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Sony KV-13FM12 Training Manual
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Sony KV-13FM12 Training Manual

Direct view television
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See also: Service Manual
S
®
Direct View Television
BA-5 Chassis
Models: KV-13FM12
KV-13FM13
KV-13FM14
KV-20FV12
KV-20FS12
KV-24FV12
Circuit Description and Troubleshooting
Course: CTV-27
KV-27FS12
KV-27FS16
KV-27FV16
KV-32FS12
KV-32FS16
Training Manual
KV-20FS12

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Summary of Contents for Sony KV-13FM12

  • Page 1 Training Manual ® Direct View Television BA-5 Chassis Models: KV-13FM12 KV-27FS12 KV-13FM13 KV-27FS16 KV-13FM14 KV-27FV16 KV-20FV12 KV-32FS12 KV-20FS12 KV-32FS16 KV-24FV12 KV-20FS12 Circuit Description and Troubleshooting Course: CTV-27...
  • Page 2 Sony Service Company A Division of Sony Electronics Inc ©1999 All Rights Reserved Printed in U.S.A. S is a trademark of Sony Electronics...
  • Page 3 Circuit Description and Troubleshooting: Models: KV-13FM12 KV-27FS12 KV-13FM13 KV-27FS16 KV-13FM14 KV-27FV16 KV-20FV12 KV-32FS12 KV-20FS12 KV-32FS16 KV-24FV12 Prepared by: National Training Department Sony Service Company A Division of Sony Electronics Inc. Course presented by _____________________________________ Date ___________________________________________________ Student Name ___________________________________________...

  • Page 4: Table Of Contents

    Table of Contents Features Inrush Current Protection Audio Features Switching Power Supply Video Features Startup Convenience Features Regulation Input/Output IC601 Internal Protection Feature Glossary Operating the Supply without a Load Board Descriptions Troubleshooting +135 OCP and H Protect Overall Block Latch and Hold Down A board H Protect...
  • Page 5 Y/C Processing Audio with K Board RGB Drive Audio Iinputs and Processing IK Pulses and Video Blanking Audio Amp Tube Bias Appendix - Excerpt from CTV-26 Troubleshooting Standby Power Supply Video Path 27” and Above Converter Operation Inputs and Monitor Out Regulation Comb Filter Over Current Protection (OCP)

  • Page 6: Features

    The following table shows the type of surround sound and audio output Features power: Surround Power Output Overview KV-13FM12 The following section discusses the various features for BA-5 models. 3W x 2 KV-20FS12 These features will be separated into four categories: Audio, Video, Con- KV-20FV12...

  • Page 7: Convenience Features

    Y/Pb/Pr Composite * Fix/Var. Out the color temperature to warmer or cooler to match the program. KV-13FM12 Enhanced 16:9 Mode - This mode uses vertical compression to enhance “anamorphic” widescreen video from DVDs. KV-20FS12 Advanced On Screen Menu – A new colorful On-Screen Menu that is KV-20FV12 more intuitive and easier to use.

  • Page 8: Board Descriptions

    Board Descriptions 24” and Under Board Name Description Power Supply, A/V Inputs, DGC, Tuner, Pincushion, H Deflection, V Deflection, Audio Amp, Switches, LEDs Audio Processor and SRS Processor CRT Drive and N/S Amp Syscon, Y/C Jungle, Comb Filter, 27” and Over Board Name Description Power Supply, A/V Inputs, DGC, Tuner, Pincushion, H Deflection, V Deflection, Audio Amp...
  • Page 9 B board CB Board CA board VB board VA board D board P board A board MB board K board A board K board (KV-20FV12 & KV-24FV12 only) 24 Inch and Under 27 Inch and Over (KV-27FV16 pictured)

  • Page 10: Overall Block

    Deflection Overall Block The horizontal, vertical and pincushion correction circuits are contained on the A board. These circuits control the current through the yokes in Overview order to correctly scan the CRT. The FBT produces supply voltages for The BA-5 chassis is new for the 2000 model year. It is the first of the BA the vertical output and creates high voltage, focus voltage and G2 screen type chassis to cover 13”...
  • Page 11 CA OR CB P BOARD A BOARD BOARD VIDEO AMP. 200V YOKE VIDEO A/V INPUTS SWITCH & MAIN DEFLECTION Y/C/J TUNER +12V AUDIO -15V SW. OR CV Y DEFLECTION K BOARD YOKE COMB AUDIO FILTER TUNER AMP. OR B BOARD I PROTECT STANDBY 7.5V...

  • Page 12: Power Supply And Self-Diagnostics

    Protection Power Supply and Self-Diagnostics Protection circuits are included to deactivate the set if the following fail- ures occur: Power Supply Standby +7.5 volt OVP – If over voltage occurs on this line, a LOW will When the unit is first plugged in, power is applied through the AC In block be output to the base of the relay drive transistor.
  • Page 13 MA/MB BOARD IC502 VERTICAL OUTPUT I PROTECT STANDBY STANDBY STANDBY 7.5 SUPPLY CA/CB BOARD IC1702 IC1001 SYSCON DRIVE STANDBY/ TIMER LED STANDBY AC IN DEGAUSS +135 HLDWN RELAY POWER IC501 LATCH RY602 DETECT FROM FBT AUDIO SWITCHING +135V SUPPLY LV SUPPLY A BOARD 4CTV27 4/25/00...

  • Page 14: Self Diagnostics

    Self Diagnostics The set will usually act differently from what is shown in the table when it is powered up with a defect present. However indications will still be The table below shows the number of times the Standby/Timer LED flashes given that can guide you in troubleshooting.
  • Page 15 MA/MB BOARD IC502 VERTICAL OUTPUT I PROTECT STANDBY STANDBY STANDBY 7.5 SUPPLY CA/CB BOARD IC1702 IC1001 SYSCON DRIVE STANDBY/ TIMER LED STANDBY AC IN DEGAUSS +135 HLDWN RELAY POWER IC501 LATCH RY602 DETECT FROM FBT AUDIO SWITCHING +135V SUPPLY LV SUPPLY A BOARD 4CTV27 4/25/00...

  • Page 16: Power On/Degaussing

    ing instructions. One of its first tasks is to read and load the contents of Power ON/Degaussing the external NVM into the registers of IC1001 via the I²C bus. The data in the NVM contains the service data as well as any data relating to cus- Overview tomer control settings such as volume level.
  • Page 17 *REPLACED BY JUMPERS IN 24" AND ABOVE MODELS CN602 A BOARD F601 CN601 R613 THP601 C648 C655 L605 RY601 Q609 T602 R605* R606* +12V R635 R636 R634 C648 D601 CONVERTER BRIDGE RECTIFIER STANDBY STANDBY 7.5V D605 RY602 POWER SUPPLY R607 R661 Q607 H=DGC...

  • Page 18: Inrush Current Protection

    D603 is a 33 volt zener used for protection. It is not activated during initial Inrush Current Protection turn ON because C609 needs to charge. C609 is a 100-uf capacitor. C609 will not charge to a level of 33 volts before D606 turns ON. This Overview keeps the circuit from activating at power ON.
  • Page 19 PH601 REGULATION PC123FY2 FROM PHOTO COUPLER IC602/2 +135V PH601 R645 PC123FY2 SWITCHING B+ TO T603/5 FROM C620 TO R637 R649 SWITCHING R626 C614 SUPPLY REGULATION AC HI R605 R606 IC601/1 R651 FROM Q603 R644 OCP/FB D605 RY602 Q602 R627 AC LO C613 R625 FROM...

  • Page 20: Switching Power Supply

    This switching ON and OFF of the internal FET, whose Drain and Source Switching Power Supply are IC601/3 and 2 respectively, produces a signal output at T603/7 that is rectified by D613 and applied to IC601/4 VIN. The DC voltage produced Overview by D613 is used to sustain the input voltage at IC601/4 VIN.
  • Page 21 123.7 VDC IC601 STR F6624/6654 A BOARD CONVERTER R645 FROM VIN OCP/FB D GND +135 ERROR PH601 FROM PC123FY2 R644 IC602/2 122.8 VDC IN RUSH *Q603 R637 R662 R660 D613 CURRENT PROTECT D614 FROM D611 R633 R646 Q602 C620 R638 T603 R643 R632...

  • Page 22: Ic601 Internal Protection

    FET ON 4 VOLTS LATCH OSC. FDBK FET OFF TRANSIENT DC LEVEL CONTROLLED BY PH601 UVLO IC601/1 PH601 is an opto-isolator. Pins 1 and 2 are connected to the +135 volt line and to IC602/2 Error Amp. These pins are the terminals of an LED. Variations in the +135 volt line effect how much light is output from the LED.
  • Page 23 123.7 VDC IC601 STR F6624/6654 A BOARD CONVERTER R645 FROM VIN OCP/FB D GND +135 ERROR PH601 FROM PC123FY2 R644 IC602/2 122.8 VDC IN RUSH *Q603 R637 R662 R660 D613 CURRENT PROTECT D614 FROM D611 R633 R646 Q602 C620 R638 T603 R643 R632...

  • Page 24: Operating The Supply Without A Load

    will repeat. Every time this cycle repeats, a chirping sound can be heard You should also note that under the above conditions the +135 volt output from the power supply. This chirp occurs when the VIN voltage rises at L603 remained at 136 volts throughout. The signal seen at IC603/3 again to a voltage at which IC601 can operate.
  • Page 25 123.7 VDC IC601 STR F6624/6654 A BOARD CONVERTER R645 FROM VIN OCP/FB D GND +135 ERROR PH601 FROM PC123FY2 R644 IC602/2 122.8 VDC IN RUSH *Q603 R637 R662 R660 D613 CURRENT PROTECT D614 FROM D611 R633 R646 Q602 C620 R638 T603 R643 R632...

  • Page 26: Troubleshooting

    Troubleshooting The following table is a list of symptoms that occur when any of the supply voltages are shorted to ground at turn ON. This may be helpful in troubleshooting. It is important that you take into account all the symptoms to aid in your troubleshooting, Voltage Relay Clicks Video...
  • Page 27 NOTES...

  • Page 28: +135 Ocp And H Protect

    greater than that at IC501/6. This would cause IC501/7 to output a HIGH. +135 OCP and H Protect This HIGH voltage activates the Latch. Note: This is a departure from the way previous models have worked. Typically when the H pro- Overview tect circuit was activated, it turned ON a transistor that grounded the HP input to the YCJ.
  • Page 29 HLDWN +135 STANDBY 7.5V TO IC1001/35 R508 MB BOARD POWER R661 RELAY R630 RY602 Q607 D518 Q507 R571 +12V RD8.2ES D517 R561 R567 IC501 R572 R565 C547 Q506 HV DETECT D519 R548 FROM C549 R566 T505/7 R563 C546 D520 R556 STANDBY +135 R558...

  • Page 30: Deflection Block

    Vertical Deflection Block The vertical drive signals are generated by the YCJ after it successfully completes initial communication with the Syscon. These signals are Horizontal output from IC1301/13 and 14 and are applied to IC502 Vertical Out. The IC1301 YCJ generates the horizontal drive signal and outputs it from pin output from IC502 Vertical Out is applied to the vertical yoke to control the 34.
  • Page 31 +200V HEATER T505 FOCUS H.DRIVE H DY+ H. OUT Q501, Q502 T501 IC1301 Y/C/J H DY- H. CENT. LINEARITY PIN OUT CIRCUIT +12V -15V IC501, Q503, Q504 V DY- IC502 V.OUT V DY+ CN601 NECK ASSEMBLY IC1001 SYSCON DF/QP QP OUT DRIVE 27"...

  • Page 32: Horizontal Deflection

    If IC1301 YCJ is outputting HD, the next step is to see if this signal is Horizontal Deflection present at the base of Q501 H Drive. If the signal looks good at Q501/B then the base of Q502 H Out could be unloaded by unsoldering 1 side of Overview R504.
  • Page 33 IC1301 CXA2131AS Y/C/J 135V MAIN R547 MB BOARD T505 1/2 R516 R502 D509 T501 FLYBACK TO 2nd. Q502 R509 R385 R383 ANODE R504 C505 FOCUS C502 R510 D504 Q501 C509 C535 C516 200V C515 C503 C508 C501 C504 C507 R501 R503 FROM R548...

  • Page 34: Vertical Deflection

    If these signals are missing, check IC1301/13 and 14. If these signals are Vertical Deflection not present, check the data and clock lines at IC1301/34 and 35. The YCJ will not output vertical drive unless communication is okay between Overview the YCJ and the Syscon.
  • Page 35 +12V SCAN I PROTECT D510 C541 R541 DERIVED TO CN003/5 R550 D514 SUPPLY MB BOARD FROM T503/9 IC502 TDA8172 VERT.OUT FLYBACK 35 34 33 R384 R517 GENERATOR R518 R387 R540 IC1301 R519 -15v CXA2131AS R539 C543 R538 Y/C/J CN501 VTIM R536 -15V SCAN DERIVED...

  • Page 36: Video Path 24" And Under

    Digital Comb Filter Video Path 24” and Under The Digital Comb Filter is used when composite video inputs are used. The composite video signal output at IC1301/6 is buffered and filtered by Overview Q1311, Q1312, FL1301 and Q1310. You should note that the chroma The following section will discuss the video path for 24”...
  • Page 37 CN2009 CN1004 J201 IK RETURN FROM Q1331/C TO Q1317 R OUT VIDEO1 R BUFFER IC1304 TO Q1315 NJM2534M B OUT B BUFFER VIDEO CN2002 CN1003 DET.OUT TO Q1316 G OUT CVBS2 MAIN TU101 G BUFFER VIDEO VIDEO2 IC1301 J202 Y/C/J FRONT CN2001 CN1001...

  • Page 38: Rgb Drive

    Place your scope in delayed mode and highlight the area that appears to RGB Drive be one pulse. Expand it and you will see that there are three distinct pulses, one for each color. Your scope should be set to 5ms per division. Overview Some scopes that have less than 100MHz bandwidth may have trouble triggering on these signals.
  • Page 39 CN705 CN1303 R1392 R IN IC702 Q1350 Q1331 TDA6109JF B IN R1397 DRIVE G IN IKIN R1391 R1393 D701 D1310 D703 UDZ-TB-17 5 AB R709 R710 R708 D702 CN502 200V HEATER FROM RGB EXPANDED IC1301 R713 D511 CN706 R712 CXA2131AS R1379 R711 R718...

  • Page 40: Troubleshooting

    There is an input for the focus grid at pin 3 G4 of the tube. This input is See if the YCJ is outputting a pulse for each color. If there is communica- from the electrical focus control VR on the FBT. It should be set for opti- tion between the YCJ and Syscon, these pulses should be output.
  • Page 41 CN705 CN1303 R1392 R IN IC702 Q1350 Q1331 TDA6109JF B IN R1397 DRIVE G IN IKIN R1391 R1393 D701 D1310 D703 UDZ-TB-17 5 AB R709 R710 R708 D702 CN502 200V HEATER FROM RGB EXPANDED IC1301 R713 D511 CN706 R712 CXA2131AS R1379 R711 R718...

  • Page 42: Video Path 27" And Above

    model and contains a 3D Comb Filter. Whichever comb filter is used, Video Path 27” and above they will have the same effect on the signal path. They each take com- posite video input and output separated Y and C. These Comb Y and Overview Comb C signals are then re-input to the YCJ at pins 22 and 20 respec- tively.
  • Page 43 3D COMB FILTER A BOARD CV OR Y B BOARD TO IC001/28 Q304, FOR V CHIP C OUT CN2005 CN006 C320 (27FV16) Q306 YI IN VIDEO1 CN306 CI IN FROM J201 CVBSI IN CN2006 VIDEO3 CN005 C321 Q349, Q359, Q355, FL303, A IN Y OUT CVBS3 IN...

  • Page 44: Audio Without K Board

    there are headphones plugged into the headphone jack J401, the audio Audio without K Board will not be returned back. This may be useful for troubleshooting in the event of a bad headphone jack. Overview The back signal to CN407 is then applied to the R+ or L+ speaker terminal depending on which channel you are looking at.
  • Page 45 CN408 R427 R BACK CONTROL LINES A BOARD R GO FROM C438 L BACK CN2002/10 & 11 CN407 L GO TUNER HP GND. R428 TU101 C214 R422 S1 S2 AUDIO B+ C439 FROM L601 IC405 C215 R421 AUDIO SW. J201 C207 R425 NJM2521...

  • Page 46: Audio With K Board

    The outputs from IC404/13 and 28 are the main audio outputs of the set. Audio with K Board Depending on the model, this audio will be input to IC403 SRS or to the A board for amplification. If the model contains SRS, these signals are Overview input at IC403/23 and 24.
  • Page 47 K BOARD R410 IC403 TV-L MODE1 AUX0 R409 AUX1 MODE2 TV-R IN1A NJM2198 C448 R405 IC404 LOUT VI-L AUDIO RIN ROUT PROCESSOR C447 R404 24 23 15 16 VI-R NJW1130G C460 C458 CN450 CN460 IN2A R403 OUTB V2-L IN3A R406 OUTA V2-R LINE...
  • Page 48 APPENDIX...

  • Page 49: Standby Power Supply

    excessive voltage overshoot caused by the collapsing magnetic field of Standby Power Supply T621 SRT and returns the excessive voltage to C629. When the field collapses fully, current begins to flow through T621/1 and 3. *Note: The following is an excerpt from CTV-26, which covered the AA2W The waveforms below show what will be seen at Q621.
  • Page 50 T621 FB621 R639 4.7 OHMS D621 C631 D622 R640 TO RY600 FROM POWER RELAY T601/1 D623 AC Hi SIDE IC622 R631 5V REG 7.2VDC BAO5T D628 CN641 C630 R632 D624 STANDBY C650 +5V TO D698 Q621 D625 A BOARD 2SK2845 CN1641 D699 R633...

  • Page 51: Over Current Protection (Ocp)

    Over Current Protection (OCP) Secondary Output Monitoring the voltage across R637 is used for over current protection. The power coupled through T621 SRT places a voltage on T621/9 that, This voltage is representative of the amount of current flowing through when rectified and filtered by D628 and C637, is 7.2 volts.
  • Page 52 T621 FB621 R639 4.7 OHMS D621 C631 D622 R640 TO RY600 FROM POWER RELAY T601/1 D623 AC Hi SIDE IC622 R631 5V REG 7.2VDC BAO5T D628 CN641 C630 R632 D624 STANDBY C650 +5V TO D698 Q621 D625 A BOARD 2SK2845 CN1641 D699 R633...
  • Page 53 SEL Service Company A Division of Sony Electronics Inc. 1 Sony Drive Park Ridge, New Jersey 07656 CTV270500 Printed in U.S.A.

This manual is also suitable for:

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