SERVICE MANUAL
PRINTED IN UK.
2002
C
COLOURTELEVISION
21N21F
TOSHIBA
SERVICING NOTICES ON CHECKING
6. AVOID AN X-RAY
1. KEEP THE NOTICES
As for the places which need special attentions,
they are indicated with the labels or seals on the
cabinet, chassis and parts. Make sure to keep the
indications and notices in the operation manual.
3. USE THE DESIGNATED PARTS
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
Safety is secured against an X-ray by consider-
ing about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage pe-
ripheral circuit, use the designated parts and
make sure not modify the circuit.
Repairing except indicates causes rising of high
voltage, and it emits an X-ray from the cathode-
ray tube.
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be
found at the end of the SERIAL NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
HOW TO ORDER PARTS
Inferior silicon grease can damage IC's and transistors.
When replacing an IC's or transistors, use only specified silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
IMPORTANT
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is
flowing.
The parts in this equipment have the specific
characters of incombustibility and withstand
voltage for safety. Therefore, the part which is
replaced should be used the part which has
the same character.
Especially as to the important parts for safety
which is indicated in the circuit diagram or the
table of parts as a
mark, the designated
parts must be used.
4. PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
There are parts which use the insulation
material such as a tube or tape for safety, or
which are assembled in the condition that
these do not contact with the printed board.
The inside wiring is designed not to get closer
to the pyrogenic parts and high voltage parts.
Therefore, put these parts in the original
positions.
In the condition that an explosion-proof cathode-
ray tube is set in this equipment, safety is
secured against implosion. However, when
removing it or serving from backward, it is
dangerous to give a shock. Take enough care to
deal with it.
PERFORM A SAFETY CHECK AFTER
SERVICING
7.
Confirm that the screws, parts and wiring which
were removed in order to service are put in the
original positions, or whether there are the
portions which are deteriorated around the
serviced places serviced or not. Check the
insulation between the antenna terminal or
external metal and the AC cord plug blades.
And be sure the safety of that.
(INSULATION CHECK PROCEDURE)
1.
2.
3.
4.
Unplug the plug from the AC outlet.
Remove the antenna terminal on TV and turn
on the TV.
Insulation resistance between the cord plug
terminals and the eternal exposure metal
[Note 2] should be more than 1M ohm by
using the 500V insulation resistance meter
[Note 1].
If the insulation resistance is less than 1M
ohm, the inspection repair should be
required.
[Note 1]
If you have not the 500V insulation
resistance meter, use a Tester.
[Note 2]
External exposure metal: Antenna terminal
Earphone jack
A1-1
CONTENTS
A2-1
SERVICING NOTICES ON CHECKING ......................................................................................................
HOW TO ORDER PARTS ...........................................................................................................................
IMPORTANT ................................................................................................................................................
CONTENTS .................................................................................................................................................
GENERAL SPECIFICATIONS ....................................................................................................................
DISASSEMBLY INSTRUCTIONS
1.REMOVAL OF ANODE CAP ..............................................................................................................
2.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ...............................................................
SERVICE MODE LIST .................................................................................................................................
CONFIRMATION OF HOURS USED ..........................................................................................................
WHEN REPLACING EEPROM( MEMORY) IC ...........................................................................................
ELECTRICAL ADJUSTMENTS ..................................................................................................................
BLOCK DIAGRAM ......................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT ...............................................................................................................................................
SCHEMATIC DIAGRAMS
MICON/TUNER .......................................................................................................................................
IF/CHROMA ............................................................................................................................................
21PIN/AV SW .........................................................................................................................................
DEFLECTION/CRT .................................................................................................................................
POWER ..................................................................................................................................................
SOUND AMP ..........................................................................................................................................
WAVEFORMS .............................................................................................................................................
MECHANICAL EXPLODED VIEW ..............................................................................................................
MECHANICAL REPLACEMENT PARTS LIST ..........................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ............................................................................................
A1-1
A1-1
A1-1
A2-1
A3-1~A3-5
B1-1
B2-1, B2-2
C-1
C-1
C-2
D-1~D-5
E-1, E-2
F-1~F-4
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
G-9, G-10
G-11, G-12
H-1~ H-3
I-1
J1-1
J2-1~ J2-4
GENERAL SPECIFICATIONS
G-1
TV
CRT
CRT Size / Visual Size
21 inch / 544.5mmV
System
CRT Type
NORMAL
Deflection
90
degree
Magnetic Field
BV/BH
+0.45G/0.18G
Color System
PAL/SECAM
Speaker
1 Speaker
Position
Front
Size
1.5 x2.5 Inch
Impedance
4
ohm
Sound Output
MAX
5.0 W
10%(Typical)
4.0 W
DDR SECAM
Yes
NTSC3.58(AV)+NTSC4.43
Yes
PAL60Hz
Yes
G-2
Tuning
Broadcasting System
CCIR, FRENCH System BG, DK, L
System
Tuner and
System
1Tuner
Receive CH
Destination
CCIR Hyper+France CATV
Tuning System
F-Synth
Input Impedance
VHF/UHF 75 ohm
CH Coverage
E2~E4, X~Z+2, S1~S10,
E5~E12,S11~S41,E21~E69
Intermediate
PAL/SECAM(U&VH)/SECAM(VL)
Frequency
Picture(FP)
38.9/38.9/34.4MHz
Sound(FS)
33.4/32.4/40.9MHz
FP-FS
5.5/6.5/6.5MHZ
PAL DK,SECAM DK
Picture(FP)
38.9 , 38.9 MHz
Sound(FS)
32.4 , 32.4 MHz
FP-FS
6.5 , 6.5MHz
Auto Tuning Method
ALL Band (Not C.C.I.R. CH Plan)
Preset CH
100
Stereo/Dual TV Sound
No
Tuner Sound Muting
Yes
G-3
Power
Power Source
AC
230V AC 50Hz
DC
Power Consumption
at AC
60 W at AC 230 V 50 Hz
Stand by (at AC)
3
W at AC 230 V 50 Hz
Per Year
--
kWh/Year
Protector
Power Fuse
Yes
G-4
Regulation
Safety
CE(EN60065:98)
Radiation
CE
X-Radiation
-
G-5
Temperature
Operation
+5oC ~ +40oC
Storage
-20oC ~ +60oC
G-6
Operating Humidity
Less than 80% RH
A3-1
GENERAL SPECIFICATIONS
G-7
On Screen
Menu
Yes
Display
Menu Type
Character
Picture
Yes
Contrast
Yes
Brightness
Yes
Color
Yes
Tint (NTSC Only)
Yes
Sharpness
Yes
Audio
No
Bass
No
Treble
No
Balance
No
BBE On/Off
No
Stable Sound On/Off
No
CH Tuning
Yes
Manual
Yes
Auto
Yes
CH Allocation
Yes
Language
Yes
Clock Set
No
On Timer Set
Yes
Off Timer Set
Yes
Pin Code Registration
No
Panel Lock
Yes
Nicam Auto Off
No
AV Color System
Yes
Sound System
No
Auto 4:3 Default
No
AV2 Output
No
Output Source
No
Source
No
Control Level
Yes
Volume
Yes
Brightness
Yes
Contrast
Yes
Color
Yes
Tint (NTSC Only)
Yes
Sharpness
Yes
Tuning
Yes
Bass
No
Treble
No
Balance
No
Back Light
No
Nicam ST
No
Tone 1/2 (A/B)
No
Surround On/Off
No
Pin Code
No
AV
Yes
Skip
Yes
Channel
Yes
Hotel Lock
No
Sleep Timer
No
Selectable Picture
Yes
Wide Mode
No
Sound Mute
Yes
G-8
OSD Language
English
French
Spanish
Germany
Italian
Polski
Sweden
Netherlands Portugal
Denmark Russian
Czech Slovak Hungarian
A3-2