Toshiba 21N21N User manual

SERVICE MANUAL
PRINTED IN UK. 2003 C
COLOURTELEVISION
21N21N
TOSHIBA
FILE NO: 050-200244

SERVICING NOTICES ON CHECKING
6. AVOID AN X-RAY1. 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 ......................................................................................................................................................
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
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 No
NTSC3.58(AV)+NTSC4.43 Yes
PAL60Hz Yes
G-2 Tuning Broadcasting System CCIR System B/G
System Tuner and System 1Tuner
Receive CH Destination Hyper
Tuning System F-Synth
Input Impedance VHF/UHF 75 ohm
E2 - E4, X - Z+2, S1 - S10, E5 - E12,
CH Coverage S11 - S41, E21 - E69
B/G
Intermediate Picture(FP) 38.9 MHz
Frequency Sound(FS) 33.4 MHz
FP-FS 5.5MHz
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
Wide Mode No
Sound Mute Yes
G-8 OSD Language English French Spanish
German Italian
Greek Turkish Swedish
Dutch Portuguese
Norwegian Finnish Danish
G-9 Clock and Sleep Timer Max Time - Min
Timer Step - Min
Clock No
On Timer Program( On Timer) Yes
Off Timer Program( Off Timer) Yes
Wake Up Timer No
Timer Back-up (at Power Off Mode) more than -- Min Sec
A3-2

GENERAL SPECIFICATIONS
G-10 Remote Unit RC-EY
Control Glow in Dark Remocon No
Format NEC
Custom Code 40-BF h
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 32 Keys
Keys Power Yes
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0 Yes
Volume Up / + Yes
Volume Down / - Yes
Previous Yes
Select Picture Yes
Menu Yes
OK(Enter) Yes
EXIT No
Audio Select No
Sleep Timer No
Mute Yes
T'TEXT Keys TEXT / MIX / TV Yes
CH Up / Page Up Yes
CH Down / Page Down Yes
Red Yes
Green Yes
Yellow Yes
Cyan Yes
TEXT F/T/B Yes
Reveal Yes
TIMED PAGE(SUB PAGE) Yes
CALL / TEXT INDEX Yes
INPUT SELECT Yes
TEXT HOLD Yes
TIME / TXCL Yes
G-11 Features Auto Degauss Yes
Auto Shut Off Yes
Canal+ No
CATV No
Anti-theft(Back Up 30 Min.) No
Memory(Last CH) Yes
Memory(Last Volume) Yes
BBE No
Auto Search Yes
CH Allocation Yes
Just Clock Function No
Game Position No
CH Label No
VM Circuit No
Full OSD No
Unitext No
Fastext Yes
Top Text Yes
Premiere No
Comb Filter No
Lines
Auto CH Memory No
Stable Sound No
Auto Set Up No
FBT Leak Test Protect Yes
Previous (Quick View) Yes
Panel Lock Yes
Power ON Memory Yes
Double Focus & Dynamic Focus No
Wss Signal Wide Change No
Virtual Dolby Surround No
Hotel Lock No
A3-3

GENERAL SPECIFICATIONS
G-12 Accessories Owner's Manual Language English, Spanish, Portugal, Swedish,
Norwegian
w/Guarantee Card No
Remote Control Unit Yes
Rod Antenna No
Poles Pole
Terminal type
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 Safeguard Yes (Owner's Manual In)
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet Yes
Battery Yes
UM size x pcs UM-4 x 2 pcs
OEM Brand No
AC Cord No
AV Cord (2Pin-1Pin) No
Registration Card No
PTB Sheet No
300 ohm to 75 ohm Antenna Adapter No
G-13 Interface Switch Front Power (Tact Sw) No
System Select No
Main Power SW Yes
Sub Power No
Channel Up Yes
Channel Down Yes
Volume Up Yes
Volume Down Yes
Rear AC/DC No
TV/CATV Selector No
Degauss No
Main Power SW No
Indicator Power No
Stand-by No
Stand-by/ON Yes(Red)
On Timer Yes(Green)
Terminals Front Video Input RCA
Audio Input RCA
Other Terminal Head Phone (Stereo)
Rear Video Input(Rear1) No
Video Input(Rear2) No
Audio Input(Rear1) No
Audio Input(Rear2) No
Video Output No
Audio Output No
Euro Scart(21Pin) No
S-INPUT
Euro Scart(21Pin) Yes ( x1 )
RGB-INPUT Yes ( x1 )
Component Input No
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input D Type
AC Outlet No
G-14 Set Size Approx. W x D x H (mm) 506.6 x 484 x 464.5
G-15 Weight Net (Approx.) 21.0 kg ( --- lbs)
Gross (Approx.) 23.8kg ( ---lbs)
A3-4

GENERAL SPECIFICATIONS
G-16 Carton Master Carton No
Content ---- Sets
Material -- /--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin ---
Gift Box Yes
Material Double/Brown
Dimensions W x D x H(mm) 580 x 575 x 555
Design As per Buyer's
Description of Origin Yes
Drop Test Natural Dropping At 1
C
orner
/
3
E
dges
/
6
Su
rf
aces
Height (cm) 46
Container Stuffing 320 Sets/40' container
G-17 Cabinet Material Cabinet Front PS 94V0 NON-DECABROM
Cabinet Rear PS 94 HB
Holder PS 94V0 N
O
A3-5

1. REMOVAL OF ANODE CAP
Read the following NOTED items before starting work.
After turning the power off there might still be a potential
voltage that is very dangerous. When removing the
Anode Cap, make sure to discharge the Anode Cap's
potential voltage.
Do not use pliers to loosen or tighten the Anode Cap
terminal, this may cause the spring to be damaged.
*
*
REMOVAL
1. Follow the steps as follows to discharge the Anode Cap.
(Refer to Fig. 1-1.)
Connect one end of an Alligator Clip to the metal part of a
flat-blade screwdriver and the other end to ground.
While holding the plastic part of the insulated Screwdriver,
touch the support of the Anode with the tip of the
Screwdriver.
A cracking noise will be heard as the voltage is discharged.
Flip up the sides of the Rubber Cap in the direction of the
arrow and remove one side of the support.
(Refer to Fig. 1-2.)
2.
DISASSEMBLY INSTRUCTIONS
GND on the CRT
Screwdriver
Alligator Clip
Support CRT
GND on the CRT
Rubber Cap
CRT Support
Fig. 1-1
Fig. 1-2
3. After one side is removed, pull in the opposite direction to
remove the other.
NOTE
Take care not to damage the Rubber Cap.
INSTALLATION
1. Clean the spot where the cap was located with a small
amount of alcohol. (Refer to Fig. 1-3.)
B1-1
Location of Anode Cap
Fig. 1-3
NOTE
Confirm that there is no dirt, dust, etc. at the spot where
the cap was located.
2.
3.
Arrange the wire of the Anode Cap and make sure the
wire is not twisted.
Turn over the Rubber Cap. (Refer to Fig. 1-4.)
Fig. 1-4
4. Insert one end of the Anode Support into the anode button,
then the other as shown in Fig. 1-5.
5.
6. Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts.
CRT Support Fig. 1-5

B2-1
Masking Tape
(Cotton Tape)
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL
IC
Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 2-1.)
1.
Fig. 2-1
NOTE
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Blower type IC
desoldering machine
IC
Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 2-2.)
2.
Fig. 2-2
NOTE
Do not add the rotating and the back and forth
directions force on the IC, until IC can move back and
forth easily after desoldering the IC leads completely.
When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 2-3.)
3.
Blower type IC
desoldering
machine
IC Fig. 2-3
Tweezers
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 2-4.)
5.
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
Fig. 2-4
IC pattern

B2-2
DISASSEMBLY INSTRUCTIONS
Supply soldering
from upper position
to lower position
IC
Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
2.
Fig. 2-6
Soldering IronSolder
IC
Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 2-7.)
3.
Fig. 2-7
Soldering Iron
Braided Shield Wire
NOTE
Do not absorb the solder to excess.
IC
When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 2-8.)
4.
Fig. 2-8
Thin-tip Soldering Iron
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, be always sure to replace the IC in this
case.
Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
5.
Solder temporarily
Soldering Iron
INSTALLATION
Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
1.
Fig. 2-5
Solder temporarily

C-1
Reset the user setting items (PICTURE, VOLUME, LANGUAGE and NICAM AUTO/
OFF) to the initial state for delivery.
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter the Service Mode, press both set key and remote control key for more than 2 seconds.
Set Key Remocon Key Operations
CONFIRMATION OF HOURS USED
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
NOTE: If you set a factory initialization, the total hours is reset to "0".
1.
2.
3.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 2 seconds.
After the confirmation of using hours, turn off the power.
ADDRESS DATA
INIT 01 00
CRT ON 0010
FIG. 1
Initial setting content of MEMORY IC.
POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
VOL. (-) MIN 1
Initialization of the factory.
NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset such as the channel
setting, and the POWER ON total hours.
VOL. (-) MIN 6
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF HOURS USED".
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
VOL. (-) MIN 0
VOL. (-) MIN 8 Writing of EEPROM initial data.
NOTE: Do not use this for the normal servicing.
VOL. (-) MIN Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
9

C-2
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
WHEN REPLACING EEPROM (MEMORY) IC
Table 1
1.
2. Enter DATA SET mode by setting VOLUME to minimum. Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
ADDRESS and DATA should appear as FIG 1.
3.
4.
5.
6.
7.
8.
9.
10.
11.
The unit will now have the correct DATA for the new MEMORY IC.
ADDRESS is now selected and should "blink". Using the VOL. +/- button on the remote, step through the ADDRESS until
required ADDRESS to be changed is reached.
Press OK to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using VOL. +/- button until required DATA value has been selected.
Pressing OK will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn POWER on.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.
Fig. 1
ADDRESS DATA
INIT 01 00
CRT ON 0010
--- 00 00 00 00 61 80 48 08 43
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
INI
10 80 80 80 3C 00 7C 06 9F10 00 32 80 00 44 28 22
00 27 05 83 00 06 73
51 32 6D C0 00 42 20 0F 0020 33 18 00 B0 DD DC 05
00 9D 7F 07 00 00 00 00 0030 95 00 00 00 00 00 00
7F 5F 4F 3F 39 34 2F 2D 2B40 6F 29 27 25 23 21 20
1F 1D 1C 1B 1A 19 18 17 1650 1E 15 14 13 13 12 12
11 10 10 0F 0F 0E 0E 0D 0D60 11 0C 0C 0B 0B 0A 0A
09 08 08 07 07 06 06 06 0570 09 05 05 04 04 04 04
22 CD CF D3 D8 94 97 99 5280 25 54 56 57 59 5B 5D
5E --- --- --- --- --- --- --- ---90 5F --- --- --- --- --- ---

ELECTRICAL ADJUSTMENTS
D-1
2. BASIC ADJUSTMENTS
2-1: CONSTANT VOLTAGE
1.
2.
3.
4.
Place the set with Aging Test for more than 5 minutes.
Connect the digital voltmeter to TP501.
Set condition is AV MODE without signal.
Adjust the VR501 until the DC voltage is 117 ±0.5V.
1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
•
•
•
Use an isolation transformer when performing any
service on this chassis.
Before removing the anode cap, discharge electricity
because it contains high voltage.
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
When you exchange IC and Transistor for a heat sink,
apply the silicon grease on the contact section of the
heat sink. Before applying new silicon grease, remove all
the old silicon grease. (Old grease may cause damages
to the IC and Transistor).
1. Oscilloscope
2. Digital Voltmeter
3. Pattern Generator
Prepare the following measurement tools for electrical
adjustments.
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Receive the VHF HIGH (63dB).
Connect the digital voltmeter to pin 5 of CP101.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "RF AGC".
Press the VOL. +/- button on the remote control until the
digital voltmeter is 2.50 ±0.05V.
2-3: AGC VOLTAGE
2-4: CUT OFF
2-2: VCO
1.
2.
3.
4.
5.
6.
Place the set with Aging Test for more than 10 minutes.
Connect the oscillator (38.9MHz) to TP001.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (13) on the remote control to
select "VCO COARSE".
Press the VOL. +/- button on the remote control until
the "OK" appear on the screen. If the "OK" is not
displayed, select the "+" side on the changed from "+"
to "-".
Press the Page UP button once to set to "VCO FINE"
mode.
Press the VOL. +/- button on the remote control to
select the 5 step down point from the upper limit on the
"OK".
(Example: In case of the "OK" range 30~41, select 36.)
1.
2.
3.
4.
5.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Place the set with Aging Test for more than 15 minutes.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (00) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
2-5: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
Place the set with Aging Test for more than 15 minutes.
Receive the gray scale pattern from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select "R DRIVE".
Press the Page UP/DOWN button on the remote control
to select the "R DRIVE", "G DRIVE", "M R CUTOFF" or
"M G CUTOFF".
Adjust the VOL. +/- button on the remote control to
whiten the R DRIVE, G DRIVE, M R CUT OFF, and M G
CUT OFF at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
On-Screen Display Adjustment
1. In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
2 seconds to appear the adjustment mode on the
screen as shown in Fig. 1-1.
2.
3.
Use the Channel button (0-9) or Channel UP/DOWN
button on the remote control to select the options
shown in Fig. 1-2.
Press the MENU button on the remote control to end
the adjustments.
NO.
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
FUNCTION
CUT OFF
RF AGC
AGC GAIN
R DRIVE
R CUTOFF
G DRIVE
G CUTOFF
B DRIVE
H POSI (50)
V POSI (50)
V POSI (60)
V SIZE (50)
V SIZE (60)
VCO COARSE
VCO FINE
VCO COARSE L1
VCO FINE L1
BRIGHT CENT
BRIGHT MAX
BRIGHT MIN
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
FUNCTION
TINT
SHARP
CONTRAST CENT
CONTRAST MAX
CONTRAST MIN
COLOR CENT
COLOR MAX
COLOR MIN
M R CUT OFF
M G CUT OFF
M B CUT OFF
CVBS OUT
APR THRESHOLD
BELL FILTER
BANDPASS
H POSI OSD
V POSI OSD
H POSI TEXT
V POSI TEXT
H POSI (60) Fig. 1-2
Fig. 1-1
9- EXT VCO Status -
MMM
35 H POSI OSD
36 V POSI OSD
37 H POSI TEXT
38 V POSI TEXT
39 H POSI 60
00 CUT OFF
117
57
117
57
45

ELECTRICAL ADJUSTMENTS
D-2
Receive a 70dB monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-6: FOCUS
1.
2.
3.
2-7: HORIZONTAL POSITION
1.
2.
3.
4.
5.
6.
7.
8.
9.
Receive the monoscope pattern from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (08) on the remote control to
select "H POSI (50)".
Press the VOL. +/- button on the remote control until
the SHIFT quantity of the OVER SCAN on right and left
becomes minimum.
Receive the monoscope pattern of NTSC. (Audio Video
Input)
Set to the AV mode.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (39) on the remote control to
select "H POSI (60)".
Press the VOL. +/- button on the remote control until
the SHIFT quantity of the OVER SCAN on right and left
becomes minimum.
2-11: CONTRAST CENT
1.
2.
3.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "CONTRAST CENT".
Press the VOL. +/- button on the remote control until
the contrast step No. becomes "35".
Receive a broadcast and check if the picture is normal.
Set to the AV mode. Then perform the above
adjustment 1~3.
2-10: BRIGHT CENT
1.
2.
3.
4.
5.
6
7.
Receive the PAL black pattern*. (RF Input)
Using the remote control, set the brightness and
contrast to normal position.
Place the set with Aging Test for more than 15 minutes.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (17) on the remote control to
select "BRIGHT CENT".
Press the VOL. +/- button on the remote control until
the screen begin to shine.
Receive the PAL black pattern*. (Audio Video Input)
Set to the AV mode. Then perform the above
adjustments 2~5.
*The Black Pattern means the whole black raster signal.
Select the "RASTER" of the pattern generator, set to
the OFF position for each R, G and B.
2-8: VERTICAL POSITION/VERTICAL LINEARITY
1.
2.
3.
4.
Receive the monoscope pattern from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
Adjust the VR420 until the SHIFT quantity of the OVER
SCAN on upside and downside becomes minimum.
Receive the monoscope pattern from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
select "V SIZE (50)".
Press the VOL. +/- button on the remote control adjust
the V.SIZE becomes 8 ±2%.
Receive a broadcast and check if the picture is normal.
Receive the monoscope pattern of NTSC. (Audio
Video Input)
Set to the AV mode.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (12) on the remote control to
select "V SIZE (60)".
Press the VOL. +/- button on the remote control adjust
the V.SIZE becomes 10 ±2%.
Receive a broadcast and check if the picture is normal.
2-9: VERTICAL SIZE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
2-12: COLOR CENT
1.
2.
3.
4.
5.
6.
7.
8.
Receive the PAL color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast
and color to normal position.
Connect the oscilloscope to TP801.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (25) on the remote control to
select "COLOR CENT".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 5 scales on the screen of the oscilloscope.
Press the VOL. +/- button on the remote control until
the red color level is adjusted to 90 ±10% of the white
level. (Refer to Fig. 2-1)
Receive the PAL color bar pattern. (Audio Video Input)
Set to the AV mode. Then perform the above
adjustments 2~6.
Fig. 2-1
90% 100%
White 100% Red Level

ELECTRICAL ADJUSTMENTS
D-3
2-13: TINT
1.
2.
3.
4.
5.
Receive the NTSC color bar pattern. (Audio Video Input)
Using the remote control, set the brightness and contrast
to normal position.
Connect the oscilloscope to TP803.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (20) on the remote control to
select "TINT".
Press the VOL. +/- button on the remote control until the
section "A" becomes a straight line. (Refer to Fig. 2-2)
Fig. 2-2
"A"
2-14: Confirmation of Fixed Value (Step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
NO.
02
04
06
07
09
10
18
19
20
21
23
24
26
27
30
31
32
33
34
35
36
37
38
FUNCTION
AGC GAIN
R CUTOFF
G CUTOFF
B DRIVE
V POSI (50)
V POSI (60)
BRIGHT MAX
BRIGHT MIN
TINT
SHARP
CONTRAST MAX
CONTRAST MIN
COLOR MAX
COLOR MIN
M B CUT OFF
CVBS OUT
APR THRESHOLD
BELL FILTER
BANDPASS
H POSI OSD
V POSI OSD
H POSI TEXT
V POSI TEXT
RF
00
00
00
45
05
00
25
10
30
02
50
15
50
10
127
31
00
10
00
130
50
125
57
AV
---
---
---
---
---
---
25
10
ADJ.
02
50
15
50
10
---
---
---
---
---
---
---
---
---
*To check for the fixed values of the RF (60Hz), indicate
the adjustment mode screen while input the 60Hz video
signal.

ELECTRICAL ADJUSTMENTS
D-4
3.
1.
2.
3.
1.
2.
3.
4.
5.
6.
7.
8.
3-2: PURITY
NOTE
Adjust after performing adjustments in section 3-1.
1.
2.
3.
4.
5.
Receive the green raster pattern from color bar
generator.
Adjust the pair of purity magnets to center the
color on the screen.
Adjust the pair of purity magnets so the color at the
ends are equally wide.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole
screen is green.
Confirm red and blue colors.
Adjust the slant of the deflection yoke while watching the
screen, then tighten the fixing screw.
DEFLECTION YOKE
DEFLECTION YOKE SCREW
MAGNET SCREW
PURITY MAGNETS
6 POLE MAGNETS
4 POLE MAGNETS
Fig. 3-1
PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
NOTE
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 3-1)
If the deflection yoke and magnet are in one body,
untighten the screw for the body.
Receive the green raster pattern from the color bar
generator.
Slide the deflection yoke until it touches the funnel
side of the CRT.
Adjust center of screen to green, with red and blue on the
sides, using the pair of purity magnets.
Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of
4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
Adjust the crosshatch pattern to change to white
by repeating steps 6 and 7.
Turn the unit on and let it warm up for at least 30
minutes before performing the following adjustments.
Place the CRT surface facing east or west to reduce the
terrestrial magnetism.
Turn ON the unit and demagnetize with a Degauss Coil.
Adjust after performing adjustments in section 3-2.
3-3: STATIC CONVERGENCE
1.
2.
3.
3-4: DYNAMIC CONVERGENCE
NOTE
Adjust after performing adjustments in section 3-3.
1.
2.
Adjust the differences around the screen by moving
the deflection yoke upward/downward and right/left.
(Refer to Fig. 3-2-a)
Insert three wedges between the deflection yoke and
CRT funnel to fix the deflection yoke.
(Refer to Fig. 3-2-b)
R G B
R
G
B
Fig. 3-2-a
WEDGE WEDGE
WEDGE
WEDGE POSITION
Fig. 3-2-b
R G B
R
G
B
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
Receive the crosshatch pattern from the color bar
generator.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of
4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.

ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
D-5
CP803B
CP802B
CP801
CRT
J801
FB401
CP101
TU001
J702
J704
J703
CP803A
CP802A
TP801
TP803
CRT
CP401
SPEAKER
CP1002
CP502
CRT
VR501
TP501 R521
MAIN PCB
CRT PCB
CD803
CD802
L503
TP001
VR420 VR401 J701
CP501
AC IN
CD501
CD801

MICON W/T.TEXT
IC101 OECF006A TU001
IF/CHROMA
IC201 STV2246C
AUDIO SW
IC701 NJM2234L
SOUND AMPIC
IC1002
LA4600
V-DRIVE
IC401 TDA8174A
FB401
SW TRANS
T501
CVBSOUT1
XTAL2
29
39
VCC_IF
VCC_D
53
12
OSD-R
36
XTAL140
VCC1
VCC2
17
45
OSD-G
35
OSD-B
34
FM_OUT
11
7 154 11
SCL SDA BPL AGC IF
768
I2C
P.CON+5V
SDA 19
OSD-B
OSD-G 16
15
SCL 20
OSD-R
CVBS2 33
17
CVBS1 34
SDA
5
SCL
6
MEMORY
IC199
S-24C04BDP-LA
31
39
1
25
50
STANDBY LED
AVDD1
AVDD2
ON_TIMER
AVDD3
REMORT
OSC_OUT
51 OSC_IN
X602
3.579545MHz X601
4.433619MHz
RF_AGC_OUT
PIFIN1
PIFIN2
VERT 47
SDA
H_OUT 48
52
SCL 51
B.OUT
G.OUT 31
30
R.OUT 32
P.CON+5V
P.CON+8V
3TRIGGER INPUT
10
1
Vs
POWER OUTPUT
P.CON+25V
Q805, Q806
BULE OUT
Q803, Q804
GREEN OUT
Q801, Q802
RED OUT
J801
6
11
8
F
7
Q402
H.DRIVE
Q401
H.OUTPUT
I2C
DY
1
F
S
2
3
HV
+B
P.CON+25V
CRT
V801
83
+
+ -
3
4
2
6
7
5
1
HEADPHONE JACK
J702
SPEAKER
SP353
5
12
9SOUND+B
15
+B
P.CON+8V
D
Q501
POWER
SW TR
56
KEY_IN CH DOWN
CH UP
VIDEO_SW
IC702 NJM2234L
V.OUT
SW1
2
7
SW2
4
CVBSIN2 20
AV1 42
AV2 43
J701
3
1
VIN1
1
2
6
8
19
20
INT_CVBS_OUT 13
VIDEO OUT
VIDEO IN
R OUT
L OUT
1
Vin 2 3
4
7
Vin 1
V.OUT
SW 2
R IN
L IN
FOR VCR
16
26
27
25
28
21-Y IN
11
7
15
21-B IN
21-G IN
21-R IN
BLK_EXT
G_EXT/Y_EXT
R_EXT/V_EXT
B_EXT/U_EXT
2
SW 1
VIN2
3
1
3
2
1
3
2
FRONT VIDEO
J703
FRONT AUDIO L
J704
BLOCK DIAGRAM
9
VOL UP
VOL DOWN
49
4
VCC
SOUND+B
16 AT+5V
P.CON+5V
X101
4MHz
STAND BY/P.ON
D101
ON TIMER
D103
Q103
LED DRIVE
Q102
LED DRIVE
AT+5V
1
OS101
53
FORTHD VCR1
EXT_AUDIO_IN
14
AUDIO_OUT
55
Q204
SIF BUFFER
Q703
BUFFER
NC
E-1 E-2

CP806_1
SW501
TU001
CP101
X601
CF204
L207
L208
D603
C611
L204
CF201
C220
C217
L601
C213
C209
IC201
C003 C002
L001 TP001
CP001
R213
C613
D607
D608
D606
CF303
D001
W002
HS1002
C1013
C1011
C1010
IC1002
D1003
C1003 D1002
C121
W801
X101
SH101
IC101
W003
R112
W004
R528
L102
L101
SW107
SW106SW104SW102
C122
R136
D102
W005
C131_1
C115
J704 J703
J702
R725
R706
C736
W830
W008
W009
Q702
D712
C725
C724
C717
R711
R701
R715
R714
R716
R713
L706
L707
L704
L708
L711
W804
IC701
C742
C715
L713
W013
C621
D611 D610
D609
C628
W803
W016
L203
W019
R620
W021
W022
W024
W025 W026 W027
C624
R609
D108
W029
W031
D1001
IC199
W033
R144 R145
R146
R147
W035
W036 W037
W038
W039
CP802A
C210
W041
W042
W043
R543
W044
W045
W046
W047
R703
W813
W829
W048
D515
D512
W049
W050
W051
FB401
VR401 VR420
L501
C501
CP501
FH502 FH501
C526
D504
D503
D502
D501
C506
C507
C505
IC501
D520
D516
D513
F501
HS402
C404
CP401
IC401
C403
D410
R421
T401_1
R427
Q402
R446
C440
C439
C414
C448
R401
C422
R416
R414
C418
R407
R428
C417
R417
D408
D403 R426
R415
D401
D402
R418
C412
HS401
R501
C527
C437_1
C508
R527
D524
D523
R522
R536
C542
IC506
R533
D507
R511
W814
Q401
HS503
R512
Q507
D528 R513
R515
C517_1
IC502
HS502
R509
C442_1
R521
C512
C515
L401
R419
Q509
R530R524
C503
R544
R545
Q513
R546
Q514 R547
C528
C533
Q511
C511
C523
Q505
D506
R514
TH501
CP502
D517
C522
R507
D406
W054
D404
R410
R431
D514
D521
D527 R548
W055
R445
W056
W057
R532
VR501
W059
D604
W060
W061
W062
R542
T501_1
W063
W065
W066
W067
W069
TP501
W825
L715
W071
W072
W073
W074
W075
W076
B702
B701
C1002
C1012
W077
D101
D103
W078
W079
C408
C130
L202
R503
X602
W080
W081
W833
W082
W083
B504
W086
D508
D407
R409
C757
W089
W090
C540
W093
W095
W096
W097
W098
W099
W100
W101
W102
W103
W104
W105W106
W109
R750
CF202_1
W110
W111
R626
W114
C1015
W116
C602_1
W841
L717
OS101
W117
C405
W842
W844
W843
C446
W846
W119
R1008
W125
W127
W128
W129
R1014
R411
C509
D526
W133
W134
W136
B501
HS501
Q501
W137
W138 W139
R707
D405
W140
W826
RY501
W141 W144
D511
D519
IC503
C531
W145
D505
W146
W147
W148
W816
D525
R508
W070
CP1002
L403
C518
R402
C525
W084
R425
W091
TP503
ICP501
W052
W112
R550
R423
R422
W822
R126
C407
R403
W094
W131
W087
CP803A
C1018
W851
W088
W115
S802Y
S802X
C1019
R1001
W126
TP502
ICP502
J701
W015
W011
W143
L801
C801
TP802
TP801
TP803
R810
R804
D802
L803
L802
L804
R809
R803
Q803
Q804
J801
R815
R819
CP803B
CP802B
R816
Q805 Q801
D801
Q802
D803
Q806
R807
R801
R813
CP801
W149
W847
IC702
C743
C748
C728
W150
R432
W118
W832
W810
W839
W867
W828
S803Y
S803X
W819
W809
B502
L206
C634_3
S804X
S804Y
C641
D612
B505
CD802A
CD802B
CD803A
CD803B
D614
D615
PRINTED CIRCUIT BOARDS
MAIN/CRT (INSERTED PARTS)
SOLDER SIDE
F-1 F-2