Page 1
TH-A9 SERVICE MANUAL DVD DIGITAL THEATER SYSTEM TH-A9 STANDBY/ON TV/CATV/DBS AUDIO FM/AM TITLE SUBTITLE DECODE AUDIO ZOOM DIGEST TIME DISPLAY RETURN ANGLE CHOICE SOUND CONTROL SUBWOOFER EFFECT CENTER TEST REAR-L SLEEP REAR-R SETTING TV RETURN FM MODE 100+ SP-XSA9 SP-XCA9...
TH-A9 Safety 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.
Page 3
TH-A9 Important for Laser Products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS a LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam.
Page 4
TH-A9 Preventing 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. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Page 5
TH-A9 Dismantling and assembling the traverse unit 1. Notice regarding replacement of optical pickup 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 to the optical pickup or connected devices.
Page 6
TH-A9 Importance Admistering point on the Safety (XV-THA9) Note : It's means "J" for U.S.A. market model and "C" for canada market model. XV-THA9 C/J ONLY XV-THA9 C/J SEULEMENT Full Fuse Replacement Marking Marquage Pour Le Remplacement Complet De Fusible...
Page 7
TH-A9 Importance Admistering point on the Safety (SP-PWA9) Note : It's means "J" for U.S.A. market model and "C" for canada market model. SP-PWA9 C/J ONLY SP-PWA9 C/J SEULEMENT Full Fuse Replacement Marking Marquage Pour Le Remplacement Complet De Fusible...
Page 8
TH-A9 Disassembly method <Main unit> Removing the DVD door (See Fig.1) Remove the four screws A that retain the DVD door from the top of the unit. DVD door Fig.1 Removing the right and left side covers (See Fig.2) Right side cover Prior to performing the following procedure, remove the DVD door.
Page 9
TH-A9 Removing the front panel assembly and the DVD mechanism base Bottom panel (See Figs.3 to 7) Prior to performing the following procedure, remove the left and right side covers. Also remove the DVD door. (Note) Remove the front panel assembly and the DVD mechanism together, just as they were assembled.
Page 10
TH-A9 DVD mechanism base Separating the front panel assembly and the DVD mechanism base (See Fig.8) 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.
Page 11
TH-A9 Removing the analog board Analog board Tuner assembly CN401 (See Figs.12 to 14) Analog board 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.
Page 12
TH-A9 Removing the fan motor assembly (See Figs.15 and 16) 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.
Page 13
TH-A9 Removing the door arm assembly (See Figs.20 to 23) Door arm assembly 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.
Page 14
TH-A9 Removing the door arm boards (L) and (R) (See Figs.24 and 25) Door arm board (L) 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.
Page 15
TH-A9 Removing the AV decoder board and Analog I/O board analog input/output board (See Figs.28 to 30) 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.
Page 16
TH-A9 Disassembly method <Speaker> Amplifier Removing the heat sink cover (See Fig.1) Heat sink assembly cover Remove the four screws A attaching the heat sink cover. Volume knob Removing the amplifier assembly and the amplifier cover (See Figs.2 and 3) Prior to performing the following procedure, remove the heat sink.
Page 17
TH-A9 Removing the preamplifier board Main amplifier board (See Figs.4 to 6) Braket 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 Preamplifier board board to the bracket.
Page 18
TH-A9 Removing the Main amplifier Board Main amplifier (See Figs.7 and 8) board Prior to performing the following procedure, remove the heat sink cover, the amplifier board, the amplifier cover, the preamplifier board and the power supply & SP terminal board.
Page 19
TH-A9 Removing the power amplifier board (B) Joint c (See Figs.9 and 11) Prior to performing the following procedure, remove the heat sink cover, the amplifier assembly, the amplifier Hooks cover, the preamplifier board, the power supply & SP CN106 terminal board, the main amplifier board and power amplifier board (A).
Page 20
TH-A9 Initialization of EEPROM Make sure that no disc is present on the tray. At first push the power switch to be on. Then the door slides to the position to be able to push the stop button. After that pull AC plug out.
Page 29
TH-A9 3.Pin function Pin No. Symbol Function Pin No. Symbol Function HDD15 ATAPI data CPUDT1 System control data HDD0 ATAPI data CPUDT0 System control data HDD14 ATAPI data CLKOUT1 16.9/11.2/8.45MHz clock Power supply (3V) Power supply (3V) HDD1 ATAPI data...
Page 34
TH-A9 TC74VHC00FT-X(IC322,IC503) TC7WH74FU-X(IC321) : Clock buffer : Write timing control 1.Terminal layout 1.Pin layout /Block diagram TC7SH32FU-X(IC312) TC7SH08FU-X(IC311) : Timing control : Timing control 1.Terminal layout 1.Terminal layout IN B IN B IN A IN A OUT Y OUT Y...
Page 36
TH-A9 ZIVA3-PE0 (IC501) : AV Decoder 1. Terminal Description ZIVA3-PEO (1/5) Pin No. Symbol Function PIO0 Programmable I/O pin, which enters input mode after resetting. 8-bit, bi-directional host data bus. Write data in decoder Code FIFO via HDATA. HDATA0 The 32-bit word MSB is written first. The host reads and writes the internal register of HDATA1 the decoder and local SRAM via HDATA.
Page 37
TH-A9 ZIVA3-PEO (2/5) Pin No. Symbol Function PIO28 PIO29 Programmable I/O pins, which enter output mode after resetting. PIO30 VDD-3.3 3.3 V supply voltage for I/O signals. PIO31 Programmable I/O pin, which enters output mode after resetting. Core logic and I/O signal grounding.
Page 38
TH-A9 ZIVA3-PEO (3/5) Pin No. Symbol Function MADDR8 Memory address. MADDR10 VDD-3.3 3.3 V supply voltage for I/O signals. MADDR7 Memory address. Core logic and I/O signal grounding. MADDR0 MADDR6 Memory address. MADDR1 VDD-3.3 3.3 V supply voltage for I/O signals.
Page 39
TH-A9 ZIVA3-PEO (4/5) Pin No. Symbol Function VDD-3.3 3.3 V supply voltage for I/O signals. VDATA4 Video data bus for byte-serial CbYCrY data. In power up, the decoder does not drive VDATA. In boot-up, the decoder uses the operation configuration parameters or tri-state VDATA.
Page 40
TH-A9 ZIVA3-PEO (5/5) Pin No. Symbol Function DVD-DATA7 DVD parallel compression data from the DVD DSP. When the DVD DSP transmits a 32-bit /CDG-SCLK word, it should first describe the WSB. DVD-DATA6 CDG-SDTA: CD+G (subcode) data, which indicates a serial subcode data input.
Page 41
TH-A9 VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan Printed in Japan No.20926 200103(S)