Aiwa-AMLM918-md-sm电路图 维修手册.pdf

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1、SERVICE MANUAL DATA MINI DISC RECORDERBASIC MD MECHANISM : AZG-W YAF AM-LM918Y S/M Code No. 09-016-446-9R1 REVISION 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

2、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 modulation overwrite system Rotation speedApprox. 400 to 900 rpm (CLV) Sampling frequency44.1 kHz No. of channe

3、lsStereo: 2 channels Monaural: 1 channel A/D, D/A converter1-bit Frequency20 to 20000 Hz Wow and flutterUnmeasurable AUX DIGITAL INSampling frequency: 48 kHz / 44.1 kHz / 32 kHz Optical input level: more than -21 dBm CD DIGITAL IN Dimensions (W x H x D)210 x 82.5 x 243 mm Weight1.3 kg SPECIFICATIONS

4、 Design and specifications are subject to change without notice. ACCESSORIES / PACKAGE LIST DESCRIPTIONREF. NO.KANRI NO. PART NO. 1 87-B30-024-010 CABLE,OPTICAL MC-901 1M RadioFans.CN 收音机爱 好者资料库 3 This set employs laser. Therefore, be sure to follow carefully the instructions below when servicing. W

5、ARNING! WHEN SERVICING, DO NOT APPROACH THE LASER EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION. BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 30cm FROM THE SURFACE OF THE OBJEC- TIVE LENS ON THE OPTICAL PICK-UP BLOCK. sCaution: Invisible laser radiation whe

6、n open and interlocks defeated avoid exposure to beam. sAdvarsel: Usynlig laserstling ved bning, nr sikkerhedsafbrydere er ude af funktion. Undg udsttelse for strling. VAROITUS! Laiteen Kyttminen muulla kuin tss kyttohjeessa mainitulla tavalla saataa altistaa kyt-tjn turvallisuusluokan 1 ylittvlle n

7、kymttmlle lasersteilylle. VARNING! Om apparaten anvnds p annat stt n vad som specificeras i denna bruksanvising, kan anvndaren utsttas fr osynling laserstrlning, som verskrider grnsen fr laserklass 1. PROTECTION OF EYES FROM LASER BEAM DURING SERVICING Precaution to replace Optical block (KMS-260E)

8、Body or clothes electrostatic potential could ruin laser diode in the optical block. Be sure ground body and workbench, and use care the clothes do not touch the diode. 1) After the connection, remove solder shown in right figure. CLASS 1LASER PRODUCT KLASSE 1LASER PRODUKT LUOKAN 1LASER LAITE KLASS

9、1LASER APPARAT CAUTION Use of controls or adjustments or performance of procedures other than those specified herin may result in hazardous radiation exposure. ATTENTION Lutillisation de commandes, rglages ou procdures autres que ceux spcifis peut entraner une dangereuse exposition aux radiations. A

10、DVARSEL Usynlig laserstling ved bning, nr sikkerhedsafbrydereer ude af funktion. Undg udsttelse for strling. This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the rear exterior. MD PICK-UP Assy PWB 1 VEE TRK Pattern side Solder 1 - 4 ELE

11、CTRICAL MAIN PARTS LIST IC 87-A20-870-010 IC,GP1F37R 87-A21-175-040 C-IC,TC74VHC14FT TRANSISTOR 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,2SC3326B MAIN C.B C901 87-010-759-080 C-CAP,U, 0.1-25F C902 87-

12、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

13、 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

14、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 BLM21A10 8 8 A Resistor Code Chip Resistor Part Coding Figure Value of resistor Chip resistor WattageTypeTolerance 1/16W 1/10W 1/8W 1608 2125 3216 5% 5% 5% CJ CJ CJ FormLWt

15、 1.60.80.45 21.250.45 3.21.6 108 118 128 : A : A CHIP RESISTOR PART CODE 0.55 Resistor Code Dimensions (mm) Symbol 1/16W10055%CJ1.00.50.35104 L t W FRONT 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

16、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

17、-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 TS2103-03-430 LED-L C.B C910 87-012-286-080 CAP, U 0.01-25 CN907 87-A60-619-010 CONN,2P V 2MM JMT D

18、901 87-A40-640-010 LED,SELU1E10CXM BLUE-EF LED-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-EF DESCRIPTIONREF. NO.KANRI NO. PART NO.DESCRIPTIONREF. NO.KANRI NO. PART NO. 5 TRANSISTOR ILLUSTRATION E B C 2SC3326B DTA114EKA KRA

19、102S KRC107S S G D 2SK2158 WIRING (MAIN / FRONT / LED L / LED R) 3231302928272625242322212019181716151413121110987654321 6 A B C D E F G H I J K L M N O P Q R S T U 7 SCHEMATIC DIAGRAM (MAIN / FRONT / LED L / LED R) 8 MD TEST MODE The following shows the contents of the test mode. 1.How to Activate

20、MD Test Mode 2.MD Test Mode and Audio Output Check 3.How to Cancel MD Test Mode 4.How to Change to Servo Standby Mode 5.Sled Feed Operation Check 6.Laser Power Check 7.Loading Mechanism Operation and Detection Switch Check 8.Servo Operation Check 8-1 Focus Search/Spindle Kick Check 1 8-2 Focus Searc

21、h/Spindle Kick Check 2 (S curve check) 8-3 Focus Servo and Sled Error (EF Balance) Check 8-4 All Servo On Check 9.Address, Error Rate Check 10. How to Erase U-TOC (User TOC) 1. How to Activate MD Test Mode While pressing and holding the “PLAY” button on the MD section, insert the AC plug into the ou

22、tlet. * 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 and CD section. The remote controller is also required for the adjustments. 2) During test mode activation, perform the operation and any mechanical error is

23、 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 Check 1) After activating test mode, the display will be as shown in the diagram below, indicating t

24、hat test mode can be used. 2) Audio Output Check The 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 Mode 1) Press the “MD EJECT” button and take out the DISC. 2) Remove the

25、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 on again. If this occurs, remove the AC plug. 4. How to Change to Servo Standby Mode After activating the test mode, press the “STOP” button to change

26、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 Check In “ALL SV OFF”, press the “B.SKIP” or “F.SKIP” button t

27、o 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 m

28、oves to outer track.PICK UP moves to inner track 9 6. Laser Power Check 1) IN “ALL SV OFF”, laser power status changes each time the “MD EDIT/REC” button is pressed. The display changes as shown in the following diagrams. “ALL SV OFF”: Laser Off “LASER READ”: Laser Read Power (approximately 0.68mW)

29、“ 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 Check 7-1 Loading Mechanism Operation Check

30、In “ALL SV OFF”, insert the MO DISC, press the “NORMAL” button of CDMD SYNC REC or “MD EJECT” button to UP/DOWN the OWH. CDMD SYNC REC “NORMAL” button: OWH DOWN (during loading) “MD EJECT” button: OWH UP (during loading)/unloading There is no change in the display. * Cautions: 1) When a pre-mastered

31、 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 Check REFLECT SW, REC PROTECT SW, INSIDE LIMIT SW, Disc Mode (PIT, MO) selections will be shown on

32、 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

33、lit: DISC MODE PIT selection. “AUTO MARK” is lit: DISC MODE GRV selection. 8. Servo Operation Check 8-1 Focus Search/Spindle Kick Check 1 1) 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

34、the checking, press “STOP” button to return to “ALL SV OFF” display. 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, “FOCUS CHECK” appears on the display. This mode c

35、an operate repeatedly regardless of DISC existence and S curve can be checked with DISC in this mode. 2) After checking, press the “STOP” button to return to “ALL SV OFF” display. 8-3 Focus Servo and Sled Error (EF Balance) Check 1) Insert the DISC. 2) Press the “MD MODE” button to choose the DISC m

36、ode 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

37、” button on tuner section to show “S.ERR = *” on the display. This mode can check on DC offset of EF 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.

38、 8-4 All Servo On Check 1) 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. 11 9.

39、Address, Error Rate Check 1) 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 On Error Rate Display: displays the 4 digits on the left as error rate (digits below 0030 is normal) Focus Bi

40、as: 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”

41、. 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 disp

42、lay becomes “UTOC ERASE”. 7) U-TOC is erased when “ALL SV OFF” appears on the display. 12 MD Electrical Adjustment Perform all MD block adjustments and checking in test mode. When “NO ADJUST” appears on the display, perform all the adjustments. Measuring Device and Tools Attached Remote Controller T

43、emperature 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 Adjustment Use a DISC that is not scratched or contaminated for the adjustment. (The adjustment may not be able to be performed if

44、 the DISC is scratched or contaminated.) During adjustment, do not reverse the MD mechanism or place it in a slanting position. Adjustment Procedure All the adjustment procedures are listed in the flow chart below. Follow 1 to 7 of the flow chart for the adjustment procedure. Adjustment Procedure ST

45、ART 1 Activate TEST MODE 2EEPROM Initialisation 3 Temperature Compensation Adjustment 4 Laser Power Check 5 AUTO SEQUENCE ADJ 6 Error Rate Check 7 After Adjustment Check END About the mark in the procedure Show button operation. ELECTRICAL ADJUSTMENT 13 START 1 Activate TEST MODE Press and hold the

46、“PLAY” button on the MD section and insert the AC plug into the outlet. 2 EEPROM Initialisation “OPEN/CLOSE” the CD section “STOP” To next step Adjustment Procedure Flow Chart 14 3 Temperature Compensation Adjustment “DISPLAY” on TUNER section “PAUSE” Temperature Compensation Adjustment Importance o

47、f this adjustment is that board temperature and room temperature are the same. Using the temperature indicator (Degree Celsius), compare the surrounding temperature of the MD mechanism measured on the display with the temperature indicator, (temperature indicator displays 3 degree celsius) = display

48、 temperature of this unit. “ENTER” of AMP section “STOP” To next step “B.SKIP”“K.SKIP” 15 Write Power Check Press “MD EDIT/REC” twice. “PAUSE” Write Power Setup Value Check Check that “LASER= 89” is displayed “ENTER” on AMP section Write Power Check Measure with the Laser Power Meter Check: Laser Ou

49、tput is approximately 6.80mW “STOP” To next step 4 Laser Power Check Read Power Check “MD EDIT/REC” “PAUSE” Read Power Setup Value Check Check that “LASER= OF” is displayed “ENTER” on AMP section Read Power Check Measure with the Laser Power Meter Check: Laser Output is approximately 0.68mW 16 MO DISC Adjustment Value Check “PLAY” “ENTER” on AMP