SA-HT720GCP 1 Use of Active Subwoofer 1.1. Checking Player when Active Subwoofer is not used 1. This unit uses the active subwoofer to supply the power of the component, and the active subwoofer should be connected to the component to check operational conditions of the component.
SA-HT720GCP 2 Safety Precautions 2.1. GENERAL GUIDELINES 1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
SA-HT720GCP Caution Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD)sufficient to damage an ES device).
SA-HT720GCP 6 Precaution of Laser Diode CAUTION : This product utilizes a laser. Invisible laser radiation is emitted from the optical pick up lens when the unit is turned on. Wavelength : 662nm(DVD)/785nm(CD) Maximum output radiation power from pick up : 100µW/VDE Laser radiation from pick up unit is safety level, but be sure the followings: 1.
SA-HT720GCP 9 Accessories 5 Speaker cables (×5) (4m×3, 10m×2) Remote control AC power supply cord AM loop antenna AC Plug adaptor FM indoor antenna System cable Video Cable...
SA-HT720GCP 10 Handling Precautions for Optical Pickup Unit The laser diode in the optical pickup unit may brake down due to static electricity of clothes or human body. Use due caution to electrostatic breakdown when servicing and handling the laser diode.
Page 12
SA-HT720GCP 10.3.2. Human body grounding 1. Use the anti-static wrist strap to discharge the static electricity form your body.
SA-HT720GCP 11 Disassembly and Main Component Replacement Procedures “ATTENTION SERVICER” Some chassis components may have sharp edges. Be careful when disassembling and servicing. 1. This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components.
SA-HT720GCP 11.1. Disassembling the Top Cabinet Step 1 Remove 7 screws. Step 2 Remove the top cabinet in the direction of arrow. 11.2. Disassembling the Front Panel · Follow the (Step 1) - (Step 2) of Item 11.1. Step 1 Pull the front panel ass’y in both direction of arrow to 11.3.
Page 15
SA-HT720GCP · Checking of Loading Motor P.C.B. and DVD Module P.C.B. Step 3 Pull out FFC CN6002. Step 5 Upset base assembly in vertical position. Step 4 Remove 4 screws. · Checking of Main P.C.B., Tray Motor and Sensor P.C.B.
SA-HT720GCP 11.4. Removal of the Tray Base Guide (L) and Tray Base Guide · Follow the (Step 1) - (Step 2) of Item 11.1. · Follow the (Step 1) - (Step 4) of Item 11.2. · Follow the (Step 1) - (Step 5) of Item 11.3.
SA-HT720GCP Step 3 Rotate close lock gear to direction of arrow, press claw (b) and pull out close lock gear. 11.8. Removal of the Tray Motor Step 2 Flip the base mecha unit in vertical position. P.C.B. and Sensor P.C.B.
SA-HT720GCP push drive gear shaft up. Step 2 Remove Drive Gear (A) and Drive Gear (B). Step 3 Release the 2 claws in the direction of arrow (1), and then push the pulley pin in the direction of arrow (2).
SA-HT720GCP 11.14. Removal of the Cam Gear & Support Piece · Follow the (Step 1) - (Step 5) of Item 11.3. Step 1 Rotate (A) in cam gear anti-clockwise. Step 2 Remove slide plate (L) & (R) and change lever as arrow shown.
SA-HT720GCP 11.16. Assembly of Tray Base Step 1 Rotate cam gear anti-clockwise. Align at position (C) as marking on gear with arrow. Step 2 Make sure drive gear (A) at vertical position. Step 3 Push tray base to the direction of arrow shown.
SA-HT720GCP 12 DVD-Optical Pick-up Self-Diagnosis and Replacement Procedure 12.1. Optical Pickup Breakdown Diagnosis The optical pickup self-diagnosis function and tilt adjustment check function have been included in this unit. When repairing, use the following procedure for effective Self-diagnosis and tilt adjustment.Be sure to use the self-diagnosis functionbefore replacing the optical pickup when "NO DISC"...
SA-HT720GCP 12.2. Service Mode Table 1 The service modes can be activated by pressing various button combination on the player and remote control unit. Player buttons Remote control unit buttons Application Note STOP Error code display (Refer to the item, “12.3.
SA-HT720GCP Error Code Error Content Additional error explanation F890 Sending message when message is Sending message to AV task being sent to AV task F891 Message couldn’t be sent to AV task Begin sending message to AV task F893 FROM falsification...
SA-HT720GCP 12.6. Sales demonstration lock function This function prevents discs from being lost when the unit is used for sales demonstrations by disabling the disc eject function. "LOCKED" is displayed on the unit, and ordinary operation is disabled. 12.6.1. Setting ·...
SA-HT720GCP 13.2. Memorized Error Codes 13 Self-Diagnosis Function 13.2.1. Activating Self-Diagnosis Function 13.1. Automatic Displayed Error and Displaying Method Codes 1. Turn on the power. 13.1.1. Automatic Display Function 2. Select DVD/CD function. With no DVD/CD inserted in the player, press and hold down the button simultaneously For a power unit error, the code is automatically displayed.
SA-HT720GCP 14 Service Precautions 14.1. Recovery after the DVD player is repaired · When FROM or module P.C.B. is replaced, carry out the recovery processing to optimize the drive. Playback the recovery disk to process the recovery automatically. · Recovery disc (Product number: RFKZD03R005) ·...
SA-HT720GCP 15 Adjustment Procedure 15.1. Service Tools and Equipment Application Name Number Tilt adjustment DVD test disc DVDT-S15 or DVDT-S01 TORX screw driver (T6) Available on sales route. (T6) or RFKZ0185 Others Grease RFKXPG641 Confirmation CD test disc PVCD-K06 or any other commercially...
SA-HT720GCP 15.4. Optical adjustment 15.4.1. Optical pickup tilt adjustment Measurement point Adjustment point Mode Disc Tangential adjustment screw T01 (inner periphery) play DVDT-S15 or DVDT-S01 Tilt adjustment screw T30 (center periphery) T43 (outer periphery) play Measuring equipment Adjustment value None (Main unit display for servicing is used.) Adjust to the minimum jitter value.
SA-HT720GCP 17 Voltage Chart 17.1. DVD Module P.C.B. IC8001 Ref No. MODE CD PLAY STANDBY IC8001 Ref No. MODE CD PLAY STANDBY Ref No. IC8001 MODE CD PLAY STANDBY IC8001 Ref No. MODE CD PLAY STANDBY IC8001 Ref No. MODE...
Page 34
SA-HT720GCP IC8451 Ref No. MODE CD PLAY STANDBY Ref No. IC8451 MODE CD PLAY STANDBY Ref No. IC8601 MODE CD PLAY STANDBY Ref No. IC8605 MODE CD PLAY STANDBY IC8611 Ref No. MODE CD PLAY STANDBY Ref No. IC8651 MODE...
SA-HT720GCP 17.2. Main P.C.B. IC2000 Ref No. MODE CD PLAY STANDBY IC2001 Ref No. MODE CD PLAY 13.4 STANDBY 13.5 IC2002 Ref No. MODE CD PLAY 13.5 STANDBY 13.7 IC2004 Ref No. MODE CD PLAY STANDBY IC2005 Ref No. MODE...
SA-HT720GCP 18 Schematic Diagram Notes · This schematic diagram may be modified at any time Caution! with the development of new technology. IC and LSI are sensitive to static electricity. Notes: Secondary trouble can be prevented by taking care during...
DRV8 MUTE SHIFT IC8271 C0GBF0000004 SPINDLE MOTOR UNIT SPINDLE MOTOR DRIVE DRIVER GAIN CONTROL HALL AMP CURRENT SENSE AMP MUTE3 IC8611 DRV4 C3EBGZ000001 HALL1 EE PROM SP DRV DRV1 VHALF HALL2 (Not supplied) HALL3 TRAVERSE SW DRV6 SA-HT720GCP BLOCK DIAGRAM...
Page 40
AND GATE DVD CLK OP CPU CLK NEXOE NEXWE NEXCE OP CPU CMD DVD CMD MDQ16 IC8695 C0JBCA000066 AND GATE DVD STAT OP CPU STAT DATA IC8111 C0CBCBD00018 POWER SUPPLY (D3.3V) V OUT V IN (D5V) MDQ31 CONT SA-HT720GCP BLOCK DIAGRAM...
Page 41
SHIFT REGISTER LATCH POWER ON RESET DVD CLK DVD CLK DVD CMD DVD CMD DVD STAT DVD STAT ST/DO IC2018 TUN DO TUN DI C2CBJG000401 TUN SD SYSTEM CONTROL TUN CE TUN CLK POWER SUPPLY (FM:ON) (FM) SA-HT720GCP BLOCK DIAGRAM...
Muting Switch QR8571 Switch Q8550 Switch Q8560 Switch IC8691 AND GATE LOGIC IC Q8562 Q8561 LD Drive LD Drive OPTICAL PICKUP UNIT IC8695 AND GATE LOGIC IC Q8552 LD Drive Q8551 TC8004 TC8010 LD Drive K8004 K8009 SA-HT720GCP DVD MODULE(IN/OUT)CIRCUIT...
Page 46
: +B SIGNAL LINE : CD-DA SIGNAL LINE : DVD(VIDEO) SIGNAL LINE : DVD(AUDIO) SIGNAL LINE IC8051 64M SDRAM IC8651 RFKFMH81T160 IC8611 C3EBGZ000001 EEPROM IC (Not supplied) IC8001 DV2.1 LSI IC8601 IC8605 RESET IC Voltage Detecting IC SA-HT720GCP DVD MODULE(DV2)CIRCUIT...
Page 47
R2873 27K R2874 56K EECS DVD A+5V Q2100 ADAC5V B1GFGCAA0001 R2090 4.7K Muting Switch EECLK VGND C2019 Q2026 50V330 B1GDCFGA0014 YGND Muting Control CR R LINE L CR/PR/R C2106 VGND R2872 50V4.7 CB B CR/PB/B VGND PY/Y/G VGND SA-HT720GCP MAIN CIRCUIT...
Page 56
SA-HT720GCP A A A A TRAY MOTOR P.C.B. LOADING MOTOR P.C.B. (REP3466A) (REP3465A) M9101 Q9102 M9001 SENSOR P.C.B. (REPX3466A) Q9103 CN9102 SA-HT720GCP LOADING MOTOR/TRAY MOTOR/SENSOR P.C.B.
SA-HT720GCP 24 Terminal Function of ICs 24.1. IC2018 (C2CBJG000401): Terminal Function Name System control Not used, open Analog surround signal output Terminal Function Not used, open Name PARTY Analog surround signal output LOAD UP/DOWN switch signal input Not used, open...
SA-HT720GCP 25 Parts Location and Replacement Parts List Notes: *Important safety notice: Components identified by mark have special characteristics important for safety purpose. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used.
Page 65
SA-HT720GCP 25.1.2. Traverse and Cabinet Parts List Ref. Part No. Part Name & Description Remarks RMR1447-X MAGNET HOLDER Ref. Part No. Part Name & Description Remarks RMR1596-K MIDDLE CHASSIS RMR1507-X SUPPORT PIECE RMS0789 FIXED PIN CABINET AND CHASSIS RMS0802-J DRIVE GEAR SHAFT...
SA-HT720GCP 25.2. Component Parts List Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks Q2028 B1GBCFJN0021 TRANSISTOR PRINTED CIRCUIT BOARD Q2029 B1GBCFJN0021 TRANSISTOR Q2100 B1GFGCAA0001 TRANSISTOR REP3654G DVD MODULE P.C.B. Q2101 B1GFGCAA0001 TRANSISTOR...
Page 67
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D2036 B0ACCK000005 DIODE S6902 EVQ21405R SW DISC 1 D2039 B0ADCJ000020 DIODE S6903 EVQ21405R SW DISC 2 D2040 B0ACCK000005 DIODE S6904 EVQ21405R SW DISC 3...
Page 68
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks FL6901 A2BD00000082 FL DISPLAY W2058 ERJ6GEY0R00V 0 1/10W FL8101 F1H0J1050022 1 6.3V W2059 ERJ6GEY0R00V 0 1/10W FL8102 F1H0J1050022 1 6.3V W2060 ERJ6GEY0R00V 0 1/10W...
Page 69
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R2038 ERJ3GEYJ221V 220 1/16W R2123 ERJ3GEYJ103V 10K 1/16W R2039 ERJ3GEYJ221V 220 1/16W R2124 ERJ3GEYJ103V 10K 1/16W R2040 ERJ3GEYJ221V 220 1/16W R2125 ERJ3GEYJ222V 2.2K 1/16W...
Page 70
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R2244 D0GB332JA002 3.3K 1/16W R2512 ERJ3GEYJ103V 10K 1/16W R2245 ERJ3GEYJ682V 6.8K 1/16W R2513 D0GB273JA002 27K 1/16W R2246 D0GB333JA002 33K 1/16W R2514 ERJ3GEYJ103V 10K 1/16W...
Page 71
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R2857 ERJ3GEYJ153V 15K 1/16W R6915 ERJ3GEYJ102V 1K 1/16W R2858 D0GB393JA002 39K 1/16W R6916 ERJ3GEYJ680V 68 1/16W R2859 ERJ3GEYJ472V 4.7K 1/16W R6917 ERJ3GEYJ102V 1K 1/16W...
Page 72
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R8562 ERJ3GEYJ331V 330 1/16W C2040 ECA0JM102B 1000 6.3V R8563 ERJ3GEYJ102V 1K 1/16W C2041 ECEA0JKA101B 100 6.3V R8564 D0GB100JA002 10 1/16W C2042 ECA0JM102B 1000 6.3V...
Page 73
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C2138 ECJ1VC1H221J 220P 50V C2263 ECEA1HKA3R3B 3.3 50V C2139 ECJ1VC1H101K 100P 50V C2264 ECEA1HKA100I 10 50V C2140 ECJ1VB1H681K 680P 50V C2265 ECJ1VB1H272K 2700P 50V...
Page 74
SA-HT720GCP Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C2827 ECJ1VB1E103K 0.01 25V C8215 ECJ1VB1H562K 5600P 50V C2828 ECUV1C104KBV 0.1 16V C8216 ECJ1VB1C183K 0.018 16V C2829 ECUV1C104KBV 0.1 16V C8217 F1H0J1050013 1 6.3V...