Toshiba 2563 DB, 2863 DB Schematic
TOSHIBA 2563 DB
1
General Information
C6SR Chassis
Also Covers
2863 DB
Safety Notice
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.H.T.
for this receiver is 27.7 kV at zero beam
current (minimum brightness) operating at
240V a.c. The maximum E.H.T. voltage
permissible in any operating circumstances
must not exceed 29.9 kV. When checking the
E.H.T., use the ‘High Voltage Check’ procedure 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 removing 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 international 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 international 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 Xray radiation.
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 cardboard
carton. Carefully draw out the receiver from the
carton and remove all packing materials. Plug
the power cord into a convenient 240 volts 50Hz
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 29.9 kV.
HORIZONTAL CENTRE ADJUSTMENT
1. Receive the UK PHILIPS pattern.
2. Set the contrast and colour to centre, and the
brightness to centre.
3. Adjust H. CENTER USER Control (R452) so
the pattern centre can be located at the
screen centre.
FOCUS ADJUSTMENT
Adjust FOCUS Control on FLYBACK TRANS.
(T461) for well defined scanning lines in the
centre area on the screen.
PAL MATRIX ADJUSTMENT
1. Tune in the colour programme of the Philips
pattern.
2. Set the COLOUR Control to obtain the proper
colour.
3. If the PAL MATRIX adjustment is incorrect,
the Venetian Blind would appear in the colour
bars area. This case needs the adjustment.
4. At the first, adjust DL PHASE ADJ. Coil
(L551) to minimize the Venetian Blind.
5. Next adjust 1H-DL ADJ. VR (R551) to
minimize the Blind.
6. If the Venetian Blind still remains, adjust 1 HDL PHASE ADJ. Coil (L551) to minimize the
Blind again.
7. Repeat the item 5 and 6 procedures, adjust
the R551 and L551 until the Blind does not
appear.
CRT GREY SCALE ADJUSTMENT
1. Tune in an active channel.
2. Set the SERVICE SW. (S202) in the “H. LINE”
position.
3. Turn the SCREEN Control (on T461) fully
counterclockwise.
4. By rotating the RED, GREEN and BLUE CUT
OFF Controls (R557, R558, R559) to the mid
position.
5. Set the GREEN and BLUE DRIVE Controls
(R252, R253) to the center.
6. Rotate the SCREEN Control gradually
clockwise until the first line appears slightly on
the screen. Set the SCREEN Control to this
position.
7. Adjust the CUT OFF Controls to obtain the
slightly lighted horizontal lines in the same
levels of three colours (RED, GREEN and
BLUE). The lines may look like white if the
CUT OFF Controls are adjusted properly.
8. Set the SERVICE SW. (S202) in the “RECEIVE” position.
9. Set the CONTRAST and COLOUR Controls
to minimum, and BRIGHTNESS Control to the
maximum.
10.Adjust the BLUE and GREEN DRIVE
Controls (R252/R253) to obtain proper whitebalanced picture in high light areas.
11.Set the BRIGHTNESS and CONTRAST
Controls to obtain dark grey raster. Then
check the white balance in low brightness. If
the white balance is not proper, retouch the
CUT OFF Controls and DRIVE Controls to
obtain a good white balance in both low and
high light areas.
SUB-BRIGHTNESS ADJUSTMENT
1. Tune in a colour programme.
2. Set the CONTRAST Control to the minimum
and the BRIGHTNESS Control to the centre.
3. Set the COLOUR Control to the centre.
4. Set the SUB-BRIGHT. Control (R255) to the
centre and leave the receiver for five minutes
in this state.
5. Watching the picture well, adjust the SUBBRIGHT. Control in the position where the
picture does not show evidence of blooming
in high bright area and not appear too dark in
low bright portion.
6. Check the proper picture variation by rotating
the CONTRAST and BRIGHTNESS Controls
to both extremes.
7. If the picture does not appear dark with the
CONTRAST and BRIGHTNESS Controls
turned to the minimum, or not appear bright
with the controls turned to the maximum,
adjust the SUB-BRIGHT. Control again for the
acceptable picture.
Electrical Adjustment
MODEL NAME: C6SR
Circuit name: VIDEO/CHROMA
Adjustment Name Setting Input signal Measurement Instrument Adjustment procedure Adjustment standard
parts point
R551 PAL matrix PHILIPS Q501 Synchroscope Adjust (Same as Current)
VR (amplitude) Pattern 62 pin IH-DL ADJ VR (R551) E = 1 + A
to minimize the blind. D = 1 - A
L551 PAL matrix coil PHILIPS Q501 Synchroscope Adjust DL PHASE ADJ Rn + 1
(phase) Pattern 62 pin coil (L551) to minimize Rn
the Venetian Blind.
Cont: MAX Screen Adjust the number of
R255 Sub-bright BRT: Center Sub-bright signal adjustment black collapsed lines in 5 ± 1.5 lines
Color Min. the sub-bright signal.
Screen adjustment R557-R559 ➜ Center 1. Gradually increase the screen brightness until either R, G or B line starts
(Cut-off VR) to light up slightly.
Cut-off adjustment R252, R253 ➜ Center 2. Determine the screen VR adjustment position here.
R557 ~ R559 Service switch ➜ ON 3. Using the cut-off VR (R557-R559), gradually increase remaining two
Screen VR (HORIZ-line) lines until respective line starts to light up slightly. (Adjust until the
Cont: Min screen becomes almost white.)
BRT: Center 4. Turn off the service SW.
Color: Min
Upper screen: *DB, DD, DN, DS models
White HIGH LIGHT (103 cd/m2)
Lower screen: 7195 K - 0.005 uv
Black DARK (17 cd/m2)
7695 K - 0 uv
R557 ~ R559 Color :Center Use a checker which *DF model
R252. R253 White balance BRT: Center CRT W/B checker. adjusts brightness by HIGH LIGHT (103 cd/m2)
CONT: MAX varying modulation ratio. 8750 K - 0.002 uv
DARK (17cd/m2)
8750 K - 0.002 uv
Two-tone signal
(Burst: ON)
MODEL NAME: C6SR
Adjustment part Input point, Output point Adjustment signal Adjustment condition and procedure
Horizontal amplitude WG Philips pattern. 1. Conditions: V. height, VERT position.
adjustment Do not use Philips After H. center adjustment ,set the contrast to max.,
Pin-cushion distortion pattern for FRANCE bright to center and color to center.
Correction amount adjustment Visual adjustment SECAM. 2. Adjustment procedures
Keystone distortion correction with figures on the screen. a. Adjust the horizontal amplitude by the sub-address WID.
amount adjustment (Bus control) • For French model: Adjust the horizontal amplitude so that the
first inner white lines next to the left and right white flag of
Philips pattern just disappear behind the frame.
• For other models: adjust the horizontal amplitude so that the
left and right white flags of Philips pattern just disappear
behind the frame.
b. By the sub-address DPC, make the left and right horizontal
bar straight.
c. By the sub-address KEY, correct the keystone distortion.
d. Again, adjust the sub-address WID.
HEIGHT Visual adjustment with WG Philips pattern 1. Conditions: Cont max, Bright cent, Color cent.
VERT. figures on the screen. Do not use Philips 2. Adjustment procedure
POSITION (Bus control) pattern for FRANCESECAM. a. Change V. Position by the sub-address VPS so that the upper
and lower positions of the circle of Philips pattern come to the
center of the screen.
b. By the sub-address HIT, make the top and bottom flags of
Philips pattern just disappear behind the frame.
>10
> 0.7
Safety Notice / Service Adjustments / Electrical Adjustment / Electrical Adjustments / Service Mode Cont’d / Circuit Block Diagram
Main Diagram 1 ...Cont’d (1) ....Cont’d (2) / Main Diagram 2 ...Cont’d / Main Diagram 3 ...Cont’d (1) ....Cont’d (2) / Main Diagram 4 ...Cont’d
2TOSHIBA 2563 DB
Service Mode Cont’d
1. ENTERING TO SERVICE MODE
1) Press button once on Remote Control.
2) Press button again to keep pressing.
3) Keep pressing the button, press MENU
button on TV set.
MODE
D3H
(Service mode dIsplay)
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CHANNEL ▲ button changes
the adjustment items in the following order. (▼
button for reverse order.)
3. ADJUSTING THE DATA
QA02 ITEM 2563DB 2863DB
MEM NAME Comment Preset Reference Preset Reference
ADR data data data data
S 0D3H MODE MODE DATA DA A9 DA A9
S 0D4H CNTX SUB CONTRAST MAX FF
S 0DSH CNTC SUB CONTRAST CENTER 70 70
S 0D6H CNTN SUB CONTRAST MIN 2B 2B
F 0D7H HIT HEIGHT 2A 40 2A 40
F 0D8H LIN V LINEARITY 11 0E 11 10
S 0D9H VSC V-S CORRECTION 0F 11 0F 0E
F 0DAH VPS V SHIFT 02 03 02 03
S 0DBH VCP V COMPENSATION 04
F 0DCH WID WIDTH 20 16 20 16
F 0DDH DPC E-W PARABOLA 20 20
S 0DEH CNR E-WCONER 0A 0A
F 0DFH KEY TRAPEZIUM 0A 09 0A 09
S 0EGH HCP H COMPENSATION 03 03
S 0El H VMC V-∫ CORRECTION 00 0F 00 0F
S 0E2H SHI (WIDE) SUB HEIGHT E3 DA E3 DB
S 0E3H SLI (WIDE) SUB V LINEARITY 00 01 00 02
S 0E4H SVS (WIDE) SUB V-S CORRECTION FA FA
S 0E5H SDP (WIDE) SUB E-W PARABOLA F0 F0
S 0E6H SCN (WIDE) SUB E-W CONER FD FD
S 0E7H BASC SUB BASS CENTER 08 08
S 0E8H TREC SUB TREBLE CENTER 07 07
S 0E9H WON2 17 17
S 0EAH UBCP USER BASS DATA AT RESET OF EEPROM 00 00
S 0EBH EMX NICAM ERROR MAX FC FC
S 0ECH EMN NICAM ERROR MIN 64 64
S 0EDH FMA NICAM FM ATT 00 00
S 0EEH STS IGR STEREO SEPARATION 00 00
S 0EFH TEXT HN POSITION OF TEXT 00 00
FF
04
Symbol Description
KEY Pedestal distortion correction.
HCP Setting of amount of H ampli
tude correction against variation
of screen brightness.
VMC V linearity correction. Linearity
balance at 1/4, 3/4 areas from
top.
Electrical Adjustments
Adjustment Parts or Input Point’ Adjustment signal Adjustment conditions and procedures
Bus control item Output point
Horizontal amplitude Visual check of picture UK Philips pattern 1. Conditions: After V. HEIGHT, VERT POSITION
adjustment (WID) (Bus control) and H. CENT have been adjusted, set
Pin distortion Do not use the Philips the controllers as follows:
compensation amount pattern of FRANCE Contrast: Max
adjustment (DPC) SECAM. Brightness: Center
Keystone distortIon Color: Center
compensation amount 2. Adjustment procedure
adjustment (KEY) a. Adjust the horizontal amplitude by the sub
address WID.
Adjust so that the left and right white flags of
Philips pattern disappear at the very limits.
b. Make the left and right vertical bars straight by
the sub address DPC.
c. Compensate the key distortion by the sub
address KEY.
d.Again, adjust the sub address WID.
WG Philips pattern 1. Conditions: Contrast: Max
HEIGHT (HIT) Visual check of picture Brightness: Center
VERT. POSITION (Bus control) Do not use the Philips Color: Center
pattern of FRANCE 2. Adjustment procedure
SECAM. a. By the bus address VPS, adjust V. position so
that the circle of Philips pattern comes to the
vertical center.
b. Adjust HIT so that the upper and lower flags of
Philips pattern disappear at the very limits.
Circuit Block Diagram
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.
4. NORMAL OPERATION ON THE SERVICE
MODE
Press MENU button on TV.
Adjustment mode Normal operation mode
MODE Symbol S
D3H Data
Press
Press
5. EXIT FROM SERVICE MODE
Press POWER button on the remote control to
turn off the TV once.
SELECTING THE ADJUSTING ITEMS
(See Table)
1) Every pressing of CHANNEL ▲ button
changes the adjustment items in the following
order. (▼ button for reverse order.)
S ... semi-fixed data area which is fixed by
model. (Do not adjust in field service.)
F ... This item may require adjustments by
models after initialization, when QAO2 is
replaced.
ADJUSTING THE DATA
1) Pressing of VOLUME ▲ or ▼ button will
change the value of data in the range from
OOH to FFH. The variable range depends on
the adjusting item.
EXIT FROM SERVICE MODE
1) Press POWER button to turn off the TV once.
SUB DATA ADDITIONAL DESCRIPTION
Symbol Description
HIT V amplitude adjustment.
LIN V linearity correction 1.
Linearity balance between top and bottom
screen.
VSC V linearity correction 2.
Linearity balance between top/bottom and
center.
Symbol Description
VPS V picture position adjustment.
VCP Setting of amount of V amplitude
correction against variation of
screen brightness.
WID H amplitude adjustment.
DPC H pin-cushion distortion
correction.
CNR H pin-cushion distortion
correction at four corners.
Safety Notice / Service Adjustments / Electrical Adjustment / Electrical Adjustments / Service Mode Cont’d / Circuit Block Diagram
Main Diagram 1 ...Cont’d (1) ....Cont’d (2) / Main Diagram 2 ...Cont’d / Main Diagram 3 ...Cont’d (1) ....Cont’d (2) / Main Diagram 4 ...Cont’d
TOSHIBA 2563 DB
Main Diagram 1
3
Safety Notice / Service Adjustments / Electrical Adjustment / Electrical Adjustments / Service Mode Cont’d / Circuit Block Diagram
Main Diagram 1 ...Cont’d (1) ....Cont’d (2) / Main Diagram 2 ...Cont’d / Main Diagram 3 ...Cont’d (1) ....Cont’d (2) / Main Diagram 4 ...Cont’d
Main Diagram 1
Cont’d
4TOSHIBA 2563 DB
Safety Notice / Service Adjustments / Electrical Adjustment / Electrical Adjustments / Service Mode Cont’d / Circuit Block Diagram
Main Diagram 1 ...Cont’d (1) ....Cont’d (2) / Main Diagram 2 ...Cont’d / Main Diagram 3 ...Cont’d (1) ....Cont’d (2) / Main Diagram 4 ...Cont’d
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