Sony FD Trinitron WEGA KV-32FV16 User manual

SERVICE MANUAL
AA-2U CHASSIS
MODEL COMMANDER DEST CHASSIS NO.
KV-32FV16 RM-Y171 US SCC-S44E-A
KV-32FV26 RM-Y170 US SCC-S44F-A
KV-32FV26 RM-Y170 CND SCC-S45D-A
KV-34FV16 RM-Y171 E SCC-S50A-A
KV-34FV16C RM-Y171 E SCC-S50B-A
KV-34FX260 RM-Y170 E SCC-S50C-A
KV-34FX260C RM-Y170 E SCC-S50D-A
TRINITRON®COLOR TV
RM-Y170
KV-32FV26

—2 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
1) 1Vp-p75ohmsunbalanced,syncnegative
2) Y: 1Vp-p75ohmsunbalanced,syncnegative
C: 0.286Vp-p (Burst signal),75 ohms
3) Y:1.0Vp-p,75ohms,syncnegative;PB:0.7 Vp-p, 75 ohms;
PR:Vp-p,75ohms
4) 500mVrms(100%modulation),Impedance: 47kilohms
5) Morethan408mVrmsatthemaximumvolume setting (variable)
Morethan408mVrms(fix);Impedance (output): 2 kilohms
SPECIFICATIONS
( •) 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 and 4,482,866.
Television system
American TV standard, NTSC
Channel coverage
VHF: 2-13/ VHF: 14-69/ CATV: 1-125
Picture tube
Flat Trinitron® tube
Visible screen size
32-inch picture measured diagonally
Actual screen size
34-inch measured diagonally
Antenna
75 ohm external terminal for VHF/UHF
Supplied Accessories
RM-Y170(KV-32FV26/KV-34FX260/34FX260C ONLY)
RM-Y171(KV-32FV16/34FV16/34FV16CONLY)
Batteries sizeAA (R6) (2)
Wireless Stereo Headphones MDR-1F0230
(ALLEXCEPT KV-32FV16/34FV16/34FV16C)
Battery for Headphones size AA (R6) (1)
(ALLEXCEPT KV-32FV16/34FV16/34FV16C)
Optional Assessories
AV Cable: VMC-810/820/830 HG
Audio Cable: RKC-515HG
S-LINK Cable: RK-G69HG
Component Video Cable: VMC-10/30 HG
TV Stand: SU-32FD3
Design and specifications are subject to change without notice.
KV-32FV16
KV-32FV26
KV-34FV16
KV-34FV16C
KV-34FX260
KV-34FX260C
Power requirements 120V/60Hz 120V-220V / 60Hz, 50Hz
Number of inputs/outputs
Video
1)
S Video
2)
Y,P
B
, P
R
3)
Audio
4)
Audio Out
5)
Monitor Out
S-Link
Control-S (IN/OUT)
Speaker output(W)
Power Consumption(W)
In use(Max)
In standby
Dimensions(W/H/D)
(mm)
(inches)
Mass
(kg)
(lbs)
882 x 687 x 592 mm
34
3/4
x 27 x 23
1/4
176 lbs.
80 kg
3
2
1
4
1
1
3
1
15Wx2
200W
2W

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KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
Section Title Page
Warnings and Cautions...............................................................................................................................................................4
Self-Diagnostic Function .............................................................................................................................................................4
Safety Check-Out Instructions ...................................................................................................................................................7
1. DISASSEMBLY
1-1. Rear Cover Removal.......................................................................................................................................................8
1-2. Chassis Assembly Removal ........................................................................................................................................... 8
1-3. Service Position ..............................................................................................................................................................8
1-4. PictureTubeRemoval .....................................................................................................................................................9
2. SET-UPADJUSTMENTS
2-1. BeamLanding ...............................................................................................................................................................10
2-2. Convergence ................................................................................................................................................................ 11
2-3. Focus ............................................................................................................................................................................13
2-4. Screen (G2) ..................................................................................................................................................................13
2-5. White Balance Adjustments ..........................................................................................................................................13
3. SAFETYRELATEDADJUSTMENTS
3-1. R530, R531 Confirmation Method (HV Hold-Down Confirmation and Readjustments)..........................................14
3-2. B+ Voltage Confirmation and Adjustment .....................................................................................................................14
4. CIRCUIT ADJUSTMENTS
4-1. Setting the Service Adjustment Mode ..........................................................................................................................15
4-2. Memory Write Confirmation Method..............................................................................................................................15
4-3. Adjust Buttons and Indicators ......................................................................................................................................15
4-4. Adjustment Items...........................................................................................................................................................16
4-5. FeatureID Map ..............................................................................................................................................................21
4-6. ProgramPaletteSettings...............................................................................................................................................22
4-7. A Board Adjustments ....................................................................................................................................................22
5. DIAGRAMS
5-1. BlockDiagram ...............................................................................................................................................................25
5-2. Circuit Board Location ..................................................................................................................................................33
5-3. Printed Wiring Boards and Schematic Diagrams .........................................................................................................33
• A Board ....................................................................................................................................................................34
• UX (MAIN) Board......................................................................................................................................................41
• UX(PIP) Board .........................................................................................................................................................45
• AK Board..................................................................................................................................................................49
• HA Board ..................................................................................................................................................................50
• G Board ....................................................................................................................................................................51
• GA Board..................................................................................................................................................................55
• HX Board ..................................................................................................................................................................58
• WA Board .................................................................................................................................................................59
• T Board.....................................................................................................................................................................61
• C Board ....................................................................................................................................................................63
• HB Board ..................................................................................................................................................................64
5-4. Semiconductors ............................................................................................................................................................65
6. EXPLODED VIEW
6-1. Chassis .........................................................................................................................................................................66
6-2. Picture Tube ..................................................................................................................................................................67
7. ELECTRICALPARTSLIST ...................................................................................................................................................68
TABLE OF CONTENTS

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KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
WARNINGS AND CAUTIONS
CAUTION
SHORTCIRCUITTHEANODEOFTHEPICTURETUBEAND
THEANODECAP TOTHEMETALCHASSIS, CRTSHIELD,
ORCARBON PAINTEDON THECRT,AFTER REMOVING
THEANODE.
WARNING!!
ANISOLATIONTRANSFORMERSHOULDBEUSEDDURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD,
BECAUSE OF LIVE CHASSIS. THE CHASSIS OF THIS
RECEIVERISDIRECTLYCONNECTEDTOTHEACPOWER
LINE.
SAFETY-RELATEDCOMPONENTWARNING!!
COMPONENTSIDENTIFIEDBYSHADINGANDMARK ON
THESCHEMATICDIAGRAMS,EXPLODED VIEWS,ANDIN
THEPARTSLISTARECRITICALFORSAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BYSONY.
CIRCUITADJUSTMENTSTHATARE CRITICALFORSAFE
OPERATIONAREIDENTIFIEDINTHISMANUAL.FOLLOW
THESE PROCEDURES WHENEVER CRITICAL
COMPONENTSAREREPLACEDORIMPROPEROPERATION
ISSUSPECTED.
ATTENTION!!
APRESAVOIRDECONNECTELECAP DEL'ANODE,COURT-CIRCUITER
L'ANODE DU TUBE CATHODIQUE ET CELUI DE L'ANODE DU CAP AU
CHASSISMETALLIQUEDEL'APPAREIL,OUAU COUCHEDECARBONE
PEINTE SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE
CATHODIQUE.
ATTENTION!!
AFIN D'EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT D'UN
CHÁSSISSOUSTENSION,UNTRANSFORMATEURD'ISOLEMENTDOITETRE
UTILISÉLORSDETOUTDÉPANNAGE.LECHÁSSISDECERÉCEPTEUREST
DIRECTEMENTRACCORDÉÀL'ALIMENTATIONSECTEUR.
ATTENTIONAUXCOMPOSANTSRELATIFSALASECURITE!!
LESCOMPOSANTSIDENTIFIESPARUNETRAMEETPARUNEMARQUE
SUR LESSCHEMAS DEPRINCIPE, LESVUES EXPLOSEESETLES
LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA
SECURITEDUFONCTIONNEMENT.NELES REMPLACERQUEPARDES
COMPOSANTSSONYDONTLE NUMERODE PIECEESTINDIQUEDANS
LEPRESENTMANUELOUDANSDESSUPPLEMENTSPUBLIESPARSONY.
LESREGLAGESDECIRCUITDONTL'IMPORTANCEESTCRITIQUEPOUR
LASECURITEDUFONCTIONNEMENTSONTIDENTIFIESDANSLEPRESENT
MANUEL.SUIVRECESPROCEDURESLORSDECHAQUEREMPLACEMENT
DE COMPOSANTS CRITIQUES, OU LORSQU'UN MAUVAIS
FONTIONNEMENTSUSPECTE.
SELF-DIAGNOSTIC FUNCTION
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”.
Diagnostic Item
Description
No. of Times
STANDBY/TIMER
LED Flashes
Self-diagnostic Display/
Diagnostic Result
Probable Cause
Location Detected Symptoms
Power does not turn on Does not light
N/A
• Power cord is not plugged in.
• Fuse is burned out. (F601) (A Board)
• Power does not come on.
• No power is supplied to the TV.
• AC power supply is faulty.
+B overcurrent (OCP)* N/A N/A • H.OUT (Q502) is shorted. (A Board)
• IC1701 is shorted. (C Board)
• Power does not come on.
• Load on power line is shorted.
+B overvoltage (OVP)* N/A N/A • IC643 or T603 is open. (G Board)
• IC6003 or PH6001 is open (GA Board)
• Power does not come on.
V-STOP* 4 times 4:0 or 4:1 • +12V is not supplied. (A Board)
• IC502 is faulty. (A Board)
• Has entered standby state after horizontal raster.
• Vertical deflection pulse is stopped.
• Power line is shorted or power supply is stopped.
IK (AKB) 5 times 5:0 or 5:1 • Video OUT (IC502) is faulty. (A Board)
• IC355 is faulty. (A Board)
• Screen (G2) is improperly adjusted.**
• No raster is generated.
• CRT cathode current detection reference
pulse output is small.
* If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.
The symptom that is diagnosed first by the microcontroller is displayed on the screen.
** Refer to Screen (G2) Adjustments in Section 2-4 of this manual.

—5 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
STANDBY/TIMER LED
Display of Standby/Timer LED Flash Count
4 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec. LED OFF
3 sec.
Diagnostic Item Flash Count*
V-STOP 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-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 5Sound volume
Note that this differs from entering the service mode (sound volume ).
Power ON
+
Self-Diagnostic Screen Display
2: +B OCP N/A
3: +B OVP N/A
4: VSTOP 0
5: AKB 1
101: WDT 24
Numeral “0” means that no fault was detected.
Numeral “1” means a fault was detected one time only.
SELF DIAGNOSIS

—6 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
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:
ENTERChannel 8
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
A BOARD
IC355
Y/CHROMA UNGLE
A BOARD
IC561
V. OUT
A BOARD
IC001
SYSTEM
A BOARD
IC1002
MEMORY
IK IN
FROM
C BOARD
IC1701 PIN1
21
HP/PROTECT
SDA
A BOARD
FROM
IC501
PIN 1
18
35 IO-SDATN
O-TIMELED
27
REF
3
V-STOP
IO-BDATN
15
26 BDA 5
59
DISPLAY
+B overcurrent (OCP) Occurs when an overcurrent on the +B (135V) line is detected by pin 18 of IC355 (A Board).
If the voltage of pin 18 of IC355 (A Board) is less than 1V when V.SYNC is more than seven
verticals in a period, the unit will automatically turn off.
+B overvoltage (OVP) Occurs when the feedback circuit from +B opens IC643 or T603 (G Board)/IC6003 or PH6001
(GA Board) or any other associated feedback components.
V-STOP Occurs when an absence of the vertical deflection pulse is detected by pin 15 of IC355 (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 IC355 (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:
Watch Dog Timer Indicates how many times the Watch Dog Timer functions have been activiated. Whenever
micro is reset by the Watch Dog Timer, this number is incremented. Maximum number is 255.

—7 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
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.
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 milliammeter. 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).
Figure B. Checking for earth ground.Figure A. Using an AC voltmeter to check AC leakage.
Trouble Light
AC Outlet Box Ohmmeter
Cold-water Pipe

—8 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
SECTION 2
DISASSEMBLY
1-1. REAR COVER REMOVAL
1-2. CHASSIS ASSEMBLY REMOVAL
5 Screws (+BVTP 4x16)
3 Screws
(+BVTP 4x16) 2 Screws (+BVTP 3x12)
4 Screws
(+BVTP 4x16)
4 Screws (+BVTP 4x16)
Claw
Chassis Assembly
1-3. SERVICE POSITION
A Board
UX Board
G Board (KV-32FV16/32FV26 ONLY)
GA Board (ALL EXCEPT KV-32FV16/32FV26)
C Board
WA Board

—9 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
10
9
8
7
1
6
5
4
3
Coated
Earth
Ground
Strap
1-4. PICTURE TUBE REMOVAL
WARNING:
BEFOREREMOVING
THEANODECAP
High voltage remains in the CRT
even after the power is discon-
nected. To avoid electric shock,
discharge CRT before attempting
to remove the anode cap. Short
between anode and CRT coated
earth ground strap.
a
REMOVAL PROCEDURES
HOW TO HANDLE AN ANODE CAP
WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electrical shock, discharge the CRT before
attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT.
NOTE: After removing the anode, 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.
1
Do not use sharp objects which may cause damage to the
surface of the anode cap.
3
Do not force turn the foot of the rubber cover. This may cause
the shatter-hook terminal to protrude and damage the rubber.
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.
2
Use your thumb to pull the rubber
cap firmly in the direction indicated
by arrow
b .
3
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 .
1
Turn up one side of the rubber cap in
the direction indicated by arrow
a .
b
Anode Button
c
ANODE CAP REMOVAL
1. Discharge the anode of the CRT and remove the anode cap.
2. Unplug allinterconnectingleads fromthe deflectionyoke, neck
assembly, degaussing coils and CRT grounding strap.
3. Remove the C 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].

—10 —
KV-32FV16/32FV26/34FV16/34FV16C/34FX260/34FX260C
SECTION 2
SET-UP ADJUSTMENTS
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.
The controls and switch should be set as follows
unless otherwise noted:
PICTURE control .........................................normal
BRIGHTNESS control.................................. normal
Perform the adjustments in order as follows:
1. BeamLanding
2. Convergence
3. Focus
4. Screen (G2)/White Balance
Note: Test Equipment Required:
1. Color Bar Pattern Generator
2. Degausser
3. DC Power Supply
4. DigitalMultimeter
5. Oscilloscope
6. CRTAnalyzer
2-1. BEAM LANDING
Preparation:
•Input a white pattern signal.
•Face the picture tube in an East or West direction to reduce
theinfluence of geomagnetism.
NOTE: Do not use the hand degausser because it magnetizes
the CRT .
1. Input white pattern from pattern generator.
2. Loosen the deflection yoke mounting screw, and set the
purity control to the center as shown below:
3. Input green pattern from pattern generator.
4. Move the deflection yoke backward, and adjust with the
purity control so that green is in the center and red and blue
are even on both sides.
Blue Red
Green
5. Move the deflection yoke forward, and adjust so that the
entire screen becomes green.
6. Switch over the raster signal to red and blue and confirm the
condition.
7. When the position of the deflection yoke is determined,
tighten it with the deflection yoke mounting screw.
8. When landing at the corner is not right, adjust by using the
disk magnets.
a
c
b
d
ba
cd
Purity control
corrects this area
Disk magnets
or rotatable disk
magnets correct
these areas (a-d)
Deflection yoke positioning
corrects these areas