Aiwa-XR-MD100-MD101-Service-Manual-Suppl 电路图 维修手册.pdf

《Aiwa-XR-MD100-MD101-Service-Manual-Suppl 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Aiwa-XR-MD100-MD101-Service-Manual-Suppl 电路图 维修手册.pdf（8页珍藏版）》请在收音机爱好者资料库上搜索。

1、MD/CD STEREO SYSTEM XR-MD100 XR-MD101 S/M Code No. 09-993-315-0S1 U(S),K(S) EZ(S) SERVICE MANUAL SUPPLEMENT This service manual contains information only on the TEST MODE and ELEC- TRICAL ADJUSTMENT of XR-MD100(U,K)/MD101(EZ). For more information, please refer to the following service manuals. XR-M

2、D100 U (S/M Code No.09-993-315-0R1) XR-MD100 K/MD101 EZ (S/M Code No.09-993-315-0R3). DATA BASIC TAPE MECHANISM : 2ZM-1 YR9 BASIC CD MECHANISM : 3ZG-3 E3N BASIC MD MECHANISM : 7ZG-9 YB RadioFans.CN 收音机爱 好者资料库 2 1. CD Test Mode 1-1. Starting Up the CD Test Mode While pressing the “CD” button, connect

3、 the AC plug to the power outlet. When the CD test mode starts up, all displays turn on. 1-2. How to Release the CD Test Mode To release the CD test mode, press the “POWER” button or the function buttons other than the “CD” button, or disconnect the AC plug from the power outlet. 1-3. Function Descr

4、iption of the Test Mode Note: If the focus search operation is continued for 10 minutes or longer, the driver IC heats up sufficiently to trigger the protection circuit, which stops the CD system. Turn off the main power and re-start operation about 10 minutes later. 2. MD Test Mode 2-1. Starting Up

5、 the MD Test Mode While pressing the “MD” button, connect the AC plug to the power outlet. About one second later after the MD test mode has started up, the following message appears and the MD test mode becomes operable. Note: 1.If operation of the mechanism shows any abnormality during the test mo

6、de, disconnect the AC plug immediately. 2.Playback and recording are not possible during the test mode. 3.If a disc cannot be inserted, insert a disc part way and press the “CD 2 MD DIRECT REC” button. The disc can then be fully inserted. MODE Start mode Focus search mode Play mode Traverse mode Sle

7、d mode Operation CD key + AC plug IN STOP key PLAY key PAUSE key F.SKIP key B.SKIP key Indication on display All indicators light CD Track No. and playing time (spectrum analyzer) Track No. and playing time CD TEST Function and movement CD TEST mode starts All indicators light LD lights Continuous f

8、ocus search Continuous spindle motor kick Normal playback When TOC reading is not possible, the focus search continues Tracking servo is turned off The pickup moves to the innermost track The pickup moves to the outermost track Check item Check all indicators light Microprocessor DATA BUS LINE APC c

9、ircuit LASER current Check the focus search waveform Check the focus error waveform Focus servo circuit DRF output Spindle servo line Same checks as shown in the above column Each servo circuit Check the tracking error waveform Tracking circuit Sled circuit Mechanism (gear and motor) MDTSET TEST MOD

10、ERadioFans.CN 收音机爱 好者资料库 3 2-2. How to Exit the MD Test Mode 1) Press the “MD EJECT” button and remove the disc. 2) Disconnect the AC plug from the power outlet. *If the machine exits the MD test mode by any methods other than the procedure described above, the machine may operate abnormally when th

11、e POWER is turned on next time. If this happens, disconnect the AC plug. 2-3. Operation Check Mode 1) Checks after the test mode has started up The following playback audio circuits can be checked. The circuits that can be checked:. DAC, LINE AMP and HEADPHONE AMP Output level: . 1 kHz, -21 dB 2) Sw

12、itch status check The ON/OFF states of the respective switches on the machine and mechanism can be checked on the display. 3) How to Switch to Servo Standby Mode When the MD test mode has been established, the mode changes to the servo standby mode and “ALL SV OFF” is displayed by pressing the 9 but

13、ton. The various check modes can be entered from this mode. Pressing the 9 button during each operation returns to “ALL SV OFF”. 4) Checking the Sled Operation The operation of the sled motor and pickup can be checked by pressing the 6 (to outermost track) and 5 (to innermost track) buttons in the “

14、ALL SV OFF” state. “T.SLED FWD” appears while moving to the outermost track and “T.SLED RVS” appears while moving to the innermost track. 5) Checking the Laser Output The laser power output level is switched each time the “MD EDIT” button is pressed when “ALL SV OFF” appears and the operation stops.

15、 The laser power output level is repeatedly changed in the order of OFF LASER READ LASER 1/2 LASER WRITE. The indications are as follows. *After checking, press the 9 button to return the display to “ALL SV OFF”. 6) Checking the Operation of OWH (Over Write Head) The OWH operation can be checked in

16、the loading-completed state. “MD 2 CD” button .OWH DOWN “ / MD EJECT” button.OWH UP Note: Do not move down the OWH while using a high reflection disc (CD). Switch NameSwitch StateIndication on displayUsable disc REC PROTECTWhen the write-protection tab of a disc is closed to ONROCKDisc for record/pl

17、ayback REFRECTWhen the high reflection disc (CD) is usedPOPDisc for playback only INNER When the pickup is at the innermost JAZZ track (when the LIMIT switch is ON) A LSVLOFF MODEIndication on display OFFALL SV OFFT-BASS LASER READLASER READT-BASS LASER 1/2 WRITELASER 1/2T-BASS LASER WRITELASER WRIT

18、ET-BASS RadioFans.CN 收音机爱 好者资料库 4 7) Checking the focus search and spindle kick The focus search and the spindle kick can be checked by pressing the W button in the “ALL SV OFF” state without inserting a disc. During checking, the message “FOCUS SEARCH” is displayed. After checking these operations,

19、 press the 9 button to return the display to “ALL SV OFF”. 8) Checking the focus servo Insert a test disc. Move the pickup to the center track using the 6 and 5 buttons. Press the “MD MODE” button until the following servo mode is selected in accordance with the inserted disc. MO disc (MO) .Display

20、“SELECT GRV”. (“TIME MARK” lights.) PIT disc (CD).Display “SELECT PIT”. (“AUTO MARK” lights.) Press the W button. If the focus servo is operating normally, the message “FOCUS ON!” is displayed after “FOCUS SEARCH”. After the checking is completed, press the 9 button to return the display to “ALL SV

21、OFF”. 9) Checking that all servo loops are turned on The tracking servo and the sled servo are turned on and all servo loops work when the “ENTER” button is pressed in the “FOCUS ON!” state. If all servo loops are normal, “ALL SV OFF” is displayed. After the checking is completed, press the 9 button

22、 to return the display to “ALL SV OFF”. 3. Adjustment Mode 3-1. Temperature Compensation Adjustment Test point: Check the test point on the display. Tool: Thermometer Adjustment procedure: 1) After the MD test mode has started up, press the 9 button to display “ALL SV OFF”. 2) Press the “DISPLAY” bu

23、tton to display “TMP = $”. 3) Press the ; button to display “TMP + *C: + 00”. 4) Put the thermometer near the MD mechanism to measure the room temperature. 5) Adjust the indication value * using the 5 button and 6 button until the value is the same as the room temperature. After the adjustment is co

24、mplete, press the “ENTER” button. 6) Then, press the 9 button to return the display to “ALL SV OFF”. 7) After the above setting, reduce or add the value indicated by the sharp sign (#) of “TMP + *C: + #” from or to the value indicated by the asterisk (*) of “TMP + *C: + #”. The calculated value must

25、 be the room temperature. Note: Normally, do not perform the temperature compensation adjustment. FOSUOCN ! A LSVLON 5 3-2. Laser Power Adjustment Test point: Pickup laser output Tool: Laser power meter Adjustment procedure: 1) Press the “MD EDIT” button three times in the “ALL SV OFF” state to chan

26、ge the display to “LASER WRITE”. 2) Press the ; button to change the display to “LASER = $*”. 3) Adjust the laser power meter so that the value is within 6.8 0.03 mW using the 5 button or 6 button. 4) After adjustment, press the “ENTER” button and press the 9 button to return the display to “ALL SV

27、OFF”. Note: If the laser power exceeds 7.0 mW, the pickup may be damaged. 3-3. Adjustment and Check of Auto Sequence Test disc: MDW-60, TGYS-1 When adjusting the MO disc: 1) Insert the test disc MDW-60. 2) Press the “MD MODE” button to display “SELECT GRV”. 3) Press the “MD” button to display “AUTO

28、ADJ”. After adjustment, “DONE” appears. (If “FAILED” is displayed, the adjustment failed.) 4) After the adjustment is completed normally, press the 9 button to return the display to “ALL SV OFF”. Note: 1.Be sure to use a clean disc because adjustment may be impossible if the disc is dirty or scratch

29、ed. 2.Be sure to use an MO disc for recording because the writing power of the MO disc is tested and part of the recorded data is erased. How to check the IVR, EFB and focus/tracking/sled gain 1) Move the pickup to the center track using the 5 button and 6 button. 2) Press the W button to display “F

30、OCUS ON!”. 3) Press the “ENTER” button to switch the mode to “ALL SV ON”. 4) Press the 9 button and press the “DISPLAY” button twice. Then, confirm that the values of “IV$*:EF$” are within the following ranges. “*” . 03-07 “” . 09-12 5) Press the “DISPLAY” button again to display “GF* + #s33”. Confi

31、rm that the values of the hexadecimal indication on display are within the following ranges. “*” . 20-40 “#” . 15-35 “33” . 15-35 6) After adjustment, press the 9 button to return the display to “ALL SV OFF”. When adjusting the PIT disc: 1) Insert the test disc TGYS-1. 2) Press the “MD MODE” button

32、to display “SELECT PIT”. 3) Press the “MD” button to display “AUTO ADJ”. After adjustment, “DONE” appears. (If “FAILED” is displayed, the adjustment failed.) 4) After the adjustment is completed normally, press the 9 button to return the display to “ALL SV OFF”. Checking the IVR, EFB and focus/track

33、ing/sled gain of the PIT disc Confirm that the values on the display are within the following ranges. “IVR” .13-19 “EFB”.09-12 “Focus gain”. 2A-45 “Tracking gain”. 20-40 “Sled gain” . 20-40 6 3-4. Checking the Playback Error Rate (PIT disc) 1) Insert the test disc TGYS-1. 2) Move the pickup to the c

34、enter track using the 5 button and 6 button. 3) Press the “MD MODE” button to display “SELECT PIT”. 4) Press the W button to display “FOCUS ON!”. 5) Press the “ENTER” button to display “ALL SV ON”, and press the “DISPLAY” button to confirm that the address display advances regularly. 6) Press the “D

35、ISPLAY” button again to display the playback error rate, and confirm that the value shown by the asterisks (*) of “Er*:#” is “0030” or less. 7) After adjustment, press the 9 button to return the display to “ALL SV OFF”. 3-5. Checking the Record/Playback Error Rate (MO disc) 1) Insert the test disc M

36、DW-60. 2) Move the pickup to the center track using the 5 button and 6 button. 3) Press the “CD” button; OWH starts moving and recording from the 600th cluster. 4) After recording for about 15 seconds, press the 9 button to display “ALL SV OFF” 5) Press the “AUX” button to change the mode to “ALL SV

37、 ON”, and press the “DISPLAY” button at the 600th cluster. Then, confirm that the value shown by the asterisks (*) of “Er*:#” is “0020” or less. 6) After adjustment, press the 9 button to return the display to “ALL SV OFF”. 3-6. UTOC Erase Perform the following procedure if the recorded disc needs t

38、o be erased. 1) Insert the test disc of the UTOC to be erased. 2) Move the pickup to the center track using the 5 button and 6 button. 3) Press the “MD MODE” button to display “SELECT GRV”. 4) Press the “MD REC” button to display “REC Analog”. 5) Press the W button to display “FOCUS ON!”. 6) Press t

39、he “ENTER” button to display “ALL SV ON”. 7) Press the “TAPE REC/REC MUTE” button to display “UTOC ERASE”. The UTOC is erased. 8) After the UTOC is erased, “ALL SV OFF” appears on the display. 7 Note: Connect a probe (10:1) for adjustment. Connect the ground (-) terminal of the oscilloscope probe to

40、 TP3 (VREF) for all adjustments. 1.Focus Bias Adjustment Perform the focus bias adjustment when replacing the optical block to be repaired. Oscilloscope (DC range) + RF VREF 1) Connect an oscilloscope to test points RF and VREF. 2) Turn on the power switch. 3) Insert the test disc TCD-782 (YEDS-18)

41、and play back the second program. 4) Adjust SRF130 so that the waveforms of the oscilloscope have maximum amplitude and the lozenge shape of waveforms is clear. 0V EYE PATTERN must be CLEAR and MAX. MAX 1.80.1 Vp-p VOLT/DIV: 0.5V TIME/DIV: 0.5S 2.Tracking Balance Adjustment Oscilloscope (DC range) +

42、 TE VREF 1) Connect the oscilloscope to the test points TE and VREF. 2) Start up the CD test mode. 3) Insert the test disc TCD-782 (YEDS-18) to switch the CD test mode to the traverse mode. 4) Confirm that the traverse waveform of the oscilloscope is vertically symmetrical as shown in the figure bel

43、ow. 5) After checking, release the CD test mode. A B A=B VREF VOLT/DIV: 20mV TIME/DIV: 1mS 3.Laser Current Adjustment The laser current can be checked on R2 (voltage across 10 ). The difference from the value shown on the label must be within 6.0 mA. KSS-213F 15165 SG442 44.2mA Voltage across R2 10 Laser current Iop = ELECTRICAL ADJUSTMENT IC1 IC2 RF VREF TE R2 SFR130 CD C.B C41 R6 C12 C14 1 931196 Printed in Singapore 211, IKENOHATA 1CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111