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Sony WEGA KV27FV15 Training Manual
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Sony WEGA KV27FV15 Training Manual

Direct view television circuit description and troubleshooting
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See also: Service Manual
S
®
TM
WEGA
Television
AA-2W Chassis
Models: KV27FV15
KV36FV15
KV36FS10
KV36XBR250
Circuit Description and Troubleshooting
Course: CTV-26
Direct View
KV32FV15
KV32FS10
KV32XBR250
Training Manual

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Summary of Contents for Sony WEGA KV27FV15

  • Page 1 Training Manual ® WEGA Direct View Television AA-2W Chassis Models: KV27FV15 KV32FV15 KV36FV15 KV32FS10 KV36FS10 KV32XBR250 KV36XBR250 Circuit Description and Troubleshooting Course: CTV-26...
  • 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: Model: KV27FV15 KV32FV15 KV32FV15 KV36FV15 KV32FS10 KV36FS10 KV32XBR250 KV36XBR250 Prepared by: National Training Department Sony Service Company A Division of Sony Electronics Inc. Course presented by _____________________________________ Date___________________________________________________ Student Name ___________________________________________...
  • Page 4 SEL Service Company A Division of Sony Electronics Inc. 1 Sony Drive Park Ridge, New Jersey 07656 CTV261299 Printed in U.S.A.

  • Page 5: Table Of Contents

    Table of Contents Features Soft Start/Regulation/Foldback Soft Start Board Descriptions Regulation Picture Tube Defect Symptoms Foldback V Chip Secondary Voltages Introduction +135 Volts What is V Chip Technology? +12 Volts Parental Guideline Rating System +9 Volts Parental Control Menu +5 Volts Decoding Audio B+ Power Supply Block...

  • Page 6: Features

    15Wx2 15Wx2 10Wx2 15Wx2 This course covers AA2W chassis Sony direct view televisions. These Power sets are part of the WEGA line which contain the flat screen FD Trinitron 2 Tuner PIP picture tubes. This course describes the Power Supply, Deflection and...

  • Page 7: Board Descriptions

    Board Descriptions Name Description Micon, Y/C Jungle, Tuner, Pincushion, H Deflection, V Deflection, H Deflection, Syston Audio Amp, Surround Sound, Sub tuner, S-Link RGB Drive Power Supply Front A/V Inputs, Menu Buttons IR Detector Buttons T (XBR Only) IR Headphones UX (XBR Only) 3D Comb Filter, A/V Switch, Audio Control, SRS, Chroma Decode, PIP Encode UY (All Except XBR)

  • Page 8: Picture Tube Defect Symptoms

    Cathode to conditioning. The Sony manual degaussing tool can be used to degauss may be color. If that Grid 1 these tubes because of its reduced field intensity (P/N = 7-700-781-01).

  • Page 10: Chip

    Here you will be given informa- tion on what V chip technology is, how it is implemented in Sony televi- sions and what to do if the customer forgets their password.

  • Page 11: Parental Control Menu

    Ratings are decoded by the System Control IC in Sony televisions. These ICs contain the programmed information and the decoder. When a pro- gram is determined to have a rating that should be blocked, this is recog- nized.

  • Page 12: Power Supply Block

    Shortly after the click of the power relay at turn ON, another click is heard. Power Supply Block This click is RY601 Degauss Relay closing. This may be accompanied by a hum sound that indicates the operation of the degaussing coils. After Overview the AKB circuit operation is considered normal, the degaussing relay opens.
  • Page 13 T605 CONVERTER RECT. + SECONDARY INPUT RY600 SUPPLIES B+ 135V CN1641 A BOARD DEGAUSSING +135V RY601 SOFT START POWER ON FOLDBACK REGULATION CN641 STANDBY 5V PROTECTION G BOARD & LATCH CN642 AUDIO B+ CN1643 AUDIO GND STANDBY BOARD POWER SUPPLY POWER SUPPLY BLOCK 7CTV26 1/1/00...

  • Page 14: Standby Power Supply

    The waveforms below show what will be seen at Q621. Standby Power Supply Overview The standby power supply is a switching power supply used to create Standby 5V. The Standby 5V line is used to power the Tuning Micon and EEPROM and any other circuits which need power when the set is OFF.
  • Page 15 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 16 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 17 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 18: Power On/Degaussing

    Degaussing Power On/Degaussing When the set is turned ON, a click is heard from the Power Relay RY600. About one second later another click is heard from RY601 Degauss Re- Overview lay. After this a loud hum can be heard. This indicates that the degauss- This section discusses how the converter B+ voltage is created when the ing circuit is operating.
  • Page 19 IC622 BAO5T CN641/10 5V REG. STANDBY R623 STANDBY R603 C603 POWER SUPPLY CN602 R664 T602 T601 RY600 R607 D602 0.1 OHM CN603 F601 C605 VDR601 VDR602 C604 D629 6.3A R625 C607 CONVERTER D630 C606 CN601 R624 C601 RY601 THP602 GROUND THP601 O-HPSEL Q644...

  • Page 20: Converter

    Soft Start Converter The voltage across T604/7 and 8 Control Winding determines the fre- quency of operation. The control winding is a cross inductance winding. Overview At initial startup the converter has to switch above the optimum frequency The function of the converter is to switch the Converter B+ voltage through of T605 PIT.
  • Page 21 T605 +135V TO A BOARD +12V CN1641 SECONDARY CN641 SUPPLIES AUDIO B+ C615 AUDIO TO AK GND. BOARD CN1463 R607 R601 CN642 TO PROTECTION R615 D606/K D603 120K 310 V C618 R602 R612 C613 T603 120K C612 C609 R608 C608 VCC RECT.

  • Page 22: Troubleshooting

    Troubleshooting When performing this procedure, set your variac to zero. Jump the relay contacts. Warning: By jumping the relay contacts you have defeated One of the most common failures in switching power supplies are the the protection circuitry of the power supply. Plug the unit into the converter transistors or in the case of this power supply, IC601.
  • Page 23 T605 +135V TO A BOARD +12V CN1641 SECONDARY CN641 SUPPLIES AUDIO B+ C615 AUDIO TO AK GND. BOARD CN1463 R607 R601 CN642 TO PROTECTION R615 D606/K D603 120K 310 V C618 R602 R612 C613 T603 120K C612 C609 R608 C608 VCC RECT.

  • Page 24: Soft Start/Regulation/Foldback

    Regulation Soft Start/Regulation/Foldback The power supply is regulated by the control winding of PRT T603/7 and 8, in the following manner: Overview An increase in voltage across the control winding will reduce the induc- The three circuits discussed here all have an affect on the voltages across tance of the windings in T603, consequently increasing the converter fre- T603/7 and 8.
  • Page 25 STANDBY PART OF IC643 RY600 135V DM-58 R661 R658 FROM CONTROL D643 R659 C652 RECTIFIER R648 R647 D612 Q645 R649 C651 R627 Q647 T603 PRT CONTROL C602 WINDING R665 G BOARD G BOARD POWER R699 Q648 L=ON R621 Q653/B D614 FROM R626 LATCH...

  • Page 26: Secondary Voltages

    The voltage is 9.6 instead of 9 because D647 is connected between the Secondary Voltages ground pin of IC641 9 Volt Regulator and ground. +9 Volt Protection +135 Volts The +9 volt line also is monitored for OCP. Using the voltage drop across The signal from the winding of T605/10 and 11 is applied across D643 R680, R681 and R644 to control the conduction of Q649 does this.
  • Page 27 TO B+ OCP TO D653 OCP Q651/E D643 & IC643 FOR REGULATION R652 C697 C696 L642 C698 C695 FROM D648 C653 C615 C643 EZO150AV1 CONVERTER D652 IC650 FROM A BD. BA12T T601/1 CN641 C661 C658 12V REG D651 Q650 TO D605 R650 CN641 R645...
  • Page 28 Flyback Secondary Voltages Distribution The +12 volt line is derived from the signal at T503/9. It is sent through R537 and rectified by D531. In the event that a short occurs on this line, The following voltages are scan derived. This means that some windings R537 may open.
  • Page 29 The table below describes various symptoms that can occur if there is a Many times observing all the symptoms can lead you towards the correct short on any of the power supply lines. These types of problems occur failed component or problem. All of your senses should be used when when major components being supplied fail by shorting.

  • Page 30: Power Supply Protection

    Foldback Power Supply Protection The foldback circuit is a type of protection circuit that uses a winding on T605 PIT to monitor the current drawn by its secondary. This voltage is Overview rectified and called Vcc Rect. Q624 is set up with the Vcc Rectifier volt- There are three different circuits that can activate the protection latch.
  • Page 31 TO CN641/1 R652 135V D648 R653 EZO150AVI D653 +12V C656 R654 R606 C614 Q651 PART OF VCC RECT. Q623 D604 T605PIT R601 D603 R663 R655 R662 D608 D607 RD6.8ESB2 RD6.8ESB2 R602 R605 C618 NORMALLY TO Q648 POWER ON POWER ON FROM CN641/11 Q652 R610...

  • Page 32: Vertical Deflection

    These pulses keep Q652 ON and prevents C563 from charging. There- Vertical Deflection fore Q561 is always OFF while the set is operating normally. If the verti- cal flyback pulses were missing, the voltage from the 12-volt line through The vertical deflection stage consists of the Vertical oscillator, Vertical R570 would forward bias Q561 B-E.
  • Page 33 TO WA BOARD D388 MTZJ11B +12V SCAN CN942 C565 D561 DERIVED +12V SUPPLY D531 R537 CN1942 C564 FROM T503/8 Q561 R570 Q562 R573 R571 C563 R572 TO IC355/15 VM OUT/ IC561 V PROTECT STV9379 VERT.OUT FLYBACK GENERATOR R569 R384 R568 R387 R561 IC355...
  • Page 34 Failure Relay Clicks Video Audio Timer LED Power Switch OFF Two clicks. None Normal Flashing Normal Two clicks. Open Yoke Degauss never turns Power and OFF. degauss relays as normal. Short on Two normal clicks, No video for 30 seconds, Normal Flashing for Normal...
  • Page 35 TO WA BOARD D388 MTZJ11B +12V SCAN CN942 C565 D561 DERIVED +12V SUPPLY D531 R537 CN1942 C564 FROM T503/8 Q561 R570 Q562 R573 R571 C563 R572 TO IC355/15 VM OUT/ IC561 V PROTECT STV9379 VERT.OUT FLYBACK GENERATOR R569 R384 R568 R387 R561 IC355...

  • Page 36: Horizontal Deflection Block

    The purpose of the pincushion circuit is to correct for deflection distortion, Horizontal Deflection Block which occurs because of the yoke’s inability to create a linear beam scan. The result would be a picture bowed at the sides. We compensate for this Overview problem by using pincushion correction circuits to control the amount of current that can flow through the horizontal output’s return.
  • Page 37 Q501 Q501 T503 H OUT H DRIVE FLYBACK SCAN +200 DERIVED Y/C/J SUPPLIES IC355 E/W DRIVE Q512 PIN AMP CENTERING LINEARITY HP/H OFF H PROTECT HORIZONTAL DEFLECTION BLOCK 14CTV26 01/01/00...

  • Page 38: Horizontal Out

    Horizontal Output Horizontal Out Q502 is the H output transistor and it drives two circuits: • The deflection yoke – Develops a magnetic field in order to move the Overview electron beam from left to right on the screen. The horizontal output circuit below consists of the Horizontal Oscillator, •...
  • Page 39 135V R385 MAIN R504 R383 T503 1/2 R552 FLYBACK T501 TO 2nd. IC355 R539 Q502 ANODE R513 CXA2131S Y/C/J C507 C502 D502 C509 Q501 R507 R501 200V C554 D503 C527 TO C R503 C503 C510 BOARD C505 R502 C511 FROM C504 135V Q512...

  • Page 40: Pincushion

    This signal is then applied to the base of Q511 Pin Out. The signal is Pincushion inverted by Q511 and then input to the base of Q512. The result is that a PWM waveform is seen at Q512/C. Q512/C is connected to the return for Overview the horizontal output.
  • Page 41 TO Q504 FROM T503/11 NECK PROTECT FROM IC355/11 +135V R540 C520 R506 R515 FROM C510 R581 MAIN HP C521 C519 R526 TO H D536 D535 R523 R327 D515 L511 C525 R524 DWG. C522 C528 R517 R516 R525 R518 R519 Q512 D516 Q511 IC501...

  • Page 42: H Protect

    IC501/2 is also connected to Q503/C. Q503 is OFF as long as the signal H Protect from the Pin Out circuit is working normally. If the Pin Out signal were missing, Q504, which is normally ON, would turn OFF. If Q504 were to Overview turn OFF, Q503 would turn ON.
  • Page 43 FROM +12V +12V 135V C510 HP R539 R533 IC355 R527 IC501 2/2 CXA2131S NORMALLY D530 Y/C/J Q503 FROM 8.2V Q301 Q504 R361 R544 HP/PRM Q512/C R356 C548 D302 C549 R514 TO Q501 R521 C543 D521 H DRIVE MTZJ-7-5X R532 FROM R550 R529 T503/5...
  • Page 44 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-27FV15 Date: October 1, 1999 Subject: Part Number Correction Reference No. 4, A Board Symptom:...
  • Page 45 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-36FS10, KV-36FV15, KV-36XBR250 SU-36FD2 Date: October 1, 1999 Subject: Glass Stand Door rubbing on bottom of...
  • Page 46 Replace the Pivot on the top of the Glass Doors, and add the washer to the bottom pivots. See Fig 3. Fig 3...
  • Page 47 CONFIDENTIAL  Sony Service Company Service Bulletin National Technical Services csv-1 A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-27FV15, KV-32FS10, KV-32FV15 KV-32XBR250, KV-36FS10, KV-36FV15 KV-36XBR250 Date: October 7, 1999 Subject: Blinking Picture With Local Weather Channel...
  • Page 48 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-27FV15, KV-32FS10, KV-36FS10 KV-32FV15, KV-36FV15, KV-32XBR250 KV-36XBR250 Date: September 20, 1999 Subject: G Board Schematic Correction...
  • Page 49 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-32FS10, KV-32FV15, KV-36FS10 KV-36FV15, KV-32XBR250, KV-36XBR250 Date: October 7, 1999 Subject: V Bow and H Trap Adjustments...
  • Page 50 Adjust the taps simultaneously to achieve the best geometry. After adjusting this magnet, please confirm the over all geometry again. (V-Trap, etc could also affect the geometry as well.) H Trap Distortion: If H-Trapezoid geometry is present, you can adjust the H trap (RV941) on the WA Board.
  • Page 51 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-24FV10, KV-27FV15, KV-32FV1, KV-32FS10 KV-32FV15, KV-32XBR200, KV-32XBR250 KV-36FV1, KV-36FS10, KV-36FV15 KV-36XBR200, KV-36XBR250 Date: October 7, 1999...
  • Page 52 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-32XBR250, KV-36XBR250 Date: November 4, 1999 Subject: Headphone Part Number Missing Symptom: (XXXX) The part number for the Headphone MDR-IF0230 is not listed in the Service Manual.
  • Page 53 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-27FV15, KV-32FS10, KV-32FV15 KV-32XBR250, KV-36FS10, KV-36FV15 KV-36XBR250 Date: November 15, 1999 Subject: Control Door Breakage...
  • Page 54 CONFIDENTIAL csv-1  Sony Service Company Service Bulletin National Technical Services A Division of Sony Electronics Inc. TV Products Park Ridge, New Jersey 07656 Model: KV-27FV15, KV-32FS10, KV-36FS10 KV-32FV15, KV-36FV15, KV-32XBR250 KV-36XBR250 Date: November 22, 1999 Subject: S-Link, IR Headphone, OSD, and 3D Comb...
  • Page 55 32/36 Non XBR Models: 1. In the service Mode record on paper the following register information in both RF & Video mode: VP SSHP RF Data ______ Video Data:_______ DA 2COL RF Data ______ Video Data:_______ DA 2SHU RF Data ______ Video Data:________ 2.

This manual is also suitable for:

Wega kv32fv15Wega kv36fv15Wega kv32fs10Wega kv36fs10Wega kv32xbr250Wega kv36xbr250

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