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MINI Hi-Fi COMPONENT SYSTEM
Service Manual
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HCD-VZ50MD
SERVICE MANUAL
E Model Tourist Model
HCD-VZ50MD is the tuner, deck, CD, MD and amplifier section in DHC-VZ50MD.
This stereo system is equipped with the Dolby B-type noise reduction system*. * Manufactured under license from Dolby Laboratories Licensing Corporation. DOLBY and the double-D symbol ; are trademarks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism CD SECTION CD Mechanism Type Base Unit Type Optical Pick-up Type Model Name Using Similar Mechanism MD SECTION TAPE DECK SECTION MD Mechanism Type Optical Pick-up Type Model Name Using Similar Mechanism Tape Transport Mechanism Type
NEW CDM53F-K4BD37 BU-K4BD37 KSM-213DHAP/Z-NP HCD-ZX50MD MDM-7B KMS-260B/J1N HCD-ZX50MD TCM-230AWR12
SPECIFICATIONS
Amplifier section
The following measured at 120/220/240 V AC, 50/60 Hz DIN power output (rated) 115 + 115 watts (6 ohms at 1 kHz, DIN) Continuous RMS power output (reference) 150 + 150 watts (6 ohms at 1 kHz, 10 % THD) Inputs VIDEO (AUDIO) IN: (phono jacks) MIC 1/2: (mini jack) Outputs VIDEO OUT: (phono jack)
VIDEO CD/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 2 Hz 20 kHz (±0.5 dB) More than 90 dB More than 90 dB NTSC, PAL
MD deck section
System Laser Laser output 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 a 7 mm aperture. 44.1 kHz 20 20,000 Hz
Laser output
voltage 250 mV, impedance 47 kilohms sensitivity 1 mV, impedance 10 kilohms
Sampling frequency Frequency response
Wavelength Frequency response Signal-to-noise ratio Dynamic range Video color system format
Tape player section
Recording system Frequency response (DOLBY NR OFF) 4-track 2-channel stereo 40 13,000 Hz (±3 dB), using Sony TYPE I cassette 40 14,000 Hz (±3 dB), using Sony TYPE II cassette
S-VIDEO OUT: (4-pin/mini-DIN jack)
PHONES: (stereo mini jack) FRONT SPEAKER: SUPER WOOFER:
max. output level 1 Vp-p, unbalanced, Sync negative, load impedance 75 ohms Y: 1 Vp-p, unbalanced, Sync negative, C: 0.286 Vp-p, load impedance 75 ohms accepts headphones of 8 ohms or more accepts impedance of 6 to 16 ohms Voltage 1 V, impedance 1 kilohms
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MINI Hi-Fi COMPONENT SYSTEM
Tuner section
FM stereo, FM/AM superheterodyne tuner
General
Power requirements 120 V, 220 V, 230 240 V AC, 50/60 Hz Adjustable with voltage selector 180 watts Approx. 250 x 375 x 395 mm Approx. 12.0 kg AM loop antenna (1) FM lead antenna (1) Remote Commander (1) Batteries (2) Video cable (1) Speaker cords (2) Front speaker pads (8)
FM tuner section
Tuning range Tourist model: Other models: Antenna Antenna terminals Intermediate frequency 76.0 108.0 MHz 87.5 108.0 MHz FM lead antenna 75 ohm unbalanced 10.7 MHz Power consumption Dimensions (w/h/d) Mass Supplied accessories: 531 1,602 kHz (with the interval set at 9 kHz) 530 1,710 kHz (with the interval set at 10 kHz) AM loop antenna External antenna terminal 450 kHz
AM tuner section
Tuning range
Antenna Antenna terminals Intermediate frequency
Design and specifications are subject to change without notice.
Self-diagnosis Display
This system has the 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.
C11 / Protected The MD is protected against erasure. p Remove the MD and slide the tab to close the slot (page 49). C12 / Cannot Copy You are attempting to record a CD with a format that the system does not support, such as CD-ROM. p C13 / REC Error Recording is not possible. p Move the system to a stable place and start recording over from the beginning. The MD is dirty or is scratched or the MD does not meet the standards. p Change the MD with another one and start recording over from the beginning. C13 / Read Error The MD cannot read the disc information correctly. p Eject the MD once, then insert it again. C14 / Toc Error The MD cannot read the disc information correctly. p Change the MD with another one. p Erase all the recorded contents of the MD using the Erase function.
C41 / Cannot Copy This unit complies with the Serial Copy Management System (SCMS) which limits the number of digital copies that can be made of any given digital audio source. E0001 / MEMORY NG The component has internal problems. p Consult your nearest Sony dealer. E0101 / LASER NG There is a problem with the laser pickup. p The laser pickup may be damaged. Consult 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 other modes are entered accidentally, press the NAME EDIT/ CHARACTER button while REC IT is lit, and when REC IT goes off, press the MD Z button to exit the mode. In the power ON state, set the function to MD, and while pressing the DISPLAY and x buttons together, press V-GROOVE . While the test mode is set. "[Check]" will be displayed. 2. Move the multi-stick left and right to display "[Service]" and press the PUSH ENTER button. 3. Move the multi-stick left and right to display "Err Display". 4. Press the PUSH ENTER button to enter the error history mode. "op rec tm" will be displayed. 5. Select the item to be displayed or executed using the multi-stick. 6. Press the NAME EDIT/CHARACTER button so that REC IT lights up. 7. Press the MD REC MODE button to display the selected item. 8. Press the REC MODE button another time to return to step 4. 9. Pressing the CLEAR button when REC IT is lit displays "Err Display" and exits the error history display mode. 10. To exit the test mode, press the MD Z button while REC IT is off. This sets the standby state and ends the test mode. 1.
2
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 Multi stick. 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 Multi stick. Mode for erasing the error and retry address histories Procedure 1. Press the MD REC MODE button while "REC IT" is lit when displayed as "er refresh". 2. Press the PUSH ENTER 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 MD REC MODE button while "REC IT" is lit when displayed as "op change". 2. Press the PUSH ENTER 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 MD REC MODE button while "REC IT" is lit when displayed as "spdl change" 2. Press the PUSH ENTER 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
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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
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TABLE OF CONTENTS 1. SERVICING NOTES ··················································· 6 2. GENERAL ........................................................................ 14 3. DISASSEMBLY ································································ 17 4. TEST MODE ...................................................................... 25 5. MECHANICAL ADJUSTMENTS ............................... 33 6. ELECTRICAL ADJUSTMENTS ................................. 33 7. DIAGRAMS ······································································· 48
7-1. Circuit Boards Location ·············································· 48 7-2. Block Diagrams ··························································· 51 7-3. Printed Wiring Board Deck Section ······················ 56 7-4. Schematic Diagram Deck Section ························· 57 7-5. Printed Wiring Board CD Section ························· 58 7-6. Schematic Diagram CD Section ···························· 59 7-7. Printed Wiring Board MD Section ························ 60 7-8. Schematic Diagram MD (1/2) Section ·················· 61 7-9. Schematic Diagram MD (2/2) Section ·················· 62 7-10. Printed Wiring Board Main Section ······················ 63 7-11. Schematic Diagram Main (1/4) Section ················ 64 7-12. Schematic Diagram Main (2/4) Section ················ 65 7-13. Schematic Diagram Main (3/4) Section ··············· 66 7-14. Schematic Diagram Main (4/4) Section ················ 67 7-15. Printed Wiring Board Digital (Side A) Section ····· 68 7-16. Printed Wiring Board Digital (Side B) Section ····· 69 7-17. Schematic Diagram Digital (1/2) Section ············· 70 7-18. Schematic Diagram-Digital (2/2) Section ··················· 71 7-19. Printed Wiring Board Amp Section ······················· 72 7-20. Schematic Diagram Amp Section ·························· 73 7-21. Printed Wiring Board Panel Section ······················ 74 7-22. Schematic Diagram Panel Section ························ 75 7-23. Printed Wiring Board Switch Section ··················· 76 7-24. Schematic Diagram Switch Section ······················ 77 7-25. Printed Wiring Board CD Mechanism Section ····· 78 7-26. Schematic Diagram CD Mechanism Section ········ 79 7-27. Printed Wiring Board Leaf Sw Section ················· 80 7-28. Schematic Diagram Leaf Sw Section ···················· 80 7-29. Printed Wiring Board Mic Section ························ 81 7-30. Schematic Diagram Mic Section ··························· 81 7-31. Printed Wiring Board Power Supply Section ········ 82 7-32. Schematic Diagram Power Supply Section ··········· 83 7-33. Schematic Diagram Video CD Section (1/2) ········ 84 7-34. Schematic Diagram Video CD Section (2/2) ········ 85 7-35. Printed Wiring Boards Video CD Section ············ 86 7-36. IC Block Diagrams ······················································ 87 7-37. IC Pin Functions ·························································· 94
8. EXPLPDED VIEWS ······················································ 105
8-1. 8-2. 8-3. 8-4. 8-5. 8-6. 8-7. 8-8. Back Panel Section ···················································· 105 Front Panel Section ··················································· 106 Chassis Section ·························································· 107 CD Mechanism Deck Section-1 ································ 108 CD Mechanism Deck Section-2 ································ 109 Tape Mechanism Deck Section ································· 110 MD Mechanism Section-1 ········································· 111 MD Mechanism Section-2 ········································· 112
9. ELECTRICAL PARTS LIST ······································· 113
MODEL IDENTIFICATION
-- BACK PANEL --
Parts No.
MODEL
SP, MY model HK model JE model · Abbreviation HK : Hong Kong model MY : Malaysia model SP : Singapore model JE : Tourist model
PARTS No.
4-227-557-0s 4-227-557-1s 4-227-557-2s
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SECTION 1 SERVICE 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
SAFETY-RELATED COMPONENT WARNING!!
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.
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.
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.
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.
CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.
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SERVICE POSITION
Jig (A-2501-076-A)
CN701
CN503
· CD MECHANISM BLOCK
Jig (A-2501-165-A)
Jig (A-2501-167-A)
Jig (A-2501-016-A)
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· BD (CD) BOARD To repair the BD (CD) board,remove the bottom plate.
BD (CD) board
Bottom view
8
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
9
Iop DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMORY (IC195 OF BD (MD) 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 (MD) board), record the Iop value on the optical pick-up according to the following procedure. Record Precedure: 1. In the power ON state, set the function to MD, and while pressing the DISPLAY and x buttons together, press V-GROOVE . 2. Move the Multi stick to display "[Service]", and press the PUSH ENTER button. 3. Move the Multi stick to display "Iop Write" (C05), and press the PUSH ENTER 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 : Move the Multi stick. To select the digit : Press the MD REC MODE button while REC IT is lit. 6. When the PUSH ENTER 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 PUSH ENTER 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 Precedure: 1. In the power ON state, set the function to MD, and while pressing the DISPLAY and x buttons together, press V-GROOVE . 2. Move the Multi stick to display "[Service]", and press the PUSH ENTER button. 3. Move the Multi stick to display "Iop Read" (C26). 4. "@@.@/##.#" is displayed and the recorded contents are displayed. @@.@ : indicates the Iop value labeled on the optical pick-up. ##.# : indicates the Iop value after adjustment 5. To end, press the NAME EDIT/CHARACTER button while REC IT is lit, or press the MD REC MODE button to display "Iop Read" (C26).
10
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 "6 Electrical Adjustments". · 6-6-2. Laser power check (see page 41) · 6-6-3. Iop Compare (see page 41) · 6-6-4. Auto Check (see page 42) 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.
FORCED RESET
The system microprocessor can be reset in the following procedure. Use these procedure when the unit cannot be operated normally due to the overrunning of the microprocessor, etc. Procedure : 1. Disconnect the AC outlet. 2. Momentary short between BT900 pin 3 and BT900 pin # by lead wire. 3. Momentary short between C416 pin 3 and C416 pin # by lead wire.
[MAIN BOARD]
BT900
IC401
+
+
C416
11
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 x button and DISPLAY button, CINEMA SPACE button. 2. When the mode is set, "RTs 00c 00e 000" is displayed. 3. Press the MD REC button to start recording. Then press the MD u button and start recording. 4. To check the "track mode", press the MD u button to start play. 5. To exit the test mode, press the @/1 button, and turn OFF the power. When "TOC" disappears, disconnect the power plug from the outlet. If the test mode cannot be exited, refer to "Forced Reset" on page 12 .
Fig. 1 Reading the Test Mode Display (During recording and stop)
RTs@@c##c*** Fluorescent indicator tube @@ : Cause of retry ## : Number of retries *** : Number of retry errors
(During playback)
@@####**$$ Fluorescent indicator tube @@ ## ** $$ : : : : 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)
}
Fig. 2 Reading the Test Mode Display
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".
12
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", and "Write allowed". Example When 07 is displayed: Higher bit : 0 = 0000 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", 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
13
SECTION 2 GENERAL
1 2 3 45 6 7890 qa qs qd qf ea rk rj wf rl rh wd qg qh qj qk ql w; rd rs ra r; el ek es wj wk wl e;
wh wg
ed ef
rg ej rf eh
eg
ws
wa
1 2 3 4 5 6 7 8 9 0 qa qs qd qf qg qh qj qk ql w; wa ws wd wf wg
?/1 button and indicator TAPE A h button and indicator TAPE A H button and indicator TAPE B h button and indicator TAPE B H button and indicator x button CD indicator MD indicator SET UP MODE indicator SOUND MODE indicator CINEMA SPACE button and indicator V-GROOVE button and indicator MODE SELECT button PUSH ENTER button/Multi stick MD u button CD u button MD Z button VOLUME knob GROOVE button and indicator GROOVE EX button and indicator Z 1 to Z 5 buttons DISC 1 to DISC 5 buttons PHONES jack FUNCTION button DISPLAY button
wh wj wk wl e; ea es ed ef eg eh ej ek el r; ra rs rd rf rg rh rj rk rl
TIMER SELECT indicator . button > button m button M button NAME EDIT/CHARACTER button CLEAR button HIGH SPEED CD-MD SYNC button TAPE B Z button DISC 1 to DISC 5 indicator MIC 2 jack MIC VOL knob TAPE A Z button TAPE REC PAUSE/START button and indicator MD REC / REC IT button and indicator MD REC MODE button SYNC REC button TUNER/BAND button MIC 1 jack ECHO VOL knob PREVIOUS button NEXT button RETURN button SELECT button
14
Step 1: Hooking up the system (continued)
Using the remote
You can use the shaded buttons shown below to operate a Sony TV.
TV ?/1 TV/VIDEO TV VOL +/ TV CH +/
Step 2: Setting the time
You must set the time before using the timer functions. The clock is on a 12-hour system.
?/1 (Power)
3 4
Getting Started
Move the multi stick toward v or V repeatedly to set the hour. Move the multi stick toward B.
The minute indication flashes.
To change the time
The previous explanation shows you how to set the time while the power is off. To change the time while the power is on, do the following: 1 Press MODE SELECT repeatedly to select "Set Up Mode", then press PUSH ENTER. 2 Move the multi stick toward b or B repeatedly to select "Timer Set Up ?", then press PUSH ENTER. 3 Move the multi stick toward b or B repeatedly to select "Clock Set ?", then press PUSH ENTER. 4 Perform steps 3 through 6 on the left. Note
The clock settings are canceled when you disconnect the power cord or if a power failure occurs.
2,3,4,5,6 1
5 6
Move the multi stick toward v or V repeatedly to set the minute. Press PUSH ENTER.
To Switch the TV's video input Change the TV channels Adjusts the volume of the TV speaker(s)
Press TV/VIDEO. TV CH +/. TV VOL +/.
Turn the TV on or off TV ?/1.
To cancel the menu operation
Press MODE SELECT. Tips
· Refer to the illustration to use the multi stick. Place your finger on the center of the multi stick and move in the direction you want (up/down or left/ right shown v/V or b/B in this manual). Up (v)
Tip
With normal use, the batteries should last for about six months. When the remote no longer operates the system, replace both batteries with new ones.
1 2
Press MODE SELECT when the system is turned off.
"Clock Set ?" appears.
Left (b)
PUSH ENTER
Right (B)
Note
If you do not use the remote for a long period of time, remove the batteries to avoid possible damage from battery leakage.
Down (V) · If you've made a mistake, start over from step 1.
Press PUSH ENTER.
The hour indication flashes.
When carrying this system
Do the following to protect the CD mechanism. Make sure that all discs are removed from the unit. 1 Press FUNCTION repeatedly until "CD" appears in the display. 2 Hold down V-GROOVE and press ?/1 so that "LOCK" appears in the display.
This section is extracted from instruction manual.
continued
15
7
8
16
Items in "Sound Mode" and "Set Up Mode"
The numbers in parenthesis denotes the page number for the item.
Set Up Mode CD Set Up ? * Set Up Mode TAPE Set Up ? Direction Set Up ? (76) DOLBY NR Set Up ? (77) Mode End Timer Set Up ? Clock Set ? (08) * Timer Set ? (91) * Timer Select ? (91) Mode End Display Set Up ? Spectrum Set Up ? (83) Dimmer Set Up ? (83) Mode End Mode End
Repeat Set Up ? (39)
Sound Mode
Play Mode Set Up ? (40)
Effect OnpOff/OffpOn (82) File Select (82) P File Memory (86) Equalizer Control (85) * Cinema Space (84) Mode End
1)
CD Edit Start ? (80)
2)
Program Set ? (41) * PGM Check Clear (41) * Picture Effect (38) Mode End MD Set Up ? *
Repeat Set Up ? (45)
· To cancel the menu operation, press MODE SELECT. · The items with asterisk (*) cannot be selected depending on the situation. · Select "Mode End" to finish the menu operation.
Play Mode Set Up ? (46)
3)
Program Set ? (46) * PGM Check Clear (47) MD Edit ? (54) Mode End TUNER Set Up ? *
Additional Information
* Stereo Mono ? (23) TUNER Memory ? (10) * TUNER Erase ? (11) * TUNER Name? (89) Mode End Cannot be selected during CD playback. Cannot be selected during CD program playback. 3) Cannot be selected during MD playback. · The items with asterisk (*) cannot be selected depending on the situation.
2) 1)
100
101
SECTION 3 DISASSEMBLY
Note : Follow the disassembly procedure in the numerical order given.
1 three screws (BVTT 3 × 8)
3-1. CASE
5 Remove the case in the arrow direction. 4 three screws (case 3 TP2) 2 two screws (BVTT 3 × 8)
3 three screws (case 3 TP2)
3-2. FRONT PANEL SECTION
8 Three screws (BVTP 3 × 8) 3 flat type wire (25core) (CN701)
9 MD mechanism deck section (MDM-7B) 4 flat type wire (15core) (CN305)
qd front panel section
q; Screw (BVTP 3 × 8) qa lug 5 flat type wire (17core) (CN304) 7 connector (CN914) 6 connector (CN1691) 2 flat type wire (11core) (CN503) 1 connector (CN103)
qs three screws (BVTT 3 × 6)
17
3-3. TAPE MECHANISM DECK SECTION (TCM-230AWR12)
2 two screws (BVTP 3 × 8)
1 three screws (BVTP 3 × 8)
3 tape mechanism deck section (TCM-230AWR12)
3-4. BACK PANEL SECTION
5 Remove the back panel section in the arrow direction.
4 three screws (BVTP 3 × 8)
1 flat type wire (13core) (CN502)
3 eleven screws (BVTP 3 × 8) claws 6 connector (CN941) 2 screw (BVTP 3 × 8)
18
3-5. MD MECHANISM DECK SECTION (MDM-7B)
1 three screws (BVTP 3 × 8)
2 plate (B), shield qs two screws (BVTPWH M3), step
5 flat type wire (17core) (CN1004) 6 flat type wire (27core) (CN1003) qa two screws (BVTPWH M3), step
qd MD mechanism deck (MDM-7B)
3 screw (BVTP 3 × 8)
8 two claws 9 DIGITAL board 0 flat type wire (25core) (CN1001) 4 shield (U)
7 screw (BVTP 3 × 8)
3-6. MAIN BOARD, FRONT AMP BOARD
qs two screws (BVTP 3 × 8)
0 connector (CN801) qf two screws (BVTP 3 × 8) qd heat sink
qa two screws (BVTP 3 × 16) 7 two connectors (CN803, CN804) 8 MAIN board
qg Remove the FRONT AMP board in the arrow direction. 1 screw (BVTP 3 × 8)
9 connector (CN913) 5 flat type wire (15core) (CN524)
2 bracket (MD-R) 3 connector (CN713) 4 flat type wire (17core) (CN522)
6 two screws (BVTP 3 × 8)
19
3-7. CD BASE UNIT (BU-K4BD37)
5 CD base unit (BU-K4BD37) 4 two springs (insulator), compression 2 chassis 3 two screws (PTPWH M 2.6)
4 two springs (insulator), compression
3 two screws (PTPWH M 2.6)
1 three screws (BVTP 3 × 6)
3-8. CD MECHANISM DECK SECTION (CDM53F-K4BD37)
3 chassis, sub 5 flat type wire (23 core) 6 screw (BVTP 3 × 8)
8 four screws (sumitite (B3), +BV)
4 flat type wire (15 core)
7 VIDEO board
2 two screws (BVTT 3 × 6)
9 CD mechanism deck section (CDM53F-K4BD37)
1 three screws (BVTT 3 × 6)
20
3-9. FITTING BASE (GUIDE) ASSY, BRACKET (CHASSIS) AND FITTING BASE (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)
3-10. 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)
21
3-11. CHASSIS (MOLD B) SECTION, STOCKER SECTION AND SLIDER (SELECTION)
Note : In mounting the parts, refer to page 23 and 24.
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)
3-12. 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.
22
3-13. 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
3-14. 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
23
3-15. 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)
3-16. BD (MD) BOARD
2 Remove the solder (Two portion) 2 Remove the solder (Two portion) 5 connector (CN101) 2 Remove the solder (Two portion) M101 M103 S102 M102
3 two screws (BTP 2 × 6)
1 connector (CN104) 4 BD board
2 Remove the solder (Three portion)
24
SECTION 4 TEST MODE
[MC Cold Reset] · The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer. Procedure: 1. Press three buttons x , DISPLAY , and DISC 5 simultaneously. 2. The fluorescent indicator tube displays "COLD RESET" and the set is reset. [CD Ship 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 ?/1 button to turn the set ON. 2. Press V-GROOVE button and ?/1 button simultaneously. 3. After the "STANDBY" display blinks six times, a message "LOCK" is displayed on the fluorescent indicator tube, and the CD ship mode is set. [MC Hot Reset] · This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out. Procedure: 1. Press three buttons x , DISPLAY , and DISC 1 simultaneously. 2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset. [CD Service Mode] · This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the optical pick-up. Procedure: 1. Press ?/1 button to turn the set ON. 2. Select the function "CD". 3. Press three buttons x , DISPLAY , and Z 3 simultaneously. 4. The CD service mode is selected. 5. With the CD in stop status, turn the shuttle knob clockwise to move the optical pick-up to outside track, or turn the shuttle knob counter-clockwise to inside track. 6. To exit from this mode, perform as follows: 1) Move the optical pick-up to the most inside track. 2) Press three buttons in the same manner as step 2.
Note: · Always move the optical pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded. · Do not run the sled motor excessively, otherwise the gear can be chipped.
[Change-over of AM Tuner Step between 9 kHz and 10 kHz] · A step of AM channels can be changed over between 9 kHz and 10 kHz. Procedure: 1. Press ?/1 button to turn the set ON. 2. Select the function "TUNER", and press TUNER/BAND button to select the BAND "AM". 3. Press ?/1 button to turn the set OFF. 4. Press MODE SELECT and ?/1 buttons simultaneously, and the display of fluorescent indicator tube changes to "AM 9 k STEP" or "AM 10 k STEP", and thus the channel step is changed over. [GC Test Mode] · This mode is used to check the software version, FL tube, LED, keyboard and VACS. Procedure: 1. Press three buttons x , DISPLAY , and DISC 2 simultaneously. 2. LEDs and fluorescent indicator tube are all turned on. 3. When you want to enter the software version display mode, press DISC 1 . The model number and destination are displayed. 4. Each time DISC 1 is pressed, the display changes starting from MC version, GC version, VC version, CD version, CDM version, ST version, TC version, TA version, TM version and BR version in this order, and returns to the model number and destination display. 5. When DISC 3 is pressed while the version numbers are being displayed except model number and destination, year, month and day of the software creation appear. When DISC 3 is pressed again, the display returns to the software version display. When DISC 1 is pressed while year, month and day of the software creation are being displayed, the year, month and day of creation of the software versions are displayed in the same order of version display. 6. Press DISC 2 button, and the key check mode is activated. 7. In the key check mode, the fluorescent indicator tube displays "K 0 VO 0 STICK N". Each time a button is pressed, "K 0" value increases. However, once a button is pressed, it is no longer taken into account. "VO 0" value increases like 1, 2, 3 ... if rotating VOLUME knob in "+" direction, or it decreases like 0, 9, 8 ... if rotating in "" direction. Moving the stick changes the "STICK N" display. When moved up : "STICK R" When moved down : "STICK r" When moved to the left : "STICK T" When moved to the right : "STICK t" 8. Also when DISC 3 is pressed after lighting of all LEDs and FL tubes, value of VACS appears. 9. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.
[VACS ON/OFF Mode] · This mode is used to switch ON and OFF the VACS (Variable Attenuation Control System). Procedure: Press the PUSH ENTER and x buttons simultaneously. The message "VACS OFF" or "VACS ON" appears.
25
[MC Test Mode] · This mode is used to check operations of the respective sections of Amplifier, Tuner, CD and Tape. Procedure: 1. Press the ?/1 button to turn on the set. 2. Press the three buttons of x , DISPLAY and DISC 3 simultaneously. 3. A message "TEST MODE" appears on the FL display tube. 4 When the multi-stick is moved up, GEQ increases to its maximum and a message "GEQ MAX" appears. 5. When the multi-stick is moved down, GEQ decreases to its minimum and a message "GEQ MIN" appears. 6. When the multi-stick is moved left or right, GEQ is set to flat and a message "GEQ FLAT" appears. 7. When the VOLUME control knob is turned clockwise even slightly, the sound volume increases to its maximum and a message "VOLUME MAX" appears for two seconds, then the display returns to the original display. 8. When the VOLUME control knob is turned counter-clockwise even slightly, the sound volume decreases to its minimum and a message "VOLUME MIN" appears for two seconds, then the display returns to the original display. 9. In the test mode, the default-preset channel is called even when the TUNER is selected and an attempt is made to call the preset channel that has been stored in memory, by operating the Shuttle knob. (It means that the memory is cleared.) 10. When CD is selected and press MODE SELECT , and press PUSH ENTER when "Set up Mode" is displayed. Press PUSH ENTER when "CD Set up?" is displayed. Move the stick left and right to display "CD Edit Start?", and press PUSH ENTER , the disc that is being chucked at this moment becomes the default setting. It means that the default disc only is accessed when any other discs are selected even though the display indication changes accordingly. At the same time, the Z1 to Z5 cannot be accepted. (It means that the tray motor and the turntable motor are disabled of their operation.) 11. When a tape is inserted in Deck B and recording is started, the input source function selects VIDEO automatically. 12. When x button is pressed to stop recording, the Tape (Deck) B is selected and tape is rewound using the m button, tape is rewound, tape is stops at around the record-starting position and playback of the recorded portion of the tape is started. If PAUSE is inserted even once during recording, tape is rewound to the position around the PAUSE position and is played back. 13. When the HIGH-SPEED CD-MD SYNC Button is press during playback of Deck B, either normal speed or high speed can be selected by this button. 14. Select the desired loop by pressing MODE SELECT , and press PUSH ENTER when "Set up Mode" is displayed. Press PUSH ENTER when "CD Set up?" is displayed. Move the stick left and right to display "Tape Set Up?", and press PUSH ENTER . Press PUSH ENTER when "Direction Set Up?" is displayed. Move the stick left and right to display "Cycle?", and press PUSH ENTER . Insert a test tape AMS-110A or AMS-RO to Deck A. 15. Press the SYNC REC button to enter the AMS test mode. 16. After a tape is rewound first, the FF AMS is checked, and the mechanism is shut off after detecting the AMS signal twice. 17. Then the REW AMS is checked and the mechanism is shut off after detecting the AMS signal twice. 18. When the check is complete, a message of either OK or NG appears. 19. When you want to exit this mode, press the ?/1 button twice. The cold reset is enforced at the same time.
26
[Aging Mode] This mode can be used for operation check of CD section and tape deck section. · If an error occurred: The aging operation stops and display status. · If no error occurs: The aging operation continues repeatedly. 1. Operating method of Aging Mode Turn on the main power and select "CD" of the function. 1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF. 2) Load the tapes recording use into the decks A and B respectively. 3) Press three buttons x , DISPLAY , and DISC 4 simultaneously. 4) Aging operations of CD and tape are started at the same time. · Tape Deck 1. The tape in deck A is rewound. "TAPE A AG-1" is displayed. 2. The FWD side of deck A is played for two minutes. "TAPE A AG-2" is displayed. 3. The tape in deck A is fast forwarded. "TAPE A AG-3" is displayed. Fast forward is carried out for 20 seconds or to the tape end. 4. The RVS side of deck A is played for two minutes. "TAPE A AG-4" is displayed. 5. The tape in deck A is rewound. "TAPE A AG-5" is displayed. 6. The FWD side of deck B is played for two minutes. "TAPE B AG-2" is displayed. 7. The tape in deck B is fast forwarded. "TAPE B AG-3" is displayed. Fast forward is carried out for 20 seconds or to the tape end. 8. The RVS side of deck B is played for two minutes. "TAPE B AG-4" is displayed. 9. The tape in deck A is rewound. "TAPE A AG-5" is displayed. 10. Repeated from step 2. · CD 1. The tray rotates. 2. DISC 5 is chucked. 3. The TOC is read. 4. The first track is played for 3 seconds. 5. The last track is played for 3 seconds. 6. DISC 1 is open. 7. DISC 1 is close. 8. Repeated from step 2.
2. Ending the Aging Mode 1) End the Aging Mode with the power off. 2) To reset the CD error history, be sure to perform cold reset.
27
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 MD Z 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 CLEAR button while REC IT is lit, and press the MD Z button while REC IT is off after the disc stops rotating. 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 MD REC button.
4-2. SETTING THE TEST MODE
The following are two methods of entering the test mode. Procedure 1: In the power ON state, set the function to MD, and while pressing the DISPLAY and x buttons together, press V-GROOVE . When the test mode is set, "[Check]" will be displayed. Move the multi-stick to switch between the following three groups; ··· y Check y Service y Develop y ···. Procedure 2: In the power ON state, set the function to MD, and while pressing the DISPLAY and x buttons together, press the NAME EDIT/CHARACTER button. When the test mode is set, "AUTO CHECK" will be displayed. By setting the test mode using this method, only the "Check" group of method 1 can be executed. 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 CLEAR button while REC IT is lit, immediately to exit the [Develop] group.
4-3. EXITING THE TEST MODE
Press the MD Z button while REC IT is off. The disc is ejected when loaded, and "Standby" display blinks, and the STANDBY state is set.
4-4. BASIC OPERATIONS OF THE TEST MODE
Operate using the multi-stick, PUSH ENTER button, MD REC MODE button, CLEAR button, NAME EDIT/CHARACTER button.
Function name Function
CLEAR button (When REC IT is lit) PUSH ENTER button Mulit stick (Left or Right) MD REC MODE button (When REC IT is lit) NAME EDIT/CHARACTER button
Cancel or move to top hierarchy Set Select Set submenu Switching of button operations (REC IT lights up/goes off)
28
4-5. SELECTING THE TEST MODE
There are 26 types of test modes as shown below. The groups can be switched by moving the multi-stick. After selecting the group to be used, press the PUSH ENTER button. After setting a certain group, move the multi-stick to switche 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 CLEAR button while REC IT is lit, 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
Details
Mark
Check
Service
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
· For details of each adjustment mode, refer to "6. 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 CLEAR button while REC IT is lit, 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 CLEAR button while REC IT is lit, to exit the mode immediately.
29
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 Move the multi-stick and display "CPLAY1MODE"(C34). 3 Press the PUSH ENTER button to change the display to "CPLAY1MID". 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 PUSH ENTER button during continuous playback to change the display as below. "CPLAY1MID" t "CPLAY1OUT" t "CPLAY1IN" 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 CLEAR button while REC IT is lit. The display will change to "CPLAY1MODE"(C34). 2 To remove the disc, press the MD Z button while REC IT is off. 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 Move the multi-stick and display "CREC 1MODE" (C35). 3 Press the PUSH ENTER button to change the display to "CREC 1MID". 4 When access completes, the display changes to "CREC1 ( )" and MD REC lights up. Note : The numbers " " displayed shows you the recording position addresses. 2. Changing the parts to be recorded 1 When the PUSH ENTER button is pressed during continuous recording, the display changes as below. "CREC 1MID" t "CREC 1OUT" t "CREC 1IN" When pressed another time, the parts to be recorded can be changed. MD REC goes off. )" and MD REC lights up. 2 When access completes, the display changes to "CREC 1( Note : The numbers " " displayed shows you the recording position addresses. 3. Ending the continuous recording mode 1 Press the CLEAR button while REC IT is lit. The display changes to "CREC 1MODE" (C35 ) and MD REC goes off. 2 To remove the disc, press the MD Z button while REC IT is off. 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 : Press the CLEAR button while REC IT is lit 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.
30
4-6. FUNCTIONS OF OTHER BUTTONS
Function PUSH ENTER CLEAR J (FF) j (FR) REC MODE REC HIGH SPEED CD-MD EJECT REC IT Lit Off Off Off Off Off Lit Off Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, the tracking servo turns ON/OFF. 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. (When No disc)
4-7. TEST MODE DISPLAYS
Each time the HIGH SPEED CD-MD SYNC 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) h= s= (MO pit and CD) h= a= (MO groove) 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)
31
4-8. MEANINGS OF OTHER DISPLAYS
Contents Display LP2 LP4 MD REC TRACK L.SYNC OVER TOC REPEAT MD PLAY (LED) DISC x1 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 PUSH ENTER 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 PUSH ENTER button. 2. The software version will be displayed. 3. Press the CLEAR button while REC IT is lit 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 x button and MD Z button together while REC IT is off. 4. Move the multi-stick and select MDM-7B. 5. Press the MD REC MODE button while REC IT is lit. 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.
32
SECTION 5 MECHANICAL ADJUSTMENTS
Precaution 1. Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement
Mode FWD FWD back tension REV REV back tension FF/REW Torque meter CQ-102C Meter reading 3.04 6.96 N · m (31 to 71 g · cm) (0.43 0.98 oz · inch) 0.20 0.58 N · m (2 to 6 g · cm) (0.02 0.08 oz · inch) 3.04 6.96 N · m (31 to 71 g · cm) (0.43 0.98 oz · inch) 0.20 0.58 N · m (2 to 6 g · cm) (0.02 0.08 oz · inch) 6.97 14.02 N · m (71 to 143 g · cm) (0.98 1.99 oz · inch) 0.98 N · m or more (100 g or more) (3.53 oz or more) 0.98 N · m or more (100 g or more) (3.53 oz or more)
SECTION 6 ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head demagnetizer. 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjusted. 4. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.) 6. The adjustments should be performed for both L-CH and R-CH. 7. Switches and controls should be set as follows unless otherwise specified.
Tape P-4-A100 WS-48B P-4-L300 Signal 10 kHz, 10 dB 3 kHz, 0 dB 315 Hz, 0 dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment
CQ-102C
CQ-102RC
Record/Playback Head Azimuth Adjustment (Deck A, Deck B) Note: Perform this adjustments for both decks. Procedure: 1. Mode : Playback
test tape P-4-A100 (10kHz, 10dB)
CQ-102RC
CQ-201B
FWD tension
CQ-403A
REV tension
CQ-403R
main board CN302 Pin 1 (L-ch) Pin 3 (R-ch) set
level meter
+
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.
L-CH peak
output level
within 1 dB
within 1dB
screw position
R-CH peak screw position
L-CH peak
R-CH peak
33
3. Mode: Playback
test tape P-4-A100 (10kHz, 10dB) main board CN302 Pin 1 (L-ch) Pin 2 (GND) L set R
oscilloscope
normal speed. 6. Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz. 7. Press the "/1 button, after the turned ON. 8. Insert the WS-48B into deck A, and insert the normal tape into deck B. 9. Press the SYNC REC button and display "TAPE A t B HIGHSPEED" and then press the REC button to start recording. 10.Press the x button. 11.Press the H button of deck B and check the reading of frequency counter becomes 3000 ± 90 Hz. Adjustment Location: LEAF SW board Sample Value of Wow and flutter W.RMS (JIS) less than 0.3% (test tape: WS-48B)
Pin 3 (R-ch) Waveform of oscilloscope
in phase
45° good
90°
135°
180° wrong
Playback Level Adjustment (Deck A, Deck B) Procedure: Mode: Playback Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within the following adjustment level. Adjustment level: CN302 playback level: 301.5 to 338.3 mV (8.2 to 7.2 dB) level difference between the channels: within ± 0.5 dB Adjustment Location: AUDIO board
4. After the adjustments, apply suitable locking compound to the parts adjusted. Adjustment Location: Playback Head (Deck A) Record/Playback/Erase Head (Deck B)
test tape P-4-L300 (315Hz, 0dB) set
level meter
Reverse
Foward
main board CN302 Pin 1 (L-ch) Pin 3 (R-ch)
Tape Speed Adjustment (Deck A) Note: Set the test mode using the following method and begin tape speed adjustment. In the test mode, the speed will switch to double speed or normal speed each time the HIGH-SPEED CD-MD SYNC button is pressed. Procedure: With the power turned ON, press the x button, DISPLAY button, and DISC 3 button simultaneously. (The "VOLUME" on the fluorescent display tube will blink while in the test mode.) To exit the test mode, press the "/1 button. 1. Insert the WS-48B into deck B. 2. Press the H button of deck B. 3. Press the HIGH-SPEED CD-MD SYNC button and play the tape at double speed. 4. Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz. 5. Press the HIGH-SPEED CD-MD SYNC button and play the tape at Adjustment Location [LEAF SW BOARD]
RV1001(High Speed) RV1002(Normal Speed)
RV1002
RV1001
34
Record Bias Adjustment (Deck B) Procedure: INTRODUCTION When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the "REC memory mode" which rewinds only the recorded portion and playback is set. This "REC memory mode" is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO. (After recording, press the m button without stopping will return to the position where recording was started.) 1. Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.) 2. Insert a tape into deck B, press the TAPE REC PAUSE/START button, and then press the H button to start recording. 3. Mode: Record
VIDEO (AUDIO) IN 1) 315 Hz } 50 mV (23.8 dB) 2) 10 kHz AF OSC 600 attenuator set blank tape CS-123
Record Level Adjustment (Deck B) Procedure: INTRODUCTION When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the "REC memory mode" which rewinds only the recorded portion and playback is set. This "REC memory mode" is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO. (After recording, press the m button without stopping will return to the position where recording was started.) 1. Press FUNCTION button to select VIDEO. (This step is not necessary if the above test mode has already been set.) 2. Insert a tape into deck B, press the TAPE REC PAUSE/START button, and then press the H button to start recording. 3. Mode: Record
VIDEO (AUDIO) IN 315Hz 50 mV (23.8 dB) AF OSC 600 attenuator set blank tape CS-123
4. Mode: Playback
recorded position level meter
4. Mode: Playback
recorded position level meter
set main board CN302 Pin 1 (L-ch) Pin 3 (R-ch)
set main board CN302 Pin 1 (L-ch) Pin 3 (R-ch)
5. Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the RV341 (L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4. Adjustment level: The playback output of 10 kHz level difference against 315 Hz reference should be 0 ± 0.5 dB. Adjustment Location: AUDIO board Adjustment Location: [AUDIO BOARD]
5. Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the RV301 (L-CH) and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4. Adjustment level: CN302 playback level: 47.2 to 53.0 mV (24.3 to 23.3 dB) Adjustment Location: MAIN board [MAIN BOARD]
RV341(Lch),RV441(Rch) Record Bias
RV311(Lch),RV411(Rch) Playback Level (Deck A)
RV301 CN302 RV351
3 1
Record Level (L ch) IC301
RV301 RV401 RV441 RV341 RV311 RV411
Record Level (R ch)
RV301(Lch),RV401(Rch) Playback Level (Deck B)
35
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 10M 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. S-Curve Check
Note : Clear RF signal waveform means that the shape " " can be clearly distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns
Level : 1.45 ± 0.3Vp-p
E-F Balance (1 Track jump) Check
Oscilloscope BD board TP(FEO) TP(VC)
Oscilloscope BD board TP(TEO) TP(VC)
Procedure : 1. Connect oscilloscope to TP (FEO). 2. Connect between TP (FEI) and TP (VC) by lead wire. 3. Connect between TP (AGCCON) and TP (GND) by lead wire. 4. Turn ?/1 button on. 5. Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search) 6. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 4 ±1 Vp-p.
S-curve waveform Symmetry
Procedure : 1. Connect oscilloscope to TP (TEO) and TP (VC). 2. Turned ?/1 button on. 3. Load a disc (YEDS-18) and playback the number five track. 4. Press the u button. (Becomes the 1 track jump mode.) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform Center of waveform B 0V A (DC voltage)
A Wthin 4 ±1Vp-p B
Level=1.3 ±0.6 Vp-p Symmetry Specified level: A × 100 = less than ± 22 % B
6. After check, remove the lead wire connected in step 1. 7. After check, remove the lead wire connected in step 2 and 3. Note : · Try to measure several times to make sure than the ratio o