Hitachi CPX1403MS Service Manual
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Hitachi CPX1403MS Service Manual

Hitachi CPX1403MS Service Manual

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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
Monitor
November 2004
No. 0423
CPX1403MS
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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  • Page 1 No. 0423 CPX1403MS 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.

  • Page 2: Table Of Contents

    SERVICE MANUAL CONTENTS : Start-up circuit ---------------------------- 25 1. Precautions --------------------------------- 3 6-2. OCP/F.B. terminal(pin 1) 1-1. Safety Precautions --------------------- 3 : Oscillator and constant voltage 1-2. Servicing Precautions ----------------- 5 control circuit -------------------------------- 27 1-3. Precautions for Electrostatically 6-3. OCP/F.B. terminal(pin 1) Sensitive Devices(ESDs) ---------------- 6 OCP circuit ---------------------------------- 29 6-4.

  • Page 3: Precautions

    1. Precautions Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards, such as electrical shock and X-rays. 1-1. Safety Precautions 1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields. 2.
  • Page 4 5. With the unit completely reassembled, plug the AC line cord directly to the power outlet. With the unit s AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including handle brackets, metal cabinets, screwheads and control shafts.

  • Page 5: Servicing Precautions

    14. Product Safety Notice Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the original-even if the replacement is rated for higher voltage, wattage, etc.

  • Page 6: Precautions For Electrostatically Sensitive Devices(Esds)

    8. Always connect a test instrument s ground lead to the instrument chassis ground before connecting the positive lead always remove the instrument s ground lead list. 1-3. Precautions for Electrostatically Sensitive Devices (ESDs) 1. Some semiconductor ("solid state") devices are easily damaged by static electricity. Such some components are called Electrostatically Sensitive Devices (ESDs) examples include integrated circuits and some field-effect transistors.

  • Page 7: Specifications

    2. Specifications MODEL : CT14KQ DESCRIPTION : 14 INCH CCTV WITH 2 CH CHMERA INPUT & HORIZONTAL RESOLUTION 450 LINES 1) SPECIFICATIONS COLOR SYSTEM : NTSC 3.58 / PAL-B POWER INPUT : AC 100-240V(50/60 Hz) POWER CONSUMPTION : 45W VIDEO IMPEDANCE : 75Ohm BNC SOUND OUTPUT : 1.0 0.2W 8 Ohm...
  • Page 8 4) LIGHTINGS INDICATOR : POWER ON (GREEN) : VIDEO 1 (GREEN) : VIDEO 2 (GREEN) : S-VIDEO (GREEN) 5) JACK & TERMINALS 4 BNC : VIDEO INPUT/OUTPUT 6 AUDIO RCA : AUDIO INPUT/OUTPUT S-VHS MINI DIN : S-VIDEO INPUT AC INLET : AC INPUT 6) ACCESSORIES WARRANTY CARD...

  • Page 9: Description Of Controls

    3. Description of controls Front View Side View Rear View 1. TINT 13. VIDEO 1 IN 2. SHARPNESS 14. VIDEO 2 IN 3. COLOR 15. VIDEO 1 OUT 4. BRIGHTNESS 16. VIDEO 2 OUT 5. CONTRAST 17. S-VIDEO 6. VOLUME 18.

  • Page 10: Alignment And Adjustments

    4. Alignment and Adjustments 4-1. Preadjustment 4-1-1. Factory Mode 1. Do not attempt these adjustments in the VIDEO mode. 2. The Factory Mode adjustments are necessary when either the EEPROM(Q002) or the CPT is replaced. 3. Do not tamper with the "Adjustment" screen of the Factory Mode menu. The screen is intended only for factory use.
  • Page 11 4-2-2. FACTORY MODE OSD ABBREVIATION INTIAL DATA REMARK (1) WHITE BALANCE R-CUTOFF Key 1 (6500 K) G-CUTOFF Key 5 B-CUTOFF Key 9 R-DRIVE Key 2 G-DRIVE Key 6 B-DRIVE Key 0 (2) WHITE BALANCE R-CUTOFF Key 1 (9300 K) G-CUTOFF Key 5 B-CUTOFF Key 9...

  • Page 12: Other Adjustments

    4-2-3. Outcondition The Outcondition Mode is used during factory inspection. Function Reset 1. System Auto 4-3. Other Adjustments 4-3-1. General Alignment Instructions 1. Usually, a color CCTV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync and focus. 2.
  • Page 13 4-3-3. High Voltage Check CAUTION There is no high voltage adjustment chassis. The B + power supply should be + 135 volts (see table 1). 1. Connect a digital voltmeter to the second anode of the picture tube. 2. Turn on the CCTV SET. Set the Brightness and Contrast controls to minimum. 3.
  • Page 14 9. Slowly move the deflection yoke forward. Adjust for the best overall green screen. 10. Temporarily tighten the deflection yoke. 11. Produce blue and red rasters by adjusting the-low-light controls. Check for good purity in each field. 12. Tighten the deflection yoke. 4-3-7.
  • Page 15 Vertical Green Belt ADJUST FIG. B-2 CENTER CONVERGENCE ADJUSTMENT BLUE BLUE BLUE BLUE/RED GREEN 4-POLE MAGINETS MOVEMENT 6-POLE MAGINETS MOVEMENT FIG. B-3 CENTER CONVERGENCE ADJUSTMENT 4-3-8. White Balance Adjustment NOTE The purpose of this procedure is to optimize the picture tube to obtain good black and white picture at all brightness levels while at the same time achieving maximum usable brightness.
  • Page 16 4-3-9. F.S. CIRCUIT CHECK THE FAIL SAFE (F.S.) CIRCUIT CHECK IS INDISPENSABLE FOR THE FINAL CHECK WHEN SERVICING. The checking should be done following the steps below 1. Turn the power switch on and adjust customer controls for normal operation. 2.

  • Page 17: Using Devices And Description

    5. Using Devices and Description. 5-1. Main Signal Processor (VDP3130Y) 5-1-1. Feature Video Decoding and Processing - four CVBS, one S-VHS input, one YCRCB component input - integrated high-quality A/D converters and associated clamp and AGC circuits - adaptive 2H comb filter Y/C separator - multi-standard color decoder PAL/NTSC/SECAM including all sub-standards - multi-standard sync decoder...
  • Page 18 5-1-2. Pinning and Description Pin No. Pin Name RIN2 PSDIP GIN2 64-pin BIN2 TEST GNDD FBLIN2 RESQ RSW2 CLK20 RSW1 HOUT SENSE XTAL 1 GNDD GNDM XTAL 2 VERTQ CIN 2/CRIN VERT CBIN GNDAF XREF SGND INTLC SVMOUT VPROT GNDAB VSUPAF SAFETY VOUT...
  • Page 19 5-1-3. Block Diagram Fig. 1-1 : Block diagram of the VDP 313xY...

  • Page 20: Vertical Output(La78040)

    5-2. Vertical Output (LA78040) 5-2-1. Feature Vertical Output, Vertical drive, Pump-up 5-2-2. Pinning and Description DESCRIPTION INVERTING INPUT PUMP UP OUT VERTICAL OUTPUT OUTPUT STAGE V NON INVERTING INPUT 5-2-3. Block Diagram...

  • Page 21: Video Output Amplifier (Tda6108Jf)

    5-3. Video Output Amplifier (TDA6108JF) 5-3-1. Feature Typical bandwidth of 9.0 MHz for an output signal of 60V (p-p) High slew rate of 1850 V s No external components required Very simple application Single supply voltage of 200V Intemal reference voltage of 2.5V Fixed gain of 51 Black-Current Stabilization (BCS) circuit Thermal protection.

  • Page 22: Audio Output Amplifier(Tda7052A)

    5-4. Audio Output Amplifoer (TDA7052A) 5-4-1. Block Diagram DC volume control Few external components Mute mode Thermal protection Short-circuit proof No switch-on and off clicks Good overall stability Low power consumption Low HF radiation ESD protected on all pins 5-4-2. Pinning and Description Pin Description Description Positive supply voltage...

  • Page 23: Power(Str-F6654)

    5-5. Power (STR-F6654) 5-5-1. Feature Small SIP full mold package Guaranteed avalanche energy : Makes it possible to simplify surge absorbing circuit Many protection functions : Pulse-by-pulse overcurrent protection Overvoltage protection with latch mode Thermal protection with latch mode 5-5-2. Pinning and Description DESCRIPTION DESCRIPTION Input of overcurrent detection signal...

  • Page 24: Audio Select Switch(Cd4066Be)

    5-6. Audio Select switch (CD4066BE) 5-6-1. Feature SIP-14 Pin Quiad Bilateral Switches Low ON resistance : 120Ω (typ.) 5-6-2. Pinning and Description DESCRIPTION DESCRIPTION Y0 IN/OUT Terminal Y2 IN/OUT Terminal Z0 IN/OUT Terminal Z2 IN/OUT Terminal Z1 IN/OUT Terminal Z3 IN/OUT Terminal Y1 IN/OUT Terminal Y3 IN/OUT Terminal E1 Enalle Input...

  • Page 25: Technical Study(Smps Operation)

    6. Technical Study (SMPS Operation) 6-1. V terminal(pin 4) : Start-up circuit The start-up circuit starts and stops the operation of the control IC by detecting the voltage appearing at the V terminal (pin 4). The power supply (V terminal input) of the control IC uses a circuit as shown in Fig.
  • Page 26 After the control circuit starts its operation, power is supplied by smoothing and rectifying the voltage of the drive winding D which is provided in the transformer. An example of the waveform of the V terminal voltage is shown in Fig. 3. The drive winding voltage does not increase to the set voltage immediately after the control circuit starts its operation.

  • Page 27: Ocp/F.b. Terminal(Pin 1) : Oscillator And Constant Voltage Control Circuit

    6-2. OCP/F.B. terminal (pin 1) : Oscillator and constant voltage control circuit. The Oscillator makes use of charging and discharging of C1 incorporated in the hybrid IC and generates pulse signals to determine the OFF-time of the MOS FET. The constant voltage control of a switch mode power supply is performed by fixing the OFF-time of the MOS FET (=50 sec.) and changing the ON-time in the PRC(Pulse Ratio Control) operation.
  • Page 28 Fig. 7 Oscillating operation at constant voltage control For the control of the output, the feedback current (FB current) flowing to a photocoupler flows across R4 and voltage drop VR4 thus caused is added to VR5. The VR5 voltage (peak value of ID) which is necessary for the inversion of the Comp.1 is controlled by VR4 (FB current) to change the height of ID peak value and VR4 controls the secondary side output (current mode control).

  • Page 29: Ocp/F.b. Terminal(Pin 1) Ocp Circuit

    6-3. OCP/F.B terminal (pin 1) OCP circuit This is a pulse-by-pulse overcurrent protection circuit which detects the peak of the peak of the drain current of the MOS FET in every pulse and reverses the oscillator output. Fig. 7 shows the overcurrent detection circuit. The MOS FET drain current is detected by inputting the voltage drop of R5 connected between the source Fig.

  • Page 30: Drive Circuit

    6-4. Drive circuit This circuit charges and discharges the capacitance between the gate and the source of the power MOS FET by receiving pulses from the oscillator. As shown in Fig.10, the basic circuit configuration is totem-pole type connection of transistors and the maximum source current is 0.2A and the maximum sink current is 0.3A.

  • Page 31: Thermal Shutdown Circuit

    6-6. Thermal shutdown circuit This circuit triggers the latch circuit when the frame temperature of the hybrid IC exceeds 140 (typ). The temperature is actually sensed by the control IC, but it also works against overheating of the MOS FET as the MOS FET and the control IC are mounted on the same lead frame. 6-7.

  • Page 32: Trouble Shooting

    7. Trouble Shooting 7-1. No Power 1) Check F801 Check voltage Please check the voltage If F801 is broken, replace between cathode of D807 is+135V it after checking this : +and-of C805 is D801, D802, D803, D804 Power input 2) Check Q801, Please check the voltage cathode of D808 is+12V Check and replace...

  • Page 33: No Raster

    7-2. No Raster Heater Voltage is OK but No Raster. Increase screen voltage by turn right screen volume Check the Appear Raster Check T461 voltage between (with Vertical + and - C281 D281 retrace line) is +180V Check Readjust screen voltage Q511, Q512, Q513 Q521, Q522, Q523...

  • Page 34: No Sound

    7-3. No Sound(Picture OK) Do the volume control in max before check this routine. Check and replace Check the signal waveform between pin5 and pin8 of Q601 W661 Check the signal waveform Check and replace to the pin 2 of Q601 Q601 Check and replace Check the signal waveform...

  • Page 35: Block Diagram

    8. Block Diagram...

  • Page 38: Parts List

    ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 39 ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 40 ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 41 ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 42 ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 43 ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST ELECTRICAL PARTS LIST P / No. P / No. P / No. P / No. ITEM No. ITEM No. ITEM No. ITEM No. ITEM ITEM ITEM ITEM NAME NAME NAME NAME P / No.
  • Page 44 THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA...
  • Page 46 Fax: +46 (0) 8 562 711 13 Tel: +39 02 38073415 Servizio Clienti Email: [email protected] Fax: +39 02 48786381/2 Email: [email protected] HITACHI EUROPE S.A.S HITACHI EUROPE LTD (Norway) AB Lyon Office STRANDVEIEN 18 B.P. 45, 69671 BRON CEDEX 1366 Lysaker FRANCE...

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