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Sony Trinitron KV-BM14M70 Service Manual

Sony trinitron color tv service manual
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REVISION HISTORY

MODEL
KV-BM14M70
NO.
SUFFIX
DATE
1
-01
2003/12
2
-02
2004/6
PART NO. :
SUPPL. / CORR
DESCRIPTION
– –
1st. Issue
Supp-1
R827 Part Number Change
BX1S
CHASSIS
9-872-430-02
(Page 63)

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Summary of Contents for Sony Trinitron KV-BM14M70

  • Page 1: Revision History

    REVISION HISTORY BX1S CHASSIS MODEL 9-872-430-02 PART NO. : KV-BM14M70 SUFFIX DATE SUPPL. / CORR DESCRIPTION – – 2003/12 1st. Issue Supp-1 2004/6 R827 Part Number Change (Page 63)

  • Page 2: Service Manual

    SERVICE MANUAL BX1S CHASSIS MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO. KV-BM14M70 RM-W101 Ukraine SCC-V14C-A RM-W101 TRINITRON COLOR TV ®...

  • Page 3: Table Of Contents

    THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE REPLACE THESE COMPONENTS WITH SONY PARTS ANODE. WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. – 2 –...

  • Page 4: Self Diagnostic Function

    KV-BM14M70 RM-W101 SELF DIAGNOSTIC FUNCTION The units in this manual contain a self diagnostic function. If an error occurs, the STANDBY (1) indicator will automatically begin to flash. A description of the self-diagnosis function is explained in the instruction manual. The number of times the STANDBY (1) indicator flashes translates to a probable source of the problem.
  • Page 5 KV-BM14M70 RM-W101 2. DISPLAY OF INDICATOR STANDBY (1) FLASH COUNT Diagnostic Item Flash Count* +B overcurrent 2 times 2 times V-Protect 4 times IK (AKB) 5 times 4 times Power Supply NG (+5V) 8 times 5 times for Video processor 8 times * One flash count is not used for self-diagnosis.
  • Page 6 KV-BM14M70 RM-W101 5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to "0". Unless the result display is cleared to "0", the self-diagnosis function will not be able to detect subsequent faults after completion of the repairs.

  • Page 7: Disassembly

    KV-BM14M70 RM-W101 SECTION 1 DISASSEMBLY 1-1. REAR COVER REMOVAL 1-2. SPEAKER REMOVAL 1 Rear cover 1 Two screw (+BVTP 3 × 12) 2 Six screws (+BVTP 4 × 16) 1-3. CHASSIS ASSY REMOVAL 1-4. SERVICE POSITION 1-5. TERMINAL BRACKET REMOVAL 1-6.

  • Page 8: Picture Tube Removal

    KV-BM14M70 RM-W101 1-7. PICTURE TUBE REMOVAL Note: • Please make sure the TV set is not in standing position before removing necessary CRT support located on bottom right and left. 1) Place the TV set with the CRT face down on a cushion jig.

  • Page 9: Set-Up Adjustments

    KV-BM14M70 RM-W101 SECTION 2 SET-UP ADJUSTMENTS • The following adjustments should be made when a Perform the adjustments in the following order : complete realignment is required or a new picture 1. Beam Landing tube is installed. 2. Convergence 3. Focus Set the controls as follows unless otherwise noted: 4.

  • Page 10: Convergence

    KV-BM14M70 RM-W101 Operation of V.STAT magnet 2-2. CONVERGENCE If the V.Stat magnet is moved in the “A” and “B” arrows, • Before starting this adjustment, adjust the focus, the red, green and blue dots moves as shown below. horizontal size and vertical size.
  • Page 11 KV-BM14M70 RM-W101 (2) Convergence Rough Adjustment Preparation: • Before starting this adjustment, adjust the horizontal static convergence and the vertical static convergence Insert Correction Plate to DY Pocket ON DY: (Left or Right) YCH Insert YCH VOL on DY Rotate TLV...

  • Page 12: Focus Adjustment

    KV-BM14M70 RM-W101 2-3. FOCUS ADJUSTMENT 2-5. WHITE BALANCE ADJUSTMENT FOCUS adjustment should be completed before the W/B 1. Set to Service Mode (Refer Section 3-1: adjustment: ADJUSTMENTS WITH COMMANDER) 1. Receive digital monoscope pattern. 2. Input white raster signal. 2. Set picture mode: DYNAMIC.

  • Page 13: Circuit Adjustments

    VDSP Detected Stereo Type (Direct Value from CZ_ Stereo_Mode) Needed for Nicam DCXO aligment Purpose S : for Sony A : Aiwa Value of x = 0 - Unknown, 1 - BTSC, 2 - A2, 3 - NICAM, : US/Latin/Taiwan...

  • Page 14: Adjustment Method

    KV-BM14M70 RM-W101 e. OTHER FUNCTION VIA REMOTE COMMANDER 7, - All the data becomes the values in memory. 8, - All user control goes to the standard state. Display, - Service data initialization (Be sure not to use usually.) 2, 5 Select Device or Category 3-2.
  • Page 16 . t i n I e g n c n u n o i t l b a & e e t o e c i r d d s s e n I / l a i t i e u l i a t e ) d e l...
  • Page 24 KV-BM14M70 RM-W101 Data variant depend on models Category Name Model Data (ES5.2D) Data (ES5.2~) WHBL With VM Without VM With VM Without VM With VM Without VM Category Name Model Data With VM Without VM Category No Name Model Table...
  • Page 25 KV-BM14M70 RM-W101 Data variant depend on models Category Name AR21 BT21 HW21 AR14 HW21 BM14/21 series (AV Stereo) series non-3D & BT21 SDSP BBLW BFCT BBHW STRE Category Name Stereo models Non-stereo models SDEC DCXI DCXG DCLH Category Name 14" models 21"...
  • Page 26 KV-BM14M70 RM-W101 ITEM INFORMATION No. OPB1 Item L’ M/N(US) Speed Search KV-BM14M70 SPEED SEARCH (Time of speed search) 00 = disabled (original cycle speed) 01 = 4 time speed from the original 10 = 6 time speed from the original...
  • Page 27 KV-BM14M70 RM-W101 No. OPB4 Item Firmware/ 1 spk Equalizer Surround V-Chip Text SMAT Models KV-BM14M70 Firmware (SSD Firmware Downloading) 0 = disabled, 1 = enabled SMAT Surround Matrix 0 = Active, 1 = Passive 1 spk Models 1 Speaker Models...
  • Page 28 KV-BM14M70 RM-W101 No. OPB6 Item Feature 1 OSD Language Selection GA US Latin Feature 2 KV-BM14M70 GA US (US Model Destination) 0 = US/CANADA/Latin 1 = Taiwan/Korea/Philippine (Wake-up timer enable) (GA Surround Spec:OFF, SIMULATED, SRS) Latin (US Model Latin Destination)

  • Page 29: Picture Quality Adjustments

    KV-BM14M70 RM-W101 3-3. PICTURE QUALITY ADJUSTMENTS SUB HUE ADJUSTMENT PMX/CONTRAST ADJUSTMENT 1. Select Video. 2. Input a NTSC 3.58 Color Bar to TV set. 1. Select Video Mode. 3. Set the following condition: 2. Input PAL CB to TV set.

  • Page 30: Drive Adjustment

    KV-BM14M70 RM-W101 WIDE MODE (50Hz) WIDE MODE (60Hz) (V-Compression Adjustment) (V-Compression Adjustment) 1. Input SPCB signal. 1. Input mono scope signal. 2. Adjust condition change to WIDE MODE : ON 2. Adjust condition change to WIDE MODE : ON , then [MUTE] + 3.

  • Page 31: Picture Distortion Adjustment

    KV-BM14M70 RM-W101 V. LINEARITY (VLIN), V. CORRECTION (SCOR), PIN 3-6. PICTURE DISTORTION ADJUSTMENT AMP (EWPW), AND HORIZONTAL TRAPEZOID H. CENTER ADJUSTMENT (HPOS) (EWTZ) ADJUSTMENTS 1. Input Monoscope signal. 1. Input Monoscope signal. 2. Activate the Service Adjustment Mode. 2. Activate the Service Adjustment Mode.

  • Page 33: Circuit Boards Location

    KV-BM14M70 RM-W101 4-2. CIRCUIT BOARDS LOCATION C Board A Board 4-3. SCHEMATIC DIAGRAM INFORMATION Note: Reference information All capacitors are in µF unless otherwise noted. • RESISTOR : RN METAL FILM • All electrolytic capacitors are rated at 50V unless otherwise...

  • Page 34: A Board - Processor (Block A)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-1. A Board — Processor (Block A) CN007 TO A BOARD CN009 (JACK) CN905 CN003 CN004 TO C BOARD TO C BOARD CN711 CN701 C005 C006 U IN R377 CHIP PROCESSOR (BLOCK A) D066 3.3V GP08D R394 4.7k...

  • Page 35: A Board - Audio (Block B)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-2. A Board — Audio (Block B) CN201 J201 J200 J202 CN200 CN202 177078513 TO J BOARD CN3400 R238 CHIP R239 R237 CHIP CHIP AUDIO C235 C234 (BLOCK B) 470p CHIP R233 CHIP C217 FPRD C223...

  • Page 36: A Board - Power Supply (Block C)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-3. A Board — Power Supply (Block C) C672 0.01 C675 3.3V 3.3V (C1) To A3,D18 C641 POWER SUPPLY IC606 (BLOCK C) BA033T D635 3.3V REG PDZ3.6B-115 1.8V_MAIN (C2) To A49 JW1665 C685 C662 17.5 IC607...

  • Page 37: A Board - Deflection (Block D)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-4. A Board — Deflection (Block D) R305 CHIP DEFLECTION C078 R307 IC804 R300 16 16 17 17 2.2M STV9302A (BLOCK D) CHIP CHIP V-OUT CHIP To A66 (D19) PH2LF R881 T801 T802 NX-4450//M3A4 6.8k R303 CHIP 2.2M...

  • Page 38: A Board - Tuner (Block E)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-5. A Board — Tuner (Block E) SWF103 SWF101 O SWF FILTER SURFACE WAVE TU102 SWF100 TUNER (TEDE9) 178104211 (BLOCK E) FILTER SURFACE WAVE C138 R112 0.01 6.8K D102 B:CHIP CHIP JR1100 R106 L101 4.7K CHIP...

  • Page 39: A Board - Jack (Block F)

    KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 4-3-6. A Board — Jack (Block F) CN903 CN904 JR1903 C966 CHIP To E17 (F30) TU-AGC L902 To A63 (F29) B_INT R9031 47uH To A62 (F28) B_DAT R9028 CHIP JACK To A64 (F27) B_CLK CHIP C956...

  • Page 41: Voltage Measurement And Waveforms

    KV-BM14M70 RM-W101 4-4. VOLTAGE MEASUREMENT AND WAVEFORMS A BOARD VOLTAGE LIST AND WAVEFORM Pin No. Voltage[v] Pin No. Voltage[v] Pin No. Voltage[v] IC001 2.160V 1.560V NTSC (103.5)[128.1] 2.040V (2.4)[2.5] (1.5)[1.9] (4.9)[4.2] (1.9)[1.4] (2.2)[1.9] 1.380V (3.2)[2.8] 1.300V 1.460V NTSC 324.0mV 1.680V 1.840V...
  • Page 42 KV-BM14M70 RM-W101 A BOARD VOLTAGE LIST AND WAVEFORM Pin No. Voltage[v] Pin No. Voltage[v] Pin No. Voltage[v] Q100 (2.9)[3.1] (2.4)[0] IC802 (4.5)[4.4] Q101 Q102 IC002 (4.4)[4.9] (7.6)[8.6] Q103 (0)[3.2] (3.3)[1.0] IC003 IC803 (0)[34.7] Q104 (3.1)[10.6] (38.3)[5.2] (3.6)[3.4] Q105 (3.6)[3.4] 130.1...
  • Page 43 KV-BM14M70 RM-W101 A BOARD VOLTAGE LIST AND WAVEFORM Pin No. Voltage[v] Pin No. Voltage[v] Pin No. Voltage[v] Q804 136.0 Q809 Q911 (7.7)[8.9] 136.0 (3.6)[4.2] Q805 (-71.1)[-70.9] Q810 Q912 (82.4)[74.5] 140.3 Q814 (44.2)[22.3] Q8009 (195.4)[195.0] (4.2)[4.9] (195.7)[195.3] (122.1)[142.5] (196.0)[195.7] Q816 (0)[5.8] Q8010 (0.5)[0]...

  • Page 44: Printed Wiring Boards And Parts Location

    KV-BM14M70 RM-W101 4-5. PRINTED WIRING BOARDS AND PARTS LOCATION PRINTED WIRING BOARDS [VIDEO AMP] – C Board – A703 A705 CN701 C754 CN704 CN703 R775 C752 R780 R781 R752 C790 R784 R776 G1-1 L780 R785 C759 G1-2 R786 Q701 EY706...
  • Page 45 KV-BM14M70 KV-BM14M70 RM-W101 RM-W101 NOTE: PRINTED WIRING BOARDS The circuit indicated at left contains high voltage of over 1220 Vp-p. Please pay attention when inspecting or repairing it to prevent an electric shock. [Processor, Audio, Power Supply, Deflection, Tuner, Jack ] –...

  • Page 46: Semiconductors

    KV-BM14M70 RM-W101 4-6. SEMICONDUCTORS DIODE CATHODE CATHODE ANODE ANODE (GRN) ANODE CATHODE (GRN) CATHODE ANODE ANODE HSS82-TJ AM01AV1 MMDL914T1 BY228/A52A SPB-25MVWF D3SB60F3 D1NL20U MTZJ-T-77-15 PDZ3-6B-115 D3S6M-F RD5.1ESB2 UPC574J EGP20G EL1Z 1SS133T-77 GP08D RU4AM-T3 S3L20UF4 10ERB20-TA2B5 10ERB20-TB3 11EQS10-TB5 TRANSISTOR ANODE CATHODE...
  • Page 47 KV-BM14M70 RM-W101 TOP VIEW STR-F6267S-LF1357 TDA11010H/ N1B000PN – 53 –...

  • Page 48: Exploded Views

    KV-BM14M70 RM-W101 SECTION 5 EXPLODED VIEWS NOTE: • • Items marked " ∗ " are not stocked since Items with no part number and no The components identified by description are not stocked because they are seldom required for routine...

  • Page 49: Electrical Parts List

    KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. SECTION 6 Replace only with part number specified. ELECTRICAL PARTS LIST REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK • Items marked " ∗ " are not stocked since •...
  • Page 50 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK C234 1-164-315-11 CERAMIC CHIP 470PF C670 ! 1-127-942-51...
  • Page 51 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK C917 1-164-315-11 CERAMIC CHIP 470PF D202 8-719-081-97 DIODE MMDL914T1...
  • Page 52 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK <FUSE> JR037 1-216-864-11 SHORT CHIP JR038 1-216-864-11 SHORT CHIP...
  • Page 53 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK <IC LINK> R029 1-216-809-11 METAL CHIP 1/10W R030...
  • Page 54 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK R300 1-216-809-11 METAL CHIP 1/10W R623 1-218-877-11 METAL CHIP 0.50%...
  • Page 55 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK R877 1-218-895-11 METAL CHIP 100K 0.50% 1/10W R9051...
  • Page 56 KV-BM14M70 RM-W101 The components identified by shading and mark ! are critical for safety. Replace only with part number specified. REF NO. PART NO. DESCRIPTION REMARK REF NO. PART NO. DESCRIPTION REMARK C751 1-107-961-91 ELECT 10UF 250V R757 1-219-746-11 METAL...
  • Page 57 SUBJECT : R827 PART NUMBER CHANGE SECTION 6. ELECTRICAL PARTS LIST (see page 60) REF NO. PART NO. DESCRIPTION REMARK R827 1-243-542-71 RESISTOR, OXIDE METAL FILM 1.5 Sony Corporation Sony EMCS (Malaysia) Sdn. Bhd. English  9-872-430-02 Visual Products 2004.6 – 63 –...

  • Page 58: Operating Instructions

    • Before operating the unit, please read this manual thoroughly and retain it for future reference. Mode d’emploi • Avant de faire fonctionner cet appareil, lisez attentivement le présent mode d’ emploi et conservez-le pour toute référence ultérieure. • • KV-BT21 KV-BM14 © 2003 Sony Corporation...
  • Page 59 WARNING • Dangerously high voltages are present inside the TV. • TV operating voltage: 110 – 240 V AC. • Do not plug in the power cord until you have completed making all other connections; otherwise a minimum leakage current might flow through the antenna and other terminals to ground.
  • Page 60 Do not plug in too many appliances to the same To prevent fire or shock hazard, do not expose the power socket. Do not damage the power cord. TV to rain or moisture. Pull the power cord out by the plug. Do not pull the power cord itself.

  • Page 61: Securing The Tv

    x Securing the TV KV-BT21M81/BT21M80 only To prevent the TV from falling, use the supplied screws, clamps and band to secure the TV. 20 mm 3.8 mm screws clamps band Screw the band to the TV stand and to the provided hole at the rear of your TV.
  • Page 62 Table of Contents Installation Additional Information Connecting optional components ... 21 Getting Started ........6 Setting up your TV Troubleshooting ......... 22 (“Initial Setup”) ........7 Specifications ...... Back cover Overview of Controls TV top control, front and rear panels ............. 8 Using the remote control and basic functions ........

  • Page 63: Installation

    Installation x Getting Started Step 1 Insert the batteries (supplied) into the remote. Note • Do not use old or different types of batteries together. Step 2 Connect the antenna cable (not supplied) to 8 (antenna input) at the rear of the TV. •...

  • Page 64: Setting Up Your Tv ("Initial Setup")

    x Setting up your TV (“Initial Setup”) When you turn on your TV for the first time, the “Initial Setup” menu will appear. You may change the menu language, preset the TV channels automatically and adjust the picture position using the buttons on the top control panel. and V/v/B/b buttons on the remote control can also be used for the •...

  • Page 65: Overview Of Controls

    Overview of Controls TV top control, front and rear panels TV top control panel MENU PROG TV rear panel KV-BM14M70 KV-BT21M81/BT21M80 (MONO) (MONO) (MONO) (MONO) TV front panel KV-BT21M81/BT21M80 KV-BM14M70 (MONO) (MONO) (MONO) Button/Terminal Function Page Turn off or turn on the TV.

  • Page 66: Using The Remote Control And Basic Functions

    Using the remote control and basic functions PROG MENU Button Description Page Turn off temporarily or turn on the TV. – Display the TV program. – Jump to previous program number. – PROG +/– Select program number. – 2 +/– Adjust volume.
  • Page 67 continued Button Description Page Select sound mode options: – (KV-BT21M81/ “Dynamic” (low and high tones), “Drama” BT21M80 only) (voice and high tones), “Soft” (soft, natural and relaxing sound), “Personal”*. * When the “Personal” mode is selected, you can receive the last adjusted sound settings from the “Sound Adjustment”...

  • Page 68: Advanced Operations

    Advanced Operations x Viewing Teletext KV-BT21M81 only Some TV stations broadcast an information service called Teletext which allows you to receive various information, such as stock market reports and news. You can use the buttons on the remote to view Teletext. Do this display a Teletext Press...

  • Page 69: Menu Adjustment

    Menu Adjustment x Introducing the menu system The MENU button lets you open a menu and change the settings of your TV. The following is an overview of the menu system. Return icon Picture icon Name of the current Sound icon Setup menu Language:...
  • Page 70 Level 1 Level 2 Level 3/Function Page Set TV to turn off automatically. “Timer” “Sleep Timer” Set TV to turn on automatically. “Wake Up Timer” Preset channels automatically. “Channel Setup” “Auto Program” Preset channels manually. “Manual Program” Select the TV system: “TV System”...
  • Page 71 continued How to use the menu PROG Picture Press MENU to Mode: Dynamic display the menu. Picture Adjustment Color Temperature: Cool Intelligent Picture: MENU Select Confirm Press V or v to select the desired item. Channel Setup Auto Program Manual Program TV System: Program Label Program Block...

  • Page 72: Changing The "Picture" Setting

    x Changing the “Picture” setting The “Picture” menu allows you to adjust the picture settings. Press MENU. Make sure the “Picture” icon ( ) is Picture Mode: Dynamic selected, then press Picture Adjustment Color Temperature: Cool Intelligent Picture: Select Confirm Press V or v to select the desired item (e.g., “Mode”), then press Select “Mode”...

  • Page 73: Changing The "Sound" Setting

    x Changing the “Sound” setting The “Sound” menu allows you to adjust the sound settings. Press MENU. Press V or v to select the “Sound” Sound Mode: Dynamic icon ( ), then press Sound Adjustment Balance Intelligent Volume: Surround: Select Confirm Press V or v to select the desired item (e.g., “Mode”), then press Select...

  • Page 74: Changing The "Timer" Setting

    x Changing the “Timer” setting The “Timer” menu allows you to set TV to turn off and turn on automatically. Press MENU. Press V or v to select the “Timer” icon ( ), Timer Sleep Timer: then press Wake Up Timer: Select Confirm Press V or v to select the desired item (e.g., “Sleep Timer”), then press...

  • Page 75: Changing The "Channel Setup" Setting

    x Changing the “Channel Setup” setting The “Channel Setup” menu allows you to preset channels automatically, manually preset channels, select the TV system, label the program number and block unwanted programs. Press MENU. Press V or v to select the “Channel Setup” Channel Setup icon ( ), then press...

  • Page 76: Presetting Channels Manually

    Presetting channels manually After selecting “Manual Program”, select the program number to which you want to preset a channel. Manual Program Program: TV System: (1) Make sure “Program” is selected, then press VHF Low Fine: Auto (2) Press V or v until the program number you want Skip: to preset appears on the menu, then press Select...

  • Page 77: Changing The "Setup" Setting

    x Changing the “Setup” setting The “Setup” menu allows you to change the menu language, adjust the picture position, label the connected equipment and select the color system. Press MENU. Press V or v to select the “Setup” icon Setup Language: English Picture Rotation...

  • Page 78: Additional Information

    (not supplied) (MONO) * Sound Mix Terminal (KV-BM14M70 only) You can connect the audio L and R jacks from your AV equipment to both (MONO) jacks on the TV to enjoy mixed left and right sound. If you do not prefer the mixed sound, disconnect either one of the (MONO) jacks.

  • Page 79: Troubleshooting

    Troubleshooting If you find any problem while viewing your TV, please check the following guide. If any problem persists, contact your Sony dealer. Troubleshooting guide Symptom Possible cause Solutions Page Snowy picture • The connection is loose • Check the antenna cable and connection or the cable is on the TV, VCR and at the wall.
  • Page 80 • There is local equipment near the TV. stripes interference from cars, neon signs, hair dryers, • Check the antenna setup. Contact a Sony – power generators, etc. dealer for advice. • Use a highly directional antenna. Double images or •...
  • Page 81 (snowy on the TV, VCR, and at the wall. picture or double – • The antenna setup is • Check the antenna setup. Contact a Sony images). inappropriate. (KV-BT21M81 only) dealer for advice. – • Signal transmission •...

  • Page 82: Specifications

    Phono jacks; 500 mVrms i (Headphone) Output: 1 Stereo minijack KV-BT21M81/ BT21M80 only (Earphone) Output: 1 Monaural minijack KV-BM14M70 only 21 in. 14 in. Picture tube Measured diagonally Tube size (cm) Measured diagonally Screen size (cm) 497 × 461 × 487 374 ×...

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Trinitron kv-bm14m70Kv-bm14m70

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