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1、SERVICE MANUAL DATA MD / CD STEREO SYSTEM BASIC TAPE MECHANISM : TN-21ZSC-2003 BASIC CD MECHANISM : DA11T3C BASIC MD MECHANISM : AZG-4 A LCX-MD211EZ S/M Code No. 09-00B-429-4S2 SUPPLEMENT This Service Manual contains the additional information “TEST MODE”, “ADJUSTMENT”, “IC BLOCK DIAGRAM”, “IC DESCR
2、IPTION”, “LCD DISPLAY” and “VOLTAGE” for the model LCX-MD211(EZ). If requiring the other information, see Service Manual of LCX-MD211(EZ), (S/M code No.09-007-429-4R2). LCXMD211 SYSTEMSPEAKER SX-MD210 REMOTE CONTROLLER RC-AAT11 RadioFans.CN 收音机爱 好者资料库 2 TEST MODE 1-1 How to activate CD Test Mode Ins
3、ert the AC plug while pressing the CD function button. Test mode will be activated and CD TEST will be appeared in the LCD display. Note: Test mode can not be activated when CD door switch is opened. 1-2 CD Test Mode Functions CD TEST MODE * Note 1: There are cases when CD cannot be operated owing t
4、o the protection circuit being operated when heat builds up in the driver IC if the focus search is operated continually for more than 10 minutes. In this case, the power supply should be switched off for ten minutes until heat has been reduced and then re-start. 1-3 How to cancel CD Test Mode Eithe
5、r one of the following operations will cancel the CD test mode. Open the CD door switch. Press POWER button. Disconnect the AC plug. LCD TEST MODE 1-1 How to activate LCD Test Mode Insert the AC plug while pressing the DISPLAY button. LCD display is fully illuminated and then all segments are lit on
6、 and off every one second. 1-2 How to cancel LCD Test Mode LCD test mode will cancel by press POWER button or disconnect the plug. Start Mode Display Search Mode Continuous Focus Search (Pickup lens repeat full swing) * Note 1 Activate CD Test Mode CD TEST FunctionModeOperationContent SEARCH Play Mo
7、dePLAY Normal Playback When TOC READ is unavailable, continuous Focus Search (Same as Search Mode Operation) Focus servo Tracking servo CLV servo Sled servo Traverse ModeTRAVERS Tuner Function Button Playback pause statusTracking servo OFF Sled Mode SLED IN SLED OUT Shift to the internal circumferen
8、ce of pickup Shft to the external circumference of pickup Sled servo Mecha operation check s E g f APC circuit check Laser current measurement Focus error waveform check RadioFans.CN 收音机爱 好者资料库 3 MD TEST MODE 1-1 How to start up MD Test Mode Insert the AC plug while pressing the MD function button.
9、After the MD test mode has started up, MD TEST message appears and the test mode becomes operatable. Note: Disconnect the AC plug immediately if any mechanism abnormalities. Playback and recording are not possible during the test mode. 1-2 How to cancel MD Test Mode 1) Press the MD EJECT button and
10、remove the disc. 2) Disconnect the AC plug or press POWER button. 1-3 Operation Check Mode 1) Checks after the test mode has started up. The following playback audio circuits can be checked. Enable circuit to check - DAC, LINEAMP, HEADPHONE AMP Output level - 1KHz, -24dB 2) Switch status check ON/OF
11、F statuses of main unit and mechanism switches can be checked on display. 1-4 How to switch to Servo Standby Mode When the test mode has been established, the mode changes to the servo standby mode by pressing s button (lndication on display : ALL SVOFF). The various check modes can be entered from
12、this mode. Pressing the s button during each operation returns to ALL SVOFF. 1-5 Checking Sled Operation 1) When g button is pressed in the ALL SVOFF state, pickup moves in the outer direction. T SLEDFWD is displayed. 2) When g button is pressed in the ALL SVOFF state, pickup moves in the inner dire
13、ction. T SLEDRVS is displayed. 1-6 Checking Laser Power 1) The laser power is switched each time the EDIT button is pressed in the ALL SVOFF state. Laser power output is changed as OFFbLASER READbLASER 1/2bLASER WRITEbOFF order and indication on the display is follows; OFF Indication on display LASE
14、R 1/2 WRITE Mode LASER READ LASER WRITE ALL SVOFF LA READ LA 1/2 LA WRITE 2) Press s button to return the display to ALL SVOFF after checking. 1-7 Checking OWH (Over Write Head) Operation The operation of OWH can be checked by pressing following buttons in the loading status. MD EJECT button-OWH UP
15、SYNCHRO REC button-OWH DOWN * Note: Do not down OWH when using the high reflection disc (CD). 1-8 Checking Servo Operation Checking the focus search and spindle kick 1 1) When E button is pressed in the ALL SVOFF state without disc, focus search and spindle kick are executed continuously. FOCUS SCH
16、is displayed. REC PROTECT Switch state REFRECT When the high reflection disc (CD) is used. TOC EDIT Switch nameIndication on DisplayUsalde disc MD REC INNER MONO Playback only disc When the write-protection tab of disc is stopped. When the pickup is the positioned at the innermost track (when the LI
17、MIT SW is ON). Record/playback disc RadioFans.CN 收音机爱 好者资料库 4 2) Press s button to display ALL SVOFF after checking Checking the focus search and spendle kick 2 1) When TUNER function button is pressed in the ALL SVOFF state regardless disc existence, focus search and spindle kick are executed conti
18、nuously. FOCUS CHK is displayed and S curve can be checked if disc is loaded. 2) Press s button to display ALL SVOFF after checking. Checking Focus Servo 1) Insert a test disc. 2) Move pickup to center track by pressing g or f buttons. 3) Press JOG MODE button to set the servo mode according to the
19、inserted disc as follows; MO disc (MO)-Indication on display SEL GRV. PIT disc (CD)-Indication on display SEL PIT. 4) Press E button. If focus servo is operating normally, the messge FOCUS ON is displayed after FOCUS SCH. 5) Press s button to display ALL SVOFF after checking. Checking all Servos are
20、 turned on. 1) Tracking and sled servos and turned on and all servos work when ENTER button is pressed in the FOCUS ON! state. ALL SV ON is displayed if all servos are normal. 2) Press s button to display ALL SVOFF after checking. 5 ADJUSTMENT TP4 (VT)FFE801 L981 14 IC721 + + TP7(Rch) C786 TP8(Lch)
21、C785 TP6TP5 2826 IC771 L772 L771 IC201 IC202 J201 MAIN C.BA L941L942 TC942 1.MW VT Check Settings : Test point : TP4 (VT) Method :Set to MW 1602kHz and check that the test point is less than 5.6V. 2.MW Tracking Adjustment Settings : Test point : TP7 (RCH), TP8 (LCH) Adjustment location :L981 Method
22、:Set to MW 999kHz and adjust L981so that the test point becomes maximum. 3.AM IF Adjustment Settings : Test point : TP7 (RCH), TP8 (LCH) Adjustment location: L772 . 450kHz 4.LW VT Adjustment Settings : Test point : TP4 (VT) Adjustment location :L942 Method :Set to LW 153kHz and adjust L942 so that t
23、he test point becomes 1.3V 0.05V. 5.LW Tracking Adjustment Settings : Test point : TP7 (RCH), TP8 (LCH) Adjustment location : L941 . 153kHz TC942. 285kHz Method :Set up TC942 to center before adjustment. The level at 153kHz is adjusted to maxinum by L941. Then the level at 285kHz is adjusted to maxi
24、num by TC942. 6.FM VT Check Settings : Test point : TP4 (VT) Method :Set to FM 108MHz and check that the test point is less than 8.2V .Then set to FM 87.5MHz and check that the test poit is more than 1.5V. 7.FM Tracking Check Settings : Test point : TP7 (RCH), TP8 (LCH) Method :Set to FM 98MHz and c
25、heck that the test point is less than 18dB. 8.DC Balance / Mono Distortion Adjustment Settings : Test point : TP5, TP6 (DC balance) TP7 (RCH), TP8(LCH)(Distortion) Adjustment location :L771 Input level : 54dB Method :Set to FM 98MHz and adjust L771 so that the voltage between TP3 and TP4 becomes 0V
26、0.04V. Next, check that the distortion is less than 1.5%. 9.FM Separation Check Settings : Test point : PHONE JACK (J201) Input level : 54dB Method :Set to FM 98MHz and check that the test point is more than 20dB. 10. Head Azimuth Adjustment Settings : Test tape : TTA330 Test point : PHONE JACK (J20
27、1) Adjustment location :Head azimuth adjustment screw Method :1) Connect the L positive terminal to CH1 probe (positive side) of oscilloscope and L negative terminal to CH1 probe (negative side). Connect the R positive and negative terminals to CH2 probe same condition as CH1 probe. 2) Play back the
28、 10kHz signal of the test tape. 3) Adjust the head azimuth adjustment screw to become maximum waveform in the oscilloscope and same phase for CH1 and CH2. 6 CD C.B CN401 SFR430 TP (VREF) IC404 CN405 CN403 IC402 IC401 41 TP(RFSM) TP(TE) R405 C431 + Note: Connect a provbe (10 : 1) of the oscilloscope
29、to adjust. Connect negative side of the oscilloscope to TP (VREF) for each adjustment. 1. Focus Bias Adjustment Adjust focus bias when replaing or repairing the optical block. 1) Connect an oscilloscope to the test points TP (RFSM) and TP(VREF). 2) Turn on the POWER button. 3) Insert the test disc T
30、CD-782 (YEDS-18) and playack the 2nd composition. 4) Adjust SFR430 so that RF signal of the test point is MAX and CLEARREST. 2. Tracking Balance Adjustment 1) Connect an oscilloscope to the test point TP (TE) and TP (VREF). 2) Active the CD test mode. 3) Insert the test disc TCD-782 (YEDS-18) and ch
31、oose traverse mode of CD test mode. 4) Check that the waveform of traverse is vertically symmetrical as shown below. 5) Cancel CD test mode after checking. + _ Oscilloscope (DC range) TP (RFSM) TP (VREF) + _ Oscilloscope (DC range) TP (TE) TP (VREF) EYE PATTERN must be CLEAR and MAX Max VOLT/DIV: 0.
32、5V TIME/DIV: 0.5uS A B VOLT/DIV: 20mV TIME/DIV: 1mS A=B VREF 7 Perform 13 adjustment when display showing NO ADJUST. 1. Temperature Compensation Adjustment Test point: Check on the display. Tool : Thermometer Adjustment procedure 1) After MD test mode has started up, press s button to display ALL SV
33、OFF. 2) Press DISPLAY button to display TEMP = . 3) Press T-BASS button to display T + * C #. 4) Put the thermometer near the MD mechanism to measure the room temperature. 5) Adjust the indication value * using l and j buttons until the value is the same as room temperature. Press ENTER button after
34、 adjusting. 6) Ptess s button to display ALL SVOFF after adjusting. 7) After adjustment is completed, once again set the display to TMP + * C # and check the value that has been caluculated with the addition or subtraction of the numerical values of # in relation to the * value. This value is to be
35、the same sa room temperature. NOTE: Do not perform this adjustment if it is not possible to measure the room temperature. 2. Laser Power Adjustment Test point: Pickup laser output Tool : Laser power meter Adjustment procedure 1) Starting in the ALL SVOFF status, press EDIT button three times to chan
36、ge the display to LA WRITE. 2) Press T-BASS button once and change the display to LASER = *. 3) Measure the laser output of pickup with the laser power meter and adjust output by g or f buttons so that the measurement value becomes 6.8mW 0.03mW. Press ENTER button after adjusting. 4) Press s button
37、to display ALL SVOFF after adjusting. Caution: There is a possibility that pickup may be damaged if laser output exceeds 7.0mW. 3.Auto Sequence Adjustment (EFB/IVR/FOCUS AGC/TRACKING AGC adjustment) Test disc: MDW-60, TGYS-1 Adjustment MO disc 1) Insert the MDW-60 test disc. 2) Press s button to dis
38、play ALL SVOFF. 3) Press JOG MODE button to display SEL GRV. 4) When pressing MD function button, AUTO ADJ is displayed and adjustment start. After adjusting, DONE is displayed. (If FAILED is displayed, the adjustment failed.) 5) Press s button to display ALL SVOFF. NOTE: 1.As there is a posibility
39、that adjustment may not be able to adequately performed if the disc is dirty or scratched, make sure to keep the disc clean. 2.When using a MO disc, one section will be erased in order to change it to WRITE POWER, so a special disc is to be used. Checking for IVR, EFB and focus/tracking/sled gain of
40、 MO disc 1) Move the pickup to the center track using g or f buttons. 2) Press E button to display FOCUS ON. 3) Press ENTER button to switch the mode to ALL SV ON. 4) Press s button and DISPLAY button twice. S S S S S S Then, confirm the values of I * E in the display are within the following range.
41、 * . 040A . 0915 5) Press DISPLAY button again. Confirm the values of F * T # S I I in the display are within the following range. * . 1A45 # . 0003 I I . 0003 6) Press s button to display ALL SVOFF. Adjustment for PIT disc 1) Insert the TGYS-1 test disc. 2) Press s button to display ALL SVOFF. 3) P
42、ress JOG MODE button to display SEL PIT. 4) When pressing MD function button, AUTO ADJ is displayed and adjustment start. After adjusting, DONE is displayed. (If failed is displayed, the adjustment failed.) 5) Press s button to display ALL SVOFF. Checking IVR, EFB and focus/tracking/sled gain of PIT
43、 disc Perform the same procedures as for MO disc and check that the display is within the range below; IVR.1419 EFB.0915 FOCUS GAIN.1A45 Tracking gain.003F Sled gain.003F 4. Checking Error Rate (PIT disc) 1) Insert the TGYS-1 test disc. 2) Move the pickup to the center track using g or f buttons. 3)
44、 Press JOG MODE button to display SEL PIT. 4) Press E button to display FOCUS ON. 5) Press ENTER button to switch the mode to AL SV ON. Then press DISPLAY button twice to display 00 * 000. 6) Check the value of * is below 30 at this time. 7) Press s button to display ALL SVOFF. 5. Checking Record/Pl
45、ayback Error Rate (MO disc) 1) Insert the MDW-60 test disc. 2) Move the pickup to the center track using g or f buttons. 3) Press JOG MODE button to display SEL GRV. 4) Press MD REC button to display R ANALOG. 5) Press E button to display FOCUS ON. 6) After displaying ALL SV ON by pressing ENTER but
46、ton, press SYNCRO REC button. 7) Recording begins after OWH has moved when MD REC button is pressed once again. At this time, display will change from ALL SV ON to A0600C # S. 8) Press s button after recording has progressed for about 15 seconds, changing the display to ALL SVOFF. 9) Press MD EJECT
47、button to raise the OWH. 10) Press E button to display FOCUS ON. 11) Once ALL SV ON has been displayed by pressing ENTER button, press DISPLAY button to display A * C # S. After * reaching 600, press DISPLAY button once again to display 00 / 000. Check that the value of / is below than 20 at this time. 8 12) Press s button to display ALL SVOFF.
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