Toshiba 27A33 User manual

SERVICE MANUAL
COLOR TELEVISION
27A33
FILE NO. 050-200313
DOCUMENT CREATED IN JAPAN, Mar., 2003

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

TABLE OF CONTENTS
SERVICING NOTICES ON CHECKING.....................................................................................
HOW TO ORDER PARTS ..........................................................................................................
IMPORTANT ...............................................................................................................................
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................................................................................................................................
SCHEMATIC DIAGRAMS
MICON .....................................................................................................................................
CHROMA .................................................................................................................................
DEFLECTION ..........................................................................................................................
POWER ...................................................................................................................................
SOUND ....................................................................................................................................
TUNER/STEREO.....................................................................................................................
AV ............................................................................................................................................
CRT..........................................................................................................................................
COMB/FILTER.........................................................................................................................
WAVEFORMS .............................................................................................................................
MECHANICAL EXPLODED VIEWS...........................................................................................
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
C1-1
C1-1
C1-1
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
G-13, G-14
G-15, G-16
G-17, G-18
H-1, H-2
I-1
J1-1
J2-1~J2-4
A2-1

GENERAL SPECIFICATIONS
G-1 TV CRT CRT Size / Visual Size 27 inch / 676mmV
System CRT Type Normal
Deflection 108 degree
Magnetic Field BV/BH +0.45G/0.18G
Color System NTSC
Speaker 2Speaker
Position Front
Size 2.0 x 3.5 Inch
Impedance 8 ohm
Sound Output MAX 2.5 + 2.5 W
10%(Typical) 2.0 + 2.0 W
NTSC3.58+4.43 /PAL60Hz No
G-2 Tuning Broadcasting System US System M
System Tuner and System 1Tuner
Receive CH Destination USA(W/ CATV)
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 125 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
G-4 Regulation Safety UL
Radiation FCC
X-Radiation DHHS
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
Audio Yes
Bass Yes
Treble Yes
Balance Yes
BBE On/Off No
Stable Sound On/Off Yes
Surround On/Off Yes
Set Up Yes
TV/CABLE(CATV) Yes
CH Program Yes
Add/Erase Yes
Option Yes
Language Yes
V-chip Yes
CH Label Yes
Favorite CH Yes
Lock Yes
On/Off Timer Yes
Color Stream DVD/DTV Yes
Control Level Yes
Volume Yes
Brightness Yes
Contrast Yes
Color Yes
Tint (NTSC Only) 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 Yes
16: 9 No
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 / Clock) 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-GQ
Control Glow in Dark Remocon Yes
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 29 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 Yes
CH Up Yes
CH Down Yes
Volume Up Yes
Volume Down Yes
Cap/Text(TV/Caption/Text) Yes
1/2(CH1/CH2) Yes
TV/Video(TV/AV) Yes
CH RTN(Quick View) Yes
Sleep Yes
RECall(Call) Yes
Reset Yes
Menu/Enter Yes
Mute Yes
Exit Yes
MTS(Audio Select) Yes
Fav.Up Yes
Fav.Down Yes
16: 9 No
Multi Brand Keys CH Up(VCR) No
CH Down(VCR) No
Pause/Still No
TV/VCR(VCR) No
FF No
Rew No
Rec No
Play No
Stop No
TV No
VCR No
Cable No
DVD No
CODE No
DVD MENU < No
DVD MENU > No
DVD CLEAR No
TOP MENU No
DVD MENU No
A3-3

GENERAL SPECIFICATIONS
G-11 Features Auto Degauss Yes
Auto Shut Off Yes
Canal+ No
CATV Yes
Anti-theft No
Rental No
Memory(Last CH) Yes
Memory(Last Volume) Yes
V-Chip Yes
Type USA,Toshiba Type
BBE No
Auto Search No
CH Allocation No
SAP Yes
Just Clock Function No
CH Label Yes
VM Circuit No
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 Yes
Favorite CH Yes
Surround Yes
16:9 Mode No
2 Tuner P-in-P No
G-12 Accessories Owner's Manual Language English
W/ Warranty Yes
Remote Control Unit Yes
Rod Antenna No
Poles
Terminal
Loop Antenna No
Terminal
U/V Mixer No
DC Car Cord (Center+) No
Guarantee Card No
Warning Sheet No
Circuit Diagram No
Antenna Change Plug No
Service Facility List No
Important Safety Instruction No
Dew/AHC Caution Sheet No
AC Plug Adapter No
Quick Set-up Sheet No
Battery Yes
UM size x pcs UM4 size x 2
OEM Brand No
AC Cord No
AV Cord (2Pin-1Pin) No
Registration Card (NDL Card) Yes
ESP Card Yes
PTB Sheet 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 RCA
Audio Input RCA x 2
Other Terminal No
Rear Video Input(Rear1) RCA
Video Input(Rear2) RCA
Audio Input(Rear1) RCA x 2
Audio Input(Rear2) RCA x 2
Video Output RCA
Audio Output RCA x 2
S- Input Yes
Euro Scart No
Color Stream RCA x 3
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) 650 x 500.5 x 571.5
G-15 Weight Net (Approx.) 36.5kg ( 80.5 lbs)
Gross (Approx.) 40.5Kg ( 89.3 lbs)
G-16 Carton Master Carton No
Content ---- Sets
Material -- /--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin No
Gift Box Yes
Material Double/Brown
Dimensions W x D x H(mm) 771 x 580 x 665
Design As per Buyer's
Description of Origin Yes
Drop Test Natural Dropping At 1
C
orner
/
3 Edges
/
6
Su
rf
aces
Height (cm) 31
Container Stuffing 165 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
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 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

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 1 second.
Set Key Remocon Key Operations
VOL. (-) MIN 0Releasing of V-CHIP PASSWORD.
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 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
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 1 second.
After the confirmation of using hours, turn off the power.
ADDRESS DATA
INIT 00 50
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)
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 1 second.
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 1 second.
After the finishing of the initializing of shipping, the unit will turn off automatically.
NOTE: No need setting for after INI 1F due to the adjustment value.
90 E8 02 65 5E B3 24 37 AC
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
INI
50 00 00 00 00 00 99 3F 0F10 00 0D C6 A8 21 43 00
00 AA 04 40 40 40 7F
39

ELECTRICAL ADJUSTMENTS
D-1
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.)
2. BASIC ADJUSTMENTS
Prepare the following measurement tools for electrical
adjustments.
2-1: CONSTANT VOLTAGE
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 5 minutes.
Using the remote control, set the brightness and contrast
to normal position.
Set condition is AV MODE without signal.
Connect the digital voltmeter to the TP003.
Adjust the VR502 until the digital voltmeter is 123 ±0.5V.
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 1 second to
appear the adjustment mode on the screen as shown in
Fig. 1-1.
Fig. 1-1
3.
4.
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.
TV
00 OSD 35
2-4: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
2-3: 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 10 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 (12) on the remote control to
select “R CUT OFF”.
Press the CH. UP/DOWN button on the remote control to
select the “R CUT OFF”, “G CUT OFF”, “B CUT OFF”, “B.
DRIVE” or “R. DRIVE”.
Adjust the VOL. UP/DOWN button on the remote control
to whiten the R CUT OFF, G CUT OFF, B CUT OFF, B.
DRIVE, and R. DRIVE at each step tone sections equally.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-2: CUT OFF
1.
2.
3.
4.
5.
Place the set with Aging Test for more than 15 minutes.
Set condition is 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.
FUNCTION
CONTRAST CENT
CONTRAST MIN
COLOR MAX
COLOR CENTER
COLOR MIN
TINT
SHARPNESS
Cb DELAY FINE
Cr DELAY FINE
Cb PEDESTAL ADJ
Cr PEDESTAL ADJ
E/W PARABOLA
E/W CORNER
E/W TRAPEZIUM
LEVEL
SEPARATION1
SEPARATION2
READ DATA
FUNCTION
OSD H
CUT OFF
H. VCO
H. PHASE
AFC GAIN
V. SHIFT
H. SIZE
V. SIZE
V. LINEARITY
VS CORRECTION
DRIVE R
DRIVE B
R CUT OFF
G CUT OFF
B CUT OFF
BRIGHT MAX
BRIGHT CENT
BRIGHT MIN
CONTRAST MAX
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18 Fig. 1-2
NO.
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
88
2-5: HORIZONTAL PHASE
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 (03) on the remote control to
select “H. PHAS”.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes minimum.

ELECTRICAL ADJUSTMENTS
D-2
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 ±2%.
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.
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 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 “V. LIN”.
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.
2-6: HORIZONTAL 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 (06) on the remote control to
select “H. SIZE”.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes 11 ±1%. 2-12: LEVEL
1.
2.
3.
4.
Receive the VHF HIGH (70dB).
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.
2-10: TRAPEZIUM
1.
2.
3.
4.
Receive the crosshatch 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 parallel.
2-11: PARABOLA
1.
2.
3.
4.
Receive the crosshatch 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.
2-14: 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 0% 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
to set the same step numbers as the AV mode.
2-13: OSD HORIZONTAL
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. 2-1)
BA
TV
00 OSD 35
Fig. 2-1

ELECTRICAL ADJUSTMENTS
D-3
2-17: SEPARATION 1, 2
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 (1)
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.
Method (2)
Please do the method (1) or method (2) adjustment.
2-16: CONTRAST MAX MANUAL
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 “110”.
Receive a broadcast and check if the picture is normal.
Press the TV/VIDEO button on the remote control to set
to the AV 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.
2-15: TINT/COLOR CENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Receive the color bar pattern.
Connect the oscilloscope to TP024.
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)
Connect the oscilloscope to TP022.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "COL.CENT".
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 120 ±10% of the white
level. (Refer to Fig. 2-3)
Receive the color bar pattern. (Audio Video Input)
Press the TV/VIDEO button on the remote control to set to
the AV mode. Then perform the above adjustments 2~7.
Press the TV/VIDEO button on the remote control to set to
the CS mode. Then perform the above adjustments 2~7.
Fig. 2-2
"A"
Fig. 2-3
white 100% red 120%
2-18: Confirmation of Fixed Value (Step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
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
CB PED
CR PED
CORNER
NO.
02
04
05
09
15
17
19
20
21
23
25
26
27
28
29
31
RF
03
04
02
38
140
70
64
20
80
00
40
00
00
08
08
35
CS
03
04
02
38
140
70
64
20
80
00
40
00
00
08
08
35
AV
03
04
02
38
140
70
64
20
80
00
40
00
00
08
08
35

ELECTRICAL ADJUSTMENTS
D-4
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-5
CP803 CP801B
CP802B
CD802
CP806
R803
R805
TP024
TP022
J801
W003
TP003
VR502
CP101
CP801A
FB401
J705 J706 J707
CP802A
TU001
VR401
CD801
CRT
CRT
CP401
CP501
CD501
AC IN
CRT
L503
CP502
CP1001
SPEAKER
CRT PCB
MAIN PCB

TU001
MICON
IC101 OEC7090A
CHROMA IC
IC601 M61283FP
SOUND DECORDER IC
IC902
AN5829S
CRT
V801
V.OUTPUT IC
IC401
LA78041
TONE CONTROL IC
IC302
AN5891SA-E1V
COMB FILTER IC
IC1501
LA76600M-TLM
17
30 SCL1
27 26
18
16 19
22
16
817 16 15 14 55
63
6
8
6
11
1
5
DY
7F10
18
17 SCL
SDA
40
YUV IN
H. OUT
Q402
Q405
BLOCK DIAGRAM
46
SOUND AMP IC
IC1001
AN5276
SPEAKER
SP1001
25
L
12
R
7
11
SDA1
31 AFT
5S_IN
10 13 12
11
19 14
44 4853
VIDEO 3
11
21
18
3
S INPUT
330
24
23
3
2L
R
L
R
A/V OUT
AUDIO IN3
AUDIO IN 1/2
RL
FBT
FB401
SOUND+B
+B
+180V
+25V
10
15
5
T501
6
3
HV
1
79
F10
S
SWITCHING
Q502
IC504
LTV-817M-VB
FEED BACK
S INPUT
3
MEMORY IC
IC199
S-24C16AFJA-TB-01
SDA
5 6
SCL
E-1 E-2
SCL SDA
V OUT
FBP IN
H OUT
ACL
B OUT
G OUT
R OUT
FSC OUT
CVBS1
CVBS4
Y IN
U IN
V IN

CP806_1
RISK OF FIRE
- REPLACE AS MARKED .
Q409
HS401
R455
CP507
Q514
D524
R543_1
D507
R544
R452
R545
CP508
C503
C502
Q410
Q402
D411
W004
W007
W003
W006
W801 B501
T501
FH502 F501 FH501
CP501
CP502
D502
D503
D501
R541
R500
D523
RY501
C506_1
R520
R540
R501
L501
C505_1
D516
R524
C403
C504
D505
D520
Q504
B504
C527
C520
C501
D511
D406
W002
W010
W018
C517
R430
C408
R429
R433
R413
CP401
R427
TP003
R443
R437
R441
R414
R428
W020
IC401
R432
R438
D409
D408
R439
C426
D404
D415
D410
D403
W019
R527
Q512
R506 D528
Q507
R554
R553
VR502
CP101
D402
C442
HS402
C425
TP004
CP801A
C421
FB401_1
D405
C412
W017
C418
L403
C420
L402
W011
W009
W071
R406
R421
T401
IC504
W001
C409
C430
C407 C406
R502
D506
Q502 R542
C509
HS501
W005
D414
R547
D525
R517_1
D504
R434
Q503
R507
Q505
R536
R535
R505
W806
D517
D513
R410_1
Q408
R459_2
R456
J704
J702
J705J706
J707
W179
W177
W178
CP1001
R537
C904
C905
C907
C916
W119
C910
C914
L901
C903
C902
C901
W092
R905
R904
R901
R902
W125
W174
W175
L301
C302
C306
R301
C305
C308
C314
C316
C318
R302
C333
C304
SW105
R120
OS101
C108
D109
SW102
R515
R118
W053
W822
X101_1
W120
C122
C110
R139
R140
SW103 SW104 SW101
R102
W128
W129
R119
W118
W121
D105
C109
W126
D104
W055
C113
D106
W049
R133
W052
W056
W093 W116
C317
C319
C321
W181
W180
W832
Q405
W160
D608
W028
W176
R002
R001
W027
W101
W109
W098
C507
C535
R539
W831
W161
CP802A
W023
W041
W099
W114
W102
W104
W106
W112
R124
W094
W111
W044
TU001
D001
D709
W062
W133
C701 C702
C728
C711 C707
C708
C1011
C1004
C1007
C1009
C1008
IC1001
HS1001 R1009
W803
W136
W137
W130
C1005
W138
W072
W134
W060
C1518
C1510
L1505
L1503
L1502
L1508 C1520
C1501
C1502
L1511
C1528
L1510
C1525
W156
W858 W166
W077
W076
C001_1
L1501
C1532
W146
W145
C642
C605
D602
D601
R603
D603
W162
W086
C638
X602
C630
C627
C622
Q607
W075
W058
W070
W073
W108 W107
W030
C621
W061
W069
C618
W067
W090
C611
Q606
Q604
Q602
C610
R649
C603
W059
R616
W151 W150
W147
W144
W173
W141
Q601
Q611
C602
R601
C606
W172
W082
R132
W029
W103
W096
W113
W805
W168
L1512
R626 R623
W097
W036
W167
W170
W139
C615
Q806
Q804
Q805
C802
R806
C801
D812
D810
D811
J801_1
Q802
Q801
Q803
D802 D801
D803
CP803
R807
R803
CD801B
R802
W802
R804 W015 R805
W016
CP802B
C413_1
D509
R508
TP006
TP005
D604
D514
W043
W132
C1003
W074
C919
C1001
C1002
C710
D407
C114
W021
VR401
R422
R418
W143
W088
W089
W068
W054
R146
D510
C733
D701
D703
D702
W079
B405
C1535
W148
W149
W154
R602
W833
W834
C609_1
W155
R510
W013
C608
R648
W140
R303
R304
W163
W164
W165
D706
W117
W095
W080
W022
W048
D705
D704
W091
W123
R130
W157
C139
W033
J701 J703 J708
W035
W032
W037
W038
W040
W064
W063
W135
R546
R702
C645
W081
W083 W085
R701
C705
C629
W045
W046
D607
D606
D605
W169
C1530_1
W026
W084
W131
W835
TH501_2
C402
C415
C417
C508_1
C512
C513_1
C519_1
C524
D512
R426
R436
R824
W012
W065
W078
W057
W183
W182
R457
C401
C427
C521
W184
W185
W110
W042
W024
W039
W186
W811
W819
W820
W817
W829
W830
W848
W825
W853
W812
R710
C422
C523
C639
C647
C646
W828
W836
W827
Q508
R512
Q509
C550
D508
W823
S801X
S801Y
W100
W115
D416 D417
R405
C804
R538
R416_1
CD801A
CD802A
CD802B
R137
R656
C539
D113
D610
D611
PRINTED CIRCUIT BOARDS
MAIN/CRT (INSERTED PARTS)
SOLDER SIDE
F-1 F-2

17
33
49
1
C541
R453
R525
C511
R448
R449
R417
R415
C405
R532 R533
C554
R407
R513
R458
R404
R745
C741
C742
R746
C720
C719
R724
IC902
C908
C912
C915
C918
R907
Q902
R906
Q901
R903
C917
C913
C911
R912
IC302
C303
C312
C301
R314
R103 R106
R138
R135
IC199_1
IC101
R112
R110
C131
R131
C117 C121
R128
R142
R129
R126
C102
C104
R113
C106
R136
C119
C111
R101
R114
Q101
R109
R125
C120
R150
Q103
R127 R141
R143
C135
R145
C309 C307
C310
C313
C322
C320
IC601
C439
R516
C002
C734 R735
R739
C736 C738 R733 R729 R726
C725
C722
R734
R727
C735
R728
C724 C727
C737
IC702
C706
R730
R736
R721
Q711
R711
R708 R725
R704
R706
R705
R1013
Q1001
R1003
R1011
R1004
R1010
C1010 C1012
Q709
R709
R006
IC1503
IC1502
C1512
C1516
R1529
R1528
R1505
Q1503
C1513
C1517
R1506
R1507
C1519
C1509
C1515
C1504
R1504
C1514
R1503
C1506
C1507
IC1501
C1503
R1502
C1521 C1508
R1508
Q1504
R1509
R1510
C1531
Q1508
R1530 C1505
Q1507
R1516
C1526
R1518
R1519
C1523
C641
R1520
C1533
R632
C136 C137 C138
C632 R618
C631
C624
C614
R610
C607
R617
C640
R628
Q603
R604
R625
R1523
R609
R629
R622
R634
R620
C612
C616
R611
R641
R635
C628
R812
R821
R820
R814
R816
R809
R813
R811
R815
C810
C811
C809
R808
R810
R801
R819
R818
R817
R612
R636
R703
C005
R1522
R401
C510_1
R1512
Q605
R607
R605
R606 R608
Q614
C315 C311
C334
R613
C635
C644
C643C637
C140
C141
C142
C143
R134
R627
Q411
R462
R461 C146
C411
C619_1
R654
C805
C416
Q712
R403
R511 R519
IC701
C128
R655
C115
PRINTED CIRCUIT BOARDS
MAIN/CRT (CHIP MOUNTED PARTS)
SOLDER SIDE
F-3 F-4