Aiwa-AMLM918-md-ssm维修电路原理图.pdf

SERVICE MANUALDATAMINI DISC RECORDERBASIC MD MECHANISM : AZG-W YAFAM-LM918YS/M Code No. 09-016-446-9R1REVISION This Service Manual is the “Revision Publishing” and replaces “Simple Manual”AM-LM918 (Y), (S/M Code No. 09-015-446-9T1). If requiring information about the MD mechanism, see Service Manual of AZG-W YAF, (S/M Code No. 09-015-355-9N2).RadioFans.CN 收音机爱 好者资料库 2 Scanning methodNon-contact optical scanner(Semiconductor laser application)Recording systemMagnetic polarity modulationoverwrite systemRotation speedApprox. 400 to 900 rpm (CLV)Sampling frequency44.1 kHzNo. of channelsStereo: 2 channelsMonaural: 1 channelA/D, D/A converter1-bitFrequency20 to 20000 HzWow and flutterUnmeasurableAUX DIGITAL INSampling frequency: 48 kHz / 44.1 kHz / 32 kHzOptical input level: more than -21 dBmCD DIGITAL INDimensions (W x H x D)210 x 82.5 x 243 mmWeight1.3 kgSPECIFICATIONS Design and specifications are subject to change without notice.ACCESSORIES / PACKAGE LISTDESCRIPTIONREF. NO.KANRINO.PART NO. 1 87-B30-024-010 CABLE,OPTICAL MC-901 1MRadioFans.CN 收音机爱 好者资料库 3 This set employs laser. Therefore, be sure to follow carefullythe instructions below when servicing.WARNING!WHEN SERVICING, DO NOT APPROACH THE LASEREXIT WITH THE EYE TOO CLOSELY. IN CASE IT ISNECESSARY TO CONFIRM LASER BEAM EMISSION.BE SURE TO OBSERVE FROM A DISTANCE OF MORETHAN 30cm FROM THE SURFACE OF THE OBJEC-TIVE LENS ON THE OPTICAL PICK-UP BLOCK.sCaution: Invisible laser radiation whenopen and interlocks defeated avoidexposure to beam.sAdvarsel: Usynlig laserstling ved bning,nr sikkerhedsafbrydere er ude af funktion.Undg udsttelse for strling.VAROITUS!Laiteen Kyttminen muulla kuin tss kyttohjeessamainitulla tavalla saataa altistaa kyt-tjnturvallisuusluokan 1 ylittvlle nkymttmllelasersteilylle.VARNING!Om apparaten anvnds p annat stt n vad somspecificeras i denna bruksanvising, kan anvndarenutsttas fr osynling laserstrlning, som verskridergrnsen fr laserklass 1.PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGPrecaution to replace Optical block(KMS-260E)Body or clothes electrostatic potential couldruin laser diode in the optical block. Be sureground body and workbench, and use care theclothes do not touch the diode.1) After the connection, remove solder shown inright figure.CLASS 1LASER PRODUCTKLASSE 1LASER PRODUKTLUOKAN 1LASER LAITEKLASS 1LASER APPARATCAUTIONUse of controls or adjustments or performance of proceduresother than those specified herin may result in hazardous radiationexposure.ATTENTIONLutillisation de commandes, rglages ou procdures autres queceux spcifis peut entraner une dangereuse exposition auxradiations.ADVARSELUsynlig laserstling ved bning, nr sikkerhedsafbrydereer udeaf funktion. Undg udsttelse for strling.This Compact Disc player is classified as a CLASS 1 LASERproduct.The CLASS 1 LASER PRODUCT label is located on the rearexterior.MD PICK-UP Assy PWB1 VEE TRK Pattern sideSolder1-RadioFans.CN 收音机爱 好者资料库 4 ELECTRICAL MAIN PARTS LISTIC 87-A20-870-010 IC,GP1F37R 87-A21-175-040 C-IC,TC74VHC14FTTRANSISTOR 87-A30-087-080 C-FET,2SK2158 87-A30-484-080 C-TR,KRA102S 87-A30-490-080 C-TR,KRC107S 87-A30-447-040 CHIP-TR,DTA114EKA 89-333-266-080 CHIP TR,2SC3326BMAIN C.B C901 87-010-759-080 C-CAP,U, 0.1-25F C902 87-A12-061-080 CAP,E 47-10 SMG C903 87-012-274-080 CHIP CAP,U 1000P-50B C904 87-010-759-080 C-CAP,U, 0.1-25F C905 87-A12-061-080 CAP,E 47-10 SMG C906 87-012-274-080 CHIP CAP,U 1000P-50B C907 87-010-759-080 C-CAP,U, 0.1-25F C908 87-012-195-080 C-CAP,U 100P-50CH C911 87-A12-064-080 CAP,E 1000-10 SMG C913 87-012-197-080 C-CAP,U 150P-50 J CH C914 87-012-197-080 C-CAP,U 150P-50 J CH C915 87-010-757-080 C-CAP,U 0.047-25 Z F CN901 87-A61-580-010 CONN,18P V WHT 52328 CN902 87-A60-423-010 CONN,14P V TOC-B CN903 87-A60-422-010 CONN,8P V TOC-B CN904 87-A60-586-010 CONN,4P V FE FB909 87-A50-189-080 C-COIL,S BLM21B272S FC902 8Z-CC3-607-010 FF-CABLE,14P 1.0 100MM FC903 8Z-CC3-608-010 FF-CABLE,8P 1.0 100MM JR902 87-005-840-080 C-COIL,S BLM21A108 8AResistor CodeChip Resistor Part CodingFigureValue of resistorChip resistorWattageTypeTolerance1/16W1/10W1/8W1608212532165%5%5%CJCJCJFormLWt1.60.80.4521.250.453.21.6108118128 : A : ACHIP RESISTOR PART CODE0.55Resistor CodeDimensions (mm)Symbol1/16W10055%CJ1.00.50.35104LtWFRONT C.B CN905 87-A60-586-010 CONN,4P V FE CNA908 88-805-020-640 CONN ASSY,2P 60MM CNA909 88-805-021-090 CONN ASSY,2P FC905 88-904-261-110 FF-CABLE,4P 1.25 260MM S901 87-A90-696-080 SW,TACT TS2103-03-430 S902 87-A90-696-080 SW,TACT TS2103-03-430 S903 87-A90-696-080 SW,TACT TS2103-03-430 S904 87-A90-696-080 SW,TACT TS2103-03-430 S905 87-A90-696-080 SW,TACT TS2103-03-430 S906 87-A90-696-080 SW,TACT TS2103-03-430 S907 87-A90-696-080 SW,TACT TS2103-03-430 S908 87-A90-696-080 SW,TACT TS2103-03-430 S909 87-A90-696-080 SW,TACT TS2103-03-430 S910 87-A90-696-080 SW,TACT TS2103-03-430 S911 87-A90-696-080 SW,TACT TS2103-03-430 S912 87-A90-696-080 SW,TACT TS2103-03-430LED-L C.B C910 87-012-286-080 CAP, U 0.01-25 CN907 87-A60-619-010 CONN,2P V 2MM JMT D901 87-A40-640-010 LED,SELU1E10CXM BLUE-EFLED-R C.B C909 87-012-286-080 CAP, U 0.01-25 CN906 87-A60-619-010 CONN,2P V 2MM JMT D902 87-A40-640-010 LED,SELU1E10CXM BLUE-EFDESCRIPTIONREF. NO.KANRINO.PART NO.DESCRIPTIONREF. NO.KANRINO.PART NO.RadioFans.CN 收音机爱 好者资料库 5 TRANSISTOR ILLUSTRATIONEBC2SC3326BDTA114EKAKRA102SKRC107SSGD2SK2158RadioFans.CN 收音机爱 好者资料库WIRING (MAIN / FRONT / LED L / LED R)3231302928272625242322212019181716151413121110987654321 6 ABCDEFGHIJKLMNOPQRSTURadioFans.CN 收音机爱 好者资料库 7 SCHEMATIC DIAGRAM (MAIN / FRONT / LED L / LED R)RadioFans.CN 收音机爱 好者资料库 8 MD TEST MODEThe following shows the contents of the test mode.1.How to Activate MD Test Mode2.MD Test Mode and Audio Output Check3.How to Cancel MD Test Mode4.How to Change to Servo Standby Mode5.Sled Feed Operation Check6.Laser Power Check7.Loading Mechanism Operation and Detection Switch Check8.Servo Operation Check8-1 Focus Search/Spindle Kick Check 18-2 Focus Search/Spindle Kick Check 2 (S curve check)8-3 Focus Servo and Sled Error (EF Balance) Check8-4 All Servo On Check9.Address, Error Rate Check10. How to Erase U-TOC (User TOC)1. How to Activate MD Test ModeWhile pressing and holding the “PLAY” button on the MD section, insert the AC plug into the outlet.* Notes: 1) The button operation in test mode is basically performed at MD section but it can also be done at TUNER section, AMP section andCD section. The remote controller is also required for the adjustments.2) During test mode activation, perform the operation and any mechanical error is ignored. If an unusual error occurs in the operation,switch off the power immediately.3) During test mode operation, normal recording/playback will not be working.2. MD Test Mode and Audio Output Check1) After activating test mode, the display will be as shown in the diagram below, indicating that test mode can be used.2) Audio Output CheckThe signal of 1kHz, 17dB (140mV) is the output from the MD mechanical output (D/A OUT).(It cannot output from the speaker output and headphone output.)3. How to Cancel MD Test Mode1) Press the “MD EJECT” button and take out the DISC.2) Remove the AC plug.* Note: If the MD test mode is cancelled without using the above steps, the unit may not be able to operate properly when power is switched onagain. If this occurs, remove the AC plug.4. How to Change to Servo Standby ModeAfter activating the test mode, press the “STOP” button to change to Servo Standby mode.Various modes are able to switch from this mode (display shows “ALL SV OFF”).Press the “STOP” button in each mode operation to return to “ALL SV OFF” that is returns to the original display.5. Sled Feed Operation CheckIn “ALL SV OFF”, press the “B.SKIP” or “F.SKIP” button to move the lens and PICK UP to outer or inner track respectively.PICK UP moves to the inner most track and the “JAZZ” lights up when “INSIDE LIMIT SW” is pressed.* Make sure that checking is in loading mode because the range of movement allowable for PICK UP is restricted when unloading. PICK UP moves to outer track.PICK UP moves to inner trackRadioFans.CN 收音机爱 好者资料库 9 6. Laser Power Check1) IN “ALL SV OFF”, laser power status changes each time the “MD EDIT/REC” button is pressed. The display changes as shown in thefollowing diagrams.“ALL SV OFF”: Laser Off“LASER READ”: Laser Read Power (approximately 0.68mW)“ LASER 1/2”: Laser 1/2 Read Power (approximately 0.34mW)“LASER WRITE”: Laser Write Power (approximately 6.8mW)2) After checking, press “STOP” or “MD EDIT/REC” button to return to “ALL SV OFF” display.7. Loading Mechanism Operation and Detection Switch Check7-1 Loading Mechanism Operation CheckIn “ALL SV OFF”, insert the MO DISC, press the “NORMAL” button of CDMD SYNC REC or “MD EJECT” button to UP/DOWNthe OWH.CDMD SYNC REC “NORMAL” button: OWH DOWN (during loading)“MD EJECT” button: OWH UP (during loading)/unloadingThere is no change in the display.* Cautions: 1) When a pre-mastered disc such as test disc (TGYS-1) or soft disc is inserted, do not press DOWN for OWH.2) When unloading, do not press the “CD MD SYNCHRO REC NORMAL” button. Damage may be occurred.7-2 Detection Switch CheckREFLECT SW, REC PROTECT SW, INSIDE LIMIT SW, Disc Mode (PIT, MO) selections will be shown on the display.“JAZZ” is lit:INSIDE LIMIT SW is turned on.PICK-UP is in inner most track position.“POP” is lit :REFLECT SW is turned on.When a high reflectivity DISC is inserted (such as TEST DISC).“ROCK” is lit: REC PROTECT SW is turned on.When MO DISC is inserted (REC PROTECT).“TIME MARK” is lit: DISC MODE PIT selection.“AUTO MARK” is lit: DISC MODE GRV selection.8. Servo Operation Check8-1 Focus Search/Spindle Kick Check 11) In “ALL SV OFF” with no DISC inserted, press the “PLAY” button to change to focus search and spindle kick modes. “FOCUS SRCH”appears on the display.2) After the checking, press “STOP” button to return to “ALL SV OFF” display.RadioFans.CN 收音机爱 好者资料库 10 8-2 Focus Search/Spindle Kick Check 2 (S curve check)1) In “ALL SV OFF”, press the “BAND” button on tuner section to change to focus search and spindle kick modes. At this time, “FOCUSCHECK” appears on the display. This mode can operate repeatedly regardless of DISC existence and S curve can be checked with DISC inthis mode.2) After checking, press the “STOP” button to return to “ALL SV OFF” display.8-3 Focus Servo and Sled Error (EF Balance) Check1) Insert the DISC.2) Press the “MD MODE” button to choose the DISC mode as shown in the following. PIT DISC: Display shows “SELECT PIT” MO DISC: Display shows “SELECT GRV”3) Press the “PLAY” button.During normal focus search, the display shows “FOCUS SRCH” followed by “FOCUS ON!” which indicates that focus search is turned on.4) In “FOCUS ON!”, press the “DISPLAY” button on tuner section to show “S.ERR = *” on the display. This mode can check on DC offset ofEF balance.S.ERR: Sled Error (EF balance, DC offset)It is normal if it changes in a range of 70-89 where 80 is the centre.5) After checking, press the “STOP” button to return to “ALL SV OFF” display.8-4 All Servo On Check1) In “FOCUS ON!” mode, press the “ENTER” button on amp section to turn on tracking sled servo and all the servo are activated.If all the servo are normal, the display will show “ALL SV ON”.2) After checking, press the “STOP” button to return to “ALL SV OFF” display.RadioFans.CN 收音机爱 好者资料库 11 9. Address, Error Rate Check1) In “ALL SV ON” mode, press the “DISPLAY” button on tuner section to check for the address and error rate.Address Display: displays the address read by All Servo OnError Rate Display: displays the 4 digits on the left as error rate(digits below 0030 is normal)Focus Bias: Fixed at “FBIAS = 00”2) Refer to the adjustment section for checking the recording/playback error.10. How to Erase U-TOC (User TOC)Make the DISC that appears on display from “U-TOC ERROR” to “BLANK DISC”.1)Insert the MO DISC.2)Press the “MD MODE” button to change the display to “SELECT GRV”.3)Move the PICK UP to the centre position of the DISC with “B.SKIP” or “F.SKIP” button.4)Press the “PLAY” button to change the display to “FOCUS ON!”.5) Press the “ENTER” button on the AMP section to change the display to “ALL SV ON”6) Press the “JOG MODE” button on the AMP section and the display becomes “UTOC ERASE”.7) U-TOC is erased when “ALL SV OFF” appears on the display.RadioFans.CN 收音机爱 好者资料库 12 MD Electrical AdjustmentPerform all MD block adjustments and checking in test mode.When “NO ADJUST” appears on the display, perform all the adjustments.Measuring Device and ToolsAttached Remote ControllerTemperature indicator (Degree Celsius), Laser Power meter (available to measure up to 10mW)Test DISC: TGYS-1 or TDYS-1 (or soft disc), MDW-74 (or similar product)Before AdjustmentUse a DISC that is not scratched or contaminated for the adjustment.(The adjustment may not be able to be performed if the DISC is scratched or contaminated.)During adjustment, do not reverse the MD mechanism or place it in a slanting position.Adjustment ProcedureAll the adjustment procedures are listed in the flow chart below.Follow 1 to 7 of the flow chart for the adjustment procedure.Adjustment ProcedureSTART1Activate TEST MODE2EEPROM Initialisation3Temperature CompensationAdjustment4Laser Power Check5AUTO SEQUENCE ADJ6Error Rate Check7After Adjustment CheckENDAbout the mark in the procedureShow button operation.ELECTRICAL ADJUSTMENTRadioFans.CN 收音机爱 好者资料库 13 START1Activate TEST MODEPress and hold the “PLAY”button on the MD section andinsert the AC plug into the outlet.2EEPROM Initialisation“OPEN/CLOSE” the CD section“STOP”To next stepAdjustment Procedure Flow ChartRadioFans.CN 收音机爱 好者资料库 14 3Temperature CompensationAdjustment“DISPLAY” on TUNER section“PAUSE”Temperature Compensation AdjustmentImportance of this adjustment isthat board temperature and roomtemperature are the same.Using the temperature indicator (Degree Celsius), comparethe surrounding temperature of the MD mechanismmeasured on the display with the temperature indicator,(temperature indicator displays 3 degree celsius) =display temperature of this unit.“ENTER” of AMP section“STOP”To next step“B.SKIP”“K.SKIP”RadioFans.CN 收音机爱 好者资料库 15 Write Power CheckPress “MD EDIT/REC” twice.“PAUSE”Write Power Setup Value CheckCheck that “LASER= 89” is displayed“ENTER” on AMP sectionWrite Power CheckMeasure with the Laser Power MeterCheck: Laser Output is approximately6.80mW“STOP”To next step4Laser Power CheckRead Power Check“MD EDIT/REC”“PAUSE”Read Power Setup Value CheckCheck that “LASER= OF” is displayed“ENTER” on AMP sectionRead Power CheckMeasure with the Laser Power MeterCheck: Laser Output is approximately0.68mWRadioFans.CN 收音机爱 好者资料库 16 MO DISC Adjustment Value Check“PLAY”“ENTER” on AMP section“STOP” Press “DISPLAY” on TUNER section twiceAdjustment Value Check (IVR, EF balance)“DISPLAY” on TUNER sectionAdjustment Value Check(Focus / Tracking / Sled Gain)“STOP”“MD EJECT”Take out the DISCTo next step5AUTO SEQUENCE ADJMO DISC AdjustmentMDW-74 (or similar product) Loading“MD MODE”AUTO MARK is