Sony BRAVIA KDL-32R420A User manual

SERVICE MANUAL
Version Date Subject
1.0 3/2013 Original manual issue.
1.1 10/2013 Correction of Panel Selection in Service mode. (P.19)
LCD Digital Color TV
9-888-532-02
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 3/2013 RB1FKCHASSIS
Segment: BA

SERVICE MANUAL
LCD Digital Color TV
9-888-532-02
RB1FKCHASSIS
Segment: BA

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 3
MODEL LIST
MODEL COLOR COMMANDER DEST.
MODEL COLOR COMMANDER DEST.
KDL-32R420A Black RM-ED054 AEP
KDL-32R421A Black RM-ED054 AEP
KDL-32R423A Black RM-ED054 AEP/UK
KDL-32R424A Black RM-ED054 AEP
KDL-40R470A Black RM-ED054 AEP
KDL-40R471A Black RM-ED054 AEP
KDL-40R473A Black RM-ED054 AEP/UK
KDL-40R474A Black RM-ED054 AEP
KDL-46R470A Black RM-ED054 AEP
KDL-46R473A Black RM-ED054 AEP/UK

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 4
WARNINGS AND CAUTIONS - ENGLISH
CAUTION
These servicing instructions are for use by qualified service personnel only.
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.
WARNING!!
An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis.
The chassis of this receiver is directly connected to the ac power line.
CARRYING THE TV
Be sure to follow these guidelines to protect your property and avoid causing serious injury.
• Carry the TV with an adequate number of people; larger size TVs require two or more people.
• Correct hand placement while carrying the TV is very important for safety and to avoid damages.
SAFETY-RELATED COMPONENT WARNING!!
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-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 5
WARNINGS AND CAUTIONS - FRENCH
ATTENTION!!
Ces instructions de service sont à l’usage du personnel de service qualifi é seulement.
Pour prévenir le risque de choc électrique, ne pas faire l’entretien autre que celui contenu dans le Mode d’emploi à moins que vous soyez qualifi é faire ainsi.
WARNING!!
Afi n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout dépannage. Le chássis de ce récepteur est
directement raccordé à l’alimentation du secteur.
POUR TRANSPORTER LE TÉLÉVISEUR
Tenez compte de ce qui suit pendant l’installation du téléviseur :
• Débranchez tous les câbles avant de transporter le téléviseur.
• Transportez le téléviseur avec le nombre de personnes approprié ; un téléviseur de grande taille doit être transporté par au moins deux personnes.
• Lors du transport du téléviseur, l’emplacement des mains est très important pour votre sécurité, ainsi que pour éviter de causer des dommages.
ALERTE!!
Afi n d’eviter tout risque d’electrocution provenant d’un chassis sous tension, un transformateur d’isolement doit etre utilise lors de tout depannage. Le chassis de ce recepteur est
directement raccorde a l’alimentation du secteur.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifi es par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces sont d’une importance critique pour la securite du
fonctionnement. Ne les remplacer que par des composants Sony dont le numero de piece est indique dans le present manuel ou dans des supplements publies par Sony. Les reglages
de circuit dont l’importance est critique pour la securite du fonctionnement sont identifi es dans le present manuel. Suivre ces procedures lors de chaque remplacement de
composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 6
WARNINGS AND CAUTIONS
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When repairing the LCD panel on the wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.
1) Do not press on the panel or frame edge to avoid the risk of electric shock.
2) Do not scratch or press on the panel with any sharp objects.
3) Do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
4) Do not expose the LCD panel to direct sunlight.
5) Avoid contact with water. It may cause a short circuit within the module.
6) Disconnect the AC power when replacing the backlight (CCFL) or inverter circuit. (High voltage occurs at the inverter circuit at 650Vrms.)
7) Always clean the LCD panel with a soft cloth material.
8) Use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
9) Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10) It is recommended not to exceed 1 hour of Power-On nor Burn-in period with LCD panel face down condition, in repair activity.

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 7
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors.
3. 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.
4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.
8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.

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SAFETY CHECK-OUT
Leakage Test
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. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’
instructions to use these instructions.
2. A battery-operated AC milliampmeter. The Data Precision245 digital multimeteris suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The
“limit” indicationis 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).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retainingscrew on most AC outlet boxes is also
at earth ground.
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-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 9
SELF DIAGNOSIS FUNCTION
DIAGNOSTIC TEST INDICATORS
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 .
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.
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.
STBY LED
Flash time
Service menuItem
name
(Screen Display)
Diagnostic Item Description
2MAIN_POWER Detect power board 12V. (V_DROP_DET)
TUNER_ERR Detect TS signal Error.
AUDIO_PROT DetectAudio Amp Error.
DC_ALERT1 Detect +3.3V+5VDrop.(V_DROP_DET)
4BALANCER_ERR Notused
TCON_ERR Not used
PANEL_POWE Notused
6 BACKLIGHT_ERR Detect panel backlightready.
7TEMP_ERR Not used
8 - Notused
9 - Notused
10 -Notused
11 -Notused
12 -Notused
3
5
DISPLAY OF STANDBY LED FLASH COUNT
SELF-DIAGNOSTIC SCREEN DISPLAY
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:
[To Bring Up Screen Test]
In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 10
SELF CHECK
BACK <<
002 MAIN_POWER 000
003 TUNER_ERR 000
003 AUDIO_PROT 000
003 DC_ALERT1 000
004 BALANCER_ERR 000
005 TCON_ERR 000
005 PANEL_POWE 000
006 BACKLIGHT_ERR 000
007 TEMP_ERR 000
12345-67891-23456
[Home] Exit
SELF DIAGNOSIS FUNCTION
[SELF DIAGNOSTIC SCREEN DISPLAY]
Error count
Item name
STBY LED flash time
Total operation time by hour
Boot count
Panel operation time by hour
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”.
Clearing the Self Check Diagnostic List
1. Error history and Error count : Press the Channel 8 => Channel 0 .
2. Panel operation time : Press the Channel 7 => Channel 0 .
Exiting the Self-diagnostic screen
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.

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 11
• 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, please refer to “APPENDIX-1”.
Note: About the tape position, please refer to “APPENDIX-2”.
Note: About the procedure of switch unit disassembly method, please refer to “APPENDIX-3”.

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 12
1-1-1. STAND SHAFT
REF. No. PART No. DESCRIPTION MARK
14-446-634-01 STAND SHAFT (M2)
24-459-441-51 COVER,UNDER (32FANF) for KDL-32R423A(UK)
4-459-441-61 COVER,UNDER (32FANF) for KDL-32R420A/421A/
423A(AEP)/424A
2-580-608-11 SCREW, +PSW M5X16
2-580-639-01 SCREW, +BVTP 4X12 TYPE2 IT-3
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
DISASSEMBLY AND PARTS LIST
1-1-2. COVER, UNDER
2
1
1-1. KDL-32R420A/421A/423A/424A

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DISASSEMBLY AND PARTS LIST
1-1-3. GL3 BOARD, A BOARD, SPEAKER AND VESA BRACKET
REF. No. PART No. DESCRIPTION MARK
31-492-329-21 SWITCH UNIT
41-910-108-04 FFC CABLE 32 MB-KEY6P
51-858-888-21 LOUD SPEAKER (R) 40X100MM
61-474-486-11 GL3(ID)-STATIC CONVERTER(TV)
71-910-107-98 CONNECTOR ASSY32 MB-SP LR 4P
81-846-662-11 POWER-SUPPLYCORD for KDL-32R420A/421A
/423A(AEP)/424A
1-846-663-11 POWER-SUPPLYCORD for KDL-32R423A(UK)
91-910-108-02 FFC CABLE32 MB-TCON 30P
10 1-910-108-03 FFC CABLE32 MB-IR 10P
11 1-910-107-97 CONNECTOR ASSY32 MB-PSU 14P
12 1-895-375-11 MOUNTED PWB A for KDL-32R420A/421A
1-895-375-21 MOUNTED PWB A for KDL-32R423A(AEP)/424A
1-895-375-31 MOUNTED PWB A for KDL-32R423A(UK)
13 1-858-888-11 LOUD SPEAKER (L) 40X100MM
14 A-1939-532-A LCMASSY(32FANFYMR) EU for KDL-32R420A/423A
A-1939-533-A LCMASSY(32FANFYHL) EU for KDL-32R421A/424A
15 4-459-475-21 BRACKET, VESA(FANF)
16 1-910-107-99 GROUND CABLE 32 MB-PSU (M)
7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
1-1. KDL-32R420A/421A/423A/424A
5
11
6 12
13
15
7
3
10
8
9
4 14
16

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1-2. KDL-40R470A/471A/473A/474A
1-2-1. STAND SHAFT
DISASSEMBLY AND PARTS LIST
1-2-2. COVER, UNDER
REF. No. PART No. DESCRIPTION MARK
14-446-635-01 STAND SHAFT (ML2)
24-459-446-51 COVER,UNDER (40FANF) for KDL-40R473(UK)
4-459-446-61 COVER,UNDER (40FANF) for KDL-40R470A/471A
/473(AEP)/474A
2-580-608-11 SCREW, +PSW M5X16
2-580-639-01 SCREW, +BVTP 4X12 TYPE2 IT-3
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
2
1

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 15
REF. No. PART No. DESCRIPTION MARK
31-910-108-12 FFC CABLE 40 MB-KEY6P
41-492-329-21 SWITCH UNIT
51-474-487-11 GL4(CH)-STATIC CONVERTER (TV)
61-858-888-21 LOUD SPEAKER (R) 40X100MM
71-910-108-06 CONNECTOR ASSY40 MB-SP LR 4P
81-846-662-11 POWER-SUPPLYCORD for KDL-40R470A/471A
/473A(AEP)/474A
1-846-663-11 POWER-SUPPLYCORD for KDL-40R473A(UK)
91-910-108-10 FFC CABLE40 MB-TCON 51P
10 1-910-108-05 CONNECTOR ASSY40 MB-PSU 14P
11 1-910-108-11 FFC CABLE40 MB-IR 10P
12 1-895-375-41 MOUNTED PWB A for KDL-40R470A/471A
1-895-375-51 MOUNTED PWB A for KDL-40R473A(AEP)/474A
1-895-375-61 MOUNTED PWB A for KDL-40R473A(UK)
13 1-858-888-11 LOUD SPEAKER (L) 40X100MM
14 A-1939-535-A LCMASSY(40FANFYMR) EU for KDL-40R470A/473A
A-1939-536-A LCMASSY(40FANFYHL) EU for KDL-40R471A/474A
15 4-459-475-21 BRACKET, VESA(FANF)
7-685-646-79 SCREW, +BVTP 3X8 TYPE2 IT-3
2-580-639-01 SCREW, +BVTP 4X12 TYPE2 IT-3
DISASSEMBLY AND PARTS LIST
1-2-4. VESA BRACKET
1-2. KDL-40R470A/471A/473A/474A
1-2-3. GL4 BOARD, A BOARD AND SPEAKER
15 15
6
5 12
7 13
8
4
3
10
9
11
14

REF. No. PART No. DESCRIPTION MARK
14-446-636-01 STAND SHAFT (L2)
24-459-473-51 COVER,UNDER (46FANF) for KDL-46R473A(UK)
4-459-473-61 COVER,UNDER (46FANF) for KDL-46R470A/473A(AEP)
2-580-608-11 SCREW, +PSW M5X16
2-580-639-01 SCREW, +BVTP 4X12 TYPE2 IT-3
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 16
1-3. KDL-46R470A/473A
1-3-1. STAND SHAFT
DISASSEMBLY AND PARTS LIST
1-3-2. COVER, UNDER
2
1

KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK) 17
REF. No. PART No. DESCRIPTION MARK
31-492-329-21 SWITCH UNIT
41-910-108-20 FFC CABLE 46 MB-KEY6P
51-474-488-11 GL5(CH)-STATIC CONVERTER (TV)
61-858-888-21 LOUD SPEAKER (R) 40X100MM
71-910-108-14 CONNECTOR ASSY46 MB-SP LR 4P
81-846-662-11 POWER-SUPPLYCORD for KDL-46R470A/473A(AEP)
1-846-663-11 POWER-SUPPLYCORD for KDL-46R473A(UK)
91-910-108-18 FFC CABLE46 MB-TCON 51P
10 1-910-108-19 FFC CABLE46 MB-IR 10P
11 1-910-108-13 CONNECTOR ASSY46 MB-PSU 14P
12 1-895-375-41 MOUNTED PWB A for KDL-40R470A
1-895-375-51 MOUNTED PWB A for KDL-46R473A(AEP)
1-895-375-61 MOUNTED PWB A for KDL-46R473A(UK)
13 1-858-888-11 LOUD SPEAKER (L) 40X100MM
14 A-1939-537-A LCMASSY (46FANFYMR) EU for KDL-46R470A/473A
15 4-459-475-31 BRACKET, VESA(FANF)
7-685-646-79 SCREW, +BVTP 3X8 TYPE2 IT-3
4-465-806-01 GEAR SCREW M3X5 22
2-580-639-01 SCREW, +BVTP 4X12 TYPE2 IT-3
7-685-647-79 SCREW +BVTP 3X10 TYPE2 IT-3
DISASSEMBLY AND PARTS LIST
1-3. KDL-46R470A/473A
1-3-4. VESA BRACKET
15 15
1-3-3. GL5 BOARD, A BOARD AND SPEAKER
3
4
8
9
11
13
10
7
6
5 12
14

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1-4. OTHER PART
PART No. DESCRIPTION MARK
1-492-067-11 REMOTE COMMANDER (RM-ED054)
4-458-514-11 MANUAL, INSTRUCTION GB
4-458-514-21 MANUAL, INSTRUCTION FR/ES/NL/DE/PT
4-458-514-31 MANUAL, INSTRUCTION NO/FI/DK/SE
4-458-514-41 MANUAL, INSTRUCTION PL/HU/CZ/SK/RO/BG/GR/IT
4-458-514-91 MANUAL, INSTRUCTION RU/UA
4-459-474-21 BRACKET, VESATOP LONG A (46FAN) for wall mount (46inch only)
2-580-602-01 SCREW, +PSW M4X12 (VESAL FAN) for wall mount (46inch only)
1-4-1. MISCELLANEOUS
DISASSEMBLY AND PARTS LIST

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SEC 2. ADJUSTMENT
HOW TO ENTERING SERVICE MODE
1) Turn on the main power switch to place this set in standby mode.
2) Press the buttons on the remote commander as follows, and entering service mode.
3) Service mode display.
Service Mode
Status Information >>
Self diagnosis history >>
Panel Selection <[ 19_S320DB3-1_EU ]>
NO_SIGNAL_MUTE <[ Off ]>
TUNING SYSTEM <[ AUTO ]>
LVDS Spectrum (%o) <[ 30 ]>
Low of HPD <[ 5 ]>
UART Selection <[ Usb Fact ]>
SERIAL NUMBER EDID 6000001
MODEL NAME EDID KDL-32R420A
[</>]Set[Home]Exit
5
Info TV POWERChannel Volume
Panel Selection MODEL NAME EDID
19_S320DB3-1_EU KDL-32R420A
KDL-32R421A
KDL-32R423A
KDL-32R424A
18_S400DH1-1_EU KDL-40R470A
KDL-40R471A
KDL-40R473A
KDL-40R474A
48_S460DH1-1_EU KDL-46R470A
KDL-46R473A
- When replace Main Board or panel, please confirm "Panel Selection" and "MODEL NAME EDID" in service mode.
If they are different, please select a suitable thing.
- Change of SERIAL NUMBER EDID and MODEL NAME EDID are possible only once when they are white character.
Note: About the software data update, please refer to “APPENDIX-4”.

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ADJUSTMENT
4) How to use the remote commander.
5) After entering service mode, then turn off the power switch.
Function The flow of control
Service mode on <Info><5><Vol Up><Power>
Service mode off <Other> / <Power off + on>
Adjustment Item up / down /
Data Value up / down /