Text preview for : sony_HMC-NX5MD_service_manual.pdf part of Sony HMC-NX5MD HMC-NX5MD CD player and MiniDisc
MINI Hi-Fi COMPONENT SYSTEM
Service Manual
Back to : sony_HMC-NX5MD_service_ma | Home
HMC-NX5MD
SERVICE MANUAL
AEP Model UK Model E Model
HMC-NX5MD is the CD player and MD Deck section in DHC-NX5MD
Model Name Using Similar Mechanism CD Section CD Mechanism Type Base Unit Name Type Optical Pick-up Name Model Name Using Similar Mechanism MD Section MD Mechanism Type Optical Pick-up Name
NEW CDM53E-K4BD40 BU-K4BD40 KSM-213DHAP/Z-NP NEW MDM-7B KMS-260B/J1N
SPECIFICATIONS
CD player section
System Laser Compact disc and digital audio system Semiconductor laser (=780 nm) Emission duration: continuous Max. 44.6 µW* *This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. 780 790 nm 20 Hz 20 kHz (±0.5 dB) More than 90 dB More than 90 dB
General
Power requirements European models: Other models: 230 V AC, 50/60 Hz 120 V, 220 V or 230 240 V AC, 50/60 Hz Adjustable with voltage selector
Laser output
Power consumption European models: Other models: Dimensions (w/h/d) Mass Supplied accessories:
190 watts 220 watts Approx. 225 × 202 × 356 mm Approx. 4.3 kg AM loop aerial (1) Remote Commander (1) Batteries (2) FM lead aerial (1) Speaker cords (2) Front speaker pads (8)
Wavelength Frequency response Signal-to-noise ratio Dynamic range
MD deck section
System Laser MiniDisc digital audio system Semiconductor laser (=780 nm) Emission duration: continuous Max. 44.6 µW* *This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. 44.1 kHz 20 Hz 20 kHz
Laser output
Design and specifications are subject to change without notice.
Sampling frequency Frequency response
MINI Hi-Fi COMPONENT SYSTEM
1
SELF-DIAGNOSIS FUNCTION
The self-diagnosis function consists of error codes for customers which are displayed automatically when errors occur, and error codes which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following "Procedure for using the SelfDiagnosis Function (Error History Display Mode)".
Self-diagnosis Display
This system has a Self-diagnosis display function to let you know if there is a system malfunction. The display shows a code made up of three or five letters and a message alternately to show you the problem. To solve the problem refer to the following list. If any problem persists, consult your nearest Sony dealer.
C13/REC Error Recording could not be performed properly. cMove the system to a stable place, and start recording over from the beginning. The MD is dirty or scratched, or the MD does not meet the standards. cReplace the MD and start recording over from the beginning. C13/Read Error The MD deck cannot read the disc information properly. cRemove the MD once, then insert it again. C14/Toc Error The MD deck cannot read the disc information properly. cReplace the MD. cErase all the recorded contents of the MD using the All Erase function on page 44.
E0101/LASER NG There is a problem with the optical pickup. cThe optical pickup may have failed. Consult your nearest Sony dealer.
Messages
One of the following messages may appear or flash in the display during operation.
MD
Auto Cut The MD deck is pausing the recording because silence continued for about 30 seconds or more during digital recording. Blank Disc The inserted recordable MD is new, or all tracks on the MD have been erased. Cannot Edit · A pre-mastered MD is in the deck. · You tried to edit during Programme or Shuffle Play. · You tried to change the recorded level or perform Fade-in or Fade-out operation after the Daily Timer or Recording Timer had activated and turned on the power. Cannot REC The function is switched to MD. Complete! The editing operation of MDs is completed.
C11/Protected The MD is protected against erasure. cRemove the MD and slide the tab to close the slot (page 27). C12/Cannot Copy You tried to record a CD or MD with a format that the system does not support, such as a CDROM. cRemove the disc and turn off the system once, then turn it on again.
C41/Cannot Copy The sound source is a copy of a commercially available music software, or you tried to record a CD-R (Recordable CD). cThe Serial Copy Management System prevents making a digital copy (see page 71). You cannot record a CD-R. E0001/MEMORY NG There is an error in the internal data that the system needs in order to operate. cConsult your nearest Sony dealer.
Procedure for using the Self-Diagnosis Function (Error History Display Mode). Note: Perform the self-diagnosis function in the "error history display mode" in the test mode. The following describes the least required procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO button to exit the mode.
Table of Error Codes
Error Code 10 12 20 21 22 23 24 30 31 40 41 42 43 50 51 Could not load Loading switches combined incorrectly Timed out without reading the top of PTOC Could read top of PTOC, but detected error Timed out without accessing UTOC Timed out without reading UTOC Error in UTOC Could not start playback Error in sector Retry cause generated during normal recording Retried in DRAM overflow Retry occurred during TOC writing Retry aborted during S.F editing Other than access processing, and could not read address. Focus NG occurred and overran. Description
2
1. Clicking the ENTER/YES button and the A (DISC 5) button while clicking the m (MD) button causes the program to enter test mode and the message "Check" to be displayed on screen. 2. Rotate the MD JOG knob and when "[Service]" is displayed, press the ENTER/YES button. 3. Rotate the MD JOG knob and display "Err Display". 4. Pressing the ENTER/YES button sets the error history mode and displays "op rec tm". 5. Select the contents to be displayed or executed using the MD JOG knob. 6. Pressing the MD JOG knob will display or execute the contents selected. 7. Pressing the MD JOG knob another time returns to step 4. 8. Pressing the MENU/NO button displays "Err Display" and exits the error history mode. 9. To exit from test mode, enter MD mode and click the STR REPEAT button. The program will enter standby mode and then exit test mode.
ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS
Selecting the Test Mode Display op rec tm History Displays the total recording time. When the total recording time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" The display time is the time the laser is set to high power, which is about 1/4 of the actual recording time. Displays the total playback time. When the total playback time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" Displays the total rotating time of the spindle motor. When the total rotating time is more than 1 minute, displays the hour and minute When less than 1 minute, displays "Under 1 min" Displays the total number of retry errors during recording and playback Displays "r xx p yy". xx is the number of errors during recording. yy is the number of errors during playback. This is displayed in hexadecimal from 00 to FF. Displays the total number of errors Displays "total xx". This is displayed in hexadecimal from 00 to FF. Displays the past ten errors. Displays "0x ErrCd@@". X is the history number. The younger the number, the more recent is the history (00 is the latest). @@ is the error code. Select the error history number using the AMS knob. Displays the past five retry addresses. Displays "xx ADRS yyyy", xx is the history number, yyyy is the cluster with the retry error. Select the error history number using the AMS knob. Mode for erasing the error and retry address histories Procedure 1. Press the AMS knob when displayed as "er refresh". 2. Press the YES button when the display changes to "er refresh?". When "complete!" is displayed, it means erasure has completed. Be sure to check the following after executing this mode. *Data has been erased. *Perform recording and playback, and check that the mechanism is normal. Mode for erasing the total time of op rec tm, op play tm. These histories are based on the time of replacement of the optical pick-up. If the optical pick-up has been replaced, perform this procedure and erase the history. Procedure 1. Press the AMS knob when displayed as "op change". 2. Press the YES button when the display changes to "op change?". When "Complete!" is displayed, it means erasure has completed. Mode for erasing the total spdl rp tm time These histories are based on the time of replacement of the spindle motor. If the spindle motor has been replaced, perform this procedure and erase the history. Procedure 1. Press the AMS knob when displayed as "spdl change" 2. Press the YES button when the display changes to "spdl change?" When "Complete!" is displayed, it means erasure has completed.
op play tm
spdl rp tm
retry err
total err
err history
retry adrs
er refresh
op change
spdl change
3
TABLE OF CONTENTS 1. SERVICING NOTES ......................................................... 4 2. GENERAL .......................................................................... 12 3. DISASSEMBLY
3-1. Case ..................................................................................... 13 3-2. Front Panel Section ............................................................. 13 3-3. CD Mechanism Deck Section ............................................. 14 3-4. MD Mechanism Deck Block ............................................... 14 3-5. CD Base Unit ...................................................................... 15 3-6. Main Board ......................................................................... 15 3-7. Fitting Base (Guide) Assy, Bracket (Chassis) and Magnet Assy ....................................................................... 16 3-8. Tray (Sub) ........................................................................... 16 3-9. Chassis (Mold B) Section, Stocker Section and Slider (Selection) ................................................................ 17 3-10. Gears Installation .............................................................. 17 3-11. Slider (Selection) Installation ............................................ 18 3-12. Stocker Section Installation ............................................... 18 3-13. Chassis (Mold B) Section Installation .............................. 19 3-14. MD Mechanism Deck Section .......................................... 19 3-15. BD (MD) Board ................................................................ 20
SECTION 1 SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. FOR CD NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens. FOR MD NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.
4. TEST MODE ...................................................................... 21 5. ELECTRICAL ADJUSTMENT .................................... 27 6. DIAGRAMS
6-1. Circuit Boards Location ...................................................... 39 6-2. Block Diagrams ................................................................... 41 6-3. Schematic Diagram CD Section .................................... 44 6-4. Printed Wiring Board CD Section ................................. 45 6-5. Printed Wiring Board MD Section ................................ 46 6-6. Schematic Diagram MD Section (1/2) .......................... 47 6-7. Schematic Diagram MD Section (2/2) .......................... 48 6-8. Schematic Diagram Main Section (1/2) ........................ 49 6-9. Schematic Diagram Main Section (2/2) ........................ 50 6-10. Printed Wiring Board Main Section ............................ 51 6-11. Schematic Diagram Digital Section ............................ 52 6-12. Printed Wiring Board Digital Section ......................... 53 6-13. Schematic Diagram Panel Section .............................. 54 6-14. Printed Wiring Board Panel Section ............................ 55 6-15. Schematic Diagram CD Mechanism Section .............. 56 6-16. Printed Wiring Board CD Mechanism Section ........... 57 6-17. IC Block Diagrams ............................................................ 58 6-18. IC Pin Function ................................................................. 62
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit.
7. EXPLODED VIEW
7-1. Case, Chassis Section ......................................................... 71 7-2. Front Panel Section ............................................................. 72 7-3. CD Mechanism Deck Section-1 .......................................... 73 7-4. CD Mechanism Deck Section-2 .......................................... 74 7-5. CD Base Unit Section ......................................................... 75 7-6. MD Mechanism Section-1 .................................................. 76 7-7. MD Mechanism Section-2 .................................................. 77
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of soldering iron around 270°C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering.
8. ELECTRICAL PARTS LIST ........................................ 78
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
4
POWER SUPPLY DURING SERVICING
· As this set has not own power supply, it does not operate independently. Therefore, during servicing, connect it to the Pre-Main amplifier and Tuner Unit (STR-NX5MD) of DHC-NX5MD.
SYSTEM CONTROL terminal
Connection:
Connector cable (17P) of attachment to power feed jig Relay connector jig (J-2501-197-A)
Power feed jig (PFJ-1) CDP/MD
Set
SYSTEM CONTROL terminal Pre-Main AMP and Tuner Unit Connector cable (19P)
ST
CN101 (19P) SYSTEM CONTROL terminal
P707, P909
Set
AC IN
system cable Exclusive cable (15P)
If STR-NX5MD are not available, use the Power Feed Jig (PFJ1) and Relay Connector Jig. In this case, after turn on the POWER switch on the Power Feed Jig, supply power with the following methods. Procedure: 1. Press three buttons of G (MD), A (DISC 1), and s (CD) simultaneously. function CD AMS AMS + FR FF MD AMS AMS + FR FF AMS AMS + m M AMS AMS + m M button
5
OPTICAL PICK-UP CLEANING
1 Remove the case. (Refer to disassembly page 13)
3 Open the magnet assy.
4 Cleaning the optical pick-up.
2 four screws (BVTP M2.6)
Note 1: In cleaning the lens, do not apply an excessive force. As the optical pick-up is vulnerable, application of excessive force could damage the lens holder. Note 2: In cleaning, do not use a cleaner other than exclusive cleaning liquid (KK-91 or isopropyl alcohol). Note 3: Wipe the objective lens spirally from center toward outside. (See Figure A)
(Figure A)
6
JIG FOR CHECKING BD (MD) BOARD WAVEFORM
The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. The names of terminals and the checking items to be performed are shown as follows. GND I+3V IOP TE VC RF FE : Ground : For measuring IOP (Check the deterioration of the optical pick-up laser) : For measuring IOP (Check the deterioration of the optical pick-up laser) : TRK error signal (Traverse adjustment) : Reference level for checking the signal : RF signal (Check jitter) : Focus error signal
CN105
IOP TE I+3V GND FE VC RF
1 I+3V IOP GND TE FE VC RF 7 I+3V IOP GND TE FE VC RF
for MDM-7B
7
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD BOARD) ARE REPLACED
The Iop value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD board), record the Iop value on the optical pick-up according to the following procedure. Record Precedure: 1. Clicking the ENTER/YES button and the A (DISC 5) button while clicking the m (MD) button causes the program to enter test mode and the message "Check" to be displayed on screen. 2. Rotate the MD JOG knob to display "[Service]", and press the ENTER/YES button. 3. Rotate the MD JOG knob to display "Iop Write" (C05), and press the ENTER/YES button. 4. The display becomes "Ref=@@@.@" (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the Iop value written on the optical pick-up. To select the number : Rotate the MD JOG knob. To select the digit : Press the MD JOG knob. 6. When the ENTER/YES button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the ENTER/YES button. 8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write" (C05). 9. Press the STR REPEAT button to complete. Display Precedure: 1. Clicking the ENTER/YES button and the A (DISC 5) button while clicking the m (MD) button causes the program to enter test mode and the message "Check" to be displayed on screen. 2. Rotate the MD JOG knob to display "[Service]", and press the ENTER/YES button. 3. Rotate the MD JOG knob to display "Iop Read" (C26). 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the pick-up. ##.# : indicates the Iop value after adjustment 5. To end, press the MD JOG button or MENU/NO button to display "Iop Read" (C26). Then press the REPEAT button.
8
CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS
Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in "5 Electrical Adjustments". · 5-6-2. Laser power check (see page 31) · 5-6-3. Iop Compare (see page 31) · 5-6-4. Auto Check (see page 32) Note: The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.
9
RETRY CAUSE DISPLAY MODE
· In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. During playback, the "track mode" for obtaining track information will be set. This is useful for locating the faulty part of the unit. · The following will be displayed : During recording and stop : Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal. Procedure: 1. Press the ENTER/YES button while pressing the A (DISC 5) button and NAME EDIT/CHARACTER button. 2. Press the REC/RECIT button to start recording. Then press the X button and start recording. 3. To check the "track mode", press the H button to start play. 4. To exit the test mode, press the @/1 button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the outlet.
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c*** Fluorescent display tube display @@ : Cause of retry ## : Number of retries *** : Number of retry errors
Fig. 2 Reading the Test Mode Display (During playback)
@@####**$$ Fluorescent display tube display @@ ## ** $$ : : : : Parts No. (name of area named on TOC) Cluster } Address (Physical address on disc) Sector Track mode (Track information such as copyright information of each part)
Reading the Retry Cause Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 Lower Bits 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0
Hexadecimal 01 02 04 08 10 20 40 80
Cause of Retry shock ader5
Occurring conditions When track jump (shock) is detected When ADER was counted more than five times continuously When DIN unlock is detected When not in focus When ABCD signal level exceeds the specified range When CLV is unlocked When access operation is not performed normally
b7 b6 b5 b4 b3 b2 b1 b0
Discontinuous address When ADIP address is not continuous DIN unlock FCS incorrect IVR rec error CLV unlock Access fault
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 42 is displayed: Higher bit : 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of "CLV unlock" and "ader5". When A2 is displayed: Higher bit : A = 1010 t b7+b5 Lower bit : 2 = 0010 t b1 The retry cause in this case is combined of "Access fault", "IVR rec error", and "ader5".
10
Reading the Track Mode Display Higher Bits Hexadecimal 8 Bit Binary 0 0 0 0 0 0 0 1 4 0 0 0 0 0 0 1 0 2 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 Lower Bits 8 0 0 0 1 0 0 0 0 4 0 0 1 0 0 0 0 0 2 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 Hexadecimal 01 02 04 08 10 20 40 80 When 0 Emphasis OFF Monaural This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid Audio (Normal) Original Copyright Write prohibited Invalid Digital copy No copyright Write allowed Emphasis ON Stereo Details When 1
b7 b6 b5 b4 b3 b2 b1 b0
Reading the Display: Convert the hexadecimal display into binary display. If more than two causes, they will be added. Example When 84 is displayed: Higher bit : 8 = 1000 t b7 Lower bit : 4 = 0100 t b2 In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of "Emphasis OFF", "Monaural", "Original", "Copyright exists", and "Write allowed". Example When 07 is displayed: Higher bit : 0 = 1000 t All 0 Lower bit : 7 = 0111 t b0+b1+b2 In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of "Emphasis ON", "Stereo", "Original", "Copyright exists", and "Write prohibited".
Hexadecimal t Binary Conversion Table
Hexadecimal 0 1 2 3 4 5 6 7 Binary 0000 0001 0010 0011 0100 0101 0110 0111 Hexadecimal 8 9 A B C D E F Binary 1000 1001 1010 1011 1100 1101 1110 1111
11
SECTION 2 GENERAL
· LOCATION OF CONTROLS Front Panel
1 2 3 4 5
1 G (CD) button 2 S (CD) button 3 s (CD) button 4 DISC 1 to 5 (CD) button and indicator 5 A (CD DISC 1 to 5) button
wg wf wd ws wa
6 A (MD) button 7 m (MD) button
6 7 8 9 q; qa qs
8 M (MD) button 9 NAME EDIT/CHARACTER button q; CLEAR button qa MENU/NO button qs ENTER/YES button qd . MD JOG > +/ dial qf S.F EDIT button qg REC MODE button
w;
ql
qkqjqh
qg
qf
qd
qh HIGH SPEED button qj Display window qk NORMAL button ql REC/REC IT button w; MD DISPLAY button wa MD disc compartment ws G (MD) button wd S (MD) button wf s (MD) button wg CD disc tray
12
SECTION 3 DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
3-1. CASE
A 1 screw (BVTP3 × 10)
2 two screws (case 3 TP2)
3 Remove the case in the arrow A direction.
2 two screws (case 3 TP2)
3-2. FRONT PANEL SECTION
3 two screws (SUMITITE (B3), +BV) 5 screw (BVTP3 × 10) 4 screw (BVTP2.6 × 8) 1 flat cable (13 core) (CN103)
4 screw (BVTP2.6 × 8) 2 flat cable (9 core) (CN102)
7 front panel section 6 two screws (BVTP3 × 10)
13
3-3. CD MECHANISM DECK SECTION (CDM53E-K4BD40)
5 Remove the CD mechanism deck section (CDM53E-K4BD40) in the arrow A direction. 4 four screws (BVTP3 × 10)
A
1 flat cable (17 core) (CN112)
3 connector (CN713) 2 flat cable (19 core) (CN111)
3-4. MD MECHANISM DECK BLOCK
2 screw (BVTP3 × 8)
3 MD mechanism deck block
1 flat cable (25 core) (CN114)
14
3-5. CD BASE UNIT (BU-K4BD40)
4 CD base unit (BU-K4BD40)
3 two compression springs (black)
2 two compression springs (silver)
1 two screws (PTPWH M2.6)
1 two screws (PTPWH M2.6)
3-6. MAIN BOARD
6 Remove the MAIN board in the arrow A direction.
4 three screws (BVTP3 × 8)
3 screw (BVTP3 × 10) 1 screw (BVTP3 × 10)
A
5 two PC board holders
2 connection cord (CN101)
15
3-7. FITTING BASE (GUIDE) ASSY, BRACKET (CHASSIS) AND MAGNET ASSY
7 four screws (BVTP M2.6) 2 four screws (BVTP M2.6) 4 five screws (BVTP M2.6) 5 bracket (chassis) 8 base (magnet) assy, fitting 6 connector (CN710)
3 base (guide) assy, fitting 1 two connectors (CN709, 715)
3-8. TRAY (SUB)
1 2 3 4 Rotating the pulley (LD), shift the slider (selection) in the arrow A direction. Rotating the pulley (mode) in the arrow direction, adjust the tray (sub) to be removed. Rotating the pulley (LD), shift the slider (selection) in the arrow B direction. Rotating the pulley (mode) in the arrow direction, remove the tray (sub) to be removed. slider (selection)
pulley (LD) stocker section
A B
pulley (mode)
tray (sub)
16
3-9. CHASSIS (MOLD B) SECTION, STOCKER SECTION AND SLIDER (SELECTION)
Note: In mounting the parts, refer to page 18 and 19.
6 two screws (PTPWH M2.6) 5 stocker section
7 slider (selection) 8 washer
pulley (LD)
9 compression spring
1 three screws (BVTP M2.6)
4 two step screws
2 chassis (mold B) section Note: Rotating the pulley (LD), shift the slider (selection) to the left.
4 two step screws
3 gear (eject)
3-10. GEARS INSTALLATION
3 gear (gear B) portion A
Adjust the gear (gear B) with the portion A as shown.
1 Slide the slider (U/D) fully in the arrow direction.
2 gear (U/D slider) slider (U/D) gear
4 gear (gear A) gear (gear B) linearly
Adjust the gear so that it meshes with the bottom tooth of slider (U/D)gear, as shown.
Adjust so as to be aligned with gear (B) linearly,as shown.
17
3-11. SLIDER (SELECTION) INSTALLATION
6 two screws (PTPWH M2.6) 2 gear (chuking) rotary encoder 5 washer 4 compression spring 7 Insert the slider (selection) into the portion A. portion A
Align with the slot of rotary encoder.
3 convex portion of slider (selection) gear (chuking) 1 rotary encoder
Insert a convex portion into a groove of gear (chuking). align marking
3-12. STOCKER SECTION INSTALLATION
2 portion A of tray (sub) 1 stocker section Hook the portion A of tray (sub) to the slider (selection).
potion A of tray (sub) 3 two step screws
sticking of slider (selection)
3 two step screws
18
3-13. CHASSIS (MOLD B) SECTION INSTALLATION
3 three screws (BVTP M2.6)
2 Insert the gear (eject) under the gear (LD deceleration).
portion A
1 Insert the portion A of chassis (mold B) section into the portion B of slider (selection).
gear (LD deceleration)
portion B of slider (selection)
3-14. MD MECHANISM DECK SECTION (MDM-7B)
A
1 two screws (BVTP 3 × 8)
3 cover (MD) qa two screws (BVTPWH M3), step
4 flat type wire (17core) (CN1004) 5 flat type wire (27core) (CN1003) 0 two screws (BVTPWH M3), step
qs MD mechanism deck (MDM-7B)
2 screw (BVTP 3 × 8)
7 two claws A 8 DIGITAL board 9 flat type wire (25core) (CN1001)
6 screw (BVTP 3 × 8)
19
3-15. BD (MD) BOARD
CN101 5 Connect the short land by lead wire. short land
Bottom of the optical pick-up
2 Remove the solder (Two portions) 2 Remove the solder (Two portions) 6 connector (CN101) 2 Remove the solder (Two portions) M101 M103 S102 M102
3 two screws (BTP 2 × 6)
1 connector (CN104) 4 BD (MD) board
2 Remove the solder (Three portions)
20
SECTION 4 TEST MODE
[LED All Lit, Key Check Mode] Procedure: 1. Press the ?/1 button to turn the power ON. 2. Press three buttons of G (MD), A (DISC 1), and [DISC 5] simultaneously. 3. LEDs are all turned on. Press the G (CD) button, and the key check mode is activated. 4. To release from this mode, press three buttons in the same manner as step 2, or remove the power cord. [CD Delivery Mode] · This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair. Procedure: 1. Press the ?/1 button to turn the power ON. 2. Press the G (MD) and [DISC 1] buttons simultaneously. 3. A message "LOCK" is displayed on the liquid crystal display of the STR-NX5MD, and the CD delivery mode is set. [CD/MD Test Mode] (In case of connected to the STR-NX5MD) · If connected to the STR-NX5MD, the mode also acts as the STR-NX5MD amplifer test mode. Procedure: 1. Press the ?/1 button to turn the power ON. 2. Press three buttons of [ENTER/YES] + [DEMO] and [BAND] of the STR-NX5MD simultaneously. 3. On liquid crystal display of the STR-NX5MD, the disc calendar blinks, then the function which was set before the test mode became active is displayed. [CD/MD Test Mode] (In case of connected to the power feed jig) Procedure: 1. Turn on the Power switch on the power feed jig. 2. Press three buttons of G (MD), A (DISC 1), and s (CD) simultaneously. 3. Also, the other functions are enabled by pressing two buttons simultaneously. A combination of respective functions and buttons is as follows. function CD AMS AMS + FR FF MD AMS AMS + FR FF AMS AMS + m M AMS AMS + m M button [COLD RESET] Procedure: 1. Press the ?/1 button to turn the power ON. 2. Press CLEAR (MD) and s (CD) buttons simultaneously.
21
4-1. PRECAUTIONS FOR USE OF TEST MODE
· As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it. Even if the A (MD) button is pressed while the disc is rotating during continuous playback, continuous recording, etc., the disc will not stop rotating. Therefore, it will be ejected while rotating. Be sure to press the A (MD) button after pressing the MENU/NO button and the rotation of disc is stopped. 4-1-1. Recording laser emission mode and operating buttons · · · · · · · · Continuous recording mode (CREC 1MODE) (C35) Laser power check mode (LDPWR CHECK) (C13) Laser power adjustment mode (LDPWR ADJUS) (C04) Iop check (Iop Compare) (C27) Iop value nonvolatile writing (Iop NV Save) (C06) Traverse (MO) check (EF MO CHECK) (C14) Traverse (MO) adjustment (EF MO ADJUS) (C07) When pressing the REC MODE button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure: Pressing the ENTER/YES button and the A (DISC 5) button while pressing the m (MD) button causes the program to enter test mode. When the test mode is set, "[Check]" will be displayed. Rotating the MD JOG knob switches between the following three groups; ··· y Check y Service y Develop y ···. NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
4-3. EXITING THE TEST MODE
Press the REPEAT button. The disc is ejected when loaded, and "Standby" display blinks, and the STANDBY state is set.
4-4. BASIC OPERATIONS OF THE TEST MODE
All operations are performed using the MD JOG knob, ENTER/YES button, and MENU/NO button. The functions of these buttons are as follows.
Function name MENU/NO button ENTER/YES button AMS knob Left or Right Push Function Cancel or move to top hierarchy Set Select Set submenu
22
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by rotating the MD JOG knob. After selecting the group to be used, press the ENTER/YES button. After setting a certain group, rotating the MD JOG knob switches between these modes. Refer to "Group" in the table for details selected. All adjustments and checks during servicing can be performed in the test mode in the Service group. NOTE: Do not use the test mode in the [Develop] group. If used, the unit may not operate normally. If the [Develop] group is set accidentally, press the MENU/NO button immediately to exit the [Develop] group.
Group Display AUTO CHECK Err Display TEMP ADJUS LDPWR ADJUS Iop Write Iop NV Save EF MO ADJUS EF CD ADJUS FBIAS ADJUS AG Set (MO) AG Set (CD) TEMP CHECK LDPWR CHECK EF MO CHECK EF CD CHECK FBIAS CHECK ScurveCHECK VERIFYMODE DETRK CHECK 0920 CHECK Iop Read Iop Compare ADJ CLEAR INFORMATION CPLAY1MODE CREC 1MODE No. C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C25 C26 C27 C28 C31 C34 C35 Automatic self-diagnosis Error history display, clear Temperature compensation offset adjustment Laser power adjustment Iop data writing Writes current Iop value in read nonvolatile memory using microprocessor Traverse (MO) adjustment Traverse (CD) adjustment Focus bias adjustment Focus, tracking gain adjustment (MO) Focus, tracking gain adjustment (CD) Temperature compensation offset check Laser power check Traverse (MO) check Traverse (CD) check Focus bias check S-curve check Nonvolatile memory check Detrack check Most circumference check Iop data display Comparison with initial Iop value written in nonvolatile memory Initialization of nonvolatile memory for adjustment values Display of microprocessor version, etc. Continuous playback mode Continuous recording mode Details Mark Check Service
· For details of each adjustment mode, refer to "5. Electrical Adjustments". For details of "Err Display", refer to "Self-Diagnosis Function" on page 2. · If a different mode has been selected by mistake, press the MENU/NO button to exit that mode. · Modes with (X) in the Mark column are not used for servicing and therefore are not described in detail. If these modes are set accidentally, press the MENU/NO button to exit the mode immediately.
23
4-5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit. (Whichever recordable discs or discs for playback only are available.) 2 Rotate the MD JOG knob and display "CPLAY1MODE" (C34). 3 Press the ENTER/YES button to change the display to "CPLAY1 MID". 4 When access completes, the display changes to "C = AD = ". Note : The numbers " " displayed show you error rates and ADER. 2. Changing the parts to be played back 1 Press the ENTER/YES button during continuous playback to change the display as below. "CPLAY1 MID" t "CPLAY1 OUT" t "CPLAY1 IN" When pressed another time, the parts to be played back can be moved. 2 When access completes, the display changes to "C = AD = ". Note : The numbers " " displayed show you error rates and ADER. 3. Ending the continuous playback mode 1 Press the MENU/NO button. The display will change to "CPLAY1MODE"(C34). 2 Press the A (MD) button to remove the disc. Note : The playback start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster 4-5-2. Operating the Continuous Recording Mode (Use only when performing self-recording/palyback check.) 1. Entering the continuous recording mode 1 Set a recordable disc in the unit. 2 Rotate the MD JOG knob and display "CREC 1MODE" (C35). 3 Press the ENTER/YES button to change the display to "CREC1 MID". 4 When access completes, the display changes to "CREC1 ( )" and REC lights up. Note : The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded 1 When the ENTER/YES button is pressed during continuous recording, the display changes as below. "CREC1 MID" t "CREC1 OUT" t "CREC1 IN" When pressed another time, the parts to be recorded can be changed. REC goes off. )" and REC lights up. 2 When access completes, the display changes to "CREC1 ( Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the MENU/NO button. The display changes to "CREC 1MODE" (C35 ) and REC goes off. 2 Press the A (MD) button to remove the disc. Note 1 : The recording start addresses for IN, MID, and OUT are as follows. IN 40h cluster MID 300h cluster OUT 700h cluster Note 2 : The MENU/NO button can be used to stop recording anytime. Note 3 : Do not perform continuous recording for long periods of time above 5 minutes. Note 4 : During continuous recording, be careful not to apply vibration.
24
4-6. FUNCTIONS OF OTHER BUTTONS
Function ENTER/YES Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. s M (MD JOG) m (MD JOG) REC MODE REC CLEAR A Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed. The sled moves to the inner circumference only when this is pressed. Switches between the pit and groove modes when pressed. Switches the spindle servo mode (CLV S y CLV A). Switches the displayed contents each time the button is pressed. Ejects the disc. Exits the test mode.
4-7. TEST MODE DISPLAYS
Each time the MD DISPLAY button is pressed, the display changes in the following order. When CPLAY and CREC are started, the display will forcibly be switched to the error rate display as the initial mode. 1. Mode display Displays "TEMP ADJUS" (C03), "CPLAY1MODE" (C34), etc. 2. Error rate display Displays the error rate in the following way. C1 = AD = C1 = Indicates the C1 error. AD = Indicates ADER. 3. Address display The address is displayed as follows. (MO:recordable disc, CD:playback only disc) If the CLEAR button is pressed after pressing the PROGRAM button, the display switches from groove to pit or vice versa. h= s= (MO pit and CD) a= (MO groove) h= h = Indicates the header address. s = Indicates the SUBQ address. a = Indicates the ADIP address. Note: "" is displayed when the address cannnot be read.
Mode display Error rate display Address display Auto gain display (Not used in servicing) Detrack check display (Not used in servicing) IVR display (Not used in servicing) C1 error and Jitter display (Not used in servicing) AD error and Jitter display (Not used in servicing)
25
4-8. MEANINGS OF OTHER DISPLAYS
Contents Display G S REC SYNC L.SYNC OVER B/1 A-/REP TRACK/(LP) 4/Calendar frame DISC/LP2 SLEEP/SHUF MONO Servo ON Tracking servo OFF Recording mode ON CLV low speed mode ABCD adjustment completed Tracking offset cancel ON Tracking auto gain OK Focus auto gain OK Pit High reflection CLV S CLV LOCK Groove Low reflection CLV A CLV UNLOCK Tracking offset cancel OFF When Lit Servo OFF Tracking servo ON Recording mode OFF CLV normal mode When Off
4-9. AUTOMATIC SELF-DIAGNOSIS FUNCTION
This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform AUTO CHECK after the laser power check and Iop check. Procedure 1. Press the ENTER/YES button. If "LDPWR" is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW-74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded in step 4, the check will automatically be resumed from "07 CHECK". 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up.
4-10. INFORMATION
Display the software version. Procedure 1. If displayed as "INFORMATION", press the ENTER/YES button. 2. The software version will be displayed. 3. Press the MENU/NO button to end this mode.
4-11. WHEN MEMORY NG IS DISPLAYED
If the nonvolatile memory data is abnormal, "E001"/"MEMORY NG" will be displayed so that the MD deck does not continue operations. In this case, set the test mode promptly and perform the following procedure. Procedure 1. Set the test mode. (Refer to 4-2.) 2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be displayed. "INIT EEP?" 3. Press the s button and A button together. 4. Rotate the MD JOG knob and select MDM-7B. 5. Press the MD JOG knob. If the nonvolatile memory is successfully overwritten, the normal test mode will be set and a message to select the test mode will be displayed.
26
SECTION 5 ELECTRICAL ADJUSTMENTS
CD SECTION
Note: 1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10 M impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. 5. Use the following extension cables and relay connector. · Extension cable (19P) (Part No. J-2501-011-B) Relay connector (Part No. J-2501-167-A) (BD (CD) board CN101 to MAIN board CN111) · Extension cable (17P) (with connector) (Part No. J-2501-167-A) (CONNECTOR board CN701 to MAIN board CN301)
2. RF LEVEL CHECK
oscilloscope BD (CD) board TP (RF) TP (VC) +
1. S-CURVE CHECK
oscilloscope BD (CD) board TP (FEO) TP (VC)
+
Procedure: 1. Connect oscilloscope to TP (RF). As TP (RF) and TP (VC) are located at the edge of board, clip them together with the board using alligator clips. 2. Turn the power ON. 3. Load a disc (YEDS-18) and playback. 4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
Note: Clear RF signal waveform means that the shape " " can be clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV: 200 mV TIME/DIV: 500 ns
Procedure: 1. Connect oscilloscope to TP (FEO). 2. Connect between TP (FEO) and TP (VC) by lead wire. 3. Connect between TP (AGCCON) and TP (GND) by lead wire. 4. Turn the power ON. 5. Load a disc (YEDS-18) and turn the power ON again and actuate the focus search. (Actuate the focus search when disc tray is moving in and out) 6. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 2.4±0.7 Vp-p.
S-curve waveform
symmetry
level: 1.2 ± 0.2 Vp-p
Connecting points : [ BD (CD) BOARD ] -- SIDE B --
A within 2.4 ± 0.7 Vp-p B
TP (RF) TP (VC)
7. After check, remove the lead wire connected in step 2.
Note: · Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. · Take sweep time as long as possible and light up the brightness to obtain best waveform.
IC102 TP TP (AGCCON) (FEO)
TP (GND)
TP (TEO)
27
MD SECTION 5-1. PARTS REPLACEMENT AND ADJUSTMENT
If malfunctions caused by the optical pick-up such as sound skipping are suspected, follow the following check.
Check before replacement
Start
5-6-2. Laser Power Check (See page 31) OK
NG
5-6-3. Iop Compare (See page 31) OK
NG
5-6-4. Auto Check (See page 32) OK
NG
Replace the optical pick-up or MDM-7B
Other faults are suspected. Check the threading mechanism, etc.
28
Adjustment flow
Start
· Abbreviation OP: Optical pick-up
Replace IC195 NO
YES
After turning off and then on the power, initialize the EEPROM For details, refer to 4-11. WHEN MEMORY NG IS DISPLAYED (See page 26)
Replace OP or IC195 NO
YES
5-7. INITIAL SETTING OF ADJUSTMENT VALUE (See page 34)
Replace IC101, IC195, or D101 NO
YES
5-9. TEMPERATURE COMPENSATION OFFSET ADJUSTMENT (See page 34)
Replace OP, IC190, or IC195 NO
YES
5-10. LASER POWER ADJUSTMENT (See page 34)
Replace OP, IC102, IC190, or IC195 NO
YES
5-11. Iop NV SAVE (See page 35)
Replace OP, IC101, IC151, or IC195 NO
YES
5-12. TRAVERSE ADJUSTMENT (See page 35) 5-13. FOCUS BIAS ADJUSTMENT (See page 36) 5-16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT (See page 37)
Replace OP NO
YES
OP change in Err Display mode Iop write
Replace the spindle motor NO 5-6-4. Auto Check (See page 32)
YES
Spdl change in Err Display mode
End adjustments
29
5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION
To check the emission of the laser diode during adjustments, never view directly from the top as this may lose your eye-sight.
5-3. PRECAUTIONS FOR USE OF OPTICAL PICKUP (KMS-260B)
As the laser diode in the optical pick-up is easily damaged by static electricity, solder the laser tap of the flexible board when using it. Before disconnecting the connector, desolder first. Before connecting the connector, be careful not to remove the solder. Also take adequate measures to prevent damage by static electricity. Handle the flexible board with care as it breaks easily.
pick-up flexible board
laser tap
Optical pick-up flexible board
5-4. PRECAUTIONS FOR ADJUSTMENTS
1) When replacing the following parts, perform the adjustments and checks with in the order shown in the following table. 2) Set the test mode when performing adjustments. After completing the adjustments, exit the test mode. Perform the adjustments and checks in "group S" of the test mode. 3) Perform the adjustments to be needed in the order shown. 4) Use the following tools and measuring devices. · Check Disc (MD) TDYS-1 (Parts No. 4-963-646-01) · Test Disk (MDW-74/GA-1) (Parts No. 4-229-747-01) · Laser power meter LPM-8001 (Parts No. J-2501-046-A) or MD Laser power meter 8010S (Parts No. J-2501-145-A) · Oscilloscope (Measure after performing CAL of prove.) · Digital voltmeter · Thermometer · Jig for checking BD board waveform (Parts No. : J-2501-196-A) 5) When observing several signals on the oscilloscope, etc., make sure that VC and ground do not connect inside the oscilloscope. (VC and ground will become short-circuited.) 6) Using the above jig enables the waveform to be checked without the need to solder. (Refer to Servicing Note on page 7.) 7) As the disc used will affect the adjustment results, make sure that no dusts nor fingerprints are attached to it.
Parts to be replaced Adjustment 5-7. Initial setting of adjustment values 5-8. Recording of Iop information 5-9. TEMP ADJUST 5-10. Laser power adjustment 5-11. Iop NV Save 5-12. Traverse adjustment 5-13. Focus bias adjustment 5-16. Auto gain adjustment 5-6-4. AUTO CHECK Optical Pick-up IC101 IC102 IC151 IC190 IC195 D101
30
5-5. USING THE CONTINUOUSLY RECORDED DISC
* This disc is used in focus bias adjustment and error rate check. The following describes how to create a continuous recording disc. 1. Insert a disc (blank disc) commercially available. 2. Rotate the MD JOG knob and display "CREC 1MODE" (C35). 3. Press the ENTER/YES button again to display "CREC1 MID". Display "CREC (0300)" and start to recording. 4. Complete recording within 5 minutes. 5. Press the MENU/NO button and stop recording . 6. Press the AEJECT button and remove the disc. The above has been how to create a continuous recorded data for the focus bias adjustment and error rate check. Note : · Be careful not to apply vibration during continuous recording.
Checking Procedure: 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m button or M button to move the optical pick-up.) Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP). 2. Then, rotate the MD JOG knob and display "LDPWR CHECK" (C13). 3. Press the ENTER/YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.84 to 0.92 mW. 4. Press the ENTER/YES button once more and display " LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Specified Value : Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
5-6. CHECKS PRIOR TO REPAIRS
These checks are performed before replacing parts according to "approximate specifications" to determine the faulty locations. For details, refer to "Checks Prior to Parts Replacement and Adjustments" (See page 9). 5-6-1. Temperature Compensation Offset Check When performing adjustments, set the internal temperature and room temperature to 22 to 28ºC. Checks cannot be performed properly if performed after some time from power ON due to the rise in the temperature of the IC and diode, etc. So, perform the checks again after waiting some time. Checking Procedure: 1. Rotate the MD JOG knob to display "TEMP CHECK" (C12). 2. Press the ENTER/YES button. 3. "T=@@(##) [OK]" should be displayed. If "T=@@ (##) [NG]" is displayed, it means that the results are bad. (@@ indicates the current value set, and ## indicates the value written in the non-volatile memory.) 5-6-2. Laser Power Check Before checking, check the Iop value of the optical pick-up. (Refer to 5-8. Recording and Displaying the Iop Information.) Connection :
Laser power meter
260B 20101 H0576 R
(For details of the method for checking this value, refer to "5-8. Recording and Displaying the Iop Information".)
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
5. Press the MENU/NO button and display "LDPWR CHECK" (C13) and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) Note 1: After step 4, each time the ENTER/YES button is pressed, the display will be switched between "LD 0.7 mW $ ", "LD 6.2 mW $ ", and "LD Wp $ ". Nothing needs to be performed here. 5-6-3. Iop Compare The current Iop value at laser power 7 mw output and reference Iop value (set at shipment) written in the nonvolatile memory are compared, and the rate of increase/decrease will be displayed in percentage. Note: Perform this function with the optical pick-up set at room temperature. Procedure 1. Rotate the MD JOG knob to display "Iop Compare" (C27). 2. Press the ENTER/YES button and start measurements. 3. When measurements complete, the display changes to "±xx%yy". xx is the percentage of increase/decrease, and OK or NG is displayed at yy to indicate whether the percentage of increase/ decrease is within the allowable range. 4. Press the MENU/NO button to end.
Optical pick-up objective lens
Digital volt meter
BD (MD) board CN105 pin 1 (I+3V) CN105 pin 2 (IOP)
31
5-6-4. Auto Check This test mode performs CREC and CPLAY automatically for mainly checking the characteristics of the optical pick-up. To perform this test mode, the laser power must first be checked. Perform Auto Check after the laser power check and Iop compare. Procedure 1. Press the ENTER/YES button. If "LDPWR minicheck" is displayed, it means that the laser power check has not been performed. In this case, perform the laser power check and Iop compare, and then repeat from step 1. 2. If a disc is in the mechanical deck, it will be ejected forcibly. "DISC IN" will be displayed in this case. Load a test disc (MDW74/GA-1) which can be recorded. 3. If a disk is loaded at step 2, the check will start automatically. 4. When "XX CHECK" is displayed, the item corresponding to XX will be performed. When "06 CHECK" completes, the disc loaded at step 2 will be ejected. "DISC IN" will be displayed. Load the check disc (MD) TDYS-1. 5. When the disc is loaded, the check will automatically be resumed from "07 CHECK". 6. After completing to test item 12, check OK or NG will be displayed. If all items are OK, "CHECK ALL OK" will be displayed. If any item is NG, it will be displayed as "NG:xxxx". When "CHECK ALL OK" is displayed, it means that the optical pick-up is normal. Check the operations of the other spindle motor, thread motor, etc. When displayed as "NG:xxxx", it means that the optical pick-up is faulty. In this case, replace the optical pick-up. 5-6-5. Other Checks All the following checks are performed by the Auto Check mode. They therefore need not be performed in normal operation. 5-6-6. Traverse Check 5-6-7. Focus Bias Check 5-6-8. C PLAY Check 5-6-9. Self-Recording/Playback Check 5-6-6. Traverse Check Connection :
Oscilloscope
6. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the MD JOG knob. (Read power traverse checking) (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
7. Press the ENTER/YES button and display "EFB = MO-W". 8. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the MD JOG knob. (Write power traverse checking) (Traverse Waveform)
A VC B
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
9. Press the ENTER/YES button display "EFB = MO-P". Then, the optical pick-up moves to the pit area automatically and servo is imposed. 10. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the MD JOG knob. (Traverse Waveform)
A VC
BD (MD) board CN105 pin 4 (TE) CN105 pin 6 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
B
Checking Procedure: 1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) of the BD (MD) board. 2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.) 3. Press the M button and move the optical pick-up outside the pit. 4. Rotate the MD JOG knob and display "EF MO CHECK" (C14). 5. Press the ENTER/YES button and display "EFB = MO-R". (Laser power READ power/Focus servo ON/tracking servo OFF/ spindle (S) servo ON)
11. Press the ENTER/YES button display "EF MO CHECK" (C14) The disc stops rotating automatically. 12. Press the A button and remove the disc. 13. Load the check disc (MD) TDYS-1. 14. Roteto the MD JOG knob and display "EF CD CHECK" (C15). 15. Press the ENTER/YES button and display "EFB = CD". Servo is imposed automatically.
32
16. Observe the waveform of the oscilloscope, and check that the specified value is satisfied. Do not rotate the MD JOG knob. (Traverse Waveform)
A VC B
5-6-8. C PLAY Check MO Error Rate Check Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to "5-5. Using the Continuously Recorded Disc".) 2. Rotate the MD JOG knob and display "CPLAY1MODE" (C34). 3. Press the ENTER/YES button and display "CPLAY1 MID". 4. The display changes to "C1 = AD = ". 5. If the C1 error rate is below 20, check that ADER is 00. 6. Press the MENU/NO button, stop playback, press the A button, and test disc. CD Error Rate Check Checking Procedure : 1. Load a check disc (MD) TDYS-1. 2. Rotate the MD JOG knob and display "CPLAY1MODE" (C34). 3. Press the ENTER/YES button twice and display "CPLAY1 MID". 4. The display changes to "C1 = AD = ". 5. Check that the C1 error rate is below 20. 6. Press the MENU/NO button, stop playback, press the A button, and the test disc. 5-6-9. Self-Recording/playback Check Prepare a continuous recording disc using the unit to be repaired and check the error rate. Checking Procedure : 1. Insert a recordable test disc (MDW-74/GA-1) into the unit. 2. Rotate the MD JOG knob to display "CREC 1MODE" (C35). 3. Press the ENTER/YES button to display the "CREC1 MID". 4. When recording starts, " REC " is displayed, this becomes "CREC (@@@@)" (@@@@ is the address), and recording starts. 5. About 1 minute later, press the MENU/NO button to stop continuous recording. 6. Rotate the MD JOG knob to display "CPLAY1MODE" (C34). 7. Press the ENTER/YES button to display "C PLAY1 MID". AD = " will be displayed. 8. "C1 = 9. Check that the C1 error becomes below 20 and the AD error below 2. 10. Press the MENU/NO button to stop playback, and press the A button and remove the disc.
Specified value : Below 10% offset value Offset value (%) = IA BI X 100 2 (A + B)
17. Press the ENTER/YES button and display "EF CD CHECK" (C15). 18. Press the A button and remove the check disc (MD) TDYS-1. Note 1 : MO reading data will be erased during if a recorded disc is used in this adjustment. Note 2 : If the traverse waveform is not clear, connect the oscilloscope as shown in the following figure so that it can be seen more clearly.
Oscilloscope
BD (MD) board CN105 pin 4 (TE) CN105 pin 6 (VC)
330 k 10pF
5-6-7. Focus Bias Check Change the focus bias and check the focus tolerance amount. Checking Procedure : 1. Load a continuously recorded test disc (MDW-74/GA-1). (Refer to "5-5. Using the Continuously Recorded Disc".) 2. Rotate the MD JOG knob and display "CPLAY 1MODE" (C34). 3. Press the ENTER/YES button and display "CPLAY1 MID". AD = " is 4. Press the MENU/NO button when "C = displayed. 5. Rotate the MD JOG knob and display "FBIAS CHECK" (C16). 6. Press the ENTER/YES button and display " / c = ". The first four digits indicate the C1 error rate, the two digits after [/] indicate ADER, and the 2 digits after [c =] indicate the focus bias value. Check that the C1 error is below 20 and ADER is below 2. 7. Press the ENTER/YES button and display " / b = ". Check that the C1 error is below 100 and ADER is below 2. 8. Press the ENTER/YES button and display " / a = ". Check that the C1 error is below 100 and ADER is below 2. 9. Press the MENU/NO button, next press the A button, and remove the test disc.
33
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note: Mode which sets the adjustment results recorded in the non-volatile memory to the initial setting value. However the results of the temperature compensation offset adjustment will not change to the initial setting value. If initial setting is performed, perform all adjustments again excluding the temperature compensation offset adjustment. For details of the initial setting, refer to "5-4. Precautions for Adjustments" and execute the initial setting before the adjustment as required. Setting Procedure : 1. Rotate the MD JOG knob to display "ADJ CLEAR" (C28). 2. Press the ENTER/YES button. "Complete!" will be displayed momentarily and initial setting will be executed, after which "ADJ CLEAR" (C28) will be displayed.
5-8. RECORDING AND DISPLAYING THE Iop INFORMATION
The IOP data can be recorded in the non-volatile memory. The Iop value on the label of the optical pick-up and the Iop value after the adjustment will be recorded. Recording these data eliminates the need to read the label on the optical pick-up. Recording Procedure : 1. While pressing the MD JOG knob and s button, connect the power plug to the outlet, and release the MD JOG knob and s button. 2. Rotate the MD JOG knob to display "[Service]", and press the ENTER/YES button. 3. Rotate the MD JOG knob to display "Iop Write" (C05), and press the ENTER/YES button. 4. The display becomes Ref=@@@.@ (@ is an arbitrary number) and the numbers which can be changed will blink. 5. Input the Iop value written on the optical pick-up. To select the number : Rotate the MD JOG knob. To select the digit : Press the MD JOG knob 6. When the ENTER/YES button is pressed, the display becomes "Measu=@@@.@" (@ is an arbitrary number). 7. As the adjustment results are recorded for the 6 value. Leave it as it is and press the ENTER/YES button. 8. "Complete!" will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become "Iop Write" (C05). Display Procedure : 1. Rotate the MD JOG knob to display "Iop Read" (C26). 2. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ indicates the Iop value labeled on the optical pick-up. ##.# indicates the Iop value after adjustment 3. To end, press the MD JOG button or MENU/NO button to display "Iop Read" (C26).
Note : 1. Usually, do not perform this adjustment. 2. Perform this adjustment in an ambient temperature of 22 °C to 28 °C. Perform it immediately after the power is turned on when the internal temperature of the unit is the same as the ambient temperature of 22 °C to 28 °C. 3. When D101 has been replaced, perform this adjustment after the temperature of this part has become the ambient temperature. Adjusting Procedure : 1. Rotate the MD JOG knob and display "TEMP ADJUS" (C03). 2. Press the ENTER/YES button and select the "TEMP ADJUS" (C03) mode. [OK]" and the current temperature data will be 3. "TEMP = displayed. 4. To save the data, press the ENTER/YES button. When not saving the data, press the MENU/NO button. 5. When the ENTER/YES button is pressed, "TEMP = SAVE" will be displayed and turned back to "TEMP ADJUS" (C03) display then. When the MENU/NO button is pressed, "TEMP ADJUS" (C03) will be displayed immediatelly. Specified Value : The "TEMP = " should be within "E0 - EF", "F0 - FF", "00 0F", "10 - 1F" and "20 - 2F".
5-10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments. (Refer to 5-8. Recording and Displaying the Iop Information.) Connection :
Laser power meter
Optical pick-up objective lens Digital volt meter
BD (MD) board CN105 pin 1 (I+3V) CN105 pin 2 (IOP)
5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT
Save the temperature data at that time in the non-volatile memory as 25 °C reference data.
Adjusting Procedure : 1. Set the laser power meter on the objective lens of the optical pick-up. (When it cannot be set properly, press the m button or M button to move the optical pick-up.) Connect the digital volt meter to CN105 pin 1 (I+3V) and CN105 pin 2 (IOP). 2. Rotate the MD JOG knob and display "LDPWR ADJUS" (C04). (Laser power : For adjustment) 3. Press the ENTER/YES button once and display "LD 0.9 mW $ ". 4. Rotate the MD JOG knob so that the reading of the laser power meter becomes 0.85 to 0.91 mW. Press the ENTER/YES button after setting the range knob of the laser power meter, and save the adjustment results. ("LD SAVE $ " will be displayed for a moment.) 5. Then "LD 7.0 mW $ " will be displayed. 6. Rotate the MD JOG knob so that the reading of the laser power meter becomes 6.9 to 7.1 mW, press the ENTER/YES button and save it. Note : Do not perform the emission with 7.0 mW more than 15 seconds continuously.
34
7. Then, rotate the MD JOG knob and display "LDPWR CHECK" (C13). 8. Press the ENTER/YES button once and display "LD 0.9 mW $ ". Check that the reading of the laser power meter become 0.85 to 0.91 mW. 9. Press the ENTER/YES button once more and display "LD 7.0 mW $ ". Check that the reading the laser power meter and digital volt meter satisfy the specified value. Note down the digital voltmeter reading value. Specified Value : Laser power meter reading : 7.0 ± 0.2 mW Digital voltmeter reading : optical pick-up displayed value ± 10% (Optical pick-up label)
KMS
5-12. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
BD (MD) board CN105 pin 4 (TE) CN105 pin 6 (VC) V : 0.5 V/div H : 10 ms/div Input : DC mode
260B 20101 H0576 R
(For details of the method for checking this value, refer to "5-8. Recording and Displaying the IOP Information".)
Iop = 57.6 mA in this case Iop (mA) = Digital voltmeter reading (mV)/1 ()
10. Press the MENU/NO button and display "LDPWR CHECK" (C13) and stop the laser emission. (The MENU/NO button is effective at all times to stop the laser emission.) 11. Rotate the MD JOG knob to display "Iop Write" (C05). 12. Press the ENTER/YES button. When the display becomes Ref=@@@.@ (@ is an arbitrary number), press the ENTER/ YES button to display "Measu=@@@.@" (@ is an arbitrary number). 13. The numbers which can be changed will blink. Input the Iop value noted down at step 9. To select the number : Rotate the MD JOG knob. To select the digit : Press the MD JOG knob 14. When the ENTER/YES button is pressed, "Complete!" will be displa