1
TOSHIBA 2163 DB
Safety Instuctions / Installation & Service Adjustments / Adjustments Cont’d / Safety Parts / Service Mode / Electrical Adjustments ...Cont’d
AV Diagram / Differences Table / Main Diagram / Text Diagram / CRT Diagram
General Information
C6S Chassis
Recommended Safety Parts
ItemPart No.
Description
L462
DY, Supplied with V901
L901
23200205
Coil, Degaussing, TSB-2333AR
T401
23224983
Transformer, Horiz. Drive,TLN1039
T461
23236510
Transformer, Flyback, TFB4123BE
T801
23211858
Line Filter, TRF3139
T862
23217346
Transformer, Converter, TPW3365AR
Q404
23314375
Transistor, 0N4409(508D)
Q862
A8643108
Photo Coupler, TLP621(GR-LF)
F470
23144501
Fuse, 0.8A
F801
23144507
Fuse, 3.15A
P801
23372012
Power Cord
F801
23344395
Switch, Power
V901A
23902067
Socket, CRT, 10P
V901
23312670
Picture Tube, A51EAL155X01
Safety Instructions
WARNING: BEFORE SERVICING THIS
CHASSIS, READ THE “X-RAY RADIATION
PRECAUTION”, “SAFETY PRECAUTION” AND
“PRODUCT SAFETY NOTICE” INSTRUCTIONS
BELOW.
X-RAY RADIATION PRECAUTION
1. The E.H.T. must be checked every time the
receiver is serviced to ensure that the C.R.T.
does not emit X-ray radiation as result of
excessive E.H.T. voltage. The nominal E.HT.
for this receiver is 28.1 kV at zero beam
current (minimum brightness) operating at
220V a.c. The maximum E.H.T. voltage
permissible in any operating circumstances
must not exceed 29.5 kV. When checking the
E.H.T., use the ‘High Voltage Check’ proce-
dure in this manual using an accurate E.H.T.
voltmeter.
2. The only source of X-RAY radiation in this
receiver is the C.R.T. To prevent X-ray
radiation, the replacement C.R.T. must be
identical to the original fitted as specified in
the Parts List.
3. Some components used in this receiver have
safety related characteristics preventing the
C.R.T. from emitting X-ray radiation. For
continued safety, replacement component
should only be made after referring the
Product Safety Notice below.
SAFETY PRECAUTION
1. This receiver has a nominal working E.H.T.
voltage of 26.0 kV. Extreme caution should be
exercised when working on the receiver with
the back removed. Do not attempt to service
this receiver if you are not conversant with the
precautions and procedures for working on
high voltage equipment. When handling or
working on the C.R.T., always discharge the
anode to the receiver chassis before remov-
ing the anode cap. The C.R.T., if broken, will
violently expel glass fragments. Use shatter
proof goggles and take extreme care while
handling. Do not hold the C.R.T. by the neck
as this is a very dangerous practice.
2. It is essential that to maintain the safety of the
customer all cable forms be replaced exactly
as supplied from factory.
3. A small part of the chassis used in this
receiver is, when operating, at approximately
half mains potential at all times. It is therefore
essential in the interest of safety that when
serving or connecting any test equipment the
receiver should be supplied via a suitable
isolating transformer of adequate rating.
4. Replace blown fuses within the receiver with
the fuse specified in the parts list.
5. When replacing wires or components to
terminals or tags, wind the leads around the
terminal before soldering. When replacing
safety components identified by the interna-
tional hazard symbols on the circuit diagram
and parts list, it must be a Toshiba approved
type and must be mounted as the original.
6. Keep wires away from high temperature
components.
PRODUCT SAFETY NOTICE
Many electrical and mechanical components in
this chassis have special safety-related
characteristics. These characteristics are often
passed unnoticed by a visual inspection and the
X-ray radiation protection afforded by them
cannot necessarily be obtained by using
replacements rated at higher voltages or
wattage, etc. Components which have these
special safety characteristics in this manual and
its supplements are identified by the interna-
tional hazard symbols on the schematic
diagram and parts list. Before replacing any of
these components read the parts list in this
manual carefully. Substitute replacement
components which do not have the same safety
characteristics as specified in the parts list may
create X-ray radiation.
Installation and Service
Adjustments
GENERAL INFORMATION
All adjustments are thoroughly checked and
corrected when the receiver leaves the factory.
Therefore the receiver should operate normally
and produce proper colour and B/W pictures
upon installation. However, several minor
adjustments may be required depending on the
particular location in which the receiver is
operated.
This receiver is shipped completely in card-
board carton. Carefully draw out the receiver
from the carton and remove all packing
materials. Plug the power cord into a conven-
ient 220 volts 50 Hz AC two pin power outlet.
Turn the receiver ON. Check and adjust all the
customer controls such as BRIGHTNESS,
CONTRAST and COLOUR Controls to obtain
natural colour or B/W picture.
AUTOMATIC DEGAUSSING
A degaussing coil is mounted around the picture
tube so that external degaussing after moving
the receiver is normally unnecessary, providing
the receiver is properly degaussed upon
installation. The degaussing coil operates for
about 1 second after the power to the receiver is
switched ON. If the set is moved or faced in a
different direction, the power switch must be
switched off at least 30 minutes in order that the
automatic degaussing circuit operates properly.
Should the chassis or parts of the cabinet
become magnetized to cause poor colour purity,
use an external degaussing coil. Slowly move
the degaussing coil around the faceplate of the
picture tube, the sides and front of the receiver
and slowly withdraw the coil to a distance of
about 2 m before disconnecting it from AC
source. If colour shading still persists, perform
the COLOUR PURITY ADJUSTMENT and
CONVERGENCE ADJUSTMENTS procedures.
HIGH VOLTAGE CHECK
CAUTION: There is no HIGH VOLTAGE
ADJUSTMENT on this chassis.
1. Connect an accurate high voltage meter to
the second anode of the picture tube.
2. Turn on the receiver. Set the BRIGHTNESS
and CONTRAST Controls to minimum (zero
beam current).
3. High voltage will be measured below 29.5 kV.
4. Rotate the BRIGHTNESS Control to both
extremes to be sure the high voltage does not
exceed the limit of 29.5 kV under any
conditions.
FOCUS ADJUSTMENT
Adjust FOCUS Control on FLYBACK TRANS.
(T461) for well defined scanning lines in the
centre area on the screen.
Set-up Adjustment
The following adjustments should be made
when a complete realignment is required or a
new picture tube is
installed.
Perform the adjustments in order as follows
1. Color Purity
2. Convergence
3. White Balance
Note: The PURITY/CONVERGENCE MAGNET
assembly and rubber wedges need mechanical
positioning. Refer to figure 1.
COLOR PURITY ADJUSTMENT
NOTE: Before attempting any purity adjust-
ments, the receiver should be operated for at
least fifteen minutes.
1. Demagnetize the picture tube and cabinet
using a degaussing coil.
2. Set the brightness and contrast to maximum.
3. Use a green raster from among the built-in
test signals. See page 12.
4. Loosen the clamp screw holding the yoke and
slide the yoke backward or forward to provide
vertical green belt (zone) in the picture
screen.
5. Remove the Rubber Wedges.
6. Rotate and spread the tabs of the purity
magnet (See figure 2.) around the neck of the
picture tube until the green belt is in the
center of the screen. At the same time, enter
the raster vertically.
7. Slowly move the yoke forward or backward
until a uniform green screen is obtained.
Tighten the clamp screw of the yoke tempo-
rarily.
8. Check the purity of the red and blue raster.
Fig. 1
CONVERGENCE ADJUSTMENTS
NOTE: Before attempting any convergence
adjustments, the receiver should be operated for
at least fifteen minutes.
CENTRE CONVERGENCE ADJUSTMENT
1. Use the cross-dot pattern from among the
built-in test signals.
2. Set the brightness and contrast for well
defined pattern.
3. Adjust two tabs of the 4-Pole Magnets to
change the angle between them (See figure
2.) and superimpose red and blue vertical
lines in the centre area of the picture screen.
4. Turn the both tabs at the same time keeping
the angle constant to superimpose red and
blue horizontal lines at the center of the
screen.
5. Adjust two tabs of 6-Pole Magnets to superim-
pose red/blue line and green one. Adjusting
the angle affects the vertical lines and rotating
both magnets affects the horizontal lines.
6. Repeat adjustments 3, 4, 5 keeping in mind
red, green and blue movement, because 4-
Pole Magnets and 6-Pole Magnets have
mutual interaction and make dot movement
complex.
CIRCUMFERENCE CONVERGENCE
ADJUSTMENT
1. Loosen the clamping screw of deflection yoke
slightly to allow the yoke to tilt.
2. Temporarily put a wedge as shown in figure 1.
(Do not remove cover paper on adhesive part
of the wedge.)
3. Tilt front of the deflection yoke up or down to
obtain better convergence in circumference.
(See figure 3.) Push the mounted wedge into
the space between picture tube and the yoke
to fix the yoke temporarily.
4. Put other wedge into bottom space and
remove the cover paper to stick.
5. Tilt front of the yoke right or left to obtain
better convergence in circumference. (See
figure 3.)
6. Keep the yoke position and put another
wedge in either upper space. Remove cover
paper and stick the wedge on picture tube to
fix the yoke.
7. Detach the temporarily mounted wedge and
put it in another upper space. Stick it on
picture tube to fix the yoke.
8. After fixing three wedges, recheck overall
convergence. Tighten the screw firmly to fix
the yoke and check the yoke is firm.
9. Stick three adhesive tapes on wedges as
shown in figure 1.
Fig. 2
Centre Convergence by Convergence
Magnets
Fig. 3. Dot Movement Pattern
Service Mode
1. ENTERING TO SERVICE MODE
1) Press
button once on Remote Control.
Sound Mute
2) Press
button again to keep pressing.
3) Keep pressing the
button, press MENU
button on TV set.
RCUT S
40H
2. DISPLAYING THE ADJUSTMENT MENU
Press MENU button on TV.
Adjustment mode
Normal operation mode
RCUT
Address
S
40H
Data
3. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL
▲
button changes
the adjustment items in the following order.
(
▼
button for reverse order.)
4. ADJUSTING THE DATA
Pressing of VOLUME
▲
or
▼
button will change
the value of data in the range from 00 to FF. The
variable range depends on the adjusting item.
5. EXIT FROM SERVICE MODE
Press POWER button to turn off the TV once.
Press
Press
RTV servis Horvat
Tel: ++385-31-856-637
Tel/fax: ++385-31-856-139
Mob: 098-788-319
www.rtv-horvat-dj.hr
