Crown_CTs600,_CTs1200_Service_Manual电路图.pdf

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1、 Service Manual CTs600 Model CTs1200 Model RadioFans.CN 收音机爱 好者资料库 Table of Contents Section 1 .Disassembly Procedure 1.1.Test Specifications 1.2.CTs Update and Check out List 1.3.Assembly Drawings 1.4.CTs600 120V BOM 1.5. CTs600 120V Schematic 138533-3 1.6.CTs600 230V BOM 1.7.CTs600 230V Schematic

2、138554-3 2.CTs1200 120V BOM 2.1.CTs1200 120V Schematic 138536-6 2.2.CTs1200 230V BOM 2.3.CTs1200 230V Schematic 138537-3 RadioFans.CN 收音机爱 好者资料库 Section 1 Disassembly Procedure RadioFans.CN 收音机爱 好者资料库 Page 1 1. Turn the amplifier so that the back panel is facing you. In these instructions, Right is

3、toward your right hand and Left is toward your left hand. 2. Remove the PIP module. 3. Remove 7 cover screws. 4. Lift off the amplifier cover. Discharge the electrolytic capaci- tors. Then you should measure 50 ohms between FB909 and FB910, which are near the front-right side of the amplifier. 5. Re

4、move 1 screw by the IEC connector, 1 screw on the right panel, and 2 screws by the output barrier block. 6. Remove the shield near the IEC outlet on the right. 7. Slide the plastic push rod forward and pull it out. 8. Write down the colors and attachment points of the the wires on the IEC connector

5、and circuit breaker. Remove those wires from the connectors. 9. On the outside of the rear panel, use a pliers to pinch the tabs on the circuit breaker, and shove the breaker into the unit to remove it. 10. Using a screwdriver, press inward on the top and bottom tabs of the IEC connector, and shove

6、the connector out of the unit to remove it. 11. Find the plastic light pipes near the front panel. Pull them out, or just life up the back of the pipes and fold the pipes toward the front panel. This process might lose some adhesive that was on the pipes. 12. Remove 11 screws from the board. 13. Loc

7、ate the two large capacitors near the front panel toward your right. There is a screw on the PC board between the chassis and those capacitors. Remove it. 14. Locate the metal bracket on your right side by those two capacitors. Leave in place the 2 screws that hold down the bracket. Also keep the gr

8、ey fish-paper plenum in place. 15. Lift up the front of the board and push the board forward to clear the switches from the back panel. Lift up the board from the back. 16. The board functions correctly outside of the chassis; it does not need to be connected to the chassis. Re-assembly 1. Turn the

9、amplifier so that the rear panel is facing you. 2. Put the board into the chassis front first, and push it toward the front panel of the chassis. Lower the back of the board into the chassis. If switches or knobs on the board rub the back panel, push the board further forward. 3. Pull the board stra

10、ight back to insert the switches into the rear- panel holes. 4. Locate the two large capacitors near the front panel toward your right. Insert a screw into the board between the chassis and those capacitors. 5. Replace the 11 screws in the board. 6. Replace the plastic light pipes and/or their adhes

11、ive if neces- sary. Insert the light pipes near the front panel. 7. Replace the circuit breaker into its hole in the rear panel. The tabs will snap into place. 8. Replace the IEC connector into its hole in the rear panel. The tabs will snap into place. 9. Referring to your notes, plug the correct wi

12、res into the IEC connector and circuit breaker. 10. Insert the plastic push rod into the front panel and put it in place. 11. Replace the shield near the IEC outlet on your right. 12. Replace 1 screw by the IEC connector, 1 screw on the right panel, and 2 screws by the output barrier block. 13. Make

13、 sure the PIP cables come up through the PIPs hole in the rear panel, then replace the amplifier cover. 14. Replace the 7 cover screws. 15. Replace the PIP module. DISASSEMBLY OF CTs 600 AND CTs 1200 Section 1.1 Test Specifications CTs 600/1200 Production Test Specification (Preliminary) Last edit b

14、y EB 3/26/02 Last edit by DRB 4/11/02 modified section 3, programming serial eprom Last edit by EB 5/07/02 Last edit by EB 8/01/02 Added tolerance to 2h and 2p. Last edit by EB 10/14/02 Added gain specifications Last edit by EB 10/21/02 Clarified frequency response adjustment Definitions Minimum Spe

15、cification: A specification that is 100% guaranteed to our customers, or a specification that must be met for proper operation of the amplifier. Typical Specification: A specification that is not 100% guaranteed to our customers, or a specification that represents typical performance that can be exp

16、ected of the amplifier. Regulatory Specification: A specification that must be met in order to comply with regulatory standards. Many of these involve tests that are required on 100% of units. Notes: 1) all test specs verified on both channels unless specified otherwise 2) all loads are resistive +/

17、-0.1% unless specified otherwise 3) all specifications assumed at 1khz sine-wave unless specified otherwise 4) gain setting is in the 26db position. Initial Setup 1. Set Bias a. Set and verify bias to 0.350 +/-0.02VDC. b. This spec assumes amplifier has been powered for at least one minute prior to

18、adjustment at ambient temp = 23degC +/-3degC. 2. Set JTS a. Set R313, R317, R379, R391, R413, R417, R479, R491 to mid position. b. Apply a 3.5Vrms 10Hz signal to the amplifier inputs (26 db gain position). c. Adjust R317 for minimum AC voltage from TP5 to TP121. d. Remove the 10Hz signal from the am

19、plifier input. e. Measure the DC voltage from TP5(neg) to TP121(pos) (-10.5 to -12.5Vdc). f. Add 20V to the measurement in step e ( around +9Vdc). g. Place jumpers on Z102 and Z103 and note that the fans run on high speed. h. Adjust R313 for the voltage determined on step f +/-0.25V. i. Remove the Z

20、102 and Z103 jumpers. j. Apply a 3.5Vrms 10Hz signal to the amplifier inputs. k. Adjust R391 for minimum AC voltage from TP7 to TP123. l. Remove the 10Hz signal from the amplifier input. m. Measure the DC voltage from TP7(neg) to TP123(pos) (+10.5 to +12.5Vdc). n. Subtract 20V from the measurement i

21、n step m (around -9Vdc). o. Place jumpers on Z104 and Z105. p. Adjust R379 for the voltage determined on step n +/-0.25V. q. Remove the Z104 and Z105 jumpers. r. Repeat steps b through q for CH2 3. Program PIP Serial EEPROM Example Address Data Description 0000h 43 Manufacturer Name in ASCII = CROWN

22、 0001h 52 0002h 4F 0003h 57 0004h 4E Note: Null termination indicates end of data. 0005h 0 0006h 0 0007h 0 0008h 0 0009h 0 000Ah 31 Serial Number in ASCII 000Bh 32 000Ch 33 Example = 123456 000Dh 34 000Eh 35 Note: Null termination indicates end of data. 000Fh 36 0010h 0 0011h 0 0012h 0 0013h 0 0014h

23、 30 Date Code in ASCII 0015h 31 0016h 30 Example = 0102 0017h 32 0018h 43 Model Name in ASCII 0019h 54 001Ah 73 CTs 600 = CTs 600, CTs 1200 = CTs 1200 001Bh 20 Example = CTs 1200 001Ch 31 001Dh 32 Note: Null termination indicates end of data. 001Eh 30 001Fh 30 0020h 0 0021h 0 0022h 6E AO1 Scaling Co

24、efficient 0023h 0 CTs600/1200=110 ($6E), CTs2000/3000=165 ($A5) 0024h 0 Example = 110 0025h 0 0026h 6E AO2 Scaling Coefficient 0027h 0 CTs600/1200=110 ($6E), CTs2000/3000=165 ($A5) 0028h 0 Example = 110 0029h 0 002Ah 50 PIP Interface Revision Level = PIP2B 002Bh 49 002Ch 50 002Dh 32 002Eh 42 002Fh 0

25、 0030h 0 0031h 0 0032h 0 0033h 0 0034h 0 0036h XX : : : : : : 007Fh XX Not Assigned, Available to PIP. Do not program. 0080h 78 AC Line Voltage = 120 ($78), 230 ($E6) Example = 120 0081h XX : : : : : : 00FFh XX Reserved for future use. Do not program. Performance and Operation Verification: 1. DC of

26、fset a. Verify less than 2mvDC. 2. Residual Noise a. Verify less than 150uVrms 20-20kHz + A-wgt or, b. Verify less than 350uVrms A-wgt or, c. Verify less than 500uVrms 20-20kHz. 3. Common Mode Rejection a. Verify better than 50dB at 60Hz. b. Assumes 20-20kHz measurement bandwidth limit 4. Frequency

27、Response a. Apply 1Khz 1V signal to the amplifier input as a reference. b. Adjust R181,281 at 20kHz to be -.2dB (+/-0.1dB) from the 1kHz reference. c. Verify overall system frequency response is within +/-0.25dB of 1kHz reference over 20-20kHz. 5. SMPTE IMD a. Verify 0 and 30db IMD0.05% 6. Bench Pow

28、er + Distortion: a. CTs 1200: i. Verify less than 0.10% THD+N with 71.6Vrms at 1kHz sine into 8ohms. This spec is yields 640 watts which is 1.05 times the published power spec. ii. Verify less than 0.05% THD+N with 50.6Vrms at 20Hz sine into 4ohms. This spec yields 640watts which is 1.05 times the p

29、ublished power spec. iii. Verify less than 0.50% THD+N with 54.2Vrms at 20kHz sine into 4ohms. This spec yields 735watts which is 1.05 times the published spec. b. CTs 600: i. Verify less than 0.10% THD+N with 71.6Vrms at 1kHz sine into 16ohms. This gives 320watts which is 1.05 times the published s

30、pec. ii. Verify less than 0.05% THD+N with 35.5Vrms at 20Hz sine into 4ohms. This gives 315watts which is 1.05 times the published spec. iii. Verify less than 0.50% THD+N with 38.4Vrms at 20kHz sine into 4ohms. This gives 367watts which is 1.05 times the published spec. 7. Cooling Fans: a. Verify fa

31、ns off at 40C b. Verify fans on at 60C c. Verify audible fan noise less than 70db a weighted 1 meter 8. Protection and Abnormal Load Durability a. Peak Current Limit i. Verify the peak amplifier output current is 16Apk Iout 18Apk using 1khz sine burst into 1ohm or less resistive load. b. Cap Load i.

32、 Verify the amplifier output signal is stable with no visible oscillations or protection cycling for up to 10seconds when driving 30Vrms at 20kHz sine-wave into load made of R= 8ohm in parallel with 2.0 Cap 2.2uF. c. Inductive Load i. Verify the amplifier protects itself for sine-wave output at 70Vr

33、ms/1kHz driven into load of R = 8ohm in parallel with 159uH L 4.2VDC) and amp in standby when RS signals low ( 14V/uS as measured from 20% to 80% of peak output voltage using a 10kHz or equivalent square wave into an 8ohm load. 19. Cross talk a. Verify cross talk less than 60dB with pink noise or an

34、y sine frequency up to 10kHz while driving 4-8ohm load 12dB below midband frequency into 4-8ohms. 20. High/Low Line Operation a. Verify amp operates within range of +10 to 25% of nominal line 21. Safety Ground a. Verify the resistance between amplifier chassis and ground connection of power cord (or

35、 IEC inlet if no cord) is intact and measures 0.1ohm or less. b. This test must be performed on every amplifier before shipment per UL6500, Annex N, or factory audit file. 22. Hi-Pot a. Verify the amplifier dielectric for rated mains voltage as shown in table. Rated Mains Voltage Applied Voltage (1s

36、ec) 150Vrms 2120VDC b. Voltage is applied to power cord terminals, between safety ground and line/neutral where line and neutral are connected together for test. c. Applied voltage must be in accordance with UL6500. d. During the test, the amplifier power switch must remain in the “ON” position. Shi

37、pping State 1. The amplifier shall be verified in the following state for pack and shipment. a. Back panel pots full cw b. Filter switches = flat c. Input sensitivity = 1.4 for 8/4ohms d. Breaker = normal e. Sleep mode jumpers = enable sleep mode f. PIP-BBY installed g. Bridge-mono switch = dual h.

38、Power Switch = off Published Specifications 1. Noise a. 104dB 20-20kHz b. 106dB A-wgt c. 110dB 20-20kHz + A-wgt 2. Frequency Response a. +/-0.25dB 20-20kHz 3. Cross talk a. Below 80dB from 20Hz to 1kHz b. Below 60dB from 1kHz to 20kHz 4. Damping Factor a. Greater than 1000 at 100Hz. b. Greater than

39、500 from 20-400Hz. 5. Quiescent Power Draw a. Less than 40W (Standby) b. Less than 80W (Ready) 6. DC Offset a. Less than 10mV 7. CMR a. Better than 50dB at 60Hz 8. SMPTE Intermodulation Distortion: a. Less than 0.5% from 30dB below rated power up to rated power into 8ohm load. 9. Power + Distortion

40、(THD+N) a. Highlighted specs verified in production spec CTs 1200 0.05% 0.10% 0.35% 1% 8ohm 20-20k 600 1k 600 4ohm 20-20k 600 1k 600 2ohm 20-20k 1k 250 70V 20-20k 600 1k 100V 20-20k NR DUAL 1k NR 8 ohm 20-20k 1200 1k 1000 4 ohm 20-20k 1k 500 140V 20-20k 1200 1k 1200 200V 20-20k NR BRIDGE 1k NR CTs 6

41、00 0.05% 0.10% 0.35% 1% 8ohm 20-20k 300 1k 300 4ohm 20-20k 300 1k 300 2ohm 20-20k 150 1k 150 70V 20-20k NR 1k NR 100V 20-20k NR DUAL 1k NR 8 ohm 20-20k 600 1k 600 4 ohm 20-20k 300 1k 300 140V 20-20k 600 1k 600 200V 20-20k NR BRIDGE 1k NR Typical Power Specs: CTs 1200 0.05% 0.10% 0.35% 1% 8ohm 20-20k

42、 1k 4ohm 20-20k 1k 2ohm 20-20k 1k 70V 20-20k 1k 100V 20-20k DUAL 1k 8 ohm 20-20k 1k 4 ohm 20-20k 1k 140V 20-20k 1k 200V 20-20k BRIDGE 1k CTs 600 0.05% 0.10% 0.35% 1% 8ohm 20-20k 1k 4ohm 20-20k 1k 2ohm 20-20k 1k 70V 20-20k 1k 100V 20-20k DUAL 1k 8 ohm 20-20k 1k 4 ohm 20-20k 1k 140V 20-20k 1k 200V 20-

43、20k BRIDGE 1k 10. High Pass Filters 11. Compliance a. Safety Standards i. EN 60065: 1998 Safety Requirements Audio Video and Similar Electronic Apparatus b. Electromagnetic Compatibility Standards c. Emissions i. EN 55103-1:1995 Electromagnetic Compatibility Product Family Standard for Audio, Video,

44、 Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions ii. EN 55103-1:1995 Magnetic Field Emissions-Annex A 10 cm and 1 M iii. EN 61000-3-2:1995 Limits for Harmonic Current Emissions (equipment input current 16 A per phase) iv. EN 61000-3-3:1995 Limitation

45、 of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current 16A v. EN 55022:1992 + A1: 1995 Conducted, Class A d. Immunity i. EN 55103-2:1996 Electromagnetic Compatibility Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Pro

46、fessional Use, Part 2: Immunity ii. EN 61000-4-2:1995 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) iii. EN 61000-4-3:1996 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A) iv. EN 61000-4-4:1995 Electrical Fast Transient

47、/Burst Immunity (Criteria B) v. EN 61000-4-5:1995 Surge Immunity (Criteria B) vi. EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A) vii. EN 61000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variation 1. Section 1.2 CTs Update and Check out List CTS Update and Checkout List Crown Technical Support PO Box 1000 Elkhart IN 46515 Ph 800-342-6939/574-294-8200 Fax 574-294-8301 Page 1 of 2 *