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TRINITRON
® COLOR TELEVISION
SERVICE MANUAL
DX-1A CHASSIS
MODEL NAME
REMOTE COMMANDER
DESTINATION
CHASSIS NO.
KV-32HS20
RM-Y183
US
SCC-S47F-A
KV-36HS20
RM-Y183
US
SCC-S47E-A
KV-36HS20H
RM-Y183
HAWAII
SCC-S54C-A
KV-32XBR450
RM-Y184
US
SCC-S47D-A
KV-32XBR450
RM-Y184
CND
SCC-S48D-A
KV-36XBR450
RM-Y184
US
SCC-S47C-A
KV-36XBR450
RM-Y184
CND
SCC-S48C-A
KV-36XBR450H
RM-Y184
HAWAII
SCC-S54B-A
Self Diagnosis
Supported model
9-965-898-01
KV-32XBR450
RM-Y184


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KV-32HS20/36HS20/36HS20H/32XBR450/36XBR450/36XBR450H
TABLE OF CONTENTS
Specifications ................................................................................. 3
Warnings and Cautions .................................................................. 4
Safety Check-out ............................................................................ 5
Self-Diagnostic Function................................................................. 6
1. Disassembly
1-1. Rear Cover Removal .............................................................. 8
1-2. Chassis Assembly Removal................................................... 8
1-3. Service Position ..................................................................... 8
1-4. Picture Tube Removal ............................................................ 9
Anode Cap Removal Procedure ..................................................... 9
2. Set-up Adjustments
2-1. Beam Landing ...................................................................... 10
2-2. V-Pin and V-Cen Adjustment ................................................ 11
2-3. Convergence ........................................................................ 11
2-3.1. Vertical and Horizontal Static Convergence ............. 11
2-3.2. Operation of BMC (Hexapole) Magnet ..................... 11
2-3.3. TLH Plate Adjustment .............................................. 11
2-3.4. Screen Corner Convergence ................................... 12
2-3.5. Dynamic Convergence Adjustment .......................... 12
2-4. Focus Adjustment................................................................. 12
2-5. Screen (G2).......................................................................... 12
2-6. Picture Quality Adjustments ................................................. 13
2-6.1. Video Input - Two Picture Sub Contrast
Adjustment ............................................................... 13
2-6.2. Video Input - Sub Hue/Sub Color Adjustment.......... 13
2-6.3. RF Input - Two Picture Sub Contrast Adjustment ..... 14
2-6.4. RF Input - Sub Hue/Sub Color Adjustment .............. 14
2-7. White Balance (CRT) and Sub Bright Adjustment ............... 15
2-8. Raster Center Adjustment.................................................... 15
2-9. Picture Distortion Adjustments............................................. 15
2-9.1. NTSC (DRC) Full Mode Adjustment ........................ 15
2-9.2. 1080i HD Mode Adjustment ..................................... 16
2-9.3. Vertical Compresses Mode Check and
Confirmation............................................................. 16
SECTION TITLE
PAGE
3. Safety Related Adjustments
3-1. RV8001, 8002, 8003 Confirmation Method and
HV Service Adjustments ...................................................... 17
3-2. B+ Max Confirmation ........................................................... 17
3-3. HV Service Flowchart .......................................................... 17
4. Circuit Adjustments
4-1. Setting the Service Adjustment Mode .................................. 18
4-1.1
Resetting the Data ................................................... 18
4-2. Memory Write Confirmation Method .................................... 18
4-3. Remote Adjustment Buttons and Indicators......................... 18
5. Diagrams
5-1. Circuit Board Location.......................................................... 48
5-2. Printed Wiring Boards and Schematic Diagrams ................. 48
5-3. Diagrams
Block Diagram ...................................................................... 49
A Board ................................................................................ 53
B Board ................................................................................ 61
BC Board.............................................................................. 71
C Board ................................................................................ 73
D Board ................................................................................ 75
HA Board.............................................................................. 83
HB Board.............................................................................. 84
S Board ................................................................................ 85
U Board ................................................................................ 86
W Board ............................................................................... 88
5-4. Semiconductors ................................................................... 90
6. Exploded Views
6-1. Chassis ................................................................................. 92
6-2. Picture Tube (KV-32HS20/32XBR450 ONLY) ........................ 93
6-3. Picture Tube (ALL EXCEPT KV-32HS20/32XBR450) .......... 94
7. Electrical Parts List ......................................................................... 95
SECTION TITLE
PAGE


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KV-32HS20/36HS20/36HS20H/32XBR450/36XBR450/36XBR450H
TruSurround is a trademark of
SRS Labs, Inc. SRS and the SRS
symbol are registered trademarks
of SRS Labs, Inc. in the United
States and in select foreign coun-
tries. SRS and TruSurround are
incorporated under license from SRS Labs, Inc. and are protected
under United States Patent Nos. 4,748,669 and 4,841,572 with
numerous additional issued and pending foreign patents. Pur-
chase of this product does not convey the right to sell recordings
made with the TruSurround technology.
Television system
American TV standard, NTSC
Channel coverage
VHF: 2-13/ VHF: 14-69/ CATV: 1-125
Picture tube
FD Trinitron
®
tube
Visible screen size
32-inch picture measured diagonally (KV-32HS20/32XBR450 ONLY)
36-inch picture measured diagonally (All Except KV-32HS20/32XBR450)
Actual screen size
34-inch measured diagonally (KV-32HS20/32XBR450 ONLY)
38-inch measured diagonally (All Except KV-32HS20/32XBR450)
Antenna
75 ohm external terminal for VHF/UHF
Supplied Accessories
Remote Commander RM-Y183 (KV-32HS20/36HS20/36HS20H ONLY)
Remote Commander RM-Y184 (KV-32XBR450/36XBR450/36XBR450H ONLY)
Two Size AA (R6) Batteries
Optional Assessories
Connecting cables: RK-74A, VMC-810S/820/830HGS, VMC-720M,
VMC-810S/820S, YC-15V/30V, YC-15/30HG, RKG69HG, RKC-515HG
U/V mixer: EAC-66
TV Stand: SU-32HS2 (KV-32HS20 ONLY)
SU-36HS2 (KV-36HS20/36HS20H ONLY)
SU-32XBR45 (KV-32XBR450 ONLY)
SU-36XBR45 (KV-36XBR450/36XBR450H ONLY)
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 trade-
marks 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.
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 ohms
3) 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 kilohms
5) More than 408 mVrms at the maximum volume setting (variable)
More than 408 mVrms (fix)
KV-36HS20
KV-36HS20H
KV-32HS20
KV-36XBR450
KV-32XBR450
KV-36XBR450H
120V, 60Hz
4
3
2
6
2
1
YES
7.5W x 4
245W
2W
898 x 678 x 579.5 mm
994 x 754.5 x 622 mm
35 3/8 x 26 3/4 x 27 7/8 in
39 9/64 x 29 45/64 x 24 1/2 in
84 kg
108 kg
185 lbs.
238 lbs.
Power Requirements
Number of Inputs/Outputs
Video 1)
S Video 2)
Y, PB, PR 3)
Audio 4)
Audio Out 5)
Monitor Out
Control-S (in/out)
Speaker Output (W)
Power Consumption (W)
In Use (Max)
In Standby
Dimensions (W x H x D)
mm
in
Mass
kg
lbs
TruSurroundTM
by
SRS
®


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KV-32HS20/36HS20/36HS20H/32XBR450/36XBR450/36XBR450H
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.


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KV-32HS20/36HS20/36HS20H/32XBR450/36XBR450/36XBR450H
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
1.5 k
Trouble Light
AC Outlet Box
Ohmmeter
Cold Water Pipe
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 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 A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.