Toshiba 21S23N User manual

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SERVICE MANUAL
PRINTED IN UK. 2003 C
COLOURTELEVISION
21S23N
TOSHIBA
FILE NO: 050-200247

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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

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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...............................................................................................................................................
STEREO .................................................................................................................................................
SCHEMATIC DIAGRAMS
MICON/TUNER.......................................................................................................................................
IF/CHROMA............................................................................................................................................
21PIN ......................................................................................................................................................
DEFLECTION/CRT.................................................................................................................................
POWER ..................................................................................................................................................
SOUND AMP ..........................................................................................................................................
STEREO .................................................................................................................................................
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
F-5, F-6
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
G-9, G-10
G-11, G-12
G-13, G-14
H-1~H-4
I-1
J1-1
J2-1~ J2-5

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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 2 Speaker
Position Front
Size 2.0 x4.7 Inch
Impedance 4 ohm
Sound Output MAX 5.0+5.0 W
10%(Typical) 4.0+4.0 W
DDR SECAM Yes
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 Yes
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

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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 Yes
Bass Yes
Treble Yes
Balance Yes
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 Yes
AV Color System Yes
Sound System No
Auto 4:3 Default No
AV2 Output Yes
Output Source Yes
Source Yes
Control Level Yes
Volume Yes
Brightness Yes
Contrast Yes
Color Yes
Tint (NTSC Only) Yes
Sharpness Yes
Tuning Yes
Bass Yes
Treble Yes
Balance Yes
Back Light No
Nicam ST Yes
G(A2)Stereo Yes
Tone 1/2 (A/B) Yes
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
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

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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 33 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 Yes
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
A3-3

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GENERAL SPECIFICATIONS
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 Yes
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
G-12 Accessories Owner's Manual Language English, Spanish, Portgal, 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
A3-4

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GENERAL SPECIFICATIONS
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 x2
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) Yes ( x1 )
S-INPUT Yes ( x1 )
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) 590 x 492 x 446.5
G-15 Weight Net (Approx.) 21.0 kg ( --- lbs)
Gross (Approx.) 23.8kg ( ---lbs)
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) 658 x 575 x 529
Design As per Buyer's
Description of Origin No
Drop Test Natural Dropping At 1
C
orner / 3 Edges
/
6
Su
rf
aces
Height (cm) 46
Container Stuffing 288 Sets/40' container
G-17 Cabinet Material Cabinet Front PS 94HB
Cabinet Rear PS 94HB
Holder PS 94V0 N
O
A3-5

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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

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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

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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

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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

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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 38 23 18 71 80 48 00 47
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
INI
10 80 80 80 3C 00 BA 06 9F10 00 33 80 00 02 1A 25
00 33 05 03 00 06 73
53 2D 6D C0 00 44 20 0A 0020 26 18 1E 00 DF CA 05
00 A7 7F 07 00 40 00 00 0030 95 00 00 00 00 00 00
0F 27 2B 2F 33 37 3B 3F 4040 23 41 42 43 44 45 46
47 49 4A 4B 4C 4D 4E 4F 5050 48 51 51 52 52 53 53
54 55 55 56 56 57 57 58 5860 54 59 59 5A 5A 5B 5B
5C 5D 5D 5E 5E 5F 5F 60 6070 5C 61 61 62 63 64 65
22 CD CF D3 D8 94 97 99 5280 25 54 56 57 59 5B 5D
5E --- --- --- --- --- --- --- ---90 5F --- --- --- --- --- ---

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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 115 ±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

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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

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ELECTRICAL ADJUSTMENTS
D-3
AB
BAR T'TEXT
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"
2-15: 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
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
V POSI TEXT
RF
00
00
00
45
05
00
25
16
30
02
50
10
50
10
127
31
00
15
00
135
57
57
AV
---
---
---
---
---
---
25
16
ADJ.
02
50
10
50
10
---
---
---
---
---
---
---
---
*To check for the fixed values of the RF (60Hz), indicate
the adjustment mode screen while input the 60Hz video
signal.
2-14: HORIZONTAL POSITION TEXT
1.
2.
3.
4.
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 (37) on the remote control to
select "H POSI TEXT".
Press the TEXT/MIN/TV button on the remote control.
Press the VOL. +/- button on the remote control until
the difference of A and B becomes minimum.
(Refer to Fig. 2-3)
Fig. 2-3

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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.

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ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
D-5
CP803B
CP802B
CP801
CRT
J801
FB401
STEREO PCB
J701
CP101
TU001 J702
J705 J704 J703
CP803A
CP802A
TP801
TP803
CRT
CP401
CP501
AC IN
CD501
SPEAKER
CP1001
CP502
CRT
VR501
TP501 R521
MAIN PCB
CRT PCB
CD803
CD802
L503
TP001
VR420 VR401
CD801

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MICON W/T.TEXT
IC101 OECF006A TU001
IF/CHROMA
IC201 STV2248C
A2/NICAM/DOLBY
IC902 MSP3410G
SOUND AMPIC
IC1002
LA4600
V-DRIVE
IC401 TDA8174A
FB401
SW TRANS
T501
CVBSOUT1
XTAL2
29
39
VCC_IF
VCC_D53
12
OSD-R36
XTAL140
VCC1
VCC217
45
OSD-G35
OSD-B34
FM_OUT11
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
SCL6
MEMORY
IC199
S-24C04BDP-LA
31
39
1
25
50
STANDBY LED
AVDD1
AVDD2
ON_TIMER
AVDD3
REMORT
OSC_OUT
51 OSC_IN
X101
4MHz
STAND BY/P.ON
D101
ON TIMER
D103
Q103
LED DRIVE
Q102
LED DRIVE
AT+5V
X602
3.579545MHz X601
4.433619MHz
1OS101
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
71
XTAL_OUT72
XTAL_IN
X901
18.432MHz
DVSUP
AVSUP66
11P.CON+5V
SDA3
SCL2I2C
ANA_IN1+ 67
AHVSUP
39P.CON+8V
DACM_L
27
DACM_R
28
10 8 3 1
+ +
+ - + -
3
4
2
6
7
5
1
HEADPHONEJACK
J702
SPEAKER
SP351
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
22
VIN1
1
2
24
6
27
23
19
20
INT_CVBS_OUT 13
VIDEO OUT
VIDEO IN
37
SC1_OUT_R 36
34
33
SC1_OUT_L
SC2_OUT_R
SC2_OUT_L
R OUT
L OUT
R OUT
L OUT
56
SC1_IN_R 57
53
54
SC1_IN_L
SC2_IN_R
SC2_IN_L
R IN
L IN
R IN
L IN
41
40
26
27
25
44
22
VIDEO OUT
VIDEO IN
11
7
15
21-B IN
21-G IN
21-R IN
CVBSOUT2
Y/CVBS_IN3
G_EXT/Y_EXT
R_EXT/V_EXT
B_EXT/U_EXT
51
50
SC3_IN_L
SC3_IN_R
VIN2
3
1
3
2
1
3
2
1
3
2
FRONT VIDEO
J703
FRONT AUDIO L
J704
FRONT AUDIO R
J705
BLOCK DIAGRAM
9
VOL UP
VOL DOWN
49
LR
4
VCC
SOUND+B
16 AT+5V
P.CON+5V
R
L
E-1 E-2

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SW501
TU001
CP101
J701
X601
L207
L208
D603
C611
L204
CF201
C220
C217
L601
L206
C213
C209
C206
IC201
R305
C002
L001 TP001
CP001
R213
C613
D607
D608
D606
CF303
CP902A
CP901A
D001
W001
W002
HS1002
C1013
C1011_1
C1010
IC1002
D1003
D1002
C121
W801
X101
SH101
IC101
W003
R112
W004
R528
L102
L101
SW107
SW106SW104
SW102
R136
D102
W005
C131_1
C115
J704 J703
J705J702
R725
R706
C736
C737
W006
W007
W008
W009
Q702
D712
D723
C725
C760 C724
R708
C717
R711
R701
C723
Q701
C718
R712
R715
R714
R716
R713
L701
L702
L705
L703
L706
L707
L709
L704
L708
L712
L711
L710
IC702
W010
W011
C748
L713
W012
W013
C1014
D611 D610
D609
C628_1
W803
W015
W016
W017
W018
L203
W019
R620
W020
W021
W022
W023
W024
W025 W026 W027 W028
C743
C624
R609
D108
W030
W031
W032
D1001
IC199
W033
R144 R145
R146
R147
W035
W036 W037
W038
W039
CP802A
C210
W041
W042
W043
R543
W044
W045
W046
W047
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
C443
CP401
T401_1
IC401
C403
D410
R421
R427
Q402
R446
C440_1
C439
C414
C448
C422
R416
C418
R407
R428
C417
R417
D408
D403
R426
D401
D402
R418
C412
HS401
R501
C527
C508
R527
D524
D523
R522
R536
C542
IC506
R533
D507
R511
W814
HS503
R512
Q507
D528 R513
R515
W817
C517_1
IC502
HS502
R509
C442_1
R521
C512
C515
R419
Q509
R530
R524
C503
R544
R545
Q513
R546
Q514 R547
C528
C533
Q511
C511
C523
Q505
D506
R514
CP502
D517
C522
R507
D406
W054
D404
R410
R431
D514
D521
D527 R548
W055
R445
R430
W056
W057
R532
VR501
W059
D604
W060
W061
W062
R542
W063
W064
W065
W066
W067
W069
C402
TP501
W825
L716
L715
R150
W072
W073
W074
W075
W076
B702
B701
C1002
C1012_2
W077
D101
D103
W078
W079
C408
C130
L202
R503
X602
W080
W081
W082
W083
B504
W086
D508
D407
R409
C757
W089
W090
W092
W095
W096
W097
W098
W099
W100
W101
W102
W103
W104
W105W106 W107
W108
W109
R750
W110
W111
W113
R626
W114
C634
C1015
W116
C602
C604
OS101
W117
C405
W842
W844
W843
C446
W118 W119
W121
W123
W124
W125
W127
W128
W129
R1014
W132
C509
D526
W133
W134
W136
B501
HS501
Q501
W137
W138 W139
R707
D405
W140
W826
RY501
W141
W142
W143
W144
D511
D519
IC503
C531
W145
D505
W146
W147
W148
W816
D525
R508
CP1001
C406
R813
R801
R807
Q806
D803
Q802
Q801
Q805 R816
R819
J801
Q804
Q803
R803
R809
L804
L802
L803
D802
R804 R810
TP803
TP801
TP802
R815
D801
CP803B
CP802B
W070
C801
L403
C518_2
R402
R751
C525
C728
W084
R425
W091
R413
TP503
ICP501
W052
W112
R550
C410
R423
R422
W852
W822
C407
R403
CP601
W094
W131
W087
CP803A
C1018
W851
R424
R429
W088
W115
L801_1
S802Y
S802X
C1019
R1001
W126
W861
TP502
ICP502
W847
L401
C437_2
C404
R411
W149
W863
W150
W832
W827
R154
W810
W855
W864
R647
W839
W853
W809
W828
Q401
TH501
W841
W813
W802
CF204
C003
L303
CF301_1
L301
CF202_1
CP801_2
C540_1
T501
S806X
S806Y
W058 CD802A
CD802B
CD803A
CD803B
PRINTED CIRCUIT BOARDS
MAIN/CRT (INSERTED PARTS)
SOLDER SIDE
F-1 F-2