Toshiba 27AFX55 User manual

SERVICE MANUAL
COLOR TELEVISION
DOCUMENT CREATED IN JAPAN, July, 2005
27AFX55
(MFR’S VERSION A)
FILE NO. 050-200526

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
When you exchange IC and Transistor with a heat sink, apply silicon grease on the contact section of
the heat sink. Befor applying new silicon grease, remove all the old silicon grease. (Old grease may
cause damages to the IC and Transistor.)
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
Headphone jack
A1-1
Licensed by BBE Sound, Inc. under USP5510752 and 5736897.
BBE and BBE symbol are registered trademarks of BBE
Sound, Inc.

PCBs (manufactured) using lead free solder will have a PbF printing on the PCB.
(Please refer to figures.)
Caution:
Pb free solder has a higher melting point than standard solder;
Typically the melting point is 50°F~70°F(30°C~40°C) higher.
Please use a soldering iron with temperature control and adjust it to 650°F ±20°F (350°C ±10°C).
In case of using high temperature soldering iron, please be carefull not to heat too long.
Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C).
All products with the printed circuit board with PbF printing must be serviced with lead free solder.
When soldering or unsoldering, completely remove all of the solder from the pins or solder area,
and be sure to heat the soldering points with the lead free solder until it melts sufficiently.
Distinction of PbF PCB:
Recommendations
Recommended lead free solder composition is Sn-3.0Ag-0.5Cu.
ABOUT LEAD FREE SOLDER (PbF)
•
•
•
A1-2

TABLE OF CONTENTS
SERVICING NOTICES ON CHECKING.....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
IMPORTANT ...............................................................................................................................
ABOUT LEAD FREE SOLDER (PbF)........................................................................................
TABLE OF 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 DIAGRAMS ...................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN ........................................................................................................................................
CRT/VM COIL/POWER...........................................................................................................
SCHEMATIC DIAGRAMS
MICON .....................................................................................................................................
CHROMA .................................................................................................................................
DEFLECTION ..........................................................................................................................
POWER ...................................................................................................................................
SOUND ....................................................................................................................................
TUNER/STEREO.....................................................................................................................
AV ............................................................................................................................................
COMB FILTER.........................................................................................................................
CRT/SVM.................................................................................................................................
SUB POWER ...........................................................................................................................
WAVEFORMS .............................................................................................................................
MECHANICAL EXPLODED VIEWS...........................................................................................
MECHANICAL REPLACEMENT PARTS LIST .........................................................................
ELECTRICAL REPLACEMENT PARTS LIST...........................................................................
A1-1
A1-1
A1-1
A1-2
A2-1
A3-1~A3-5
B1-1
B2-1, B2-2
C-1
C-1
C-1
D-1~D-6
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
G-15, G-16
G-17, G-18
G-19, G-20
H-1, H-2
I-1, I-2
J1-1
J2-1~J2-5
A2-1

GENERAL SPECIFICATIONS
G-1 TV CRT CRT Size / Visual Size 27 inch / 676.0mmV
System CRT Type Flat
Magnetic Field BV/BH +0.45G/0.18G
Color System NTSC
Speaker 2 Speaker
Position Front Side
Size 1.8 x 3.9 Inch
Impedance 8 ohm
Sound Output MAX 5.0+5.0 W
10%(Typical) - 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/ Cable)
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 Yes
Tuner Sound Muting Yes
G-3 Power Power Source AC 120V AC 60Hz
DC
Power Consumption at AC 135 W at AC 120 V 60 Hz
Stand by (at AC) 3 W at AC 120 V 60 Hz
Per Year -- kWh/Year
Protector Power Fuse Yes
Safety Circuit Yes
IC Protector(Micro Fuse) No
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

GENERAL SPECIFICATIONS
G-7 On Screen Menu Yes
Display Menu Type Icon
Picture Yes
Contrast Yes
Brightness Yes
Color Yes
Tint Yes
Sharpness Yes
Sound Yes
Bass Yes
Treble Yes
Balance Yes
BBE On/Off Yes
Stable Sound On/Off Yes
Surround On/Off Yes
Set Up Yes
TV/Cable Yes
Auto CH Memory Yes
Add/ Delete Yes
Option Yes
Language Yes
CH Label Yes
Favorite CH Yes
V-Chip No
Lock Yes
On/Off Timer Yes
Color Stream DVD/DTV Yes
Control Level Yes
Volume Yes
Brightness Yes
Contrast Yes
Color Yes
Tint Yes
Sharpness Yes
Tuning No
Bass Yes
Treble Yes
Balance Yes
Back Light No
Stereo,Audio Output,SAP Yes
Video Yes
Color Stream Yes
Channel(TV/Cable) Yes
CH Label Yes
Game Timer Yes
Sleep Timer Yes
Sound Mute Yes
V-chip Rating No
16: 9 Yes
G-8 OSD Language English French Spanish
G-9 Clock and Sleep Timer Max Time 120 Min
Timer Step 10 Min
On/Off Timer Program(On Timer / 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-LR
Control Glow in Dark Remocon Yes
Format Toshiba
Remocon Format Toshiba
Custom Code TV:40-BF h
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 48 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/ +10 Yes
CH Up/Cursor Up Yes
CH Down/Cursor Down Yes
Volume Up/Cursor right Yes
Volume Down/Cursor Left Yes
TV/Caption/Text Yes
CH1/CH2 Yes
TV/Video(TV/AV) Yes
CH RTN(Quick View) Yes
Sleep Yes
DISPLAY(RECALL)/CODE Yes
Reset Yes
Menu/Enter/DVD Menu Yes
Mute Yes
Exit Yes
MTS(Audio Select) Yes
Fav.Up Yes
Fav.Down Yes
16: 9/GUIDE Yes
Multi Brand Keys CH Up(VCR) Yes
CH Down(VCR) Yes
Pause/Still Yes
TV/VCR(VCR) Yes
FF Yes
Rew Yes
Skip+ Yes
Skip- Yes
Rec Yes
Play Yes
Stop Yes
TV Yes
VCR Yes
Cable Yes
DVD Yes
CODE No
DVD CLEAR Yes
TOP MENU Yes
DVD Enter Yes
A3-3

GENERAL SPECIFICATIONS
G-11 Features Auto Degauss Yes
Auto Shut Off Yes
Canal+ No
Cable Yes
Anti-theft No
Rental No
Memory(Last CH) Yes
Memory(Last Volume) Yes
V-Chip No
Type
BBE Yes
Auto Search No
CH Allocation No
SAP Yes
Just Clock Function No
CH Label Yes
VM Circuit Yes
Full OSD No
Premiere No
Comb Filter Yes
3 Lines
Auto CH Memory Yes
Hotel Lock No
Closed Caption Yes
Stable Sound Yes
FBT Leak Test Protect Yes
CH Lock Yes
Video Lock Yes
Game Timer (Max Time:120 Min) Yes
Energy Star No
Favorite CH Yes
Surround Yes
Power On Memory Yes
16:9 Mode Yes
G-12 Accessories Owner's Manual Language English / French
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 Station List No
Important Safety Instruction No
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet No
Battery Yes
UM size x pcs UM-4 x 2
OEM Brand No
AC Cord No
AV Cord (2Pin-1Pin) No
Registration Card (NDL Card) No
PTB Sheet No
ESP Card No
300 ohm to 75 ohm Antenna Adapter No
A3-4

GENERAL SPECIFICATIONS
G-13 Interface Switch Front Power Yes
System Select No
Main Power SW No
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 Yes(RED)
Stand-by No
On Timer No
Terminals Front Video Input = VIDEO3 RCA
Audio Input = VIDEO3 RCA x 2
Other Terminal Head Phone
Rear Video Input(Rear1) = VIDEO1 RCA
Video Input(Rear2) = VIDEO2 RCA
Audio Input(Rear1) = VIDEO1 RCA x 2
Audio Input(Rear2) = VIDEO2 RCA x 2
Video Output RCA
Audio Output RCA x 2
Euro Scart No
Color Stream RCA x 3
S Input Yes
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input F Type
AC Outlet No
G-14 Set Size Approx. W x D x H (mm) 740 x 495 x 574.5
G-15 Weight Net (Approx.) 40.0 kg ( 88.2lbs)
Gross (Approx.) 46.5 kg ( 102.5lbs)
G-16 Carton Master Carton No
Content ---- Sets
Material -- /--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin No
Gift Box Material Double/Brown
Dimensions W x D x H(mm) 850 x 620 x 665
Design As per Buyer's
Description of Origin Yes
Drop Test Natural Dropping At 1 Corner / 2
Edges / 4 Surfaces
Height (cm) 40 (ORION SPEC:25)
Container Stuffing 156 Sets/40' container
G-17 Cabinet Material Cabinet Cabinet Front PS 94V0 DECABROM
Cabinet Rear PS 94V0 DECABROM
PCB Non-Halogen Demand No
Eyelet Demand Yes
G-18 Environment Environmental standard requirement (by buyer) Green procurement of TOSHIBA
Pb-free Phase3(Phase3A)
A3-5

B1-1
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.)
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 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 rotate or move the IC back and forth , until IC
can move back and forth easily after desoldering the
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, always be 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

SERVICE MODE LIST
This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the Service Mode, press both set key and remote control key for more than 2 seconds.
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 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.
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)
ADDRESS DATA
INIT 00 50
CRT ON 0010
C-1
WHEN REPLACING EEPROM (MEMORY) IC
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.
Table 1
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
The unit will now have the correct DATA for the new MEMORY IC.
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.
ADDRESS is now selected and should "blink". Using the VOL. UP/DOWN button on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
Press ENTER to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
Pressing ENTER 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.
NOTE: No need to set data for after position INI 1F due to the adjustment value.
50 E8 0A 44 5E B3 24 B7 AC
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
INI
70 00 00 03 00 06 60 3F 0F10 00 0D E2 A8 21 42 00
00 0B 04 80 80 80 59
3C
Set Key Remocon Key Operations
VOL. (-) MIN 0Releasing of V-CHIP PASSWORD and LOCK PASSWORD.
VOL. (-) MIN 1
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 9 Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
Initialization of factory data.
NOTE: Do not use this for normal servicing.
If you set factory initialization, the memories are reset such as the channel setting,
and the POWER ON total hours.

ELECTRICAL ADJUSTMENTS
D-1
FUNCTION
CONTRAST MAX
CONTRAST CENT
CONTRAST MIN
COLOR MAX
COLOR CENTER
COLOR MIN
TINT
SHARPNESS
CB DL
CR DL
CB PED
CR PED
PARABOLA
CORNER
TRAPWZIUM
LEVEL
SEPARATION1
SEPARATION2
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 with a heat sink,
apply silicon grease on the contact section of the heat
sink. Befor applying new silicon grease, remove all the
old silicon grease. (Old grease may cause damages to
the IC and Transistor.)
Prepare the following measurement tools for electrical
adjustments.
1. Oscilloscope
2. Digital Voltmeter
3. Multi-sound Generator
4. Pattern Generator
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.
Fig. 1-1
TV
00 OSD 28
2.
3.
Use the Channel UP/DOWN button or Channel button
(0-9) 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.
FUNCTION
OSD H
CUT OFF
H. VCO
H. PHASE
AFC GAIN
V. SHIFT
H. SIZE
V. SIZE
V. LINERITY
VS CORRECTION
R DRIVE
B DRIVE
R BIAS
G BIAS
B BIAS
BRIGHT MAX
BRIGHT CENT
BRIGHT MIN
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
Fig. 1-2
NO.
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
2. BASIC ADJUSTMENTS
2-1: CONSTANT VOLTAGE
1.
2.
3.
Place the set in AV MODE without signal.
Connect the digital voltmeter to the TP003.
Adjust the VR502 until the digital voltmeter is 135 ±0.5V.
•
•
•
•
2-2: CUT OFF
1.
2.
3.
4.
5.
Place the set in Aging Test for more than 15 minutes.
Place the set in AV MODE without signal.
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 (01) on the remote control to
select “CUT OFF”.
Adjust the Screen Volume until a dim raster is obtained.
2-3: WHITE BALANCE, WHITE BALANCE CS
NOTE: Adjust after performing CUT OFF adjustment.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Place the set in Aging Test for more than 15 minutes.
Receive the gray scale pattern from the Pattern Generator
with Brust On.
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 “R. BIAS”.
Press the CH. UP/DOWN button on the remote control to
select the “R. BIAS”, “G. BIAS”, “B. BIAS”, “B. DRIVE” or
“R. DRIVE”.
Adjust the VOL. UP/DOWN button on the remote control
to whiten the R. BIAS, G. BIAS, B. BIAS, B. DRIVE and
R. DRIVE at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is achieved.
Press the TV/VIDEO button on the remote control to set
to the CS mode.
Receive the gray scale pattern from the Pattern Generat
or with Brust On.
If the picture is too much green.Activate the adjustment
mode display of Fig. 1-1 and press the channel button
(28) on the remote control to select “CB PED”.
Adjust the VOL. UP/DOWN button on the remote control
to select the step up.
If the picture is too much red.Activate the adjustment
mode display of Fig. 1-1 and press the channel button
(29) on the remote control to select “CR PED”.
Adjust the VOL. UP/DOWN button on the remote control
to select the step down.

ELECTRICAL ADJUSTMENTS
D-2
2-4: COLOR CENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Connect the oscilloscope to TP804.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) 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 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 125 ±5% of the
white level. (Refer to Fig. 2-1)
Receive the video color bar pattern. (Audio Video Input)
Set to the AV mode. Then perform the above
adjustments 2~6.
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
2~4.
Press the VOL. UP/DOWN button on the remote control
until the color step No. becomes "70".
Fig. 2-1
125%
white 100%
2-8: VERTICAL SIZE
1.
2.
3.
4.
Receive the monoscope pattern.
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 (07) on the remote control to
select “V. SIZE”.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes 9 ±3%.
2-6: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-5: TINT
1.
2.
3.
4.
5.
6.
7.
8.
9.
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Connect the oscilloscope to TP806.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select "TINT".
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes as straight line.
(Refer to Fig. 2-2)
Receive the video color bar pattern. (Audio Video Input)
Set to the AV mode. Then perform the above adjustments
2~5.
Press the TV/VIDEO button on the remote control to set to
the CS mode. Then perform the above adjustments 2~4.
Press the VOL. UP/DOWN button on the remote control
until the tint step No. becomes "55".
Fig. 2-2
“A”
2-7: VERTICAL POSITION
1.
2.
3.
Receive the monoscope pattern.
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.
(Refer to Fig. 2-3)
Fig. 2-3
Shadow mask
Notch
horizontal line
;;
;;
;;
;;
;;
;;
;;
;

ELECTRICAL ADJUSTMENTS
D-3
2-12: OSD POSITION
1.
2. Activate the adjustment mode display of Fig. 1-1. Press the VOL. UP/DOWN button on the remote
control until the difference of A and B becomes
minimum. (Refer to Fig. 2-4)
B
A
TV
00 OSD 28
Fig. 2-4
2-9: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-8.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Position and Vertical Size adjustments.
Receive the monoscope pattern.
Using the remote control, set the brightness, 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 “V. LINEARITY”.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes minimum.
1.
2.
3.
4.
2-10: HORIZONTAL POSITION
1.
2.
3.
4.
Receive the monoscope pattern.
Using the remote control, set the brightness, 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 "H.PHASE".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes minimum.
Receive the monoscope pattern.
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 (06) on the remote control to
select “H. SIZE”.
Press the VOL. UP/DOWN button on the remote control
adjust the H.SIZE becomes 10~12%.
2-11: HORIZONTAL SIZE
1.
2.
3.
4. 2-15: PARABOLA/CORNER
1.
2.
3.
4.
5.
6.
Receive the cross hatch signal 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 (30) on the remote control to
select “PARABOLA”.
Press the VOL. UP/DOWN button on the remote control
until the right and left vertical lines are straight.
In the case the right and left vertical lines are not straigh,
Please Activate the adjustment mode display of Fig. 1-1
and press the channel button (31) on the remote control
to select “CORNER”.
Press the VOL. UP/DOWN button on the remote control
until the right and left vertical lines are straight.
2-16: TRAPEZIUM
1.
2.
3.
4.
Receive the cross hatch signal 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 (32) on the remote control to
select “TRAPEZIUM”.
Press the VOL. UP/DOWN button on the remote control
until the both vertical lines of the screen become paralled.
2-14: CONTRAST MAX
1.
2.
3.
4.
5.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (18) on the remote control to
select “CONT. MAX”.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes “100”.
Receive a broadcast and check if the picture is normal.
Press the TV/VIDEO button on the remote control to set
to theAV mode. Then perform the above adjustments 1~3.
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
1~3.
2-13: BRIGHT CENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
Receive the monoscope pattern. (RF Input)
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 (16) on the remote control to
select "BRI CENT".
Press the VOL. UP/DOWN button on the remote control
until the white 10% is starting to be visible.
Receive the monoscope pattern. (Audio Video Input)
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~4.
Press the TV/VIDEO button on the remote control to set
to the CS mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "BRI CENT".
Press the VOL. UP/DOWN button on the remote control
until the brightness step No. becomes "90".

ELECTRICAL ADJUSTMENTS
D-4
2-17: SEPARATION 1, 2
Please do the method (1) or method (2) adjustment.
Method (1)
1.
2.
3.
4.
5.
Set the multi-sound signal generator for each different
L-ch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz)
and receive the RF.
Connect the oscilloscope to the Audio Out Jack.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select “SEP 1”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
Press the CH UP button once the set to “SEP 2” mode.
Then perform the above adjustment 4.
Method (2)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Set the multi-sound signal generator L-ch=1KHz, R-ch
=Non input and receive the RF.
Connect the oscilloscope to the Audio Out Jack (R-ch).
Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select “SEP 1”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the R-ch output becomes minimum.
Set the multi-sound signal generator L-ch=Non input,
R-ch=1KHz and receive the RF.
Connect the oscilloscope to the Audio Out Jack (L-ch).
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select “SEP 2”.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the L-ch output becomes minimum.
The output difference of the between with Filter and
without Filter should be more than 25db for both L and R.
2-18: LEVEL
1.
2.
3.
4.
Receive the monoscope pattern.
Connect the AC voltmeter to pin 6 of CP101.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (33) on the remote control to
select “LEVEL”.
Press the VOL. UP/DOWN button on the remote control
until the AC voltmeter is 75 ±2mV.
Please check if the fixed values of the each adjustment
items are set correctly referring below.
2-19: Confirmation of Fixed Value (Step No.)
FUNCTION
H.VCO
AFC GAIN
V.SHIFT
VS CORRECTION
BRI.MAX
BRI.MIN
CONT.CENT
CONT.MIN
COL.MAX
COL.MIN
SHARPNESS
CB DL
CR DL
RF
03
06
02
36
160
30
64
05
90
00
40
00
00
CS
03
06
02
36
160
30
64
05
90
00
40
00
00
AV
03
06
02
36
160
30
64
05
90
00
40
00
00
NO.
02
04
05
09
15
17
19
20
21
23
25
26
27

ELECTRICAL ADJUSTMENTS
D-5
3. PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
1.
2.
3.
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.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
1.
2.
3.
4.
5.
6.
7.
8.
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.
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 color.
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
3-3: STATIC CONVERGENCE
NOTE
Adjust after performing adjustments in section 3-2.
1.
2.
3.
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.
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
BR
G
B
R G B
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
Fig. 3-2-a
WEDGE WEDGE
WEDGE
WEDGE POSITION
Fig. 3-2-b

ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
D-6
W003
CP502
TP003
VR502
CP101
CP801A
J704 J702
J1001J705 J706 J707
CP1001
OS101
CP851A
VR401
J701
J703J708
SPEAKER
CRT
FB401
TU001
CP501
AC IN
CD501
CRT
CP852B
CP803
CP804
TP806 TP804
R808 R804
CP852
CP851B CP802B CP801B
J801
CRT CRT PCB
VM COIL PCB
MAIN PCB
CD803
CD852
CD802
CD851
CD1001
CP401
POWER PCB
CP802A
CD801

AUDIO SW(R) IC
IC701 MM1501XNRE
MICON
IC101 OEC7090B
CHROMA IC
IC601 M61283FP R70T
VIDEO SW(Y) IC
IC1502 MM1501XNRE
VIDEO SW(C) IC
IC1503 MM1501XNRE
SOUND DECORDER IC
IC902 AN5829S-E1V
FRONT-AUDIO.R
J707 FRONT-AUDIO.L
J706
AUDIO SW(L) IC
IC702 MM1501XNRE
FRONT -VIDEO
J705
LINE1(REAR)
J701
S-JACK
J702
A/V OUT
J708
3
2
7
5
1
HEADPHONE_JACK
J1001
SPEAKER
SP1001
BLOCK DIAGRAM
VIDEO LINE OUT
60
Y IN(Y/C)
51
42
49
53
38
48
CVBS1
C IN(Y/C)
CVBS2
CVBS3
CVBS4
Y IN(YUV)
44 U IN(YUN) X101
8MHz
D101
1
OS101
23
R IN
VOL UP
46
VOL DOWN
CH DOWN
B IN 21
35 GREEN G
36 BLUE B
J801
6
11
8
F
7
DY
G IN 22
34 RED R
40 V IN(YUV)
POWER
8
63
V OUT
H OUT
FAST BLK 24
V-OUT IC
IC401 LA78041
CRT
V801
15
16
14
B OUT
G OUT
R OUT
33 BLANK
Q803, Q812
BLUE AMP Q802, Q811
GREEN AMP
Q801, Q810
RED AMP
FB401
Q405
Q402 H.OUT
H.DRIVER
5
1
16
18
3
COMB FILTER IC
IC1501 LA76605M-TLM
Y OUT
C OUT
Y IN
4
2
Vin1
Vin2
V.OUT
2
6
4
6Vin1
Vin2
V.OUT
3
4
6
LINE2(REAR)
J703
6
2
5
YUV_IN(REAR)
J704
3
2
2
24
14
23
3
6
4 2
Vin1
Vin2 V.OUT
2
3
2
3
2
6
4
2
Vin1
Vin2
V.OUT
2
3
30 19
TONE IC
IC302
AN5891SA-E1V
16 20
17
BBE IC
IC301
NJM2150AM (TE1)
14 2
57
SOUND AMP
IC1001
AN17808B
12
21
22
Q901
BUFFER
Q902
BUFFER
TU001
17
13
10
11
27 SCL
26 SDA
6
5MEMORY IC
IC199
BR24L16FJ-WE2
SCL
SDA
30 SCL1
31 SDA1
10
ON_TIMER
6
KEY1
7
KEY2
9
REMOCON
19
X.IN
20
X.OUT
CH UP
X602
3.97545MHz
34
XTAL 3.58
58
DELAYDE Y OUT
Q610
SVM
Q613
SVM OFF
Q852, Q583
AMP
Q854
BUFFER
18
19
VM COIL
Q855 ~ Q859
4
2
6
Q603, Q614, Q605
AMP
BUFFER
1
F
SHV
E-1 E-2