Panasonic SA HT885 Service Manual

ORDER NO.MD0510385C3

DVD Home Theater Sound System

SA-HT885WGC SA-HT885WGS

Colour

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

Specifications

lGeneral

Power Source:

Power consumption: 25 W

Dimensions (W×H×D): 430×60×348.3 mm

Mass: 2.7 kg

lGeneral (For digital transmitter and receiver)

Power Source:

Power consumption:

Digital transmitter

Digital receiver

Dimensions (W×H×D):

Digital transmitter

Digital receiver

Mass:

Digital transmitter

Digital receiver

Wireless module:

Frequency range

No. of channels

Bandwidth/Channel

RF Output Power

RF Output Impedance

C 110/127/220-230/240V,

50/60Hz

C 110-127/220-240V, 50/60

0.3 W

36 W

97×47.5×8.5 mm

103×215×178 mm

0.03 kg

2.3 kg

2.402-2.480 GHz

1MHz

14dBm (max)

50Ω

Type of Emissions:

Data Rate

lAmplifier section

RMS Output Power: Dolby Digital Mode

lTotal RMS Dolby Digital

mode Power:

At 1kHz and total harmonic of 10%

lFront: 60 W/ Channel (6Ω)

lCenter: 220 W/ Channel (6Ω )

lSurround: 60 W/ Channel (6Ω)

At 100Hz and total harmonic of 10%

lActive subwoofers: 240 W/ Channel (4Ω )

PMPO: 6000 W

DIN Output Power: Dolby Digital Mode:

lTotal DIN Dolby Digital mode Power:

At 1kHz and total harmonic of 1%

lFront: 40 W/ Channel (6Ω)

lCenter: 140 W/ Channel (6Ω )

lSurround: 40 W/ Channel (6Ω)

At 100Hz and total harmonic of 1%

lSubwoofer: 150 W/ Channel (4Ω)

lAmplifier section (For Wireless Receiver)

RMS Output Power: Dolby Digital Mode

At 1kHz and total harmonic of 10%

1 Mbps

700 W

450 W

SA-HT885WGC / SA-HT885WGS

lSurround: 60 W/ Channel (6Ω)

PMPO: 1000 W

lFM tuner section

Frequency Range: 87.5-108.0MHz

(50kHz in step)

Sensitivity: 2.5µV (IHF)

S/N 26dB 2.2µV

Antenna Terminal: 75Ω (non balance)

lAM tuner section (AM/MW)

Frequency Range:

522-1629kHz (9kHz in step)

520-1630kHz (10kHz in step)

AM Sensitivity S/N 20dB at 999kHz:

560µV/m

Phone Jack:

Terminal: Stereo 3.5mm jack

MIC Jack:

Sensitivity: 0.7 mv 1.2kΩ

Terminal: Mono 6.3 mm jack (2 systems)

lDisc section

Discs played [8 cm or 12 cm]:

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

MPEG4, DivX)

(2) DVD-Audio

(3) DVD-Video

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

compatible)

+R, +RW (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, MPEG4, DivX, HighMAT Level 2)

(9) MP3/WMA

lMaximum number of recognizable audio, picture and video contents and groups:

4000 audio, picture and video contents and 400 groups

lMPEG-1 Layer 3, MPEG-2 Layer 3

lWIndows Media Audio Ver.9.0 L3

Not compatible with multiple Bit Rate (MBR)

(10) DivX

lDivX 3.11,4.x, 5.x

GMC (Global Motion Compensation) is not supported.

lMaximum number of recognizable audio, picture and video contents and groups:

4000 audio, picture and video contents and 400 groups

(11) MPEG4

lMaximum number of recognizable audio, picture and video contents and groups:

4000 audio, picture and video contents and 400 groups

lData recorded with Panasonic SD multi cameras or DVD video recorders.

Comforming to SD VIDEO specifications (ASF standard)/ MPEG4 (Simple Profile) video system/G.7 26 audio system.

(12) JPEG

lMaximum number of recognizable audio, picture and video contents and groups:

4000 audio, picture and video contents and 400 groups

lExif Ver 2.1 JPEG Baseline files

lPicture resolution: between 160 x 120 and 6144 x 4096

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

(13) HighMAT Level 2 (Audio and lmage)

Pick up:

Wavelength:

lCD: 785nm

lDVD: 662nm

Laser power:

CLASS 2/ CLASS 3A

Audio output (DISC):

Number of channels:

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

Audio performance (measured at REC OUT terminal):

Frequency response:

DVD (linear audio): 10 Hz-22 kHz (48 kHz

sampling)

10 Hz-44 kHz (96 kHz sampling)

DVD-Audio:

10 Hz-88 kHz (192 kHz sampling)

CD-Audio: 10 Hz-20 kHz

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: PAL 625/50, PAL 525/60,

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: PAL; 0.3Vp-p (75 Ω)

NTSC; 0.286 Vp-p (75 Ω)

Terminal S terminal (1 system)

Component video output (480P/480I):

NTSC: 525(480)p/525(480)i,

PAL: 625(576)p/ 625(567)i:

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,

: red) (1 system)

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).

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CONTENTS

Page Page

1 Use of Active Subwoofer 5

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

8.3. Using of Receiver Unit (SH-FX50)

8.4. About HighMAT

9 Accessories

10 Caution for AC Cord

11 Handling Precaution s for Optical Pickup Unit

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

11.2. Cautions to Be Taken When Replacing the Optical Pickup

11.3. Grounding for electrostatic breakdown prevention

12 Disassembly and Main Component Replacement Procedure

12.1. Disassembly Procedure

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

12.3. Disassembling the Top Cabinet

12.4. Disassembling the Lid assembly (When taking out disc

manually)

12.5. Disassembling the Front Panel

12.6. Disassembling the FL P.C.B., Volume P.C.B. and MIC

P.C.B.

12.7. Disassembling the DVD mechanism Unit

12.8. Disassembling the DVD Module P.C.B.

12.9. Disassembling the Rear panel

12.10. Disassembling Main P.C.B.

12.11. Service Position

13 Assembling and disassembling the DVD mechanism Unit

13.1. Disassembly Procedure

13.2. Traverse Unit

13.3. Tray Unit

13.4. Loading section

13.5. Tray Loading P.C.B.

13.6. Optical Pickup Unit

13.7. Traverse Motor and Spindle Motor

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14 Optical Pick-up Self-Diagnosis and Replacement Procedure

14.1. Optical Pickup Breakdown Diagnosis

14.2. Service Mode Table 1

14.3. DVD Self Diagnostic Function-Error Code

14.4. Service mode table 2

14.5. Sales demonstrat ion lock function

14.6. Handling After Completing Repairs

15 Self-Diagnosis Function

15.1. Automatic Displayed Error Codes

15.2. Memorized Error Codes

16 Service Precautions

16.1. Recovery after the DVD player is repaired

16.2. Firmware version-up of the DVD player

17 Adjustment Procedure

17.1. Service Tools and Equipment

17.2. Important points in adjustment

17.3. Storing and Handling Test Discs

17.4. Optical adjustment

18 Abbreviati ons 45

19 Voltage Chart

19.1. DVD Module P.C.B.

19.2. Main P.C.B.

19.3. FL P.C.B. & MIC P.C.B & Tray Loading P.C.B.

20 Wave Form Chart

21 Schematic Diagram Notes

22 Block Diagram

23 Schematic Diagram

24 Printed Circuit Board Diagram

25 Wiring Connection Diagram

26 Illustration of IC's, Transistors and Diodes

27 Terminal Function of ICs

27.1. IC2018 (C2CBJG000672): System control

28 Parts Location and Replacement Parts List

28.1. Loading Mechanism, Traverse Unit & Cabinet

28.2. Component Parts List

28.3. Packing Materials & Accessories Parts List

28.4. Packaging

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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)

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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, carry out 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 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

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 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.

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 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 semiconducto r 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 sufficie nt 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.

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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 220 - 240 V, 50 Hz in NO SIGNAL mode should be ~ 600 mA.

Current consumption at AC 110/127 V, 50/60Hz in NO SIGNAL mode should be ~1180 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 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.

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6 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 : 658nm/780nm

Maximum output radiation power from pick up : 100µW/VDE

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.

7 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.

8 General Description

8.1. Operating instructions

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TV/AV

AUX

NUMBERED BUTTONS

CANCEL

TOP MENU

ENTER

FUNCTIONS/ TV VOL

SHIFT

AV SYSTEM

AUX

TV/AV

12 45

CANCEL

SKIP

TOP MENU

DIRECT

NAVIGATOR

ENTER

FUNCTIONS

SUBWOOFER

SUPER SRND

LEVEL

H.BASS

SLEEP

ZOOM

MANU

AL SKIP

QUICK OSD

ANGLE/PAGE

FL DISPLAY REPEAT

GROUP

ADVANCED

SHIFT

DISC REVIEW

TUNER/BAND

3 6

VOLUME

-/--

S 10

SLOW/SEARCH

C.FOCUS

SFC

SUBTITLE

AUDIO

PLAY SPEED

QUICK REPLAY

VCR

DVD/CD

PLAY

LIST

RETURN

TV VOLTV VOL

MIX 2CH

SETUP

MUTING

PLAY MODE

TEST

CH SELECT

/AV SYSTEM

TUNER/BAND, DVD/CD

CH CH

VOLUME

(SKIP)

(STOP) (PAUSE)

RETURN/TV VOL

SUBWOOFER

FL DISPLAY REPEAT

LEVEL

SLEEP

QUICK OSD

SUPER SRND

H.BASS

ZOOM

MANU

AL SKIP

ANGLE/PAGE

GROUP

ADVANCED

DISC REVIEW

(SLOW/SEARCH)

(PLAY)

C.FOCUS

SFC

SUBTITLE

AUDIO

PLAY SPEED

QUICK REPLAY

MIX 2CH

SETUP

MUTING

PLAY MODE

TEST

CH SELECT

STANDBY/ON INDICATOR

INPUT SELECTOR

INPUT SELECTOR PROGRESSIVE H.BASS

MIN MAX

MIC, MIC LEVEL

STANDBY/ON SWITCH

[/I

PROGRESSIVES/ H.BASS/H.BASS INDICATOR

]

OPENCLOSE

TUNE MODE FM MODE MEMORY

TUNING

DOWN

OPEN/CLOSE

TUNING

VOLUME

PHONES

REMOTE CONTROL SIGNAL SENSOR

PHONES

VOLUME

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8.2. Disc information

Discs that can be played

Disc

DVD-RAM

DVD-Audio

Logo

Indication in

these operating

instructions

RAM

JPEG

MPEG4MPEG4

DivX

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 with Panasonic SD multi cameras or DVD video recorders using the DCF (Design rule for Camera File system) Standard Version 1.0.

Recorded with Panasonic SD multi cameras or DVD video recorders [conforming to SD VIDEO specifications (ASF standard)/MPEG4 (Simple Profile) video system/G.726 audio system].

— — Some DVD-Audio discs contain DVD-Video content.

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

To play JPEG, MPEG4 or DivX video contents, select "Play as Data Disc" in Other Menu

DVD-Video

—

DVD-R (DVD-Video)/ DVD-RW (DVD-Video)

+R (Video)/ +RW (Video)

DVD-R (DivX-Video)/ DVD-RW (DivX-Video)

DVD-RW (DVD-VR)

DVD-V

Discs recorded and finalized on DVD video recorders or DVD video cameras.

—

DivX

DVD-RW (VR)

Discs recorded and finalized on DVD video recorders or DVD video cameras.

Finalize the disc after recording.

Discs recorded and finalized on DVD video recorders or DVD video cameras using Version 1.1 of the Video Recording Format (a unified video recording standard).

—

Video CD

VCD

Conforming to IEC62107

SVCD

This unit is compatible with HDCD, but does not support the Peak Extend

CD-R CD-RW

—

WMA MP3

JPEG

MPEG4MPEG4

DivX

VCD

Created using DivX ver.3.11, 4.x, 5.x [DivX video system/MP3, Dolby Digital or MPEG audio system].

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 discs, the condition of the recording, the recording method and how the files were created.

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.

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 does not support Multiple Bit Rate (MBR: a file that contains the

same content encoded at several different bit rates).

Discs that cannot be played

Version 1.0 of DVD-RW, DVD-ROM, CD-ROM,CDV, CD-G, SACD and Photo CD, DVD-RAM that cannot be removed 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.

Audio format of DVD's

This unit automatically recognizes and decodes discs with these symbols.

Video systems

–This unit can play PAL and NTSC, but your television must match

the system used on the disc. –PAL discs cannot be correctly viewed on an NTSC television. –This unit can convert NTSC signals to PAL 60 for viewing on a PAL

television.

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8.3. Using of Receiver Unit (SH-FX50)

· This model can be equipped with the digital transmitter and receiver to enjoy surround sound wirelessly..

8.3.1. Below is tips on using the digital receiver

8.3.2. Tips of using digital transmitter

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8.4. About HighMAT

8.4.1. 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:

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

lMove 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.

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8.4.2. 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 playba ck devices to read the data.

8.4.3. 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 playback experince.

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

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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.

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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.

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9 Accessories

Remote control

AM loop antenna

FM indoor antenna

Video Cable

AC cord

AC cord (For GS area)

System cable

Speaker label

Speaker cable

10 Caution for AC Cord

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11 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.

11.1. 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 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 with 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.

11.2. 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.)

11.3. 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.

11.3.1. Worktable grounding

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

11.3.2. Human body grounding

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

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12 Disassembly and 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 Lid assembly (When taking out disc manually)

· Disassembling the Front Panel

· Disassembling the FL P.C.B., Volume P.C.B and MIC P.C.B.

· Disassembling the DVD mechanism Unit

· Disassembling the DVD Module P.C.B

· Disassembling the Rear panel

· Disassembling the Main.P.C.B.

12.1. Disassembly Procedure

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

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12.3. Disassembling the Top

Cabinet

Step 1 Unscrew the screw.

Step 2 Lift up and remove the top cabinet.

12.4. Disassembling the Lid

assembly (When taking out disc manually)

· Follow the (Step 1) - (Step 2) of Item 12.3.

Step 1 Separates the gear for drawing out tray from the mechanism unit. It inserts a screw driver in the gear. (The gear jig)

Step 2 Insert the gear jig into the tray open/ close hole.

Step 3 Turn the gear jig counterclockwise to open the tray.

Note : Do not use force to push the tray backwards as it can

damage the mechanism unit. Turn the gear jig clockwise to return tray.

12.5. Disassembling the Front Panel

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

Step 1 Remove the lid assembly from the tray section.

Step 2 Detach FFC cables at connectors. (CN2008, CN2009)

SA-HT885WGC / SA-HT885WGS

Step 2 Unscrew the screws.

Step 3 Remove the front angle.

Step 3 Release the tabs.

Step 4 Lift up the front panel to remove it.

12.6. Disassembling the FL P.C.B., Volume P.C.B. and MIC P.C.B.

Step 4 Unscrew the screws.

12.7. Disassembling the DVD mechanism Unit

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

Step 1 Turn the gear jig clockwise to close the tray.

Step 2 Unscrew the screws.

Step 3 Detach FFC cable at connectors. (CN2004, H2000).

Step 4 Lift up the mechanism unit vertically.

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

Step 1 Remove the volume knob and mic knob.

SA-HT885WGC / SA-HT885WGS

12.9. Disassembling the Rear panel

· Follow the (Step 1) - (Step 2) of Item 12.3.

Step 1 Unscrew the screws.

Step 2 Release the tabs.

12.8. Disassembling the DVD Module P.C.B.

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

· Follow the (Step 1) - (Step 4) of Item 12.7.

Step 1 Unscrew the screws.

Step 2 Detach FFC cable at the connectors.(FP8201, FP8501)

12.10. Disassembling Main P.C.B.

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

· Follow the (Step 1) - (Step 4) of Item 12.7.

· Follow the (Step 1) - (Step 2) of Item 12.9.

Step 1 Unscrew the screws.

12.11. Service Position

12.11.1. Servicing position of the DVD Module P.C.B.

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

· Follow the (Step 1) - (Step 4) of Item 12.7.

· Follow the (Step 1) of Item 12.8.

· Follow the (Step 1) - (Step 2) of Item 12.9.

Step 1 Connect FFC cable at connector. (CN2008, CN2009)

Step 2 Turn Mechanism unit to vertically position.

SA-HT885WGC / SA-HT885WGS

12.11.2. Servicing position of the Main P.C.B.

· Follow the (Step 1) - (Step 2) of Item 12.3.

· Follow the (Step 1) - (Step 3) of Item 12.4.

· Follow the (Step 1) - (Step 4) of Item 12.5.

· Follow the (Step 1) - (Step 4) of Item 12.7.

· Follow the (Step 1) of Item 12.8.

· Follow the (Step 1) - (Step 2) of Item 12.9.

Step 1 Connect FFC cable at connector. (CN2008, CN2009)

Step 2 Turn Main P.C.B to vertically position.

SA-HT885WGC / SA-HT885WGS

13 Assembling and

disassembling the DVD mechanism Unit

13.1. Disassembly Procedure

13.2. Traverse Unit

1. Slide the lever (A) in the arrow direction (to the opposite side) till it stops.

2. Slide the lever (A) further by bending the tab at the right side of the lever A in the right direction. (The right groove opens and the boss becomes seen.)

3. Open the lever (B) to left. (The 2 grooves at the left side open.)

4. Remove the traverse unit

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