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SERVICEMANUAL
US Model
KV-27XBR35
Chassis No.
KV-32XBR35
Chassis No.
Canadian Model
KV-27XBR35
.
Chassis No.
KV-32XBR35
Chassis No.
(Photo :
CHASSIS
SPECIFICATIONS
Antenna
Input jacks
Television
system
American TV standards
Channel coverage
VHF: 2-13
UHF:
1669
Picture tube
CABLE TV: 1-125
tube
27-inch picture measured diagonally
29-inch picture tube measured diagonally
(KV-27XBR35)
32-inch picture measured diagonally
picture tube measured diagonally
(KV-32XBR35)
75 ohm external antenna
terminal for VHF/UHF
VIDEO IN 1, 2 and 3
VIDEO IN
mini DIN)
Y : 1 Vp-p, 75-ohms unbalanced,
sync negative
C : 0.286 Vp-p (Burst signal)
Video (phono jacks) : 1 Vp-p, 75-ohms
unbalanced, sync negative
Audio (phono jacks) :
500 mVrms (100% modulation)
Impedance : 47 kilohms
Output jacks
MONITOR OUT
VIDEO
MONITOR
OUT
mini DIN)
Y: 1 Vp-p, 75-ohms
unbalanced, sync negative
Video (phono jacks) : 1 Vp-p, 75-ohms
unbalanced, sync negative
Audio (phono jacks) : 500 mVrms
(100% modulation)
Impedance : 10 kilohms
AUDIO
OUTPUT
(VARIABLE)
(phono jacks)
More than 900 mVrms (100%
modulation) at the maximum volume
setting (variable)
Impedance : 5 kilohms
.
AUDIO
LINE
OUT
(phono jacks)
900 mVrms (100% modulation)
Impedance : 5 kilohms
Continued on next page
TV


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Speaker output
Speaker size
Audio frequency response
Power
requirements
Power
consumption
Dimensions (w/h/d)
Weight
Supplied accessories
13W X2 (8 ohms)
Tweeter 25 mm
(1 in.) X2 units
Woofer
100 mm (4
units
Tweeter 8
Woofer 50 Hz-8
120 V AC, 60 Hz
(KV-27XBR35)
250W
(KV-32XBR35)
225W
(KV-27XBR35)
Approx.
mm
inches)
(KV-32XBR35)
Approx. 870
663 X 575.2 mm
inches)
(KV-27XBR35)
Approx.
(125 lb 15
(KV-32XBR35)
Approx.
(170 lb 7 oz)
Remote Commander
RM-Y113 (1)
with 2 size AA (R6)
EVEREADY batteries
Wireless headphones
TDR-IF310
(1) with 2 size AA (R6)
EVEREADY batteries
(CAUTION)
(ATTENTION)
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.
APRES
DECONNECTE
LE
CAP
DE
L'ANODE,
L'ANODE DU TUBE CATHODIQUE ET
DE L'ANODE DU CAP AU CHASSIS
DE
L'APPAREIL, OU AU COUCHE DE
SUR LE
TUBE CATHODIQUE OU AU
DU TUBE
CATHODIQUE.
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.
Optional accessories
U/V mixer EAC-66
Connecting cable
RK-74A
TV stand SU-27XBR3
(KV-27XBR35)
TV stand SU-32XBR3
(KV-32XBR35)
Design and specifications are subject to change without notice.
ATTENTION!!
D'EVITER
TOUT
RISQUE
D'ELECTROCUTION
PROVENANT
D'UN
TENSION,
UN
TRANSFORMATEUR
D'ISOLEMENT
ETRE
LE
DE CE
EST
A L'ALIMENTATION
SAFETY-RELATED COMPONENT WARNING !!
ATTENTION
AUX
COMPOSANTS
COMPONENTS IDENTIFIED BY SHADING AND MARK
ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS
LIST ARE CRITICAL TO 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
CRITICALTOSAFE OPERATION ARE IDENTIFIED
MANUAL.
FOLLOW
THESE
PROCEDURES
WHENEVER
CRITICAL
COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS
SUSPECTED.
2
LES
COMPOSANTS
PAR UNE TRAME ET PAR
UNE MAPQUE
A SUR LES
DE PRINCIPE, LES
VUES
ET LES
DE PIECES CONT D'UNE
IMPORTANCE
CRITIQUE
POUR
LA
DU
FONCTIONNEMENT.
NE
LES
REMPLACER
QUE
PAR
DES
COMPOSANTS SONY DONT LE
DE
EST
DANS
LE
MANUEL
OU
DANS
DES
PAR SONY. LES
DE
CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA
DU
FONCTIONNEMENT
SONT
IDENTIFIES
DANS
LE
MANUEL.
CES
LORS
DE
CHAQUE
REMPLACEMENT
DE
COMPOSANTS
CRITIQUES,
OU
LORSQU'UN
FONCTIONNEMENT
EST


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TABLE OF CONTENTS
Section
1.
GENERAL
l-l.
Locating Controls and Connectors ............................
5
l-2.
...................................
l-3.
.......................................
.........................................
..........................................
...................................
l-7.
a Picture and Sound Mode ........................
15
1.8.
Watching Two Pictures at Once (PIP) ........................
16
.................................................
...............................
............................
l-12. Setting Favarite Channel ........................................
l-l 3. Using the Pre-Programmed Remote Commander ........
29
...................................................
32
2.
DISASSEMBLY
2-l.
...........................................
33
2-2.
Chassis Assy and H Bracket Removal .......................
33
P3
..............................................
34
.............................................
34
.............................................
35
2-6.
.................................................
35
2-7.
...............................................
36
.................................................
36
2-9.
..................................................
37
...................................................
38
2-l
Degaussing Coil Removal (KV-27XBR35)
36
...........................................
2-13. Repair of Chip Component Circuit Board ....................
40
3.
SET-UP ADJUSTMENTS
3-l.
.....................................................
45
.....................................................
46
.......................................
3-4.
G2 (Screen) and White Balance Adjustments ..............
50
Section
Title
4.
5.
SAFETY RELATED ADJUSTMENTS ..................
51
CIRCUIT ADJUSTMENTS
5-l.
5-2.
5-3.
5-4.
5-5.
6.
Electrical Adjustment by Remote
............
55
.............................................
...........................................
P3
...........................................
VC Board Adjustment
only)
62
DIAGRAMS
6-l.
6-2.
6-3.
6-4.
6-5.
6-6.
6-7.
6-8.
...............................................
63
(2) ...............................................
65
(3) ...............................................
67
(4) ...............................................
.....................................
75
........................................
78
Printed Wiring Boards and Schematic Diagrams ..........
78
...................................................
7.
EXPLODED VIEWS
7-l.
..............................................................
7-2.
Picture
Tube ........................................................
6.
ELECTRICAL PARTS LIST ................................
ACCESSORY
1.
..........................................................
2.
..................................................
3.
.................................................
4.
DIAGRAMS
4-l.
............................................
.............................................
5.
..............................................
6.
...................................


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SAFETY
CHECK-OUT
(US Model only)
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 contact 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, par-
ticularly
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 replace-
ment .
6. Check the line cord for cracks and abrasion.
Recommend the replacement of any such line
cord to the customer.
7.
Check the condition of the
antenna
(if any).
Make sure the end is not broken off, and has
the plastic cap on it. Point out the danger of
impalement on a broken antenna to the
customer,
and
recommend
the
antenna's
replacement.
8.
Check the B+ and HV to see they are at the
values specified. Make sure your instruments
are accurate; be suspicious of your HV meter
if sets always have low HV.
9.
Check the antenna terminals, metal trim,
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
Leakage
current can be measured by any one of three
methods.
1.
A commercial leakage tester, such as the
Simpson 229 or RCA WT-S40A. Follow the
manufacturers' instructions to use these instru-
ments.
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 volt-
meter.
The "limit" indication is
so
analog meters must have an accurate
voltage scale. The Simpson
and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
HOW TO
A GOOD EARTH GROUND
A cold-water pipe is 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
water pipe with an ohmmeter. The reading should be
zero ohms.
If a cold-water pipe is not accessible,
connect a 60-100 watts 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 of the line, the lamp should light at
normal brilliance if the screw is at ground potential.
(See Fig. B)
To Exposed Me tat
Parts on
I
AC
voltmeter
10.75
Earth Ground
A.
Using an AC voltmeter to check AC leakage.
B.
Checking for earth ground.
Light


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SECTION 1
GENERAL
LOCATING CONTROLS AND CONNECTORS
For
see the pages Indicated by the numbered black
headphones
On-screen menu displays
Channel number display
SLEEP, MUTING displays
Channel caption display
MTS (SAP) mode display
0
>
c
CHANNEL+
POWER
lamp
POWER button*
VOLUME
buttons*
detector
STEREO
Indicator lamp
VIDEO IN 3 lacks
audio
Buttons with the same function are also
located on the Remote Commander
8).
can listen to the
sound and control the
headphones. within a distance
6
AUX
VIDEO IN
TO CONVERTER
VHF/UHF
AR.
AUDIO OUT jacks
LINE OUT jacks
OUT jacks
LOOP OUT jacks