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Matsushita Electric SL-CT720GC Service Manual

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AD0504045AE
Portable CD Player
SL-CT720GC
Colours
(A)...........Blue Type
(S)...........Silver Type
Please use this manual together with the service manual for Model
No. SL-CT720GD/SG, Order No. AD0409064C0.
2005 Matsushita Electric Industrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
1
PDF created with pdfFactory Pro trial version
www.pdffactory.com

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Summary of Contents for Matsushita Electric SL-CT720GC

  • Page 1 Please use this manual together with the service manual for Model No. SL-CT720GD/SG, Order No. AD0409064C0. 2005 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. PDF created with pdfFactory Pro trial version...

  • Page 2: Replacement Parts List

    1. Note - This simplified service manual is provided to indicate the differences between the original model No. SL-CT720SG-S and the subsequent model No. SL-CT720GC-A/S. 2. Replacement Parts List Note: - Important safety notice: Components identified by mark have special characteristics important for safety.
  • Page 3 Ref.No. Change of Parts No. Part Name & Description Remarks SL-CT720SG-S SL-CT720GC-A/S CABINET PARTS RYK1400-S BOTTOM CABINET RYK1400-A RYF0729-S CD LID UNIT RYF0729-A RYK1399-S MIDDLE CABINET RYK1399-1S RKK0155A-2H BATTERY LID RKK0155A-1H RGU2334-S BUTTON,OPEN RGU2334-2S Accessory Parts RFKFHFAZ09EM RFKFHFAZ01E1 RECHARGEABLE BATTERIES...
  • Page 4 AD0409064C0 Portable CD Player SL-CT720GD / SL-CT720SG Colours (A)...Blue Type (D)...Orange Type [SL-CT720SG only] (P)...Pink Type [SL-CT720SG only] (S)...Silver Type PDF created with pdfFactory Pro trial version www.pdffactory.com...

  • Page 5: Specifications

    SPECIFICATIONS 2004 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 6 1. Accessories - AC adaptor for SL-CT720GD (RFEA438Q-S)..........1 pc. - AC adaptor for SL-CT720SG (RFEA444Z-S)..........1 pc. - Stereo earphones (L0BAB0000190)...........1 pc. - Wired remote control (N2QCBD000046).........1 pc. - External battery case (RFA2666-H)..........1 pc. - Soft case (RFC0071A-C)..........1 pc. - Rechargeable batteries (with case) (RFKFHFAZ09EM).........2 pcs.

  • Page 7: Handling Precautions For Traverse Deck

    This product utilizes a laser diode with the unit turned on, invisible laser radiation is emitted from the pick-up lens. Wavelength: 780 nm Maximum output radiation power from pick-up: 100 W/VDE Laser radiation from the pick-up lens is safety level, but be sure the followings: 1.
  • Page 8 4.2. Caution when replacing traverse deck The new traverse deck short-circuits by the short pin, the foil (B) and short lands to protect the laser diode against electrostatic breakdown. Be sure to replace to new one following procedures. 1. Remove the short pin from the FFC, and then connect it to the connector.

  • Page 9: Operation Checks And Component Replacement / Procedures

    Caution: The static electricity of your clothes will not be grounded through the wrist strap. So take care not to let your clothes touch the traverse deck (optical pick-up). 5. Operation Checks and Component Replacement / Procedures - This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components.
  • Page 10 - Check the P.C.B. (A side) as shown below. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 11 5.1.2. Checking for the P.C.B. (B side) - Follow the (Step 1) - (Step 5) of item 5.1.1. - Check the P.C.B. (B side) as shown below. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 12 5.2. Replacement for the CD lid unit, shaft plate, spring A and spring PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 13 PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 14 5.3. Replacement for the traverse motor and optical pick-up - Follow the (Step 1) - (Step 4) of item 5.1.1. PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 15 PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 16 5.4. Replacement for the rest switch - Follow the (Step 1) - (Step 4) of item 5.1.1. PDF created with pdfFactory Pro trial version www.pdffactory.com...

  • Page 17: Display Of Self-Diagnostic Function

    - Follow the (Step 1) , (Step 2) of item 5.3. 5.5. Replacement for the spindle motor - Follow the (Step 1) - (Step 4) of item 5.1.1. - Follow the (Step 1) , (Step 2) of item 5.3. 6. Display of Self-Diagnostic Function This unit (SL-CT720) has self-diagnostic function.

  • Page 18: Checking The Operation Problems On The Traverse Deck (Optical Pick-Up)

    Remote control display (Press PLAY and STOP button. After 15 seconds, it is displayed for 2 seconds.) In case of this display, it may be causing for abnormally movements of traverse deck, touching failure of REST detect switch and coming off or cutting off the flexible P.C.B.. It is necessary for confirmation or repair and replacement each parts.
  • Page 19 incorrect. The followings are the contents of the automatic adjustment result displays (Self-Check Function). 8.1. How to display automatic adjustment results 1. Load the test disc (SZZP1054C). 2. Press the (SKIP/SEARCH) and (SKIP/SEARCH) buttons simultaneously and hold them, and additionallypress the (PLAY/PAUSE) button.
  • Page 20 1. the waveform or voltage of the focus servo circuit is correct, 2. the focus coil of the optical pick-up is correct (around 8 ohms), 3. the optical pick-up returns to the normal state by exchanging the traverse deck. Follow the below steps when EF is displayed. (Cause: All adjustments (TGC, FGC, TBC, FBC) are set beyond the limit.) - Check if 1.
  • Page 21 S303: Volume control switch (VOL+) S304: R.skip/search ( ) switch S305: F.skip/search ( ) switch S308: Stop/turn off ( ) switch S310: Hold (HOLD) switch in OFF position - Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc.
  • Page 22 Measurement conditions: - AC adaptor is used for power supply. - Set the hold switch to ON. - The parenthesized is the voltage for test disc (1 kHz, L+R, 0 dB) in play mode, and the other, for no disc in stop mode. Caution! IC and LSI are sensitive to static electricity.
  • Page 23 Function Terminal Name 15 HPCNT Headphone L ch output control signal output 16 MUTEH Headphone mute ON output Beep signal output Connected to power supply Connected to power supply Connected to GND 21 BLKCK Block clock signal input Connected to GND Not used, open Not used, open Not used, open...
  • Page 24 Function Terminal Name 52 FSSEL Not used, open 53 NRFDET Not used, connected to GND via resistor / SEL 54 ZANSEL Not used, open REST Rest detect switch signal input PLAY Play key signal input 57 A.SHOCK Not used, open HOLD HOLD switch signal input 59 ZAN/ /...
  • Page 25 Function Terminal Name Address 7 signal output Address 6 signal output Address 5 signal output Address 4 signal output LDQM Lower bite data mask signal output Write enable signal output NCAS CAS control signal output NRAS RAS control signal output Clock enable signal output Address 3 signal output Address 2 signal output...
  • Page 26 Function Terminal Name Focus error signal amp inverting input Tracking error signal amp inverting input 43 TEOUT Tracking error signal amp output VREF VREF output 45 DUTYADJ Laser intermittent drive clock duty adj. / resistor terminal 46 CKMON Not used, open APC amp input Not used, open 49 VDDDRV...
  • Page 27 Function Terminal Name 76 HPCNT Headphone control signal input 77 HPVDDL Power supply terminal 78 HPOUTL L ch audio output for headphone 79 HPVSSL 80 HPVDDR Power supply terminal 81 HPOUTR R ch audio output for headphone 82 HPVSSR 83 NTEST Test mode input 84 DVSS2 Crystal oscillator connected...
  • Page 28 Function Terminal Name I/O Data signal input/output 5 I/O Data signal input/output 6 I/O Data signal input/output 7 I/O Data signal input/output 15 I/O Data signal input/output 14 117 DRVDD2 Power supply terminal I/O Data signal input/output 13 I/O Data signal input/output 12 I/O Data signal input/output 11 I/O Data signal input/output 10 I/O Data signal input/output 9...
  • Page 29 16. Caution in use of Rechargeable Battery - Take Rechargeable Battery out of Carrying Case and use it. - Be sure to carry Rechargeable Battery in this Carrying Case. / If not, may either heat or ignite by shorting with a metal. 17.
  • Page 30 item. After the discontinuation of this assembly in production, it will no longer be available. - All parts are supplied by SPC. Ref. No. Part No. Part Name & Description Remarks RAE0225Z-M TRAVERSE DECK UNIT RMG0503-K1 FLOATING RUBBER RXQ0798-1 TRAVERSE MOTOR RAF0223A-2 OPTICAL PICK-UP RDG0554...
  • Page 31 Ref. No. Part No. Part Name & Description Remarks RGU2334-2S BUTTON,OPEN (GDA/SGA/ / SGD/SGP) RQLS0244 LASER LABEL (SGS/SGA/ / SGD/SGP) RHQ0088-S SCREW RFKFHFAZ09EM RECHARGEABLE / BATTERIES L0BAB0000190 STEREO EARPHONES N2QCBD000046 WIRED REMOTE / CONTROL RFA2666-H EXTERNAL / BATTERY CASE RFC0062-X BATTERY CARRYING / CASE RFC0071A-C SOFT CASE...
  • Page 32 Ref. No. Part No. Part Name & Description Remarks C437 ECJ1VF1A105Z 10V 1U F1H1A1050002 C501,02 ECJ0EC1H150J 50V 15P F1G1H150A469 C504 ECJ1VF1C104Z 16V 0.1U C505 ECJ1VB1E223K 25V 0.022U F1H1E223A050 C506 ECJ1VF1A105Z 10V 1U F1H1A1050002 C507 F3G0G107A002 4V 100U C510 ECJ1VF1A105Z 10V 1U F1H1A1050002 C513 ECJ1XC1H101K...
  • Page 33 Ref. No. Part No. Part Name & Description Remarks ERY32SB075VA IC PROTECTOR C0DBAFG00014 IC12 C0CBAFD00003 IC61 C0DBAFE00017 IC71 C0CBCBZ00001 IC201 C1BB00000695 IC301 C2BBGF000637 IC302 C3EBCG000096 IC401 C0GBF0000017 IC501 MN6627962JB IC502 C3ABPG000145 ICP11 K5H1522A0018 IC PROTECTOR JK11 K2FB3B000003 JK,DC IN JK12 K2FB2B000003 JK,EXT BATT.
  • Page 34 Ref. No. Part No. Part Name & Description Remarks Q501 B1CHMC000001 TRANSISTOR Q502 B1CFHA000001 TRANSISTOR Q504 UNR511100L TRANSISTOR Q505 UN5214TX TRANSISTOR UNR521400L Q551 DTA143EUA106 TRANSISTOR B1GDCFGG0005 Q601 B1GFGCAA0001 TRANSISTOR Q602 UNR511400L TRANSISTOR Q704 B1GFGCAA0001 TRANSISTOR Q705 UN5115TX TRANSISTOR UNR511500L Q901 UNR511400L TRANSISTOR Q902...
  • Page 35 Ref. No. Part No. Part Name & Description Remarks R316 ERJ2GEJ102X 1/16W 1K ERJ2RMJ102X R317,18 ERJ3GEYJ102V 1/10W 1K R320 ERJ3GEYJ102V 1/10W 1K R321 ERJ2GEJ104 1/16W 100K R324 ERJ2RHD273X 1/16W 27K R325 ERJ3GEYJ333 1/10W 33K R326 ERJ2GEJ102X 1/16W 1K ERJ2RMJ102X R329 ERJ2GEJ104 1/16W 100K R331...

  • Page 36: Cabinet Parts Location

    Ref. No. Part No. Part Name & Description Remarks X501 H0J169300002 OSCILLATOR 18. Cabinet Parts Location 19. Traverse Unit Parts Location PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 37 20. Packaging PDF created with pdfFactory Pro trial version www.pdffactory.com...

  • Page 38: Schematic Diagram For Printing With Letter Size

    21. Schematic Diagram for printing with letter size F0409KH PDF created with pdfFactory Pro trial version www.pdffactory.com...
  • Page 39 Note: This printed circuit board diagram may be modified at any time with the development of new technology. (SIDE: A) (SIDE: B) 2 RECHARGEABLE BATTERIES 2.4V D361 Q305 C412 C437 Q301 C402 C401 IC401 R401 IC61 CN11 1012 C19 C3 C403 Q501 IC71...
  • Page 40 TRAVERSE SPINDLE S202 MOTOR MOTOR : POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE (REST DET.SWITCH) CN401 2.5V R331 R301 R308 R312 R314 (0V) Q307 3.9K 4.7K 8.2K 2.4V DTA143EUA106 POWER SUPPLY (REMOTE) (2.4V) IC302 C3EBCG000096 EE PROM 2.5V S T U W X Y 2.4V (1.9V)
  • Page 41 : POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE G H I J K L E D R509 J K L M N O P H G F E (1.4V) 1.9V ADPV 1.2V VREF TEIN C518 ATOFS 330P (1.1V) 0.8V 0V (0.1V) FEIN SDRCK 3.1V...
  • Page 42 : POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE JK11 DC IN 4.5V 330K 100P 4.2V 2SB1182TLPQR 3.6V REGULATOR 150K JK12 EXT BATT 3.9V (2.8V) ICP11 K5H1522A0018 CN11 2 RECHARGEABLE (1.8V) (1.2V) 4.2V 3.6V 2.5V 1.4V 1.2V 0.5V 2.8V 2.3V BATTERIES 2.4V 100K Q501...
  • Page 43 TRAVERSE SPINDLE S202 MOTOR MOTOR : POSITIVE VOLTAGE LINE (REST DET.SWITCH) CN401 48 47 46 45 44 43 42 41 40 39 38 37 PGND3 (2.4V) 0.1V OUT3R IC201 (2.8V) 3.9V 2.5V MUTE R205 C1BB00000695 3.9V ( 2.8V ) C401 (0.3V)1.2V 6.8K LASER POWER...
  • Page 44 OSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE 2.5V R331 R301 R308 R312 R314 (0V) Q307 3.9K 4.7K 8.2K 2.4V DTA143EUA106 POWER SUPPLY (REMOTE) (2.4V) IC302 C3EBCG000096 EE PROM 2.5V S T U W X Y 2.4V (1.9V) 2.4V (1.9V) 2.4V R397 100K R324...
  • Page 45 : POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE G H I J K L E D R509 (1.4V) 1.9V ADPV 1.2V VREF TEIN C518 ATOFS 330P (1.1V) 0.8V FEIN SDRCK AFOFS UDQM C520 (2V) 0V 0.022 (1.1V) 1.9V RFENV R504 (1.1V) 0.8V FEOUT (1.2V) 0.8V...
  • Page 46 J K L M N O P H G F E 0V (0.1V) SDRCK 3.1V UDQM 0V (1.5V) 0V (1.5V) 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 0V (1.5V) 0V (1.5V) 0V (1.5V)
  • Page 47 : POSITIVE VOLTAGE LINE : PLAYBACK SIGNAL LINE 330K 4.2V 2SB1182TLPQR 3.6V 150K REGULATOR 3.9V (2.8V) (1.8V) (1.2V) 4.2V 3.6V 2.5V 1.4V 1.2V 0.5V 2.8V 2.3V Q501 B1CHMC000001 POWER SUPPLY CONT. C0DBAFG00014 DC-DC CONVERTER 2.5V 2.5V 2.4V 2.5V 2.5V 2.5V 2.5V 3.9V 1.1V...
  • Page 48 JK11 DC IN 4.5V 100P JK12 EXT BATT ICP11 K5H1522A0018 CN11 2 RECHARGEABLE BATTERIES 2.4V 100K (2.8V) 3.9V IC12 C0CBAFD00003 BATTERY LOSS 2.5V Q302 CANCEL (2.4V) UN5114TX SWITCHING(CHARGE) 3.9V 8.6V 2.4V (2.8V) (7.7V) (0V) (2.8V) (6.8V) MA729TX 3.9V 100K 8.2V (1.9V) (0V) (0V)
  • Page 49 C0CBAFD00003 XP161A1355PR MN6627962JB 128PIN C1BB00000695 16PIN C0DBAFE00017 C0GBF0000017 48PIN C0DBAFG00014 24PIN C0CBCBZ00001 C2BBGF000637 80PIN C3EBCG000096 8PIN C3ABPG000145 54PIN No.1 No.1 2SK1958T1 UMG6NTR B1GFGCAA0001 2SB1182TLPQR 2SD1819ATX B1CHMC000001 DTA143EUA106 B1CHGD000004 UN5214TX UN5115TX UN5111TX UN5114TX B1ABMD000004 MA729TX B3AAB0000037 MA111TX B0JCDD000002 MA8056MTX Cathode Cathode Cathode Cathode Cathode...
  • Page 50 Optical digital/line out jack Rechargeable Headphone jack ( ) Lens battery Battery case terminal compartment DC IN jack Charge lamp Play/Stop/Turn off Display Open switch Hold switch Volume control Tone selection Play/Pause Play mode selection Stop/Turn off Memory/Recall/Display Skip/Search Earphones...
  • Page 51 OPTICAL PICK-UP MN6627962JB IC501 SERVO AMP / SERVO PROCESSOR / DIGITAL SIGNAL PROCESSOR DIGITAL FILTER & D/A CONVERTER X501 (16.9MHz) C1BB00000695 IC201 PULSE CONTROL 88 105 LASER POWER LOGIC DRIVE DUTY FEEDBACK RATE V-I AMP ADJUSTOR SEMICONDUCTOR LASER LASER DIODE MICRO NTEST DRIVER...
  • Page 52 ICP11 2 RECHARGEABLE REGULATOR BATTERIES 2.4V Q42,81,302 L703 HPOUTL BATTERY SWITCHING LOSS CANCEL (CHARGE) R ch L702 HEADPHONE Q704 INVERSE BAND RESET 2.8V/3.9V CURRENT Q903 CIRCUIT REGU- PROTECT/AC CIRCUIT MUTING LATOR BUZZER ADAPTOR C0CBAFD00003 DRIVE DET. C0DBAFG00014 2.5V POWER IC12 BOOSTER SAVE BATT...

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