Sony Trinitron KV-8AD10 User manual

MICROFILM
Canadian Mav
Chassis No. SCC-C40A-A
Note: The service manual for RM-759 has
been issued separately.
Television system
Channel coverage
Picture tube
Antenna
Inputs
Output
Power requirements
SPECIFICATIONS
American TV standard
VHF channels 2-13
UHF channels 14-69
Trinitron tube
8-inch picture measured diagonally
9-inch picture tube measured diagonally
70-degree deflection
VHF/UHF telescopic antenna
VIDEO IN VIDEO: phono jack
1 Vp-p, 75 ohms
VIDEO IN AUDIO: phono jack
~5 dBs, 47 kohms
EXT ANT/CAMCORDER IN: minijack
75 ohms
HEADPHONES: minijack
120 V AC, 60 Hz
12 V DC
Power consumption
Dimensions
Weight
Accessories supplied
Optional accessories
MODELS OF THE SAME SERIES
KV-8AD10
AC IN: 33 W max.
DC IN: 26 W max.
Approx. 220 x 213 x 31) mmn (w/h/d)
(8°/4 x 8'/2 x 12's inches)
Approx. 4.5 kg (8 Ib 1! oz) ,
RM-759 Remote Comnancler with
2 size AA(R6) batteies (1)
AC power cord (1)
Antenna connector (1
Car battery cord (1)
Connecting cord VMC710M/720M
Car antenna VCA-3W,VCA.-4
Design and specifications are subject to changewittnout notice.
TRINITRON.. COLOR TV
SONY.

TABLE OF CONTENTS
Section Title Page
1. GENERAL
1-1. Nameand Locationof Controls ........ 3
1-2. First Choose Your Power Source ....... 4
1-3. Howto Watchthe TV ..............0,. 5
1-4. If You Want to Connect and External
Antenna: ojo. Ste) tS echheb e Bee hee 6 as 6
2. DISASSEMBLY
2-1. Upper Cabinet Ass’y Removal ......... 8
2-2. D Board Removal ................. 8
2-3. Picture Tube Removal .............. 9
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ................0... 10
3-2. Convergence ...... 05.0 ee eee 1]
3235. SFOCUS)- M5. od ees eR GA DR lSca 12
3-4. White Balance .................0.. 12
4. SAFETY RELATED ADJUSTMENTS ........ 14
5. CIRCUIT ADJUSTMENT
5-1. A Board Adjustments ............... 16
5-2. D Board Adjustments ............... 17
6. DIAGRAMS
6-1. Circuit Boards Location ............. 18
6-2. Printed Wiring Boards and Schematic
Diagram, 4.65 frase hai en he Os 18
6-3. Semiconductors ................... 28
7. EXPLODEDVIEW .................... 29
8. ELECTRICAL PARTSLIST .............. 30
WARNING !! ATTENTION!
ISOLATION TRANSFORMER SHOULD BE USED
AN
DURING ANY SERVICE TO AVOID POSSIBLE SHOCK
HAZARD, BECAUSE OF LIVE CHASSIS.
THE CHASSIS OF THIS RECEIVER IS DIRECTLY CON-
NECTED TO THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARK
A ON THE SCHEMATIC DIAGRAMS, EXPLODED
VIEWS AND IN THE PARTS LIST ARE CRITICAL TO
SAFE OPERATION. REPLACE THESE COMPONENTS
WHITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL TO SAFE OPERATION ARE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO-
CEDURES WHENEVER CRITICAL COMPONENTS ARE
FREPLACED OR IMPROPER OPERATION IS SUSPECTED.
AFIN D’EVITER TOUT RISQUE D'ELECTROCUTIUN
PROVENANT D’UN CHASSIS SOUS TENSION, UN
TRANSFORMATEUR D'ISOLEMENT ODOIT EIRE
UTILISE LORS DE TOUT DEPANNAGE.
LE CHASSIS DE CE RECEPTEUR EST DIRECTEMIN T
RACCORDE A L’ALIMENTATION SECTEUR,
ATTENTION AUX COMPOSANTS RELATIFS A LA
SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAMEE T
PAR UNE MARQUE (/\ SUR LES SCHEMAS DE PRINCPE,
LES VUES EXPLOSEES ET LES LISTES DE PIEtES
SONT D’UNE IMPORTANCE CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT. NE LES RiM-
PLACER QUE PAR DES COMPOSANTS SONY DONTL E
NUMERO DE PIECE EST INDIQUE DANS LE PRESIN T
MANUEL OU DANS DES SUPPLEMENTS PUBLIES AR
SONY. LES REGLAGES DE CIRCUIT DONT L’IMP)F3-
TANCE EST CRITIQUE POUR LA SECURITE pw
FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES Liz S
DE CHAQUE REMPLACEMENT DE COMPOSAITS
CRITIQUES, OU LORSQU’UN MAUVAIS FONCTION E=-
MENT EST SUSPECTE.

1-1. NAME AND LOCATION OF CONTROLS
Front
VOLUME buttons
CHANNEL buttons
POWER switch
POWER lamp
——~TVIVTR button
Remote control detector
© HEADPHONES jack
(minijack)
PICTURE control
HUE control
———-= COLOR control
peas
-—-~BRIGHT
(brightness)
controt
SECTION 1
GENERAL
Rear
Telescopic antenna
AC IN 120 V socket
VIDEO IN VIDEO jack
(phono type)
VIDEO IN AUDIO jack
(phono type)
DC IN 12 V jack (minijack)
EXT ANT (external antenna)/
CAMCORDER IN jack
(minijack)

1-2.
FIRST
CHOOSE
YOUR
POWER
SOURCE
Remote
Commander
When
using
the
house
current
DISPLAY button
VOL
(volume)
CH
(channel)
buttons
buttons
POWER switch
to AC IN
120 V
to a wall outlet
(120 V AC)
AC power cord
(supplied)
When
using
a
car
battery
How to insert the batteries
2
Insert
two
size
AA
(R6)
batteries
with
correct
polarity
1 Open the lid.
to a cigarette
to DC IN 12 Vv lighter socket
eplace the lid.
Car battery cord (supplied)
Notes
Notes
.
;
ov
*
In
normal
operation,
batteries
will
last
up
to
Be
sure
that
there
are
no
obstructions
between
2
Esselte
ge
for
negative
ground
1
half
a
year.
If
the
unit
does
not
operate
the
Commander
and
the
TV.
*
Use
eck
the
su
ais
car
battery
cord
properly,
the
batteries
might
be
exhausted.
*
Operable
range
is
limited.
isha
tactured
By
‘Sony
Polarity
of
the
plugs
of
-
Replace
all
with
new
ones.
*
If
a
Remote
Commander
not
recommended
is
other
manufacturers
may
be
different
oo;
*
To
avoid
damage
from
possible
battery
leakage,
used
to
operate
this
TV,
or
if
the
supplied
:
aoe
thw
tealteckda
tae
onpainecr
adew.
<t
Remote
Commander
is
Used
to
operate
another
Polarity
of
the
periods,
TV,
the
TV
may
not
operate
properly.
Sony plug

1-3. HOW TO WATCH THE TV
For each of the steps below, you can press either the buttons on the TV or the ones on the
Remote Commander.
1 Turn on the TV.
Press POWER.
The power lamp fights.
e If the “VIDEO” indication is displayed on
the screen, press TV/VIDEO so that the
indication disappears.
Remote control
detector
Select the desired
channel.
Each time CHANNEL (or CH) + or — is
pressed, the adjacent channel is
automatically tuned in.
On-screen display while tuning
VHF channel
numbers
indicates channel tuned in
When no additional channel is received in
the VHF band, the on-screen display
changes.
44-30---50--63--
j= |
UHF channei
numbers
3 Adjust the antenna.
Pull out the telescopic antenna and adjust its
length and direction until the picture ts
clearest.
4 Adjust the volume.
For higher volume, press “+”.
For lower volume, press "“—".
HEE
for lower for higher
volume volume
To turn off the TV
Press POWER again.
To make the channel numbers and a bar
appear on the screen for 3 seconds
Press DISPLAY. If the unit is in video
mode, the “VIDEO” indication will
appear. © HEADPHONES
To listen with a pair of headphones
Connect the optional headphones to the
© HEADPHONES jack. The sound is
monaural.
DISPLAY

1-4.
IF
YOU
WANT
TO
CONNECT
AN
EXTERNAL
ANTENNA
How
to
adjust
the
picture
When
connecting
an
outdoor
antenna
for more for less
brightness brightness
cy
BRIGHT
colors
become
dark
colors
become
fight
oy
COLOR
skin tones skin tones
become become
greenish purplish
Oy
HUE
for more for less
picture picture
contrast contrast
PICTURE
lf
you
cannot
obtain
satisfactory
reception
with
the
telescopic
antenna,
use
an
external
antenna.
UHF/VHF combination
antenna
300-ohm
twin lead cable
to EXT ANT/
CAMCORDER IN
Antenna connector
(supplied)
When connecting a car antenna
a
ls
ne
to EXT ANT/
CAMCORDER IN
VCA-4
(optional)

KV-8AD10
RM-759
SECTION 2
DISASSEMBLY
Y
@) Upper cabinet ass‘y Le |
i
| 7
|
Rol
2-1. UPPER CABINET ASS’'Y REMOVAL
er
@) two screws
(BVTP4x 16)
2-2. D BOARD REMOVAL
GQ) F board ©) D board SN
(3) connector cover
(5) two claws
@) anode cap
e
@ speaker

2-3.
PICTURE
TUBE
REMOVAL
@)
€
board
(2) deflection yoke
@) two screws
(4) two screws
CRT shield
6) picture tube
bezel ass’y
® REMOVAL OF ANODE CAP
Removing Procedures
@
Turn
up
one
side
of
the
rubber
cap
in
the
direction
indicated by the arrow (a).
® Using 4 thumb, pull up the mbber cap firmly in the
direction indicated by the arrow‘).
@ When one side of the rubber cap is separated from the
anode button, the anode cap can be removed by turning
up the rubber cap and pulting up it in the direction of the
arrow).
Anode button —9—

SECTION 3
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.
Controls and switch should be set as follows unless
otherwise noted :
PICTURE controls srr click position
BRIGHTNESS control:--::: click position
3-1. BEAM LANDING
Preparation :
eFeed in the white pattern.
¢Before starting, degauss the entire screen.
1. Turn on set power supply and receive an all-white
signal.
2. Evenly degauss ‘the entire screen.
3. Loosen the deflection yoke mounting screw, and
set the purity control to the center as shown in
Fig. 3-1.
4, Set BKG VR @ to maximum and set © and ©
to minimum.
5. Move the deflection yoke back, and adjust the
Purity control so that @ is in the center and ©
and © are at the sides, evenly. (Fig. 3-2.)
6. Move the deflection yoke forward so that the
entire screen is red.
* If the deflection yoke is pushed all the way to
the CRT then moved slightly forward, landing
adjustment is easier.
7. Substitute ©, then © for @ in step 4 and check
landing.
8. Rotate @, © and @ once each and check landing.
9. When landing is not right, adjust the purity control
and use magnets as shown in Fig. 3-3 then repeat
steps 7 and 8.
10.When a magnet is used, be sure to perform step
2, and tighten deflection yoke mounting screw
loosely.
&, 10 purity control
3, 10 screw
Note, The numbers (3—10) show above steps.
Perform the adjustments in order as follows:
3-1. Beam Landing
3-2. Convergence
3-3. Focus
3-4. White Balance
Note: Test Equipment Required.
1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
purity contro!
TWO
g
>» =
Sy
c
XWM“iMi» WWW
Fig. 3-2.
Purity contral
corrects this area.
Disk magnets
or rotatable
disk magnets
correct these
areas (a—d),
y yp,
Uy, We
WZ
Deflection yoke posi:
tioning corrects these.
-™~ ‘
NN
“
'
|
|
!
|
i
1
i
'
L
Fig. 3-3.

KV-8AD10
___RM-759
Preparation
:
4.
When
the
V.STAT
magnet
is
moved
in
thi
¢
Before
starting,
perform
FOCUS,
H.SIZE,
V.SIZE
and
direction
of
arrow
@
and
©,
Red,
Green
and
Blu
V.LIN
adjustments.
dots
move
as
shown
below.
¢
Turn
BRIGHTNESS
control
to
fully
counterclockwise
@
®
©
and
PICTURE
control
to
click
position.
@
«Feed
in
the
dot
pattern.
a-\i~
B-
B
Oy \® = <iG
(1) Horizontal and Vertical Static Convergence
R R
Center dot
V.STAT Magnet
If
blue
dot
does
not
coincide
with
ref
and
green
dots
perform
following
steps.
Move
BMC
magnet
(a)
to
correct
insufficient
H
static
1.
Adjust
HSTAT
VR
to
coincide
red,
green
and
blue
convergence.
dots
on
the
center
of
screen
(Horizontal
movement)
Rotate
BMC
magnet
(b)
to
corrett
insufficient
V
2.
Adjust
V.STAT
magnet
to
coincide
red,
green
and
static
convergence.
blue
dots
on
the
center
of
screen
(Vertical
In
either
case,
repeat
Beam
Landing
Adjustment.
movement)
:
3.
If
the
red,
green
and
blue
dots
do
not
coincide
ye
manet
on
the
center
of
screen
with
HSTAT
VR,
perform
Y
horizontal
convergence
adjustment
using
H.STAT
oe
se
VR
and
V.STAT
magnet
as
shown
below.(In
this
case,
HSTAT
VR
and
V.STAT
magnet
effect
each
other.)
¢
Tilt
the
V.STAT
magnet
and
adjust
static
convergence
to
open
or
close
the
V.STAT
magnet.
aS

KV-8AD10
RM-759
(2) Dynamic Convergence Adjustment
( Preparation :
¢Before starting, perform Horizontal and Vertical
Static Convergence Adjustment.
1. Remove deflection yoke spacers.
2. Move the deflection yoke for best convergence as
shown.
G26
3. Install the deflection yoke spacers. BGR RGB
3-3. FOCUS 3-4. WHITE BALANCE
(1) Input monoscope signal. eInput dot signal from pattern generator.
PICTURE control «+++ 80% ¢PICTURE control -:++++++: click position
| BRIGHT control +--+: 50% BRIGHTNESS control --click position
(2) Adjust FOCUS control for a best picture at the
center and both sides of the screen. [SCREEN (G2)]
1. Adjust BKG VRs (RV701, RV703, and RV7O5) so
that voltages on the red, green and blue cathodes
are 100Vdc with an oscilloscope as shownin Fig.1.
ron
100 Vde
FOCUS
SCREEN GND
Fig. 1

2. Observe the screen and adjust Screen control to
. obtain the faintly visible background of dot signal.
Note the color that first becomes visible by turning
SCREEN control. ,
Do not turn a BKG control for this color.
(WHITE BALANCE]
1. Input entirely white signal from pattern generator.
2. Set the PICTURE control to obtain the faintly
visible raster on the screen.
3. Observe the screen and adjust the other two BKG
VRs for best white balance.
4. Set the PICTURE control at maximum.
5. Observe the screen and adjust the DRIVE VRs
~ (RV702, RV704) for best white balance.
6. Repeat steps 2 through 5 several times.
LA
KV-8A
R
0
=
12 oO

KV-8AD10
RM-759
SECTION 4
SAFETY RELATED ADJUSTMENTS
bY R821, R822 CONFIRMATION METHOD (HOLD-
DOWN CONFIRMATION) AND READJUSTMENTS
When replacing the following components (marked with f@
on the schematic diagram), always perform the adjustment
as follows:
I¢201, D501, D806, C506, C510, C810, R505, R506, R508,
R806, R807, R808, R821, R822, T802 (FBT)
(1) Preparation before confirmation
1. Turn the POWER switch ON, and receive entirely
color-bar signals and set the PICTURE and
BRIGHTNESS controls to center click.
2. Confirm that the voltage of TP86 is more than 30.5V
when the set is operating normally with 120V AC supply.
(2) Hold-down operation confirmation
l, Turn the POWER switch ON, and receive entirely
white signals and set the PICTURE and BRIGHTNESS
controls to center click.
2. Apply DC voltage of over 42.4V gradually to TP86 via
1T40 from the DC stavilized power source. Confirm
that the minimum voltage is less than 42.5V DC whereby
the raster disappears during the hold-down circuit
operation.
NOTE: When the hold-down circuit starts operating,
switch OFF the POWER of the set immediately.
(3) Hold-down readjustment
When step (2) is not satisfied, readjustment should be
performed by altering the resistance value of R821, 822 (a
component marked with B).
(4) Confirmation of hold-down erroneous operation
1. Turn the POWER switch ON, and receive dot signals
and set the PICTURE and BRIGHTNESS controls to
minimum.
2. Confirm that the hold-down circuit does not operate
by turning the POWER switch ON and OFF repeatedly
several times.
NOTE : If the hold-down circuit starts operating in the
above case, switch OFF the POWER of the set
immediately.
3. Turn the POWER switch ON, and receive dot signals
and entirely white signals, and set the PICTURE and
BRIGHTNESS coritrols to maximum.
4, Confirm that the hold-down circuit does not operate
by performing switchover of the channels of the dot
signals and entirely white signals several times.
NOTE : If the hold-down circuit starts operating in the
above case, switch OFF the POWER of the set
immediately. .
5. If the above-mentioned steps 1 to 4 are not satisfied
reconfirm steps (2) to (4) by altering the R821, 822
smaller resistance value (a component marked with 4).
CONFIRMATION WHEN REPLACING T802 (FLY-
BACK TRANSFORMER)
The following adjustments should always be performed with
reference to whether an X-ray radiation control circuit is
connected or not, when replacing H.V.R. (High-Voltage
Registor)
*This check is to be performed when H.V.R. only is
replaced, and has no relation to the hold-down circuit
readjustment for replacement of parts marked {2.
(1) Connection confirmation
1. Turn the POWER switch ON, and receive entirely
white signals and set the PICTURE and BRIGHTNESS
controls to maximum.
2. When the set is operating normally with 120V AC
supply, confirm that the voltage of TP86 is over 32.0
+1.5V DC.
+B MAX VOLTAGE CONFIRMATION
( R663, R665)
When replacing the following components (marked with [@
on the schematic diagram), perform the adjustment as
follows :
IC651, Q651, D651, R655, R658, R659, R660, R662, RS63,
R664, R665, R667, L651, RV601
1. Supply 13023 V AC to with variable auto-transformer,
2. Receive color-bar signals.
3. Set the PICTURE and BRIGHTNESS controls to center
click.
4. Adjust RV601 (30V ADJ) so as to become maximun.
5. Confirm the voltage of TP91 is less than 33.0V DC,
* Use a digital multimeter whose input impedance over
100M St when confirming the voltage of the protecte
terminal of H.V.R.

KV-8AD10
RM-759
SECTION 5
CIRCUIT ADJUSTMENT
5-1. A BOARD ADJUSTMENTS
A BOARD
(COMPONENT SIDE)
TUNER AGC ADJUSTMENT (RV201)
Receive a color-bar signal.
Connect the digital multimeter across TP15 and
ground.
. Adjust RV201 so that voltage is 6.0+0.3V DC.
SUB CONTRAST ADJUSTMENT (RV301)
. Receive a color-bar signal.
. PICTURE: +rssereseeeeee center click
. Observe the Q301 emitter waveform on the
oscilloscope.
. Adjust RV301 until the black and white signal
level becomes 1.6 + 0.1Vp-p.
Do
co
Onre
ac)
o)
ae
Gq
8) w
PN
black.
\
~—t
1.6 0.1 Vp-p
as
ae
H.sIFT ADJUSTMENT (RV501)
Set
the
V.CENT
(S551)
and
H.CENT
(S801)
on
the
D
board
to
the
best
position.
Set the RV501 to center.
Adjust S801 for best picture.
If
it
is
impossible
with
S801,
adjust
RV501.
roy
.
poh
=416=—
KV-8AD
RM-
5-2. D BOARD ADJUSTMETNS
D
BOARD
(COMPONENT
SIDE)
V.SIZE ADJUSTMENT (RV551)
1. Receive a cross-hatch signal.
2. PICTURE::::+-e++ee+e+ center click
3. Adjust RV551 for best picture.
H.SIZE ADJUSTMENT (L806)
1. Receive a cross-hatch signal.
2. PICTURE: rstereseeeees center click
3. Adjust L806 for best picture.
10

KV-8AD10
RM-759
6-1.
SECTION 6
CIRCUIT
BOARDS
LOCATION
6-2.
PRINTED
WIRING
BOARDS
AND
SCHEMATIC DIAGRAM
Note:
The
components
identified
by
shading
and
mark
A
are
critical
for
safety.
Replace
only
with
part number specified.
Note:
Les
composants
identifies
par
un
trame
et
une
marque
A\sont
critiques
pour
la
sécurite.
Ne
les
remplacer
que
par
une
piece
portant
le
numero
specifie.
Note:
All
capacitors
are
in
&F
unless
otherwise
noted.
p:
uF
5OWV
or
less
are
not
indicated
except
for
electrolytic
and
tantalums.
All resistors are in ohms.
kQ = 10002, MQ = 1000kN
All
resistors
are
in
ohms,
1/4W
unless
otherwise
noted.
kQ
:
10002,
MQ
:
1000k2.
A: internal component.
(__]:
panel
designation.
All
variable
and
adjustable
resistors
have
characteristic
curve
B,
unless
otherwise
noted.
The
components
identified
by
§4
in
this
manual
have
been
carefully
factory-selected
for
each
set
in
order
to
satisfy
regulations
regarding
X-ray
radiation.
Should
replacement
be
required,
replace
only
with
the
value
originally
used.
nonflamable resistor.
DIAGRAMS
a18=
©
When
replacing
components
identified
by
(@
mark
the
necessary
adjustments
indicated.
If
results
do
not
meet
the
specified
value,
change
the
component
identified
by
64
and
repeat
the
adjustment
until
the
specified
value
is
achieved.
(Refer
to
R821,
R822,
R663
and
R665
adjust-
-ment on page 14, 15.)
When
replacing
the
part
in
below
table,
be
sure
to
perform
the
related
adjustment.
1C201, D501, D806, C506,
C510, C810, R505, R506,
R508, R806, R807, R808,
R821, R822, T802 (FBT)
1C651, Q651, D651, R655,
R658, R659, R660, R662,
R663, R664, R665, R667,
L651, RV601
R821, R822
(HV HOLD DOWN)
R663, R665 —
(+B MAX)
Readings
are
taken
with
a
colorbar
signal
input.
no mark : VHF IN
(
)
:
VIDEO
IN
Readings
are
taken
with
a
10MQ
digital
multimeter.
Voitages
are
dc
with
respect
to
ground
unless
otherwise
noted.
Voltage
variations
may
b@
noted
due
to
normal
production
tolerances.
All voltages are in V
~~ : Can not be measured,
Circled numbers are waveform references.
: B + bus.
-—-— > B — bus.
: signal path.
:
|:
adjustrnent
for
redair
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