Toshiba 14C2E1 Schematic
SERVICE MANUAL
Color Television
Color Television
14C3E1
FILE NO. 060-200568GR
S5ER series
14C3ES1
14C3T1
14C2E1
The above models are classified as green products (*1), as indicated by the underlined serial numbers.
This Service Manual describes replacement parts for green products. When repairing these green product(s), use
the part(s) described in this manual and lead-free solder (*2).
For (*1) and (*2), see the next page.
Published in Singapore, December 2005 GREEN© TOSHIBA SINGAPORE PTE LTD
TABLE OF CONTENTS
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS ............................................................................................................................................. 3
SET-UP ADJUSTMENT ................................................................................................................................................. 4
SERVICE MODE ........................................................................................................................................................... 6
DESIGN MODE ............................................................................................................................................................. 9
ELECTRICAL ADJUSTMENTS ................................................................................................................................... 10
CIRCUIT CHECK ......................................................................................................................................................... 12
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA ................................................................................................................................... 13
NAMES AND FUNCTIONS OF CONTROLS .............................................................................................................. 14
PROGRAMMING CHANNEL MEMORY...................................................................................................................... 15
PROCEDURES TO SET HOTEL MODE ..................................................................................................................... 17
CHASSIS AND CABINET REPLACEMENT PARTS LIST ........................................................................................... 18
PC BOARDS BOTTOM VIEW...................................................................................................................................... 24
TERMINAL VIEW OF TRANSISTORS ........................................................................................................................ 26
CIRCUIT BLOCK DIAGRAM ....................................................................................................................................... 29
SPECIFICATIONS .................................................................................................................................................... END
APPENDIX:
CIRCUIT DIAGRAM
(*1)
The EC is actively promoting the WEEE & RoHS Directives that define standards for recycling and reuse of Waste
Electrical and Electronic Equipment and for the Restriction of the use of certain Hazardous Substances. From July 1,
2006, the RoHS Directive will prohibit any marketing of new products containing the restricted substances.
Increasing attention is given to issues related to the global environmental. Toshiba Corporation recognizes
environmental protection as a key management tasks, and is doing its utmost to enhance and improve the quality and
scope of its environmental activities. In line with this, Toshiba proactively promotes Green Procurement, and seeks to
purchase and use products, parts and materials that have low environmental impacts.
Green procurement of parts is not only confined to manufacture. The same green parts used in manufacture must also
be used as replacement parts.
(*2)
This product is manufactured using lead-free solder as a part of a movement within the consumer products industry at
large to be environmentally responsible. Lead-free solder must be used in the servicing and repair of this product.
GREEN PRODUCT PROCUREMENT
LEAD-FREE SOLDER
WARNING
This product is manufactured using lead free solder.
DO NOT USE LEAD BASED SOLDER TO REPAIR THIS PRODUCT!
The melting temperature of lead-free solder is higher than that of leaded solder by 86°F to 104°F (30°C to 40°C). Use of
a soldering iron designed for lead-based solders to repair product made with lead-free solder may result in damage to
the component and or PCB being soldered. Great care should be made to ensure high-quality soldering when servicing
this product -especially when soldering large components, through-hole pins, and on PCBs - as the level of heat
required to melt lead-free solder is high.
– 2 –
CHAPTER 1 GENERAL ADJUSTMENTS
SAFETY INSTRUCTIONS
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-
TION” AND “PRODUCT SAFETY NOTICE” INSTRUCTIONS BELOW.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous
X-RAY RADIATION. To avoid such hazards, the high
voltage must not be above the specified limit. The nominal
value of the high voltage of this receiver is (A) kV at zero
beam current (minimum brightness) under a (C) V AC
power source. The high voltage must not, under any
circumstances, exceed (B) kV.
Refer to table-1 for high voltage (A), (B) & AC voltage (C).
(See SETTING & ADJUSTING DATA on page 13)
Each time a receiver requires servicing, the high voltage
should be checked following the HIGH VOLTAGE CHECK
procedure in this manual. It is recommended that the
reading of the high voltage be recorded as a part of the
service record. It is important to use an accurate and
reliable high voltage meter.
SAFETY PRECAUTION
WARNING : Service should not be attempted by anyone unfamiliar with the necessary precautions on this receiver. The following
are the necessary precautions to be observed before servicing this chassis.
1. An isolation transformer should be connected in the power line between the receiver and the AC line before any service is
performed on the receiver.
2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube
is highly evacuated and if broken, glass fragments will be violently expelled. Use shatter proof goggles and keep picture
tube away from the unprotected body while handling.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in place, such as;
nonmetallic control knobs, insulating covers, shields, isolation resistor-capacitor network etc.
2. The only source of X-RAY RADIATION in this TV receiver
is the picture tube. For continued X-RAY RADIATION
protection, the replacement tube must be exactly the same
type tube as specified in the parts list.
3. Some part in this receiver have special safety-related
characteristics for X-RAY RADIATION protection. For
continued safety, parts replacement should be undertaken
only after referring to the PRODUCT SAFETY NOTICE
below.
GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These characteristics are
often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using
replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are identified by the
international hazard symbols on the schematic diagram and the parts list.
Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement
parts which do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray radiation
or other hazards.
– 3 –
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION”, “SAFETY PRECAU-
TION” AND “PRODUCT SAFETY NOTICE” ON PAGE 3 OF THIS MANUAL.
R 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.
GENERAL ADJUSTMENTS
There are no adjustment of purity and convergence in some picture tube (Unified with purity magnet)
*
COLOR PURITY ADJUSTMENT
NOTE : Before attempting any purity adjustments, the
1. Demagnetize the picture tube and cabinet using a degauss-
2. Set the brightness and contrast to maximum.
3. Use a green raster from among the built-in test signals.
4. Loosen the clamp screw holding the yoke and slide the
SPECIFIC INFORMATIONS
Mounting position of the purity magnet assembly should fit to same position as old one because slightly difference to
the position depend on a kind of tube.
receiver should be operated for at least fifteen minutes.
ing coil.
yoke backward or forward to provide vertical green belt
(zone) in the picture screen.
SET-UP ADJUSTMENT
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 temporarily.
8. Check the purity of the red and blue raster.
GLASS CLOTH
TAPES
DEFLECTION
YOKE
29.1mm(28", 29")
25mm(25")
19mm(19", 20", 21")
14mm(13", 14")
PURITY/
CONVERGENCE
MAGNET ASS'Y
Figure 1.
TEMPORARY
MOUNTING
RUBBER WEDGE
ADHESIVE
DEFLECTION
YOKE
– 4 –
CONVERGENCE ADJUSTMENTS
NOTE: Before attempting any convergence adjustments, the
receiver should be operated for at least fifteen
minutes.
R CENTER 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 center 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 superimpose 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.
4-POLE
MAGNETS
6-POLE
MAGNETS
R 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.
ADJUST THE ANGLE
(VERTICAL LINES)
FIXED
GENERAL ADJUSTMENTS
ROTATE TWO TABS
AT THE SAME TIME
(HORIZONTAL LINES)
PURITY
MAGNETS
CONVERGENCE MAGNET ASSEMBLY ADJUSTMENT OF MAGNETS
Figure 2.
BLU RED
BLU
RED
4-POLE MAGNETS MOVEMENT
BGR
R
G
B
RGB
RED/BLU
GRN
Center Convergence by Convergence Magnets
B
G
R
RED/BLU GRN
6-POLE MAGNETS MOVEMENT
B
G
R
BGR
RGB
R
G
B
SPECIFIC INFORMATIONS
INCLINE THE YOKE UP (OR DOWN)
Circumference Convergence by DEF Yoke
Figure 3. Dot Movement Pattern
INCLINE THE YOKE RIGHT (OR LEFT)
– 5 –
1. ENTERING TO SERVICE MODE
1) Press o button once on
Remote Control.
SERVICE MODE
2) Press o button again to
keep pressing.
3) While pressing the o button,
press MENU button on TV set.
GENERAL ADJUSTMENTS
2. DISPLAYING THE ADJUSTMENT MENU
1) Press MENU button on TV.
Service mode
S
3. KEY FUNCTION IN THE SERVICE MODE
The following key entry during display of adjustment menu provides special functions.
A single horizontal line ON/OFF: - / - - button (on Remote) or a button (on TV)
Test signal selection : a button (on Remote)
Selection of the adjustment items : Channel s/t (on TV or Remote)
Change of the data value : Volume ; +/– (on TV or Remote)
Adjustment menu mode ON/OFF : MENU button (on TV)
Initialization of the memory (QA02) : CALL + Channel button on TV (s)
Reset the count of operating protect
circuit to “00”: CALL + Channel button on TV (t)
“RCUT” selection : 1 button
“GCUT”selection : 2 button
“BCUT” selection : 3 button
“CNTX” (or “SCNT”) selection : 4 button
“COLC” selection : 5 button
“TNTC” selection : 6 button
“SBY” selection : 7 button
“SRY” selection : 8 button
Self diagnostic display ON/OFF : 9 button
Press
Press
Adjustment mode
Item
Data
(Service mode display)
Item
Data
S
Color thickness correction
note: Displayed differently as shown below, depending
on the setting of the receiving color system.
COLP (PAL)
COLC (NTSC)
COLS (SECAM)
CAUTION : Never try to perform initialization unless you have changed the memory IC.
– 6 –
4. SELECTING THE ADJUSTING ITEMS
1) Every pressing of CHANNEL s button in the service mode changes the adjustment items in the order of table-2.
(t button for reverse order)
Refer to table-2 for preset data of adjustment mode.
(See SETTING & ADJUSTING DATA on page 13)
5. ADJUSTING THE DATA
1) Pressing of VOLUME ; +/– button will change the value of data in the range from 00H to FFH. The variable range
depends on the adjusting item.
6. EXIT FROM SERVICE MODE
1) Pressing POWER button to turn off the TV once.
R INITIALIZATION OF MEMORY DATA OF QA02
After replacing QA02, the following initialization is required.
1. Enter the service mode, then select any register item.
2. Press and hold the CALL button on the Remote, then press the CHANNEL s button on the TV. The initialization of QA02
has been complated.
3. Check the picture carefully. If necessary, adjust any adjustment item above.
Perform “Auto search Memory” on the owner’s manual.
CAUTION: Never attempt to initialize the data unless QA02 has been replaced.
7. TEST SIGNAL SELECTION
1) Every pressing of a button on the Remote Control changes the built-in test patterns on screen as described below in
SERVICE MODE.
GENERAL ADJUSTMENTS
Signal off
NTSC signals (14 patterns)
PAL signals (14 patterns)
Signals Picture
• Red raster
• Green raster
• Blue raster
• All Black
• All White
• Black & White
• Black cross-bar
• White cross-bar
• Black cross-bar
on green raster
• Black cross-hatch
• White cross-hatch
• Black cross-dot
• White cross-dot
• H signal (white)
• H signal (black)
* The signals marked with are not usable to display in the Test signal for some model.
– 7 –
8. SELF DIAGNOSTIC FUNCTION
1) Press “9” button on Remote Control during display of adjustment menu in the service mode.
The diagnosis will begin to check if interface among IC’s are executed properly.
2) During diagnosis, the following displays are shown.
<SELF CHECK>
23 * * * * * *
1
POWER : 000
2
SYNC : OK
3
GENERAL ADJUSTMENTS
<SELF CHECK>
press “9” button
V/C/D R0:01111001
R1:10110000
R2:01000000
R3:10010001
1 Part number of microprocessor (Q100)
2 Operation number of protecting circuit ----“00” is normal.
3 RF signal center frequency is locked.
Read Data
D5 D4 D3 D2 D1 D0
R CUTOFF DATA
R0
R1
R2
R3
D7
POR
V LOCK
V FREQ
D6
IF LOCK AFT WINDOW AFT CENTER H LOCK
HOUT VOUT RGB OUT
STDM G CUTOFF DATA B CUTOFF DATA
NOISE DETCIN DC IF LEVEL ADJ TIME SYNC DET
G DRIVE DATA
PIF VCO error
COLOR SYSTEM
B DRIVE DATA
det
– 8 –
1. ENTERING TO DESIGN MODE
1) Select the Service mode.
(See page 6)
DESIGN MODE
2) While pressing o(or CALL) button on the
remote controller and press MENU button
on TV.
3) Press MENU button on TV.
S D
(Design mode) (Adjustment mode)
When QA02 is initialized, items “OPT” and “OPT1” of DESIGN MODE are set to the data of the representative model of this
chassis family.
Therefore, because ON-SCREEN specification remains in the state of the representative of model. This model is required to
reset the data of items “OPT” and “OPT1”.
2. SELECTING THE ADJUSTING ITEMS
Every pressing of CH t button in the design mode changes the adjustment items.
(s button for reverse order)
3. ADJUSTING THE DATA
Pressing of ; -/+ button will change the value of data.
Press
Press
ITEM
DATA
GENERAL ADJUSTMENTS
– 9 –
ELECTRICAL ADJUSTMENTS
ITEM
FOCUS VR ADJ
SUB-BRIGHTNESS
(BRTC)
GENERAL ADJUSTMENTS
Note: Constrict the picture height
until the vertical retrace line
appears adjusting the item
HIT (HEIGHT).
HORIZONTAL POSITION
ADJUSTMENT (HPOS)
VERTICAL POSITION
ADJUSTMENT (VPOS)
ADJUSTMENT PROCEDURE
1. Enter the service mode, then select any register item.
2. Press the a button on the remote controller until the black cross-bar pattern appears
on the screen.
3. Adjust the FOCUS control (on T461) for well defined scanning lines on the picture
screen.
1. Set CONTRAST to minimum, and
BRIGHTNESS to center by adjusting user
controls.
2. Set the TV in service mode to get white
cross-bar of inside pattern.
3. Select BRTC (brightness correction), and
press ; –/+ buttons to reduce the value so
that white portion of inside pattern slightly
light.
4. Press ; –/+ buttons to increase the data
value of BRTC, and set it just before the
difference between the belt of vertical retrace
and the border of black portion of inside
pattern is visible.
After that, return vertical height and contrast.
1. Set the TV in service mode, and get
black or white cross-bar signal with a
button on the remote controller.
2. Select either HPOS (Horizontal picture
phase) or VPOS (Vertical picture
phase) with CH s/t buttons, and
adjust horizontal or vertical picture
position in the center of screen with
; –/+ buttons.
Belt of vertical retrace
VERTICAL AMPLITUDE
ADJUSTMENT (HIT)
1. Set the TV in service mode, and get
black or white cross-hatch signal with
a button on the remote controller.
2. Select HIT (Vertical amplitude) with
CH s/t buttons, and adjust vertical
amplitude with ; –/+ buttons so that
vertical amplitude lacks a little.
3. Adjust vertical amplitude with ; –/+
buttons so that the first bar on crosshatch signal touches edge of screen.
The first
– 10 –
ITEM
ADJUSTMENT PROCEDURE
WHITE BALANCE
ADJUSTMENT
• CUTOFF ADJUSTMENT
(RCUT)
(GCUT)
(BCUT)
• DRIVE ADJUSTMENT
(GDRV)
(BDRV)
NOTE: It is released built-in test pattern by changing the adjustment item for some model.
In this case, select the adjustment item with CH s/t button first and then select the built-in test pattern with
button.
1. Set Contrast to 40, and brightness to +20 by picture control.
2. Set the TV in service mode, and get the inside W/B adjusting signal with a button.
3. Select RCUT, GCUT and BCUT with CH s/t buttons, to set individual values to
Initial reference data, and to set GDRV and BDRV to Initial reference data with
; – /+ buttons.
4. Press
horizontal line on screen.
Note: Every pressing of
picture alternately.
5. Press
which did not light in the above step with CH s/t buttons. Then tap ; – /+ buttons
so that three colors slightly light in the same level.
X To correct white balance in light area,
select GDRV and BDRV with CH s/t
buttons to adjust.
X To correct white balance in dark area,
perform fine adjustment of RCUT, GCUT
and BCUT.
button on the remote control and rotate Screen VR to get one slight
button provides Horizontal line picture and Normal
button to release horizontal line picture, and select the two other colors
GENERAL ADJUSTMENTS
Light area check
(to show white)
Dark area check
(to show black)
– 11 –
HIGH VOLTAGE CHECK
CAUTION: There is no HIGH VOLTAGE ADJUSTMENT on this chassis. Checking should be done following the steps below.
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 must be measured below (B) kV.
Refer to table-1 for high voltage (B).
(See SETTING & ADJUSTING DATA on page 13)
4. Vary the BRIGHTNESS control to both extremes to be sure the high voltage does not exceed the limit under any conditions.
GENERAL ADJUSTMENTS
CIRCUIT CHECK
– 12 –
CHAPTER 2 SPECIFIC INFORMATIONS
SETTING & ADJUSTING DATA
SAFETY INSTRUCTIONS
HIGH VOLTAGE AT ZERO BEAM: (A) 24.5 kV
MAX HIGH VOLTAGE: (B) 25.0 kV
AC VOLTAGE (C) 110-240 V
Table-1
SERVICE MODE
ADJUSTING ITEMS AND DATAS IN THE SERVICE MODE:
14"
Item
RCUT R CUTOFF (B/W) 20H ←
GCUT G CUTOFF (B/W) 20H ←
BCUT B CUTOFF (B/W) 20H ←
GDRV G DRIVE 40H ←
BDRV B DRIVE 40H ←
BRTC SUB BRIGHT CEN 40H ←
COLC SUB COLOR CEN NTSC 30H ←
TNTC SUB TINT CEN 45H ←
COLP SUB COLOR CEN PAL 09H ←
COLS SUB COLOR CEN SECAM 30H ←
SCNT SUB CONTRAST 08H ←
HPOS 50Hz H-POSITION 0DH 13H
VPOS V-POSITION 04H ←
HIT HEIGHT 1EH 24H
VLIN V-LINEARITY 0AH ←
SBY SECAM R-Y 08H ←
SRY SECAM-B-Y 08H ←
RAGC RF AGC 2AH ←
Adjustment Reference data
Table-2
Data
SPECIFIC INFORMATIONS
– 13 –
NAMES AND FUNCTIONS OF CONTROLS
TV Front and Remote control
1
2
3
SPECIFIC INFORMATIONS
For 14C3E1, 14C3ES1, 14C3T1, 14C2E1 models
(2)
L/MONO R
j
a q Main power on/off
b q Power indicator (red)
c Remote sensor
d MENU Turn on menu display
e a Input source selection, press repeatedly to
f –; + Volume down/up
g tcs Channel down/up
h l / Headphones jack (3.5mm)/
L Stereo headphones jack (3.5mm)
i AUDIO Audio input terminals*
j VIDEO Video input terminal
*
e
i
select A1, A2 or channel position
number cyclically
Menu selection or item adjust
Menu item selection
For private listening. The sound from the
speakers will be cut off automatically.
h
d
TV
f
g
c
b
8
9
!
"
a
* The AUDIO R jack is not available
for 14C2E1.
Remote Control
1 f Power on/standby
2 o Sound Mute, press again or ; –/+ to
restore the sound.
3 0~9 Number buttons
4 a Input source selection, press repeatedly
to select A1, A2 or channel position
number cyclically
5 MENU Turn on menu display
6 CH s/t Channel up/down
Menu item selection
7 CALL On-screen on/off
Turn off the menu
8 -/-- Digit selection
9 ; –/+ Volume down/up
Menu selection or item adjust
! h Picture menu
8 Sound menu
4
5
6
7
Note: The shaded buttons are not available for your TV. If you press the button, “MODE NOT AVAILABLE” will appear on the
screen.
– 14 –
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