Crown Com-Tech CT-200 Service Manual
  1. Manuals
  2. Brands
  3. Crown Manuals
  4. Amplifier
  5. Com-Tech CT-200
  6. Service manual

Crown Com-Tech CT-200 Service Manual

Crown com-tech ct-200: supplementary guide
Hide thumbs Also See for Com-Tech CT-200:
Table of Contents

Advertisement

Quick Links

See also: Reference Manual
Com-Tech 200 Amplifier Service Manual

POWER AMPLIFIER

SERVICE MANUAL
COM-TECH
®
200
Model CT200B
©1995 by CROWN INTERNATIONAL, INC.
Mailing Address:
Shipping Address:
P.O. Box 1000
57620 C.R. 105
Elkhart, IN U.S.A. 46515-
Elkhart, IN U.S.A. 46517
1000
Com-Tech
®
, ODEP
®
and Crown
®
are registered trademarks of Crown International, Inc.
K-SVCCT200
12-95
1

Advertisement

Table of Contents
loading

Related Manuals for Crown Com-Tech CT-200

Summary of Contents for Crown Com-Tech CT-200

  • Page 1: Power Amplifier

    ©1995 by CROWN INTERNATIONAL, INC. Mailing Address: Shipping Address: P.O. Box 1000 57620 C.R. 105 Elkhart, IN U.S.A. 46515- Elkhart, IN U.S.A. 46517 1000 Com-Tech ® , ODEP ® and Crown ® are registered trademarks of Crown International, Inc. K-SVCCT200 12-95...
  • 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

    Com-Tech 200 Amplifier Service Manual Table of Contents Introduction ... 4 Parts Information ... 5 Specifications ... 6 Theory ... 7 Electrical Checkout Procedures ... 12 Parts List (Non Module) ... 16 Module and Schematic Information ... 19 Q42762-7 Control Module Parts List ... 20 Q43215-5 Control Module Parts List ...

  • Page 4: Introduction

    CT-200B amplifier including the Amcron version. The Parts Listings include parts specific for the US version and the European version (CT-200BE13). For parts specific only to other versions contact the Crown Technical Support Group for help in finding part num- bers.

  • Page 5: Parts Information

    Part Numbering System 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: Theory

    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 8 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 9 Vce under static conditions. The positive and negative halves of the HS output are in parallel with this 3.3V. With a full base-emitter on voltage drop across Figure 2. Crown Patented Grounded Bridge Topology Com-Tech 200 Amplifier Service Manual Theory predrivers and drivers, the balance of voltage results in approximately .35V drop across the bias resistors in...
  • Page 10 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 11 ERROR BALANCED INPUTS Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown) Com-Tech 200 Amplifier Service Manual Theory +VOLTAGE TRANSLATOR OUTPUT DEVICE EMULATION PROTECTION -VOLTAGE TRANSLATOR MAIN NEGATIVE FEEDBACK (NFb) LOOP INVERTING BRIDGE BALANCE POSITIVE +LVA HIGH SIDE...

  • Page 12: Electrical Checkout Procedures

    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. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting.
  • Page 13 Electrical Checkout Procedures 25.0 –10.00 25.6 –9.97 26.7 –9.91 27.8 –9.86 28.9 –9.80 30.0 –9.74 31.1 –9.69 32.2 –9.63 33.3 –9.57 34.4 –9.51 –ODEP Procedure: Measure pin 3 of J500 and, if neces- sary, adjust R121 to obtain V as specified above. –ODEP Measure pin 3 of J500 and, if necessary, adjust R221 to obtain V...
  • Page 14 Electrical Checkout Procedures Test 10: Slew Rate & 10 KHz Square Wave Spec: 17 - 25 V/µS, 8 ohm load. Initial Conditions: Controls per standard. Procedure: Load each channel to 8 ohms. Inject a 10 kHz square wave to obtain 35 Volts zero-to-peak at each output.
  • Page 15 Electrical Checkout Procedures Test 16: Signal to Noise Ratio Spec: 100 dB below 8 ohm rated continuous average 20-20kHz power. Initial Conditions: Controls per standard. Short inputs. Procedure: Load each channel to 8 ohms. Measure less than 290µV at the output of each channel (20 Hz-20 kHz bandpass filter).

  • Page 16: Parts List (Non Module)

    Mounting Clip, TO3P (For Drivers) D 7666-7 Mounting Bracket, TO3P (For Drivers) D 7796-2 Sil Pad, 2.87 x 14.57 (Between Heatsink & Chassis) D 6280-8 Sil Pad for use with Output Board P10315-3 D 6104-0 Sil Pad for use with Output Board P10233-8...
  • Page 17 Nylon Washer, .5 x .136 x .02 (For Grille) A10173-1 Clip, Filter Grille C 5297-4 Screw, 8-32 x .37 (For rack ears) C 6487-0 Power Switch, 2 Pole 22 Amp Rocker D 6944-9 Air Filter, 1.45 x 16.23 F11439J0 Front Panel Overlay F12706-2...
  • Page 18 Main Chassis Assembly Cont. Item C 6457-3 Screw, #8 x 3/8 C 6912-7 Tension Retaining Board Supports C 6913-5 1" Spacer Toggle Nut, Plastic C 6914-3 .75" Spacer Toggle Nut, Plastic C 7705-4 Flat Cable Clamp C 9491-9 Screw, 6-32 x .312 C 9953-8 Screw, 6-20 x .312 C10111-0...

  • Page 19: Module And Schematic Information

    Module and Schematic Information Module History The Com Tech 200B amplifier was introduced in 1990. 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, December 1995.

  • Page 20: Q42762-7 Control Module Parts List

    Q42762-7 Control Module (P10317-9 board) Parts Lists Capacitors C700 C800 C 8426-6 .1µF 250V C701 C801 C 8426-6 .1µF 250V C900 C 8963-8 .47µF 250V C901 C 8963-8 .47µF 250V Diodes D700 D800 C 3181-2 1N4148 D900 C 2851-1 1N4004 Relays C 7860-7 SPST...

  • Page 21: Q43215-5 Control Module Parts List

    Q43215-5 Control Module (P10404-5 board) Parts List Capacitors C700 C800 C 8426-6 .1µF 250V C701 C801 C 8426-6 .1µF 250V C900 C 8963-8 .47µF 250V C901 C 8963-8 .47µF 250V Diodes D700 D800 C 3181-2 1N4148 D900 C 2851-1 1N4004 Relays C 7860-7 SPST...

  • Page 22: Q43244-5 Control Module Parts List

    Q43244-5 Control Module (P10405-2 board) Parts List Capacitors C700 C800 C 8426-6 .1µF 250V C701 C801 C 8426-6 .1µF 250V C900 C 8963-8 .47µF 250V C901 C 8963-8 .47µF 250V Diodes D700 D800 C 3181-2 1N4148 D900 C 2851-1 1N4004 Relays C 7860-7 SPST...

  • Page 23: Q43242-9 Control Module Parts List

    Q43242-9 Control Module (P10405-2 board) Parts List Capacitors C700 C800 C 8426-6 .1µF 250V C701 C801 C 8426-6 .1µF 250V C900 C 8963-8 .47µF 250V C901 C 8963-8 .47µF 250V Diodes D700 D800 C 3181-2 1N4148 D900 C 2851-1 1N4004 Relays C 7860-7 SPST...

  • Page 24: Q42706-4 Display Module Parts List

    Q42706-4 Display Module (D 7083-5 board) Parts List Capacitors C500 C600 C 6802-0 .47µF 50V C901 C 6804-6 .1µF 50V Diodes D500 D600 C 3181-2 1N4148 D501 D601 C 3181-2 1N4148 D900 C 3533-4 1N966B 16V Zener D901 C 3533-4 1N966B 16V Zener LED's E500...

  • Page 25: Q42716-3 Output Module Parts List

    Q42716-3 Output Module (P10233-8 or P10263-5 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 6809-5 220pF C 6850-7 180pF Diodes C 2851-1 1N4004 C 2851-1 1N4004...

  • Page 26: Q42888-0 Output Module Parts List

    Q42888-0 Output Module (P10315-3 board) Parts List Capacitors C 8511-5 .047µF 250V Ax C 8426-6 .1µF C 8426-6 .1µF C 6805-3 .022µF C 6805-3 .022µF C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6809-5 220pF C 6810-3 180pF Diodes C 2851-1...

  • Page 27: Q42969-8 Output Module Parts List

    Q42969-8 Output Module (P10337-7 board) Parts List Capacitors C 8511-5 .047µF 250V Ax C 8426-6 .1µF C 8426-6 .1µF C 6805-3 .022µF C 6805-3 .022µF C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6810-3 180pF C 6809-5 220pF C 7697-3 .01µF...

  • Page 28: Q43188-4 Output Module Parts List

    Q43188-4 Output Module (P10396-3 board) Parts List Cont. Capacitors C 8511-5 .047µF 250V Ax C 8426-6 .1µF C 8426-6 .1µF C 6805-3 .022µF C 6805-3 .022µF C 6806-1 .01µF 100V Ax C 6807-9 .001µF 100V Ax C 6810-3 180pF C 6809-5 220pF C 7697-3 .01µF Disc...

  • Page 29: Q43013-4 Main Module Parts List

    Q43013-4 Main Module (D 7911-7 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF A10124-24 Jumper Wire A10124-24 Jumper Wire 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 30 Q43013-4 Main Module (D 7911-7 board) Parts List 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 Resistors (.25W 5% unless noted otherwise) N100 N200...
  • Page 31 Q43013-4 Main Module (D 7911-7 board) Parts List 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 R295...

  • Page 32: Q43044-9 Main Module Parts List

    Q43044-9 Main Module (D 7993-5 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF A10124-24 Jumper Wire A10124-24 Jumper Wire 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 33 Q43044-9 Main Module (D 7993-5 board) Parts List Q118 Q218 D 2961-7 NPN 2N3859A Q119 Q219 C 3625-8 NPN 2N4125 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...
  • Page 34 Q43044-9 Main Module (D 7993-5 board) Parts List 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 R189 R289 A10266-2731 R190 R290 A10266-2051 R191 R291 A10266-3331 R192 R292 A10266-1031 R193...

  • Page 35: Q43128-0 Main Module Parts List

    Q43128-0 Main Module (D8283-0 board) Parts List Capacitors C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF A10124-24 Jumper Wire A10124-24 Jumper Wire C 8897-8 .1µF C100 C200 C 5311-3 22µF C101 C201 C 9464-6 10pF C103 C203 C 6805-3 .022µF C104 C204...
  • Page 36 Q43128-0 Main Module (D8283-0 board) Parts List 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 Q219 C 3625-8 NPN 2N4125 Q120 Q220...
  • Page 37 Q43128-0 Main Module (D8283-0 board) Parts List 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 R189 R289 A10266-2731 R190 R290 A10266-2051 R191...

  • Page 38: Q43237-9 Main Module Parts List

    Q43237-9 Main Module (D 8369-7 board) Parts List Capacitors C 9859-7 1000µF C 9859-7 1000µF C 6802-0 .47µF A10124-24 Jumper Wire A10124-24 Jumper Wire C 8897-8 .1µF C100 C200 C 5311-3 22µF C101 C201 C 9464-6 10pF C103 C203 C 6805-3 .022µF C104 C204...
  • Page 39 Q43237-9 Main Module (D 8369-7 board) Parts List 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 Q219 C 3625-8 NPN 2N4125 Q120...
  • Page 40 Q43237-9 Main Module (D 8369-7 board) Parts List 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 2.7M R187 R287 A10266-3631 R188 R288 A10266-3631 R189 R289 A10266-2731...

This manual is also suitable for:

Com-tech 200Ct200b

Table of Contents