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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise" und „Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
SERVICE MANUAL
MANUEL D'ENTRETIEN
WARTUNGSHANDBUCH
COLOUR TELEVISION
DECEMBER 1999
SM00026
CL43WP910TAN
CL55WP910AN
Data
contained
within
this
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
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
Service
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Summary of Contents for Hitachi CL43WP910TAN
- Page 1 SM00026 CL43WP910TAN CL55WP910AN SERVICE MANUAL MANUEL D'ENTRETIEN WARTUNGSHANDBUCH CAUTION: Before servicing this chassis, it is important that the service technician read the “Safety Precautions” and “Product Safety Notices” in this service manual. Data contained within this Service manual is subject to alteration for improvement.
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Page 2: Safety Precautions
ALL PRODUCTS CE MARK Before any service is performed on the chassis an 1. HITACHI products may contain the CE mark on isolation transformer should be inserted between the the rating plate indicating that the product power line and the product. -
Page 3: Consignes De Securite
POUR TOUS LES PRODUITS LABEL CE Avant d’effectuer une intervention d’entretien sur le 1. Les produits HITACHI peuvent avoir reçu le label châssis, vous devez insérer un transformateur d’isolement CE qui figure sur la plaque signalétique pour indiquer entre la ligne d’alimentation électrique et le produit. - Page 4 Hochspannung sollte immer auf den festgelegten Der Gebrauch von Ersatzteilen, die nicht dieselben Wert des Gehäuses beschränkt bleiben und nicht Sicherheitsmerkmale haben wie die empfohlenen mehr. Betrieb bei höherer Spannung kann zum HITACHI Ersatzteile, wie sie in der Ersatzteilliste Versagen Bildröhre oder hoher aufgeführt sind, kann zu elektrischem Schlag, Feuer,...
- Page 5 BLOCK DIAGRAM EXPLANATION POWER SUPPLY BLOCK Normally Power Supply switching is operated as following. T901:43k–91kHz(Normal),100-125kHz(Stand by) TP91:31k-59kHz(Normal) POWER SUPPLY UTILIZED FOR THE SIGNAL AND AUDIO CIRCUITS: (POWER SUPPLY P.W.B.) The voltages produced are; +33V Stand By +12V also called A12V TV +8.3V TV +5V +36V for Audio Out circuit.
- Page 6 UP91 POWER SUPPLY BLOCK DIAGRAM POWER SW (POWER SUB P.W.B.) (POWER / DEFLECTION P.W.B.) STAND BY SWITCHED SWITCHED RELAY VT(+33V) +130 REG. LINE VIDEO FUSE +220V FILTER VM OUT 24.5V STBY 12V SW.REG. CONVERGENC +28V RELAY SWITCHING SWITCHED MAIN REGULATOR +8.3V SW.REG.
- Page 7 Audio Circuit The output from the Tuner U101 is fed via a gain and buffer stage formed by Q209 and Q210 to the SAW Filter X208. The saw filter has two separate characteristics depending on which of the two inputs (on pin 1 and 2 of the SAW Filter) the signal is applied to. Selection is achieved by the combination of Q211 and Q212.
- Page 8 The SCART outputs on I401 use the following protocol. SCART output Output signal TV audio Monitor 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 AUDIO OUTPUT The left and right signals are output from pins 1 and 2 of the PSA1 connector and are then applied to audio amplifier I402(TDA7482) and I403(TDA7482) via the attenuation networks R459 / R461 & R466 / R468. The left and right output stage consists of two TDA7482 which are Class-D amplifier which in this case is driven to give 15W per channel @ 10% thd.
- Page 10 Auto Digital Convergence (MAGIC FOCUS) System The auto digital convergence system can readjust convergence with one touch operation. The system is composed of 8 photo detectors, an A/D converter, and an optical pattern generator internal GATE ARRAY compared with conventional systems.(As shown in follow Fig.) The System can measure the dislocation of the image in each overscanned area, where 8 photo detectors are located, with respect to another.
- Page 11 Auto Digital Convergence (MAGIC FOCUS) System Convergence errors If an error message or code appears while performing MAGIC FOCUS or INITIALIZE, ([MUTE],[LANG] while Digital convergence mode ),follow this confirmation and repair method. Turn on power and input any PAL/NTSC signal. Press service switch on Deflection board.
- Page 12 Note : Error code 6 and 8 are not used . *1 Check RK42,46,50,54,58,62 resistors first. *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: Sensor position No.(viewed from front side) CONNECT 1 !
- Page 13 DEFLECTION Block Diagram of UP91 Deflection Circuit. T he operation of UP91 Deflection Circuit is as shown below. From SIGNAL P.W.B. VERTICAL HORIZONTAL SYNC SYNC VERTICAL DRIVE DEFLECTION CONTROL I702 VERTICAL HORIZONTAL VERTICAL OUTPUT DRIVE PARABOLA 1 I601 Q751 HORIZONTAL HORIZONTAL SIZE VERTICAL COIL OUTPUT...
- Page 14 SYNC Signal Processor - uPC1885A Vertical Deflection & Geometry Controls. The drive circuit for the vertical and E-W deflection circuits are generated by means of a vertical divider which gets its clock from the line oscillator. The divider is synchronised b y the incoming vertical pulse, generated by the input processor or the feature box.
- Page 15 Dynamic Focus The operation of the Dynamic Focus circuit is as shown below. 1200Vp-p C.PULSE DF07 DF08 RF35 CF18 RF15 RF21 RF14 RF22 RF25 CF11 V.PARABOLA RF13 DF15 QF09 QF05 QF07 +12V RF08 CF12 CF05 RF16 RF23 RF12 CF06 RF24 CF09 QF03 H.
- Page 16 H.Linearity The H.Linearity Circuit uses two linearity coils (L752:G,B common and L753:R). T he circuit is as shown below. B H.DY G H.DY R H.DY C765 C766 L 752 L 753 R759 R760 TO S CURVE COLLECTOR PULSE CORRECTION C APACITOR (C762, C763) Fig.
- Page 17 MicroController Section on the UP91 Chassis The main microcontroller on the UP91 chassis is located at I001 (ST92R195B). This is an 80-pin QFP (quad-flat package) that is surface mounted for compactness. This highly complex device controls many of the other integrated circuits via dedicated input/output lines or the I C bus.
- Page 18 be accessed from the EPROM/MTP (I002). These lines are also connected to I003 if an SRAM is to be fitted in future. Normally these lines will be changing state (0V to approx. +5V). By placing an oscilloscope on pin 12 of the EPROM/MTP (I002) it can be confirmed that the microcontroller is operating successfully.
- Page 19 Horizontal and Vertical Synchronisation Connections Pin 48 is the vertical synchronisation input from the deflection stage. This input is used to ensure that the OSD is displayed in a stable vertical position. When the TV is in the standby state, this input is normally low. The vertical input is triggered on the rising edge (positive polarity).
- Page 20 EEPROM Write Enable Output Pin 22 is the E2 write enable output line, which is connected to pin 7 of the EEPROM (E2). When this output is HIGH (approx. +5V), the E2 cannot be written to (write disable) but data from the device can be read. When this output is low (0V), then data can be written to the E2.
- Page 21 when the TV is powered up and normally changes state between (+5V and 0V). Pin 24 is the I C bus clock output for clocking the data to other I C peripherals/devices. The clock line is also isconnected from the main chassis when in the standby state or when writing to the EEPROM. This line oscillates at a frequency around 90KHz RS232 Connections Pin 30 is the RS232 Transmit line from the microcontroller.
- Page 22 This output is high output is high when a PTV is indicated to Horizontal center axis. HBLK-PH Output Pin 41 is used to adjust the phase of the horizontal blanking . EPROM/MTP (I002) The device located in position I002 is used to store the program code needed by the microcontroller to operate the television correctly.
- Page 23 Miscellaneous Pin 1 (VPP) is the programming voltage input pin (+12.75V needed) used to re-program the device when placed in a special programmer. This pin is always tied to the +5V standby supply, to ensure that the device can never be re-programmed inside the television chassis.
- Page 24 Supply/Ground Connections Pins 14 and 7 are the +5V and 0V supply connections respectively. This device always has +5V supplied to it, even when the TV is in the standby state. Capacitor C042 is connected across the supply terminal for de-coupling. Chip Enable Connection Pin 1 is connected to the MMU3 output from the microcontroller and is used to select either the MTP or the SRAM.
- Page 25 Address Connections Pins 1 to 3 are the address lines used to select the I C slave address of the device. On the M24C32 device, these lines must be connected to ground in order to access the device properly. Write Disable Connection Pin 7 is the I C write enable/disable input.
- Page 26 Pin 14 is the shift data input necessary for transferring the 8 data bits into the device. When this line is HIGH, a logical ‘1’ is latched into the device on the rising edge of SCK. When this line is low during the rising edge of SCK, a logical ‘0’ is stored instead.
- Page 27 Under normal operating conditions (and when the TV is NOT in service or diagnose modes), pin 10 is disconnected from pin 12 (and pin 12 of scart2). When the TV is in service mode, a PC can be connected to scart 2 to perform diagnostic functions on the chassis (see separate section on diagnostic protocols for more information).
- Page 28 Expanded A/D&D/A AV3 SW SAV1 TUNER D size in •E SIDE PANEL •E PCF8591 (I008) WOOFER OFF (U101) UVE25-EW54D Main u-con(80pin) E2P ROM E2RD E2P DIS IF/Video Chroma/Analogue SW Head Phone IN •E M.SCL M.SCL •E •E IR IN M.SDA M.SDA AV1 IN •E...
- Page 29 UP91 Signal circuit description Tuner. The tuner U101, is a frequency synthesis type with an unbalanced input, powered from the +5V rail while the tuning voltage is supplied by the +33V rail, supplied from the power supply circuit. Direct frequency access, channel selection, AGC and AFC functions are controlled via the I2C bus. AGC, AFC and Offset controls may be selected by entering the service menu and selecting the ‘tuner’...
- Page 30 Synchronisation The sync separator is operated by the Feature Box circuit. Chroma & Luma Processing The IC contains a chrominance bandpass filter , the SECAM cloche and chrominance trap. The filters are calibrated using the tuning frequency and the crystal frequency of the colour decoder. The luminance output signal which is derived from the incoming CVBS or Y/C signal can be varied in amplitude by means of a separate gain control.
- Page 31 enhancement and digital comb filtering takes place. Separated luminance and chrominance output components are available via a digital to analogue 8 bit converter at pins 1 & 4 of PN01 respectively. Digital Double Scan Conversion Unit (Feature Box) The main feature of this unit is frequency double scan conversion 100Hz interlaced and 50/60Hz progressive scan. Other features of this unit are noise reduction, line flicker reduction, CTI (Colour Transient Improvement), sharpness, vertical zoom and horizontal compression.
- Page 32 FIG.1 Scan rate conversion mode for display Fig.1 shows the differences between 100Hz interlaced scan and 50/60Hz progressive scan. The biggest advantage of progressive scan is "non-interlacing", but field frequency is kept at 50/60Hz. This means the line construction (density) is twice, compared with 100Hz interlaced scan. Therefore, if progressive scan mode is selected, large area flicker will be still appeared on display, but will eliminate lines flicker.
- Page 33 Two RGB sources are intended for use by the Digital Convergence Adjustment Signal, while the second is used for the OSD and Teletext. The required input signal has an amplitude of 0.5V Peak-to-Peak. The switching between the internal signal and the OSD signal can be realized via a OSD BLK. The circuit contains switchable matrix circuits for the colour difference signal so that the colour reproduction can be adapted for PAL/SCAM and NTSC.
- Page 34 circuit produces a compensation signal by differentiated luminance signal. The compensation signal is given some current gain,applied to the auxiliary coil (connectors PVMR, PVMG, PVMB) on the neck of the cathode ray tube (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.
- 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...
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Page 43: Comb Filter
SM00026 COMB FILTER... - Page 44 EURO PTV CONTROL - A SM00026...
- Page 45 SM00026 EURO PTV CONTROL - B...
- Page 46 SM00026 AUDIO AMP BOARD 1 of 2...
- Page 47 SM00026 AUDIO AMP BOARD 2 of 2...
- Page 48 SM00026 EUROPE PTY TERMINAL...
- Page 49 SM00026 UP9X SENSOR...
- Page 50 SM00026 UP9X RGB CIRCUIT...
- Page 51 SM00026 UP91 POWER SUPPLY...
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Page 52: Audio Decoder
SM00026 AUDIO DECODER... - Page 53 SM00026 HIGH END FEATURE BOX...
- Page 54 SM00026 110W SUB POWER BOARD...
- Page 55 SM00026 CPT CIRCUIT...
- Page 56 SM00026 VM CIRCUIT...
- Page 57 SM00026 UP9X VM PCB...
- Page 58 SM00026 I/V I/F PCB...
- Page 59 SM00026 AUDIO AMPLIFIER BOARD (SOLDER)
- Page 60 SM00026 AUDIO AMPLIFIER BOARD (COMPONENT)
- Page 61 SM00026 UP9X SIGNAL (SOLDER)
- Page 62 SM00026 UP9X SIGNAL (COMPONENT)
- Page 63 SM00026 UP9X CPT-B PCB...
- Page 64 SM00026 UP9X SENSOR PCB...
- Page 65 SM00026 110W SUB POWER PCB...
- Page 66 SM00026 UP9X DEFLECTION PCB (SOLDER)
- Page 67 SM00026 UP9X DEFLECTION PCB (COMPONENT)
- Page 68 SM00026 AUDIO DECODER...
- Page 69 SM00026 HIGH END FEATURE BOX PCB...
- Page 70 SM00026 UP9X CONTROL-A PCB...
- Page 71 SM00026 UP9X CONTROL-B PCB...
- Page 72 SM00026 UP9X COMB FILTER...
- Page 73 SM00026 UP9X SUB DEFLECTION PCB...
- Page 74 SM00026 UP9X TERMINAL PCB...
- Page 75 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
- Page 76 Notes...
- Page 77 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: csgswe@hitachi-eu.com Fax: +39 02 48786381/2 Email: customerservice.italy@hitachi-eu.com HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...