Toshiba 2163 DB Manual

TOSHIBA 2163 DB

General Information

C6S Chassis
Safety Instructions 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.
WARNING: BEFORE SERVICING THIS
5. When replacing wires or components to
CHASSIS, READ THE "X-RAY RADIATION
terminals or tags, wind the leads around the
PRECAUTION", "SAFETY PRECAUTION" AND
terminal before soldering. When replacing
"PRODUCT SAFETY NOTICE" INSTRUCTIONS
safety components identified by the interna-
BELOW.
tional hazard symbols on the circuit diagram
and parts list, it must be a Toshiba approved
X-RAY RADIATION PRECAUTION
type and must be mounted as the original.
6. Keep wires away from high temperature
1. The E.H.T. must be checked every time the
components.
receiver is serviced to ensure that the C.R.T.
does not emit X-ray radiation as result of
PRODUCT SAFETY NOTICE
excessive E.H.T. voltage. The nominal E.HT.
for this receiver is 28.1 kV at zero beam
Many electrical and mechanical components in
current (minimum brightness) operating at
this chassis have special safety-related
220V a.c. The maximum E.H.T. voltage
characteristics. These characteristics are often
permissible in any operating circumstances
passed unnoticed by a visual inspection and the
must not exceed 29.5 kV. When checking the
X-ray radiation protection afforded by them
E.H.T., use the 'High Voltage Check' proce-
cannot necessarily be obtained by using
dure in this manual using an accurate E.H.T.
replacements rated at higher voltages or
voltmeter.
wattage, etc. Components which have these
2. The only source of X-RAY radiation in this
special safety characteristics in this manual and
receiver is the C.R.T. To prevent X-ray
its supplements are identified by the interna-
radiation, the replacement C.R.T. must be
tional hazard symbols on the schematic
identical to the original fitted as specified in
diagram and parts list. Before replacing any of
the Parts List.
these components read the parts list in this
3. Some components used in this receiver have
manual carefully. Substitute replacement
safety related characteristics preventing the
components which do not have the same safety
C.R.T. from emitting X-ray radiation. For
characteristics as specified in the parts list may
continued safety, replacement component
create X-ray radiation.
should only be made after referring the
Product Safety Notice below.
Installation and Service
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
GENERAL INFORMATION
the back removed. Do not attempt to service
this receiver if you are not conversant with the
All adjustments are thoroughly checked and
precautions and procedures for working on
corrected when the receiver leaves the factory.
high voltage equipment. When handling or
Therefore the receiver should operate normally
working on the C.R.T., always discharge the
and produce proper colour and B/W pictures
anode to the receiver chassis before remov-
upon installation. However, several minor
ing the anode cap. The C.R.T., if broken, will
adjustments may be required depending on the
violently expel glass fragments. Use shatter
particular location in which the receiver is
proof goggles and take extreme care while
operated.
handling. Do not hold the C.R.T. by the neck
This receiver is shipped completely in card-
as this is a very dangerous practice.
board carton. Carefully draw out the receiver
2. It is essential that to maintain the safety of the
from the carton and remove all packing
customer all cable forms be replaced exactly
materials. Plug the power cord into a conven-
as supplied from factory.
ient 220 volts 50 Hz AC two pin power outlet.
3. A small part of the chassis used in this
Turn the receiver ON. Check and adjust all the
receiver is, when operating, at approximately
customer controls such as BRIGHTNESS,
half mains potential at all times. It is therefore
CONTRAST and COLOUR Controls to obtain
essential in the interest of safety that when
natural colour or B/W picture.
serving or connecting any test equipment the
Recommended Safety Parts
Item Part 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 Instuctions / Installation & Service Adjustments / Adjustments Cont'd / Safety Parts / Service Mode / Electrical Adjustments ...Cont'd
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.
Adjustments
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.
AV Diagram / Differences Table / Main Diagram / Text Diagram / CRT Diagram
1
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.
1. ENTERING TO SERVICE MODE
7. Detach the temporarily mounted wedge and
put it in another upper space. Stick it on
picture tube to fix the yoke. 1) Press
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.
Sound Mute
2) Press
3) Keep pressing the
button on TV set.
RCUT
40H
2. DISPLAYING THE ADJUSTMENT MENU
Press MENU button on TV.
Adjustment mode
Fig. 2
RCUT
Centre Convergence by Convergence
40H
Magnets
3. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL
the adjustment items in the following order.
( button for reverse order.)
4. ADJUSTING THE DATA
Pressing of VOLUME
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.
RTV servis Horvat
Tel:
Tel/fax: ++385-31-856-139
Mob:
www.rtv-horvat-dj.hr
Fig. 3. Dot Movement Pattern

Service Mode

button once on Remote Control.
button again to keep pressing.
button, press MENU
S
Normal operation mode
Address S
Press
Data
Press
button changes
or button will change
++385-31-856-637
098-788-319