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ImageQuest G210 Technical & Service Manual

Multiscanning color monitor
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G210
Multiscanning Color Monitor
TECHNICAL SERVICE MANUAL

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Summary of Contents for ImageQuest G210

  • Page 1 G210 Multiscanning Color Monitor TECHNICAL SERVICE MANUAL...

  • Page 2: Safety Precaution

    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-Rey Radiation Precaution

    G210 Technical Service Manual X-Rey 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 0.5KV at zero beam current(minimun brightness) under a 120V AC power source.

  • Page 4: General Information

    General Information 1. Description This 21"(20" viewable) color display monitor is operated in R, G, B, drive mode input. 2. Operating instructions 2-1. External instructions 2-2. Front Power LED,Power Switch, menu key, Select Key, UP/Down Key 2-3. Rear Signal : 15 Pin D-Sub, BNC (Option) Power : 3-pole receptacle 2-4.

  • Page 5: Control Description

    G210 Technical Service Manual Control Description Front View Power Switch Power LED menu Key UP Key Down Key Select Key Video Input Signal 700m V Recommended signals are shown below. • Signal : 64 level gray scale • Video Signal Video Level : 0 to 700mV •...

  • Page 6: Timing Table

    Timing table 1024 Horizontal 1024 1280 1600 1600 1152 1280 Frequency 68.677 81.845 79.976 91.146 93.750 31.469 63.657 53.674 67.500 106.25 31.469 Period(T1) 31.778 18.631 14.561 12.219 12.504 10.971 10.677 9.412 15.709 14.815 µs 31.77 3.813 1.164 0.837 Sync Width(T2) 3.813 1.138 1.185...

  • Page 7: Video Input Terminal

    G210 Technical Service Manual Video Input Terminal A 15 Pin D-sub 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...

  • Page 8: Connecting With External Equipment

    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

    G210 Technical Service Manual Theory of Operation 1. Power Supply The AC voltage is from 90 ~ 264Vac. The conducted noise is filtered by Line filter(LP1), Coil(LP2), X and Y Capacitor(CP01,CP02,CP03.CP06). NTC1 reduces the inrush current. Bridge diode BD1 converts AC to DC.

  • Page 10: Theory Of Circuit Operation

    Theory of Circuit Operation Micro Controller System The micro controller system is composed of the MCU, the serial E PROM, key control circuit. * Refer to the Schemathics in the Page 63 (Schematic Diagram 4-2) The MCU (ICM01, WT62P1) mainly provides the following functions: 1) Detect the system input signals and send proper control signals via general purpose I/O pins.

  • Page 11: Dpms Mode

    G210 Technical Service Manual DPMS Mode The power supply supports DPMS function. Its operation is shown in the below table. V MCU H MCU MODE 205V 6.3V 130V -12V 12VA 12VB -Sync NORMAL O / O 6.3V 205V 130V -12V...
  • Page 12 High Voltage Control Circuit: High Voltage Control Circuit is working basically by using switching theory with the main component ICF01 (KA3843). Circuit operating theory is explained as following: * Refer to the Schemathics in the Page 65 (Schematic Diagram 4-4) 1) When Power ON and the Vcc DC level of pin7 of ICF01 (KA3843) exceeding 8.4V, ICF01 starts to work and the oscillate frequency is decided by RF04, CF04.
  • Page 13 G210 Technical Service Manual The Video-Power-Amplifier ICC03 is a 3-channel hybrid-IC which functions as a cascade type transistor amplifier to reach the high bandwidth performance. The Cutoff-Adjusting circuit consist of QC03, QC05, QC07, QC04, QC06 and QC08 is to provide the function of dark/background white-balance control by varying the peak voltages on the CRT cathodes.
  • Page 14 Horizontal Drive /B+ Drive circuit H/B+ Drive signal (square pulse) is generated from ICH01 pin 8/6. The H Drive signal is switching QH05. and H-drive trans amplify QH06’s base drive current. B+ Drive signal is amplified by push pull (QH02, QH03) amplifier, this amprified signal the switching B+ voltage is supplied horizontal deflection coil though coil(TH02) * Refer to the Schemathics in the Page 65 (Schematic Diagram 4-4) Brightness Blanking Reset Control CRT...

  • Page 15: Troubleshooting

    G210 Technical Service Manual Trouble Shooting Symptom Check 1. (OK Check 2. (OK Action 1) Check CP04 voltage 1) Check FP01 (short?) Change 1. No power Change 2) Check BDP01 (diode test) 3) Check input voltage Change 2) Check ICP01...
  • Page 16 Symptom Check 1. (OK Check 2. (OK Action 1) Check ICI01 video input 1) Check signal cable 1) Check video input (CRT B/D 4. No video (ICI1 #1, 3, 5/#7, 9, 11 wave form) (CNC2 #1, 3, 5 wave form) 1) Check signal cable 2) Check ICI01sync input (ICI01 #12, 24/#13, 23 wave form...

  • Page 17: Adjustment Method

    G210 Technical Service Manual Adjustment Method 1. Caution Extremely high voltage are present in the area around the FBT and the anode high voltage lead. Do not touch QF01 or its heatsink as high voltage is present on these components.
  • Page 18 4-4 Color setting Adhere color Analyzer sensor closely to CRT center. Video mode : 106kHz, 1600 mode. 1. Color Temperature 9300°K setting - Select " 9300 " by using the menu key. 1) Cut-off Setting • Video signal : Back Raster Pattern •...
  • Page 19 G210 Technical Service Manual 5. X-Ray Protection Test - In any signal input condition, short RH03 (main board) by using the JIG. - At this moment, check out whether raster disappears. - Remove the JIG. - After the power switch of the set off and on, check out proper working 6.

  • Page 20: Specification

    Specification SIZE 21"(20" viewable) Diagonal Dot Pitch 0.25 mm Non-glare Non-glare, Anti-Static Signal R.G.B Analog Input Connector 15 pin D-Type (Basic), BNC (Option) 30KHz ~ 107KHz(Automatic) SYNC 50 Hz~150 Hz(Automatic) 230 MHz(-3dB) Video Bandwidth 380X285 mm (Max. Over Scan) Display Area(HXV) Color 1600X1200 (106kHz/85Hz) Resolution...

  • Page 21: Critical Parts Specification

    G210 Technical Service Manual Critical Parts Specification TDA4841 FEATURES Concept features • Full horizontal plus vertical autosync capability • Extended horizontal frequency range from 15 to 130kHz • Comprehensive set of I C-bus driven geometry adjustments and functions, including standby mode •...
  • Page 22 EHT compensation BLOCK DIAGRAM via vertical size VCAP EHT compensation via horizontal size 22 k 1.2V VSMOD HSMOD EWDRV VREF VAGC 23 24 EW-OUTPUT EHT COMPENSATION V-SYNC INPUT VERTICAL OUT2 V-OUTPUT V-SYNC V-sync H-SIZE AND V-SIZE AND POLARITY OSCILLATOR H-PINCUSHION INTEGRATOR V-LINEARITY (TTL level)

  • Page 23: Pin Configuration

    G210 Technical Service Manual PIN CONFIGURATION Vertical sync slicer and polarity correction Vertical sync signals (TTL) applied to VSYNC (pin 14) are sliced at 1.4V. The output signal of the sync slicer is integrated on an internal capacitor to HFLB FOCUS detect and normalize the sync polarity.
  • Page 24 This can, for instance, be a range from 15.625 to 90kHz with all tolerances included. Whitout a horizontal sync signal the oscillator will be free-running at f mix . Any change of sync conditions is detected by the unternal coinidence detector. A deviation of mpre than 4% between horizontal sync and oscillator frequency will switch the horizontal section into search mode.
  • Page 25 G210 Technical Service Manual KA2142 Vcc(H) Vcc(L) FLYBACK GENERATOR DRIVE OUTPUT Vin(-) VOUTPUT STAGE STAGE Vin(+) THERMAL SHUTDOWN Table1. Pin Configurations Configurations Pin No Symbol I / O Vin ( - ) Inverting Input Vcc ( L ) Supply Voltage F .
  • Page 26 BA7657S BNC (OPTION)-BLOCK DIAGRAM Vcc2 Vcc1 (12V) (5V) LATCH Vcc1 RIN 1 220 F Vcc2 ROUT Vcc1 0.01 F RIN 2 220 F Vcc2 GOUT Vcc1 0.01 F GIN 1 Vcc1 GIN 2 Vcc2 220 F BOUT Vcc1 0.01 F BIN 1 0.15 F Sync...

  • Page 27: Block Diagram

    G210 Technical Service Manual BLOCK DIAGRAM --26--...
  • Page 28 PINNING DESCRIPTION DESCRIPTION B Input 1 V Input 2 V Output G Input 1 R Output BNC/D-SUB R Input 1 COMPOSITE SYNC OUTPUT B Input 2 G Output G Input 2 B Output H Output R Input 2 H Input 2 V Input 1 H Input 1 LM2413...

  • Page 29: Other Function

    G210 Technical Service Manual STR-F6654 BLOCK DIAGRAM START O.V.P LATCH O.S.C REG. Vth (1) O.S.C T.S.D Comp.1 O.C.P/F.B Iconst Vth(2) Comp.2 Rconst+ Rconst- Function of Terminal Terminal No. Symbols Description Functions Input of overcurrent detection signal and O.C.P/F.B Overcurrent/Feedback terminal...

  • Page 30: Pin Description

    WT62PI PIN DESCRIPTION PIN CONNECTIONS UNLOCK PURITY V-CONVERGENCE 22 ABL PWM2 PWM1 H-CONVERGENCE 23 Key-in PWM3 PWM0 24 SDA1 Reset RESET/3V3 PD5/PWM4 25 SCL1 PD4/PWM5 26 CS5 PD3/PWM6 OSC0 27 CS4 OSC0 PD2/PWM7 OSC1 28 CS3 PD1/HOUT OSC1 WT62P1-N40 SUS/Stand-by 29 CS2 PB5/SDA2 PD0/VOUT...
  • Page 31 G210 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 256x8 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 respectively.
  • Page 32 KA3842B/43B CURRENT MODE PWM CONTROLLER •OPTIMIZED FOR OFF-LINE AND DC TO DC CONVERTERS •LOW START-UP CURRENT(<1mA) • AUTOMATIC aFEED FORWARD COMPENSATION • PULSE-BY-PULSE CURRENT LIMITING • ENHANCED LOAD RESPONSE CHARACTERISTICS • DOUBLE PULSE SUPPRESSION • HIGH CURRENT TOTEM POLE OUTPUT •...
  • Page 33 G210 Technical Service Manual LM358 LM358 OUTPUT A OUTPUT B INVERTING INPUT A NON INVERTING INPUT A INVERTING INPUT B NON INVERTING INPUT B Voltage Regulator ICs Max. Package Type No. Function Vo(V) Vin(V) KIA7805P/PI OUTPUT KIA7806P/PI COMMON INPUT KIA7808P/PI...
  • Page 34 MTV021 FEATURES • Horizontal SYNC input up to 130KHz. VSSA • On-chip PLL circuitry up to 96 MHz. • Programmable horizontal resolutions up to 1524 dots ROUT per display row. • Full-screen display consists of 15(rows)by 30(columns) GOUT characters. VDDA BOUT •...

  • Page 35: Functional Block Diagram

    G210 Technical Service Manual SYMBOL FUNCTIONAL BLOCK DIAGRAM Cathode Reference Cathode Reference 1. Reference 2. Anode 2.5V ref 3. Cathode Anode Anode (A) LP SUFFIX INTERNAL SCHEMATIC CASE 29 Component values are nominal (TO-92) Power Transistor RATING SYMBOL 2SC5411 UNIT...
  • Page 36 TRANSISTORS MAX. RATINGS CE(SET) Type Package (mA) (mW) (mA) (mA) KSC945CY 0.15 TO-92 -0.3 -100 TO-92 KS733CY -150 1.5W TO-92 KSP45 -2.0 -1.5A TO-92 KSA928AY KTA200Y -500 -0.25 -100 -10-30 TO-92 KSA1013AY -160 -1.5 -500 TO-92 KSA2328AY 1.5A TO-92 KRC102M -0.3 -100 -0.88...
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  • Page 81: Exploded View

    KNOB TACT A ABS 94 HB 6215235800 KNOB POWER ABS 94 HB 6201291900 COVER FRONT PART NO. PART NAME DESCRIPION QT'Y DRAWN PLANNED CHECKED APPROVED ANGLE TITLE C.H.LEE M.H.RYU J.S.KIM SCALE EXPLODED VIEW 01.02.09 01.02.09 01.02.09 SHEET G210 SIZE DWG NO. B4210011801A...

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