µF .0047µF .001µF .01µF .
Micro-Tech 600 Amplifier Service Manual Q42871-6 Output Module (P10305-4 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .
Micro-Tech 600 Amplifier Service Manual Q42968-0 Output Module (P10341-9 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF .
Micro-Tech 600 Amplifier Service Manual Q43202-3 Output Module (P10397-1 board) Parts List CAPACITORS C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .
Micro-Tech 600 Amplifier Service Manual Q42552A0 Main Module (D6304A4/D6304B2 board) Parts List CAPACITORS C1 C2 C3 C4 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C124 C125 C127 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C224 C225 C227 C233 C234 C235 C236 C237 C238 C239 C240 C241 C242 C 4303-1 C 3913-8 C 4303-1 C 6802-0 C 5053-1 C 2821-4 C 6805-3 C 6805-3 C 6950-7 C 6950-7 C 6812-9 C 6803-8 C
Micro-Tech 600 Amplifier Service Manual Q42552A0 Main Module (D6304A4/D6304B2 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q42713-0 Main Module (D 6910-0 board) Parts List CAPACITORS C1 C2 C3 C4 C5 C6 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 C149 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 4303-1 C
Micro-Tech 600 Amplifier Service Manual Q42713-0 Main Module (D 6910-0 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q42776-7 Main Module (D 7251-8 board) Parts List DIODES 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 C129 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C150 C151 C152 C153 32 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C229 C230 C233 C234 C235 C236 C237 C238 C239 C240 C241 C244 C245 C246 C
Micro-Tech 600 Amplifier Service Manual Q42776-7 Main Module (D 7251-1 board) Parts List Cont. Q116 Q117 Q118 Q119 Q120 Q121 Q122 Q216 Q217 Q218 Q219 Q220 Q221 Q222 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 7458-0 C 7458-0 PN4250A 2N3859A 2N3859A 2N4125 2N4125 2N4123 2N4123 A10265-53621 A10266-2402 A10266-2402 A10265-46421 A10266-3321 53.6K 24 OHM 24 OHM 46.4K 3.3K OPEN 5.6K 43K 1K 8.2K 620 OHM OPEN 4.99K 1K 100K 2.7K 2.7K 12K 68K 1K 82 OHM 68K 12K 51K 4.7K 4.7K 510K 3.
Micro-Tech 600 Amplifier Service Manual Q42776-7 Main Module (D 7251-1 board) Parts List Cont. INTEGRATED CIRCUITS U1 U2 U100 U103 U104 U200 U203 U204 C 5095-2 C 5096-0 C 6911-9 C 6910-1 C 6900-2 MC7815 MC7915 UPA75 PNP UPA76 NPN MC34084P C 7593-4 C 4508-5 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5 HDR, 5 PIN 16 PIN Soc HDR, 6 PIN HDR, 4 PIN HDR, 3 PIN PH.
Micro-Tech 600 Amplifier Service Manual Q42983-9 Main Module (D7911-7 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 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 C2
Micro-Tech 600 Amplifier Service Manual Q42983-9 Main Module (D7911-7 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q42983-9 Main Module (D7911-7 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q43038-1 Main Module (D7993-5 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 38 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
Micro-Tech 600 Amplifier Service Manual Q43038-1 Main Module (D7993-5 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q43038-1 Main Module (D7993-5 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q43033-2 Main Module (D7993-5 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 C24
Micro-Tech 600 Amplifier Service Manual Q43033-2 Main Module (D7993-5 board) Parts List Cont.
Micro-Tech 600 Amplifier Service Manual Q43033-2 Main Module (D7993-5 board) Parts List Cont.