SERVICE MANUAL DVD DIGITAL CINEMA SYSTEM MB108 2003 TH-A55 Area suffix A ------------------------- Australia TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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SPECIFICATION Center unit Audio Audio input sensitivity/Impedance (at 1 kHz), Total Harmonic Distortion 0.01 % NOTE: This value is measured at System cord CONNECTOR for reference. Analog input AUDIO IN VCR 360 mV/47 kΩ Digital input* DIGITAL IN (DBS) (OPTICAL) -21 dBm to -15 dBm (660 nm ±30 nm) * Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Video Color System...
SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
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Preventing static electricity 1.5.1 Grounding to prevent damage by 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. 1.5.2 About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
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Important for laser products (1) CLASS 1 LASER PRODUCT (5) CAUTION : If safety switches malfunction, the laser is able (2) DANGER : Invisible laser radiation when open and inter to function. lock failed or defeated. Avoid direct exposure to beam. (6) CAUTION : Use of controls, adjustments or performance of (3) CAUTION : There are no serviceable parts inside the procedures other than those specified herein may result in...
SECTION 3 DISASSEMBLY Main body section 3.1.1 Removing the top panel Top panel (See Fig.1) (1) From the top side of the main body, remove the four screws A attaching the top panel. (2) Remove the top panel from main body. Fig.1 3.1.2 Removing the rear cover (See Figs.2 and 3)
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3.1.4 Removing the front panel assembly Main board Front panel (See Figs.5 and 6) assembly • Prior to performing the following procedures, remove the top panel. (1) From the top side of the head phone board, remove the three screws G attaching the front panel assembly. (See Fig.5) CN412 (2) Disconnect the card wires from the connectors...
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3.1.6 Removing the DSP board (See Figs.9 and 10) • Prior to performing the following procedures, remove the top panel and rear cover. (1) From the top side of the DSP board, disconnect the card wires from the connectors CN401 on the DSP board.
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3.1.8 Removing the main board (See Fig.12) CN408 CN412 CN901 • Prior to performing the following procedures, remove the top CN902 panel, rear cover, rear panel, DVD mechanism, DSP board and tuner. (1) From the top side of the main board, disconnect the card wires from the connectors CN408 CN412...
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Front panel assembly section • Prior to performing the following procedures, remove the top panel and front panel assembly. 3.2.1 Removing the FL board (See Figs.1 and 2) (1) From the inside of the FL board, disconnect the wire from the connector CN502 on the volume board.
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DVD mechanism section • Prior to performing the following procedures, remove the top plate and rear cover, and remove the DVD mechanism assembly. 3.3.1 Removing the tray (See Figs.1 and 2) (1) From the left side of the DVD mechanism assembly, push Tray the slide cam in the direction of the arrow 1 and then pull out the tray in the direction of the arrow 2.
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3.3.4 Removing the clamper base Boss d Clamper base (See Fig.4) Section e (1) From the top side of the DVD mechanism assembly, re- move the four screws A attaching the clamper base. (2) Remove the clamper base from the bosses d of the loading base in an upward direction, remove the clamper base from the sections e while sliding it in the direction of the ar- row.
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3.3.6 Removing the motor DVD mechanism assembly (See Fig.6) Pulley gear • Prior to performing the following procedures, remove the clamper base and tray drive board. (1) From the top side of the DVD mechanism assembly, re- move the belt of the pulley gear. Note: Take care not to attach grease on the belt.
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3.3.8 Removing the DVD pickup unit DVD pickup unit Section h (See Figs.8 to 10) • Prior to performing the following procedures, remove the DVD Section i servo board, clamper base and DVD traverse mechanism as- sembly. (1) From the top side of the DVD traverse mechanism assem- Shaft bly, remove the screw E attaching the plate and torsion spring.
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3.3.10 Removing the spindle motor board Spindle motor board (See Figs.13 and 14) • Prior to performing the following procedures, remove the DVD Remove the solders. servo board, clamper base and DVD traverse mechanism as- sembly. (1) From the top side of the DVD traverse mechanism assem- Feed motor bly, remove the feed motor wire that is soldered to the spin- wire...
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3.3.11 Removing the feed motor Remove the solders. Spindle motor board (See Figs.15 to 17) • Prior to performing the following procedures, remove the DVD servo board, clamper base and DVD traverse mechanism as- sembly. Feed holder (1) From the top side of the DVD traverse mechanism assem- assembly bly, remove the feed motor wire that is soldered to the spin- dle motor board.
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Speaker section 3.4.1 Removing the amplifier assembly (See Figs.1 and 2) (1) From the rear side of the speaker main body, remove four screws A attaching the heat sink cover. (See Fig.1) (2) Remove the nine screws B attaching amplifier assembly. (See Fig.2) (3) Move the amplifier assembly backward and disconnect the Amplifier...
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3.4.2 Removing the rear panel (See Fig.3) • Prior to performing the following procedures, remove the am- Rear panel plifier assembly. (1) Remove the four screws C, twelve screws D and screw E attaching the rear panel. (2) Take out the rear panel from the amplifier assembly. Fig.3 3.4.3 Removing the SP terminal board (See Figs.4 and 5)
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3.4.4 Removing the mother board assembly Mother (See Fig.6) board • Prior to performing the following procedures, remove the am- plifier assembly, rear panel and SP terminal board. (1) From the top side of the amplifier assembly, disconnect the card wires from the connectors CN151 on the mother board.
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3.4.6 Removing the power amplifier board (A) P.TR holder (A) (See Figs.8 and 9) • Prior to performing the following procedures, remove the am- plifier assembly, rear panel, SP terminal board, mother board assembly and mother board. (1) Remove the three screws J attaching the heat sink to the power amplifier board (A).
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3.4.8 Removing the power transformer (See Fig.11) • Prior to performing the following procedures, remove the am- plifier assembly, rear panel, SP terminal board and mother board assembly. (1) Remove the tie band, and remove the four screws L attach- ing the power transformer.
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3.4.10 Removing the speaker (See Figs.14 and 15) Speaker (1) From right side of the speaker main body, remove the eight screws M attaching the speaker. (See Fig.14) (2) Take out the speaker from the speaker main body. (See Fig.15) (3) Disconnect the wires from the terminal of the speaker.
SECTION 4 ADJUSTMENT TEST mode (See Fig.1) (1) This model is provided with a test mode for use in production QC, service and repair. (2) Before executing the test mode, if a tray is not completely close up, make power to standby from on to close up the tray. (3) After confirm that a tray is completely close up, pull off the power plug.
SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.MB108)1-25...
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VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB108) Printed in Japan...
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SCHEMATIC DIAGRAMS DVD DIGITAL CINEMA SYSTEM TH-A55 CD-ROM No.SML200312 Area suffix A ------------------------- Australia Contents Block diagrams Standard schematic diagrams 2-14 to 19 Printed circuit boards No.MB108SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. 2003/12...
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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.
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Block diagrams <Main body section> J4402 Volume board FL board Main board Cr OUT VIDEO-MUTE1, DATA IN, Cb OUT VIDEO OUT VIDEO-MUTE2, INITIAL, IC501 (COMPONENT) Y2 OUT X501 RESET, VIDEO-Y/CMIX, IC492 IC431 KEY2 VIDEO-RGB, CLOCK DISPLAY 8MHz TV-SOUND VIDEO J4401 VIDEO-LPF MICOM Y1 OUT...
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<DVD servo section> <Subwoofer section> Speaker terminal Mother board Amplifier board (A) DVD servo board board Main board 49,50 CN406 J401 LFE,FR,FL 53,54 FCIN SL,SR,C 57 to 60 IC101 Mini Din SLIN 62,63 SRIN CONN. FRONT END P.ON PROCESSOR IC201 D3.3V D3.3V Q545...
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VICTOR COMPANY OF JAPAN, LIMITED Printed in Japan (No.MB108SCH)
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PARTS LIST [ TH-A55 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix A ----------------------------Australia - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 Speaker assembly and parts list (Subwoofer) (Block No.M2)
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Exploded view of general assmbly and parts list Block No. Power board FL board Volume board Head phone board Switch board...
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General assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local LV10787-003A FRAME LV34217-002A LENS LV42851-006A FL SCREEN LV34219-003A LIGHT LENS LV30225-0F4A SPACER LV43610-001A SPACER LV21485-003A FRONT ORNAMENT LV34213-002A PUSH BUTTON(L) LV34214-002A PUSH BUTTON(R) QYSBSF2610Z SCREW 2.6mm x 10mm(x4) LV34215-002A P BUTTON(POWER) LV34220-003A...
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Speaker assembly and parts list Block No. (Subwoofer) Amplifier board (A) Amplifier board (B) Speaker terminal board Mother board...
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Speaker(Subwoofer) Block No. [M][2][M][M] Symbol No. Part No. Part Name Description Local LV10784-010A REAR CHASSIS QYSBSF4010Z TAP SCREW M4 x 10mm(x6) 3 QQT0404-002 POWER TRANSF LV31723-001A TRANS BRACKET E406309-002 SPACER (x4) QYSDSTL4010E TAP SCREW M4 x 10mm(x4) 7 QMF51W2-3R15-J8 FUSE F101 3.15A AC250V...
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Speaker assembly and parts list Block No. (Front speaker,Center speaker,Surround speaker)
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Speaker (Front speaker,Center speaker,Surround speaker) Block No. [M][6][M][M] Symbol No. Part No. Part Name Description Local 7107850001 INSERT NUT (x5) 6500021501 SEALING MATERL (x5) 6500021511 SEALING MATERL (x5) CR077017-01 SPEAKER(FR/CT) (x3) SPEAKER(SURROU CR077018-01 (x2) 7007840801 SCREW (x20) 5300019901 BAFFLE (x5) 7007841201 SCREW...
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DVD mechanism assembly and parts list Block No. EXL-V73-1YPC 12.0mm 0.2mm 33 13 65.2mm 0.2mm Grease CFD-4007ZYZ JVG-31N PG-641 1401C...
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DVD mechanism Block No. [M][J][M][M] Symbol No. Part No. Part Name Description Local LE20520-002A MECHA BASE LE20516-002A SPINDLE BASE QYSDST2605M TAP SCREW M2.6 x 5mm(x3) LE30909-001A FEED HOLDER ASSY QAR0165-001 FEED MOTOR LV41510-001A FEED GEAR T QYSPSPU2040M SCREW M2 x 4mm(x2) LV41512-002A FEED GEAR E LV41517-003A...
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DVD loading base assembly and parts list Block No. 21 BACK SIDE FMU-DV31-1M Grease =JVG-31N =JVS-1003 BACK SIDE 3-11...
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DVD loading base Block No. [M][N][M][M] Symbol No. Part No. Part Name Description Local LV10454-007A-CK LOADING BASE QAR0164-001 MOTOR LV42087-002A MOTOR PULLEY QYSPSPU1730Z SCREW M1.7 x 3mm VKZ4777-003 MINI SCREW LV42209-001A BELT LV42084-002A PULLEY GEAR LV42085-002A MIDDLE GEAR LV42086-001A IDLE GEAR LV32514-002A SLIDE CAM...
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C904 QCZ9079-102 C CAPACITOR 1000pF AC250V M Q581 KRC102S-X DIGI TRANSISTOR C905 QCZ9079-102 C CAPACITOR 1000pF AC250V M Q951 2SC3576-JVC-T TRANSISTOR C907 QEZ0577-826 E CAPACITOR 82uF Q952 KRA104S-X DIGI TRANSISTOR C908 QCZ0136-332Z C CAPACITOR 3300pF 1kV K...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C4321 NCB30JK-105X C CAPACITOR 1uF 6.3V K R962 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J C4331 NCB30JK-105X C CAPACITOR 1uF 6.3V K R964 NRSA63J-105X MG RESISTOR 1MΩ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R4831 NRSA63J-153X MG RESISTOR 15kΩ 1/16W J PP901 QZW0038-001 WIRE CLAMP R4832 NRSA63J-223X MG RESISTOR 22kΩ 1/16W J PP902 QZW0038-001 WIRE CLAMP R4833 NRSA63J-123X MG RESISTOR...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local IC153 M62446AFP-X C459 NCB31CK-103X C CAPACITOR 0.01uF 16V K IC158 NJM4565M-WE C460 NEA71CM-476X E CAPACITOR 47uF 16V M IC159 NJM4565M-WE C461 NEA71CM-476X E CAPACITOR 47uF 16V M IC160...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C2581 NEA71HM-105X E CAPACITOR 1uF 50V M R1135 NRSA63J-332X MG RESISTOR 3.3kΩ 1/16W J C2582 NEA71CM-106X E CAPACITOR 10uF 16V M R1136 NRSA63J-332X MG RESISTOR 3.3kΩ...
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Mother board Symbol No. Part No. Part Name Description Local Block No. [0][4][0][0] C522 QETN1HM-106Z E CAPACITOR 10uF 50V M Symbol No. Part No. Part Name Description Local C523 QETN1EM-476Z E CAPACITOR 47uF 25V M C531 QETN1HM-106Z E CAPACITOR 10uF 50V M C532 QCF31HZ-103Z...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local J401 QND0118-001 DIN CONNECTOR C3206 QCSB1HK-3R3Y C CAPACITOR 3.3pF 50V K J402 QNB0162-002 SPK TERMINAL C3207 QFVF1HJ-104Z MF CAPACITOR 0.1uF 50V J J403 QNB0161-002 SPK TERMINAL...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R3112 QRE141J-512Y C RESISTOR 5.1kΩ 1/4W J Q102 KTA1001/Y/-X TRANSISTOR R3113 QRE141J-222Y C RESISTOR 2.2kΩ 1/4W J Q103 DTA144EE-X DIGI TRANSISTOR R3201 QRE141J-103Y C RESISTOR 10kΩ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C318 NCB31CK-104X C CAPACITOR 0.1uF 16V K C571 NEA70GM-476X E CAPACITOR 47uF 4V M C319 NCB31HK-102X C CAPACITOR 1000pF 50V K C572 NCB31CK-104X C CAPACITOR 0.1uF 16V K...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R258 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R738 NRSA63J-152X MG RESISTOR 1.5kΩ 1/16W J R259 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J R739 NRSA63J-0R0X MG RESISTOR 0Ω...
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DVD loading switch board Block No. [0][7][0][0] Symbol No. Part No. Part Name Description Local QGF1016F3-06 CONNECTOR FFC/FPC (1-6) QSW0910-002 SWITCH QSW0910-002 SWITCH 3-23...
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Packing materials and accessories parts list Block No. 3-24...
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Packing and accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local QAM0236-001 VIDEO CABLE QAM0381-001 SYSTEM CABLE LV43454-001A SPK CORD ASSY QAL0457-001 ANT.WIRE QAL0014-001 AM LOOP ANT RM-STHA55U REMOCON UNIT ------------ BATTERY (x2) LVT1025-009B INST BT-56012-1 WARRANTY CARD ...