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JVC TH-A9 Service Manual

Dvd digital theater system
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Download this manual See also: Instruction Manual
SERVICE MANUAL
DVD DIGITAL THEATER SYSTEM
SP-XSA9
SP-PWA9
Contents
Safety precautions
Important for laser products
Preventing static electricity
Dismantling and assembling
the treverse unit
Disassembly method
Discription of major IC's
COPYRIGHT
TH-A9
SP-XCA9
XV-THA9
2001 VICTOR COMPANY OF JAPAN, LTD.
AUX
FM/AM
TITLE
SUBTITLE
ZOOM
DIGEST
RETURN
ANGLE
CONTROL
SUBWOOFER
VCR
CENTER
TV
REAR-L
SLEEP
REAR-R
SETTING
TV RETURN FM MODE
SP-XSA9
PLAY
MODE
ENTER
THEATER
POSITION
TV VOL
CHANNEL
TV/VIDEO
B.SEARCH
PLAY
/REW
DOWN
TUNING
STOP
REC
MEMORY
DVD MENU
RM-STHA9J
DVD THEATER SYSTEM
Areas suffix
J ------------------------- U.S.A.
C ---------------------- Canada
1-2
1-3
1-4
1-5
1-8
1-22
TH-A9
STANDBY/ON
TV/CATV/DBS
AUDIO
VCR
DVD
DECODE
AUDIO
TIME
DISPLAY
CHOICE
SOUND
EFFECT
TEST
100+
AUDIO/
TV/VCR
CAT/DBS
DSP
MODE
VOLUME
MUTING
F.SEARCH
FF
UP
PAUSE
STROBE
No.20926
Mar. 2001

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Summary of Contents for JVC TH-A9

  • 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...

  • Page 2: Safety Precautions

    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 21 TH-A9 FL Display conversion table 1.Current FL Display Current(mA) Evalution FL Display Current(mA) Evalution FL Display Current(mA) Evalution 001c,001b 03E5 03AF,03AE 001A 03E4,03E3 03Ad 0019,0018 03E2 03Ac,03Ab 0017 03E1,03E0 03AA,03A9 0016,0015 03dF,03dE, 03A8 0014,0013 03dd 03A7,03A6 0012 03dc,03db 03A5 0011,0010...
  • Page 22 TH-A9 Discription of major IC's AK93C65AF-X(IC403) : EEPROM 1.Terminal layout 8 pin SOP 2.Block diagram DATA REGISTER R/W AMPS AUTO ERASE EEPROM INSTRUCTION REGISTER INSTRUCTION DECODE, CONTROL 4096bit 256 x 16 CLOCK ADD. DECODER GENERATION BUFFERS VPP SW VREF GENERATOR 3.Pin function...
  • Page 23 TH-A9 AN8702FH (IC101) : Frontend processor 1.Pin layout RFINN PC01 RFINP TESTSG PC02 AGCO TGBAL AGCG TBAL PEAK FBAL BOTTOM AN8702FH POFLT RFENV DTRD IDGT OFTR STANDBY DCRF VCC3 STDI RFOUT RSEL RFDIFO JLINE GND3 2. Pin function AN8702FH Pin No. Symbol I/O Function Pin No.
  • Page 24 TH-A9 HY57V161610DTC8 or KM416S1120DT-G8 (IC504,IC505) : 16MB SDRAM 1.Block diagram Clock Generator Bank B Address Bank A address buffer & Mode Refresh register counter Sense amplifier Column decoder Column & latch circuit address buffer & burst Data counter counter 2.Pin function Pin No.
  • Page 25 TH-A9 M56788FP-W(IC271) : Traverse mechanism driver 1.Pin layout REG+ CH3IN REGB OUT3 IN1+ IN3- VBS1 VBS2 IN1- OUT1 VM1- IN3+ VM1+ VM3- VM3+ VM2+ VM2- VM4+ OUT2 VM4- VM5+ IN2- VM5- IN2+ OUT5 IN5- MUTE1 MUTE2 IN5+ IN4+ SS.GND VREF...
  • Page 26 TH-A9 MC44724AVFU (IC554) : VIDEO ENCODER 1.Terminal layout 2.Block diagrams 64 ~ ChipA Y/G1Vdd Copy, Sync_ generator DVdd CVBS/Cb/B1Vdd protection DVdd C/Cr/R1Vdd CGMS, CCwss gen DVss wss gen Y/G1 Y/G1 DVss CVBS/Cb/B1 off_set DVIN[7:0] CVBS/Cb/B1 DEMAX C/Cr/R1 TP[8:1] C/Cr/R1 TVIN...
  • Page 27 TH-A9 MN102L25GHW(IC401) : UNIT CPU 1. Pin layout ADSCIRQ TRVSW ODCIRQ HMFON DECIRQ CD/DVD WAKEUP /ADPD ODCIRQ2 HAGUP ADSEP TXSEL TEST1 TEST2 TEST3 TEST4 MN102L25GHW TEST5 TEST6 TEST7 TEST8 2.Pin function Pin No. Symbol Function Pin No. Symbol Function WAIT...
  • Page 28 TH-A9 MN103S13BDA(IC301) : Optical disc controller 1. Pin layout HDD15 SBCK HDD0 HDD14 HDD1 PVDD HDD13 PVSS HDD2 OSCO1 HDD12 OSCI1 HDD3 LRCK HDD11 BLKCK HDD4 IPFLAG HDD10 DACCLK DACLRCK HDD5 DACDATA HDD9 NTRON MN103S13BDA HDD6 JMPINH HDD8 IDHOLD HDD7...
  • 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 30 TH-A9 MN67706ZY(IC201) : ADSC 1.Pin layout CHCK40 TSTSG DAT3 DAT2 SYSCLK DAT1 OFTR DAT0 33VDD 33VSS 33VSS 33VDD FBAL TBAL XRESET TGBAL AVSS ROUT CPUIRQ LOUT MN67706ZY CPUCLK AVDD CPUDTIN JLINE CPUDTOUT DBALO MONA VCOF MONB TRCRS MONC CMPIN LPFOUT...
  • Page 31 TH-A9 MSM531622F91G-X(IC402) : 1M x 16Bit/2M x 8Bit change enable ROM 1.Pin layout 3.Pin function Symbol Function NC 1 D15/A-1 Address input (For 8bit output) A0~A19 Address input D0~D15 Data output Chip enable Chip enable Output 16/8bit select BYTE L : 8bit output + H : 16bit output...
  • Page 32 TH-A9 RN5RZ33BA-X(IC1, IC102) : High cycle module 1.Terminal layout 2.Block diagram VOUT Vref Current Limit 3.Pin function Pin No. Pin name Function Ground terminal Input terminal Output terminal No connection Chip enable terminal 1-32...
  • Page 33 TH-A9 STK404-130(IC105) : Power amp 1.Terminal layout STK404-130 2.Block diagram TR1 TR2 BIAS +12V PRE-Vcc –Vcc +Vcc –OUT +OUT STK402-230(IC107) : Power amp 1. Terminal layout STK402-230 2.Block daiagram 8 +Vcc PRE+Vcc TR11 TR21 TR17 TR14 TR15 TR23 TR22 TR10...
  • 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 35 TH-A9 TC7W125FU-X(IC202) : Buffer 1.Terminal layout 2.Block diagram BA15218N(IC104,IC108,IC109,IC110) : OP AMP 1.Pin layout / Block diagram BA15218N – – +IN1 OUT2 Vcc OUT1 –IN1 VEE +IN2 –IN2 1-35...
  • 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)