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ImageQuest F770D Technical & Service Manual

Multiscanning color monitor
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F770D (C17F05071)
Multiscanning Color Monitor
TECHNICAL SERVICE MANUAL

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Summary of Contents for ImageQuest F770D

  • Page 1 F770D (C17F05071) Multiscanning Color Monitor TECHNICAL SERVICE MANUAL...

  • Page 2: Safety Precaution

    F770D Technical Service Manual Safety Precaution WARNING Service should not be attempted by anyone unfamiliar with the necessary precautions on this monitor. The followings are the necessary precautions to be observed before servicing. 1. Always discharge the high voltage to the CRT conductive coating before handling the CRT. The picture tube is highly evacuated and if broken, glass fragments will be violently exploded.
  • Page 3 X-Ray Radiation Precaution 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must be under the specified limit. The nominal value of the high voltage of this monitor is 26KV 1.0KV at zero beam current(minimun brightness) under a 120V AC power source.
  • Page 4 F770D Technical Service Manual General Inforormation 1. Description This 17" (16" viewable) color display monitor is operated in R, G, B, drive mode input. 2. Operating instructions 2-1. Front Menu, Select,Down DPMS(Power)LED, Soft Power. 2-2. Rear Input connection AC & SIGNAL CABLE...
  • Page 5 Control Desciption Front View Power LED Power Switch Video Input Signal Recommended signals are shown below. 700mV • Video Signal Video Level : 0 to 700mV Polarty : Positive • Signal: 64 level gray scale Video Input : RGB separated •...
  • Page 6 F770D Technical Service Manual • Timing Table 1024 1024 Horizontal 31.469 43.269 50.625 46.875 53.674 63.920 60.023 68.677 Frequency µs Period(T1) 31.778 23.111 19.752 21.333 18.631 15.645 16.660 14.561 µs Sync Width(T2) 3.813 1.556 1.580 1.616 1.138 1.185 1.219 1.016 Back Porch(T3) µs...

  • Page 7: Video Input Terminal

    Video Input Terminal A 15 Pin D-sub male connector is used as the input signal connector. Pin and input signals are shown in the table below. Pin Description SIGNAL SEPERATE COMPOSITE PIN NO. SYNC SYNC GREEN GREEN BLUE BLUE DDC RETURN DDC RETURN RED GROUND RED GROUND...

  • Page 8: Connecting With External Equipment

    F770D Technical Service Manual Connecting With External Equipment Cautions Be sure to turn off the power of your computer before connecting the monitor. --7--...

  • Page 9: Theory Of Operation

    Theory of Operation 1. Power Supply The AC line voltage range is from 100V to 240V. The SMPS has +80V, +55V, -12V, +7.0V, +14V, +5V The conducted noise is filtered by X(CP01, CP04) and Y (CP02, CP03, CP11)capacitors and a common mode line filter (LP02).
  • Page 10 F770D Technical Service Manual 4. Horizontal Deflection TDA9116 is an I C autosync deflection controller for H/V sync and drive processing. All functions are controlled by I2C bus. When H-Sync is applied, the internal oscillator is automatically locked. The duty-cycle of H-output pulse Pin 8/26 is variable by frequency.

  • Page 11: Visual Characteristics

    Visual Characteristics 1. Test condition • Resolution : Any of Preset modes • Input level : 700mV • Pattern : Central White box covering 20% of the data area • Brightness Control : Default position (cut off) • Contrast Control : Adjust to 100 cd/m2 of luminance (Center of the white field) •...
  • Page 12 F770D Technical Service Manual 4. Geometric Distortion All kind of Geometric Distortion (Pincushion, Barallel, Parallelogram and Trapezoid) shall be with in 2mm boundary (to tolerance frame) Refer to belows tolerance frame. A 2mm B 2mm The tolerance frame sides are parallel to the window of enclosure axes.

  • Page 13: Power Management System

    The maximum convergence error shall be measures for a white spot of line, and represents the maximum distance between the energy centers of any two primary colors. Active Area Power Management System The automatic power management function saves electricity and reduces heat. Used in conjunction with a PC having Power Management function, or a PC running Screen Blanking software, this monitor automatically reduces its power consumption when the PC is not in use.

  • Page 14: Trouble Shooting

    F770D Technical Service Manual Trouble Shooting 1. Introduction This trouble shooting guide is arranged by fault conditions. Following each fault condition is a check for a signal on condition to be answered YES or NO. For NO answer proceed to the right and continue until the fault is located.
  • Page 15 Symptom Check(YES) Action(NO) c) Screen is black 1) Check for G2, pin4 of CRT. Check DH28, RH94, RH92, CH53, CRT but high voltage Around 500 volts? socket. G2 Wire is present. 2) Check for heater voltage at pin 6 of Check DP13, RP24, RP25, QP05, QP06 CRT.

  • Page 16: Adjustment Method

    F770D Technical Service Manual Adjustment Method 1. Caution Extremely high voltage are present in the area around the FBT(TH04) and the anode high voltage Lead. 2. Equipment Required Digital Voltmeter Frequency Counter : about 40 Hz to 100 KHz Color Analyzer...
  • Page 17 1 Color Temperature 9300°K setting - Select " 93 " by using the menu select key and adjustment up/down KEY. Back Raster Setting • Video signal : Back Raster Pattern • Adjust the brightness of back raster by rotating the adjustment up/down KEY in “Bright” •...
  • Page 18 F770D Technical Service Manual 4-6 Focus - Video Signal : " Full H " character pattern in 69kHz 1024 mode - Adjust H/V Focus VR on the top and middle of the FBT so that the image of whole screen looks clear 5.
  • Page 19 Attachment 1. Alignment Template --18--...
  • Page 20 F770D Technical Service Manual Specification SIZE 17"(16" viewable) Diagonal Dot Pitch 0.25 mm Non-glare, Anti-Static & TCO Coated Type R.G.B Analog Signal Input Cable 15 pin D-Type male Connector 30 kHz 70 kHz(Automatic) SYNC 50 Hz 150 Hz(Automatic) Video Bandwidth...

  • Page 21: Critical Parts Specification

    Critical Parts Specification MC68HC705BD7B WT62P1 GENERAL DESCRIPTION The WT62P1 is a microcontroller for digital controlled monitor with Universal Serial Bus(USB)interface. It contains an 8-bit CPU, 32k bytes flash memory, 512 bytes RAM, 14 PWMs, parallel I/Os, SYNC signal processor, time, DDC 1/2B interface, master/slave I2C interface, low speed USB device module, 6-bit A/D converter and watch-dog timer.
  • Page 22 F770D Technical Service Manual PIN CONFIGURATION 42- Pin PDIP 42- Pin SPDIP 40- Pin PDIP PWM2 PWM2 PWM1 PWM1 PWM0 PWM3 PWM0 PWM3 RESET/3V3 PD5/PWM4 RESET/3V3 PD5/PWM4 PD4/PWM5 PD4/PWM5 PD3/PWM6 PD3/PWM6 PD2/PWM7 OSCO PD2/PWM7 OSCO OSCI PD1/HOUT OSCI PD1/HOUT PB5/SDA2...
  • Page 23 KS24C08 4K 2.5V CMOS Serial EEPROMs FEATURES • Single supply with operation down to 2.5V • Low power CMOS technology - 1 mA active current typical - 10µA standby current typical at 5.5V - 5 µA standby current typical at 3.0V •...
  • Page 24 F770D Technical Service Manual DESCRIPTION The Microchip Technology Inc. 24LC04B/08B is a 4K-or 8K-bit Electrically Erasable PROM. The device is organized as two or four blocks of 256 8 bit memory with a two wire serial interface. Low voltage design permits operation down to 2.5 volts with standby and active currents of obly 5µA and 1mA respectively.
  • Page 25 UC3843 CURRENT MODE PWM CONTROLLER • OPTIMIZED FOR OFF-LINE AND DC TO DC CONVERTERS • LOW START-UP CURRENT (<1mA) • AUTOMATIC FEED FORWARD COMPENSATION • PULSE-BY-PULSE CURRENT LIMITING • ENHANCED LOAD RESPONSE CHARACTERISTICS • UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS • DOUBLE PULSE SUPPRESSION •...
  • Page 26 F770D Technical Service Manual TDA9116 MC68HC705BD7B FEATURES Dynamic correction section Output with vertical dynamic correction General waveform for dynamic corrections like focus, ADVANCED I C BUS CONTROLLED brightness uniformity, ... DEFLECTION PROCESSOR DEDICATED Fixed on screen by means of tracking system...
  • Page 27 PIN FUNCTION REFERENCE Name Function TTL compatible Horizontal / Horizontal and Vertical Sync. Input H/HVSyn VSyn TTL compatible Vertical Sync. input Horizontal PLL1 Lock datection and Vertical early Blanking composite HLckVBK output HOscF High Horizontal Oscillator sawtooth threshold level filter input HPLL2C Horizontal PLL2 loop Capacitive filter input Horizontal Oscillator Capacitor input...

  • Page 28: Thermal Protection

    F770D Technical Service Manual TDA9302H POWER AMPLIF IER FLYBACKGENERATOR THERMAL PROTECTION DESCRIPTION The TDA9302H is a monolit h ic integrated circuit in HEPTAWATT HEPTAWATT package.It is a high effi c iency (Plastic Package) powerbooster fordirectdriving ofvertical win dings of TVyokes. It is intended foruse inColor and B &...
  • Page 29 ABSOLUTE MAXIMUMRATINGS AT T = 25 Symbo l Parameter Value Unit SupplyVoltage (pin2) Flyback Peak Voltage Voltage at Pin3 Amplifier InputVoltage ± 0.5 DeflectionOutputCurrent + 1.8 Pin 3 DC Currentat V < V Total Power Dissipationat T = 90 case ±...
  • Page 30 F770D Technical Service Manual Figure 1 : DCTest Circuits. Figure 1 a : Measurementof I Figure 1 b : Measurement of V 10kW : (a) I and I ; (b) I Figure 1 c : Measurementof V Figure 1 d : Measurement of V 12k W 5.6kW...
  • Page 31 PACKAGE MECHAN ICAL DATA : 9 PINS- PLASTIC HEPTAWATT Dia. Millimeters Inches Dimensions Min. Typ. Max. Min. Typ. Max. 0.189 1.37 0.054 0.094 0.110 1.35 0.047 0.053 0.35 0.55 0.014 0.022 0.024 0.031 0.035 2.41 2.54 2.67 0.095 0.100 0.105 4.91 5.08 5.21...
  • Page 32 F770D Technical Service Manual KA2500B IIC BUS CONTROLLED R/G/B VIDEO AMPLIFIER The KA2500 is a very high frequency video amplifier system with IIC Bus controlled used in Monitor with high resolution up to 1280X1024 It contains 3 matched R/G/B video Amplifiers with OSD interface and provides a flexible interfacing to IIC Bus controlled adjustment system.
  • Page 33 MC68HC705BD7B LM358 OUTPUT A OUTPUT B INVERTING INPUT A NON INVERTING INPUT A INVERTING INPUT B NON INVERTING INPUT B Voltage Detector ICs MC68HC705BD7B Type No. Function Package Operating Voltage (V) TO - 92 KIA7019P/F CPU Reset, Low Voltage Detector 7045P/F KIA7419P/F CPU Reset, High Voltage Detector...
  • Page 34 F770D Technical Service Manual TT2062 Horizontal Deflection Output For High Resolution Display, Color TV High Speed Switching Applications • High Voltage : V CBO =1500V • Low Saturation Voltage : V CE(sat) =3V(Max.) • High Speed : tf=0.15µs(Typ.) • Collector Metal (Fin) is Fully covered with Mold Resin Maximum Ratings (Ta=25°C)
  • Page 35 MC68HC705BD7B LM2437 Simplified Schematic Diagram (One Channel) Top View General Description The LM2437 is an integrated high voltage CRT drive circuit designed for use in color monitor applications. The IC con-tains three high input impedance. wide band amplifiers which directly drive the RGB cathodes of a CRT. Each chan-nel has its gain intemally set to-14 and can drive CRT ca-pacitive loads as well as resistive loads present in other ap-plications, limited only by the package’s power dissipation.
  • Page 36 F770D Technical Service Manual MTV021 MC68HC705BD7B FEATURES • Horizontal SYNC input up to 120 KHz. • On-chip PLL circuitry up to 96MHz • Programmable horizontal resolutions up to 1524 dots per display row • Full-screen display consists of 15(rows) by 30(columns) characters.
  • Page 37 BLOCK DIAGRAM --36--...

  • Page 38: Pin Connection

    F770D Technical Service Manual PIN CONNECTION VSSA VSSA VSSA ROUT ROUT ROUT GOUT GOUT GOUT VDDA BOUT VDDA BOUT VDDA BOUT MTV021N21 HFLB FBKG HFLB FBKG HFLB FBKG MTV021N20 MTV021N24 HTONE/PWMCK HTONE/PWMCK HTONE/PWMCK VFLB VFLB VFLB PWM0 PWM 7 PWM 7...
  • Page 39 Name Descriptions PIN NO. N16 N20 N24 Open-Drain PWM D/A converter 4. The output pulse width is program- PWM4 mable by the register of Row 15, Column 27. Open-Drain PWM D/A converter 5. The output pulse width is program- PWM5 mable by the register of Row 15, Column 28.
  • Page 40 F770D Technical Service Manual TRANSISTORS MAX. RATINGS CE(SET) Type No. Package (mA) (mW) (mA) (mA) KSP45 1.5W TO-92 KTA1273Y -2.0 -2.0 -1.5 TO-92L KSA928Y -2.0A -2.0 -1.5A TO-92L -160 -1.0A 0.9W -1.5 -500 TO-92L KSA1013 0.75W TO-92 KSD1616Y -150 -0.3...

  • Page 42: Replacement Parts List

    Replacement Parts List PRODUCT SAFETY NOTICE : COMPONENTS MARKED WITH HAVE SPECIAL CHARACTERISTICS IMPORTANT TO SAFETY. RD R-CARBON CK C-CERAMIC, HK ABBREVIATIONS : RS R-METAL OXIDE CE C-ELECTROLYTIC RX R-CEMENT CC C-CERAMIC, TEMP RN R-METAL( 1%) CQ C-POLYESTER, C-POLYPROPYLENE CF C-METAL POLYESTER C-METAL POLYPROPYLENE NOTE : COMPONENTS OF THIS PARTS LIST CAN BE CHANGED FOR QUALITY IMPROVEMENT WITHOUT INFORMATION.
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