JVC TH-S55, TH-S66 Service Manual

4 (1)

SERVICE MANUAL

DVD DIGITAL CINEMA SYSTEM

TH-S55,TH-S66

	Area suffix
B ------------------------------	U.K.
E ----------	Continental Europe
EN -----------	Northern Europe
EV -------------	Eastern Europe
EE --------	Russian Federation

(SP-PWS66)

(SP-THS66F) (SP-THS66C)(SP-THS66F) (SP-THS66S)





(SP-THS55C)	(SP-THS55F)	(SP-THS55S)	(SP-PWS55)

(XV-THS55,XV-THS66)

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

No.MB365

2005/4

		SPECIFICATION
Center unit (XV-THS66/XV-THS55)

Audio section	Total Harmonic Distortion*1		0.02%

	Digital input*2		DIGITAL IN(OPTICAL) : -21 dBm to -15 dBm (660 nm ±30 nm)

Video section	Video System		PAL

	Horizontal Resolution		500 lines

	Signal-to-Noise Ratio		64 dB(Composite signal when "RGB" is selected)

	Video output level		Composite : 1.0 V(p-p)/75 Ω
			S-video-Y : 1.0 V(p-p)/75 Ω
			S-video-C : 0.3 V(p-p)/75 Ω
			Component-Y : 1.0 V(p-p)/75 Ω
			Component-PB/PR : 0.7 V(p-p)/75 Ω
			RGB : 0.7 V(p-p)/75 Ω

Tuner section	Tuning Range		FM : 87.50 MHz to 108.00 MHz

			AM (MW) : 522 kHz to 1 629 kHz

General	Power Requirements		AC 230 V , 50 Hz

	Power Consumption		17 W (at operation)
			1.3 W (in standby mode)

	Dimensions (W × H × D)		435 mm × 55 mm × 304 mm

	Mass		2.5 kg

*1: This value is measured at System cord CONNECTOR for reference.

*2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)

Subwoofer (SP-PWS66/SP-PWS55)

Amplifier section	Front	140	W per channel, RMS at 4 Ω at 1 kHz, with 10 % total harmonic distortion.

	Center/Surround	130 W per channel, RMS at 4 Ω at 1 kHz, with 10 % total harmonic distortion.

	Subwoofer	140	W, RMS at 4 Ω at 100 Hz, with 10 % total harmonic distortion.

Speaker section	Speaker unit	16 cm Bass-reflex

	Power Handling Capacity	140	W

	Impedance	4 Ω

	Frequency Range	30 Hz to 200 Hz

General	Power Requirements	AC 230 V , 50 Hz

	Power Consumption	135	W (at operation)
		0 W (in standby mode)

	Dimensions (W × H × D)	170 mm × 411 mm × 451 mm

	Mass	11.5 kg

1-2 (No.MB365)

Satellite Speakers

Front speakers (SP-THS66F)	Speaker unit			5.5 cm × 2 Bass-reflex, Magnetically Shielded

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			90 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	250 mm ×	1 104 mm ×	250 mm

	Mass			2.6 kg

Center speaker (SP-THS66C)	Speaker unit			5.5 cm × 2 Bass-reflex, Magnetically Shielded

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			90 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	320 mm ×	75 mm × 92 mm

	Mass			0.9 kg

Surround speakers (SP-THS66S)	Speaker unit			5.5 cm × 2 Bass-reflex

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			90 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	250 mm ×	1 104 mm ×	250 mm

	Mass			2.5 kg

Front speakers (SP-THS55F)	Speaker unit			8.0 cm Bass-reflex, Magnetically Shielded

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			80 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	106 mm ×	119.5 mm ×	102 mm

	Mass			0.51 kg

Center speaker (SP-THS55C)	Speaker unit			5.5 cm × 2 Bass-reflex, Magnetically Shielded

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			80 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	209 mm ×	85 mm × 92 mm

	Mass			0.85 kg

Surround speakers (SP-THS55S)	Speaker unit			8.0 cm Bass-reflex

	Power Handling Capacity			140 W

	Impedance			4 Ω

	Frequency Range			80 Hz to 20 kHz

	Dimensions (W ×	H ×	D)	111.5 mm × 148 mm ×		106.5 mm

	Mass			0.56 kg

Designs & specifications are subject to change without notice.

(No.MB365)1-3

SECTION 1 PRECAUTION

1.1Safety Precautions

(1)This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

(2)Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

(3)Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

(4)The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassembling.

(5)Leakage shock hazard testing

After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.

•Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

•Alternate check method

Plug the AC line cord directly into the AC outlet. Use an

AC voltmeter having, 1,000Ω per volt or more sensitivity in the following manner. Connect a 1,500Ω 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.

Measure the AC voltage across the resistor with the AC 1-4 (No.MB365)

voltmeter.

Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

	AC VOLTMETER
	(Having 1000
	ohms/volts,
	or more sensitivity)
0.15 F AC TYPE
	Place this
	probe on
1500 10W	each exposed
1500 10W	metal part.

Good earth ground

1.2Warning

(1)This equipment has been designed and manufactured to meet international safety standards.

(2)It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

(3)Repairs must be made in accordance with the relevant safety standards.

(4)It is essential that safety critical components are replaced by approved parts.

(5)If mains voltage selector is provided, check setting for local voltage.

1.3Caution

Burrs formed during molding may be left over on some parts of the chassis.

Therefore, pay attention to such burrs in the case of preforming repair of this system.

1.4Critical parts for safety

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer.

(This regulation dose not Except the J and C version)

1.5Safety Precautions (U.K only)

(2)Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom.

(3)Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock, fire, or other hazards.

1.5.1 Warning

(1)Service should be performed by qualified personnel only.

(2)This equipment has been designed and manufactured to meet international safety standards.

(3)It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

(4)Repairs must be made in accordance with the relevant safety standards.

(5)It is essential that safety critical components are replaced by approved parts.

(6)If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

(No.MB365)1-5

1.6Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.6.1Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed.

(1)Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

(2)Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(caption)

Anti-static wrist strap

Conductive material (conductive sheet) or iron palate

(3)Handling the optical pickup

•In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.

(Refer to the text.)

•Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

1.7Handling the traverse unit (optical pickup)

(1)Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

(2)Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

(3)Handle the flexible cable carefully as it may break when subjected to strong force.

(4)I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.8Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for the pickup unit.

•Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)

•In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire.

DVD pickup

Traverse mechanism assembly

1-6 (No.MB365)

1.9Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure.

!		Please use enough caution not to
		see the beam directly or touch it
		in case of an adjustment or operation
		check.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1

LASER PRODUCT

CAUTION : Visible and Invisible

ADVARSEL : Synlig og usynlig

VARNING

Synlig

och

laser radiation when open and

laserstråling

når maskinen

osynling

laserstrålning

när

interlock

failed or defeated.

åben eller interlocken fejeler.

den öppnas och spärren är

AVOID DIRECT EXPOSURE TO

Undgå

direkte eksponering til

urkopplad.

Betrakta

BEAM.

(e)

stråling.

(d)

strålen.

(s)

CAUTION : Visible and Invisible

VARO : Avattaessa ja suojalukitus

laser radiation when open and

ohitettuna tai viallisena olet alttiina

interlock

failed

defeated.

näkyvälle

näkymättömälle

AVOID DIRECT EXPOSURE TO

lasersäteilylle.

Vältä

säteen

BEAM.

(e)

kohdistumista suoraan itseesi. (f)

VARNING

Synlig

och

ADVARSEL : Synlig og usynlig

osynling

laserstrålning

när

laserstråling når

maskinen er

den öppnas och spärren är

åben

eller

interlocken

fejeler.

urkopplad.

Betrakta

Undgå direkte eksponering til

strålen.

(s)

stråling.

(d)

VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina näkyvälle ja näkymättömälle lasersäteilylle. Vältä säteen kohdistumista suoraan itseesi. (f)

(No.MB365)1-7

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB365)

SECTION 3

DISASSEMBLY

3.1Main body section

3.1.1Removing the metal cover (See Figs.1 to 3)

(1)From the both sides of the main body, remove the four screws A attaching the metal cover. (See Figs.1 and 2)

(2) From the back side of the main body, remove the five screws B attaching the metal cover. (See Fig.3)

(3)Lift the rear section of the metal cover upward while extending the lower sections of the metal cover. (See Fig.3)

A Metal cover

Fig.1

Metal cover A

Fig.2

Metal cover

Fig.3

(No.MB365)1-9

+ 19 hidden pages