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Service Manual
CD RECORDER DR6050
Recordable
ReWritable
DR6050 /F1N, /K1G, /N1G
/F1B, /K1B, /N1B, /U1B
Compact Disc Recorder
DR6050
STANDBY
STORE/MENU
EASY JOG
CANCEL/DELETE
POWER
ON/OFF
STOP REC
PLAY/PAUSE
CDR
OPEN/ CLOSE
OPEN/ CLOSE CD REC TYPE SOURCE ERASE FINALIZE
STOP
PLAY/PAUSE
DJ MODE PHONES
PUSH ENTER
REMARK : This service manual explains them by extracting specifications designed for the model DR6050 only. The explanation for CD-R module "MAR775" (Loader : CDL4009' + CD-R Main board) is not mentioned on this service manual. The CD-R module information is described in the service manual of CD-R modules .
TABLE OF CONTENTS SECTION PAGE MAIN UNIT 1. Servicing the DR6000 ................................................................................................................................ 1 2. TECHNICAL SPECIFICATIONS ............................................................................................................... 3 3. WARNINGS .............................................................................................................................................. 4 4. SERVICE HINTS ....................................................................................................................................... 5 5. SERVICE TOOLS ..................................................................................................................................... 5 6. SIAGNOSTIC SOFTWARE ....................................................................................................................... 6 7. FAULTFINDING TREES ......................................................................................................................... 10 8. FAULTFINDING GUIDE .......................................................................................................................... 16 9. WIRING DIAGRAM ................................................................................................................................. 32 10. BLOCK DIAGRAM ................................................................................................................................... 35 11. SCHEMATIC DIAGRAM AND PARTS LOCATION ................................................................................. 37 12. EXPLODED VIEW AND PARTS LIST ..................................................................................................... 43 13. ELECTRICAL PARTS LIST ..................................................................................................................... 46
Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
R
DR6050
Printed in Japan 386K855010 MIT 3120 785 22370 First Issue 2000.12
MARANTZ DESIGN AND SERVICE
Using superior design and selected high grade components, MARANTZ company has created the ultimate in stereo sound. Only original MARANTZ parts can insure that your MARANTZ product will continue to perform to the specifications for which it is famous. Parts for your MARANTZ equipment are generally available to our National Marantz Subsidiary or Agent.
ORDERING PARTS :
Parts can be ordered either by mail or by Fax.. In both cases, the correct part number has to be specified. The following information must be supplied to eliminate delays in processing your order : 1. Complete address 2. Complete part numbers and quantities required 3. Description of parts 4. Model number for which part is required 5. Way of shipment 6. Signature : any order form or Fax. must be signed, otherwise such part order will be considered as null and void.
USA
MARANTZ AMERICA, INC INC. 440 MEDINAH ROAD ROSELLE, ILLINOIS 60172 USA PHONE : 630 - 307 - 3100 FAX : 630 - 307 - 2687
EUROPE / TRADING
MARANTZ EUROPE B.V. P.O.BOX 80002, BUILDING SFF2 5600 JB EINDHOVEN THE NETHERLANDS PHONE : +31 - 40 - 2732241 FAX : +31 - 40 - 2735578
BRAZIL
PHILIPS DA AMAZONIA IND. ELET. ITDA CENTRO DE INFORMACOES AO CEP 04698-970 SAO PAULO, SP, BRAZIL PHONE : 0800 - 123123(Discagem Direta Gratuita) FAX : +55 11 534. 8988
AMERICAS
SUPERSCOPE TECHNOLOGIES, INC. MARANTZ PROFESSIONAL PRODUCTS 2640 WHITE OAK CIRCLE, SUITE A AURORA, ILLINOIS 60504 USA PHONE : 630 - 820 - 4800 FAX : 630 - 820 - 8103
AUSTRALIA
TECHNICAL AUDIO GROUP PTY, LTD 558 DARLING STREET, BALMAIN, NSW 2041, AUSTRALIA PHONE : 61 - 2 - 9810 - 5300 FAX : 61 - 2 - 9810 - 5355
CANADA
LENBROOK INDUSTRIES LIMITED 633 GRANITE COURT, PICKERING, ONTARIO L1W 3K1 CANADA PHONE : 905 - 831 - 6333 FAX : 905 - 831 - 6936
AUSTRALIA
QualiFi Pty Ltd, 24 LIONEL ROAD, MT. WAVERLEY VIC 3149 AUSTRALIA PHONE : +61 - (0)3 - 9543 - 1522 FAX : +61 - (0)3 - 9543 - 3677
THAILAND
MRZ STANDARD CO.,LTD 746 - 754 MAHACHAI ROAD., WANGBURAPAPIROM, PHRANAKORN, BANGKOK, 10200 THAILAND PHONE : +66 - 2 - 222 9181 FAX : +66 - 2 - 224 6795
SINGAPORE
WO KEE HONG DISTRIBUTION PTE LTD 130 JOO SENG ROAD #03-02 OLIVINE BUILDING SINGAPORE 368357 PHONE : +65 858 5535 / +65 381 8621 FAX : +65 858 6078
NEW ZEALAND
WILDASH AUDIO SYSTEMS NZ 14 MALVERN ROAD MT ALBERT AUCKLAND NEW ZEALAND PHONE : +64 - 9 - 8451958 FAX : +64 - 9 - 8463554
TAIWAN
PAI- YUING CO., LTD. 6 TH FL NO, 148 SUNG KIANG ROAD, TAIPEI, 10429, TAIWAN R.O.C. PHONE : +886 - 2 - 25221304 FAX : +886 - 2 - 25630415
MALAYSIA
WO KEE HONG ELECTRONICS SDN. BHD. SUITE 8.1, LEVEL 8, MENARA GENESIS, NO. 33, JALAN SULTAN ISMAIL, 50250 KUALA LUMPUR, MALAYSIA PHONE : +60 3 - 2457677 FAX : +60 3 - 2458180
JAPAN Technical MARANTZ JAPAN, INC. 35- 1, 7- CHOME, SAGAMIONO SAGAMIHARA - SHI, KANAGAWA JAPAN 228-8505 PHONE : +81 42 748 1013 FAX : +81 42 741 9190
KOREA
MK ENTERPRISES LTD. ROOM 604/605, ELECTRO-OFFICETEL, 16-58, 3GA, HANGANG-RO, YONGSAN-KU, SEOUL KOREA PHONE : +822 - 3232 - 155 FAX : +822 - 3232 - 154
SHOCK, FIRE HAZARD SERVICE TEST :
CAUTION : After servicing this appliance and prior to returning to customer, measure the resistance between either primary AC cord connector pins ( with unit NOT connected to AC mains and its Power switch ON ), and the face or Front Panel of product and controls and chassis bottom. Any resistance measurement less than 1 Megohms should cause unit to be repaired or corrected before AC power is applied, and verified before it is return to the user/customer. Ref. UL Standard No. 1492.
In case of difficulties, do not hesitate to contact the Technical Department at above mentioned address.
001120MIT
1. Servicing the DR6050
1.1 INTRODUCTION:
The DR6050 is the consumer version of a CD recorder, this means that the SCMS (Serial Copy Management System) is included. The DR6050 can only record on the Audio CDRs (Consumer Use). The DR6050 is suitable for recording and playback of CD-R W discs (CD-Re Writable disc).
Playback & Recording and Disc
Disc CD Player/Recorder
Audio CD Player Current products Ex:CD-17 Audio CD Player CD-RW playback Ex:CD-17MK II CD-RW Recorder For Professional Ex:CDR630/640 CD-RW Recorder For Consumer Ex:DR6050
CDR
CD-RW
Professional Disc SCMS Professional Disc Consumer Disc Consumer Disc non non non non Finalized Finalized Finalized Finalized Finalized Finalized Finalized Finalized
P P P P
P P P P
no no P/R P/R
P P P P
no no P/R P
no P P/R P/R
no no P/R P/R
no P P/R P
no no P/R P
no YES
Consumer Professional P R
: For Digital Audio : For General use (Including PC) : Playback : Recording
1.2 OPENING THE PRODUCT :
The product can be opened by removing the top cover (6 screws). Once the product is opened one can have access to the several PCB's and the main module.
Power Supply PCB Terminal PCB
CDR Module MAR775
CD Loder VAL1250
DISPLAY PCB
PHONE BOARD
Below the several PCB's and it function and service policy will be discussed:
1
1.2.1 CDR loader (CDR main module CDL4009 or MAR770):
This complete CDR loader is considered as not repairable in the field. therefore this module will be repaired centrally. A module exchange procedure will be set up for this purpose. The module can be removed from the product by removing 4 screws and the transformer (see demounting the CDR module on page 1-7), and loosing the connectors. This module is the complete CD recorder, it contains the following parts: CD Mechanism (CDM4009'). Underneath this mechanism a PCB is mounted which is adjusted to the mechanism (laser current settings are stored in EEPROM). Loader Assy. This mechanical assy takes care for the tray control. Main PCB. This PCB takes care that the (analog or digital) signal to be recorded is converted into a suitable signal which can be recorded on the disc. Digital signals with an other sampling frequency then 44.1kHz will be converted in the sample rate converter (DASP) to 44.1kHz. Analog signals will be first converted into a digital converter by the AD converter. This PCB also takes care that the signal from the CD (playback) is converted into a suitable digital signal (or analog via the DA converter). The main microprocessor controls the several functions of this PCB.
1.2.2 Power Supply PCB.
This PCB contains the Power SW, which is jointed the Power bottom on the front panel. This PCB consists of power supply part. The power suppluy part delivers the several voltages for the diffrent PCB in the DR6050. On this power supply one fuse (primary side) is mounted on this PCB. All parts are available as spare parts.
1.2.3 Terminal PCB.
This PCB coutaius input and output terminals. All parts are available as spare parts.
1.2.4 Display Board.
This PCB contains the Display, which informs the user about the status of the recording/playback process and it also takes care for scanning the keys on the front panel. The information from the keys is fed via a I 2 C connection to the main microprocessor on the CDR loader module. Information which needs to be displayed is also fed via this I 2 C line from the main microprocessor on the CDR loader module to the display controller. The parts for this PCB are available as service parts so this PCB can be repairable up to component level.
1.2.5 Headphone PCB.
This PCB contains the headphone socket.
IMPORTANT
In case of replace the CD-R module "MAR775", the initialization is necessary. Please initialize the CD-R module with following orders. 1. Press the POWER button (POWER ON) while depressing FINALIZE button and REC TYPE button together. 2. FL Display shows; PGM PROTOCOL PGM PORT END WAIT 3. Press the POWER button (POWER OFF). Then the CD-R module set up to DR6050 own status.
2
2 TECHNICAL SPECIFICATIONS
GENERAL System .................................................................................................... Compact disc digital audio Number of channels ................................................................................ 2 (stereo) Applicable discs ...................................................................................... CD, CD-R (digital audio), CD-RW (digital audio) Power Requirement F version ........................................................................................... AC 100 V 50 / 60 Hz K version ........................................................................................... AC 110 V / 220 V 50 /60 Hz N version ........................................................................................... AC 230 V 50 Hz U version. .......................................................................................... AC 120 V 60 Hz Power Consumption ................................................................................ 20 W Operating Temperature . ......................................................................... 5 ° C - 35 ° C Dimension (MAX) Width ................................................................................................. 440 mm Height ................................................................................................ 87 mm Depth ................................................................................................ 317 mm Weight ................................................................................................ 4.4 kg AUDIO Frequency Response .............................................................................. 20 Hz - 20 kHz Playback S/N .......................................................................................... 100 dB Playback Dynamic Range ....................................................................... 96 dB Playback Total Harmonic Distortion ........................................................ 0.003 % Recording S/N ......................................................................................... 90 dB Recording Dynamic Range ..................................................................... 92 dB Recording Total Harmonic Distortion ...................................................... 0.006 % Analog Output Voltage ............................................................................ 2 V RMS Digital Coaxial Output ............................................................................. 0.5 V (p-p) / 75 ohms Digital Optical Output .............................................................................. - 20 dB Headphones ............................................................................................ 0 - 5 Vrms / 8 - 2000 ohms Recording values for line input Digital Coaxial Input (automatic sample rate conversion) ....................... 32 - 48 kHz Digital Optical Input (automatic sample rate conversion) ........................ 32 - 48 kHz Analog Input ............................................................................................ 600 mVrms / 50 kohms
Specifications subject to change without prior notice.
3
3. WARNINGS
WARNING
All ICs and many other semiconductors are susceptible to electrostatic discharges (ESD). Careless handling during repair can reduce life drastically. When repairing, make sure that you are connected with the same potential as the mass of the set via a wristband with resistance. Keep components and tools at this potential.
ESD
WAARSCHUWING
Alle IC´s en vele andere halfgeleiders zijn gevoelig voor electrostatische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen vermindern. Zorg ervoor dat u tijdens reparatie via een polsband met weerstand verbonden bent met hetzelfde potentiaal als de massa van het apparaat. Houd componenten en hulpmiddelen ook op ditzelfde potentiaal.
ATTENTION
Tous les IC et beaucoup d´autres semi-conducteurs sont sensibles aux décharges statiques (ESD). Leur longévite pourrait être considérablement écourtée par le fait qu´aucune précaution nést prise à leur manipulation. Lors de réparations, s´assurer de bien être relié au même potentiel que la masse de l´appareil et enfileer le bracelet serti d´une résistance de sécurité. Veiller à ce que les composants ainsi que les outils que l´on utilise soient également à ce potentiel.
AVVERTIMENTO WARNUNG
Alle ICs und viele andere Halbleiter sind empfindlich gegenüber elektrostatischen Entladungen (ESD). Unsorgfältige Behandlung im Reparaturfall kann die Lebensdauer drastisch reduzieren. Sorgen Sie dafür, daß sie im Reparaturfall über ein Pulsarmband mit Widerstand mit dem Massepotential des Gerätes verbunden sind. Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem Potential. Tutti IC e parecchi semi-conduttori sono sensibili alle scariche statiche (ESD). La loro longevità potrebbe essere fortemente ridatta in caso di non osservazione della più grande cauzione alla loro manipolazione. Durante le riparationi occorre quindi essere collegato allo stesso potenziale che quello della massa delápparecchio tramite un braccialetto a resistenza. Assicurarsi che i componenti e anche gli utensili con quali si lavora siano anche a questo potenziale.
AVAILABLE ESD PROTECTION EQUIPMENT :
anti-static table mat large small 1200x650x1.25mm 600x650x1.25mm anti-static wristband connection box (3 press stud connections, 1M ) extendible cable (2m, 2M , to connect wristband to connection box) connecting cable (3m, 2M , to connect table mat to connection box) earth cable (1M , to connect any product to mat or to connection box) KIT ESD3 (combining all 6 prior products - small table mat) wristband tester 4822 466 10953 4822 466 10958 4822 395 10223 4822 320 11307 4822 320 11305 4822 320 11306 4822 320 11308 4822 310 10671 4822 344 13999
SAFETY
Safety regulations require that the set be restored to its original condition and that parts which are identical with those specified be used. Safety components are marked by the symbol Veiligheidsbepalingen vereisen, dat het apparaat in zijn oorspronkeliijke toestand wordt teruggebracht en dat onderdelen, identiek aan de gespecificeerde, worden toegepast. De Veiligheidsonderdelen zijn aangeduid met het symbool
Les normes de sécurité exigent que l`appareil soit remis à l`état d`origine et que soient utilisées les pièces de rechange identiques à celles spécifiées. Les composants de sécurité sont marqués
Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu beachten. Der Originalzustand des Gerätes darf nicht verändert werden. Für Reparaturen sind Originalersatzteile zu verwenden. Sicherheitsbauteile sind durch das Symbol markiert.
Le norme di sicurezza estigono che l´apparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambiago identici a quelli specificati. Componenty di sicurezza sono marcati con
U : VERSION CLASS III b LASER PRODUCT
N : VERSION CLASS 3B LASER PRODUCT
DANGER: Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.
Varning !
Osynlig laserstrålning när apparaten är öppnad och spärren är urkopplad. Betrakta ej strålen.
Advarsel !
Usynlig laserstråling ved åbning når sikkerhedsafbrydere er ude af funktion. Undgå udsaettelse for stråling.
Varoitus !
Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina näkymättömälle laserisäteilylle. Älä katso säteeseen !
After servicing and before returning the set to customer perform a leakage current measurement test from all exposed metal parts to earth ground, to assure no shock hazard exists. The leakage current must not exceed 0.5mA.
"Pour votre sécurite, ces documents doivent être utilisés par des spécialistes agréés, seuls habilités à réparer votre appareil en panne".
4
4. SERVICE HINTS
5. SERVICE TOOLS
Audio signals disc Disc without errors (SBC444)+ Disc with DO errors, black spots and fingerprints (SBC444A) Disc (65 min 1kHz) without no pause Max. diameter disc (58.0 mm) Torx screwdrivers Set (straight) Set (square) 13th order filter Hexagon socket screw button (No. 1.5) 4822 397 30184 4822 397 30245 4822 397 30155 4822 397 60141 4822 395 50145 4822 395 50132 4822 395 30204
5
6.
6.1
Diangostic Software
Dealer mode
The purpose of the dealer mode is to prevent people taking out the CD inside the player at exhibitions, showrooms etc.. This mode disables the open/close function of the player. The dealer mode can be switched on and off pressing keys [OPEN/CLOSE] and [STOP] of the CDR player simultaneously while switching on the unit. The dealer mode is stored in the flash memory and can only be changed by executing the above actions. 6.2.2 Requirements to perform the test · · Working keyboard to start up the test. Working local display to check the output messages.
6.2
Dealer diagnostics
DEALER DIAGNOSTICS
(status of player)
If power ON, switch power OFF
Press + simultaneously and switch ON unit
Display blinks "B USY" during test
NO Set OK? YES Set displays "PASSED" Set displays " ERROR"
To end test, switch OFF unit
CL96532086-024.eps 090999
Figure 6-1 6.2.1 Description The intention of the dealer diagnostics is to give an indication of the CDR player status. An inexperienced, even nontechnical dealer will/can perform the test. Tests are executed automatically without need for external tools or disassembly of the unit. This test checks the CDR main board using the same tests as the electrical service diagnostics program. Only the result of the test, "PASSED" or "ERROR", will be shown on the display. Pressing keys [F FWD] and [REWIND] simultaneously while switching on the unit, starts the test. Switching off the unit ends the test.
6
6.3
Electrical service diagnostics
ELECTRICAL SERVICE DIAGNOSTICS
(software versions, test for defective components)
If power ON, switch power OFF
Load CD-DA disc (SBC444A) Press + simultaneously and switch ON unit
PLAYER INFORMATION
Display :
LOADER TESTS
ABORT TEST CDR LOADER TEST CD-DA disc must be loaded Display shows current disc time
"PLAYER ID" "SW VERSION BACK END" "SW VERSION CDR LOADER"
(CDR775 "SW VERSION CD LOADER")
CDR MAIN BOARD TEST
Display : "DTST1" DRAM test (7702) PASS OR FAIL Display : "DTST2" FLASH CHECKSUM test (7702) PASS OR FAIL Display : "DTST3" FLASH ERASE test (7702) PASS OR FAIL Display : "DTST4" CODEC test (7702) PASS OR FAIL Display : "DTST5" CDR LOADER COMMUNICATION test PASS OR FAIL Display : "DTST6" * CD LOADER COMMUNICATION test PASS OR FAIL ABORT TEST Press ABORT TEST Press ABORT TEST YES ABORT TEST ABORT TEST Press Press YES ABORT TEST Press Test OK?
NO
Display : "BERR1" or "NO CDDA" or "NO DISC"
Press CD LOADER TEST * CD-DA disc must be loaded Display shows current disc time
* FOR CDR775 ONLY
NO Press Test OK?
Display : "BERR2" or "NO CDDA" or "NO DISC"
DISPLAY TEST
Press DISPLAY TEST Display segments blink at f=1kHz
Press
KEYBOARD & RC TEST
Press
KEYBOARD & RC TEST Display shows name of pressed keys
* FOR CDR775 ONLY
To end test, switch OFF unit NO Tests OK? YES Display : "DERRn" n = failed test
Display next failed test
CL 96532086_025.eps 080999
Figure 6-2
7
6.3.1
Description The intention of the electrical service diagnostics is to show the software versions present in the player and to direct the dealer towards defective internal units. The units are : the CDR main board, the CDR loader, the CD loader in case of a DR6050 and the keyboard/display board. A sequence of tests is executed automatically. Some of the tests can be aborted or skipped without the result being taken into account. External tools or disassembly of the unit is not necessary to get the diagnostic information. Pressing keys [PLAY/PAUSE] and [F FWD] simultaneously while switching on the unit, starts the test. Switching off the unit ends the test.
disc test is executed to check focus control, disc motor control, radial control and jump grooves control. The disc test is performed by audio play-back of 5 seconds at the beginning, middle and end of the disc.
CDR loader test During the test, the current disc time is shown. In case of an error the message "BERR1" will be displayed and the [F FWD] key must be pressed to continue with the following test. Pressing the [F FWD] key also aborts this test. CD loader test For DR6050 only. During the test, the current disc time is shown. In case of an error the message "BERR2" will be displayed and the [F FWD] key must be pressed to continue with the following test. Pressing the [F FWD] key also aborts this test. Display test All segments will blink at a frequency of 1 Hz. Pressing the [F FWD] key will start the next test because the user has to check for himself if all segments work properly. Keyboard and remote control tests The test will give the user the ability to test every key without executing the function assigned to it. Therefore, the user needs to press every key on the keyboard and the remote control. The display will show the name of the key being pressed. Pressing more than one key at once will give an unpredictable result except for the service combinations : [PLAY/PAUSE] + [STOP], [PLAY/PAUSE] + [F FWD], [F FWD] + [REWIND], [ERASE] + [RECORD], [PLAY/PAUSE] + [RECORD].
6.3.2
Requirements to perform the test Working keyboard to start up the test. Working local display to check the output messages. A CD-DA disc with a minimum of 3 tracks in all trays to perform the disc test.
6.3.3
Description of the tests
Player information In this part of the test the following important information can be checked without removing the cover : Recorder ID. SW-version back end of player. SW-version CDR loader. SW-version CD loader (only for DR6050). CDR main board test [F FWD] key. The message "DERRn" will be displayed with n indicating the faulty test number. If one of the tests is aborted with the [F FWD] key, no error message will be displayed for this test. The flash data erase test ("DTST3") can not be aborted ! The CDR main board test consists out of : DRAM test Display : "DTST1". The DRAM used for buffer management is tested by writing, reading and verifying test patterns. Flash checksum test Display : "DTST2". This test checks the checksum of the player's SW stored in the flash. Flash data erase Display : "DTST3". During this test, all temporary information (CDtxt) in the flash is erased. CODEC (ADC/DAC) test Display : "DTST4". This test checks the CODEC IC by writing, reading and verifying test patterns. The test is not applicable for CDR950. CDR communication test Display : "DTST5". The communication between the host processor (DASP) and the CDR loader via the DSA-R-bus is tested. CD communication test Display : "DTST6"). The communication between the host processor (DASP) and the CD loader is tested. The test is only applicable for DR6050. Loader tests These tests determine if the CDR loader and the CD loader in case of a DR6050 w ork correctly. A CD-DA disc with a minimum of 3 tracks needs to be inserted in both loaders. A
6.4
Mechanical service diagnostics
MECHANICAL SERVICE DIAGNOSTICS
(test for defective components)
If power ON, switch power OFF
Press + simultaneously and switch ON unit
FOCUS TEST Display shows "BUSY" Visual inspection
TRAY TEST Visual inspection Display shows "OPENED" even if tray is blocked
SLEDGE TEST Visual inspection Display shows "BUSY"
To end test, switch OFF unit
CL96532086_026.eps 080999
Figure 6-3 6.4.1 Description No external tools are required to perform this test. The cover needs to be removed because the user has to check the movements of the tray, focus and sledge visually. Pressing keys [PLAY/PAUSE] and [STOP] simultaneously while switching on the unit, starts the test. Switching off the unit ends the test. In case of a DR6050, one can check the CD loader mechanics in the same way by pressing the above key combination on the CD player keys.
8
6.4.2
Requirements to perform the test Working keyboard to cycle through the tests and to start up the test. Working local display to check the output messages.
6.5.1
Description This test is initiated by pressing [ERASE] and [RECORD] simultaneously while switching on the unit. The player will erase a complete CD-RW disc (including PMA and ATIP lead out area) at speed N=2. The display shows the countdown of the remaining time required for the operation to complete. The format is "ER mm:ss", where "mm" are the remaining minutes and "ss" the remaining seconds. After completion the message "PASSED" is shown, and the player has to be switched off and on again to start up in normal operating mode. Switching off the unit before completion of the test, leaves the disc in an unpredictable state. In such case only a complete DC-erase procedure can recover the CD-RW disc.
6.4.3
Description of the tests
Focus control test The focussing lens is continuously moving up and down. The display reads "BUSY". Sledge control test After pressing [F FWD] the sledge continuously moves up and down. Pressing [REWIND] stops the sledge at the position it is in and the focus control test resumes. The display reads "BUSY". Tray control test This test starts from within the focus control test routine. Pressing [OPEN/CLOSE] moves the tray in or out. In the tray open position one can initiate focus and sledge tests by pressing [F FWD]. One has to stop these tests pressing [REWIND] before it is possible to close the tray again. Depending on the action the display reads "OPEN", "OPENED", "CLOSE" or "BUSY".
6.5.2
Requirements to perform the test Functional CDR player. A CD-RW audio disc must be present in the tray.
6.5
DC-erase service mode
DC ERASE SERVICE MODE
(erasement of complete CD-RW)
Load CD-RW disc Press + simultaneously and switch ON unit
Display shows: "ER mm:ss"
mm ss
:remaining minutes :remaining seconds
TOTAL and REM are also illuminated
Display shows: "PASSED" when the erase function is completed "ERROR" if DC ERASE fails
To end test, switch OFF unit
CL96532086_027.eps 080999
Figure 6-4
9
7.
7.1
Faultfinding trees
CDR-Module
NO DISC LOADED SWITCH ON POWER
CHECK: MAINS, MAINS CABLE POWER SUPPLY (SEE FAULT FINDING GUIDE PSU) WIRING ON/OFF SWITCH FUSES VOLTAGES DISPLAY (SEE FAULT FINDING GUIDE DISPLAY BOARD) WIRING SUPPLY VOLTAGES CLOCK SIGNAL 8MHz CONTROL SIGNALS KEYBOARD STANDBY LED ELECTRICAL SERVICE DIAGNOSTICS: DISPLAY TEST, KEYBOARD TEST
NO DISPLAY?
YES
CHECK: DISPLAY: NO
"INSERT DISC"
YES
WIRING POWER SUPPLY VOLTAGES ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
PRESS CHECK: DISPLAY BOARD (SEE FAULT FINDING GUIDE DISPLAY BOARD) WIRING SUPPLY VOLTAGES CLOCK SIGNAL 8MHz CONTROL SIGNALS KEYBOARD ELECTRICAL SERVICE DIAGNOSTICS: DISPLAY TEST, KEYBOARD TEST MECHANICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF ERROR OCCURS
NO TRAY?
YES
INSERT DISC PRESS
CD-DA DISC LOADED? YES
NO CD-R DISC LOADED? YES
NO CD-RW DISC LOADED? YES
SEE CD-DA DISC FAULT FINDING
SEE CD-R DISC FAULT FINDING
SEE CD-RW DISC FAULT FINDING
CL 96532076_016.eps 290799
Figure 7-1
10
CD-DA DISC LOADED
CHECK: WIRING POWER SUPPLY VOLTAGES ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
DISC DETECTION & READING?
NO
YES CHECK: DISC: DIRT, SCRATCHES, DAMAGED...
DISPLAY: "CD" & T.O.C. INFO?
NO
ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES CHECK: PRESS AUDIO CONNECTIONS & CABLES I/O BOARD W651 CONNECTION FLEX CONNECTION +5V (pin 8 conn. JJ01) KILL VOLTAGE (pin 7 conn. JJ01): -8V DURING PLAY KILL TRANSISTORS QN51 - QN54 PLAY AUDIO SIGNALS DISC TRACK 15: SIGNAL OF 5.4 VPP ON PINS 1 AND 3 OF CONN. J652 ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
ANALOG AUDIO OUT? YES
NO
CHECK: YES DISTORTION? AUDIO CONNECTIONS & CABLES I/O BOARD FLEX CONNECTION +5V (pin 8 conn. JJ01) ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
NO
CHECK: WIRING OF HEADPHONE/IR BOARD NO HEADPHONE? ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES CHECK: DIGITAL AUDIO OUT? YES NO AUDIO CONNECTIONS & CABLES I/O BOARD FLEX CONNECTION +5V (pin 8 conn. JJ01) DIGITAL OUT TRANSFORMER LT02, Q311 ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
PLAY BACK OF CD-DA DISCS OK
CL 96532076_017.eps 290799
Figure 7-2
11
CD-R DISC LOADED
CHECK:
DISC DETECTION & READING?
NO
YES
WIRING POWER SUPPLY VOLTAGES ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
CHECK:
DISPLAY: "CD R" & OPC INFO?
NO
DISPLAY: "CD" & T.O.C. INFO?
NO
DISC: DIRT, SCRATCHES, DAMAGED... ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES
YES
CD-R DISC PARTIALLY RECORDED OR EMPTY
FINALISED CD-R DISC LOADED SEE CD-DA DISC FAULT FINDING
START MANUAL RECORDING FROM ANALOG SOURCE
CHECK: LEVEL ADJUSTABLE? NO AUDIO CONNECTIONS & CABLES DISPLAY BOARD (SEE FAULT FINDING GUIDE DISPLAY BOARD) EASY JOG KNOB I2C COMMUNICATION ELECTRICAL SERVICE DIAGNOSTICS: KEYBOARD TEST ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES
START RECORDING FROM DIGITAL SOURCE
CHECK: DIGITAL IN? OPTICAL IN? NO AUDIO CONNECTIONS & CABLES I/O BOARD FLEX CONNECTION +5V (pin 8 conn. JJ01) Q311, OPTICAL RECEIVER J301 ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES
RECORDING SUCCESSFUL?
NO
CHECK: ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES
SET OK
CL 96532076_018.eps 290799
Figure 7-3
12
CD-RW DISC LOADED
CHECK:
DISC DETECTION & READING?
NO
YES
WIRING POWER SUPPLY VOLTAGES ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
CHECK:
DISPLAY: "CD RW" & OPC INFO?
NO
DISPLAY: "CD" & T.O.C. INFO?
NO
DISC: DIRT, SCRATCHES, DAMAGED... ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS
YES
YES
CD-RW DISC PARTIALLY RECORDED OR EMPTY
FINALISED CD-RW DISC LOADED SEE CD-DA DISC FAULT FINDING
START ERASING OF LAST RECORDED TRACK
ERASING SUCCESSFUL?
NO
CHECK: ELECTRICAL SERVICE DIAGNOSTICS: REPLACE CDR MODULE IF "DERRn" OR "BERRn" ERROR OCCURS IF DISC CORRUPTED TRY DC ERASE
CL 96532076_019.eps 290799
YES
SET OK
Figure 7-4
13
7.2
CD Module
CD MODULE
NO DISC POWER ON
CHECK FLEX CONNECTION FROM CDR MAIN BOARD POWER SUPPLY +5V, +12V AT TESTPOINTS 28 AND 27 +5V AT CONN. 1000 PINS 1 AND 3 +5V AT IC7005 PIN 14 +3V3 AT IC7000 PINS 5,17,21,57, CHECK SAFETY RESISTORS +5V AT IC7020 PIN 25 +10V AT IC7020 PINS 26, 27, 28 +12V AT IC7021 PIN 5, CHECK SAFETY RESISTOR R3131 +12V AT IC7022 PIN 5, CHECK SAFETY RESISTOR R3154 +5V AT IC7025 PIN 16 +5V AT IC7202 PIN 38, CHECK SAFETY RESISTOR R3308 +3V3 AT IC7309 PINS 4 AND 13, CHECK SAFETY RESISTORS R3215, R3216 +12V AT IC7120 PIN 8, CHECK SAFETY RESISTOR R3263 CLOCKS 8.4672MHz AT TESTPOINT 7 12MHz AT TESTPOINTS 29 AND 30 11.2896 AT TESTPOINT 10 2.1168MHz AT TESPOINT 20 44.1kHz AT TESTPOINT 21 DISPLAY SEE FAULTFINDING GUIDE DISPLAY BOARD MICROPROCESSOR 7202
DISC DETECTION STARTS? YES
NO
NO DISPLAY?
YES
PRESS
DIAGNOSTIC SOFTWARE : MECHANICAL SERVICE DIAGNOSTICS CD LOADER : TRAY TEST NO TRAY? CHECK TRAY MOTOR VOLTAGES TRAY+, TRAYMICROPROCESSOR 7202 CHECK TRAY MOTOR DRIVER IC7021 REPLACE OR REPAIR CD LOADER ASSY: TRAY MOTOR ASSY 02, BELT 11
YES
LOAD DISC (CD-DA OR PARTIALLY RECORDED CD-R/CD-RW) PRESS
DIAGNOSTIC SOFTWARE : MECHANICAL SERVICE DIAGNOSTICS CD LOADER : FOCUS TEST & SLEDGE TEST CHECK WIRING TO CDM CHECK POWER DRIVERS 7021, 7022, 7020 CHECK VOLTAGES ON POWER DRIVERS (SEE CIRCUIT DIAGRAMS) TESTPOINTS 4, 5, 6 : PULSE DENSITY MODULATED SIGNALS HF PATH
NO TOC?
YES
TESTPOINTS 1, 2, 3, 9 : EYEPATTERN CHECK RW AT TESTPOINT 8 : HIGH FOR CDDA AND CDR DISC, LOW FOR CDRW DISC. EYEPATTERN OF CDRW DISC WILL BE AMPLIFIED ( » X 2.5). EYEPATTERN OF CDDA DISC WILL BE ATTENUATED(» X 0.8) CHECK S1,S2 AT TESTPOINTS 25 AND 26 (SEE CIRCUIT DIAGRAMS) TESTPOINTS 20, 21, 22: I2S DATA, WCLK, SCLK REPLACE OR REPAIR CD LOADER ASSY (CDM MECHANISM)
SEE NEXT PAGE: PLAYBACK
CL 96532086_030.eps 080999
Figure 7-5
14
CD MODULE PLAYBACK
PRESS DAC 7309 TESTPOINTS 20, 21, 22 : I2S AT INPUT OF DAC 7309 CHECK POWER SUPPLY PINS 4, 13 CHECK CLK11 AT PIN 6 : 11.2896MHz PIN 11 : MUTE HIGH? TESTPOINTS 23, 24 : ANALOG OUTPUT? REPLACE DAC 7309 OPAMP 7120 TESTPOINTS 23, 24 : ANALOG OUTPUT? POWER SUPPLY: PIN 8 12V REPLACE OPAMP 7120
AUDIO?
NO
YES
YES DISTORTION?
DAC 7309 OPAMP 7120
NO
NO AUDIO CD OUT PCB? YES
FLEX TO CDR MAINBOARD FLEX TO CD OUT BOARD CHECK I/O BOARD, CD OUT BOARD
PLAYBACK CD MODULE OK
CL 96532086_031.eps 080999
Figure 7-6
15
8.
8.1
8.1.1
Faultfinding Guide
Display Board
Description of display board
General description The display board has three major parts : the FTD (Fluorescent Tube Display), the display controller TMP87CH74F and the keyboard. The display controller is controlled by the DASP master processor on the CDR main board. The communication protocol used is I2C. So all the information between DASP and display controller goes via the SDA or I2C DATA and SCL or I2C CLK lines. Communication is always initiated by the DASP on the CDR main board. Unlike the previous generations of CDR players, the interrupt generated by the display controller at key-press or reception of remote control is not used. Instead, the DASP polls the display controller for these events.
Display controller TMP87C874F TMP87CH74F ( QY01) is a high speed and high performance 8-bit single chip microprocessor, containing 8-bit A/D conversion inputs and a VFT (Vacuum Fluorescent Tube) driver. In this application, its functions are : slave microprocessor. FTD driver. generates the square wave for the filament voltage required for an AC FTD. generates the grid and segment scanning for the FTD. generates the scanning grid for the key matrix. input for remote control. All the communication runs via the serial bus interface I2C. The display controller uses an 8MHz resonator as clock driver.
BLOCK DIAGRAM
TMP87C874F 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
I/O PORT8 (VFT)
65 66 67
I/O PORT7 (VFT)
I/O PORT6 (VFT) VDD VAREF
40 39 38 37
I/O PORT9 (VFT)
68 69 70 71 72 73
DATA MEMORY ( RAM ) 512X8 BIT
I/O PORT5
PROGR MEMORY ( ROM ) 8kX8 BIT
VASS PROGRAM COUNTER
36 35 34 33 32
CPU
16 BIT TIMER/COUNTER INTERRUPT CONTROLLER 8 BIT TIMER/COUNTER
76 77 78 79
I/O PORT4
75
I/O PORTD (VFT)
74
31 30 29 28 27 26
8 BIT A/D CONVERT.
CLOCK/TIMING CONTROLLER ( I/O PORT2 )
VKK
I/O PORT0
VSS1
80
I/O PORT1
RESETN TEST1 XOUT
25
SCK0
I2 C PORT3
SCL SDA
INT0
1
2
3
4
5
6
7
8
9 1 6 5
10
11
1 9 12
13
14
INT1
P22
P21
P20
XIN
17
18
20
21
22
23
24
PIN DESCRIPTIONS
INT0 INT1 RESETN SCL SDA TEST VAREF VASS VDD VKK VSS XIN, XOUT external interrupt input 0 external interrupt input 1 reset signal input, active low I2C-bus serial clock input/output I2C-bus serial data input/output test pin, tied to low analog reference voltage input analog reference ground +5V VFT driver power supply ground resonator connecting pins for high-frequency clock
Figure 8-1
CL 96532076_028.eps 290799
16
8.1.2
Test instructions
Supply voltages The display board receives several voltages via connector JY01. · VFTD : -35V ±5% measured at pin 2 of conn. JY01. · VDC1-VDC2 : 3V8 ±10% measured between pin 1 and 3 of conn. 1119. · +5V +5V ±5% measured at pin 10 of conn. JY01 :
Voltages VFTD, VDC1 and VDC2 are produced in the power supply unit and sent to the display board via the CDR main board. The +5V voltage is produced on the CDR main board as D5V.
Grid lines Level and timing of all grid lines, G1-->G15, can be checked either at the FTD itself or at the display controller. Grid lines G13, G14 and G15 each have an extra current amplifier in line : QY02 for G13, QY03 for G14 and QY04 for G15. A typical grid line signal shows in the oscillogram below.
PM3392A
+4V 0V
Clock signal As clock driver for the display controller, a resonator of 8 MHz (XY01) is used. The signal can be measured at pins 8 and 9 of the display controller : 8 MHz ±5%. Control signals RESET The reset signal comes via pin 4 of conn. JY01 from the DASP master processor on the CDR main board (SYS_RESET). The reset is low active. It should be kept low during power up for at least 3 machine cycles with supply voltage in operating range and a stable clock signal (1 machine cycle = 12 x 1/Fc (8 MHz) sec.). During normal operation, the reset should be high (3V3). The high signal is 3V3 because the DASP operates on 3V3. I2C DATA/I2C CLK These lines connect to the DASP master processor via respectively pin 5 and pin 7 of conn. JY01. When there is no communication, they should have the high level (+5V). The oscillogram below gives an indication of how these signals should look like.
-38V
CH1! 10.0
V=
M TB1. 00ms
ch 1+
CL 96532076_024.eps 290799
Figure 8-3 `Gridline'
Segment lines Level and timing of all segment lines, P1-->P21, can be checked either at the FTD itself or at the display controller. The data on these segment lines however, depends on the characters displayed. The oscillogram below shows a segment line with data. A segment line without data maintains a -38V level.
PM 3392A
PM 3392A
+5V I2C DATA 0V +5V
+5V 0V
-35V
I2C CLK 0V
CH1! 2. 00 V = CH2 2 V=
CH1! 10 .0 V=
M TB1. 00ms
ch 1+
CL 96532076_027.eps 290799
M TB10.0m s
ch 1+
CL 96532076_025.eps 290799
Figure 8-4 `Segment line' Figure 8-2 `I2C signals'
FTD drive lines Filament voltage Should measure 3.8V ±10% (=VDC1-VDC2) between pins 1-3 and pins 1-52 of the FTD(VX01).
Key matrix lines The lines connected to pins 34, 35, 36 and 37 of the display controller act as matrix scanners. Without a key pressed, they maintain a low level. As soon as a key is pressed, the scanning line connected to that key puts out a scanning signal, which should look like the oscillogram below. This scanning signal goes via the pressed key to I/O port 4 of the display controller (pins 28 to 33). The display controller can now determine which key has been pressed. Without a key pressed, pins 28 to 33 of the display controller maintain a high level (+5V).
17
PM3392A
The pulses created this way arrive at pin 16 and 17 of the display controller. The first pulse to arrive tells the controller the direction of the rotation. Counting the pulses reveals the amount of rotation. Combining and decoding this information, the display controller will execute the appropriate task.
+5V
0V
Push button operation This button connects to the key matrix lines and thus the operation is identical to the ordinary keys. Without being pressed, pin 4 of the easy jog maintains the low level, pin 5 the high level. When pressed the scanning signal goes through the closed contact of pins 4 and 5, and can be checked at both pins. IR receiver - remote control In the CDR570/930 the IR receiver RPM6934-V4 (ZY01) is mounted on the display board. In all versions the IR receiver connects to the display controller. The signal coming from the receiver can be checked at pin 22 of the display controller. This signal is normally high (+5V). When the remote control is being operated, pulses mixed in with the +5V can be measured. The oscillogram gives an indication of how the signal looks like with the RC being operated.
CH1!2. 00 V=
MT
B5.00m s
ch1+
CL 96532076_026.eps 290799
Figure 8-5 `Key matrix scan line'
Easy jog knob Rotary operation The easy jog knob (SY26) incorporates a whole heap of user control possibilities in just one knob. Without the knob being operated, pin 1 and 3 of the knob (and thus pin 16 and 17 of the display controller), maintain the +5V level. Turning the knob clockwise briefly connects pin 1 to GND followed by pin 3.
PM3392
PM 339 2A
+5V
Pin1 Pin3
0V
1
CH 2.00 V= 1!
CH1 5.00 V= CH2 5.00 V= MTB20.0ms- 1.92dv c h2CL 96532076_023.eps 290799
MTB20. 0ms
ch 1+
CL 96532076_021.eps 290799
Figure 8-8 `IR receiver signal' Figure 8-6 `Turn clockwise' Turning the knob anti-clockwise briefly connects pin 3 to GND followed by pin 1.
PM3392
Pin1 Pin3
CH1 5.00 V= CH2 5.00 V=
MTB20.0ms- 1.92dv c h2CL 96532076_022.eps 290799
Figure 8-7 `Turn anti-clockwise'
18
8.1.3
Display board troubleshooting guide
SWITCH POWER ON, EXIT STAND BY MODE
CHECK : SUPPLY VOLTAGES -35V± 5% at conn. JY01-2 3V8 ± 10% bet ween conn. JY01-1 and JY01-3 +5V ± 5 % at conn. JY01-10 CLOCK SIGNAL 8Mhz at pins 8, 9 of QY01 CONTROL SIGNALS RESETN 3V3 (high) at conn. JY01-4 after start up I2C DATA at conn. JY01-5 I2C CLK at conn. JY01-7 FTD DRIVE LINES Filament voltage 3V8 10% between pins 1-3 and pins 1-52 of the FTD (VX01) Grid lines (see test instructions) Segment lines (see test instructions) ELECTRICAL SERVICE DIAGNOSTICS - Local display test
NO DISPLAY?
YES
KEY FUNCTIONS?
NO
CHECK: KEY MATRIX LINES (see test instructions) ELECTRICAL SERVICE DIAGNOSTICS Keyboard test EASY JOG KNOB (see test instructions)
YES
REMOTE CONTROL?
NO
CHECK: IR RECEIVER signal at pin 22 of QY01 ( see test instructions) ELECTRICAL SERVICE DIAGNOSTICS Remote control t st e
YES
DISPLAY BOARD OK
Figure 8-9 Display board troubleshooting'
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19
8.2
8.2.1
Power Supply Unit P816
Description of P816 MOSFET Q825 is used as a power switch controlled by the controller Q810. When the switch is closed, energy is transferred from mains to the transformer. This energy is supplied to the load when the switch is opened. Through control of the switch-on time, the energy transferred in each
cycle is regulated so that the output voltages are independent of load or input voltage variations. The controlling device MC44603 is an integrated pulse width modulator. A clock signal initiates power pulses at a fixed frequency. The termination of each output pulse occurs when a feedback signal of the inductor current reaches a threshold set by the error signal. In this way the error signal actually controls the peak inductor current on cycle-by-cycle basis.
SWITCHING POWER SUPPLY PCB. (P801)
1 D802 S1WB G815 0.01 F820 L820 S815 J820 J821 2A_125V(F&U ) 2A_250V(N&K) R819 C820 330k 0.22 ) 250V (UL/CSA,MITI 1M(CB) C819 0.1 250V C825 470pF /400V C826 470pF /400V D803 D804 C828 470pF /400V R823 18k 1W R832 18k 1W R829 10k D832 AG01 L832 10
C829 4.7/50V D829 24V C833 100/25V
L831 L831 D851 AG01 L853 4.7µH
Q851 LM317
L854 10µH R853 10 C892 100/25 C854 100/6.3V L852 C855 0.1 R894 1k Q892 PC123F
D806 Q825 2SK2943 C821 120 /400V D807 R825 1k R826 1
L825 C827 470pF /1kV
4 14 C851 0.1
J801
R852 220 C852 330 /16V L851 4.7µH L856 6.8µH R851 560
13 C859 C860 (OPTION) 0.1 -34V GND +5V +5V GND GND GND +12V -8V
J828
R827 1.5
R828 1.5
12 D856 C856 RK46 11 5 10 6 9 L861 1µH D861 AG01 C861 C862 10/50V Q861 2SC Q862 2SA +12V D866 RU4YX R864 10k R862 1k R863 10k D862 R865 10k L867 2.2µH R866 1k C869 220 /16V C864 220/50V C857 2200 /10V R861 10k L862 10µH
R811 22
D868
R801 82k C801 82pF NP0
Q810
R810 10k
L866 16 VREF IREF REFERENCE BLOCK SUUPLY INITIZLIZATION UVL01 BLOCK 1
C811 0.1
8
C866 0.1 D871 AG01
MC44603P DEMAGINETIZATION 8 DETECT DEMAGNETISATION MANAGEMENT 9 SYN C REF I OSCILLATOR 10 15 12 RF STANDB Y RP STANDB Y STANDBY (REDUCED FREQUENCY) VSB OUT
C867 1000 /16V
C868
Q871 7908
7 C871 0.1 R812 100 R813 15 C813 2200pF Q801 PC123F R887 100 D836 D835 D814 AG01 R886 D 881 T L431 C882 0.022 R883 1.8k C881 100 /25V L871 C872 220 /16V L872 10µH C873 220 /16V R881 R882 3.3k 100
C877 0.1
C875 100 /16V
C802 820pF R802 22k R803 4.7k C803 470p 14 R805 R804 15k 15k C804 4700pF 13
2 LATCH 3 =1 Q BUFFER 4 THERMAL SHUTDOWN IREF VREF VOC OVER OVER VOLTAGE 6 VOLTAGE MANAGEMENT PROTECT UVL01
L873 10
C876
2.5V ERROR AM P VOLTAG E FEEDBACK E/A OUT FOLDBACK FOLDBACK INPUT 5
R884 2.21k 1% R885 681 1%
J891
DMAX& SOFT-START CONTROL
R814 1.8k R815 1.8k
C898 0.1
VREF CURRENT SENSEINPUT 7 C809 1500p R809 330 SOFTSTART &DMAX 11 C810 2.2/50V
R816 180
C814 0.1 +12V R892 22k Q891 2SC2878 R891 22k C891 100/25 R893 10k
R806 1k
R808 R807 18k 180k
Figure 8-10 `Blockdiagram P816'
Description of controller MC44603 The MC44603 is an enhanced high performance controller that is specifically designed for off-line and DC-to-DC converter applications. This device has the unique ability of automatically changing operating modes if the converter output is overloaded, unloaded or shorted. The MC44603 has several distinguishing features when compared to conventional SMPS controllers. These features consist of a foldback facility for overload protection, a standby mode when the converter output is slightly loaded, a demagnetization detection for reduced switching stresses on transistor and diodes, and a high current totem pole output ideally suited for driving a power MOSFET. It can also be used for driving a bipolar transistor in low power converters. It is optimised to operate in discontinuous mode but can also operate in continuous mode. Its advanced design allows use in current mode or voltage mode control applications.
Pin connections
VCC VC Output Gnd Foldback Input Overvoltage Protection (OVP) Current Sense Input Demag. Detection
1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9
Rref R Frequency Standby Voltage feedback Input Error Amp Output R Power Standby Soft-Start/Dmax/ Voltage Mode CT Sync Input
CL 96532076_030.eps 290799
Figure 8-11
20
+4.1V
J851
Pin function description
Pin 1 2 3 4 5 6 7 8
Name VCC VC Output Gnd Foldback Input Overvoltage Protection Current Sense Input Demagnetisation Detection Synchronisation Input CT SoftStart/Dmax/Volta ge-Mode RP Standby
Description This pin is the positive supply of the IC. The operating voltage range after start-up is 9.0 to 14.5 V. The output high state (VOH) is set by the voltage applied to this pin. Peak currents up to 750 mA can be sourced or sunk, suitable for driving either MOSFET or bipolar transistors. The groundpin is a single return, typically connected back to the power source. The foldback function provides overload protection. When the overvoltage protection pin receives a voltage greater than 2.5V, the device is disabled and requires a complete restart sequence. A voltage proportional to the current flowing into the power switch is connected to this input. A voltage delivered by an auxiliary transformer winding provides to the demagnetisation pin an indication of the magnetisation state of the flyback transformer. A zero voltage detection corresponds to complete core saturation. The synchronisation input pin can be activated with either a negative pulse going from a level between 0.7V and 3.7V to Gnd or a positive pulse going from a level between 0.7V and 3.7V up to a level higher than 3.7V. The oscillator runs free when Pin 9 is connected to Gnd. The normal mode oscillator frequency is programmed by the capacitor CT choice together with the Rref resistance value. CT, connected between Pin 10 and Gnd, generates the oscillator sawtooth. A capacitor, resistor or a voltage source connected to this pin limits the switching duty-cycle. This pin can be used as a voltage mode control input. By connecting Pin 11 to Ground, the MC44603 can be shut down. A voltage level applied to the RP Standby pin determines the output power level at which the oscillator will turn into the reduced frequency mode of operation (i.e. standby mode). An internal hysteresis comparator allows to return in the normal mode at a higher output power level. The error amplifier output is made available for loop compensation. This is the inverting input of the Error Amplifier. It can be connected to the switching power supply output through an optical (or other) feedback loop. The reduced frequency or standby frequency programming is made by the RF Standby resistance choice. Rref sets the internal reference current. The internal reference current ranges from 100 A to 500 A. This requires that 5.0kW £ Rref £ 25kW .
CL 96532076_031.eps 290799
9
10 11
12
13 14 15 16
E/A Out Voltage Feedback RF Standby Rref
Figure 8-12
21
Block diagram of MC44603
16
Vref Iref
1
8
DEMAGNETISATION DETECT
DEMAGNETISATION MANAGEMENT
Iref VOSC PROT
REFERENCE BLOCK
Vref enable
SUPPLY INITIALISATION BLOCK
UVL01
9 10 15 12
SYNC INPUT CT
OSCILLATOR
VOSC
VC
2 3 4
1Set RF STANDBY Vstby
LATCH =1
1Reset
C
BUFFER
OUT
GND
RP STANDBY 2.5V
STANDBY
(REDUCED FREQUENCY)
THERMAL SHUTDOWN
Iref ERROR AMP VS8 OUT CURRENT SENSE
Vref
Voc
14
VOLTAGE FEEDBACK
13
E/A OUT
Dmax & SOFT-START CONTROL FOLDBACK
FOLDBACK INPUT CURRENT SENSE INPUT SOFT-START & DMAX
UVL01
Vref
OVER VOLTAGE MANAGEMENT
OVER VOLTAGE PROTECT
6
5
7
11
CL 96532076_032.eps 290799
Figure 8-13
Operating description of MC44603 The input voltage Vcc (pin 1) is monitored by a comparator with hysteresis, enabling the circuit at 14.5V and disabling the circuit below 7.5V. The error amplifier compares a voltage Vfb (pin 14) related to the output voltage of the power supply, with an internal 2.5V reference. The current sense comparator compares the output of the error amplifier with the switch current Isense (pin 7) of the power supply. The output of the current sense comparator resets a latch, which is set every cycle by the oscillator. The output stage is a totem pole, capable of driving a MOSFET directly. Start up sequence of P816 t1: Charging the capacitors at Vcc C829 will be charged via R823 and R832, C833 and C811 v i a R829. The output is switched off during t1. t2: Charging of output capacitors When the input voltage of the IC exceeds 14.5V, the circuit is enabled and starts to produce output pulses. The current consumption of the circuit increases to about 17mA, depending on the external loads of the IC. At first, the capacitors at the Vcc pin will discharge because the primary auxiliary voltage, coming from winding 7-9 is below the Vcc voltage. At some moment during t2, the primary auxiliary voltage reaches the same level as Vcc. This primary auxiliary voltage now determines the Vcc voltage. t3: Regulation The output voltage of the power supply is in regulation. t4: Overload When the output is shorted, the supply voltage of the circuit will decrease and after some time drop below the lower threshold voltage. At that moment, the output will be disabled and the process of charging the Vcc capacitors starts again. If the output is still shorted at the next t2 phase, the complete startand stop sequence will repeat. The power supply goes in a hiccup mode.
14.5V 10V 7.5V p.a.v. 0V Vcc
17mA Icc 1mA
OUTPUT
short Vo 0 t1 t2 t3 t4
CL 96532076_035.eps 290799
Figure 8-14 `Start-up sequence'
Regulation of P816 Figure 8-14 shows the most relevant signals during the regulation phase of the power supply. The oscillator voltage ramps up and down between V1 and V2. The voltage at the current sense terminal is compared every cycle with the output of the error amplifier Vcomp. The output
22
is switched off when the current sense level exceeds the level at the output of the error amplifier. TimeON phase : A drain current will flow from the positive supply at pin 2 of the transformer through the transformer's primary winding, the MOSFET and Rsense to ground. As the positive voltage at pin 2 of the transformer is constant, the current will increase linearly and create a ramp dependent on the mains voltage and the inductance of the primary winding. A certain amount of energy is stored in the transformer in the form of a magnetic field. The polarity of the voltages at the secondary windings is opposite to the primary winding so that the diodes are non-conducting in this phase. TimeDIODE phase : When the MOSFET is switched off, energy is no longer supplied to the transformer. The inductance of the tranformer now tries to maintain the current which has been flowing through it at a constant level. The polarity of the voltage from the transformer therefore reverses. This results in a current flow through the transformer's secondary winding via the now conducting diodes, electrolytic capacitors and the load. This current is also ramp shaped but decreasing. TimeDEAD phase : when the stored energy has been supplied to the load, the current in the secondary windings stops flowing. At this point, the drain voltage of the MOSFET will drop to the voltage of C821 with a ringing caused by the drain-source capacitance with the primary inductance. The oscillator will start a next cycle which consists of the above described three phases. The time of the different phases depends on the mains voltage and the load. TimeDEAD is maximum with an input of 400VDC and a minimum load. It will be zero with an input of 100VDC and an overload.
PM3394B ch1 ch3 ch2 T 1
CH1 2 CH2 CH3 2 V~ ALT MTB5.00us- 0.90dv ch1-
3
2
ch1 : Drain voltage ch2 : Drain current ch3 : Gate voltage
CH1 1 CH3 50mV~ ALT MTB5.00us- 0.90dv ch1-
PM3394B ch1 ch3 1
T
V2 Vosc V1 0 Vcomp Vsense
3
ch1 : Drain voltage ch2 : Oscillator voltage
PM3394B
CH1 1 CH3 20mV~ ALT MTB5.00us- 0.90dv ch1-
Vgate
ch1 1 ch3
Vdrain
T
Idrain
Idiodes
3
Ton
Tdiode Tdead
CL 96532076_034.eps 290799
ch1 : Drain voltage ch3 : Sense voltage
CL 96532076_033.eps 290799
Figure 8-15 `Regulation'
Figure 8-16 `Oscillograms'
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Circuit description of P816 Input circuit The input circuit consists of a lightning protection circuit and an EMI filter. The lightning protection comprises R819. The EMI filter is formed by C820, L820, C825 and C826. It prevents inflow of noise into the mains. Primary rectifier/smoothing The AC input is rectified by rectifier bridge D802 and smoothed into C821. The voltage over C821 is approximately 300V. It can vary from 100V to 390V. Start up circuit and Vcc supply This circuit is formed by R823, R834, C829, D828, R829, R811, C833 and C811. When the power plug is connected to the mains voltage, the stabilised voltage over D829 (24V ) will charge C833 via R829. When the voltage reaches 14.5V across C811, the control circuit of Q810 is turned on and the regulation starts. During regulation, Vcc of IC7110 will be supplied by the rectified voltage from winding 7-9 via L832, D832 and C833.
Demagnetisation The auxiliary winding (7-9) voltage is used to detect magnetic saturation of the transformer core and connected via R801 to pin 8 of Q810. During the demagnetisation phase, the output will be disabled. Overvoltage protection circuit This circuit consist of D814, C814, R814, R815 and R816. When the regulation circuit is interrupted due to an error in the control loop, the regulated output voltage will increase (overvoltage). This overvoltage is sensed at the auxiliary winding 7-9. When an overvoltage longer than 2.0 (s is detected, the output is disabled until VCC is removed and then re-applied. The power supply will come in a hiccup mode as long as the error in the control loop is present. Secondary rectifier/smoothing circuit There are 5 rectifier/smoothing circuits on the secondary side. Each voltage depends on the number of windings of the transformer. The -8V supply is regulated by voltage regulator Q871. On/off circuit
Control circuit The control circuit exists of Q810, C802, C804, C807, C809, C810, R802, R803, R804, R807, R808, R809 and R810. C802 and R810 define the frequency of the oscillator.
Power switch circuit This circuit comprises MOSFET Q825, Rsense R826, R827 and R828, R825, C827, L825, R812 and R813. R825 is a pull-down resistor to remove static charges from the gate of the MOSFET.
Regulation circuit The regulation circuit comprises opto-coupler Q801 which isolates the error signal from the control IC on the primary side and a reference component D881. The TL431(D881) can be represented by two components: a very stable and accurate reference diode a high gain amplifier
K R 2.5V A
CL 96532076_036.eps 290799
Figure 8-17 `TL 431' TL431 will conduct from cathode to anode when the reference is higher than the internal reference voltage of about 2.5V. If the reference voltage is lower, the cathode current is almost zero. The cathode current flows through the LED of the opto-coupler. The collector current of the opto-coupler flows through R806, producing an error voltage, connected to voltage feedback pin 14 of Q810.
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8.2.2
Troubleshooting P816
Check fuse F820 and replace if necessary OK Check DC voltages +5V, +12V, -8V, VFTD (-35V),VDC1-VDC2 (3V8) NOK Disconnect power supply unit from CDR main board Connect dummy load resistors 10W, 15 ohm at +5V, +12V and ground OK
Power supply unit OK
Check DC voltages +5V, +12V, -8V, VFTD, VDC1-VDC2 These voltages might be somewhat higher than specified
OK
Power supply is OK Check : - CDR main board - Display assy - CD main board for DR6050
Check the +5V and +12V NOK
OK
Check the path of the other faulty voltage(s)
OK
+5V : check D856, C857, L856, C859 +12V : check D866, C867, L867, R866, D868, C869
Connect the mains inlet to a mains isolated variac
Turn input voltage up and check voltage across C821, this voltage should be ±1.41 x Vin AC OK Is power supply ticking? NO
NOK
Check the functionality of the following components : F820, R819, C820, L820, D802, C821
Check : YES Load on secondary output Overvoltage protection : L832, D814, C814, R814, R815, R816 Oscillator voltage on pin 10 of Q810 : check C802, R810 replace Q810 Drive circuit : gate voltage of MOSFET Q825 components R812, R813, C813, R825 Regulation circuit - Measure voltage on pin 6 of Q810 with oscilloscope - If > 2.5V check the regulation circuit : Q810, D881 R881- R885, C881, C882, R804 - R806, R809, C804, C809
Check Vcc on pin 1 Q810 Vcc = 12V...... 16V OK Power supply OK
NOK
Check start circuit and Vcc supply: R823, R834, C829, D829, R829, R811, C811 Replace Q810
CL 96532076_037.eps 290799
Figure 8-18
8.3
CD Main Board
The CD main board is built around the compact disc mechanism VAM1250 and a loader 1250. The CDM delivers diode signals and an unequalised high frequency signal. These signals are necessary inputs for the decoder CD10. Based on these signals the decoder will control the disc. The decoder is able to control the sledge, focus motor, radial motor and turn table. When everything is "locked", the decoder delivers a digital output according to IEC958 standard, subcode to the microprocessor and I2S for reproducing analog audio signals by means of a D/A converter.
The microprocessor controls the CD10 and is slave of the master processor on the CDR main board in the DR6050. Both processors communicate via a DSA connection (data, strobe and acknowledge).
25
CDM V AM1250
Loader assy HF amp. Trig enta
Diode signals
PROCESSOR
Radial focus ,
DSA
CD10 SERVO DECODER
IIS, DOBM
Motor, sledge
Connect on pin 2 of position 1208 a clock signal of 8.4672 MHz ( 100ppm minimum rise time of 50ns and at TTL level (0V and +5V). Keep microprocessor 7202 in reset by forcing pin 7 at position 1208 to +5V. Release the reset. Now, the processor will reset the CD10 for at least 75 µs. The output clock CL11 should be available now at pin 42 of the CD10. Check the following frequencies :
UDA1320 DAC
ANA OUT
CL96532086_048.eps 080999
Figure 8-19 8.3.1 Supply Voltages
Description The CD main board receives +5V and +12V from the CDR main board via respectively pin 16 and pin 15 of connector 1208. The +5V is split up into +5VHF and +5V. The +5VHF is used mainly for the diode currents and the HF-amplifier. The +5V is used for the digital part of the board. On the board a +3V3 is made from the +5V for the decoder CD10 and an A3V3 for the DAC UDA1320. The +12V is split up into A12V for the audio output stage and +12V for the power drivers of the CDM. Measurements Connect following supplies to next pins :
+5V + 5% to pin 16 of connector 1208. +12V + 5% to pin 15 of connector 1208. Ground reference to pin 17 of connector 1208. Keep microprocessor 7202 in reset by forcing pin 7 of connector 1208 to +5V. Check the following voltages :
Point Position 7000 pin 16 Position 7202 pins 14,15 Position 7309 pin 6 Position 7309 pin 1 Position 7309 pin2
Frequency 8.4672 MHz ±100ppm 12MHz ±5% 11.2896 MHz ±100ppm 2.1168 MHz ±100ppm 44.1kHz ±100ppm
CL96532086_050.eps 080999
Figure 8-21 8.3.3 CD10 Decoder/Servo SAA7324 (7000)
Description The CD10 is a single chip combining the functions of a CD decoder, digital servo and bitstream DAC. The decoder/servo part is based on the CD7. The decoding part supports a full audio specification and can operate at single speed (n=1) and double speed (n=2). Block Diagram
VSSA2 D1 D2 D3 D4
8 9 10 11
VDDA2
VSSD2 VSSD3
50 58
VSSA1
4
VDDA1
14 5
VSSD1
17 33
VDDD1(P) VDDD2(C)
52 57
R1 R2
12 13
ADC
PREPROCESSING
CONTROL FUNCTION
54
RA FO SL
Point Position 1000 pins 1,3 Position 7000 pins 5,17,21,57 Position 7005 pin 14 Position 7020 pins 25 Position 7020 pins 26,27,28 Position 7021 pin 5 Position 7022 pin 5 Position 7025 pin 16 Position 7202 pin 38 Position 7309 pins 4,13 Position 7120 pin 8
Voltage +5V ± 5% +3.3V ± 5% +5V ± 5% +5V ± 5% +10 ±10% +12V ±10 +12V ±10 +5V ± 5% +5V ± 5% ( other appl. 3V3 possible) +3V3 ± 5% +12V ± 10
CL96532086_049.eps 080999
OUTPUT STAGES VRIN
7
55 56
Vref GENERATOR CONTROL PART
SCL SDA RAB SILD HFIN HFREF ISLICE Iref TEST1 TEST2 TEST3
40 39 41 42 2 1 3 6 25 31 44 EFM DEMODULATOR
64
LDON
MICROCONTROLLER INTERFACE MOTOR CONTROL DIGITAL PLL FRONT END ERROR CORRECTOR FLAGS
59 60
MOTO1 MOTO2
53
CFLG
AUDIO PROCESSOR
TEST
51 EBU INTERFACE
DOBM
SRAM
30
EF SCLK WCLK DATA
Figure 8-20 8.3.2 Clock Signals
SELPLL CRIN CROUT CL16 CL11/4
24 16 15 26 49
TIMING RAM ADDRESSER
SERIAL DATA 28 INTERFACE
27
29
37
Description The microprocessor has its own Xtal or resonator of 12MHz. The CD10 needs a clock of 8.4672MHz + 100ppm. This speed also relates to the disc speed. To avoid locking problems between the two drives in the CDR775, both drives run on the same clock. Therefore the CD main board gets the clock for the decoder from the CDR main board via pin 2 of connector 1208. The DAC needs a system clock to drive its internal digital filters and to clock the I2S signals from the decoder. In our case this is 11.2896MHz (CL11) generated by the CD10. Measurements Connect the power supply as described above in "1.1.1. Supply Voltages".
SBSY SFSY SUB RCK
48 47 46 45
SERIAL 35 DATA (LOOPBACK) 36 INTERFACE SUBCODE PROCESSOR PEAK DETECT
SCLI WCLI SDI
20 21
Vneg Vpos LN LP RN RP
BITSTREAM 18 DAC STATUS
43
DECODER MICROCONTROLLER INTERFACE
19
VERSATILE PIN