Hitachi CL43WP910TAN Service Manual Download Page 46 | Manualshive

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AUDIO AMP BOARD 1 of 2

SM00026

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Summary of Contents for CL43WP910TAN

Page 1: ...ieur die Sicherheitshinweise und Hinweise zur Produktsicherheit in diesem Wartungshandbuch zu lesen SERVICE MANUAL MANUEL D ENTRETIEN WARTUNGSHANDBUCH Data contained within this Service manual is subject to alteration for improvement Les données fournies dans le présent manuel d entretien peuvent faire l objet de modifications en vue de perfectionner le produit Die in diesem Wartungshandbuch entha...

Page 2: ...te without danger of electrical shock The service technician must make sure that no protective device built into the instrument by the manufacturer has become defective or inadvertently damaged during servicing CE MARK 1 HITACHI products may contain the CE mark on the rating plate indicating that the product contains parts that have been specifically approved to provide electromagnetic compatibili...

Page 3: ...en doit s assurer qu aucun des dispositifs de protection intégrés à cet instrument par le fabricant n est défectueux ou n a été endommagé de façon accidentelle lors de l entretien LABEL CE 1 Les produits HITACHI peuvent avoir reçu le label CE qui figure sur la plaque signalétique pour indiquer que cet ensemble contient des composants qui ont fait l objet d une homologation spécifique de respect de...

Page 4: ...dass keine vom Hersteller im Gerät eingebaute Schutzvorkehrung schadhaft geworden ist oder bei der Wartung unabsichtlich beschädigt wurde CE KENNZEICHEN 1 HITACHI Produkte enthalten eventuell das CE Kennzeichen auf dem Leistungsschild welches angibt dass das Produkt Teile enthält die eigens zugelassen sind um bis zu einem spezifizierten Niveau elektromagnetische Störfreiheit zu bewirken 2 Wenn Sie...

Page 5: ...supplies power primarily to the Deflection circuit for the collector of the High Voltage generation circuit and the collector of the Deflection Output transistor Also the Convergence output amps derive their voltages from here as well The voltages produced are 130V used for Deflection and High Voltage circuits 220V used for the collectors of the R G B drivers on the CRT P W B and the Velocity Modu...

Page 6: ...01 T901 VT 33V STBY 12V SW REG 8 3V SW REG 5V SW REG 36V AUDIO FRONT TO SIGNAL BLOCK TO DEFLECTION BLOCK POWER DEFLECTION P W B POWER SUB P W B AUDIO REAR CENTER WOOFER 13V 13V SUB POWER P W B DCU HEATER 5V REG 6 3V DEF DCU SUB POWER SUPPLY I9000 T9000 RELAY FUSE LINE FILTER LINE FILTER LINE FILTER CHOKE COIL POWER SW SWITCHED 24 5V 35V SWITCHED SWITCHED SWITCHED SWITCHED STAND BY RELAY RELAY RELA...

Page 7: ...ion standard to the sound IF 5 5 to 6 5 MHz depending on the transmission standard I201 also provides AM demodulation for the L and L standards The demodulated signal appears superimposed on the Sound IF on pin 5 of I201 This signal then takes two paths The first takes it through a Low pass filter formed by R410 and C412 and coupling capacitor C411 This is then applied to pin 55 of I401 and forms ...

Page 8: ...V1 TV audio AV2 Monitor AV3 Monitor The device is I2C Controlled via pins 9 and 10 and receives a reset from the micro at power up on pin 24 The clock is provided by X401 on pins 62 and 63 The device has three supply rails 5V Digital Pin 18 5v Analogue Pin 57 and 8v Analogue Pin 39 ...

Page 9: ...3 The TDA7482 has mute control line on pin 10 This control input is high when the outputs are active and low when muted Headphone The left and right signals are output from pins 1 and 2 of the PSA1 connector and are then applied to Headphone amplifier I404 TDA2822N via the attenuation networks R473 R474 R479 R480 The TDA2822N has dual low voltage power amplifier Class D Amp TDA7482 R466 R473 R479 ...

Page 10: ...r the good convergence state to which the TV was adjusted before the misconvergence occurred This set has three mode Digital convergence data PAL NTSC Progressive PAL 100Hz Interlace So need to operate three times Adjustment and setting 1M BITS 64K BITS 8 BIT BUS REMOTE CONTROLLER EEPROM RAM CORRECTION PATTERN CPU SCREEN A D 10 BIT DATA PHOTO DETECTOR PUSH SWITCH 8000 GATES PLL ADDRESS COUNTER AVE...

Page 11: ...n screen 5 Follow repair chart for errors is error code 2 3 9 Convergence Errors Operate Initialize Check the error display 1 Darken outside light 2 Check the sensor position No Placement connection and soldering 3 Check the connector of sensor position NO 4 Is pattern hitting sensor position No 5 Adjustment check H V size centering 6 Replace sensor position No 7 Replace sensor PWB or DCU Error co...

Page 12: ...2 Procedure is shown below Press MUTE then LANG Key Initialization process is now in process Several windows will appear and error will be displayed 3 Example of error display CONNECT 1 No __ OVERFLOW No __ Sensor position No 0 2 1 7 6 4 5 3 Sensor position No viewed from front side ...

Page 13: ...ICAL OUTPUT DRIVE PARABOLA 1 I601 Q751 VERTICAL COIL OUTPUT SIDE PIN DY HORIZONTAL COIL Q777 I651 Q655 Q656 Q657 HORIZONTAL HORIZONTAL SIZE HOT PULSE GENERATOR T752 IH01 VERTICAL DYNAMIC FOCUS HI VOLTAGE QF05 QF06 IH02 PARABOLA 2 QF02 QF03 QF04 CONTROL OUTPUT QF09 QF07 HI VOLTAGE HI VOLTAGE OUTPUT STABILITY QH01 QH04 QH05 FOCUS PACK HF01 FBT HI VOLTAGE CRT TH01 ADJUSTMENT RH44 R G B Fig 4 Deflecti...

Page 14: ...ry can be adjusted by I2C control via the service menu Horizontal Synchronisation Drive Circuit The horizontal drive signal is obtained from an internal VCO which is running at a frequency of 500KHz The internal VCO is synchronised to the incoming H SYNC pulse by means of a PLL with an internal time constant The horizontal drive signal generated by means of a control loop which compares the phase ...

Page 15: ...F04 RF19 RF17 CF10 RF26 DF RF10 RF11 CF08 RF18 4 1 CPT SCREEN CPT FOCUS A B 1V or 2V A 1000 1300Vp B 450 650Vp FOCUS PACK HF01 Fig 6 Dynamic Focus Circuit The Vertical Parabola QF09 and Horizontal Parabola QF07 are sent to the FOCUS PACK and Applied to the DC Focus voltage that is adjusted by the Focus Control These voltages are then applied to the RED GREEN and BLUE Focus Electrodes of the Pictur...

Page 16: ...ty Circuit uses two linearity coils L752 G B common and L753 R The circuit is as shown below B H DY G H DY R H DY C765 C766 L752 L753 R759 R760 TO S CURVE COLLECTOR PULSE CORRECTION CAPACITOR C762 C763 Fig 7 H Linearity Circuit ...

Page 17: ...s It is capable of displaying menus and teletext for 50Hz and 100Hz televisions This device can acquire decode and display pages of teletext information in FLOF FastText and TOP only in Germany Switzerland Austria modes The device operates from a single 4MHz crystal and a 5V supply Dedicated address data lines enable it to access 4Mbytes of address space even though in this television it is access...

Page 18: ...SRAM Pin 34 VDD is the main digital supply voltage to the IC 5V 10 tolerance Pin 52 VDDA is the analogue supply voltage for the DAC s and PLL s 5V These connections are all joined together to the 5V standby rail of the television ensuring that the microcontroller operates even in the standby state Crystal Oscillator Connections Pin 11 is the 4MHz crystal oscillator input OSCIN Pin 12 is the 4MHz c...

Page 19: ...tage on this pin is changed to a value in a certain window the microcontroller will interpret it as either a volume volume volume command and or an SVHS Hi 8 connector was inserted into the Hi 8 socket Pin 38 is connected to the Programme and Menu buttons on the front panel of the TV When the voltage on this pin is changed to a value in a certain window the microcontroller will interpret it as eit...

Page 20: ...t is also pulled high to ensure that successful writing of the data has occurred e g to log fault diagnostics when the TV fails to power up and the main chassis I 2 C bus is low Scart Disable Output Pin 39 is used to disable the RS232 transmit and receive lines from pins 10 Rx and 12 Tx of scart socket 2 This is necessary when the TV is functioning normally However when the TV is in service or dia...

Page 21: ...ent picture Pin 45 is the OSD blue signal necessary for displaying BLUE colours for the OSD and Teletext Pin 46 is the OSD green signal necessary for displaying GREEN colours for the OSD and Teletext Pin 47 is the OSD red signal necessary for displaying RED colours for the OSD and Teletext CVBS Connections Pin 60 is the Composite Video signal input for VPS and WSS slicing It is normally AC coupled...

Page 22: ...t data from the MTP when operating An oscilloscope can be used to check pin 12 of the MTP to check whether the microcontroller is running correctly and accessing the MTP This pin should be oscillating at a frequency of around 2MHz and is a non periodic square waveform Data Connections Pins 13 to 15 and 17 to 21 are the 8 data lines needed to transmit a byte at a time to the microcontroller These o...

Page 23: ...onnections Pins 32 and 16 are the 5V supply and ground connections respectively This device always has 5V connected to it even when the TV is in the standby state Address Line Connections Pins 2 to 12 23 31 and 25 to 28 are the address lines needed to access the 128Kbyte of data by the microcontroller Data Line Connections Pins 13 to 15 and 17 to 21 are the 8 bit data lines needed to receive trans...

Page 24: ...s MUST be disconnected from pins 10 and 12 of scart socket 2 This line must then be inverted to prevent any connection being made EEPROM I005 The M24C32 EEPROM or E2 as it is commonly known is a 32Kbit 4Kbyte device that holds non volatile data when power is removed from the TV This device can hold information for 100 programmes such as the name frequency standard AV setting speaker language setti...

Page 25: ...evice has 5V supplied to it even when the TV is in the standby state Capacitor C048 is used to de couple the supply MSP Reset Output Connection Pin 5 is the MSP3410D reset line that is low when the MSP is being reset This line is normally HIGH 5V when the TV is operating correctly When the TV is in the standby state this line is low as there is no 5V signal supply to pull the line up through resis...

Page 26: ...e condition P BLK Output Pin 15 is the P BLK relay picture blanking High or active Low control 74HC4066 Analogue Switch I007 The 74HC4066 is a 14 pin high speed CMOS quad bilateral switch It is used primarily for connecting disconnecting signals when out of in the standby state Supply Ground Connections Pins 14 and 7 are the 5V supply and 0V ground connections respectively This device is always po...

Page 27: ...ower 8 bit CMOS data acquisition device with four analog inputs one analog output and a serial I 2 C bus interface Three address pins A0 A1 and A2 are used for programming the hardware address allowing the use of up to eight devices connected to the I 2 C bus without additional hardware Address control and data to and for the device are transferred serially via the two line bi directional I 2 C bu...

Page 28: ...E E SCL SCL SDA SDA SDA SCL OSD R AC3 MPEG DECORDER CODEC VOL TONE VOL TONE V Sync IN H Sync IN E E SUB u con ADD ADD Expanded A D D A SAV1 AV3 SW D size in SIDE PANEL WOOFER OFF Defrection uPC1885 H Sync Mute Red LED P P MENU KEYS INTER PRO E2RD ST24C32 MDSP56362 I401 U301 I201 SDA9400 SAV4 V V KEYS ON OFF Cut Off HBLK PH WSS VPS F SP OFF PAL NTSC P BLK RESET for MSP3410D R SP OFF C SP OFF MSK SW...

Page 29: ... level The time constant on the AGC system during positive modulation is rather long to avoid visible variations of the signal amplitude To improve the speed of the AGC system a circuit has been included which detects whether the AGC detector is activated every frame period When during 3 field periods no action is detected the speed of the system is increased For signals without peak white informa...

Page 30: ...nce timing Signal Path Description The I F signal is obtained from SAW filters X209 vision and X208 Sound pins 4 5 and are fed into pins 2 3 vision and 63 64 sound of I201 respectively A composite video signal is available at pin 10 from the vision demodulator Either QSS carrier or AM base band sound out from pin 5 The video is taken from pin 10 via C304 into pin 12 and out at pin 13 This is the s...

Page 31: ... line flicker reduction CTI Colour Transient Improvement sharpness vertical zoom and horizontal compression These functions arecontrolled by I2C bus This unit is powered from 5V and 8V supplies feeding into pins 1 2 and 6 of EU02 respectively The three input 50Hz video signals Y U V are sent to this unit at pins 8 10 and 12 of EU01 The Y U V video output signals double frequency video are taken fr...

Page 32: ... lines flicker RGB Processor TA 1276AN The TA1276AN is RGB Processor IC which included features are Black stretch Gamma correction Contrast Brightness Colour Tint Sharpness controls G and B drive gain control and Velocity Scan Modulation signal control The Black stretch is stable operated at each of the viewing format by input the Clamp pulse signal to pin 25 of TA1276AN from the 4 3 frame generat...

Page 33: ...ause B tube phosphor efficiency reduces in high brightness area therefore the B gain must be higher than others in high brightness area G CRT base has a bias circuit Q858 Q859 for all CRT base PCB Protection signal which is called spot is fed to CRT base to blank the picture when something has failed Scan Velocity Modulation During transmission the signal sufferers from degradation and also due to...

Page 34: ... voltage amplification and latter stages current gain applied to the auxiliary coil connectors PVMR PVMG PVMB on the neck of the cathode ray tube power CRT tocontrol the speed of the electron beam The VM circuit is located beside CRT base PCB on the backside of lower part of front cabinet The differentiated luminance signal derives from PZV pin 1 and into base of QE01 gain ...

Page 35: ...SM00026 SIGNAL PCB 1 of 4 ...

Page 36: ...SM00026 EUROPE PTV SIGNAL 2 of 4 ...

Page 37: ...SM00026 SIGNAL PCB 3 of 4 ...

Page 38: ...SM00026 EUROPE PTV SIGNAL 4 of 4 ...

Page 39: ...SM00026 UP9X DEFLECTION CIRCUIT 1 of 3 ...

Page 40: ...SM00026 UP9X DEFLECTION CIRCUIT 2 of 3 ...

Page 41: ...SM00026 UP9X DEFLECTION CIRCUIT 3 of 3 ...

Page 42: ...SM00026 UP9X SUB DEFLECTION CIRCUIT ...

Page 43: ...COMB FILTER SM00026 ...

Page 44: ...SM00026 EURO PTV CONTROL A ...

Page 45: ...EURO PTV CONTROL B SM00026 ...

Page 46: ...AUDIO AMP BOARD 1 of 2 SM00026 ...

Page 47: ...AUDIO AMP BOARD 2 of 2 SM00026 ...

Page 48: ...EUROPE PTY TERMINAL SM00026 ...

Page 49: ...UP9X SENSOR SM00026 ...

Page 50: ...UP9X RGB CIRCUIT SM00026 ...

Page 51: ...SM00026 UP91 POWER SUPPLY ...

Page 52: ...SM00026 AUDIO DECODER ...

Page 53: ...HIGH END FEATURE BOX SM00026 ...

Page 54: ...110W SUB POWER BOARD SM00026 ...

Page 55: ...SM00026 CPT CIRCUIT ...

Page 56: ...SM00026 VM CIRCUIT ...

Page 57: ...SM00026 UP9X VM PCB ...

Page 58: ...I V I F PCB SM00026 ...

Page 59: ...AUDIO AMPLIFIER BOARD SOLDER SM00026 ...

Page 60: ...AUDIO AMPLIFIER BOARD COMPONENT SM00026 ...

Page 61: ...UP9X SIGNAL SOLDER SM00026 ...

Page 62: ...UP9X SIGNAL COMPONENT SM00026 ...

Page 63: ...UP9X CPT B PCB SM00026 ...

Page 64: ...UP9X SENSOR PCB SM00026 ...

Page 65: ...110W SUB POWER PCB SM00026 ...

Page 66: ...UP9X DEFLECTION PCB SOLDER SM00026 ...

Page 67: ...UP9X DEFLECTION PCB COMPONENT SM00026 ...

Page 68: ...AUDIO DECODER SM00026 ...

Page 69: ...HIGH END FEATURE BOX PCB SM00026 ...

Page 70: ...UP9X CONTROL A PCB SM00026 ...

Page 71: ...UP9X CONTROL B PCB SM00026 ...

Page 72: ...UP9X COMB FILTER SM00026 ...

Page 73: ...UP9X SUB DEFLECTION PCB SM00026 ...

Page 74: ...UP9X TERMINAL PCB SM00026 ...

Page 75: ...THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA ...

Page 76: ...Notes ...

Page 77: ... ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 04 72 14 29 70 Fax 04 72 14 29 99 Email france consommateur hitachi eu com HITACHI EUROPE...

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