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.
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is
flowing.
3. USE THE DESIGNATED PARTS
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.
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
In the condition that an explosion-proof cathoderay 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.
6. AVOID AN X-RAY1. KEEP THE NOTICES
Safety is secured against an X-ray by considering about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage peripheral 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 cathoderay tube.
PERFORM A SAFETY CHECK AFTER
7.
SERVICING
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.
Unplug the plug from the AC outlet.
2.
Remove the antenna terminal on TV and turn
on the TV.
3.
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].
4.
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
HOW TO ORDER PARTS
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.
IMPORTANT
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.)
A1-127A45/27A45C
Page 3
ABOUT LEAD FREE SOLDER (PbF)
Distinction of PbF PCB:
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.
Recommendations
Recommended lead free solder composition is Sn-3.0Ag-0.5Cu.
A1-2
27A45/27A45C
Page 4
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 ..........................................................................
System SelectNo
Main Power SWNo
Sub PowerNo
Channel UpYes
Channel DownYes
Volume UpYes
Volume DownYes
TV/CATV SelectorNo
DegaussNo
Main Power SWNo
Stand-byNo
On TimerNo
Audio Input
Other TerminalNo
Video Input(Rear2)
Audio Input(Rear1)
Audio Input(Rear2)
Video Output
Audio Output
S- InputYes
Euro ScartNo
Color Stream
DiversityNo
Ext SpeakerNo
DC Jack 12V(Center +)No
VHF/UHF Antenna Input
AC OutletNo
Gross (Approx.)41.0Kg
Content---Material--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin
Dimensions W x D x H(mm) 850 x 575 x 665
DesignAs per Buyer's
System SelectNo
Main Power SWNo
Sub PowerNo
Channel UpYes
Channel DownYes
Volume UpYes
Volume DownYes
TV/CATV SelectorNo
DegaussNo
Main Power SWNo
Stand-byNo
On TimerNo
Audio Input
Other TerminalNo
Video Input(Rear2)
Audio Input(Rear1)
Audio Input(Rear2)
Video Output
Audio Output
S- InputYes
Euro ScartNo
Color Stream
DiversityNo
Ext SpeakerNo
DC Jack 12V(Center +)No
VHF/UHF Antenna Input
AC OutletNo
Gross (Approx.)41.0Kg
Content---Material--
Dimensions W x D x H(mm) -- x -- x --
Description of Origin
Dimensions W x D x H(mm) 850 x 575 x 665
DesignAs per Buyer's
Description of OriginYes
Height (cm) 60 (ORION SPEC:31)
Cabinet RearPS 94V0 DECABROM
Eyelet DemandYes
RCA
RCA x 2
RCA
RCA
RCA x 2
RCA x 2
RCA
RCA x 2
RCA x 3
F Type
740 x 491.5 x 571.5
( 81.6 lbs)
( 90.4 lbs)
No
Sets
/--
No
Natural Dropping At 1 Corner / 2
Ed
es / 4 Surfaces
168
Yes
Sets/40' container
No
A3-10 27A45C
Page 15
DISASSEMBLY INSTRUCTIONS
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.
GND on the CRT
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.)
Screwdriver
Alligator Clip
GND on the CRT
Flip up the sides of the Rubber Cap in the direction of the
2.
arrow and remove one side of the support.
(Refer to Fig. 1-2.)
Rubber Cap
CRT
Support
Support
CRT
Fig. 1-1
Fig. 1-2
Fig. 1-4
4. Insert one end of the Anode Support into the anode button,
then the other as shown in Fig. 1-5.
Support
CRT
5.6.Confirm that the Support is securely connected.
Put on the Rubber Cap without moving any parts.
B1-127A45/27A45C
Fig. 1-5
Page 16
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
REMOVAL
Put Masking Tape (cotton tape) around the Flat Package
1.
IC to protect other parts from any damage.
(Refer to Fig. 2-1.)
NOTE
Masking is carried out on all the parts located within 10
mm distance from IC leads.
When IC starts moving back and forth easily after
3.
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.)
NOTE
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.
Blower type IC
desoldering
machine
Masking Tape
(Cotton Tape)
Heat the IC leads using a blower type IC desoldering
2.
IC
machine. (Refer to 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.
Blower type IC
desoldering machine
Fig. 2-1
Tweezers
IC
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
5.
Shield Wire. (Refer to Fig. 2-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Fig. 2-3
Braided Shield Wire
Soldering Iron
IC
Fig. 2-2
IC pattern
Fig. 2-4
B2-127A45/27A45C
Page 17
DISASSEMBLY INSTRUCTIONS
INSTALLATION
Take care of the polarity of new IC and then install the new
1.
IC fitting on the printed circuit pattern. Then solder each
lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
Soldering Iron
Solder temporarily
Supply the solder from the upper position of IC leads
2.
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
Solder temporarily
Fig. 2-5
When bridge-soldering between terminals and/or the
4.
soldering amount are not enough, resolder using a Thin-tip
Soldering Iron. (Refer to Fig. 2-8.)
Thin-tip Soldering Iron
IC
Fig. 2-8
Finally, confirm the soldering status on four sides of the IC
5.
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.
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.
Soldering IronSolder
IC
Supply soldering
from upper position
to lower position
Fig. 2-6
Absorb the solder left on the lead using the Braided Shield
3.
Wire. (Refer to Fig. 2-7.)
NOTE
Do not absorb the solder to excess.
Soldering Iron
IC
Braided Shield Wire
Fig. 2-7
B2-227A45/27A45C
Page 18
SERVICE MODE LIST
This unit is 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
VOL. (-) MIN
VOL. (-) MIN
VOL. (-) MIN
VOL. (-) MIN
Remocon KeyOperations
0
1
6
9
Releasing of V-CHIP PASSWORD.
Initialization of factory data.
NOTE:
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".
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
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.
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.
Set the VOLUME to minimum.
2.
Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 2 seconds.
3.
After the confirmation of using hours, turn off the power.
ADDRESS DATA
INIT 00 90
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)
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.
NOTE: No need to set data after position INI 1F due to the adjustment value.
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.
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.
4.
Press ENTER to select DATA. When DATA is selected, it will "blink".
5.
Again, step through the DATA using VOL. +/- button until required DATA value has been selected.
6.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
7.
Repeat steps 3 to 6 until all data has been checked.
8.
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.
9.
Turn POWER on.
10.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
11.
After the finishing of the initializing of shipping, the unit will turn off automatically.
The unit will now have the correct DATA for the new MEMORY IC.
*1
INI
08
USACANADA
3938
C-1
27A45/27A45C
Page 19
ELECTRICAL ADJUSTMENTS
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
second to appear the adjustment mode on the screen as
shown in Fig. 1-1.
TV
00 OSD 35
Fig. 1-1
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
NO.
OSD H
00
CUT OFF
01
H. VCO
02
H. PHASE
03
AFC GAIN
04
V. SHIFT
05
H. SIZE
06
V. SIZE
07
V. LINERITY
08
VS CORRECTION
09
R DRIVE
10
B DRIVE
11
R CUT OFF
12
G CUT OFF
13
B CUT OFF
14
BRIGHT MAX
15
BRIGHT CENT
16
BRIGHT MIN
17
CONTRAST MAX
18
FUNCTION
NO.
CONTRAST CENT
19
CONTRAST MIN
20
COLOR MAX
21
COLOR CENTER
22
COLOR MIN
23
TINT
24
SHARPNESS
25
Cb DELAY FINE
26
Cr DELAY FINE
27
Cb PEDESTAL ADJ
28
Cr PEDESTAL ADJ
29
PARABOLA
30
CORNER
31
TRAPWZIUM
32
LEVEL
33
SEPARATION1
34
SEPARATION2
35
READ DATA
88
Fig. 1-2
2. BASIC ADJUSTMENTS
2-1: CONSTANT VOLTAGE
1.
Place the set in AV MODE without signal.
2.
Connect the digital voltmeter to the TP003.
3.
Adjust the VR502 until the digital voltmeter is 123 ± 0.5V.
2-2: CUT OFF
1.
Place the set in Aging Test for more than 15 minutes.
2.
Using the remote control, set the brightness and
contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select “CUT OFF”.
4.
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.
Place the set in Aging Test for more than 15 minutes.
2.
Receive the gray scale pattern from the Pattern Generator
with Brust On.
3.
Using the remote control, set the brightness and contrast
to normal position.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (12) on the remote control to
select “R. BIAS”.
5.
Press the CH. UP/DOWN button on the remote control to
select the “R. BIAS”, “G. BIAS”, “B. BIAS”, “B. DRIVE” or
“R. DRIVE”.
6.
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.
7.
Perform the above adjustments 5 and 6 until the white
color is achieved.
8.
Press the TV/VIDEO button on the remote control to set
to the CS mode.
9.
Receive the gray scale pattern from the Pattern Generator
with Brust On.
10.
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”.
11.
Adjust the VOL. UP/DOWN button on the remote control
to select the step up.
12.
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”.
13.
Adjust the VOL. UP/DOWN button on the remote control
to select the step down.
2-4: FOCUS
1.
Receive the monoscope pattern.
2.
Turn the Focus Volume fully counterclockwise once.
3.
Adjust the Focus Volume until picture is distinct.
D-1
27A45/27A45C
Page 20
ELECTRICAL ADJUSTMENTS
2-5: HORIZONTAL SIZE
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (06) on the remote control to
select “H. SIZE”.
4.
Press the VOL. UP/DOWN button on the remote control
adjust the H.SIZE becomes 10 ± 4%.
2-6: VERTICAL POSITION
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
horizontal line
Notch
Shadow mask
Fig. 2-1
2-7: VERTICAL SIZE
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (07) on the remote control to
select “V. SIZE”.
4.
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%.
2-8: VERTICAL LINEARITY
NOTE: Adjust after performing adjustments in section 2-7.
After the adjustment of Vertical Linearity, reconfirm
the Vertical Position and Vertical Size adjustments.
Receive the monoscope pattern.
1.
Using the remote control, set the brightness, contrast,
2.
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
3.
press the channel button (08) on the remote control to
select “V. LIN”.
Press the VOL. UP/DOWN button on the remote control
4.
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes minimum.
2-9: TRAPEZIUM
1.
Receive the cross hatch signal from the Pattern
Generator.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (32) on the remote control to
select “TRAPEZIUM”.
4.
Press the VOL. UP/DOWN button on the remote control
until the both vertical lines of the screen become paralled.
2-10: PARABOLA CORR
1.
Receive the cross hatch signal from the Pattern
Generator.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (30) on the remote control to
select “PARABOLA”.
4.
Press the VOL. UP/DOWN button on the remote control
until the right and left vertical lines are straight.
2-11: LEVEL
1.
Connect the AC voltmeter to pin 6 of CP101.
2.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (33) on the remote control to
select “LEVEL”.
3.
Press the VOL. UP/DOWN button on the remote control
until the AC voltmeter is 75 ± 2mV.
2-12: SEPARATION 1, 2
Please do the method (1) or method (2) adjustment.
Method (1)
1.
Set the multi-sound signal generator for each different Lch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz)
and receive the RF.
2.
Connect the oscilloscope to the Audio Out Jack.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select “SEP 1”.
4.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the audio output wave becomes a fine
sine wave.
5.
Press the CH UP button once the set to “SEP 2” mode.
Then perform the above adjustment 4.
D-2
27A45/27A45C
Page 21
ELECTRICAL ADJUSTMENTS
Method (2)
1.
Set the multi-sound signal generator L-ch=1KHz, R-ch
=Non input and receive the RF.
2.
Connect the oscilloscope to the Audio Out Jack (R-ch).
3.
Press the AUDIO SELECT button on the remote control
to set to the stereo mode.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (34) on the remote control to
select “SEP 1”.
5.
Press the VOL. UP/DOWN button on the remote control
to adjust it until the R-ch output becomes minimum.
6.
Set the multi-sound signal generator L-ch=Non input,
R-ch=1KHz and receive the RF.
7.
Connect the oscilloscope to the Audio Out Jack (L-ch).
8.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select “SEP 2”.
9.
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.
2-13: 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. 2-2)
2-15: COLOR CENT
1.
Receive the color bar pattern. (RF Input)
2.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
3.
Connect the oscilloscope to TP022.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "COLOR CENT".
5.
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.
6.
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)
7.
Receive the video color bar pattern. (Audio Video Input)
8.
Set to the AV mode. Then perform the above
adjustments 2~6.
9.
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
2~4.
10.
Press the VOL. UP/DOWN button on the remote control
until the color step No. becomes "65".
100%
120%
TV
00 OSD 35
BA
2-14: BRIGHT CENT
1.
Receive the monoscope pattern. (RF Input)
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "BRI CENT".
4.
Press the VOL. UP/DOWN button on the remote control
until the white 0% is starting to be visible.
5.
Receive the monoscope pattern. (Audio Video Input)
6.
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments
2~4.
7.
Press the TV/VIDEO button on the remote control to set
to the CS mode.
8.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (16) on the remote control to
select "BRI CENT".
9.
Press the VOL. UP/DOWN button on the remote control
until the brightness step No. becomes "65".
Fig. 2-2
Fig. 2-3
D-3
27A45/27A45C
Page 22
ELECTRICAL ADJUSTMENTS
2-16: TINT
1.
Receive the color bar pattern. (RF Input)
2.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
3.
Connect the oscilloscope to TP024.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (24) on the remote control to
select "TINT".
5.
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes as straight line.
(Refer to Fig. 2-4)
6.
Receive the video color bar pattern. (Audio Video Input)
7.
Set to the AV mode. Then perform the above adjustments
2~5.
8.
Press the TV/VIDEO button on the remote control to set to
the CS mode. Then perform the above adjustments 2~4.
9.
Press the VOL. UP/DOWN button on the remote control
until the tint step No. becomes "55".
2-19: Confirmation of Fixed Value (Step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
FUNCTION
NO.
H.VCO
02
AFC GAIN
04
V.SHIFT
05
VS.CORRECTION
09
BRI.MAX
15
BRI.MIN
17
CONT.CENT
19
CONT.MIN
20
COL.MAX
21
COL.MIN
23
SHARPNESS
25
CB DL
26
CR DL
27
CB PED
28
CR PED
29
CORNER
31
RF
03
04
02
38
140
45
64
20
90
00
40
00
00
08
08
35
AV
03
04
02
38
140
45
64
20
90
00
40
00
00
08
08
35
CS
03
04
02
38
140
45
64
20
90
00
40
00
00
08
08
35
"A"
Fig. 2-4
2-17: CONTRAST MAX
1.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (18) on the remote control to
select “CONT. MAX”.
2.
Press the VOL. UP/DOWN button on the remote
control until the contrast step No. becomes “85”.
3.
Receive a broadcast and check if the picture is normal.
4.
Press the TV/VIDEO button on the remote control to set
to the AV mode. Then perform the above adjustments 1~3.
5.
Press the TV/VIDEO button on the remote control to set
to the CS mode. Then perform the above adjustments
1~3.
2-18: HORIZONTAL PHASE
1.
Receive the center cross signal from the Pattern
Generator.
2.
Using the remote control, set the brightness and contrast to
normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (03) on the remote control to
select “H.PHASE”.
4.
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes minimum.
D-4
27A45/27A45C
Page 23
ELECTRICAL ADJUSTMENTS
3. PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
1.
Turn the unit on and let it warm up for at least 30
minutes before performing the following adjustments.
2.
Place the CRT surface facing east or west to reduce the
terrestrial magnetism.
3.
Turn ON the unit and demagnetize with a Degauss Coil.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
1.
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.
2.
Receive the green raster pattern from the color bar
generator.
3.
Slide the deflection yoke until it touches the funnel side
of the CRT.
4.
Adjust center of screen to green, with red and blue on
the sides, using the pair of purity magnets.
5.
Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
6.
Combine red and blue of the 3 color crosshatch
pattern on the center of the screen by adjusting the pair
of 4 pole magnets.
7.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
8.
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.
Receive the green raster pattern from color bar genera-
2.
tor.
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
3.
are equally wide.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole screen
4.
is green.
5.
Confirm red and blue color.
Adjust the slant of the deflection yoke while watching the
screen, then tighten the fixing screw.