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130366-1 Rev. A MA-3600VZ 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.
1.3 Scope 1.1 Introduction This Service Manual in intended to apply to all This manual contains complete service information on versions of the MA-3600VZ amplifier. The Parts ® the Crown MA-3600VZ power amplifi er. It is designed Listings include parts specifi c for the US version and to be used in conjunction with the Reference Manual;...
MA-3600VZ Service Manual 130366-1 Rev. A 120 VAC International Units: Stereo mode with both channels driven: 2 Specifi cations 1490 watts into 2 ohms. 1300 watts into 4 ohms. watts into 8 ohms. These specifi cations apply to 120 VAC units in stereo mode with 8 ohm loads and an input Bridge-Mono mode: sensitivity of 26 dB unless otherwise specifi...
130366-1 Rev. A MA-3600VZ Service Manual ence. In the unlikely event the output waveform differs from 2.7 Construction that of the input by 0.05% or more, they fl ash brightly to indi- Durable black powder coated steel chassis and aluminum cate distortion.
MA-3600VZ Service Manual 130366-1 Rev. A front panel and are of the rotary type. Front panel indicators let the user know the status of the low 3 Theory of Operation voltage power supply (enable), an ODEP indicator for each channel which shows the reserve energy status, and a SPI/IOC indicator for each channel which 3.1 Overview...
130366-1 Rev. A MA-3600VZ Service Manual an AC coupling capacitor and input resistor. Amplifi er Also tied into the Voltage Translator inputs are output is fed back via the negative feedback (NFb) ODEP limiting transistors and control/protection loop resistor. The ratio of feedback resistor to input transistors.
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MA-3600VZ Service Manual 130366-1 Rev. A HS bias is regulated by Q18, the Bias Servo. Q18 3.5.1 High Side (HS) is a Vbe multiplier which maintains approximately The High Side (HS) of the bridge operates much like 3.3V Vce under static conditions. The positive and a conventional bipolar push-pull output confi...
130366-1 Rev. A MA-3600VZ Service Manual 3.6 Output Device Emulation Protection and are biased AB+B in the same manner as the (ODEP) To further protect the output stages, a specially When the amplifi er output swings positive, the audio developed ODEP circuit is used. It produces is fed to an op-amp stage where it is inverted.
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MA-3600VZ Service Manual 130366-1 Rev. A According to Ohm’s Law, the bigger the power VZ POWER SUPPLY supply, the more heat the power transistors must dissipate. Also, the lower the resistance of the power POWER transistors, the more voltage you can deliver to TRANSISTOR the load.
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130366-1 Rev. A MA-3600VZ Service Manual • Higher than normal on-state drain to source FETs at pin 5. R17 in series with R18 forms a voltage voltage divider to pin 5 of U05. The reference is set by a voltage divider formed by R29, R20, and R22.
MA-3600VZ Service Manual 130366-1 Rev. A All tests assume that AC power is from a regulated AC source appropriate for the unit under test.. Test 4 Maintenance equipment includes an oscilloscope, a DMM, a signal generator, loads, and I.M.D. and T.H.D. noise test equipment.
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130366-1 Rev. A MA-3600VZ Service Manual 4.3.6 Test 5: Common Mode Rejection °F °CV –ODEPV +ODEP 18.9 –11.31 11.31 Spec at 1KHz: –70 dB. 20.0 –11.26 11.26 Initial Conditions: Sensitivity switch in 0.775V 21.1 –11.20 11.20 Procedure: No load. Inject a 0 dBu (.775VRMS) 1K 22.2...
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MA-3600VZ Service Manual 130366-1 Rev. A 4.3.9 Test 8: Level Controls Procedure: 8 ohm load on each channel. Inject a 20 kHz sine wave into the Channel 1 input and increase Spec: Level controlled by level controls. output level to 80 VAC. Measure less than 80 mVAC Initial Conditions: Controls per standard.
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130366-1 Rev. A MA-3600VZ Service Manual 4.3.18 Test 17: Turn On Transients Procedure Torture: Load each channel with the primary (red and black leads) of a PSU transformer Spec: No dangerous transients. (D 7040-5). Inject a 35 Hz sine wave for an output Initial Conditions: Controls per standard.
MA-3600VZ Service Manual 130366-1 Rev. A established, after which an amount due will be issued and shipment made upon receipt of payment. New 5 Parts parts returned for credit are subject to a restocking fee, and authorization from the Crown Parts Depart- ment must be obtained before returning parts for 5.1 General Information...
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MA-3600VZ Service Manual 130366-1 Rev. A 5.3.1 Top Chassis Assembly Refer to Figure 5.1 for Exploded View Item Quantity Description Part # (CPN) Front Assembly see Section 5.3.3 Chassis F12621-3 see Section 5.3.3 see Section 5.3.3 see Section 5.3.6 Heatsink Assembly see Section 5.3.8...
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MA-3600VZ Service Manual 130366-1 Rev. A 5.3.2 Bottom Chassis Assembly Refer to Figure 5.2 for Exploded View Item Quantity Description Part # (CPN) Chassis see Section 5.3.1 Pad, VZ Thru Hole D7839-0 Note: use CPN #D 7679-0 with Output PWB P10316-1 and earlier.
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MA-3600VZ Service Manual 130366-1 Rev. A 5.3.3 Front Assembly Refer to Figure 5.3 for Exploded View Item Quantity Description Part # (CPN) Foam Filter D7696-4 Screw, #8 x 1.00 Type AB Flat HD A10103-10816 Nylon Spacer A10101-12 Grille Clip A10173-1...
MA-3600VZ Service Manual 130366-1 Rev. A 5.3.4 Back Panel Assembly Refer to Figure 5.4 for Exploded View Item Quantity Description Part # (CPN) Dual Binding Post C10184-7 Screw, 8-32 x .37 RDHD MSCR A10086-70806 #8 Int Star Washer, Black A10094-5 Standard PIP Assembly See Section 5.3.9...
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MA-3600VZ Service Manual 130366-1 Rev. A 5.3.6 Channel 2 (Right) Bi-Level Switch Assembly Refer to Figure 5.6 for Exploded View Item Quantity Description Part # (CPN) Right Shelf 125238-1 PWA, B-L Switch See Section 5.4 Screw, 6-32 x .25 Socket Cap...
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130366-1 Rev. A MA-3600VZ Service Manual 5.3.7 Fan Assembly Refer to Figure 5.7 for Exploded View Item Quantity Description Part # (CPN) Screw, 6-32 x 5/16 FLTHD C 7062-0 Fan Bracket D8439-8 Screw, 6-32 x .312 Pan HD T15 Taptite...
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MA-3600VZ Service Manual 130366-1 Rev. A 5.3.8 Heatsink Assembly (Channel 1 and 2 are Identical) Refer to Figure 5.8 for Exploded View Item Quantity Description Part # (CPN) Screw, 6-32 x .312 Pan HD T15 Taptite C 9491-9 NPN Power Transistor...
MA-3600VZ Service Manual 130366-1 Rev. A 5.4 Circuit Board Parts Q43382-3 Main PWA with Quad-Mute on D 8920-7 PWB. Not This section includes electrical parts lists for this reverse compatible. For schematic see J0675-9. product. All serviceable parts and assemblies will...
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130366-1 Rev. A MA-3600VZ Service Manual Q43323-7 VZ switch PWA on D 8589-0 PWB. For schematic see J0561-1. Bridge PWAs: Used with Q43323-7 VZ Switch PWA Only Q43411-0 Channel 2 bridge PWA on D 8870-4 PWB. For schematic see J0699-9.
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MA-3600VZ Service Manual 130366-1 Rev. A Q42893-0 Output PWA (P10316-1 PWB) Parts List Capacitors Resistors C 3978-1 .047µF C 5236-2 C 8426-6 .1µF C 2872-7 C 8426-6 .1µF C 8544-6 8.2 .5W C 6806-1 .01µF C 3583-9 .33 5W C 6806-1 .01µF...
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130366-1 Rev. A MA-3600VZ Service Manual Q43100-9 Output PWA (P10373-2 PWB) Parts List C 3583-9 .33 5W Capacitors C 3583-9 .33 5W A10434-473JD .047µF C 3583-9 .33 5W C 8426-6 .1µF C 7779-9 C 8426-6 .1µF A10266-1011 C 6806-1 .01µF C 6625-5 5.6 5W...
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MA-3600VZ Service Manual 130366-1 Rev. A Q43318-7 Output PWA (P10423-5 PWB) Parts List C 3583-9 .33 5W Capacitors C 3583-9 .33 5W A10434-473JD .047µF C 3583-9 .33 5W C 8426-6 .1µF C 3583-9 .33 5W C 8426-6 .1µF C 7779-9 C 6806-1 .01µF...
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MA-3600VZ Service Manual 130366-1 Rev. A Q42942-5 Main PWA (D 7686-5 PWB) Parts List C157 C257 C 6813-7 27pF Capacitors C158 C258 C 6806-1 .01µF C 3913-8 470µF C159 C259 C 8551-1 .01µF C 4303-1 1000µF C160 C260 C 6811-1...
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130366-1 Rev. A MA-3600VZ Service Manual Q42942-5 Main PWA (D 7686-5 PWB) Parts List Cont. Q118 Q218 D 2961-7 2961 R129 R229 A10266-1041 100K Q119 Q219 C 3625-8 2N4125 R130 R230 A10266-1041 100K Q120 Q220 C 3625-8 2N4125 R131 R231...
MA-3600VZ Service Manual 130366-1 Rev. A Q42942-5 Main PWA (D 7686-5 PWB) Parts List Cont. R187 R287 A10266-3631 Switches R188 R288 A10266-3631 C 7325-1 DPDT, GND LFT R189 R289 A10266-2731 C 7363-2 Input Sensitivity R190 R290 A10266-2051 C 6781-6 6P3T, MONO...
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130366-1 Rev. A MA-3600VZ Service Manual Q43107-4 Main PWA (D 8102-2 PWB) Parts List C156 C256 C 6804-6 .1µF Capacitors C157 C257 C 6813-7 27pF C 3913-8 470µF C159 C259 C 8551-1 .01µF C 4303-1 1000µF C160 C260 C 6811-1...
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MA-3600VZ Service Manual 130366-1 Rev. A Q43107-4 Main PWA (D 8102-2 PWB) Parts List Cont. Q111 Q211 C 8103-1 MPSW42 R123 R223 A10266-2432 24K .5W Q112 Q212 C 3625-8 2N4125 R124 R224 A10265-11021 11K 1% Q113 Q213 C 3625-8 2N4125...
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130366-1 Rev. A MA-3600VZ Service Manual Q43107-4 Main PWA (D 8102-2 PWB) Parts List Cont. R179 R279 A10265-10011 1K 1% Switches R180 R280 A10266-4711 C 7325-1 DPDT, GND LFT R181 R281 A10265-48711 4.87K C 7960-5 Input Sensitivity R182 R282 A10266-2201...
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MA-3600VZ Service Manual MA-3600VZ Service Manual 130366-1 Rev. A 130366-1 Rev. A Q42859-1 Control PWA (P10291-6 PWB) Parts List Capacitors Diodes C801 C 5234-7 .047µF D801 C 2851-1 1N4004 C802 C 5234-7 .047µF D802 C 2851-1 1N4004 Resistors Transistors R801...
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130366-1 Rev. A MA-3600VZ Service Manual Q43296-5 Control PWA (D 8543-7 PWB) Parts List Capacitors Resistors C801 C 5234-7 .047µF R801 A10266-1001 10 Ohm C802 C 5234-7 .047µF R802 A10266-1001 10 Ohm C803 C 8897-8 .01µF R803 A10266-1821 1.8K C804 C 8897-8 .01µF...
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MA-3600VZ Service Manual 130366-1 Rev. A Q43363-3 Control PWA (D 8696-3 PWB) Parts List Capacitors Resistors C801 C 5234-7 .047µF R801 A10266-1001 10 Ohm C802 C 5234-7 .047µF R802 A10266-1001 10 Ohm C803 C 8897-8 .01µF R803 A10266-1821 1.8K C804 C 8897-8 .01µF...
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130366-1 Rev. A MA-3600VZ Service Manual Q42861-7 VZ Switch PWA (D 7272-4 PWB) Parts List Capacitors Integrated Circuits C 2821-4 10pF C 7444-0 LM393 C 2821-4 10pF C 7445-7 LM555 C 3411-3 200pF C 4345-2 LM339 C 3728-0 10µF C 3411-3...
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MA-3600VZ Service Manual 130366-1 Rev. A Q43123-1 VZ Switch PWA (D 8174-1 PWB) Parts List Capacitors Resistors C 2288-6 .001µF C 2872-7 C 2821-4 10pF C 7852-4 2.4K 5W C 2821-4 10pF A10265-90921 90.9K 1% C 3411-3 200pF C 5707-2...
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130366-1 Rev. A MA-3600VZ Service Manual Q43181-9 VZ Switch PWA (D 8174-1 PWB) Parts List Capacitors Resistors C 2288-6 .001µF C 2872-7 C 2821-4 10pF C 7852-4 2.4K 5W C 2821-4 10pF A10265-90921 90.9K 1% C 3411-3 200pF C 5707-2...
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MA-3600VZ Service Manual 130366-1 Rev. A Q43298-1 VZ Switch PWA (D 8174-1 PWB) Parts List Capacitors Resistors C 2288-6 .001µF A10266-1011 C 2821-4 10pF C 7852-4 2.4K 5W C 2821-4 10pF A10265-90921 90.9K 1% C 3411-3 200pF A10265-10031 100K 1% C 3728-0 10µF...
MA-3600VZ Service Manual 130366-1 Rev. A 6 Schematic Diagrams The schematics referenced and provided are representative only. There may be slight variations between amplifi er to amplifi er. These schematics are intended to be used for troubleshooting purposes only. J0453-1...
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