Sony Ba 6 Service Manual

							 SERVICE MANUAL BA-6 CHASSIS
TRINITRON® COLOR TELEVISION
       MODEL NAME  REMOTE COMMANDER DESTINATION   CHASSIS NO. 
9-965-948-02
KV-27FS100L RM-Y180 US  SCC-S61G-A
KV-27FS100L RM-Y180 CANADA SCC-S59G-A
KV-29FS100L RM-Y180 LATIN NORTH SCC-S60R-A
KV-29FS100L RM-Y180 LATIN SOUTH SCC-S60S-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE:  7/2003
 :UPDATED ITEM
REVISION DATE   SUBJECT     
7/2003        No revisions or updates are applicable at this time.
11/2003        Replaced A Board Schematic to correct T603 PIN Connection (Replace Page 31) ☛ 
						

							 SERVICE MANUAL BA-6 CHASSIS
TRINITRON® COLOR TELEVISION
       MODEL NAME  REMOTE COMMANDER DESTINATION   CHASSIS NO. 
9-965-948-02
KV-27FS100L RM-Y180 US  SCC-S61G-A
KV-27FS100L RM-Y180 CANADA SCC-S59G-A
KV-29FS100L RM-Y180 LATIN NORTH SCC-S60R-A
KV-29FS100L RM-Y180 LATIN SOUTH SCC-S60S-A
Self DiagnosisSupported model
KV-27FS100L RM-Y180  
						

							— 3 —
KV-27FS100L/29FS100L
TABLE OF CONTENTS
SECTION TITLE   PAGE
Specifications.............................................................................................................................................................................4
Warnings and Cautions..............................................................................................................................................................5
Safety Check-Out.......................................................................................................................................................................6
Self-Diagnostic Function.............................................................................................................................................................7
SECTION 1:  DISASSEMBLY.............................................................................................................................................................9
1-1. Rear Cover Removal..........................................................................................................................................................9
1-2. Chassis Assembly Removal...............................................................................................................................................9
1-3. Service Position.................................................................................................................................................................9
1-4. Picture Tube Removal......................................................................................................................................................10
 Anode Cap Removal Procedure.......................................................................................................................................10
SECTION 2:  SET-UP ADJUSTMENTS.............................................................................................................................................11
2-1. Beam Landing...................................................................................................................................................................11
2-2. Convergence....................................................................................................................................................................12
2-3. Focus...............................................................................................................................................................................13
2-4. Screen (G2)......................................................................................................................................................................14
2-5. Method of Setting the Service Adjustment Mode.............................................................................................................14
2-6. White Balance Adjustments.............................................................................................................................................14
SECTION 3:  SAFETY RELATED ADJUSTMENTS.........................................................................................................................15
3-1. X R564 Confirmation Method (HV Hold-Down Confirmation) and Readjustments........................................................15
3-2. B+ Voltage Confirmation and Adjustment........................................................................................................................15
SECTION 4:  CIRCUIT ADJUSTMENTS..........................................................................................................................................17
4-1. Setting the Service Adjustment Mode..............................................................................................................................17
4-2. Memory Write Confirmation Method................................................................................................................................17
4-3. Remote Adjustment Buttons and IndicatorS....................................................................................................................17
4-4. ID Map Table....................................................................................................................................................................26
4-5. A Board Adjustments........................................................................................................................................................26
SECTION 5:  DIAGRAMS.................................................................................................................................................................29
5-1. Circuit Boards Location....................................................................................................................................................29
5-2. Printed Wiring Board and Schematic Diagram Information..............................................................................................29
5.3. Block Diagram and Schematics.........................................................................................................................................30
 A Board Schematic Diagram ...........................................................................................................................................31
 V Board Schematic Diagram............................................................................................................................................35
 HS Board Schematic Diagram.........................................................................................................................................37
 CV Board Schematic Diagram.........................................................................................................................................39
 D Board Schematic Diagram............................................................................................................................................41
5-4. Semiconductors...............................................................................................................................................................43
SECTION  6:  EXPLODED VIEWS...................................................................................................................................................44
6-1. Chassis .............................................................................................................................................................................44
6-2.  Picture Tube.....................................................................................................................................................................45
SECTION  7:  ELECTRICAL PARTS LIST.......................................................................................................................................46 
						

							— 4 —
KV-27FS100L/29FS100L
SPECIFICATIONS
Design and specifications are subject to change without notice.
1) 1 Vp-p 75 ohms unbalanced, sync negative 2) Y: 1 Vp-p 75 ohms unbalanced, sync negative C: 0.286 Vp-p (Burst signal), 75 ohms3) Y: 1.0 Vp-p, 75 ohms, sync negative; PB: 0.7 Vp-p, 75 ohms;  PR Vp-p, 75 ohms.4) 500 mVrms (100% modulation), Impedance: 47 kilohms5)  More than 408 mVrms at the maximum volume setting (variable) More than 408 mVrms (fix); Impedance (output): 2 kilohms
Television system
American TV Standard, NTSC 
Channel coverage
VHF: 2-13/ UHF: 14-69/ CATV: 1-125
Picture tube
FD Trinitron® tube
Antenna
 75 ohm external terminal for VHF/UHF
Supplied Accessories
 Remote Commander: 
   RM-Y180
 Size AA (R6) batteries (2)
 Antenna, Telescopic
 
Visible screen size
27 inch picture measured diagonally
Actual screen size
29 inch measured diagonally
(•) SRS (SOUND RETRIEVAL SYSTEM)
The (•) SRS (SOUND RETRIEVAL SYSTEM) is manufactured by 
Sony Corporation under license from SRS Labs, Inc. It is covered by U.S. 
Patent No. 4,748,669. Other U.S. and foreign patents pending. 
The word ‘SRS’ and the SRS symbol (•) are registered trademarks of 
SRS Labs, Inc. BBE and BBE symbol are trademarks of BBE Sound, Inc. 
and are licensed by BBE Sound, Inc. under U.S. Patent No. 4,638,258. 
KV-27FS100L
KV-29FS100L
Power requirements (Latin North) 120V, 60Hz
Power requirements (Latin South) 220V, 50/60Hz
Number of Inputs/Outputs Video
1)3
S Video 2)1
Y, P
B, PR  3)1
Audio4)2
Speaker output (W) 10 W x 2
Power Consumption (W) In use (Max) 180W
In Standby 1W
Dimensions(W/H/D) mm770 x 590 x 490 mm
in 30
1/4 x 231/4 x 191/4
Mass
kg 45.5 kg
lbs 100 lbs. 5 oz. 
						

							— 5 —
KV-27FS100L/29FS100L
WARNINGS AND CAUTIONS
CAUTION
Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT, after 
removing the anode.
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.
! 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. 
ATTENTION!!
Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique 
de l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.
Afin 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.
! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Les composants identifies 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 identifies dans le present manuel. Suivre ces procedures lors de chaque 
remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte. 
						

							— 6 —
KV-27FS100L/29FS100L
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 B+ and HV to see if they are specified values. Make sure 
your instruments are accurate; be suspicious of your HV meter if sets 
always have low HV.
8. Check the antenna terminals, metal trim, “metallized” knobs, screws, 
and all other exposed metal parts for AC leakage. Check leakage as 
described below.
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 Precision 245 
digital multimeter is suitable for this job.
3.  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).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate 
retaining screw 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).
To Exposed Metal 
Parts on Set
0.15 F1.5 K ΩAC
Voltmeter
(0.75 V)
Earth Ground
Trouble LightAC Outlet Box Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.Figure B. Checking for earth ground. 
						

							— 7 —
KV-27FS100L/29FS100L
Detected Symptoms
SELF-DIAGNOSTIC FUNCTION
*If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.  The symptom that is diagnosed first by the 
mircrocontroller is displayed on the screen.
**Refer to Screen (G2) Adjustments in Section 2-4. of this manual.
Display of Standby/Timer LED Flash Count
 
 Diagnostic Item   Flash Count*
 +B Overcurrent   2 times
 I-Prot     4 times
 IK (AKB)     5 times
 *One flash count is not used for self-diagnostic.
Stopping the Standby/Timer LED Flash
Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from flashing.
Self DiagnosisSupported model
Standby/Timer LED
The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER 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/TIMER 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 .
Diagnostic Test Indicators
When an error occurs, the STANDBY/TIMER 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.
Results for all of the following diagnostic items are displayed on screen.  No error has occurred if the screen displays a “0”.
Power does not turn on 
+B overcurrent (OCP)* 
I-Prot
IK (AKB)
Does not light
2 times
4 times
5 times
2:0 or 2:1
4:0 or 4:1
5:0 or 5:1
•Power cord is not plugged in.
•Fuse is burned out (F601). (A Board)
•H.OUT (Q505) is shorted. (A Board)
•IC1751 is shorted. (CV Board)
•+13V is not supplied. (A Board)
•IC545 is faulty. (A Board)
•IC001 is faulty.  (A Board)
•Screen (G2) is improperly adjusted.**
No. of times 
STANDBY/  TIMER 
lamp flashes
 Diagnostic Item 
Description
Self-Diagnositc 
Display/ 
Diagnostic Result
Probable Cause Location
•Power does not come on.
•No power is supplied to the TV.
•AC Power supply is faulty.
•Power does not come on.
•Load on power line is shorted.
•Has entered standby state after horizontal raster.
•Vertical deflection pulse is stopped.
•Power line is shorted or power supply is stopped.
•No raster is generated.
•CRT Cathode current detection reference pulse       
output is small.
2 times
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.LED OFF
3 sec. 
						

							— 8 —
KV-27FS100L/29FS100L
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 on the screen for confirmation.
To Bring Up Screen Test
In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:
Display   Channel 5       Sound Volume -  Power ON
Self-Diagnostic Screen Display
Numeral “0” means that no fault was detected.
Numeral “1” means a fault was detected one time only.
SELF DIAGNOSTIC
2: 000 
3: N/A 
4: 000 
5: 001 
101: N/A 
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-diagnostic function will not be able to detect subsequent faults after completion of the repairs.
Clearing the Result Display
To clear the result display to “0”, press buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:
Channel 8  ENTER
Quitting the Self-Diagnostic Screen
To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.
Self-Diagnostic Circuit
+B overcurrent (OCP) 
Occurs when an overcurrent on the +B (135V) line is detected by pin 72 of IC001 (A  Board). If the voltage of pin 72 of IC001 (A Board) is less than 1V 
when V.SYNC is more than seven verticals in a period, the unit will automatically turn off. 
I-Prot 
Occurs when an absence of the vertical deflection pulse is detected by pin 78 of IC001 (A Board). Power supply will shut down when waveform interval 
exceeds 2 seconds. 
IK (AKB) 
If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC001 (A  Board). TV will stay on, but 
there will be no picture.
*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).
Note that this differs from entering the Service Mode (Sound Volume + ).
A BOARD
IC001
Y/CHROMA JUNGLEA 
BOARD
IC545
V.
 OUT A 
BOARD
IC001
SYSTEM A 
BOARD
IC002
MEMORY
IK-AKBIN
FROM
CV BOARD
IC1751 PIN 5
I-HLDWN
FROM
A 
BOARD
IC561
PIN 7
72 O-LED
REFI-Prot
IO-BDATBDA
DISPLAY
51378
79
535 
						

							— 9 —
KV-27FS100L/29FS100L
1-1. REAR COVER REMOVAL
SECTION 1:  DISASSEMBLY
1-2. CHASSIS ASSEMBLY REMOVAL1-3. SERVICE POSITION
Chassis AssemblyClaw
2 Screws +BVTP 4X16 TYPE2 TT(B)
Rear Cover
A Board
CV Board
1 Press on catch tab to release A Board.
2 Disconnect cables as needed to allow A Board to be removed.
 
D BoardHS Board
2 Screws +BVTP 4X16 TYPE2 TT(B)
4 Screws +BVTP 4X16 TYPE2 TT(B)
2 Screws +BVTP 4X16 TYPE2 TT(B)
5 Screws +BVTP 3X12 TYPE2 TT(B)
V Board 
						

							— 10 —
KV-27FS100L/29FS100L
1. Discharge the anode of the CRT and remove the anode cap.
2. Unplug all interconnecting leads from the deflection yoke, neck 
assembly, degaussing coils and CRT grounding strap.
3. Remove the CV Board from the CRT.
4.  Remove the chassis assembly.
5. Loosen the neck assembly fixing screw and remove.
6. Loosen the deflection yoke fixing screw and remove.
7. Place the set with the CRT face down on a cushion and remove 
the degaussing coil holders.
8. Remove the degaussing coils.
9. Remove the CRT grounding strap and spring tension devices.
10. Unscrew the four CRT fixing screws [located on each CRT 
corner] and remove the CRT  [Take care not to handle the CRT 
by the neck].
1-4. 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.
ANODE CAP REMOVAL PROCEDURE
WARNING: 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 coated earth ground strap of CR T. 
NOTE:  After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon 
painted on the CRT. 
REMOVAL PROCEDURES
HOW TO HANDLE AN ANODE CAP
1. Do not use sharp objects which may cause damage to the surface of the anode 
cap. 
2. To avoid damaging the anode cap, do not squeeze the rubber covering too 
hard. A material fitting called a shatter-hook terminal is built into the rubber. 
3. Do not force turn the foot of the rubber cover. This may cause the shatter-hook 
terminal to protrude and damage the rubber.
10
6
5
4
3
1
2
Turn up one side of the rubber cap in 
the direction indicated by arrow a .
Use your thumb to pull the rubber
cap firmly in the direction indicated
by arrow b .
When one side of the rubber cap separates from 
the anode button, the anode cap can be removed 
by turning the rubber cap and pulling it in the 
direction of arrow c .
8
7
9
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