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Sony TRINITRON 17VC Operation Manual
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Sony TRINITRON 17VC Operation Manual

Sony TRINITRON 17VC Operation Manual

Color computer display
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OPERATION MANUAL
TROUBLESHOOTING MANUAL
9-978-878-02

TABLE OF CONTENTS

D Board (Deflection Section) .................... 11
A Board ................................................... 21
U Board ................................................... 24
GENERAL TROUBLESHOOTING ................ 26
PARTS LEVEL BOARD REPAIR ................. 37
TRINITRON
17VC
COLOR COMPUTER DISPLAY
®
-
-
1
CHASSIS
REVISED

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Summary of Contents for Sony TRINITRON 17VC

  • Page 1: Table Of Contents

    17VC CHASSIS OPERATION MANUAL REVISED TROUBLESHOOTING MANUAL TABLE OF CONTENTS CIRCUIT DESCRIPTION D Board (Power Supply Section) ....2 D Board (Deflection Section) ....11 A Board ........... 21 U Board ........... 24 GENERAL TROUBLESHOOTING ....26 PARTS LEVEL BOARD REPAIR ....37 TRINITRON COLOR COMPUTER DISPLAY ®...

  • Page 2: Circuit Description

    CIRCUIT DESCRIPTION D BOARD POWER SUPPLY SECTION Power Supply Electrical Circuit Operation Modes Secondary Circuitry AC Input Protection Circuits Degauss Circuit Troubleshooting Primary Circuitry USB/Audio Power Circuit Operation Modes Mode Syncs Condition Power Switch Off Active Off No H and/or V Low Power, Heater Off Amber Active On...
  • Page 3 AC Input and Degauss 1. AC Input Section EMI Filter Degauss Circuit 2. Primary Circuitry Section IC601 Pin 1 Vin: Pin 2 – HVS: Pin 3 Pin 4 – Driver:...
  • Page 4 Pin 5 – Isense: Pin 6 – Vaux: Pin 7 – DS: Pin 8 – Iref: Pin 9 – Vctrl: Pin 10 – NC: Pin 11 – Gnd: Pin 12 – NC: Pin 13 – Dem: Pin 14 – OOB: Operation 3.
  • Page 5 +5/12 Volt Regulator +5V Standby Circuit Heater Voltage Regulator Feedback Circuit Active On Mode Feedback...
  • Page 6 Feedback Circuits Active Off Mode Feedback...
  • Page 7 Protection Circuits 4. Protection Circuits OVP and UVLO Secondary Short Circuits 5. Troubleshooting Warning...
  • Page 8 Caution: C610 has a Slow Voltage Discharge Caution: Do NOT Touch IC610 Component Tab or Heat Sink No Power AC Input and Degauss Circuit Trouble Shooting Primary Section IC601 Q602 Secondary Circuit...
  • Page 9 Rectifier Section +5/12 Volt Regulator Standby 5V Circuit Heater Voltage Regulator Feedback Circuit Protection Circuits 6. USB/Audio Power Circuit CAUTION: Do not touch IC610 component tab or heat sink.

  • Page 11: D Board Deflection Section

    USB/Audio Power Circuit To SW 602 D BOARD DEFLECTION SECTION 1. Horizontal Deflection Circuit Overview H Drive, H Out, Feedback H Size/Shape control...
  • Page 12 V.DF...
  • Page 13 V.DF...
  • Page 14 Troubleshooting No H Deflection / No Power Bad Distortion 2. H Linearity and Raster/Distortion Ringing Correction Circuit HLC Balance Control and HLC Damping S-Cap switching and S-cap Damping Troubleshooting Bad Linearity Bad Top Distortion/ Left side Raster Ringing 3. H. Raster Centering Circuit Overview H Center Circuit Troubleshooting...
  • Page 15 Rotation/Vertical Key Circuit STBY R558 +15V #1, 2 PIN IC502 R559 Rotation Coil (CN701) R563 R560 V+ + ROTATION C549 C547 R562 IC901 R566 C513 -15V 4. Rotation Circuit No Rotation Control 5. Dynamic Focus Circuit Overview H DF V DF Troubleshooting Bad H DF Bad V DF...
  • Page 16 V.DF...
  • Page 17 6. High Voltage Protect Circuit High Voltage Regulation and Output Circuit G1 Voltage (-33Vdc) HV Protect Circuit HV Protect circuit will be activated by the Microprocessor when the signal at HV DET, Microprocessor pins#18 reaches a +5vdc level. HV DET indicates the level of the primary current developed by the 270V winding of the FBT through R543, Beam Current Protect Troubleshooting Hints No HV / No Power...
  • Page 20 G1, Heater and Focus Voltages from D Board RGB Cathode Drv Video Front Input Process D/A Conv D/A Level Cutoff I 2 C Communication Voltage G2 Voltage H and V Retrace OSD Generation Cutoff From 17VC Chassis A Board Block Diagram 7.
  • Page 21 Video Select and RGB Process Functions +80V +12V +12V IC002 IC001 16,22,29 D104 C106 C206 Video Input (0.7Vpp) C306 C Data C CLK D105 CBLK Cutoff BPCLP Control D106 R_OSD D206 B_OSD B_OSD D306 OSD_BLK +12V IC004 Troubleshooting Hints Vertical Scan Failure VIDEO "A"...
  • Page 22 Block Diagram IC003 OSD HORD DISPLAY VERD MEMORY OSD_EN SHADOW CONTROL BSEN REGISTERS X32B VPOL DATA DATA HPOL SDA(MOSI) and DATA RECEIVER SCL(SCK) MANAGEMENT WADDR MBUS/SPI WCOLOUR ADDRC CONTROL RDATA MCLK BUS ARBITRATION CCOLOURS LOGIC and SELECT BUFFER NROW VPOL CRADDR VFLB VERTICAL...
  • Page 23 1. RGB Signal Processing (A Board) RGB Signal Amplifiers RGB video signals are amplified by IC001. Here the individual Sub Contrasts, Brightness offsets, and Contrast gain levels are set by the Microprocessor via I2 C control. The OSD RGB video signals from IC003 are mixed into the main video channels inside IC001.
  • Page 24 capability. This is written into the memory of IC906. The DDC compatible host computer reads the EDID using pins 12 and 15 of the VGA connector (see the table below regarding the contents of EDID and the VGA connector). DDC2Bi allows the display to communicate more detailed data to the graphic host computer. IC901 is a micro-controller, which contains DDC2Bi and I C bus serial communication capability.

  • Page 25: A Board

    System Block Diagram IN VIDEO RGB VIDEO VIDEO BLOCK FOCUS/G2/G1 HEATER HEATER A-BOARD DC POWER MAIN POWER SW Sync C-BUS STATIC/ -33V FOCUS DYNAMIC BLOCK Deflection FOCUS POWER SUPPLY PS Mode D.CONV DEF. USER H & V IN SYNC CONT DEFLECTION DISPLAY DATA COMM BUS TILT...

  • Page 26: General Troubleshooting

    GENERAL TROUBLESHOOTING Input crosshatch from generator No Picture Missing Color or Abnormal Color Visible Retrace or Visible Raster Mis-convergence Poor Focus Unsynchronized Image Abnormal Geometry Abnormal Image Size Shutdown No Communication See Manager Other Trouble...
  • Page 27 NO PICTURE Is amber power LED blinking? amber LED Check the video cable connection green power LED Press power switch; if LED does not turn on, repair power supply (I) Does A-Board make proper Press A Board carefully contact with to make proper contact with CRT gun? CRT gun...
  • Page 28 MISSING COLOR proper video Check signal levels present generator & on CN302 pins cable 2, 4 & 6? proper AC voltages present on all cathodes? (See Parts Level Board Repair Section) Check IC004, proper DC IC001 pins 3, voltages present 4, 5 and +B on all voltage...
  • Page 29 VISIBLE RETRACE Check white balance adjustment Check CN301 G2 voltage and FBT correct? Check CBLK blanking pulse signal at present on pin 18 IC901 pin of IC001 on A-Board? blanking pedestal Check IC001 present in the waveforms and related at pins 20, 24 & components 27 of IC001? Check IC002...
  • Page 30 MISCONVERGENCE Reset using front panel control Try adjusting convergence using front panel controls Try adjusting convergence Is the convergence Done using DAS now within spec? Check the convergence Is the convergence circuit (IC701 & IC702 within spec? & IC703) Is the convergence circuit (IC701, IC702, IC703) Change DY and readjust convergence...
  • Page 31 POOR FOCUS Adjust focusVRs Age monitor Improved and check for focus? focus change Check focus leads from FBT to CRT socket Check CRT socket Is dynamic focus circuit OK? (See Parts Level Board Repair Section) Replace CRT and verify focus Done...
  • Page 32 UNSYNCHRONIZED IMAGE Check input signals CN903 pins 6 and 7 and CN302 pin 4 Are signals Check video correct? cable Check IC001 Signal at CN309 and related pin 8 OK? components Check wire Signal at CN903 dressing and pin 8 OK? connections Check circuits on D-board (IC901...
  • Page 33 ABNORMAL GEOMETRIC DISTORTION Download factory settings Identify distortion Is geometric problem and repair distortion (See Board Level Repair correct? Section) Done...
  • Page 34 ABNORMAL IMAGE SIZE With user controls adjust picture size Horizontal size adjustment OK? (See Parts Level Board Repair Section) Vertical size 4 or 5 adjustment OK? (See Parts Level Board Repair Section) Adjust monitor Done...
  • Page 35 SHUT DOWN Check power Is amber supply LED blinking? Check shutdown log in IC901 Check horizontal, vertical deflection system and Scan failure? check power supply secondary voltages Check high High voltage voltage system failure? ABL OK? (See Parts Level Board Repair Section) Set factory settings inside IC901...
  • Page 36 NO COMMUNICATION Are connections Correct to monitor OK? connection Are computer Correct settings settings and and connections connections OK? Check Connector Is 5 volts present and power supply at CN901 pin 2? Check IC901 and related components Done...

  • Page 37: Parts Level Board Repair

    PARTS LEVEL BOARD REPAIR Parts Level Board Repair (1) Power Supply (2) Horizontal Deflection (3) High Voltage (4) Vertical Deflection (5) Horizontal Size (6) Horizontal Center (7) Key and Pin (8) Key and Pin Balance (9) Rotation (10) ABL (11) Dynamic Focus (12) Video (13) Convergence (14) USB/Audio Power Supply...
  • Page 38 POWER SUPPLY Check F601 and D601 Are F601, D608, R605, R614, Replace parts, Check F601, D601, R657, R654, R623, R624, Is C610 DC verify voltages R612, R603, C650, and VA601, R600, TH600, rail voltage correct? IC601 OK? Q602, R651, IC610 Check secondary diodes, Check R627, Q503 R627, IC501, IC901, IC902,...
  • Page 39 HORIZONTAL DEFLECTION Is IC901 pin 27 Check IC901 and output OK? related components (H-USYNC) Is IC902 pin 17 Check IC902 and output OK? related components (H. Out) Check Q501, Is Q501 emitter Q502 & R504 output OK? Replace and check Is Q511 OK? related circuitry Replace and check...
  • Page 40 HIGH VOLTAGE Replace Q503, Is Q503 OK? D509 and check related components Check Q510, Are Q510, Q503 Q503 and related and related components components OK? Check IC501 Is IC501 pins 18 &19 output related components Is soldering or mount around Resolder if necessary RV501, C532 OK? Change FBT, verify...
  • Page 41 VERTICAL DEFLECTION Are IC401 pins 2 Check R412, R413 (+15V) and 4 and power supply (-15V) OK? IC902 pin 8 (VSAW), IC701 pin 5 Check IC902 (VrefOut) & IC401 pin 3 & IC701 waveforms Verify IC401 Is IC401 OK? and verify Change DY Adjust monitor...
  • Page 42 HORIZONTAL SIZE Check if IC501, Are horizontal and Q503 & Q510 vertical size large? Check Q520 and check related Is Q520 OK? components Is IC902 pin 9 Check IC902 (E/W) output OK? Repair H. Lin/ringing Is H Linearity OK? correction circuit Is IC501 pins 18 &...
  • Page 43 HORIZONTAL CENTER Replace R526, R529 R526 and R529 and check L510 Replace D530 D530 and D531 and D531 Check L510 Done...
  • Page 44 KEY AND PIN IC902 pin 9 (E/W) Check IC902 outputs normal? Are IC501 and Check IC501 and related components related components Check Q520 and related components Done...
  • Page 45 KEY AND PIN BALANCE Check if IC902 pin 18 Check IC901 output OK? Check related circuit components; fix and adjust monitor Done...
  • Page 46 ROTATION Check for shorts, +15V and -15V check power supply Normal? and check IC502 Replace IC502 and IC502 OK? adjust monitor Check rotation coil and connections Done...
  • Page 47 ABL FAILURE Check IC901 ABL register settings Is white balance Readjust and verify adjustment OK? Check high Is anode voltage correct? voltage circuits (26 KV) Check if R546, Check IC901, Is IC901 pin R545 and FBT FBT and related input voltage OK? related circuit components (ABL)
  • Page 48 DYNAMIC FOCUS Is IC902 pin 12 Check IC902 output normal? (V. Focus) Replace and Are Q504, Q505 and adjust monitor related components Are T503 and related Replace and components OK? adjust monitor Check connection to FBT and to Video board Done...
  • Page 49 VIDEO Check if Check connector C bus pins CN309, 1 & 2 of IC001 IC901 & +5V Check if Check CN302 pins 2, 4 signal in & 6 OK? Check IC001 Check if IC001 pins 20, 24 and 27 OK? Check if IC002 Replace parts pins 1, 3 &...
  • Page 50 CONVERGENCE Change "CONV_SW" REGISTER Check "CONV_SW" to "7" and Register is "7" adjust monitor Check if Check IC701, IC605 outputs IC701 outputs and +15V pins 8, 9, 6 and 7 power supply are OK? Check IC702 Check and IC703 if IC702 outpins 1, 6, and IC703 output pins +15V &...
  • Page 51 USB/AUDIO POWER SUPPLY Check F601 and D601 Check F601, D601, VA601, R600, TH600, Is C610/D635 Q602 and see Power Anode DC Rail Flow Chart (pg. 38) voltage correct? R651, IC610 and C677 Check R651, IC610 Does IC610 and the front panel try to start? power button Remove CN605...
  • Page 52 AUDIO Are proper Check audio signal audio levels present source and cable on J1702? Is VCC Check IC1702 supplied to and CN1701 IC1701? Are proper audio Check IC1701 levels present on IC1701 pins and related components 9, 12 and 16? Change Speaker Done...
  • Page 54 Sony Corporation English Sony Technology Center 2001BJ7415-1 Technical Services Printed in USA 9-978-878-02 Service Promotion Department © 2001.3...