Sony KDL-50R550A User manual

SERVICE MANUAL
Version Date Subject
1.0 3/2013 Original manual issue.
2.0 4/2013 Added the part to stick on LCD panel.(P.17, P.23)
2.1 5/2013 A mounted circuit board added.(P.19)
LCD Digital Color TV
9-888-526-03
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 3/2013 RB1FKCHASSIS
Segment: BL

SERVICE MANUAL
LCD Digital Color TV
9-888-526-01
RB1FKCHASSIS
Segment: BL

KDL-50R550A/556A, 60R520A/550A, 70R550A(CH) 3
MODEL LIST
MODEL COLOR COMMANDER DEST.
MODEL COLOR COMMANDER DEST.
KDL-50R550A Black RM-SD021 CHINA
KDL-50R556A Black RM-SD021 CHINA
KDL-60R520A Black RM-SD022 CHINA
KDL-60R550A Black RM-SD021 CHINA
KDL-70R550A Black RM-SD021 CHINA

KDL-42/47R500A(CH) 4
䄺Ϣ⊼ᛣџ乍
(WARNINGS AND CAUTIONS)
⊼ᛣ
(CAUTION)
㓈ׂՓ⫼䇈ᯢҙ䰤Ѣ᳝䌘䋼ⱘ㓈ׂҎՓ⫼DŽ
These servicing instructions are for use by qualified service personnel only.
Ў䰡Ԣ㾺⬉ⱘ亢䰽ˈ䇋ϡ㽕䖯㸠Փ⫼䇈ᯢкݙᆍҹ໪ⱘẔׂˈ䰸䴲Դৃҹ㚰ӏDŽ
To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.
䄺
!! (WARNING)
Ẕׂᯊ䇋ࡵᖙՓ⫼䱨⾏ব఼ˈҹ䙓ܡ಴ᴎ໇ᏺ⬉ᓩ䍋㾺⬉DŽ
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis.
᥹ᬊ఼ᴎ໇Ⳉ᥹䖲᥹೼Ѹ⌕⬉⑤㒓ϞDŽ
The chassis of this receiver is directly connected to the ac power line.
⬉㾚ᴎ䖤䕧
(CARRYING THE TV)
ࡵᖙ䙉ᕾ䖭ѯᣛᇐᴹֱᡸԴⱘ䋶ѻ䙓ܡ䗴៤Ϲ䞡ӸᆇDŽ
Be sure to follow these guidelines to protect your property and avoid causing serious injury.
•䖤䗕⬉㾚ᴎ䳔㽕䎇໳ⱘҎ᠟˗໻ሎᇌⱘ⬉㾚ᴎ䳔㽕ϸҎ៪᳈໮ⱘҎ
• Carry the TV with an adequate number of people; larger size TVs require two or more people.
• ᨀ䖤ᯊᡞ᠟ᬒ㕂೼ℷ⹂ⱘԡ㕂ᇍ⬉㾚ᴎⱘᅝܼঞ䙓ܡᤳണᰃ䴲ᐌ䞡㽕ⱘDŽ
• Correct hand placement while carrying the TV is very important for safety and to avoid damages.
Ⳍ݇ᅝܼ䚼ӊ䄺
!! (AFETY-RELATED COMPONENT WARNING)
೼⼎ᛣ೒,ߚ㾷೒,䳊ӊ⏙Ϟ⫼䰈ᕅ󰵼䆚ⱘ䚼ӊᇍᅝܼ᪡԰ᕜ݇䬂.⫼ᴀ᠟ݠ៪SONY๲㸹᠟ݠϞߎ⦄䳊ӊোⷕⱘ䳊ӊᴹ᳓ᤶ䖭ѯ䚼ӊDŽ
᮴䆎ԩᯊˈ᳓ᤶ݇䬂䚼ӊ៪ߎ⦄⭥Ԑϡℷ⹂᪡԰ᯊˈ䛑㽕䙉ᕾᴀ⌕⿟DŽ
Components identified by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe operation. Replace these components with Sony
parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit adjustments that are critical for safe operation are identified in this manual.
Follow these procedures whenever critical components are replaced or improper operation is suspected.

KDL-42/47R500A(CH) 5
ᨀ䖤⎆᱊ᰒ⼎ሣᯊ䇋ࡵᖙᇣᖗ
USE CAUTION WHEN HANDLING THE LCD PANEL
ׂ⧚⎆᱊ᰒ⼎ሣᯊˈ䇋ࡵᖙԽ᠈䴭⬉᠟⦃DŽ
When repairing the LCD panel, be sure you are grounded by using a wrist band.
ׂ⧚ᣖຕ⎆᱊ᰒ⼎ሣᯊˈ⎆᱊ᰒ⼎ሣᖙ䳔⫼ৢⲪϞⱘ4Ͼ೎ᅮᄨֱᡸDŽ
When repairing the LCD panel on the wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.
1) ϡ㽕ᣝࠄ⎆᱊ሣ៪䴶Ḛ䖍㓬ҹ䙓ܡ⬉ߏ亢䰽DŽ
Do not press on the panel or frame edge to avoid the risk of electric shock.
2) ϡ㽕⫼ӏԩᇪ䫤⠽ક೼⎆᱊ሣϞࠂ󰩛៪ᣝDŽ
Do not scratch or press on the panel with any sharp objects.
3) ϡ㽕䅽㒘ӊ䭓ᳳ໘೼催⏽៪催⑓ᑺ⦃๗ЁDŽ
Do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
4) ϡ㽕䅽LCD⎆᱊ሣᲈ䴆೼Ⳉᇘ䰇ܝЁDŽ
Do not expose the LCD panel to direct sunlight.
5) 䙓ܡϢ∈᥹㾺DŽᅗৃ㛑ᓩ䍋㒘ӊݙ䚼ⷁ䏃DŽ
Avoid contact with water. It may cause a short circuit within the module.
6) ᔧ᳈ᤶ㚠ܝ♃(ދ䰈ᵕ㤻ܝ♃ㅵ) ៪ 䗚ব఼(䗚ব఼ⱘ催䕧ߎӮ᳝650VrmsDŽ)ᯊˈᮁᓔѸ⌕⬉⑤DŽ
Disconnect the AC power when replacing the backlight (CCFL) or inverter circuit. (High voltage occurs at the inverter circuit at 650Vrms.)
7) 㽕㒣ᐌ⏙⋕⎆᱊ሣⱘ䆱䇋⫼䕃Ꮧᴤ᭭DŽ
Always clean the LCD panel with a soft cloth material.
8) ᔧ໘⧚䗚ব఼ⱘ㒓䏃៪䖲᥹ᯊˈ㽕ᇣᖗDŽ㒓䏃ⱘᤳണৃ㛑ᓩ䍋ⷁ䏃DŽ
Use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
9) ⫼ESDֱᡸ⎆᱊ሣҹܡᤳണ⬉ᄤ⬉䏃 (C-MOS)DŽ
Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10) ೼㓈ׂᳳ䯈ˈLCD ⎆᱊ሣ䴶ᳱϟⱘᚙމϟˈᓎ䆂ϡ㽕Ϟ⬉䍙䖛ϔᇣᯊ៪㗕࣪ᳳ䯈DŽ
It is recommended not to exceed 1 hour of Power-On nor Burn-in period with LCD panel face down condition, in repair activity.
䄺Ϣ⊼ᛣџ乍
(WARNINGS AND CAUTIONS)

KDL-42/47R500A(CH) 6
ᬙ䱰㓈ׂᅠ៤ৢˈ೼ѸҬ㒭⫼᠋ࠡᖙ乏䖯㸠ϟ߫Ẕᶹ˖
Ẕᶹ᠔㓈ׂԡ㕂ᰃ৺䖬᳝Ў⛞᥹៪⛞᥹ϡ㡃ⱘഄᮍDŽẔᶹᭈϾ䴶ᵓ㸼䴶ᰃ৺ᄬ೼ӏԩ⛞⏷៪⛞ḹDŽ
 ẔᶹᵓϞᏗ㒓ˈ⹂ֱ㒓䏃᳾ᡁ㒲೼ϔ䍋៪㗙Ϣ催⪺⡍˄ࡳ⥛˅ⱘ⬉䰏᥹㾺DŽ
 Ẕᶹᰃ৺䳔㽕᳈ᤶ᠔᳝ⱘ᥻ࠊᣝ䪂ˈሣ㬑㒓ˈ໪໇ˈ᥹ഄ㒓ҹঞ೎ᅮ䚼ӊDŽࡵᖙֱ䱰೼᳈ᤶৢᰃ㒱㓬ⱘDŽ
 Ẕᶹ䳔㽕᳈ᤶⱘ䚼ӊˈᇸ݊ᰃ೼ҹᕔ㓈ׂᯊᅝ㺙ⱘ⬉ᄤܗӊDŽℸᯊˈ乏৥⫼᠋䇈ᯢℸᚙމˈᑊᓎ䆂᳈ᤶDŽ
 ᶹᡒ㱑೼䖤㸠ˈԚ݊ᗻ㛑Ꮖᯢᰒ㗕࣪䗍䈵ⱘ䚼ӊDŽℸᯊˈ乏৥⫼᠋䇈ᯢℸᚙމˈᑊᓎ䆂᳈ᤶDŽ
 Ẕᶹ㒓䏃ᰃ৺᳝⸈㺖៪⺼ᤳˈབ᳝߭ᓎ䆂⫼᠋䖯㸠᳈ᤶDŽ
 Ẕᶹ໽㒓ッᄤǃ䞥ሲ㺙佄ᴵǃ䬔䞥ሲⱘᮟ䪂ǃ㶎ϱҹঞ᠔᳝໪䴆ⱘ䞥ሲ䚼ӊᰃ৺ⓣ⬉DŽẔᶹℹ偸খ✻ϟ䴶䇈ᯢ䖯㸠DŽ
 Ўњᅝܼ䍋㾕ˈ⽕ℶׂ໡⬉⑤ᵓϢ䗚ব఼ЁӏᛣϔϾDŽ
ᅝܼẔ⌟
(SAFETY CHECK-OUT)
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges.
Check the inter board wiring to ensure that no wires are “pinched” or touching high-wattage resistors.
Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators.
Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.
Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.
Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.
Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
For safety reasons, repairing the Power board and/or Inverter board is prohibited.

KDL-42/47R500A(CH) 7
ᅝܼẔ⌟
(SAFETY CHECK-OUT)
ⓣ⬉Ẕ⌟
(Leakage Test)Ңӏԩ໪䴆䞥ሲ䚼ߚࠄ᥹ഄˈҹঞҢ᠔᳝໪䴆䞥ሲ䚼ߚࠄ݊Ҫ໪䴆
䚼ߚݡಲࠄᑩᑻП䯈ⱘⓣ⬉ ⬉⌕ϡᕫ䍙䖛 0.5mADŽৃՓ⫼ϟ߫ϝ⾡ᮍ⊩ⱘӏᛣϔϾএẔ⌟ⓣ
⬉˖
The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed
metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. ଚ⫼ẔⓣҾˈ՟བ 6LPSVRQ៪5&$:7$DŽᣝ✻ࠊ䗴ଚⱘᣛᇐ᪡԰Փ⫼DŽ
A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’
instructions to use these instructions.
2. ⬉∴կ⬉ⱘѸ⌕↿ᅝ䅵ˈৃՓ⫼ 'DWD3UHFLVLRQ᭄ᄫ↿ᅝ䅵DŽ
A battery-operated AC milliampmeter. The Data Precision 245 digital multimeter is suitable for this job.
3. Փ⫼920˄ӣ⡍󱂜ྚ䅵˅៪⬉∴կ⬉ⱘѸ⌕ӣ⡍㸼⌟䞣⬉䰏఼䰡DŽĀ䰤ؐāЎ9ˈ಴ℸ῵
ᢳҾ㸼ᖙ䳔݋᳝㊒⹂ⱘԢࠏᑺDŽ6LPSVRQ  6DQZD 6+7UG ഛЎ᮴⬉⑤920䞣㸼ˈߚ
䗖⫼DŽ޴Т᠔᳝⬉∴կ⬉ⱘ᭄ᄫ↿ᅝ䅵䛑݋᳝9ⱘѸ⌕㣗ೈˈ䛑䗖⫼䖯㸠⌟䞣˄བ೒$᠔⼎˅DŽ
Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The
“limit” indication is 0.75 V, so analog meters must have an accurate low voltage scale . The Simpson’s 250
and Sanwa SH-63TRD are examples of passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
ᗢḋᡒࠄϔϾདⱘ᥹ഄ⚍
(How to Find a Good Earth Ground)ދ∈ㅵᰃϔ⾡ֱ᳝䆕ⱘ᥹ഄ䆒໛˗
Ѹ⌕⬉ᦦᑻⲦⲪᵓⱘ೎ԡ㶎ϱৠḋᰃ᥹ഄⱘDŽབᵰ㽕ᡞ೎ԡ 㶎ϱ⫼ᴹ᥹ഄᑨܜ⫼󱂜ྚ㸼⌟䞣
೎ԡ㶎ϱϢދ∈ㅵП䯈ⱘ⬉䰏ˈབᵰ䇏᭄Ў䳊ˈ䆕ᯢℸ೎ԡ 㶎ϱ⹂ᅲᰃ᥹ഄⱘDŽ
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw on most AC outlet boxes is also
at earth ground.
བᵰދ∈ㅵϡᆍᯧ᥹䖥䖲᥹ࠄ⪺ⱘẔׂ♃ϡᰃ䳧㱍♃˅೼ᦦᑻⱘ催⬉ԡջϢ೎ԡ㶎ϱ
П䯈DŽབᵰ᳝ᖙ㽕ⱘ䆱ϸϾᦦῑ䛑䆩䆩ˈҹ⹂ᅮા䖍ᰃ催⬉ԡջDŽབᵰ㶎ϱ೼᥹ഄ⬉ԡϞˈ
䙷М೼ℷᐌⱘᚙމϟ♃ᰃ㛑㹿⚍҂ⱘབ೒%᠔⼎DŽ
If the retaining screw is to be used as your earth ground, verify that it is at ground by measuring the resistance
between it and a cold-water pipe with an ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble- light (not a neon lamp) between the hot
side of the receptacle and the retaining screw. Try both slots, if necessary, to locate the hot side on the line; the
lamp should light at normal brilliance if the screw is at ground potential (see Figure B).

KDL-42/47R500A(CH) 8
㞾䆞ᮁࡳ㛑
(SELF DIAGNOSIS FUNCTION)
೼ᴀ᠟ݠᴀܗЁࣙ৿њ㞾៥䆞ᮁࡳ㛑DŽབᵰߎ⦄ᬙ䱰ˈᕙᴎᣛ⼎♃Ӯ㞾ࡼ䮾⚕DŽ LEDᣛ⼎♃䮾⚕󱂖᭄ᣛ⼎њ䯂乬ⱘᴹ⑤DŽ
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY LED will automatically begin to flash. The number of times the LED flashes translates
to a probable source of the problem.
LEDᣛ⼎♃䮾⚕󱂖᭄᠔ᣛ⼎ⱘ䯂乬㾕Փ⫼䇈ᯢкՓ⫼乏ⶹϢখ㗗䚼ߚDŽབᵰᬙ䱰⢊ᗕϡ㛑䞡⦄ˈৃ⫼䘹᥻఼ಲ乒ݙᄬ䞠ⱘᬙ䱰থ⫳䌘᭭ᴹᶹⳟҹᕔᬙ䱰ঞᬙ䱰乥⥛DŽ
A definition of the STANDBY LED flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the remote
commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.
䆞ᮁ⌟䆩ᣛ󰵼
(DIAGNOSTIC TEST INDICATORS)ᔧᬙ䱰ߎ⦄ᯊˈᕙᴎ/('ᣛ⼎♃ᇚᣝ✻ϔᅮ
ⱘ󱂖᭄䮾⚕ᴹ㸼⼎ৃ㛑ⱘᬙ䱰಴DŽབᵰᬙ䱰䍙䖛ϔϾҹϞ
/('ᇚܜ䆚߿ᬙ䱰㉏߿DŽ䆞ᮁ乍Ⳃⱘ᠔᳝㒧ᵰ䛑Ӯᰒ⼎೼⬠䴶ϞDŽབᵰ⬠䴶ᰒ⼎ЎĀāⱘ䆱ˈ߭᮴ᬙ
䱰ߎ⦄DŽ When an error occurs, the STANDBY LED will flash a set number of times to indicate the
possible cause of the problem . If there is more than one error, the LED will identify the first of the
problem areas. Result for all of the following diagnostic items are displayed on screen.If the screen
displays a “0”, no error has occurred .
ᕙᴎᣛ⼎♃䮾⚕䅵᭄ᰒ⼎
(DISPLAY OF STANDBY LED FLASH COUNT)
㞾䆞ᮁ⬠䴶ᰒ⼎
(SELF-DIAGNOSTIC SCREEN DISPLAY)
՟བĀ᳝ᯊ݇ᴎā៪Ā᳝ᯊሣᐩϡᰒ⼎āˈ䖭ѯ᮴⊩⹂ᅮⱘᬙ䱰⢊ᗕˈ䖭ѯ᳝ৃ㛑Пࠡⱘᬙ䱰Ӯ
೼⬠䴶Ёᰒ⼎ߎᴹ˖
For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that
cannot be confirmed, it is possible to bring up past occurrences of failure for confirmation on the screen:
[
䏇ߎ⌟䆩⬠䴶
][To Bring Up Screen Test]
೼ᕙᴎⱘ⢊ᗕϟˈᣝ✻བϟⱘ乎ᑣᖿ䗳䖲㓁ⱘᣝ䘹᥻఼Ϟⱘᣝ䬂˖
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:
-
  䇋⊼ᛣ䖭䞠䳔㽕߿Ѣ䖯ܹ㓈ׂ῵ᓣ䷇䞣 
ሣ ᰒ ⬉㾚⬉⑤
乥 䘧 ䷇ 䞣
5*
 
*
STBYLED
Flash time
"%!( )
Service menu Item name
(Screen Display)
$&(
Diagnostic Item Description
2 MAIN_POWER 12V_Detectpower board 12V. (V_DROP_DET)
TUNER_ERR Notused
AUDIO_PROT )'_Detect Audio Speaker Error.
AUDIO_PROT ,-)'_Detect Audio Amp Error.
DC_ALERT1 +3.3V,+5V+_Detect+3.3V+5VDrop.(V_DROP_DET)
4BALANCER_ERR Notused
TCON_ERR T-CON12V+_Detect12V_TCON(12V_TCON_DROP_DET)
PANEL_POWE Not used
6 BACKLIGHT_ERR #_Detectpanel backlightready.
7TEMP_ERR Notused
8 - Notused
9 - Notused
10 - Notused
11 - Notused
12 - Notused
5
3

KDL-42/47R500A(CH) 9
SELF CHECK
<<
000
000
000
000
000
000
000
000
000
BACK
002 MAIN_POWER
003 TUNER_ERR
003 AUDIO_PROT
003 DC_ALERT1
004 BALANCER_ERR
005 TCON_ERR
005 PANEL_POWE
006 BACKLIGHT_ERR
007 TEMP_ERR
12345-67891-23456
[Home] Exit
ᬙ䱰󱂖᭄
Error count
乍Ⳃৡ⿄
Item name
LEDᕙᴎᣛ⼎♃䮾⚕󱂖᭄
STBY LED flash time
⎆᱊ሣ䖤㸠ᇣᯊ᭄˄Panel operation time by hour˅
ࡼ󱂖᭄(Boot count)
ᘏ䖤㸠ᇣᯊ᭄(Total operation time by hour)
಴Ўᰒ⼎೼ሣᐩϞⱘ䆞ᮁ㒧ᵰϡӮ㞾ࡼ⏙䰸ˈᑊྟ㒜ذ⬭೼㞾៥䆞ᮁሣᐩDŽᔧԴᅠ៤ׂ⧚ᯊˈᡞᰒ⼎㒧ᵰ⏙䳊DŽ
Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen . After you have completed the repairs, clear the result display to “0”.
⏙䰸㞾៥䆞ᮁ㸼˄Clearing the Self Check Diagnostic List˅
1. ᬙ䱰৆䆄ᔩ᭄䞣˄Error history and Error count ˅˖
2. ⎆᱊ሣ䖤㸠ᯊ䯈˄Panel operation time ˅˖
ᣝ乥䘧䬂8˄Press the Channel 8 ˅=>乥䘧䬂0 ˄Channel 0˅
ᣝ乥䘧䬂7 ˄Press the Channel 7 ˅=>乥䘧䬂0˄Channel 0 ˅
䗔ߎ㞾䆞ᮁሣᰒ
(Exiting the Self-diagnostic screen)
䗔ߎ㞾䆞ᮁሣᰒˈᣝϟ䘹᥻఼ϞⱘPOWER䬂៪㗙ᰃ⬉㾚ᴎϞⱘPOWERᓔ݇ᴹ݇ᥝ⬉㾚ᴎDŽ
To exit the Self Diagnostic screen, turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV.
㞾䆞ᮁࡳ㛑
(SELF DIAGNOSIS FUNCTION)
[
㞾䆞ᮁᰒ⼎ሣᰒ
][SELF DIAGNOSTIC SCREEN DISPLAY]

KDL-50R550A/556A, 60R520A/550A, 70R550A(CH) 10
• Items with no part number and no description are not stocked because they are seldom required for roution service.
• The construction parts of an assembled part are indicated with a collation number in the remark colum.
• Items marked " * " are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.
SEC 1.  (DISASSEMBLY AND PARTS LIST)
Note: About the wire dressing, disassembly of rear cover and service position, please refer to “APPENDIX-1”.