Classe-CP35-pre-sm维修电路原理图.pdf

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1、CP-35ClassPREAMPLIFIERSERVICE MANUALv 1.0RadioFans.CN 收音机爱 好者资料库IndexMechanical Assembly3PC Boards17Testing Procedures30Diagrams33RadioFans.CN 收音机爱 好者资料库CP-35MECHANICALASSEMBLYClass - 251 MS-2347 PHILIPS2 L103XR033 L104XR02CP-35FACE PLATE ASSEMBLYClass - 1MODEL CP-35SELECTORREG1REG2REG3TAPEMUTEBAL1R

2、EG4312FACE PLATE ASSEMBLY1 2 3 4 5 L156XR01-S6 Class - 2CP-35456123TOP VIEWSIDE VIEW 1SIDE VIEW 2CHASSIS REAR VIEW1 2 3 4 5 6 7 8 9 10 10 9 7 834Class - 356CP-3512CHASSIS1 PLA CAPFR12 HDW #8 FLAT WASHER3 BZO 8-32x3/4” BHCS4 L101XR04Class - 6CP-351234TOP VIEWClass - 8PARTIAL ASSY1 AVR BO51XR022 AVR B

3、O50XR033 AVR BO1CXR004 TRANSFORMERCP-35TOP VIEWClass - 8PHONO BOARD INSTALLATION1 2 CP-35SIDE VIEW12SHIPPING AREA - FINAL ASSY1 L102XR002 Class - 9MODEL CP-35 7805CD3 = +12VCD4 = +5VQ2 = 7818C9 = +26VC11 = +18VQ3 = 7918C10 = -26VC12 = -18VQ4 = 7815C20 = -18VC22 = -15VQ5 = 7915C20 = -18VC22 = -15VQ9

4、= 7905C42 = -12VC44 = -15VQ8 = 7805C43 = +5VC41 = +12VQ7 = 7912C28 = -18VC30 = -12VQ6 = 7812C27 = +18VC29 = +12V Tip 107 = Q102, Q202, Q302, Q402C110, C210, C310, C40 = -18V Tip 102 = Q101, Q102, Q201, Q301, Q401C108, C208, C308, C408 +18V 1C2 = OPA2134 C35 = +12V C36 = -12V 1C1 = OPA2134 C33 = +12V

5、 C34 = -12V 1C3 = OPA2134 C37 = +12V C38 = -12V 1C101 = OPA2134 C104 = +15V C106 = -15V 1C301 = OPA2134 C304 = +15V C306 = -15V Q103, Q203, Q303, Q403 = TL431Measure across capacitors:C103, C203, C303, C403 = 2.5VBias voltages = 150mV to 200 mV Measure across resistorsR108, R107, R207, R208, R308, R

6、307, R407, R408Offset = 10mV (+) or (-) maximum measure W/Respect to GND. T.P. lower pins on R109, R209, R309, R409Offset on tape out = maximum (+)(-) 10mV Check signalsCP-35CP-35FINAL TESTClass - 151. Before final test unit was 4 days on burn-in-bench with music.2. Take the unit from burn-in-bench

7、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. check co-solder.-check any missing parts.-check all fuse sockets.-check main board tight up with screw and washer.-check a

8、ny screw missing.-check balance lock working smoothly.-check all output transistors position with pad.-check main transistors position with pad.-check main transformer tight very well.4. Adjust bias 26mV for every output devices for both channels. Wait 7 to 8 minutes after each adjustment. Also adju

9、st 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 and 12V.8. Measure reference voltage 8.1V on both channels.9. Measure reference voltage for protection 78V.10. After setting the bias,

10、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. Check the output signal from 20Hz to 20KH with load in following combination. Also measure the output power.Regegur-stereoBalance-stereoRegegur

11、-monoBalance-mono13. Check phone-jack.14. Check protection on both channels.15. Check noise with speaker.16. Put the jumpers and varistor for required A.C voltage.17. Plug unit again and check rail and pre-driver voltage.CP-35DIAGRAMSClass - 25MAINBOARD - B101XR02 (1)Class - 16CP-35Class - 17CP-35MA

12、INBOARD - B101XR02 (2)Class - 18CP-35MAINBOARD PREAMP (LEFT) - B101XR02 (3)Class - 19CP-35MAINBOARD PREAMP (RIGHT) - B101XR02 (4)Class - 20CP-35PANEL - B103XR01CP-35 Block DiagramSingle-ended InputSelectorBalanced InputBalancedSelectorInputBalancedToSingle-endConversionInputSelectorVolumeControl+-+-

13、Pre-outGain StageCP35 MAIN BOARD (B101XR03) 1. INSPECTION a) Visually check all parts for: solder bridges or splashes, 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 +1

14、2V 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 -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

15、 -18V 11. Tip 102 Q101, Q102, Q201, Q301, Q401 a) C108, C208, C308, C408 +18V 12. 1C2 OPA2134 C35 +12V C36 -12V 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 acr

16、oss capacitors: a) C103, C203, C303, C403 2.5V 18. Bias voltages 150MV to 200 MV Measure across resistors a) R108, 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 (+)(-) 10M

17、V 21. Check signals CP-35 Display (B103XR02) 1. INSPECTION a) Visually check all parts for: solder bridges or splashes, 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.

18、 FUNCTIONS a) Install micro chip CAP100 XC on U1 (install all red LED) b) Plug on the unit. c) Countdown from 20.0 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

19、switch relay clicks, LED lights. g) Press mute, no click. h) Check volume manually. i) Check remote control model 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.