SERVICE MANUAL
COLOR TELEVISION
FILE NO. 050-20117
20AS21
6. AVOID AN X-RAY
1. KEEP THE NOTICES
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
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.
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.
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
HOW TO ORDER PARTS
SERVICING NOTICES ON CHECKING
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.
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is
flowing.
3. USE THE DESIGNATED PARTS
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.
PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
4.
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.
7. PERFORM A SAFETY CHECK AFTER
SERVICING
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
GENERAL SPECIFICATIONS
G-1
TV
CRT
CRT Size / Visual Size
19 inch / 480.0mmV
System
CRT Type
Normal
Deflection
90
degree
Magnetic Field
BV/BH
+0.35G/0.30G
Color System
NTSC
Speaker
1Speaker
Position
Bottom
Size
3 Inch
Impedance
8
ohm
Sound Output
MAX
1.5 W
10%(Typical)
1.0 W
NTSC3.58+4.43 /PAL60Hz
No
G-2
Tuning
Broadcasting System
US
System M
System
Tuner and
System
1Tuner
Receive CH
Destination
Ohers
Tuning System
F-Synth
Input Impedance
VHF/UHF 75 ohm
2 - 69, 4A, A-5 - A-1,
CH Coverage
A - I, J - W, W+1 - W+84
Intermediate
Picture(FP)
45.75MHz
Frequency
Sound(FS)
41.25MHz
FP-FS
4.50MHz
Preset CH
No
Stereo/Dual TV Sound
No
Tuner Sound Muting
Yes
G-3
Power
Power Source
AC
120V AC 60Hz
DC
Power Consumption
at AC
73 W at AC 120 V 60 Hz
Stand by (at AC)
5
W at AC 120 V 60 Hz
Per Year
--
kWh/Year
Protector
Power Fuse
Yes
G-4
Regulation
Safety
UL
Radiation
FCC
X-Radiation
DHHS
G-5
Temperature
Operation
+5oC ~ +40oC
Storage
-20oC ~ +60oC
G-6
Operating Humidity
Less then 80% RH
G-7
On Screen
Menu
Yes
Display
Menu Type
Character
Picture
Yes
Contrast
Yes
Brightness
Yes
Color
Yes
Tint
Yes
Sharpness
Yes
Audio
No
Bass
No
Treble
No
Balance
No
BBE On/Off
No
Stable Sound On/Off
No
CH Set Up
Yes
TV/CABLE(CATV)
Yes
Auto CH Memory
Yes
Add/ Delete
Yes
Language
Yes
V-chip
Yes
CH Label
No
Favorite CH
No
Color Stream DVD/DTV
No
Control Level
Yes
Volume
Yes
Brightness
Yes
Contrast
Yes
Color
Yes
Tint (NTSC Only)
Yes
Sharpness
Yes
Tuning
No
Bass
No
Treble
No
Balance
No
Back Light
No
Stereo,Audio Output,SAP
No
Video
Yes
Color Stream
No
Channel(TV/Cable)
Yes
CH Label
No
Sleep Timer
Yes
Sound Mute
Yes
V-chip Rating
Yes
GENERAL SPECIFICATIONS
G-8
OSD Language
English
French
Spanish
OSD Language Setting
English
G-9
Clock and
Sleep Timer
Max Time
120 Min
Timer
Step
10
Min
On/Off Timer
Program(On Tim / Off Tim)
No
Wake Up Timer
No
Timer Back-up (at Power Off Mode)
more than
--
Min
Sec
G-10
Remote
Unit
RC-EH
Control
Glow in Dark Remocon
No
Format
Toshiba
Custom Code
40-BF h
Power Source
Voltage(D.C)
3V
UM size x pcs
UM-4 x 2 pcs
Total Keys
27
Keys
Keys
Power
Yes
1
Yes
2
Yes
3
Yes
4
Yes
5
Yes
6
Yes
7
Yes
8
Yes
9
Yes
0
Yes
100
No
CH Up
Yes
CH Down
Yes
Volume Up
Yes
Volume Down
Yes
TV/Caption/Text
Yes
CH1/CH2
Yes
TV/Video(TV/AV)
Yes
CH RTN/CH ENT(Quick View)
Yes
Sleep
Yes
RE Call(Call)
Yes
Reset
Yes
Menu
Yes
Enter
Yes
Mute
Yes
Exit
No
MTS(Audio Select)
No
Set +
Yes
Set -
Yes
Multi Brand Keys
CH Up(VCR)
No
CH Down(VCR)
No
Pause/Still
No
TV/VCR(VCR)
No
Code
No
FF
No
Rew
No
Rec
No
Play
No
Stop
No
TV
No
VCR
No
Cable
No
GENERAL SPECIFICATIONS
G-11
Features
Auto Degauss
Yes
Auto Shut Off
Yes
Canal+
No
CATV
Yes
Anti-theft
No
Rental
No
Memory(Last CH)
Yes
Memory(Last Volume)
Yes
V-Chip
Yes
Type
USA,ORION Type
BBE
No
Auto Search
No
CH Allocation
No
SAP
No
Channel Lock
No
Just Clock Function
No
Game Position
No
CH Label
No
VM Circuit
No
Full OSD
No
Premiere
No
Comb Filter
No
Lines
Auto CH Memory
Yes
Hotel Lock
No
Closed Caption
Yes
Stable Sound
No
FBT Leak Test Protect
Yes
Favorite CH
No
G-12
Accessories
Owner's Manual
Language
English / Spanish
W/ Warranty
Yes
Remote Control Unit
Yes
Rod Antenna
No
Poles
Terminal
Loop Antenna
No
Terminal
U/V Mixer
No
DC Car Cord (Center+)
No
Guarantee Card
No
Warning Sheet
No
Circuit Diagram
No
Antenna Change Plug
No
Service Facility List
No
Important Safety Instruction
Yes
Dew/AHC Caution Sheet
No
AC Plug Adapter
No
Quick Set-up Sheet
No
Battery
Yes
UM size x pcs
UM4 x 2
OEM Brand
No
AC Cord
No
AV Cord (2Pin-1Pin)
No
Registration Card (NDL Card)
No
ESP Card
No
PTB Sheet
No
300 ohm to 75 ohm Antenna Adapter
No