SERVICE MANUAL
COLOR TELEVISION
DOCUMENT CREATED IN JAPAN, September, 2005
19A25C
FILE NO. 050-200524GR
(MFR'S VERSION A)
The above model is classified as a green product (*1), as indicated by the underlined serial number.
This Service Manual describes replacement parts for the green product. When repairing this green
product, use the part(s) described in this manual and lead-free solder (*2).
For (*1) and (*2), see the next page.
A1-1
(*1)
GREEN PRODUCT PROCUREMENT
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 lead.
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)
LEAD-FREE SOLDER
This product is manufactured using lead-free solder as a part of a movement within the CE
industry at large to be environmentally responsible. Lead-free solder must be used in the servicing
and repair of this product.
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.
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
A1-2
CONTENTS
A2-1
GREEN PRODUCT PROCUREMENT ........................................................................................................
LEAD-FREE SOLDER ................................................................................................................................
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/CHROMA/TUNER ......................................................................................................................
TV POWER .............................................................................................................................................
DEFLECTION/CRT .................................................................................................................................
SOUND/AV .............................................................................................................................................
WAVEFORMS .............................................................................................................................................
MECHANICAL EXPLODED VIEW ..............................................................................................................
MECHANICAL REPLACEMENT PARTS LIST ..........................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ............................................................................................
A1-1
A1-1
A1-2
A1-2
A1-2
A2-1
A3-1~A3-5
B1-1
B2-1, B2-2
C-1
C-1
C-1
D-1~D-4
E-1, E-2
F-1~F-4
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
H-1, H-2
I-1, I-2
J1-1
J2-1~ J2-3
GENERAL SPECIFICATIONS
G-1
TV
CRT
CRT Size / Visual Size
19 inch / 480.0mmV
System
CRT Type
Normal
Magnetic Field
BV/BH
+0.45G/0.18G
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
USA(W/ CATV)
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
CSA
Radiation
IC
X-Radiation
HWC
G-5
Temperature
Operation
+5oC ~ +40oC
Storage
-20oC ~ +60oC
G-6
Operating Humidity
Less than 80% RH
A3-1