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Sony FD Trinitron KV-21LT1E Service Manual

Fd trinitron color tv.
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SERVICE MANUAL
MODEL
KV-21LT1B
KV-21LT1E
KV-21LT1K
KV-21LT1U
KV-21LT1
MODEL
KV-21FT2K
RM-889
RM-887
FE-2
CHASSIS
KV-21FT2

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Table of Contents

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   Summary of Contents for Sony FD Trinitron KV-21LT1E

  • Page 1 SERVICE MANUAL MODEL KV-21LT1B KV-21LT1E KV-21LT1K KV-21LT1U KV-21LT1 FE-2 MODEL KV-21FT2K RM-889 RM-887 KV-21FT2 CHASSIS...
  • Page 2: Table Of Contents

    Section Title 1. GENERAL 2. DISASSEMBLY KV-21LT1 KV-21FT2 CAUTION SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE ANODE CAP. TABLE OF CONTENTS Page Section...
  • Page 3 l l a i n i . s l . s l e i l n i l...
  • Page 4 y t i WARNING (UK Models only) The flexible mains lead is supplied connected to a B.S. 1363 fused plug having a fuse of 5 AMP rating. Should the fuse need to be replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie one that carries the mark.
  • Page 5: Rear Connection Panel

    21 pin connector Rear Connection Panel KV-21LT1 Front Connection Panel KV-21LT1 Pin No Signal Audio output B Standard level : 0.5V rms (right) Output impedence : Less than 1kohm* Audio output B Standard level : 0.5V rms (right) Output impedence : More than 10kohm* Audio output A Standard level : 0.5V rms (left)
  • Page 6 The identification of errors within the FE-2 chassis is triggered in one of two ways :- 1: Busy or 2: Device failure to respond to IIC. In the event of one of these situations arising the software will first try to release the bus if busy (Failure to do so will report with a continuous flashing LED) and then communicate with each device in turn to establish if a device is faulty.
  • Page 7: General

    SECTION 1 GENERAL...
  • Page 12: Disassembly

    KV-21LT1 2-1. Rear Cover Removal => => Release the mains power cable from its securing posts. Remove the rear cover fixing screws indicated. Pull the rear cover away from the front beznet until clear of chassis. Note : Use a cross-head screwdriver with a blade length of at least 200mm.
  • Page 13 2-6. Picture Tube Removal WARNING: BEFORE REMOVING THE ANODE CAP High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.
  • Page 14: Kv-21ft2

    KV-21FT2 2-7. Rear Cover Removal => => Remove the rear cover fixing screws indicated. Pull the rear cover straight back until clear of chassis. 2-9. Service Position Position the A board as shown to gain access to its solder side. Take care not to trap the interconnecting leads in the process.
  • Page 15 2-11. Picture Tube Removal WARNING: BEFORE REMOVING THE ANODE CAP High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.
  • Page 16: Set-up Adjustments

    • When complete readjustment is necessary or a new picture tube is installed, carry out the following adjustments. • Unless there are specific instructions to the contrary, carry out these adjustments with the rated power supply. • Unless there are specific instructions to the contrary, set the controls and switches to the following settings : Contrast 80% [or remote control normal]...
  • Page 17 3-2. Convergence Preparation: · Before starting this adjustment, adjust the focus, horizontal size and vertical size. · Minimize the Brightness setting. · Input a dot pattern from the pattern generator. Horizontal and Vertical Static Convergence Center dot R G B H.STAT V.STAT convergence...
  • Page 18 Geometry Adjustment. Preparation: Before starting this adjustment, adjust the horizontal and vertical static convergence. Remove the deflection yoke spacer. Tilt the deflection yoke as indicated in the figure below and optimise the geometry. Tilting the DY Up and Down will balance the upper and lower pin adjustment.
  • Page 19 Layout of each control V.STAT Purity BMC (Hexapole) 3-3. Focus Adjustment Receive a television broadcast signal. Normalize the picture setting. Adjust the focus control located on the flyback transformer to obtain the best focus at the centre of the screen. Bring only the centre area of the screen into focus, the magenta-ring appears on the screen.
  • Page 20: Circuit Adjustments

    4-1. Electrical Adjustments Service adjustments to this model can be performed using the supplied Remote Commander RM-887. How to enter into the Service Mode Turn on the main power switch and enter into the stand-by mode. Press the following sequence of buttons on the Remote Commander.
  • Page 21 Sub Brightness Adjustment Input a Monoscope pattern. Press ‘TEST’ ‘TEST’ 13 on the Remote Commander. Adjust the ‘Sub-Brightness’ data so that there is barely a difference between the 0 IRE and 10 IRE signal levels. Sub Contrast Adjustment Input a video signal that contains a small 100% white area on a black background.
  • Page 22 4-2. TEST MODE 2: V SIZE Is available by pressing the ‘TEST’ button twice, OSD ‘TT’ appears. The functions described below are available by selecting the two numbers. To release the ‘Test mode 2’, press 00, 10, 20 ... twice or V LIN switch the TV set into Stand-by mode.
  • Page 23 Memo...
  • Page 24 5-2. CIRCUIT BOARD LOCATION CVM Board A Board 5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS Note : • All capacitors are in µF unless otherwise noted. • pF : µµF 50WV or less are not indicated except for electrolytic types. •...
  • Page 29 5-4. SEMICONDUCTORS LM393DT TDA2822M TEA2124 ( TOP VIEW ) SE-135N SE135N-LF12 3 GND TDA9392H TOP209P ( TOP VIEW ) BF421-AMMO 2SA1091-O DTA144ESA DTA144ESA-TP DTC114EKA DTC114EKA-T146 DTC143TKA-T146 DTC144EKA-T-146R 2SA1037K-T-146-R R2SA1162-G 2SA1037K-T-146-QR 2SD601A-QTX 2SC1623-L5-L6 2SC2412K-QR 2SC2412K-T-146-R IRF614-LF 2SA933AS-QRT 2SAG33ASQT 2SA933AS-RT 2SC1740S-RT LETTER SIDE 2SC2785-HFE 2SK2251-01-F19 AK04-V1...
  • Page 30 ERA81-004TP1 MTZJ-T-77-15B ERA83-006 MTZJ-T-77-33A MTZJ-3.6A MTZJ-33C MTZJ-T-77-2.2A MTZJ-7.5B HZS9.INBZ RD3.9ES-B2 MTZJ-T-77-3.6B RD5.6ESB2 MTZJ-T-77-5.6B RD6.8ES-B2 MTZJ-T-77-5.6C RD7.5ESB2 MTZJ-T-77-6.8A RD9.1ES-B3 MTZJ-T-77-6.8C RD10ESB2 MTZJ-T-77-8.2B RD15ESB2 MTZJ-T-77-7.5B 1SS119-25TD MTZJ-T-77-9.1A 1SS133T-77 MTZJ-T-77-9.1C MTZJ-T-77-10 CATHODE ANODE SLA-570KT3F CATHODE ANODE 1SS355TE-17 RD12SB2 UDZS-TE-17-4.7B UDZS-TE-17-5.6B UDZS-TE-17-6.8B UDZS-TE-17-9.1B UDZ-TE-17-22B ANODE CATHODE UF4005PKG23...
  • Page 31: Ic Block Diagrams

    5-5 IC BLOCK DIAGRAMS A BOARD IC604 BA41W12ST Vref A BOARD IC601 MCZ3001D Remote Vsense Internal DVLD ref 5v Sel=34v 15v/8v Latch Centre Timer A BOARD IC1201 TDA7494 Pwr Gnd Sgn Gnd A BOARD IC401/IC531 LM393TD Driver Reg. 10v Level Shift Control Logic...
  • Page 32: Exploded Views

    NOTE : • Items with no part number and no description are not stocked because they are seldom required for routine service. • The construction parts of an assembled part are indi- cated with a collation number in the remarks column. 6-1.
  • Page 33 6-2. KV-21LT1 PICTURE TUBE REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 34 NOTE : • Items with no part number and no description are not stocked because they are seldom required for routine service. • The construction parts of an assembled part are indi- cated with a collation number in the remarks column. 6-3.
  • Page 35 6-4. KV-21FT2 PICTURE TUBE REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 36: Electrical Parts List

    A BOARD COMMON Parts List : A BOARD VARIANT Parts List : Model KV-21LT1 KV-21FT2 C BOARD COMPLETE Parts List : MISCELLANEOUS : ACCESSORIES AND PACKAGING MATERIALS : ... 55 Note : Refer to the designated variant parts list when seeking a part indicated by an asterisk (*) Parts indicated (#) on the Schematic Diagram are not used in this model and therefore do not appear in the Parts List.
  • Page 37 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION *A-1632-893-A A Board, Complete (KV-21LT1B) *A-1632-880-A A Board, Complete (KV-21LT1E) *A-1632-892-A A Board, Complete (KV-21LT1K) *A-1632-894-A A Board, Complete (KV-21LT1U) *A-1632-898-A A Board, Complete (KV-21FT2K) A Board, Common Parts...
  • Page 38 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 39 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 40 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 41 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 42 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 43 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO A Board Variant Parts KV-21LT1B/21LT1E A Board Variant Parts KV-21FT2K *A-1639-004-A DESCRIPTION REMARK KV-21LT1K/21LT1U C Board, Complete...
  • Page 44 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMARK REF. NO. PART.NO DESCRIPTION REMARK...
  • Page 45 The components identified by shading and marked are critical for safety Replace only with the part number specified. REF. NO. PART.NO DESCRIPTION REMOTE COMMANDER REMARK REF. NO. PART.NO MISCELLANEOUS ACCESSORIES AND PACKAGING MATERIALS DESCRIPTION REMARK...
  • Page 46 • User programmable Functional Check through Infrared • Fast and documented Test Mode setting of all Sony TV chassis Additional features such as Adjustments and Troubleshooting are available in chassis-dependent software modules. Please contact your local Sony Service organisation for the latest information.

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