Classe-CP65-pre-sm维修电路原理图.pdf

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1、CP-65 Class PREAMPLIFIER SERVICE MANUAL v 1.0 RadioFans.CN 收音机爱 好者资料库 Index Mechanical Assembly3 PC Boards17 Testing Procedures30 Diagrams33 RadioFans.CN 收音机爱 好者资料库 CP-65 MECHANICAL ASSEMBLY 1 MS-2347 PHILIPS 2 L1A2XR01 3 L1A3XR02 CP-65 FACE PLATE ASSEMBLY Class - 1 MODEL CP-65MODEL CP-65 STANDBYSTA

2、NDBYSELECTORSELECTOR TAPETAPE MUTEMUTE 3 1 2 OUTPUT1OUTPUT1 OUTPUT2OUTPUT2 FACE PLATE ASSEMBLY 1 2 3 4 5 L214XR01-S 6 Class - 2 1 2 3 6 5 4 TOP VIEW SIDE VIEW 1 SIDE VIEW 2 CP-65 CHASSIS REAR VIEW 1 2 3 4 5 6 7 8 Class - 3 CP-65 CHASSIS 1 PLA CAPFR1 2 HDW #8 FLAT WASHER 3 BZO 8-32x3/4” BHCS 4 Class

3、- 6 1 2 3 4 TOP VIEW CP-65 SHIPPING AREA - FINAL ASSY 1 2 Class - 9 MODEL CP-65MODEL CP-65 STANDBYSTANDBYSELECTORSELECTOR TAPETAPE MUTEMUTE 2 1 CP-65 OUTPUT1OUTPUT1 OUTPUT2OUTPUT2 CP-65 PC BOARDS MAINBOARD Class - 10 CP-65 N/A CP-65 TESTING PROCEDURES Class - 14 START - UP CP-65 N/A CP-65 DIAGRAMS B

4、2BXR00 Class - 16 CP-65 CP65_block.sch-1 - Thu Jun 20 11:11:21 2002 B2B7XR03_amp.sch-1 - Thu Jun 20 11:00:56 2002 B2B7XR03_amp.sch-2 - Thu Jun 20 11:01:28 2002 B2B6XR00_IR_input.sch-1 - Thu Jun 20 10:59:40 2002 B2B5XR01_Encoder.sch-1 - Thu Jun 20 10:59:01 2002 B2B4XR01_display_5_button.sch-2 - Thu J

5、un 20 11:07:05 2002 B2B4XR01_display_5_button.sch-1 - Thu Jun 20 11:08:57 2002 B2b2XR00_line input2.sch-1 - Thu Jun 20 10:56:01 2002 B2B1XR02_mother_PCB_with cs3310.sch-1 - Thu Jun 20 10:51:01 2002 B2B1XR02_mother_PCB_with cs3310.sch-2 - Thu Jun 20 10:51:38 2002 B2B1XR02_mother_PCB_with cs3310.sch-3

6、 - Thu Jun 20 10:53:20 2002 B2B1XR02_mother_PCB_with cs3310.sch-4 - Thu Jun 20 10:54:28 2002 B2B1XR02_mother_PCB_with cs3310.sch-5 - Thu Jun 20 10:55:06 2002 B2B8XR02_ext ps.sch-1 - Thu Jun 20 11:13:08 2002 Class CP-65 Software Upgrade This document details the steps to upgrade your CP-65 Preamplifi

7、er from software revision 65-102A47 to CS103B02. This new release solves the random problem of the unit becoming unstable when using the unity gain option. Warning ! Before starting this procedure make sure the unit is shut off and unplugged from the main A.C. line. Section 1.0 Removing Main Unit Co

8、ver To remove the cover of the CP-65 main unit simply remove the 8 medium sized Philips screws and lift off the top cover. Section 2.0 Replacing the Firmware IC We have supplied 2 schematic diagrams, Figures 1 and 2, to help you locate the integrated circuit (IC) that needs to be replaced. Figure 1

9、shows you the complete layout of the main unit and a highlighted area in which the firmware IC (U503) is located. U503 is located in the center of figure 2 and above C340 and C317 when looking at the unit with the front panel facing you. The IC is a dual inline package with 28 pins and is placed on

10、the main board with the notch towards the rear panel. Remove U503 with the supplied chip puller and replace it with the new IC labeled CS103B02. Make sure you place the new IC with its notch facing the rear of the unit. Incorrect placement will of U503 will cause your CP-65 not to turn on. Once you

11、have replaced the IC you should power up the unit to ensure proper placement and seating. When you have verified proper power up of the unit you can then shut down the unit and replace the top cover. We have supplied you with 8 new top cover screws to replace any damaged or marked during this proced

12、ure. CP-65 Power Supply 1. Visual check: - check the silkscreen of the chassis - check scratches - check for all screws, washers, lock washers, PEM nuts - check for the polarities of the caps, diodes, missing components, solder bridges, cold solders, and quality of the PCB - check for the correct fu

13、se: F6- .5A F5- 6DC 2A F1-F4- 1A 2. Electrical Test: 1. Short pin 1&3 of connector U3 in order to switch the unit 2. Plug the unit. Crank variac to 60 vac. Check the polarities 3. Crank unit to 120 vac full blast. Measure all voltages as follows: a) Q8- IN-18 VDC OUT-14 VDC R13-13 VDC b) D1-12 VDC c

14、) Q1- IN- 27.8 VDC OUT- 18 VDC d) Q2- IN- -27.8 VDC OUT- -18 VDC e) Q3- IN- 27.8 VDC OUT- 18 VDC f) Q4- IN- -27.8 VDC OUT- -18 VDC g) V3- PIN#1- 13 VDC PIN#3- 4.5 VDC (w/ wad) h) V4- PIN#3- -18 VDC PIN#1- 18 VDC i) V6- PIN#3- -18 VDC PIN#1- 18 VDC j) V8- PIN#3- -18 VDC PIN#1- 18 VDC k) V7- PIN#3- -1

15、8 VDC PIN#1- 18 VDC 4. Set- up for Japan (100 VAC only) 1. remove R6, R9, Q7, Q8 (transistor leave it to the PCB 2. cut the pins of Q8 on the board and short pins 2 & 3 3. measure electrical voltage as follows a) at 95 Vac D1- 10.5 VDC R6- 11.9 VDC b) at 100 Vac D1- 11.25 VDC R6- 12.7 VDC CP-65 Moth

16、er PCB 1. Visual Inspection 1. check for the polarities of the caps, ICs, transistor sockets, connectors, relays, and diodes. 2. check for the pads of Q 305 and 306 3. check for missing parts, wrong components, cold solders, solder bridges, solder splashes, and quality of the PCB 4. PCBs must be cle

17、aned very well 5. check balance lock if working smoothly and the same appearance 2. Electrical Test: Plug the unit and measure as follows: 1) U1- PIN#1- 18 VDC PIN#3 18 VDC 2) U2- PIN#1- 18 VDC PIN#3 18 VDC 3) Relays control power must be 5 VDC 4) Q301- T1- 18 VDC T2- 15 VDC 5) Q302- T3- -18 VDC T4-

18、 -15 VDC 6) Q 303- T5- 18 VDC T6 15 VDC 7) Q304- T7- -18 VDC T8- -15 VDC 8) Q305- IN- 13.3 VDC OUT- 7.0 VDC 9) Check Signal CP-65 Plug-In Board 1. Visual Inspection 1. check for the polarities of the caps, transistors, sockets and trimpots 2. check for the missing parts, wrong components, cold solde

19、rs, solder bridges, solder splashes and quality of the PCB 3. check for the modification of the PCB see sample. 2. Electrical Test Plug in the unit. Measure and adjust voltages as follows: 1. TP1, TP2, TP12, TP11- 200 mv - adjust trimpot Rv103 for TP1 trimpot Rv102 for TP2 trimpot Rv203 for TP12 tri

20、mpot Rv202 for TP11 R113, R102, R213, R 202 respectively 2.BIAS- 25mv -adjust trimpot Rv101 across resistors R123 & R124, Rv201 across R223 and R224 3.Offset- 0 mv -adjust to 0 mv offset on Rv103 and Rv 102, Rv 203 and Rv 202 respectively with respect to GND 4.a) Positive Supply TP3, Tp10- 1.1 Vdc b

21、) Negative Supply TP4, TP9- 1.1 Vdc c) Positive Supply TP5, TP8- .5 Vdc d) Negative Supply- .5 Vdc CP-65 Panel and Display 1. Visual Inspection: - check for the quality of the PCB - check for the orientation of the sockets, xsistor, polarities, missing components, solder bridges, cold solder, wrong

22、components - check the direction of the lightbars of display - check also the lightbars if they are soldered flat to the PCB 3. Functions: 1. install microchip 2. plug-in unit 3. led of power supply lights green 4. hear relay clicks and led turns red 5. see Classe CP 65* on display 6. hear relay cli

23、cks and unit goes to standby - green led lights 7. press all the switch buttons one by one and check if switches are good and corresponds to the selected inputs on display. 8. check volume control if it is working well 9. check all the function in remote control including the programs such as the di

24、splay. Off, Unity Gain, and Reset 10. check the vol. On R.C. close and far to the unit 11. check signal 12. Reset the unit CP-65 Final Testing 1. Visual Inspection - check the silkscreen of the chassis - check scratches - check for all screws, washers, nuts, Pemnuts. Screws must be tight - check bal

25、ance lock if working smoothly - check input/output PCBs. Left is for Left, right is for Right. Left PCB- R6, R7 33 Right PCB- R1, R2- 33 2. Electrical Test 1) check the polarities of the dc cable 2) plug-in the unit. Test and measure voltages both main and phono Dc supply of the power supply. 3) Ref

26、er to Cp-65 Mother PCB Part 2 Electrical Test Procedure how to measure the supply voltage of the mother PCB. 4) Readjust the bias. Offset and 200 mv on the plug-in board. Refer to Part 2 of CP-65 Plug In Board Procedure 3. Display Test and Functions - refer to Cp-65 Panel and Display Procedure 4. Si

27、gnal Test 1) Feed input signal 1 KHZ sinewave into input 1. Connect output to the oscilloscope. Turn the volume up and down. Should see both outputs. Check for noise and distortion 2) Check the unity gain of Line 1 3) Check the IR in and IR out 4) Check the 12v. trigger 5) Check balance left and rig

28、ht 6) Check mute on and off 7) Reset unit 8) Check back the Line 1 output. Should see output on output 1 and 2, output 1, output 2, both on balance and single ended outputs but using the remote control 9) Check the phase 10) Repeat steps 1,2,8,9, for inputs 2,3, Tape 1, Tape 2, single ended and bala

29、nce inputs 11) Check bal. Outputs: the inverted signal should be the same level with non-inverted signal, and should be 180 out of phase with non inverted signal 12) Test output signals at 20 Hz, 100 Hz, 1KHz, 10 KHz, 20 KHZ and 30 KHz square-wave. Look for noise and distortion 5. Noise Test 1) conn

30、ect balanced outputs to a power amplifier. Select line. Turn the volume up and down manually and listen for the noise and hum with speaker. Do the same thing in balance, Tape1 and 2 2) repeat step 1 with single ended outputs 3) repeat steps 1 and 2 with remote control 6. Paper Works 1) turn volume u

31、p to 15. measure and record the offset voltages. 2) Measure and record bias voltages 3) Measure and record the difference in right and left channels. (in dB) 4) Measure and record the gain (in dB) 7. Audio- Precision Test 1) set-up unit to the computer. Volume must be 30 2) load frequency response test and sweep 3) load THD plus N- Freq. Response test 4) and B must be 0.003% 5) measure noise in dB 8. 1) check the RS232 port 2) reset the unit 3) mark F.T.