JVC-THA9-ddcs-sm维修电路原理图.pdf

SERVICE MANUAL DVD DIGITAL THEATER SYSTEM No.20926 Mar. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. Printed in Japan 200103(S) TH-A9 No.20926 Safety precautions Important for laser products Preventing static electricity Dismantling and assembling the treverse unit Disassembly method Discription of major ICs 1-2 1-3 1-4 1-5 1-8 1-22 Areas suffix J - U.S.A. C - Canada Contents RM-STHA9J DVD THEATER SYSTEM DVD MENU TUNINGUPDOWN REC /REWFF PAUSE STROBEMEMORY TV/VIDEOMUTING F.SEARCHB.SEARCH PLAY CHANNELTV VOLVOLUME STOP DVD AUDIOTV/CATV/DBS STANDBY/ON VCR DECODESUBTITLETITLEAUDIO TIMEDIGESTZOOM VCR TV SLEEP SETTING TV RETURN FM MODE100+ AUDIO/ TV/VCR CAT/DBS CONTROLSUBWOOFEREFFECT CENTERTEST REAR-R ENTER PLAY MODE THEATER POSITION DSP MODE REAR-L DISPLAY CHOICEANGLERETURNSOUND FM/AMAUX SP-PWA9XV-THA9 SP-XSA9SP-XSA9SP-XCA9 VICTOR COMPANY OF JAPAN, LIMITED AUDIO FUSE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ; F901 : 1.6 A / 125 V F901 : 1.6 A / 125 V XV-THA9 C/J SEULEMENT Marquage Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ; Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.) doit etre interprete comme suit ; Note : Its means J for U.S.A. market model and C for canada market model. Importance Admistering point on the Safety (XV-THA9) TH-A9 1-7 SP-PWA9 C/J ONLY Full Fuse Replacement Marking Graphic symbol mark (This symbol means fast blow type fuse.) should be read as follows ; FUSE CAUTION FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ; F401 : 4A / 125 V F504 : 8A / 125 V F505 : 8A / 125 V SP-PWA9 C/J SEULEMENT Marquage Pour Le Remplacement Complet De Fusible PRECAUTIONS SUR LES FUSIBLES POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES DINCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ; Le symbole graphique (Ce symbole signifie fusible de type a fusion rapide.) doit etre interprete comme suit ; Note : Its means J for U.S.A. market model and C for canada market model. Importance Admistering point on the Safety (SP-PWA9) F401 : 4A / 125 V F504 : 8A / 125 V F505 : 8A / 125 V TH-A9 1-8 Remove the four screws A that retain the DVD door from the top of the unit. 1. Removing the DVD door (See Fig.1) Prior to performing the following procedure, remove the DVD door. Remove the four screws (B) that attach the left and right side covers of the unit, from the bottom panel. Remove the left and right side covers by moving each of them in the direction of the corresponding arrow. 1. 2. Removing the right and left side covers (See Fig.2) Disassembly method Fig.1 Fig.2 DVD door A A B B Right side cover Left side cover Bottom panel TH-A9 1-9 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. (Note) The mechanism slide switch for pickup protection should be set to the SHORTED position. Remove the three screws (C) that retain the front panel assembly, from the bottom panel of the unit. Remove four screws (D) that retain the DVD mechanism base, from the top of the unit. Remove the three screws (E) from the rear panel of the unit that retain the DVD mechanism base. Remove the DVD mechanism together with the front panel assembly by lifting them upward from the main unit and moving them toward the front. Disconnect the card wire of the DVD mechanism from the connector CN101 on the DVD servo board. Disconnect the wire of the LED board from the connector CN812 on the analog input/output board. Removing the front panel assembly and the DVD mechanism base (See Figs.3 to 7) 1. 2. 3. 4. 5. Remove the front panel assembly and the DVD mechanism together, just as they were assembled. C DD Bottom panel Front panel assembly DVD mechanism base Front panel assembly Front panel assembly DVD mechanism base E EE Rear panel DVD mechanism base Analog I/O board CN812 Front panel assembly DVD servo board CN101 DVD servo board CN101 DVD mechanism assembly LED board Analog I/O board CN812 Fig.3 Fig.4 Fig.5 Fig.6 Fig.7 TH-A9 1-10 (Note) (Note) (Note) Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Remove the front panel assembly and the DVD mechanism base together from the main unit. (See Figs. 3 to 7.) On the back of the DVD mechanism base, disengage the four claws at the engaging points (a) that attach the front panel assembly to the DVD mechanism base, and then pull out the front panel assembly in the direction of the arrow to separate it from the DVD mechanism base. Separating the front panel assembly and the DVD mechanism base (See Fig.8) 1. 2. It is at this stage that the front panel assembly and the DVD mechanism base are separated from each other. Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also separate the front panel assembly from the DVD mechanism base. Remove the five screws (F) that retain the display board. Removing the display board (See Fig.9) 1. Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Remove the four screws (G) from the back of the DVD mechanism base that retain the DVD mechanism cover. Remove the DVD mechanism assembly from the DVD mechanism base. Removing the DVD mechanism assembly (See Figs.10 and 11) 1. 2. This work is possible even when the front panel assembly is attached to the DVD mechanism base. Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Remove two screws (H) that retain the LED board cover, from the back of the DVD mechanism base. Remove the LED board by pulling it away from the DVD mechanism base. Removing the LED board (See Figs.10 and 11) 1. 2. This work is possible even when the front panel assembly is attached to the DVD mechanism base. Fig.8 Fig.9 Fig.10 Fig.11 DVD mechanism base Engaging points (a) Engaging points (a) Front panel assembly Display board Front panel assembly F F LED board cover HH G G DVD mechanism cover DVD mechanism assembly LED board DVD mechanism assembly TH-A9 1-11 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and DVD mechanism base. Disconnect the card wires from the connectors CN401 and CN402 on the analog board. Remove the screw (I) that retains the analog board bracket from the top of the unit. Remove the screw (J) and the screw (K) that retain the analog board from the rear panel of the unit. Disengage the analog board bracket and the gear motor assembly by moving the engaged part (b) upward. Then move the analog board in the direction of the arrow, and remove it as if pulling it out of the rear panel. Remove two screws (L) that attach the analog board to the analog board bracket. Removing the analog board (See Figs.12 to 14) 1. 2. 3. 4. 5. Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Remove the three screws (M) that retain the tuner assembly, from the rear panel of the unit. Disconnect the card wire from the connector CN1 on the tuner assembly. Removing the tuner assembly (See Figs.12 and 13) 1. 2. Fig.12 Fig.13 Fig.14 Analog board CN401 Analog board CN1 Tuner assembly I Analog board bracket Engaging point (b) Analog board CN402 Tuner assembly CN1 Analog board bracket CN402 Analog board CN401 JK M Engaging point (b) Analog board L L Analog board bracket TH-A9 1-12 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Also remove the analog board. Disconnect the wire from the connector CN106 on the analog input/output board. Remove the two screws (P) that retain the gear motor assembly and remove the assembly in the direction of the arrow. Remove the belt from the gear motor assembly. Remove two screws Q that retain the gear motor. (Note) Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Disconnect the wire from the connector CN972 on the power supply board. Remove the two screws N that retain the fan motor assembly, from the right side of the unit. Remove the two screws (O) that attach the fan motor assembly to the fan bracket. Removing the fan motor assembly (See Figs.15 and 16) 1. 2. 3. When reassembling, check that the gear motor assembly is engaged properly with the door arm assembly at the engaging points (c) and (d). Removing the gear motor assembly (See Figs.17 to 19) 1. 2. 3. 4. N Fig.15 Fig.16 Fig.17 Fig.18Fig.19 N Fan motor assembly Power supply board CN972 O O Fan motor Fan bracket Gear motor assembly Analog I/O board CN106 P Analog I/O board CN106 Gear motor assembly P P Engaging point (c) Engaging point (d) Gear motor Belt Q TH-A9 1-13 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Also remove the analog board. Also remove the gear motor assembly. Disconnect the wires from the connectors CN810 and CN811 on the analog input/output board. Remove the four screws (R) that retain the door arm assembly, from the top of the unit. Remove the two screws (S) that retain the door arm assembly, from the left and right sides of the unit. Removing the door arm assembly (See Figs.20 to 23) 1. 2. 3. R Analog I/O board CN811 Door arm assembly Analog I/O board CN810 Power supply board Door arm assembly R R S Door arm assembly S R Analog I/O board CN810 Door arm assembly Fig.20 Fig.21 Fig.22 Fig.23 TH-A9 1-14 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Also remove the analog board. Also remove the gear motor assembly. Also remove the door arm assembly. Remove the two screws (U) that retain the door arm board (L). Remove two screws (U) that retain the door arm board (R). Removing the door arm boards (L) and (R) (See Figs.24 and 25) 1. 2. Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and the DVD mechanism base. Also remove the analog board. Also remove the gear motor assembly. Also remove the door arm assembly. Remove the screw (V) that retains the power supply board, from the top of the unit. Remove three screws (W) that retain the power supply board, from the rear panel of the unit. Pull out the power supply board from clamp a. Disconnect the wire from the connector CN972 on the power supply board, and then remove the power supply board in the direction of the arrow while unplugging the connectors CN951 and CN952 from the analog input/output board. Removing the power supply board (See Figs.26 and 27) 1. 2. 3. 4. U Door arm board (L) U U U Door arm board (R) Analog I/O board Power supply board Power supply board CN972 V CN952 CN951 Power supply board CN952 CN951 W W Rear panel Fig.24 Fig.25 Fig.26 Fig.27 Clamp a Clamp a TH-A9 1-15 Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. Also remove the front panel assembly and DVD mechanism base. Also remove the analog board. Also remove the gear motor assembly. Also remove the door arm assembly. Remove the three screws (X) that retain the AV decoder board cover, from the top of the unit and remove the screw (X) that retains the analog input/output board. IF it is required to separate the AV decoder board from the analog input/output board, unplug the connectors CN501, CN502 and CN503 on the AV decoder board from the analog input/output board. Remove the four screws (Y) that retain the analog input/output board, from the rear panel of the unit. This procedure also detaches the rear panel. (Note) The analog input/output board can be removed even when it is engaged with the AV decoder board. Removing the AV decoder board and analog input/output board (See Figs.28 to 30) 1. 2. 3. X Analog I/O board X X AV decoder board cover X X X X Y Y Analog I/O board AV decoder board cover Analog I/O board CN502 CN503 CN501 AV decoder board CN101 Fig.30 Fig.29 Fig.28 TH-A9 1-16 Remove the four screws A attaching the heat sink cover. 1. Removing the heat sink cover (See Fig.1) Prior to performing the following procedure, remove the heat sink. Remove the eigth screws B attaching the amplifier assembly on the back of the body. Move the amplifier assembly backward and discon- nect the harness from connector CN109 in the lower part of the amplifier assembly. Pull out the volume knob. Remove the ten screws C attaching the heat sink cover. Remove the ten screws D and the one screw E at- taching the amplifier cover. 1. 2. 3. 4. 5. Removing the amplifier assembly and the amplifier cover (See Figs.2 and 3) Disassembly method Fig.2Fig.3 Amplifier assembly Amplifier cover Amplifier assembly Volume knob Amplifier assembly Amplifier cover Heat sink cover A A C CC C C C CC C C D D D D D E D Amplifier cover B B B Fig.1 B TH-A9 1-17 Prior to performing the following procedure, remove the heat sink cover, the amplifier assembly and the amplifier cover. Remove the two screws F attaching the preamplifier board to the bracket. Disconnect connector CN101 on the preamplifier board from the main amplifier board. Pull out the switch knob. Remove the nut and the two screws G attaching the bracket. 1. 2. 3. 4. Removing the preamplifier board (See Figs.4 to 6) Prior to performing the following procedure, remove the heat sink cover, amplifier assembly and the amplifier cover. Disconnect the wire from the connectors CN107 and CN108 on the power supply & SP terminal board. Unplug the connectors CN110 and CN111 on the power supply & SP terminal board from the main amplifier board. 1. 2. Removing the power supply & SP terminal board (See Figs.4 and 5) Fig.4 Main amplifier board Power supply & SP terminal board Preamplifier board Preamplifier board Braket Nut Switch knob Fig.5 Fig.6 Power supply & SP terminal board Main amplifier board Braket Preamplifier board F F CN108 CN107 CN101 CN111 CN110 CN108 CN107 CN101 G G TH-A9 1-18 Prior to performing the following procedure, remove the heat sink cover, amplifier assembly, the amplifier cover, the preamplifier board, the power supply & SP terminal board, the main amplifier board. Remove the four screws K attaching the power amplifier board (A) to the heat sink. Release the four joint hooks a bent a