Classe-CP35-pre-sm维修电路原理图.pdf

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1、CP-35 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-35 MECHANICAL ASSEMBLY Class - 25 1 MS-2347 PHILIPS 2 L103XR03 3 L104XR02 CP-35 FACE PLATE ASSEMBLY Class - 1 MODEL CP-35 SELECTOR R

2、EG1REG2REG3 TAPEMUTE BAL1REG4 3 1 2 FACE PLATE ASSEMBLY 1 2 3 4 5 L156XR01-S 6 Class - 2 CP-35 4 5 6 12 3 TOP VIEW SIDE VIEW 1 SIDE VIEW 2 CHASSIS REAR VIEW 1 2 3 4 5 6 7 8 9 10 10 9 7 8 3 4 Class - 3 5 6 CP-35 1 2 CHASSIS 1 PLA CAPFR1 2 HDW #8 FLAT WASHER 3 BZO 8-32x3/4” BHCS 4 L101XR04 Class - 6 C

3、P-35 1 2 3 4 TOP VIEW Class - 8 PARTIAL ASSY 1 AVR BO51XR02 2 AVR BO50XR03 3 AVR BO1CXR00 4 TRANSFORMER CP-35 TOP VIEW Class - 8 PHONO BOARD INSTALLATION 1 2 CP-35 SIDE VIEW 1 2 SHIPPING AREA - FINAL ASSY 1 L102XR00 2 Class - 9 MODEL CP-35 7805 CD3 = +12V CD4 = +5V Q2 = 7818 C9 = +26V C11 = +18V Q3

4、= 7918 C10 = -26V C12 = -18V Q4 = 7815 C20 = -18V C22 = -15V Q5 = 7915 C20 = -18V C22 = -15V Q9 = 7905 C42 = -12V C44 = -15V Q8 = 7805 C43 = +5V C41 = +12V Q7 = 7912 C28 = -18V C30 = -12V Q6 = 7812 C27 = +18V C29 = +12V Tip 107 = Q102, Q202, Q302, Q402 C110, C210, C310, C40 = -18V Tip 102 = Q101, Q1

5、02, Q201, Q301, Q401 C108, C208, C308, C408 +18V 1C2 = OPA2134 C35 = +12V C36 = -12V 1C1 = OPA2134 C33 = +12V C34 = -12V 1C3 = OPA2134 C37 = +12V C38 = -12V 1C101 = OPA2134 C104 = +15V C106 = -15V 1C301 = OPA2134 C304 = +15V C306 = -15V Q103, Q203, Q303, Q403 = TL431 Measure across capacitors: C103,

6、 C203, C303, C403 = 2.5V Bias voltages = 150mV to 200 mV Measure across resistors R108, R107, R207, R208, R308, R307, R407, R408 Offset = 10mV (+) or (-) maximum measure W/Respect to GND. T.P. lower pins on R109, R209, R309, R409 Offset on tape out = maximum (+)(-) 10mV Check signals CP-35 CP-35 FIN

7、AL TEST Class - 15 1. Before final test unit was 4 days on burn-in-bench with music. 2. Take the unit from burn-in-bench to Q.C and play it immediately. Keep the line 120V A.C. 3. Check physically and check the components. -check all capacitor and devices direction. Capacitor stand up right way i.e.

8、 check co- solder. -check any missing parts. -check all fuse sockets. -check main board tight up with screw and washer. -check any screw missing. -check balance lock working smoothly. -check all output transistors position with pad. -check main transistors position with pad. -check main transformer

9、tight very well. 4. Adjust bias 26mV for every output devices for both channels. Wait 7 to 8 minutes after each adjustment. Also adjust offset to 0mV. 5. Measure rail and pre-driver voltage. 6. Measure A.C voltage for bridge. 7. Measure supply voltage for relays. +15V and 15V for both channels. +12V

10、 and 12V. 8. Measure reference voltage 8.1V on both channels. 9. Measure reference voltage for protection 78V. 10. After setting the bias, connect load and input signal. Check output signal. Check phase with input signal. 11. Measure frequency response, slew rate, gain, signal to noise ratio. 12. Ch

11、eck the output signal from 20Hz to 20KH with load in following combination. Also measure the output power. Regegur-stereo Balance-stereo Regegur-mono Balance-mono 13. Check phone-jack. 14. Check protection on both channels. 15. Check noise with speaker. 16. Put the jumpers and varistor for required

12、A.C voltage. 17. Plug unit again and check rail and pre-driver voltage. CP-35 DIAGRAMS Class - 25 MAINBOARD - B101XR02 (1) Class - 16 CP-35 Class - 17 CP-35 MAINBOARD - B101XR02 (2) Class - 18 CP-35 MAINBOARD PREAMP (LEFT) - B101XR02 (3) Class - 19 CP-35 MAINBOARD PREAMP (RIGHT) - B101XR02 (4) Class

13、 - 20 CP-35 PANEL - B103XR01 CP-35 Block Diagram Single-ended Input Selector Balanced InputBalanced Selector Input Balanced To Single-end Conversion Input Selector Volume Control + - + - Pre-out Gain Stage CP35 MAIN BOARD (B101XR03) 1. INSPECTION a) Visually check all parts for: solder bridges or sp

14、lashes, backwards, missing components and component orientation. 2. Power supply voltages a) Apply 30 VAC & check polarities b) Apply 60 VAC check voltages c) Apply 120 VAC 1. Q17805 CD3 +12V CD4 +5V 2. Q2 7818 C9 +26V C11 +18V 3. Q3 7918 C10 -26V C12 -18V 4. Q4 7815 C20 -18V C22 -15V 5. Q5 7915 C20

15、 -18V C22 -15V 6. Q9 7905 C42 -12V C44 -15V 7. Q8 7805 C43 +5V C41 +12V 8. Q7 7912 C28 -18V C30 -12V 9. Q6 7812 C27 +18V C29 +12V 10. Tip 107 Q102, Q202, Q302, Q402 a) C110, C210, C310, C40 -18V 11. Tip 102 Q101, Q102, Q201, Q301, Q401 a) C108, C208, C308, C408 +18V 12. 1C2 OPA2134 C35 +12V C36 -12V

16、 13. 1C1 OPA2134 C33 +12V C34 -12V 14. 1C3 OPA2134 C37 +12V C38 -12V 15. 1C101 OPA2134 C104 +15V C106 -15V 16. 1C301 OPA2134 C304 +15V C306 -15V 17. Q103, Q203, Q303, Q403 TL431 Measure across capacitors: a) C103, C203, C303, C403 2.5V 18. Bias voltages 150MV to 200 MV Measure across resistors a) R1

17、08, R107, R207, R208, R308, R307, R407, R408 19. Offset 10MV (+) or (-) maximum measure W/Respect to GND. T.P. lower pins on R109, R209, R309, R409 20. Offset on tape out maximum (+)(-) 10MV 21. Check signals CP-35 Display (B103XR02) 1. INSPECTION a) Visually check all parts for: solder bridges or s

18、plashes, backwards or missing parts and component orientation. b) Sockets on light bars must be 3 layers. c) C3, R1, C18 are empty. d) Check double side tape on the bottom of the socket. 2. FUNCTIONS a) Install micro chip CAP100 XC on U1 (install all red LED) b) Plug on the unit. c) Countdown from 2

19、0.0 to 0.00 relay clicks. d) REG1 LED lights. e) Press switch up and down one at a time. All LEDs must light one at a time. Relay clicks every time you press selector switch. f) Press tape switch relay clicks, LED lights. g) Press mute, no click. h) Check volume manually. i) Check remote control mod

20、el 10 if all functions are working. Adjusting CP-35 Gain to Unity 1- Disconnect unit from the AC line and from the system 2- Remove the top cover 3- Locate and remove resistors R202 and R402 4- Locate and replace resistors R103 and R303 from the old value (86.6 Kohms) to the new value of 21.5 Kohms 5- Replace the top cover and test unit.