Sony-CDPC235-cd-sup 维修电路原理图.pdf

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1、CDPC235 Subject 2 BD BOARDS USED, ONLY 1 PART # LISTED IN MANUAL SYMPTOMS Only one (1) board listed. This board comes with 8-752-360-75 IC used with KSS-390 optical pickup. No board listed that comes with 8-752-351-94 IC used with the KSS-240A optical pickup.Please advise if we have to change the IC

2、 or if another part # is available. RESOLUTION 4/29/94; As per KCP the part number for the board using the KSS-240A pickup is A4649433A, this number is registered with KCP. A4649610A 157 BD BOARD CDPC235 Subject AFTER PLAYING A FEW SELECTIONS STARTS SKIPPING - REPL OPTICS SYMPTOMS After playing a fe

3、w selections, the unit starts skipping. RESOLUTION Replaced optical device. 884828111 151 KSS390A CDPC235 Subject AFTER WARM UP, DISPLAY BLINKS AND STOP PLAYING SYMPTOMS RadioFans.CN 收音机爱 好者资料库After unit warmed up, display blinks and stop playing during track change and look for another disc. After

4、intensive trouble shooting, we found a defective diode in positive 9.5V supply. If 9.5V supply drops to below 6.8V, unit will reset. We think, diode is not big enough to handle heavy loads. RESOLUTION We recieved Sutos information that samples are on the way. We will wait for the samples and look in

5、to this situation at that time. Update 9/21/94: The Samples have not yet arrived, since this is the only report of this type of problem regarding the CPDC235 we will close this issue, We will however, watch for further reports. 871920082 D201 B21/DIODE 11ES2 CDPC235 Subject BU UNIT HITS DISC TABLE W

6、HEN CHUCKING SYMPTOMS On 2 different units the laser hits the disc table when chucking. It appears disc table, ref# 59, is stopping too far clockwise. The pin on ref# 123 is against the left side of the slot in ref# 59. Is there any adjustment? What makes the table stop in this particular place? RES

7、OLUTION (Feb 5) Replacing R458 with a 3K, 1/6 W (P/N 124784200) and R457 with a 5.6k, 1/6 W (P/N 12784900) repaired a unit sent to Tech. department. R459 is a 2.1k and was already installed on the unit worked on at Tech Dept. Positive feedback from Boston and Atlanta. -UPDATE: From Tokyo: 4/11, Repl

8、ace IC401 with p/n 875284942, verify R457 - 2.4 k ohm, R458 - 750 ohm, R459 - 1.2k ohm resistor p/ns listed in S/M. CDPC235 Subject DEAD UNIT - POWER TRANFORMER OPENED SYMPTOMS RadioFans.CN 收音机爱 好者资料库Checked and found open primary (thermal fuse) in power transformer. Noticed that Q504 and Q502 had o

9、verdissipated. Checked both transistors and found shorted collector/emitters on both. Replaced Q502, Q503 and Q504. Then found that IC501 pins 13 and 19 were at -1vdc and +1vdc. RESOLUTION Replaced power transformer Q502, Q503, Q504 and IC501. Normal operation restored. 142355311 T901 POWER TRANSFOR

10、MER CDPC235 Subject DISC TRAY, ROTATES CONTINUOUSLY (REPLACE D801) SYMPTOMS At power on disc tray would spin and not stop. Other functions were normal (open/close). RESOLUTION By checking D801 connector main board, voltages were correct but, pin 5 (T. Sens) data looked bad. Replaced D801, solved pro

11、blem. The purpose of D801 is to sense the location of the disc tray by detecting the slots in the tray and outputting pulses to the micro IC401 (pin 6). 874992418 D801 J8/IC RPI 1391 CDPC235, CDPC335Subject INTERMITTANT AUDIO - REPLACED BD TO MAIN BD FLEX CABLE SYMPTOMS Right or left channel intermi

12、ttently cutting out. RESOLUTION Replaced flex cable from BD board to main board. 164840911 122 FLEX CABLE CDPC235, CDPC335Subject JAMS DISC TABLE, WONT PLAY DISCS - REPLACE GEAR 61 AND 66 SYMPTOMS Unit will not play discs. BU assembly wont come up, due to interference with disc table. Occasionally,

13、the CLV motor pulley is damaged. RESOLUTION To repair this problem as per Tokyo: Replace IC 401 with P/N 8-752-849-42, also verify values of R457 (2.4 ohm) R458 (750 ohm) and R459 (1.2k ohm). The P/Ns of the resistors are listed in the S/M. A Service Bulletin is in the process of being issued to com

14、pletely list part numbers and serial number ranges. X49433791 61 GEAR, ROTARY A, ASSY CDPC235, CDPC335Subject MECHANICAL ALIGNMENT PROCEDURE AVAILABLE, SEE S/M SUPP. #2 SYMPTOMS The unit had no mechanical movement. I found the above part out of item number 119 slot (down position on both units). RES

15、OLUTION I reinstalled item number 123 into the slot on number 119 and the unit restored operation. Is there any written alignment procedure for this new mechanism? We have asked Tokyo to provide the alignment procedure. -UPDATE: Please refer to service manual supplement #1 for the mechanical alignme

16、nt procedure. 495728901 123 BU-5BD (BASE UNIT) CDPC235 Subject NO AUDIO - REPLACED OPTICAL DEVICE AND CABLES 122 AND 153 SYMPTOMS Unit had no audio traced problem to defective cables, than unit was skipping. Found defective optics. RESOLUTION Replaced cables 122 and 153 and optical device. 884828111

17、 151 KSS390A CDPC235 Subject STATIC IN AUDIO OUT - REPLACED IC501 SYMPTOMS Static in audio, traced signal to IC501 sound was good going into the IC but bad going out. RESOLUTION Replace IC501. 875917588 IC501 D19/LINE AMP/MUTING ATT CDPC235 Subject TABLE KEEPS ROTATING WITH LESS THAN 3 DISCS SYMPTOM

18、S With less than 3 discs in unit the table will continue to rotate unless you put some pressure on the turntable to slow it down. With 3 discs it will detect the discs and play them. With 1-2 discs it will not detect the discs and play unless you put slight pressure on the side of the turntable. RES

19、OLUTION Try replacing the resistors as outlined in FPR P0144, this mod will slightly slow the rotation of the disc table. As per our conversation, this resistor mod solved the problem. CDPC235 Subject WEAK RIGHT CHANNEL - REPLACED LINE AMP IC501 SYMPTOMS Right channel is weak. RESOLUTION Replaced li

20、ne amp IC; normal operation restored. The line amp supplies L and R audio signals to the line out jacks and the headphone amp (IC551) the same symptom, low right audio, will be noticable through both outputs. 875906166 IC501 D19/LINE AMP CDPC235, CDPC435, CDPC535Subject TRAY MOTOR SPINNING BACKWARDS

21、 - REPLACE TABLE MOTOR SYMPTOMS Ran into this problem 5 times in past 3 weeks. Removed tray motor. Old motor is installed with lable on motor facing up. If new motor is installed with label facing up, motor will spin backwards and tray will not function properly. RESOLUTION When replacing this motor

22、, I installed it with label facing down so it spins the correct way. Replaced motor because of tray hitting the BU mech. Tried resistor mod but it did not work. If the mod doesnt work, tray motor will usually fix the problem. A4660322A M801 DISC TABLE MOTOR CDPC235 Subject WONT READ COMPLETE DISC -

23、RESOLDERED IC101 SYMPTOMS Unit would not read a full disc. RESOLUTION Resoldered IC101 of CD board. 875235194 IC101 J13/CXD2515Q CDPC235, CDPC245, CDPC335, CDPC435, CDPC445, CDPC545, CDPCA7ESSubject TRAY MOTOR NOT LABELED OR WIRED CORRECTLY SYMPTOMS After replacing the tray motor with a new one the

24、player would not work correctly, the tray would rotate back and forth and not recognize the cd in the unit. RESOLUTION Checking the old motor found, it mounted in the unit with the lable facing up and the positive terminal on the left, this turns counterclockwise. I installed the new motor the same

25、way and it did not work. The new motor installed with label down worked correctly. I checked the samples sent to the Tech dept. Youre correct the new motor does spin in the opposite direction of the original motor. I have notified KC parts to check stock and take corrective action. A4660322A M801 TR

26、AY TABLE MOTOR CDPC235, CDPC265, CDPC335, CDPC365, CDPC445, CDPC545, CDPC745, CDPCA7ES, CDPCA8ES, CDPCA9ESSubject WHISTLING NOISE - ADD RTV BTWN SPINDLE MOTOR & BD BOARD SYMPTOMS A whistling noise (about 400HZ) manifests itself on certain cuts of disc (Goodbye Yellow Brick Road, Elton John, Polydor

27、D103076). If you touch the optical block lightly, the noise disappears. RESOLUTION Remove the spindle motor from the BD board. Add a layer of silicone sealer (RTV) between the spindle motor and BD Board. Re-install the spindle motor, take care not to allow the base of the spindle motor to contact, o

28、r directly lay on the BD board during reassembly. Adding the RTV silicone compound between the motor and BD board isolates the two parts. There is no vibration transfer from the motor and spinning disc, therefore, the whistling noise stops. 732206519 RTV SILICONE COMPOUND CDPC435 Subject ALTERNATIVE

29、 METHOD TO REPAIRING CHASSIS VS REPLACING SYMPTOMS Found plastic rod coming out of chassis, as shown on pg 35 of SM, can be repaired. Purpose of rod is to push on the rack release and release rack. If plastic rod breaks, disc exchange doesnt work properly. Method used is to drill a hole where the ro

30、d was all the way through, then insert a screw from under unit so threads are showing in place where rod was. Screw to proper height and lock screw head. Now screw is doing job of plastic post. Part for screw 768566014. RESOLUTION We continue to investigate this issue 495728501 111 LEVER, SET CDPC43

31、5 Subject BU ASSY CONTACT TRAY SB HFP0389 UPDATE - REPL TABLE MOTOR SYMPTOMS Had problem as stated in HFP0359 and put correct value resistors and replaced microprocessor with no re RESOLUTION of the problem. -SOLUTION: Replaced table motor, problem resolved. A4660322A M801 TABLE MOTOR CDPC435 Subjec

32、t DRAWER WILL NOT OPEN - RESOLDERED MOTOR TERMINAL SYMPTOMS Drawer will not open motor does not run for open/close RESOLUTION Resoldered motor, one terminal was poorly soldered from the factory (intermittent contact). Resoldering restored normal operation. A4608834A M802 MOTOR ASSY LOADING CDPC435 S

33、ubject INTERMITTENTLY READING DISC - FLEX CABLE INTERMITTANT SYMPTOMS The unit would start to play fine than audio would distort and spindle goes high speed. RESOLUTION Replaced flex cable from main PCB to BD board unit works. Although the flex connector may be perceived as a weak point there has be

34、en little parts movement of this piece in reference to the CDPC435. 175112311 122 FLEX CABLE CDPC435 Subject MECH NOISE WHEN OPEN, NO PLAY SYMPTOMS Unit has mech noise when open drawer or no play. Inspection under disc table found chassis part holding lever set broken, lever set loose inside unit. R

35、ESOLUTION The solution is to replaced chassis, part not supplied. We will notify KCP about stocking this chassis. 495728501 111 LEVER SET CDPC435 Subject SERVICE MANUAL CORRECTION - U/D GEAR P/N CORRECTION SYMPTOMS The Service Manual for CDP-C435/C535 is incorrectly printed. The part number for U/D

36、Gear (Ref# 119) shown as 4-957-286-04. RESOLUTION Correct Part number is 4-957-286-01. 495728601 119 GEAR (U/D) CDPC435 Subject UNIT HAD POWER BUT WAS INOPERATIVE - CN801 MAKNG BAD CONTACT SYMPTOMS Unit had power but was inoperative. RESOLUTION Connector CN801 from sensor board was not making a good

37、 connection on table motor board. CDPC435 Subject WIRING HARNESS TO ROTARY ENCODER NOT SEATED PROPERLY SYMPTOMS Player exhibited symptoms similar to either flex cable or control problems. Door opening and closing by itself, B.U. assembly would go up or down or do nothing. It did not know where it wa

38、s. RESOLUTION Disassembled unit to look at rotary encoder. Found S3 wire going to rotary encoder from main board not fully seated into socket of encoder. Pressed wire firmly into socket. Unit restored to normal operation. CDPC535 Subject NO FUNCTION AFTER WARMUP, DISPLAY FLASHES OFF - REPL D601 SYMP

39、TOMS Unit plays ok, then after warmup, display flashes off and cycles. System control is getting reset from supply as it goes down then recovers. It starts this cycling when play is pressed and disc spins up. RESOLUTION Traced power supply weakness to intermittent open diode of bridge. (60hz ripple

40、on pos supply side rather than 120hz) shunted with known good diode, worked fine. 871920082 D601 C21/DIODE 1IES2 Model:CDP-C235, CDP-C335, CDP-C435, CDP-C535No.365R1Subject:Part Number Missing - Reference No. -, MainChassisDate:May 15, 1996Symptom:(*)The part number for Ref # -, Main Chassis, which

41、is shown on page 23 of the ServiceManual, is not listed in the parts list.Solution:Please add the following part number to the Service Manual.REFDESCRIPTIONPART NUMBER-MAIN CHASSIS4-957-300-03CSA-13Reference: S/B update of CSA-13 HiFi #365PRINTED IN USAPRINTED ON RECYCLED PAPERSony Service CompanyNa

42、tional Technical ServicesA Division of Sony Electronics Inc.Park Ridge, New Jersey 07656CONFIDENTIALService BulletinHi-Fi ProductsModel:CDP-C235, CDP-C335, CDP-C435, CDP-C535No.490Subject:Substitution for KSS-390ADate:June 14, 1996Symptom:(*)The Optical Block KSS-390A is no longer available and KSS-

43、240A is supplied as thesubstitution. As the two parts have some electrical and mechanical differences,please perform the following changes according to the model being serviced.Solution:For CDP-C235/335: 1. Check the value of R421. If it is 8.2K or less, leave it in circuit. Otherwise,remove it and

44、replace it with a jumper wire. 2. Confirm the existence of R423. If it is mounted, remove it. This is needed to keeppin 28 of IC401 High when operating CD function. 3. Replace the flat wire which connects the BD Board and Optical Block with thenew type listed below.For CDP-C435/535:Just replace the

45、flat cable with the new type. No circuit modificationsneeded.DescriptionPart NumberNoteFlat Cable1-575-001-11This cable must be used with KSS-240ACSA-13Reference: T/N # AU-96011 & 12 May 20, 96PRINTED IN USAPRINTED ON RECYCLED PAPERSony Service CompanyNational Technical ServicesA Division of Sony Electronics Inc.Park Ridge, New Jersey 07656CONFIDENTIALService BulletinHi-Fi Products