HHB-CDR830-cdr-sm 电路图维修手册.pdf

《HHB-CDR830-cdr-sm 电路图维修手册.pdf》由会员分享，可在线阅读，更多相关《HHB-CDR830-cdr-sm 电路图维修手册.pdf（90页珍藏版）》请在收音机爱好者资料库上搜索。

1、MONITOR DIGITAL REC LEVEL ANALOG REC LEVEL INPUT SELECTOR AUTO MANUAL TITLE/MODE MENU/ DELETE TRACK NO. WRITE DISPLAY FINALIZEERASE SCROLLTEXT SYNCHRO CD TEXT PROFESSIONAL CDR-830 FOR U.S. MODELS NECESSARY INFORMATION FOR DHHS RULES MARKED ON THE REAR BASE AND ON THE TOP OF CD MECHANISM AS BELOW. DA

2、NGER LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). Type Model Power RequirementRemarks CDR-830 KUXJ/CAAC120V WYXJAC220-240V RadioFans.CN 收音机爱 好者资料库 2 CDR-830 1. SAFETY INFORMATION This service manual is intended for qualifi

3、ed service technicians ; it is not meant for the casual do-it- yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect t

4、he safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain

5、 electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health R Over Drive : A value + 0.1mW 0.01 mW Pickup objective lens Optimizing CD-R recording power of laser diode. Incapable of CD-R recording, self-pre recorded

6、 CD-R disc playback. Sound pauses, track jumping, or bad RF wave shape (though no failure in playing CD). Test Point Adjustment Value Purpose Symptom when Out of Adjustment Adjustment methodFL Indication DANGER LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. DANGER LASER RADIATION WHEN OPE

7、N. AVOID DIRECT EXPOSURE TO BEAM. 54 CDR-830 Procedure 1. Enter the Test mode. 2. Press the INPUT SELECTOR key so that ANALOG appears on the FL display. 3. Press the ERASE key so that CD-RW appears on the FL display. 4. Move the pickup to the position where the power is easy to measure by pressing t

8、he SCAN key. ( 1? ) 5. Press the RECORD and REC MUTE key in order, and light the LD. 6. Turn the JOG key to adjust the power. Switch the coarse adjustment and the fine adjustment by pressing the RECORD key, and adjust it. (initial state is the coarse adjustment.) 7. Press the PLAY/PAUSE key to regis

9、ter the adjustment if the power became the adjustment value. When it is registered, shift to the CD-RW Record Power Adjustment automatically. Note: In the CD-RW Bias Power Adjustment, in the case that the power is over 2.3 mW when the LD lighted, do not need to perform the Bias Power Adjustment. Set

10、 adjustment value of the CD-RW record power to + 0.9mW 0.05mW against the power in LD lighting then. 8. Turn the JOG key to adjust the power. Switch the coarse adjustment and the fine adjustment by pressing the RECORD key, and adjust it. (initial state is the coarse adjustment.) 9. Press the PLAY/PA

11、USE key to register the adjustment if the power became the adjustment value. When it is registered, shift to the CD-RW Erase Power Adjustment automatically. 10. Turn the JOG key to adjust the power. Switch the coarse adjustment and the fine adjustment by pressing the RECORD key, and adjust it. (init

12、ial state is the coarse adjustment.) 11. Press the ENTER key to register the adjustment if the power became the adjustment value. 12. Press the STOP key to goes out the LD, and adjustment is completed. 6.6.3 CD-RW Record Power Adjustment RW Bias : 2.3 mW 0.05 mW, RW Rec : 3.2 mW 0.05 mW, RW Erase :

13、5.2 mW 0.1 mW Pickup objective lens Optimizing CD-RW recording power of laser diode. Incapable of CD-RW recording, self-pre recorded CD-RW disc playback. Sound pauses, track jumping, or bad RF wave shape (though no failure in playing CD). Test Point Adjustment Value Purpose Symptom when Out of Adjus

14、tment Adjustment methodFL Indication Cautions: (1) All the reading values of power meter of this adjustment are values with an average. (2) How to confirm the adjustment value: When enter the power adjustment mode, enter it by pressing the RECORD and DISPLAY keys in order. Furthermore, can confirm t

15、he adjustment value of each power stored in EEPROM by switching the DISPLAY key. However, RW cannot see all adjustment results. Use DAC the same as erase power in the Bias Power Adjustment, and perform the adjustment of record power while outputting the setting value of erase power decided in the Bi

16、as Power Adjustment. And perform the Erase Power Adjustment while outputting the setting value of the record power. Therefore, the value of Bias Power Adjustment does not remain after adjustment of the erase power. (as for the displayed adjustment value, erase power is the same as bias power.) It is

17、 only erase power that can confirm the adjustment result with the power meter among power of RW. As for the value of Record Power Adjustment, only setting numeric value is readable, but output power becomes the same as the erase power. Bias power cannot confirm the setting value, too. Be not used du

18、ring actual record operations either. DANGER LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. 55 CDR-830 6.7 SERVO ADJUSTMENT 6.7.1 Preparations 1. Enter the TEST mode. 2. Press the INPUT SELECTOR key so that OPTICAL appears on the FL display. 3. Press the ERASE key more than three seconds

19、to initialize it. 4. Press the SYNCHRO key to perform the average process. ? OPTICAL disappears on the FL display when completed. MANUAL ADJUSTMENT Procedure 1. Monitor the FOCUS ERROR waveform with VC. 2. Adjust the JOG key so that FE offset becomes zero. 3. Press the ENTER key to register the adju

20、stment. 6.7.2 Focus Offset Adjustment 0 mV 30 mV Optimizing DC offset voltage of focus-error amplifier. Focus-in does not function, or bad RF wave shape. CN102-pin 8 (Focus err)Test Point Adjustment Value Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 FE VC 8 6 10: 1 pro

21、veOscilloscope Procedure 1. Press the AUTO/MANUAL key and shift to the SRFO Offset Adjustment. 2. Monitor the RFDC waveform with VC. 2. Adjust the JOG key so that RFDC offset becomes zero. 3. Press the ENTER key to register the adjustment. 6.7.3 SRFO Offset Adjustment 0 mV 30 mV CN102-pin 2 (RF)Test

22、 Point Adjustment Value Optimizing DC offset voltage of RFDC output circuit when recording. Recording does not function. Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 RF VC 2 6 10: 1 proveOscilloscope 56 CDR-830 Procedure 1. Press the AUTO/MANUAL key and shift to the RF

23、OM Offset Adjustment. 2. Monitor the RFDC waveform with VC. 2. Adjust the JOG key so that RFDC offset becomes zero. 3. Press the ENTER key to register the adjustment. 6.7.4 RFOM Offset Adjustment 0 mV 30 mV CN102-pin 2 (RF)Test Point Adjustment Value Optimizing DC offset voltage of RFDC output circu

24、it when playing back. Focus-in does not function, incapable of searching, or track jumping. Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 RF VC 2 6 10: 1 proveOscilloscope Procedure 1. Press the AUTO/MANUAL key and shift to the MPP Offset Adjustment. 2. Monitor the MPP

25、waveform with VC. 2. Adjust the JOG key so that MPP offset becomes zero. 3. Press the ENTER key to register the adjustment. 6.7.5 MPP Offset Adjustment 0 mV 50 mV CN102-pin 4 (MPP) Test Point Adjustment Value Playback does not function, incapable of searching, or track jumping. Optimizing DC offset

26、voltage of main signal output circuit.Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 MPP VC 4 6 10: 1 proveOscilloscope 57 CDR-830 Procedure 1. Press the AUTO/MANUAL key and shift to the SPP Offset Adjustment. 2. Monitor the MPX waveform with VC. 2. Adjust the JOG key so

27、 that SPP offset becomes zero. 3. Press the ENTER key to register the adjustment. 6.7.6 SPP Offset Adjustment 0 mV 50 mV CN102-pin 3 (MPX)Test Point Adjustment Value Optimizing DC offset voltage of sub-signal output circuit. Playback does not function, incapable of searching, or track jumping. Purpo

28、se Symptom when Out of Adjustment Adjustment methodFL Indication CN102 MPX VC 3 6 10: 1 proveOscilloscope Procedure 1. Press the AUTO/MANUAL key and shift to the Tracking Gain (MS MIX) Adjustment. 2. Move the Pickup to center of the disc by pressing the SCAN key. ( 1? ) 3. Monitor the MPX signal and

29、 set a CD disc. 4. Press the FINALIZE key to FOCUS IN. 5. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV) 6. Adjust the JOG key so that MPX waveform (MPP+SPP) becomes minimum. 7. Press the ENTER key to register the adjustment. 8. Press the STOP key to stop the disc rotation. 6.7.7 Tracking Gain

30、adjustment Minimize (MPP+SPP) CN102-pin 3 (MPX)Test Point Adjustment Value Matching gains of pickup main signal output and sub-signal output. Playback does not function, or incapable of searching. Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 MPX VC 3 6 10: 1 proveOscil

31、loscope 39k 0.001F 58 CDR-830 Procedure 1. Press the AUTO/MANUAL key and shift to the MPP Offset Readjustment. (Press the AUTO/MANUAL key several times to appear the right indication.) 2. Monitor the TE waveform with VC. Be careful with monitoring TE waveform instead of MPP waveform in the readjustm

32、ent ! 3. Adjust the JOG key so that TE offset becomes zero. 4. Press the ENTER key to register the adjustment. 6.7.8 MPP Offset Readjustment 0 mV 50 mV CN102-pin 5 (Tracking err)Test Point Adjustment Value Optimizing DC offset voltage of tracking-error output circuit. Playback does not function, inc

33、apable of searching, or track jumping. Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 TE VC 5 6 10: 1 proveOscilloscope 59 CDR-830 Procedure 1. Press the AUTO/MANUAL key and shift to the Focus Bias Adjustment. 2. Press the SYNCHRO key to perform the average process. OPTI

34、CAL disappears on the FL display when completed. 3. Move the Pickup to center of the disc by pressing the SCAN key. ( 1? ) 4. Monitor the jitter value and set a CD disc. (use the jitter meter) 5. Press the FINALIZE key to FOCUS IN. 6. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV) 7. Press the

35、PLAY/PAUSE key to TRACKING ON. (EFM CLV) 8. Adjust the JOG key so that jitter value becomes minimum. 9. Press the ENTER key to register the adjustment. Shift to the RFDC Level Adjustment automatically. 10. Adjustment is completed automatically. Each display the reason that became abnormal when adjus

36、tment was not completed normally. When did not converge in limit of adjustment possibility (when it became the lowest level) When failed in writing to the EEPROM 11. Press the STOP key to stop the unit. Caution: In this adjustment, shift to the RFDC Adjustment when pressing the ENTER key before step

37、 9, and there is it when completed in normal on the indication. However, must not omit operation of steps 7 from 5 because RFDC is not adjusted to normal when pressing the ENTER key with the state that steps 7 from 5 are not executed. The arbitrary value that modified it by adjustment. ? is not disp

38、layed in the point that selected an item with the AUTO/MANUAL key, and blink when changes setting value by the input of the JOG key. Press the ENTER key to register the setting value, and disappear the FL indication that the setting value is stored in the EEPROM by normal. 6.7.9 Focus Bias Adjustmen

39、t Minimize jitter value CN102-pin 2 (RF)Test Point Adjustment Value Optimizing DC offset voltage of focus servo loop circuit including pickup. Focus-in does not function, sound pauses, bad RF wave shape, or incapable to playback some discs. Purpose Symptom when Out of Adjustment Adjustment methodFL

40、Indication CN102 RF VC 2 6 10: 1 proveOscilloscope 60 CDR-830 AUTOMATIC ADJUSTMENT Procedure 1. Press the INPUT SELECTOR key so that OPTICAL appears on the FL display. If it was not displayed the Focus Offset Adjustment, press the AUTO/MANUAL key and shift to the Focus Offset Adjustment. 2. Monitor

41、the MPX signal with VC and set a CD disc. 6.7.10 Preparation CD test disc (STD-903) CN102-pin 3 (MPX)Test Point Discs to be Used MethodFL Indication CN102 MPX VC 3 6 10: 1 proveOscilloscope Procedure 1. Press the RECORD key to start the automatic adjustment. Execute it from 6.7.1 preparations to 6.7

42、.6 SPP Offset Adjustment of the Manual Adjustment automatically. And stop by the state that selected an item of next 6.7.7 Tracking Gain Adjustment once. 6.7.11 Automatic Adjustment Start MethodFL Indication Procedure 1. Move the Pickup to center of the disc by pressing the SCAN key. ( 1? ) 2. Monit

43、or the MPX signal with VC and set a CD disc. 3. Press the FINALIZE key to FOCUS IN. 4. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV) 5. Adjust the JOG key so that MPX waveform (MPP+SPP) becomes minimum. 6. Press the ENTER key to register the adjustment. Stop the disc rotation and Excute 6.7.8

44、MPP Offset Readjustment automatically. And select an item of next 6.7.9 Focus Bias Adjustment, and stop with the state completed to average processing. 6.7.12 Tracking Gain Adjustment Minimize (MPP + SPP) CN102-pin 3 (MPX)Test Point Adjustment Value Matching gains of pickup main signal output and su

45、b-signal output. Playback does not function, or incapable of searching. Purpose Symptom when Out of Adjustment Adjustment methodFL Indication CN102 MPX VC 3 6 10: 1 proveOscilloscope 39k 0.001F 61 CDR-830 Procedure 1. Move the Pickup to center of the disc by pressing the SCAN key. ( 1? ) 2. Monitor

46、the jitter value and set a CD disc. (use the jitter meter) 3. Press the FINALIZE key to FOCUS IN. 4. Press the PLAY/PAUSE key to turn the SPINDLE. (CAV) 5. Press the PLAY/PAUSE key to TRACKING ON. (EFM CLV) 6. Adjust the JOG key so that jitter value becomes minimum. 7. Press the ENTER key to registe

47、r the adjustment. Shift to the RFDC Level Adjustment automatically. 8. Adjustment is completed automatically. Each display the reason that became abnormal when adjustment was not completed normally. When did not converge in limit of adjustment possibility (when it became the lowest level) When faile

48、d in writing to the EEPROM 9. Press the STOP key to stop the operation. Caution: In this adjustment, shift to the RFDC Adjustment when pressing the ENTER key before step 7, and there is it when completed in normal on the indication. However, must not omit operation of steps 5 from 3 because RFDC is

49、not adjusted to normal when pressing the ENTER key with the state that steps 5 from 3 are not executed. How to execute the automatic adjustment once again after the automatic adjustment is completed: 1. Press the STOP key to stop the disc rotation. (servo OFF) 2. Press the AUTO/MANUAL key and shift to the Focus Offset adjustment. 3. Press the RECORD key to start the automatic adjustment. Adjust from 6.7.11 automatic Adjustment Start to 6.7.13 Focus Bias Adjustment. Press the STOP key when stops execution of the automatic adjustment on the way and