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OPERATION MANUAL
TROUBLESHOOTING MANUAL
TABLE OF CONTENTS
D Board (Power Supply Section) ............. 2
D Board (Deflection Section) ................... 9
A Board .................................................. 20
GENERAL TROUBLESHOOTING .............. 26
PARTS LEVEL BOARD REPAIR ................ 37
TRINITRON
®
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D99
COLOR COMPUTER DISPLAY
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1
CHASSIS
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Table of Contents
Troubleshooting
Related Manuals for Sony D99 CHASSIS
Summary of Contents for Sony D99 CHASSIS
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Page 1: Table Of Contents
CHASSIS OPERATION MANUAL TROUBLESHOOTING MANUAL TABLE OF CONTENTS CIRCUIT DESCRIPTION D Board (Power Supply Section) ..... 2 D Board (Deflection Section) ....9 A Board ..........20 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 The power supply is located on the D Board. It has three modes of operation that are controlled by a microprocessor. The topology is a discontinuous mode flyback converter with photocoupler feedback for regulating the secondary voltages. Circuit operation and troubleshooting are explained in the following sections: Operation Modes Secondary Circuitry... - Page 3 AC Input and Degauss 1. AC Input Section The AC input section provides EMI filtering, input protection, surge limiting and CRT degauss operation. EMI Filter The EMI filter comprises CN600 (inlet with filter), X-capacitors C604 and C605, Y-capacitors C606, C638, C660 and C643 and the line filter transformer, LF602.
- Page 4 Pin 4 – Driver: Outputs the pulse width modulated gate drive for switching transistor Q602. Maximum duty cycle is set internally at 80%. Pin 5 – Isense: Provides cycle by cycle over current protection by turning off pin 4 driver output when Q602 current exceeds the current limit corresponding to 500mV at pin 5.
- Page 5 Horizontal Centering This circuit supplies IC503, which is used to adjust horizontal raster position on the CRT. The horizontal centering circuit consists of fusible resistors R638 and R639, diodes D615 and D616 and filter capacitors C630 and C631. In respect to the secondary ground, the horizontal centering ground is floating and connected to –H DY line.
- Page 6 Feedback Circuits reference voltage at IC604 pin 1 determines the sink current into pin 3. The reference voltage is set to 2.50 volts by resistor divider R608, R650, R648, and R609. Since the B+ is connected to the resistor divider, any change in B+ voltage is detected at the reference terminal.
- Page 7 Protection Circuits 4. Protection Circuits The following are protection circuits: OCP, OVP, UVLO and secondary short circuits. OCP is pulse by pulse and is performed on the primary side. OVP detects excessive output voltages. UVLO detects output under voltages. The following will explain the operation of these functions.
- Page 8 No Power In the event that the monitor does not turn on, first verify input power is applied to CN600 and the front panel power switch is turned on; then check F601 and R605. If these parts are blown, the primary side circuitry should be checked. If the fuses are not blown, then check the secondary side circuitry, especially the protection circuits.
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Page 9: D Board Deflection Section
+5/12 Volt Regulator Loss of voltage due to shorts or device failures on either +12 or +5 volt output lines can occur. Consequently, IC605 or IC608 can be damaged and need replacing. Before replacing either IC, check for shorts or damaged parts along the output lines. - Page 10 H Deflection Circuit C543 C563 R551 R553 180V H Def H Reg C575 H Lin and FB506 Ringing Circuit PWM IC501 R581 E/W PIN #9 IC902 H SHAPE D518 Q518 R569 R586 R582 Q520 C582 R583 T504 B+CHOP C574 C576 HDY- D516 HDY-...
- Page 11 Troubleshooting See attached “FLOW CHART” and confirm if it’s really H Deflection issue. No H Deflection / No Power Check Q507, Q520 and D506 first. In case any of these shorted, check T504, Q511, R511 and D502. Those parts might have been damaged. If both of Q507, 520 were not broken, check the HD pulse at the gate of Q511.
- Page 12 CN501 HDY - #5.6 pin H SIZE/Shape Feedback R593 L508 RY500 L509 R591 R589 R592 4.7k D519 1/2W Q519 R516 1/2W T505 1SS119 DTC114TSA C517 1/2W 0.01 C572 R576 250V D512 R575 1SS119 R590 C583 C581 Q521 1/2W 2SA1309A :FPRD R578 C514 H CENTERING CIRCUIT...
- Page 13 C670 FROM D615 IN P.S. C580 R570 HC N FROM PIN #17 T601 D511 FROM D616 IN A.S. R579 C631 T120 R571 R538 IC502 R573 Q518 R529 R500 L510 Q506 R514 TO H. DY(-) VIA L503 R572 C559 (DRAIN OF Q520) H CENT C509 C570...
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Page 14: Dynamic Focus Circuit
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 Trouble Shooting See attached “FLOW CHART” and confirm if it’s really H Center Circuit issue. No Raster Centering Control Check R638, 639 (Right next the SRT) first. - Page 15 H DF Horizontal Parabola is injected into the secondary side of the focus transformer (DFT:T503). In order to keep the amount of parabola constant over the horizontal frequency range the values of the AC coupling capacitors are changed by the transis- tors, which switch the s-caps.
- Page 16 Dynamic Focus Circuit D515 R543 C540 :DFT T503 VDF PIN #12 IC902 R565 R506 C568 330k 330k C531 C509 C516 Q506 0.047 C529 C523 R502 0.068 100p R505 2SA1309A 400V 0.12 0.047 180k 250V 500V C511 250V 250V C525 400V :RN-CP 0.22 0.047...
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Page 17: Vertical Deflection Circuit
Explained later 7. Protection Circuitry Overview Overview The D99 chassis was developed with protection circuits other than HV/ABL.These protection circuits are controlled by Microprocessor (IC901); - Thermal Shutdown: Activates when S-Cap Switch in FET are broken (especially Q513 and Q514). - Page 18 R595 R547 HV DET PIN # 18 C542 LEAD IC901 R549 C540 C544 R552 D514 C535 R510 R548 R550 R596 R934 ABL DET PIN #1 R545 ABL DET PIN #16 BOARD IC901 C928 C541 R546 19 D99 CHASSIS HV/PROTECTOR CIRCUIT...
- Page 19 +15V +16V C403 D401 IC401 C404 Flyback Generator IC 701 R410 (CONV) Vref C409 R409 TDA8177 V-DY through CN501 LVDY R401 C402 IC 902 R406 (Jungle) -15V R402 C401 VSAW R404 C406 R403 R405 D-BOARD...
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Page 20: A Board
G2 Voltage V Sync and H fly G2,Cutoff OSD Generation 17 D99 Chassis A Board Block Diagram monitor goes to be shutdown as a V scan failure by microprocessor after wait around 1.5sec w/o VFLY. Troubleshooting Hints Vertical Scan Failure The first step is to check the shutdown log of the monitor and make sure the microprocessor has detected a loss of VFLY. - Page 21 Video Select and RGB Process Functions +80V +12V +12V IC003 IC001 D104 C106 Video Input (0.7Vpp) C206 C306 C Data C CLK D105 CBLK Cutoff BPCLP D106 Control R_OSD D206 B_OSD B_OSD D306 OSD_BLK +12V IC004 D/A G2 Control 1. RGB Signal Processing (A Board) RGB Signal Amplifiers RGB video signals are amplified by IC001.
- 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...
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Page 23: On Screen Display Functions
3) If colors are wrong or missing and white balance cannot be adjusted check: - Each individual color signal path comparing DC offset and peak to peak signal levels to each other to determine if there is any single amplifier at fault. - For shorted diodes on the IC002 outputs. - Page 24 DDC Data format and VGA Connector Allocations Basic EDID consist of 128 bytes 15 pin VGA type connector Number Description Pin No. Assignment Pin No. Assignment 8 Bytes Header RED Video Option 10 Bytes Vender/Product Identification GREEN Video Data(SDA) 2 Bytes EDID Version/Revision BLUE Video H SYNC...
- Page 25 D IG IT A L C O N T R O L C O M M U N IC A T IO N D IA G R A M V ID E O B O A R D B IA S H V s yn c D R IV E C O N T R A S T...
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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
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
MISSING COLOR proper video Check signal levels present generator & on CN313 pins cable 2, 4 & 6? proper AC voltages present on all cathodes? (See Parts Level Board Repair Section) Check IC004, proper DC IC001 pins 7, voltages present 8, 9 and +B on all voltage... - Page 29 VISIBLE RETRACE Check white balance adjustment Check IC005, G2 control circuit, IC001 G2 voltage pin 6 and correct? Check 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 &...
- 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...
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Page 31: Poor Focus
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
UNSYNCHRONIZED IMAGE Check input signals CN313 pins 4, 8 and 9 Are signals Check video correct? cable Check sync Signals at CN309 separation circuits pins 4, 5 and 7 OK? on video board Check wire Signals at CN903 dressing and pins 4, 5 and 7 OK? connections Check circuits on... - 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...
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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... -
Page 38: Power Supply
POWER SUPPLY Check F601 and D601 Check R627, Q503 Does power Q510, Q520, Q507, supply make chirping noise? and video board Check IC602, IC603, Q503, Q510, R614, R654, R623, R624, D605, Q604, Tries to start? R627, Q520, Q507 Check for overload on IC607 Replace Q602, Check F601, R654,... -
Page 39: Horizontal Deflection
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
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
VERTICAL DEFLECTION Check power Are +15V and 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 Done... -
Page 42: Horizontal Size
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
HORIZONTAL CENTER pin 4 (HCENT) Check IC901 of IC901 working Check IC503 voltages at D615 Check D615, D616 and D616 OK? Replace IC503 Check related components or FRU Replace corresponding Q518 and Q506 parts & adjust and R529 OK? monitor Done... -
Page 44: Key And Pin
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
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 Readjust Is white balance and verify adjustment OK? Check high Is anode voltage correct? voltage circuits (27 kV) Check if R546, Check IC901, Is IC901 pin R545 and FBT FBT and related input voltage OK? related circuit components (ABL)
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Page 48: Dynamic Focus
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 CN306, 1 & 2 of IC001 IC901 & +5V Check if Check CN313 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-OFF" REGISTER Check "CONV_OFF" to "0" and Register is "0" adjust monitor Check if Check IC701, IC605 outputs IC701 outputs and +15V pins 8, 9, 6 and 7 power supply are OK? Check Check IC702 if IC702 outpins 1, and IC703 6, and IC703 output pins +15V &...
- Page 52 Sony Corporation English Sony Technology Center 99JJ74183-1 Product Quality Division Printed in USA 9-978-862-01 Service Promotion Department © 1999...