SERVICE MANUAL DVD DIGITAL THEATER SYSTEM MB075 2003 TH-M55 Area suffix J ----------------------------- U.S.A. C -------------------------- Canada SP-THM55C SP-THM55F SP-THM55F SP-THM55F SP-THM55F XV-THM55 SP-PWM55 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
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SPECIFICATION Center unit Audio section Total Harmonic Distortion 0.02% NOTE : This value is measured at System cord CONNECTOR for reference. Audio input sensitivity/ Analog input AUDIO IN (VCR) 290 mV/47 kΩ Impedance (at 1 kHz) 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 section...
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 5.CAUTION : If safety switches malfunction, the laser is 1.CLASS 1 LASER PRODUCT able to function. 2.DANGER : Invisible laser radiation when open and 6.CAUTION : Use of controls, adjustments or inter lock failed or defeated. Avoid direct exposure to performance of procedures other than those specified beam.
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Importance administering point on the safety <Main body section> Power supply board (Forward side) <SP-PWM55 subwoofer section> Speaker terminal board (Forward side) Mother board (Forward side) Caution: For continued protection against risk of fire, replace only with same type 1.6A/125V for F901, 6.3A/125V for F101, 8A/125V for F153 and F154.
SECTION 3 DISASSEMBLY Main body section Metal cover 3.1.1 Removing the metal cover (See Figs.1 to 4) (1) From the right and left sides of the main body, remove the four screws A attaching the metal cover. (See Figs.1 and (2) From the back side of the main body, remove the three screws B attaching the metal cover.
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3.1.2 Removing the front panel assembly Card wire Card wire (See Figs.5 and 6) • Remove the metal cover. CN407 (1) From the top side of the main body, disconnect the parallel Main board wires from the connectors (CN408, CN409) on the main board.
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3.1.3 Removing the DVD changer mechanism assembly DVD changer mechanism (See Fig.7) assembly Main board • Remove the metal cover. Boss d • Remove the front panel assembly. (1) From the top side of the main body, disconnect the card wires from the connectors (CN405, CN415) on the main board.
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3.1.5 Removing the audio & digital input board Main board (See Figs.9 and 10) • Remove the metal cover. CN402 Power supply board (1) From the top side of the main body, disconnect the card CN401 CN416 wire from the connector CN401 on the audio &...
3.1.8 Removing the main board Main board CN407 Parallel wire (See Figs.11 to 13) • Remove the metal cover. Card wires Parallel wire Card wire CN415 (1) From the top side of the main body, disconnect the card CN408 wires from the connectors (CN405, CN407, CN410 CN412, CN415) on the main board.
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3.1.9 Removing the connect board Phone jack board (See Fig.14) • Remove the metal cover. • Remove the front panel assembly. CN561 Connect board (1) From the inside of the front panel assembly, disconnect the card wire from the connector CN561 on the connect board.
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3.1.13 Removing the illumination board Front panel assembly (See Figs.17 and 18) (1) Open the door assembly of the front panel assembly and remove the three screws AA attaching the door cover to the door assembly. (See Fig.17.) (2) Disconnect the card wire from the connector CN551 on the illumination board.
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DVD changer mechanism assembly section 3.2.1 Removing the tray assemblies Open det lever (See Figs.1 to 5) (1) Remove the two screws A from the top cover and release the two joints a on the both sides of the DVD changer mechanism assembly.
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3.2.2 Removing the DVD servo board Short circuit points d (See Figs.6 and 7) • Prior to performing the following procedures, remove the tray assemblies. DVD pickup (1) From the topside of the DVD changer mechanism assem- bly, solder the short-circuit points d on the DVD pick up. (See Fig.6.) Caution: Solder the short-circuit points d on the DVD pickup be-...
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3.2.4 Removing the motor board (See Figs.9 and 10) (1) From the top side of the DVD chnager mechanism assem- bly, remove the two belts from the motor pulleys. (See Fig.9.) Belt Belt Caution: Take care not to attach grease on the belt. (2) Remove the four screws E attaching the motors to the chassis assembly.
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3.2.6 Removing the DVD traverse mechanism assembly DVD changer mechanism assembly (See Figs.6 and 11) DVD servo board • Prior to performing the following procedures, remove the tray assemblies. (1) From the topside of the DVD changer mechanism assem- bly, solder the short-circuit points d on the DVD pick up. (See Fig.6.) Caution: Solder the short-circuit points d on the DVD pickup be-...
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3.2.7 Removing the DVD pickup DVD traverse mechanism assembly (See Figs.12 to 14) Connector • Prior to performing the following procedures, remove the tray Flexible wire assemblies and DVD traverse mechanism assembly. (1) From topside of the DVD traverse mechanism assembly, disconnect the flexible wire from the connector on the DVD pickup.
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3.2.9 Removing the spindle motor board Card wire Motor base (See Figs.15 and 16) • Prior to performing the following procedures, remove the tray Spindle motor board assemblies and DVD traverse mechanism assembly. (1) From the topside of the DVD traverse mechanism assem- bly, remove the four screws L attaching the DVD traverse mechanism assembly to the DVD traverse mechanism base.
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3.2.11 Removing the side (L) assembly and tray switch board Side (L) assembly (See Figs.19 to 21) • Prior to performing the following procedures, remove the tray assemblies. (1) From the topside of the DVD changer mechanism assem- bly, remove the two screws S attaching the side (L) assem- bly.
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3.2.12 Removing the side (R) assembly Elevator spring (See Fig.22 to 26) • Prior to performing the following procedures, remove the tray assemblies and DVD servo board. • When removing the DVD servo board, it is not necessary to re- Elevator cam move the DVD servo board from the bracket.
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3.2.13 Removing the lifter assembly Hook (See Figs.27 to 31) • Prior to performing the following procedures, remove the tray assembies, DVD servo board, side (L) assembly and side (R) assembly. • When removing the DVD servo board, it is not necessary to re- move the DVD servo board from the bracket.
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3.2.14 Removing the rack holder assembly and sensor assembly Rack holder assembly (See Figs.32 to 38) • Prior to performing the following procedures, remove the tray Gear 1 assemblies, side (L) assembly, side (R) assembly and lifter as- sembly. Reference: If the slide gear of the DVD changer mechanism assembly places at joint ac of the rack holder assembly, turn the gear 1 counterclockwise to move the slide gear in the direction of the...
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Rack holder assembly Sensor board SV resister Sensor bracket Sensor slider Fig.37 Fig.34 Sensor assembly Sensor assembly Sensor slider Slide gear Sensor spring Slide lever Fig.35 Sensor spring Fig.38 Sensor slider Sensor spring Fig.36 (No.MB075)1-25...
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3.2.15 Taking out the disc in the play mode Tray assembly Disc (See Fig.39 to 42) Reference: Refer to "Removing the tray assemblies". (1) From the topside of the DVD mechanism assembly, re- move the top cover. (2) Unlock the tray assemblies and draw out the tray assem- blies toward the front.
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Subwoofer section Amplifier assembly 3.3.1 Removing the amplifier assembly (See Figs.1 to 3) (1) From the back side of the speaker main body, remove the four screws A attaching the heat sink cover and then re- move the heat sink cover. (See Fig.1.) (2) Remove the nine screws B attaching the amplifier assem- bly.
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3.3.3 Removing the speaker terminal board Speaker terminal board Amplifier assembly (See Figs.5 and 6) • Remove the amplifier assembly. • Remove the rear panel. (1) From the back side of the amplifier assembly, remove the two screws F attaching the AC bracket. (See Fig.5.) (2) Disconnect the wires from the connectors CN101 CN102...
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3.3.4 Removing the mother board (See Figs.7 to 9) Amplifier board (A) Amplifier board (B) • Remove the rear panel. • Remove the amplifier assembly. • Remove the speaker terminal board. (1) From the inside of the amplifier assembly, disconnect the wire from the connector CN151 on the mother board.
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3.3.5 Removing the amplifier board (A) Amplifier board (A) (See Figs.10 and 11) IC bracket • Remove the rear panel. • Remove the amplifier assembly. • Remove the speaker terminal board. • Remove the mother board. (1) Remove the three screws J attaching the IC bracket. (See Fig.10.) (2) Remove the amplifier board (A) from the heat sink together the IC bracket.
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3.3.7 Removing the power transformer Mother board Heat sink (See Figs.13 and 14) • Remove the rear panel. • Remove the amplifier assembly. • Remove the speaker terminal board. (1) Remove the tie band bundling the power cord and power transformer wire.
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3.3.8 Removing the indicator board Buffle assembly Cushioning plate,etc (See Fig.15 to 17) (1) Insert the tip of a flat-bladed screwdriver or a similar tool into the space between the speaker main body and buffle assembly (the section indicated by the arrows), and lift the buffle assembly little by little to move.
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3.3.9 Removing the speaker Speaker main body (See Figs.18 and 19) (1) Remove the four screws P attaching the speaker. (See Fig.18.) (2) Take out the speaker. (3) Disconnect the wires from the terminal of the speaker. (See Fig.19.) Speaker Fig.18 Wires Terminal...
SECTION 4 ADJUSTMENT Test mode setting method (1) Unplug the power plug. (2) Insert power plug into outlet while pressing both "STOP" key and "OPEN/CLOSE" key (for DISC 1) of the main body. (3) "Area code" is indicated at the upper left of display. (4) To release test mode, press "STANDBY/ON"...
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All-initialization method Please perform all-initialization according to the following procedures in the following case: • Just after you exchange the pick-up. • Just after you exchange the spindle motor. • Just after you exchange the traverse mechanism base. NOTE: Please perform all-initialization when you exchange the parts above and also when you remove the parts above. •...
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Display of current value of laser (1) Set the main body at test mode. (2) Press "CHOICE" key of the remote controller three times. Then, FL display is displayed "CHECK". (3) The laser current value can be switched between the value of CD and that of DVD by pressing the following key of the remote controller.
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4.7.1 Tool for adjustment *Stud: One set (four studs), Part number: JIGXVS40 4.7.2 Preparation for adjustment (1) Set the disassembly procedure, and remove the changer mechanism assembly from the main body. (2) Disconnect the card wires from the connectors CN501 CN502 on the DVD servo board.
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Confirmation of region (1) Unplug the power plug. (2) Insert power plug into outlet while pressing both "PAUSE" key and "FORWARD SKIP" key of the main body. About 3 seconds later, FL display indicates "REGION ". (3) Push the "OPEN/CLOSE" key (for DISC 1) and confirm the tray of DISC 1 is ejected. (4) To release test mode, press "STANDBY/ON"...
SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.MB075)1-39...
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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.MB075) Printed in Japan...
SCHEMATIC DIAGRAMS DVD DIGITAL THEATER SYSTEM TH-M55 CD-ROM No.SML200311 Area suffix J ----------------------------- U.S.A. C -------------------------- Canada SP-THM55C SP-THM55F SP-THM55F SP-THM55F SP-THM55F XV-THM55 SP-PWM55 Contents Block diagrams Standard schematic diagrams 2-27 to 37 Printed circuit boards No.MB075SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.
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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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VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MB075SCH)
PARTS LIST [ TH-M55 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix J ----------------------------- U.S.A. C -------------------------- Canada - 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)
Exploded view of general assembly and parts list Block No. Power su Operation board Support board Connect board Illumination board...
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Power supply board Main board 59 57 Audio & Digital input board Front board Phone jack board...
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General assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local QYSBSE3008Z SCREW 3mm x 8mm LV10769-004A FRONT PANEL LV34038-004A FL LENS LV43327-002A VOL RING QYSDSF2608Z SCREW 2.6mm x 8mm LV21451-002A BUTTON ORNAMENT LV21448-001A...
Speaker assembly and parts list Block No. (Subwoofer) Amplifier board (A) Amplifier board (B) Speaker terminal board Mother board Indicator board...
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Speaker (Subwoofer) Block No. [M][2][M][M] Symbol No. Part No. Part Name Description Local LV10784-009A REAR CHASSIS QYSBSF4010Z TAP SCREW M4 x 10mm(x6) 3 QQT0404-001 POWER TRANSF LV31723-001A TRANS BRACKET E406309-002 SPACER (x4) QYSDSTL4010E TAP SCREW M4 x 10mm(x4) F 101 ...
Speaker assembly and parts list Block No. (Front speaker) Speaker (Front speaker) Block No. [M][6][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local 9000005311 FOOT (x16) 6000198801 RATING LABEL (x4) 6400021401 BRACKET (x4)
Speaker assembly and parts list Block No. (Center speaker) Speaker (Center speaker) Block No. [M]7][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local 9000005311 FOOT (x4) 6000198811 RATING LABEL TF040013-01 SPEAKER(TW) 7001591201 SCREW...
DVD changer mechanism assembly and parts list Block No. EMU-SD1-1M Grease =JVG-31N =JVS-1003...
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DVD changer mechanism Block No. [M][K][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local QAL0478-001 PICK UP LV33983-001A PS SPRING QYSPSFT1730Z TAP SCREW M1.7 x 3mm LV10743-003A CHASSIS ASSY LV33984-001A RACK ARM LV43278-001A SENSOR SPRING...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C4191 QETN1VM-476Z E CAPACITOR 47uF 35V M R955 NRSA63J-223X MG RESISTOR 22kΩ 1/16W J C4192 NCB31HK-103X C CAPACITOR 0.01uF 50V K R960 NRSA63J-101X MG RESISTOR 100Ω...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R4801 NRSA63J-223X MG RESISTOR 22kΩ 1/16W J EP401 QNZ0136-001Z EARTH PLATE R4802 NRSA63J-223X MG RESISTOR 22kΩ 1/16W J EP402 QNZ0136-001Z EARTH PLATE ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local CN551 QGF1006F1-04W CONNECTOR FFC/FPC (1-4) D401 MA152WK-X SI DIODE CN561 QGF1006F1-04W CONNECTOR FFC/FPC (1-4) D403 MA152WK-X SI DIODE DI501 QLF0119-001 FL TUBE D405 MA152WK-X SI DIODE...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C1201 NEA71EM-475X E CAPACITOR 4.7uF 25V M C2600 NCF31CZ-104X C CAPACITOR 0.1uF 16V Z C1202 NEA71EM-475X E CAPACITOR 4.7uF 25V M C2601 NEA71EM-475X E CAPACITOR 4.7uF 25V M...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R1137 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J R2566 NRSA63J-392X MG RESISTOR 3.9kΩ 1/16W J R1138 NRSA63J-104X MG RESISTOR 100kΩ 1/16W J R2567 NRSA63J-103X MG RESISTOR 10kΩ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local D503 MTZJ5.1C-T2 Z DIODE R537 QRE141J-472Y C RESISTOR 4.7kΩ 1/4W J D504 1SS133-T2 DIODE R538 QRE141J-472Y C RESISTOR 4.7kΩ 1/4W J D505 1SS133-T2 DIODE R539...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local D2502 MTZJ13C-T2 Z DIODE R2202 QRE141J-471Y C RESISTOR 470Ω 1/4W J D3101 1SS133-T2 DIODE R2203 QRE141J-563Y C RESISTOR 56kΩ 1/4W J D3201 1SS133-T2 DIODE R2204...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R3505 QRE141J-333Y C RESISTOR 33kΩ 1/4W J DVD on a chip IC501 or NDV8601VWA-BE processor R3506 QRZ9006-4R7X F.RESISTOR 4.7Ω 1/4W J IC505 K4S643232F-TC60 ...
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Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C319 NCB31HK-102X C CAPACITOR 1000pF 50V K C540 NCF31CZ-104X C CAPACITOR 0.1uF 16V Z C320 NCB31HK-102X C CAPACITOR 1000pF 50V K C541 NCF31CZ-104X C CAPACITOR 0.1uF 16V Z...
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Symbol No. Part No. Part Name Description Local R307 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J R308 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J R309 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J R313 NRSA63J-473X MG RESISTOR 47kΩ 1/16W J R317 NRSA63J-473X MG RESISTOR 47kΩ...
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Packing materials and accessories parts list Block No. P21 P17 A1, A2, A3, A12 3-22...
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Packing and accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local LVT1024-002B INST BOOK ENG,FRE THM55C LVT1024-001B INST BOOK THM55J YU20333 SAFETY INST. BT-51034-1 J=REGIST CARD THM55J QAM0381-001 SYSTEM CABLE QAM0236-001 VIDEO CABLE LV43454-001A SPK CORD ASSY ...