Panasonic SAHT-720-P, SAHT-720-PC Service manual

ORDER NO.MD0401026C1

DVD Home Theater Sound System

SA-HT720P SA-HT720PC

Colour

(S).......................Silver Type

Specifications

lGeneral

Power Source:

Power consumption: 25 W

Dimensions (W×H×D):

Mass:

lAmplifier section

RMS Output Power: Dolby Digital Mode

lTotal RMS Dolby Digital

mode Power:

At 1kHz and total harmonic of 10%

lFront: 70 W/ Channel (4Ω) lCenter: 260 W/ Channel (4Ω) lSurround: 70 W/ Channel (4Ω)

At 100Hz and total harmonic of 10%

lActive subwoofers: 260 W/ Channel (4Ω)

FTC Output Power: Dolby Digital Mode:

lTotal FTC Dolby Digital mode Power:

At 120Hz-20kHz and total harmonic of 1%

lFront: 45 W/ Channel (4Ω) lCenter: 140 W/ Channel (4Ω)

C 120V, 60Hz

430×68×432 mm

(16-15/16”×2-11/16”×17”)

4.1 kg (9.0Ibs)

800 W

470 W

lSurround: 45 W/ Channel (4Ω)

At 45Hz-120Hz and total harmonic of 1%

lSubwoofer: 150 W/ Channel (4Ω)

lFM tuner section

Frequency Range:

Sensitivity: 2.5µV (IHF)

S/N 26dB Antenna Terminal: 75Ω (non balance)

lAM tuner section

Frequency Range: 520-1710kHz (10kHz in step)

AM Sensitivity S/N 20dB at 999kHz:

Phone Jack:

Terminal:

lDisc section

Discs played [8 cm (3”) or 12 cm (5”)]:

(1) DVD-RAM (DVD-VR compatible, JPEG formatted discs)

(2) DVD-Audio

(3) DVD-Video

87.9-107.9MHz

(200kHz in step)

87.5-108.0MHz

(100kHz in step)

2.2µV

560µV/m

Stereo 3.5mm (1/8”) jack

SA-HT720P / SA-HT720 PC

(4) DVD-R (DVD-Video compatible)

(5) CD-Audio (CD-DA)

(6) Video CD

(7) SVCD (Conforming to IEC62107)

(8) CD-R/CD-RW (CD-DA, Video-CD, SVCD, MP3, WMA, JPEG

formatted discs)

(9) MP3/WMA

lMaximum number of recognizable audio and picture contents and groups:

lCompatible compression rate:

(10) JPEG

lExif Ver 2.1 JPEG Baseline files

lPicture resolution: between 320 x 240 and 6144 x 4096

pixels (sub sampling is 4:2:2 or 4:2:0)

(11) HighMAT Level 2 (Audio and lmage)

Pick up:

Source of light beam: Semiconductor Laser

Wavelength:

lCD: 785nm

lDVD: 662nm

Audio output (DISC):

Number of channels:

Audio performance:

Frequency response:

DVD (linear audio):

DVD-Audio: 4 Hz-88 kHz (192 kHz

CD-Audio:

S/N ratio:

CD-Audio: 95 dB

Dynamic range:

DVD (linear audio): 95 dB

CD-Audio: 93 dB

Total harmonic distortion:

CD-Audio: 0.005 %

lVideo section

ideo system:

Signal system: NTSC

Composite video output:

Output level: 1 Vp-p (75 Ω)

Terminal: Pin jack (1 system)

4000 audio and picture contents and 400 groups

MP3: between 32 kbps and 320 kbps

WMA: between 48 kbps and 320 kbps

5.1 ch (FL, FR, C, SL, SR, SW)

4 Hz-22 kHz (48 kHz sampling)

4 Hz-44 kHz (96 kHz sampling)

sampling)

4 Hz-20 kHz

S-video output:

output level: 1 Vp-p (75 Ω)

C output level: NTSC; 0.286 Vp-p (75 Ω)

Terminal S terminal (1 system)

Component video output (480P/480I):

output level: 1 Vp-p (75 Ω)

output level: 0.7 Vp-p (75 Ω)

Terminal: Pin jack (Y: green, PB: blue,

: red) (1 system)

Power consumption in standby mode:

approx 0.4W

Note:

1. Specifications are subject to change without notice.

Mass and dimensions are approximate.

2. Total harmonic distortion is measured by the digital spectrum analyzer.

Solder:

This model uses lead free solder (PbF).

SA-HT720P / SA-HT720 PC

CONTENTS

Page Page

1 Use of Active Subwoofer 4

1.1. Checking Player when Active Subwoofer is not used

2 Safety Precautions

2.1. GENERAL GUIDELINES

3 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

4 Before Repair and Adjustment (Using Active Subwoofer)

5 Protection Circuitry

6 Precaution of Laser Diode

7 About Lead Free Solder (PbF)

8 General Description

8.1. Operating instructions

8.2. Disc information

9 Accessories

10 Handling Precautions for Optical Pickup Unit

10.1. Cautions to Be Taken in Handling the Optical Pickup Unit

10.2. Cautions to Be Taken When Replacing the Optical Pickup

10.3. Grounding for electrostatic breakdown prevention

11 Disassembly and Main Component Replacement Procedures

11.1. Disassembling the Top Cabinet

11.2. Disassembling the Front Panel

11.3. Disassembling the Tray Assembly

11.4. Removal of the Tray Base Guide (L) and Tray Base Guide

(R)

11.5. Removal of the Rotary Tray

11.6. Removal of the Open Lock Gear

11.7. Removal of the Close Lock Gear

11.8. Removal of the Tray Motor P.C.B. and Sensor P.C.B.

11.9. Removal of the CD Traverse Unit

11.10. Removal of the Pulley Gear

11.11. Removal of the Loading Motor P.C.B.

11.12. Removal of the Drive Gear (A) & (B)

11.13. Disassembling the Fixed Plate, Magnet and Clamper

11.14. Removal of the Cam Gear & Support Piece

11.15. Removal of the Slide Plate (L) & (R) and Change Lever

11.16. Assembly of Tray Base

12 DVD-Optical Pick-up Self-Diagnosis and Replacement

Procedure

12.1. Optical Pickup Breakdown Diagnosis

12.2. Service Mode Table 1

12.3. DVD Self Diagnostic Function-Error Code

12.4. Last Error Code saved during NO PLAY

12.5. Service mode table 2

12.6. Sales demonstration lock function

12.7. Handling After Completing Repairs

13 Self-Diagnosis Function

13.1. Automatic Displayed Error Codes

13.2. Memorized Error Codes

14 Service Precautions

14.1. Recovery after the DVD player is repaired

14.2. Firmware version-up of the DVD player

15 Adjustment Procedure

15.1. Service Tools and Equipment

15.2. Important points in adjustment

15.3. Storing and Handling Test Discs

15.4. Optical adjustment

16 Abbreviati ons

17 Voltage Chart

17.1. DVD Module P.C.B.

17.2. Main P.C.B.

17.3. FL P.C.B.

17.4. Loading Motor P.C.B.

17.5. Tray Motor P.C.B.

17.6. Sensor P.C.B.

18 Schematic Diagram Notes

19 Block Diagram

20 Schematic Diagram

21 Printed Circuit Board Diagram

22 Wiring Connection Diagram 23 Illustration of IC 痴, Transistors and Diodes

24 Terminal Function of ICs

24.1. IC2018 (C2CBHG000137): Operation CPU

25 Parts Location and Replacement Parts List

25.1. Loading Mechanism, Traverse Unit & Cabinet

25.2. Component Parts List

25.3. Packing Materials & Accessories Parts List

25.4. Packaging

SA-HT720P / SA-HT720 PC

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.

2. If the active subwoofer is not available due to repair of the unit, use the following equipment.

Jig product number: RFKZ0182 (110V, 127V, 220V, 230V-240V for overseas domestic use)

SA-HT720P / SA-HT720 PC

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.

3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

2.1.1. LEAKAGE CURRENT COLD

CHECK

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to thechassis, the reading should be between

1MΩ and 5.2MΩ.

When the exposed metal does not have a return path to

the chassis, the reading must be

Figure 1

2.1.2. LEAKAGE CURRENT HOT CHECK (See Figure 1 .)

1. Plug the AC cord directly into the AC outlet. Do not use an

isolation transformer for this check.

2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF

capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1 .

3. Use an AC voltmeter, with 1000 ohms/volt or more

sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the

voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the

above measurements.

6. The potential at any point should not exceed 0.75 volts

RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current mu3st not exceed 1/2 milliamp. In case a measurement is outsideof the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

3 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistorsand semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage caused by electro static discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available dischargingESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparableconductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

SA-HT720P / SA-HT720 PC

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).

4 Before Repair and Adjustment (Using Active Subwoofer)

Disconnect AC power, discharge Power Supply Capacitors C546~C549 through a 10 Ω, 10 W resistor to ground.

DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.

After repairs are completed, restore power gradually using a variac, to avoid overcurrent.

Current consumption at AC 120 V, 60 Hz in NO SIGNAL mode should be ~ 1000 mA.

5 Protection Circuitry

The protection circuitry may have operated if either of the following conditions are noticed:

· No sound is heard when the power is turned on.

· Sound stops during a performance.

The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are

“shorted”, or if speaker systems with an impeda nce less than the indicated rated impedance of the amplifier are used.

If this occurs, follow the procedure outlines below:

1. Turn off the power.

2. Determine the cause of the problem and correct it.

3. Turn on the power once again after one minute.

Note:

When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.

SA-HT720P / SA-HT720 PC

6 Precaution of Laser Diode

CAUTION:

This unit utilizes a class 1 laser.

Invisible laser radiation is emitted from the optical pickup lens.

Wavelength: 662nm(DVD)/785nm(VCD/CD).

Maximum output radiation power from pickup: 100µW/VDE

When the unit is turned on:

1. Do not look directly into the pick up lens.

2. Do not use optical instruments to look at the pick up lens.

3. Do not adjust the preset variable resistor on the pickup lens.

4. Do not disassemble the optical pick up unit.

5. If the optical pick up is replaced, use the manufacturer’s specified replacement pick up only.

6. Use of control or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

7 About Lead Free Solder (PbF)

Distinction of PbF PCB: PCBs (manufacture d) using lead free solder will have a Pbf stamp on the PCB.

Caution:

· Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher.

Please use a high temperature soldering iron. In case of the soldering iron with temperature control,please set it to 700 ± 20°F (370 ± 10°C).

· Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C).

When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough.

SA-HT720P / SA-HT720 PC

8 General Description

8.1. Operating instructions

STANDBY/ON INDICATOR

INPUT SELECTOR

STOP/ FM MODE

CD MODE/

TUNE MODE

DISC EXCHANGE

TUNING

OPEN/CLOSE

INPUT

1 2 3 4 5

SELECTOR

POWER

5 DISC SELECTOR

INDICATIOR

STANDBY/ ON

()

POWER

/AV SYSTEM

AUX

TV/VIDEO

DISC 1-5

Numbered buttons

CANCEL

AV SYSTEM

TV/VIDEO

TUNER/BAND

AUX

DISC 1 DISC 2 DISC 3

123

DISC 4 DISC 5

456 7809

ENTER

CANCEL

SLOW/SEARCH

SKIP

VCR

DVD/CD

VOLUME

C.S.M

PROGRESSIVE

CD MODE

TUNE MODE

C.S.M

PROGRESSIVE

TUNER/BAND

DVD/CD

VOLUME

FM MODE MEMORY

TUNING

MEMORY

VOLUME

DOWN

VOLUME

OPEN/CLOSE

DISC EXCHANGE

DISC SKIP

PHONES

DISC SKIP

TOP MENU

ENTER

DISPLAY/ TV VOL

SHIFT

TOP MENU

DIRECT

NAVIGATOR

DISPLAY

TV VOL

SUBWOOFER

LEVEL

SLEEP C.S.M

FL DISPLAY

SHIFT

ENTER

SFC

POSITION MEMORY

PAGE

GROUP

TEST

CH SELECT

C.FOCUS

SUPER SRND

ZOOM

AUDIO

CD MODE

QUICK REPLAY

PLAY

LIST

RETURN

TV VOL

MIX 2CH

SETUP

MUTING

REPEAT

PLAY MODE

SUBTITLE

RETURN/ TV VOL

SUBWOOFER

LEVEL

SLEEP C.S.M

FL DISPLAY

SFC

POSITION MEMORY

PAGE

GROUP

TEST

CH SELECT

C.FOCUS

SUPER SRND

ZOOM

AUDIO

CD MODE

QUICK REPLAY

MIX 2CH

SETUP MUTING

REPEAT

PLAY MODE

SUBTITLE

8.2. Disc information

SA-HT720P / SA-HT720 PC

9 Accessories

5 Speaker cables

(4m×3, 10m×2)

Remote control

AC power supply cord

AM loop antenna

Antenna plug

FM indoor antenna

Video Cable

System cable

SA-HT720P / SA-HT720 PC

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 handlin g the laser diode.

10.1. Cautions to Be Taken in Handling the Optical Pickup Unit

The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body. Use due caution to electrostatic discharge damage when servicing the laser diode.

1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.

2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed from the PCB should be short-circuited with a short pin or a clip.

3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handlin g the flexible cable.

4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexible cable, cut off the antistatic FPC.

10.2. Cautions to Be Taken When Replacing the Optical Pickup

The flexible cable of the optical pickup unit which was supplied as a component is equipped with a short clip to prevent the laser diode from being damaged due to electrostatic discharge. Remove the short clip before connecting the flexible cableand make sure that the short land is open. (If the flexible cable is short-circuited, remove the solder.)

10.3. Grounding for electrostatic breakdown prevention

Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electricity in the working environment. Proceed servicing works under the working environment where grounding works is completed.

10.3.1. Worktable grounding

1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.

SA-HT720P / SA-HT720 PC

10.3.2. Human body grounding

1. Use the anti-static wrist strap to discharge the static electricity form your body.

SA-HT720P / SA-HT720 PC

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.

2. For assembly after operation checks or replacement, revers e the respective procedures.

Special reassembly procedures are described only when required.

3. Select items from the following index when checks or replacement are required.

· Disassembly the Top Cabinet

· Disassembly the Front Panel

· Disassembly the Tray Assembly

· Removal of the Tray Base Guide (L) and Tray Base Guide (R)

· Removal of the Rotary Tray

· Removal of the Open Lock Gear

· Removal of the Close Lock Gear

· Removal of the Tray Motor P.C.B.and Sensor P.C.B.

· Removal of the CD Traverse Unit

· Removal of the Pulley Gear

· Removal of the Loading Motor P.C.B.

· Removal of the Drive Gear (A) & (B)

· Disassembly the Fixed Plate, Magnet and Clamper

· Removal of the Cam Gear & Support Piece

· Removal of the Slide Plate (L) & (R) and Changer Lever

· Assembly of Tray Base

SA-HT720P / SA-HT720 PC

11.1. Disassembling the Top Cabinet

Step 1 Remove 7 screws.

Step 2 Remove the top cabine t 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 unlock the claws of the chassis ass’y.

Step 2 Remove the front panel ass’y in the direction of arrow.

11.3. Disassembling the Tray Assembly

· Follow the (Step 1) - (Step 2) of Item 11.1.

· Follow the (Step 1) - (Step 4) of Item 11.2.

Step 1 Keep the close lock gear pressed in clockwise, move the tray assembly in the direction of the arrow.

Step 3 Pull out the FFC from connectors (CN6801 & CN6901).

· Checking of Headphone P.C.B. and FL P.C.B.

Step 2 Hold close lock gear, push and release the 4 claws in the direction of arrow, and then remove the tray assembly.

SA-HT720P / SA-HT720 PC

Step 3 Pull out FFC CN6002.

Step 4 Remove 4 screws.

· Checking of Main P.C.B., Tray Motor and Sensor P.C.B.

· Checking of Loading Motor P.C.B. and DVD Module P.C.B.

Step 5 Upset base assembly in vertical position.

SA-HT720P / SA-HT720 PC

11.4. Removal of the Tray Base Guide (L) and Tray Base Guide (R)

· 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.

Step 1 Remove the 2 screws.

Step 2 Remove the tray base guide (L) and tray guide (R) in the

direction of arrow.

Step 1 Rotate open lock gear in the direction of arrow. (Anticlockwise)

11.5. Removal of the Rotary Tray

· 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.

Step 1 Remove tray screw, tray spring and teflon washer.

Step 2 Remove rotary tray.

Step 2 Release claw of open lock gear, remove open lock gear

in the direction of arrow.

11.7. Removal of the Close Lock Gear

· 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.

· Follow the (Step 1) - (Step 2) of Item 11.5.

Step 1 Remove 1 screw.

11.6. Removal of the Open Lock Gear

· 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.

· Follow the (Step 1) - (Step 2) of Item 11.5.

Step 2 Hook close lock spring to claw (a).

Step 3 Rotate close lock gear to direction of arrow, press claw (b) and pull out close lock gear.

SA-HT720P / SA-HT720 PC

11.8. Removal of the Tray Motor P.C.B. and Sensor P.C.B.

· 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.

Step 1 Remove 2 screws.

Step 2 Release 4 claws at Tray Motor P.C.B. and Sensor

P.C.B.

Step 2 Flip the base mecha unit in vertical position.

Step 3 Press upward (a), push backward (b) and press to left

11.10. Removal of the Pulley Gear

· 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.

Step 1 Remove of the loading belt.

11.9. Removal of the CD Traverse Unit

· 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.

Step 1 Rotate cam gear anti-clockwise. (Align at position (A) as marking on gear with arrow)

Step 2 Flip the base mecha.

SA-HT720P / SA-HT720 PC

Step 3 Release the 2 claws in the direction of arrow (1), and

then push the pulley pin in the direction of arrow (2).

push drive gear shaft up.

Step 2 Remove Drive Gear (A) and Drive Gear (B).

11.11. Removal of the Loading Motor P.C.B.

· 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.

Step 1 Remove 2 screws.

11.13. Disassembling the Fixed Plate, Magnet and Clamper

· 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.

Step 1 Release 3 claws in the direction of arrow.

Step 2 Remove Loading Motor P.C.B.

11.12. Removal of the Drive Gear (A) & (B)

· 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.

Step 1 Release the claw in the direction of arrow (1), and then

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 1 screw and support piece.

SA-HT720P / SA-HT720 PC

Step 2 Remove slide plate (L) & (R) and change lever as arrow

shown.

11.15. Removal of the Slide Plate (L) & (R) and Change Lever

· Follow the (Step 1) - (Step 5) of Item 11.3.

Step 1 Press the claw and push the Slide Plate (L) up.

SA-HT720P / SA-HT720 PC

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-HT720P / SA-HT720 PC

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" is displayed. As a guideline, you should replace the optical pickup when the value of the laser drive current is more than 55.

Note:

Press the power button to turn on the power, and check the value within three minutes before the unit warms up. (Otherwise, the result will be incorrect.)

SA-HT720P / SA-HT720 PC

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 0 Error code display (Refer to the item, “12.3.

5 Tilt adjustment Refer to the item “15.4.

6 Area number and broadcasting system check 7 Built-in program version check

DISPLAY DVD laser drive current check Refer to the item “12.1.

3 CD laser drive current check

PAUSE Writing of laser drive current value after replacement of optical

≧10

pickup (Do use this function only when optical pickup is replaced.)

Initialization of the player (factory setting is restored.) Used after replacement of micro-computer and its peripherals and printed circuit board.

DVD Self Diagnostic Function-Error Code ”).

Optical adjustment”).

Optical Pickup Breakdown Diagnosis ”.

12.3. DVD Self Diagnostic Function-Error Code

Error Code Error Content Additional error explanation

U, H error U11 Focus error H01 Tray loading error H02 Spindle servo error (Spindle servo, DSC (IC3001) SP motor, CLV servo error) H03 Traverse servo error H04 Tracking servo error H05 Seek error H06 Power error Cannot switch off the power because of the panel and system computer communication error H07 Spindle motor drive error

DSC related F500 DSC error DSC (IC3001) stops in the occurrence of servo error (starup, focus error, etc.) F501 DSC not Ready DSC-system computer communication error (Communication failure caused by idling of DSC) F502 DSC Time out error Similar disposal as F500 F503 DSC communication Failure Communication error (result error occurred although communication command was sent) F504 Error adjusting DSC data slice offset F505 DSC Attention error Similar disposal as F500 F506 Invalid media Disc is flipped over, TOC unreadable, incompatible disc

ODC related F600 Access failure to management

information caused by demodulation

error F601 Indeterminate sector ID requested Operation stopped caused by the request to access abnormal ID data F602 Access failure to LEAD-IN caused by

demodulation error F603 Access failure to KEYDET caused by

demodulation error F610 ODC abnormality No permission for command execution F611 6626 QCODE don’t read Error Access failure to seek address in CD series F612 No CRC OK for a specific time Access failure to ID data in DVD series F620 Laser safeguard: high temperature

condition F621 Laser safeguard: circuit failure

condition F630 No reply to KEY DET enquiry (for internal use only) F631 CPPM KEY DET is not available till

the FILE terminal F632 CPPM KEY DET is not available Been revoked or falsified

Disc code F103 Illegal highlight Position Big possibility of disc specification violation during highlight display

HIC Error F4FF Force initialize failure (time out)

Micro computer error F700 MBX overflow When replying message to disc manager F701 Message command does not end Next message is sent before replying to disc manager F702 Message command changes Message is changed before it is sent as a reply to disc manager F880 Task number is not appropriate Message coming from a non-existing task

Operation stopped because navigation data is not accessible caused by the demodulation defect

LEAD IN data unreadable

Access failure to CSS data of disc

(CPPM file system is unreadable caused by scratches)

SA-HT720P / SA-HT720 PC

Error Code Error Content Additional error explanation

F890 Sending message when message is

being sent to AV task F891 Message couldn’t be sent to AV task Begin sending message to AV task F893 FROM falsification F894 EEPROM abnormality F895 Language area abnormality Firm version agreement check for factory preset setting failure prevention F896 No existence model Firm version agreement check for factory preset setting failure prevention F897 Initialize is not completed Initialize completion check for factory preset setting failure prevention F898 Disagreement of hardware and

software F8A0 Message command is not appropriate Begin sending message to AV task

Sending message to AV task

Unsuitable combination of AV DECORDER, SDRAM and FLASH ROM (firmware)

Note:

An error code will be canceled if a power supply is turned OFF.

*1: CPPM is the copy guard function beforehand written in the disk for protection of copyrights.

12.4. Last Error Code saved during NO PLAY

Error code Error Content System computer Setting task System computer internal error code

F0BF 6) Cannot playback because

physical layer is not recognizable

F0C0 8) DVD: Cannot playback because it

is not DVD Video/Audio/VR

F0C1 9) DVD: Prohibited by the restricted

region code F0C2 A) DVD: PAL restricted playback PCND_NOPLAY PAL 0x90 DiscManager 0xDOC2 F0C3 B) DVD: Parental lock setting

prohibits the playback of the entire

title F0C4 C) VCD: Prohibited because it is in

PHOTO CD format F0C5 VCD/CD: Prohibited because it is

CDROM without CD-DA

PCND_NOPLAY PHYSICAL 0x50

PCND_NOPLAY VIDEO 0x70 DiscManager 0xDOC0

PCND_NOPLAY RCD 0x80 DiscManager 0xDOC1

PCND_NOPLAY PTL 0xA0 DiscManager 0xDOC3

PCND_NOPLAY PHOTO CD 0xB0

PCND_NOPLAY CDROM 0xC0 DiscManager 0xDOC5

DriveManager 0xDOBF

DiscManager 0xDOC4

+ 52 hidden pages