Panasonic SAHT-680-PL Service manual

ORDER NO. MD0502028C3

DVD Home Theater Sound System

SA-HT680PL

Colour

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

Specifications

lGeneral

Power Source:

Power consumption: 280 W

Dimensions (W×H×D): 430×105×381 mm

Mass: 7.1 kg

lAmplifier section

RMS Output Power: Dolby Digital Mode

lTotal RMS Dolby Digital

mode Power:

At 1kHz and total harmonic of 10%

lFront:

lCenter:

lSurround:

At 100Hz and total harmonic of 10%

lActive subwoofers:

FTC Output Power: Dolby Digital Mode:

lTotal FTC Dolby Digital mode Power:

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

lFront:

lCenter:

lSurround:

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

lSubwoofer:

C 120V, 60Hz

600 W

55 W/ Channel (6Ω)

160 W/ Channel (6Ω)

55 W/ Channel (6Ω)

220 W/ Channel (4Ω)

390 W

35 W/ Channel (6Ω)

110 W/ Channel (6Ω)

35 W/ Channel (6Ω)

140 W/ Channel (4Ω)

lFM tuner section

Frequency Range: 87.9-107.9MHz

(200kHz in step)

87.5-108.0MHz

(100kHz in step)

Sensitivity: 2.5µV (IHF)

S/N 26dB 2.2µV

Antenna Terminal: 75Ω (non balance)

lAM tuner section

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

AM Sensitivity S/N 20dB at 1000kHz:

Phone Jack:

Terminal: Stereo 3.5mm jack

lDisc section

Discs played [8 cm or 12 cm]:

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

(2) DVD-Audio

(3) DVD-Video

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

+R, +RW (Video compatible)

(5) CD-Audio (CD-DA)

(6) Video CD

(7) SVCD (Conforming to IEC62107)

560µV/m

SA-HT680PL

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

formatted discs)

(9) MP3/WMA

lCompatible compression rate:

MP3: between 32 kbps and 320 kbps

WMA: between 48 kbps and 320 kbps

lMaximum number of recognizable audio and picture contents and groups:

4000 audio and picture contents and 400 groups

(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)

lMaximum number of recognizable audio and picture contents and groups:

4000 audio and picture contents and 400 groups

(11) HighMAT Level 2 (Audio and lmage)

Pick up:

Source of light beam: Semiconductor Laser

Wavelength:

lCD:

lDVD:

Audio output (DISC):

Number of channels: 5.1 ch (FL, FR, C, SL, SR,

lVideo section

ideo system:

Signal system: NTSC

Composite video output:

Output level: 1 Vp-p (75 Ω)

Terminal: Pin jack (1 system)

S-video output:

output level: 1 Vp-p (75 Ω)

C output level:

Terminal S terminal (1 system)

Component video output (480P/480I):

output level: 1 Vp-p (75 Ω)

PBoutput level: 0.7 Vp-p (75 Ω)

PRoutput level: 0.7 Vp-p (75 Ω)

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

Power consumption in standby mode:

785nm

662nm

SW)

NTSC; 0.286 Vp-p (75 Ω)

: red) (1 system)

approx 0.5W

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).

CONTENTS

Page Page

1 Safety Precautions

1.1. GENERAL GUIDELINES

2 Prevention of Electro Static Discharge (ESD) to

Electrostatically Sensitive (ES) Devices

SA-HT680PL

3 Before Repair and Adjustment 5

4 Protection Circuitry

5 Precaution of Laser Diode

6 About Lead Free Solder (PbF)

7 General Description

7.1. Operating instructions

7.2. Disc information

7.3. About HighMAT

8 Accessories

9 Handling Precautions for Optical Pickup Unit

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

9.2. Cautions to Be Taken When Replacing the Optical Pickup

9.3. Grounding for electrostatic breakdown prevention

10 Disassembly Main Component Replacement Procedure

10.1. Disassembly Procedure

10.2. Main Components and P.C.B. Locations

10.3. Disassemble Top Cabinet

10.4. Disassemble Front Panel

10.5. Disassemble CR16D Mechanism Unit

10.6. Disassemble Rear panel

10.7. Disassemble Main P.C.B.

10.8. Disassemble of Regulator P.C.B.

10.9. Disassemble of AC Inlet P.C.B. & Transformer P.C.B.

10.10. Disas semble of Power P.C.B.

10.11. Disas semble FL P.C.B. & Power Button P.C.B.

11 Assembling and Disassembling the Mechanism unit

11.1. Replacement for DVD traverse deck

11.2. Replacement for optical pickup unit

11.3. Assembling for traverse motor and spindle motor

11.4. Procedure for removing CR16D mechanism unit

11.5. CR16 mechanism disassembly procedure

11.6. CR16 mechanism assembly procedure

11.7. Disassembly for traverse mechanism

12 Service Position

12.1. Checking & Repair AC Inlet P.C.B

12.2. Checking & Repair FL P.C.B and Power BTN P.C.B.

12.3. Checking & Repair Main P.C.B., Power P.C.B, Regulator

P.C.B.

12.4. Checking & Repair DVD Module P.C.B.

13 Optical Pick-up Self-Diagnosis and Replacement Procedure

13.1. Optical Pickup Breakdown Diagnosis

13.2. Service Mode Table 1

13.3. DVD Self Diagnostic Function-Error Code

13.4. Service mode table 2

13.5. Sales demonstration lock function

13.6. Handling After Completing Repairs

14 Self-Diagnosis Function

14.1. Automatic Displayed Error Codes

14.2. Memorized Error Codes

15 Service Precautions

15.1. Recovery after the DVD player is repaired

15.2. Firmware version-up of the DVD player

16 Adjustment Procedure

16.1. Service Tools and Equipment

16.2. Important points in adjustment

16.3. Storing and handling of test discs

16.4. Optical adjustment

17 Abbreviations

18 Voltage Chart

18.1. DVD Module P.C.B.

18.2. Main P.C.B.

18.3. CD Loading P.C.B. & AC Inlet P.C.B. & Regulator P.C.B.

18.4. FL P.C.B.

18.5. Power P.C.B.

19 Wave Form Chart

20 Schematic Diagram Notes

21 Block Diagram

22 Schematic Diagram

23 Printed Circuit Board Diagram

24 Wiring Connection Diagram 25 Illustration of IC 痴, Transistors and Diodes

26 Terminal Function of ICs

26.1. IC2018 (C2CBJG000578): Operation CPU

27 Parts Location and Replacement Parts List

27.1. Loading Mechanism, Traverse Unit & Cabinet

27.2. Component Parts List

27.3. Packing Materials & Accessories Parts List

27.4. Packaging

28 Schematic Diagram for printing with letter size

102

111

112

113

SA-HT680PL

1 Safety Precautions

1.1. 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.

1.1.1. 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 the chassis, 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

1.1.2. 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 must not exceed 1/2 milliamp. In case a measurement is outside of 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.

2 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 transistors and 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 discharging ESD 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 comparable conductive 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-HT680PL

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).

3 Before Repair and Adjustment

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 ~ 650 mA.

4 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 impedance 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-HT680PL

5 Precaution of Laser Diode

CAUTION :

This product utilizers a class 1 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/VD E

Laser radiation from pick up unit is safety level, but be sure the followings:

1. Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.

2. Do not adjust the variable resistor on the pick up unit. It was already adjusted.

3. Do not look at the focus lens using optical instruments.

4. Recommend not to look at pick up lens for a long time.

6 About Lead Free Solder (PbF)

Distinction of PbF PCB: PCBs (manufactured) 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.

7 General Description

7.1. Operating instructions

Standby/on switch [POWER,

AC suppy indicator [AC IN]

OPEN/CLOSE

DISC CHANGE

Disc buttons/ indicators

SA-HT680PL

TUNING

TUNE MODE

/ /

]

Display

FM MODE

MEMORY

VOLUME

PHONES

SELECTOR

PROGRESSIVE

DISC CHECK

CD MODE

/AV

SYSTEM

TV/VIDEO

DISC

Numbered buttons

CANCEL

TOP MENU

ENTER

FUNCTIONS/ TV VOL

SHIFT

TUNER/BAND

DVD/CD

CH CH

VOLUME

RETURN/ TV VOL

SUBW SUPER SRND

OOFER

LEVEL

H.BASS

SLEEP

QUICK OSD

FL DISPLAY

ZOOM

CM SKIP

ANGLE / PAGE

GROUP

C.FOCUS

SFC

SUBTITLE

AUDI O

REPEAT

MIX 2CH

SETUP MUTING

CD MODE

PLAY MODE

ADVANCED PLAY SPPED TEST

DISC REVIEW

QUICK REPLAY CH SELECT

L o

v e

A l

b um

L o v

e A

l b u m

i c r o

s c o p i

SA-HT680PL

7.2. Disc information

Discs that can be played

Disc Logo

DVD-RAM

DVD-Audio

DVD-Video

Indication in

these operating

instructions

RAM

JPEG

DVD-A

DVD-V

Remarks

Recorded with devices using Version 1.1 of the Video Recording Format (a unified video recording standard), such as DVD video recorders, DVD video cameras, personal computers, etc.

Recorded using the DCF (Design rule for Camera File system) standard Vesion 1.0.

To play JPEG files, select “Play as Data Disc” in Other Menu.

—

Some DVD-Audio discs contain DVD-Video content. To play DVD-Video content, select “Play as DVD-Video” in Other Menu.

—

DVD-V

DVD-R

Panasonic DVD-R recorded and finalized on Panasonic DVD-Video recorders or DVD-Video cameras are played as DVD-Video on this unit.

—

Video CD

VCD

Conforming to IEC62107

SVCD

This unit is compatible with HDCD, but does not support the Peak Extend function (a function which expands the dynamic range of high level signals).

HDCD-encoded CD’s sound better because they are encoded with 20 bits, as compared with 16 bits for all other CD’s.

During HDCD play, “HDCD” lights on the unit’s display.

This unit can play CD-R/RW (audio recording disc) recorded with the formats on the left. Close the sessions or finalize the disc after recording.

HighMAT discs

WMA, MP3 or JPEG files only. To play without using the HighMAT function, select “Play as Data Disc” in Other Menu.

WMA

This unit is not compatible with Multiple Bit Rate (MBR: a file that contains

CD-R CD-RW

WMA

MP3

—

JPEG

VCD

the same content encoded at several different bit rates).

A process that allows play on compatible equipment. It may not be possible to play the above discs in all cases due to the type of disc or condition of the recording.

Discs that cannot be played

DVD-ROM, CD-ROM, CDV, CD-G, DVD+R, +RW , DVD-RW, SACD, DivX Video Discs and Photo CD, DVD-RAM that cannot be removed

Audio format of DVD’s

This unit automatically recognizes and

decodes discs with these symbols. from their cartridge, 2.6-GB and 5.2-GB DVD-RAM, and “Chaoji VCD” available on the market including CVD, DVCD and SVCD that do not conform to IEC62107.

Inserting a disc correctly

To clean disc

DVD-Audio, DVD-Video, Video CD, SVCD and CD

12 cm

Microscopic

Love Album

Neil Ruby's

Sundae GirlGreatest Hits

8 cm

Microscopic

Including

Love Album

Sundae Girl

Greatest Hits

Including

Neil Ruby's

Wipe with a damp cloth and then wipe dry.

DVD-RAM and DVD-R

Clean with an optional DVD-RAM/PD disc cleaner (LF-K200DCA1, where available). Never use cloths or cleaners for CD’s, etc.

Disc handling precautions

N e

i l

p l b

i c

c l

i n

g G i r

i r

p l b

c u m

G r e Ne

a te

y ' s

Insert the disc correctly into position as indicated in the diagrams above. Place only one disc on a tray. Insert the disc with the label side facing up.

Do not attach labels or stickers to discs (This may cause disc warping, rendering it unusable). Do not write on the label side with a ball-point pen or other writing instrument. Do not use record cleaning sprays, benzine, thinner, static electricity prevention liquids or any other solvent. Do not use scratch-proof protectors or covers. Do not use the following discs: – Discs with exposed adhesive from removed stickers or labels

(rented discs, etc). – Discs that are badly warped or cracked. – Irregularly shaped discs, such as heart shapes.

SA-HT680PL

7.3. About HighMAT

7.3.1. What’s HighMAT?

Consumers worldwide are using PCs to create their own collections of music, photos and even video by burning them onto CDs. But how these collections can be experienced across different devices can be confusing to navigate, time consuming to access for a DVD player, and be incomplete in terms of music information available to the customer.

HighMAT offers a solution to this growing consumer problem. HighMAT dramatically improves the digital media experience on consumer electronic devices by delivering a simple, standardized approach that allows consumers who have created personal collections of digital music, photography and video on their PC to:

>> Create a HighMAT CD or DVD which can be easily played back on consumer electronics devices such as CD and DVD players, and car stereos.

>> Move digital media files (using recordable media such as CD-R and CD-RW) between the PC and various playback devices such as CD and DVD players.

A new standard for creating personal media on consumer electronic devices, HighMAT enable easier and more seamless interoperability between Windows PCs and devices designed for your living room, or the car.

SA-HT680PL

7.3.2. Why take advantage of HighMAT?

A Problem Defined:Today, when consumers create their own digital audio, video or photo collections on CD-R or other physical formats, there are numerous, inconsistent ways that devices read the data. For the consumer, the playback experience can be confusing:

A Solution Created: HighMAT delivers a better digital media access experience by creating a standard approach for PCs to structure digital media on various physical formats and for playback devices to read the data.

7.3.3. Benefits of HighMAT?

Conventional HighMAT

Even though DVD player is CD-R/RW compatible, the inconsistent ways that various DVD players can read the music or photos files often leads to a confusing and inconsistant playba ck experince.

SA-HT680PL

HighMAT compatible products play content back with consistent interface. This includes products which are JPEG compatible products without HighMAT support.

SA-HT680PL

HighMAT is now available for CD Burning and in leading DVD Players. HighMAT is a new technology that is now available in leading software and consumer electronic devices to dramatically improve the digital media experience when you create homemade CDs HighMAT delivers a simple, standardized way for PC software and consumer electronics devices to talk to each other and work better together.

SA-HT680PL

When you create your homemade CDs with software that supports HighMAT CD burning, and then play them back on a DVD player that supports HighMAT, you get better, easier navigation. You get folders you can access with a single click of your DVD player´s remote control. You can view important information about your music like full song names, artist titles, album names and genre. And you can get faster startup on your home entertainment device.

To enjoy the benefits of HighMAT, all you need is software that supports HighMAT for CD burning of music or photos, as well as a home entertainment device like a DVD player that supports HighMAT for playback. Always look for the HighMAT logo on your software or home entertainment device to ensure it supports the HighMAT experience.

SA-HT680PL

8 Accessories

Speaker cables

Remote control

AC cord

AM loop antenna

Antenna plug

FM indoor antenna

Video Cable

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9 Handling Precautions for Optical Pickup Unit

The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be taken avoid to electrostatic breakdown when servicing and handling the laser diode.

9.1. 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. Special care must be taken avoid 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 handling 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.

9.2. 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 cable and make sure that the short land is open. (If the flexible cable is short-circuited, remove the solder.)

9.3. 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.

9.3.1. 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-HT680PL

9.3.2. Human body grounding

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

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10 Disassembly Main Component Replacement Procedure

“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, reverse the respective procedures.

Special reassembly procedures are described only when required.

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

· Disassembling the Top Cabinet

· Disassembling the Front Panel

· Disassembling the CR16D Mechanism Unit

· Disassembling of Rear panel

· Disassembling the Main P.C.B.

· Disassemble of Regulator P.C.B.

· Disassemble of AC Intel P.C.B.

· Disassemble of Power P.C.B.

· Disassemble of FL P.C.B. & Power Button P.C.B.

10.1. Disassembly Procedure

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10.2. Main Components and P.C.B. Locations

10.3. Disassemble Top Cabinet

Step 1 Unscrew the screws.

SA-HT680PL

Step 4 Remove front panel.

10.5. Disassemble CR16D Mechanism Unit

Step 2 Lift up & remove the top cabinet.

10.4. Disassemble Front Panel

· Follow the (Step 1) - (Step 2) of Item 10.3.

Step 1 Detach FFC at connector. (CN6900)

· Follow the (Step 1) - (Step 2) of Item 10.3.

Step 1 Unscrew the screws.

Step 2 Detach FFC cable at connectors. (CN2001, CN2004)

Step 3 Lift the CR16D mechanism unit vertically.

· Note : Refer to section 11 for disassembly of the

mechanism unit.

Step 2 Unscrew the screws.

Step 3 Release the tabs.

SA-HT680PL

10.6. Disassemble Rear panel

· Follow the (Step 1) - (Step 2) of Item 10.3.

Step 1 Detach wire at the connector. (CN2013)

Step 2 Unscrew the screws.

Step 3 Release the tabs.

Step 4 Remove rear panel.

10.7. Disassemble Main P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.6.

Step 1 Unscrew the screws.

Step 2 Detach FFC/wire at the connectors. (CN2000, CN2001,

CN2011, CN2004, CN2006)

Step 3 Release the tab.

Step 4 Remove Main P.C.B..

10.8. Disassemble of Regulator P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.6.

· Follow the (Step 1) - (Step 4) of Item 10.7.

Step 1 Unscrew the screws.

Step 2 Detach FFC at connector. (CN2007)

10.9. Disassemble of AC Inlet P.C.B. & Transformer P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.6.

· Follow the (Step 1) - (Step 4) of Item 10.7.

Step 1 Detach FFC/wire at connectors. (CN502, CN503)

Step 2 Unscrew the screws.

Step 3 Release the tabs.

SA-HT680PL

10.10. Disassemble of Power P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.6.

· Follow the (Step 1) - (Step 4) of Item 10.7.

Step 1 Unscrew the screws.

10.11. Disassemble FL P.C.B. & Power Button P.C.B.

· Follow the (Step 1) - (Step 2) of Item 10.3.

· Follow the (Step 1) - (Step 4) of Item 10.4.

Step 1 Remove the volume knob.

Step 2 Unscrew the screws.

Step 3 Lift up FL & Power Button P.C.B.

SA-HT680PL

11 Assembling and Disassembling the Mechanism unit

11.1. Replacement for DVD traverse deck

11.2. Replacement for optical pickup unit

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11.3. Assembling for traverse motor and spindle motor

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11.4. Procedure for removing CR16D mechanism unit

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1. Turn off by pressing power SW in the body.

2. Unplug AC power cord after the indication of [GOOD-BYE],

then disassemble the body.

3. Disassemble the body, and take out DVD loading mechanism.

4. Perform disassembly according to the following procedure for disassembly.

11.5. CR16 mechanism disassembly procedure

11.5.1. Gear for servicing information

· This unit has a gear which used for checking items (open/close of disc tray, up/down operation of traverse unit by manually) when servicing. (For gear information, that is described on the items for disassembly procedures.)

· For preparation of gear (for servicing), perform the procedures as follows.

· In case of re-servicing the same set, the “gear for servicing” may be took off because it had been used. So, the “gear for servicing” must be stored.

1. Remove the gear attached to top cover of DVD loading mechanism.

11.5.2. Replacement for the disc tray

2. Insert the hexagonal wrench (2.5mm) into the gear.

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11.5.3. Replacement for the traverse deck

· Follow the (Step 1) - (Step 10) of item 11.5.2.

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11.5.4. Disassembly for DVD loading unit

· Follow the (Step 1) - (Step 10) of item 11.5.2.

· Follow the (Step 1) - (Step 4) of item 11.5.3.

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