SonyメーカーTRINITRON KV-PF21M70の使用説明書/サービス説明書
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KV -PF21M70 RM-952 Hong Kong SCC-U17H-A KV -TF21M61 RM-952 Singapore SCC-U29A-A KV -TF21M90 RM-952 Hong Kong SCC-U17G-A KV -TF21P11 RM-952 OCE SCC-U24C-A MODEL COMMANDER DEST .
– 2 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SPECIFICA TIONS CAUTION SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE MET AL CHASSIS, CRT SHIELD, OR CARBON P AINTED ON THE CRT , AFTER REMO VING THE ANODE.
– 3 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 T ABLE OF CONTENTS Section T itle P age SELF DIAGNOSIS FUNCTION ................................ 3 1. GENERAL .......................................................... 8 2. DISASSEMBL Y 2-1. Rear Cover Remo val .
– 4 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 The units in this manual contain a self-diagnostic function. If an error occurs, the ST ANDBY/TIMER lamp will automatically begin to flash. The number of times the lamp flashes translates to a probable source of the problem.
– 5 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 2. DISPLA Y OF ST ANDBY/TIMER LIGHT FLASH COUNT Diagnostic Item Flash Count* +B overcurrent/overvoltage 2 times Vertical deflection stopped White balance failure 5 times * One flash count is not used for self-diagnostic.
– 6 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 4. SELF-DIA GNOSTIC SCREEN DISPLA Y For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot.
– 7 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 6. SELF-DIA GNOSTIC CIRCUIT [+BovercurrentªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON and the voltage to pin 18 of IC301 should go down when V .
– 8 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SECTION 1 GENERAL (KV-PF21M70) The operating instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.
– 9 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 5 Using Y our New TV Using Y our New TV Preset the channels automatically Tips • If you want to stop automatic channel presetting, press SELECT twice. • If your TV has preset an unwanted channel or cannot preset a particular channel, then preset your TV manually (see page 9).
– 10 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 8 Using Y our New TV Presetting channels Y ou can preset up to 100 TV channels in numerical sequence from program number 1 using the remote and the buttons on your TV as well. Presetting channels automatically 1 Press U to turn on the TV .
– 11 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 9 Using Y our New TV Using Y our New TV Presetting channels manually 1 Press SELECT until “MANUAL PROGRAM” appears. 2 Press + or –. 3 Press PROGR +/– or the number buttons until the desired program number appears.
– 12 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 12 Using Y our New TV To T urn off temporarily T urn off completely Mute the sound W atch the video input (VCR, camcorder , etc.) Jump back to the previous channel Display the on-screen information* Adjust the volume of each TV program automatically Do this Press u .
– 13 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 13 Using Y our New TV Using Y our New TV Setting the W ake Up timer 1 Press until the desired period of time appears. 2 Select the TV program or video mode you want to display when you wake up. 3 Press u or set the Sleep timer if you want the TV to turn off automatically .
– 14 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 16 Advanced Operations Blocking the channels (CHILD LOCK) Y ou can prevent a child fr om watching certain programs by using the buttons on the remote control. 1 Select the TV program you want to lock.
– 15 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 17 Additional Information Additional Information Self-diagnosis function Y our TV is equipped with a self-diagnosis function. If there is a problem with your TV , the u indicator flashes red. The number of times the u indicator flashes indicates the possible causes.
– 16 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 19 Additional Information Possible cause Symptom Solutions continued Good picture No sound Dotted lines or stripes Double images or “ghosts” N o color Abnormal color patches • Press ¸ + to increase the volume level.
– 17 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 21 Additional Information Identifying parts and controls Refer to the pages indicated in parentheses ( ) for details.
– 18 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 2 WARNING • Dangerously high voltages are pr esent inside the TV . • Operate the TV only between 1 10 – 240 V AC. To prevent fire or shock hazard, do not expose the TV to rain or moisture. Do not operate the TV if any liquid or solid object falls into it.
– 19 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 5 Using Y our New TV Using Y our New TV Preset the channels automatically Tips • If you want to stop automatic channel presetting, press SELECT twice. • If your TV has preset an unwanted channel or cannot preset a particular channel, then preset your TV manually (see page 9).
– 20 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 7 Using Y our New TV Using Y our New TV Securing the TV T o prevent the TV fr om falling, secure the TV using one of the following methods: A With the supplied screws, attach the band to the TV stand and to the rear of the TV using the provided hole.
– 21 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 9 Using Y our New TV Using Y our New TV or 1 2 3 4 5 6 7 8 0 -/-- 9 PROGR Presetting channels manually 1 Press SELECT until “MANUAL PROGRAM” appears. 2 Press + or –. 3 Press PROGR +/– or the number buttons until the desired program number appears.
– 22 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 11 Using Y our New TV Using Y our New TV W atching the TV This section explains functions used while watching the TV .
– 23 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 13 Using Y our New TV Using Y our New TV Setting the W ake Up timer 1 Press until the desired period of time appears. 2 Select the TV program or video mode you want to display when you wake up. 3 Press u or set the Sleep timer if you want the TV to turn off automatically .
– 24 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 15 Advanced Operations Advanced Operations Adjusting the picture and sound settings 1 Press SELECT until the desired setting appears. Each time you press SELECT , the setting item will change as follows: 2 Press + or – to adjust the item.
– 25 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 17 Advanced Operations Advanced Operations TV SOUND MODE FAVORITE PROGR Á Broadcasting On-screen display (Selected sound) NICAM stereo NICAM bili.
– 26 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 19 Advanced Operations Advanced Operations Viewing T eletext (KV-TF21M61 only) TV stations broadcast an information service called T eletext via some TV channels. T eletext allows you to receive various information, such as shares market or news.
– 27 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 21 Additional Information Additional Information Self-diagnosis function Y our TV is equipped with a self-diagnosis function. If there is a problem with your TV , the u indicator flashes red. The number of times the u indicator flashes indicates the possible causes.
– 28 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 22 Additional Information Co • Snowy • Distorted • Noisy/ picture picture distorted sound Wall antenna terminal UHF VHF Booster VCR Check the antenna direction. Incorrect antenna direction may cause: Check the antenna type.
– 29 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 24 Additional Information Snowy picture Noisy sound Distorted picture Noisy sound Good picture Noisy sound No picture No sound T roubleshooting If you find any problem while viewing your TV , please check the following guide.
– 30 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 27 Additional Information Identifying parts and controls Refer to the pages indicated in parentheses ( ) for details.
– 31 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 28 Additional Information Remote Control 9 !º !¡ !™ !£ !¢ !∞ !§ TV 1 2 3 4 6 7 8 9 ÷ 0 5 JUMP SOUND MODE FAVORITE PROGR SELECT p PIC .
– 32 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SECTION 1-3 GENERAL- (KV-TF21P11) The operating instructions mentioned here are partial abstracts from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.
– 33 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 5 Using Y our New TV Using Y our New TV Preset the channels automatically Tips • If you want to stop automatic channel presetting, press SELECT twice. • If your TV has preset an unwanted channel or cannot preset a particular channel, then preset your TV manually (see page 9).
– 34 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 8 Using Y our New TV Presetting channels Y ou can preset up to 100 TV channels in numerical sequence from program number 1 using the remote and the buttons on your TV as well. Presetting channels automatically 1 Press U to turn on the TV .
– 35 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 9 Using Y our New TV Using Y our New TV or Presetting channels manually 1 Press SELECT until “MANUAL PROGRAM” appears. 2 Press + or –. 3 Press PROGR +/– or the number buttons until the desired program number appears.
– 36 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 12 Using Y our New TV To T urn off temporarily T urn off completely Mute the sound W atch the video input (VCR, camcorder , etc.
– 37 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 13 Using Y our New TV Using Y our New TV Setting the W ake Up timer 1 Press until the desired period of time appears. 2 Select the TV program or video mode you want to display when you wake up. 3 Press u or set the Sleep timer if you want the TV to turn off automatically .
– 38 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 16 Advanced Operations Blocking the channels (CHILD LOCK) Y ou can prevent a child fr om watching certain programs by using the buttons on the remote control. 1 Select the TV program you want to lock.
– 39 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 17 Advanced Operations Advanced Operations Viewing T eletext TV stations broadcast an information service called T eletext via some TV channels. T eletext allows you to receive various information, such as shares market or news.
– 40 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 19 Additional Information Additional Information Self-diagnosis function Y our TV is equipped with a self-diagnosis function. If there is a problem with your TV , the u indicator flashes red. The number of times the u indicator flashes indicates the possible causes.
– 41 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 21 Additional Information Possible cause Symptom Solutions continued Good picture No sound Dotted lines or stripes Double images or “ghosts” N o color Abnormal color patches • Press ¸ + to increase the volume level.
– 42 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 23 Additional Information Identifying parts and controls Refer to the pages indicated in parentheses ( ) for details.
– 43 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SECTION 2 DISASSEMBL Y 2-2. CHASSIS ASSY REMO V AL 1 Chassis assy Lever Lever 2-1. REAR CO VER REMO V AL Six screws (BVTP 4 × 16) Rear cover 1 2 Two screws (BVTP 4 × 16) 2-3.
– 44 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 2-6. TERMINAL BRA CKET REMOV AL A board Terminal board bracket 2-5. REPLA CEMENT OF P AR TS For replacement of the Multi Button and Bar Optical ,unscrew to exchange with the new parts, and fix them with screws (+BVTP) respectively .
– 45 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 2-8. PICTURE TUBE REMO V AL NOTE : The picture tube for OCE model is upside down, and the positon for the anode cap and tension springs are changed accordingly .
– 46 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 • REMOV AL OF ANODE-CAP NOTE : After removing the anode, short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the CRT . • REMOVING PROCEDURES 1 Do not damage the surface of anode-caps with sharp shaped objects.
– 47 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 • The following adjustments should be made when a complete realignment is required or a new picture tube is installed. • These adjustments should be performed with rated power supply voltage unless otherwise noted.
– 48 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 3-2. CONVERGENCE Preparation : • Before starting this adjustment, adjust the focus, horizontal size and ver tical size . • Minimize the brightness setting. • Pr ovide dot pattern. (1) Horiz ontal and V er tical Sta tic Conver gence (Moving verticall y), adjust the V .
– 49 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 (3) Screen-corner Con vergence ba cd a-d : screen-corner misconvergence a d c b a to d : Permalloy assembly Fix a Permalloy assy corresponding to .
– 50 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 3-3. FOCUS ADJUSTMENT Adjust FOCUS control on the flyback transformer for the best focus. FL YBACK TRANSFORMER (T503) 2. WHITE B ALANCE ADJUSTMENT 1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS WITH COMMANDER).
– 51 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SECTION 4 CIRCUIT ADJUSTMENTS W ith the unit on standby ↓ [DISPLA Y] ↓ 5 ↓ VOL (+) ↓ [POWER] This operation sequence puts the unit into service mode. 4-1. ADJUSTMENTS WITH COMMANDER Service adjustments are made with the RM-952 that comes with this unit.
– 52 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 4-2. ADJUSTMENT METHOD Item Number 00 of de vice GEO This explanation uses H-Position as an e xample. 1. Select “GEO 00 HPS” with the 1 and 4 buttons. 2. Raise/lower the data with the 3 and 6 buttons.
– 53 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 Adjustment Item T able Device Functionality Note Data Range Function Note for Register Slava RAM Address Name No Name Different Data No.
– 54 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 Adjustment Item T able Device Functionality Note Data Range Function Note for Register Slava RAM Address Name No Name Different Data No.
– 55 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 Adjustment Item T able Device Functionality Note Data Range Function Note for Register Slava RAM Address Name No Name Different Data No.
– 56 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 A V Input Item KV -PF21M70 KV -TF21M61 KV -PF21M90 KV -PF21P1 1 M 1 1 1 0 D/K 1 1 1 0 I 1 1 1 0 B/G 1 1 1 1 2nd. Lang 1 1 1 1 SECAM 1 1 1 0 XT AL 3.58 1 1 1 1 XT AL 4.43 1 1 1 1 ITEM INFORMA TION. No.
– 57 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SUB HUE ADJUSTMENT 1. Select V ideo 1. 2. Input a NTSC color-bar, video into V ideo 1. 3. Set the follo wing condition: PICTURE 100%, BRIGHTNESS 50%, COLO R 50% 4. Connect an oscilloscope to pin 1 (B OUT) of CN305, A board.
– 58 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 4-5. PICTURE DIST ORTION ADJUSTMENT Item Number 00 – 0B GEO 0 HSH (H POSITION) GEO 1 HSZ (H SIZE) GEO 2 PAP (PIN AMP) GEO 5 VSZ (V SIZE) GEO 7 VLN (V LINEARITY) GEO 4 VSH (V POSITION) GEO 6 SCR (VERTICAL S-Correction) GEO 8 VBOW (AFC.
SECTION 5 DIA GRAM 5-1. BLOCK DIAGRAM – 60 – – 61 – – 59 – YC JUNGLE IC301 CXA2130S <slave:88H> MONITOR OUT TV V in TV L in TV R in Mon out TV V in V1 V in 43 6 12 V1 V in V1 L in *V.
– 65 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 5-4. SCHEMA TIC DIA GRAMS AND PRINTED WIRING BO ARDS Note: • All capacitors are in µ F unless otherwise noted. • All electrolytic capacitors are rated at 50V unless otherwise noted. • All resistors are in ohms.
– 66 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 5 8 2 6 2 2 3 8 8 8 INT0 INT1 INT2 TEX TX EXTAL XTAL RST MP V DD V SS RMC AN0~AN5 6 PA0~PA7 PORT A PORT B PORT C PORT D PORT E PORT F PORT G PB0~P.
KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 – 90 – – 91 – – 92 – KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 TRANSISTOR UN2111 UN2211 UN2213 DTC114.
KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 SECTION 6 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 indicated with a collation number in the remark column.
KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 6-2. CHASSIS (KV -TF21M61/TF21M90/TF21P11) [ : BVTP 3 × 12 7-685-648-79 L : BVTP 4 × 16 7-685-663-71 NOTE : The picture tube for OCE model is upside down, and the position anode cap and tension springs are changed accordingly .
– 97 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 98 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified. KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 C259 1-126-933-11 ELECT 100MF 20% 16V C265 1-164-505-11 CERAMIC CHIP 2.
– 99 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified. REF . NO . P AR T NO. DESCRIPTION REMARK KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 C630 1-123-024-21 ELECT 33MF 160V C633 1-104-999-11 MYLAR 0.
– 100 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified. KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 D901 8-719-069-60 DIODE UDZS-TE17-9.
– 101 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified. REF . NO . P AR T NO. DESCRIPTION REMARK KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 <IC LINK> PS200 1-532-675-21 LINK, IC 1.
– 102 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 103 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 104 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 105 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified. REF . NO . P AR T NO. DESCRIPTION REMARK KV -PF21M70/TF21M61/TF21M90/TF21P11 RM-952 C248 1-163-010-11 CERAMIC CHIP 0.
– 106 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 107 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 108 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 109 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 110 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 111 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 112 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 113 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 114 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
– 115 – REF . NO . P ART NO. DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety . Replace only with part number specified.
– 116 – REF . NO. P AR T NO. DESCRIPTION REMARK REF . NO . P AR T NO . DESCRIPTION REMARK The components identified by shading and mark ! are critical for safety .
デバイスSony TRINITRON KV-PF21M70の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Sony TRINITRON KV-PF21M70をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはSony TRINITRON KV-PF21M70の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Sony TRINITRON KV-PF21M70の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Sony TRINITRON KV-PF21M70で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Sony TRINITRON KV-PF21M70を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はSony TRINITRON KV-PF21M70の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Sony TRINITRON KV-PF21M70に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちSony TRINITRON KV-PF21M70デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
