Durabrand DBTV1301 Schematic
DBTV1301
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION B
Design and specifications are subject to change without notice.
DBTV1301
SER VICE MANUAL
COLOR TELEVISION RECEIVER
REVISION 2
MFR’S VERSION H
MFR’S VERSION
C
H
I
PCB010
TMX494A
TMX494B
Please file the revision with the original version.
TECC1040PG32D
TU001
NJH3022U268 A34AGT13X98(L)
V801
A34JXV70X28N45
A34AGT13X98(L)
Change of CRT
ELECTRICAL REPLACEMENTPARTS LIST
MFR'S VERSION I MFR'S VERSION H
REF. NO.
! V801 098Q1404B2 CRT W/DY A34AGT13X98(L) 098Y140497 CRT W/DY A34JXV70X28N45
! R429 R655812R7J R,FUSE 2.7 OHM 1W R655812R2J R,FUSE 2.2 OHM 1W
C804 CS0KB04K2K CC 270 PF 50V B CS0KB04L2K CC 330 PF 50V B
C805 CS0KB04K2K CC 270 PF 50V B CS0KB04L2K CC 330 PF 50V B
C806 CS0KB04K2K CC 270 PF 50V B CS0KB04L2K CC 330 PF 50V B
! CP401 069X450029 CONNECTOR PCB SIDE B05B-DVS 069D450049 CONNECTOR PCB SIDE TD-50-5P
PCB010 A3J804A010
MAIN PCB's are not interchangeable.
PART NO. DESCRIPTION PART NO. DESCRIPTION
MAIN PCB ASS'Y (VERSION I)
TMX494B
A3J804C010
MAIN PCB ASS'Y (VERSION H)
TMX494B
SPEC.NO.
O/R NO.
M3J8-04C
K193015
DBTV1301
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION B
Design and specifications are subject to change without notice.
SERVICING NOTICES ON CHECKING
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.
PUT PARTS AND WIRES IN THE
4.
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.
7.PERFORM A SAFETY CHECK AFTER
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
Earphone 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
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.
A1-1
CONTENTS
SERVICING NOTICES ON CHECKING......................................................................................................
HOW TO ORDER PARTS...........................................................................................................................
IMPORTANT................................................................................................................................................
CONTENTS.................................................................................................................................................
GENERAL SPECIFICATIONS....................................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP........................................................................................................
2. REMOVAL AND INSTALLATION OF FALT PACKAGE IC..........................................................
SERVICE MODE LIST.................................................................................................................................
CONFIRMATION OF HOURS USED..........................................................................................................
WHAN REPLACING EEPROM (MEMORY) IC...........................................................................................
ELECTRICAL ADJUSTMENTS..................................................................................................................
BLOCK DIAGRAM......................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT..........................................................................................................................................
SCHEMATIC DIAGRAMS
MICON/TUNER..................................................................................................................................
CHROMA...........................................................................................................................................
TV POWER........................................................................................................................................
DEFLECTION/CRT............................................................................................................................
SOUND/AV........................................................................................................................................
WAVEFORMS.............................................................................................................................................
MECHANICAL EXPLODED VIEW..............................................................................................................
MECHANICAL REPLACEMENT PARTS LIST..........................................................................................
ELECTRICAL REPLACEMENT PARTS LIST............................................................................................
A1-1
A1-1
A1-1
A2-1
A3-1~A3-4
B1-1
B2-1, B2-2
C-1
C-1
C-1
D-1~D-4
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
H-1, H-2
I-1
J1-1
J2-1, J2-2
A2-1
GENERAL SPECIFICATIONS
5oC
0oC
0oC
60oC
G-1 TV CRT CRT Size / Visual Size 13 inch / 335.4mmV
G-2 Tuning Broadcasting System US System M
G-3 Power Power Source AC 120V AC 60Hz
G-4 Regulation Safety UL/CSA
G-5 Temperature Operation
G-6 Operating Humidity Less then 80% RH
G-7 On Screen Menu Yes
System CRT Type Normal
Color System NTSC
Speaker 1Speaker
Sound Output MAX 1.0 W
NTSC3.58+4.43 /PAL60Hz No
System Tuner and System 1Tuner
Receive CH Destination Others
Intermediate Picture(FP) 45.75MHz
Frequency Sound(FS) 41.25MHz
Preset CH
Stereo/Dual TV Sound
Tuner Sound Muting Yes
Power Consumption at AC
Protector Power Fuse Yes
Display Menu Type Character
Picture Yes
Audio No
CH Set Up Yes
Language Yes
V-chip Yes
Control Level Yes
Stereo,Audio Output,SAP No
Video Yes
Color Stream No
Channel(TV/Cable) Yes
Deflection 90 degree
Magnetic Field BV/BH +0.45G/0.18G
Position Bottom
Size 3 Inch
Impedance 8 ohm
10%(Typical) 0.8 W
Tuning System F-Synth
Input Impedance VHF/UHF 75 ohm
CH Coverage A - I, J - W, W+1 - W+84
FP-FS 4.50MHz
DC
Stand by (at AC) 5 W at AC 120 V 60 Hz
Per Year -- kWh/Year
Radiation FCC /DOC
X-Radiation DHHS/HWC
Storage
Contrast Yes
Brightness Yes
Color Yes
Tint Yes
Sharpness Yes
Bass No
Treble No
Balance No
BBE On/Off No
Stable Sound On/Off No
TV/CATV Yes
Auto CH Memory Yes
Add/ Delete Yes
CH Label No
Favorite CH No
Color Stream DVD/DTV No
Sound Yes
Brightness Yes
Contrast Yes
Color Yes
Tint (NTSC Only) Yes
Sharpness Yes
Tuning No
Bass No
Treble No
Balance No
Back Light No
54 W at AC 120 V 60 Hz
+
~ +4
-2
~ +
2 - 69, 4A, A-5 - A-1,
No
No
A3-1
GENERAL SPECIFICATIONS
CH Label No
Sleep Timer Yes
Sound Mute 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 Tim / Off Tim) No
Wake Up Timer No
Timer Back-up (at Power Off Mode) more than -- Min Sec
G-10 Remote Unit RC-DW
Control Glow in Dark Remocon No
Format NEC
Custom Code 86-05 h
Power Source Voltage(D.C) 3V
Total Keys 27 Keys
Keys Power Yes
Multi Brand Keys CH Up(VCR) No
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
BBE No
Auto Search No
CH Allocation No
SAP No
Channel Lock No
Just Clock Function No
V-chip Rating Yes
OSD Language Setting English
UM size x pcs UM-4 x 2 pcs
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0 Yes
100 No
CH Up Yes
CH Down Yes
Volume Up Yes
Volume Down Yes
TV/Caption/Text Yes
CH1/CH2 Yes
TV/Video(TV/AV) Yes
CH RTN/CH ENT(Quick View) Yes
Sleep Yes
RE Call(Call) Yes
Reset Yes
Menu Yes
Enter Yes
Mute Yes
Exit No
MTS(Audio Select) No
Set + Yes
Set - Yes
CH Down(VCR) No
Pause/Still No
TV/VCR(VCR) No
Code No
FF No
Rew No
Rec No
Play No
Stop No
TV No
VCR No
Cable No
Type USA,ORION Type
A3-2
GENERAL SPECIFICATIONS
Game Position No
CH Label No
VM Circuit No
Full OSD No
Premiere No
Comb Filter No
Auto CH Memory Yes
Hotel Lock No
Closed Caption Yes
Stable Sound No
Energy Star No
Favorite CH No
G-12 Accessories Owner's Manual Language English /French
w/Guarantee Card
Remote Control Unit Yes
Rod Antenna
Poles
Terminal
Loop Antenna
Terminal U/V Mixer
DC Car Cord (Center+)
Guarantee Card Yes
Warning Sheet
Circuit Diagram
Antenna Change Plug
Service Facility List
Important Safeguard
Dew/AHC Caution Sheet
AC Plug Adapter
Quick Set-up Sheet
Battery
UM size x pcs
OEM Brand
AC Cord
AV Cord (2Pin-1Pin)
Registration Card
PTB Sheet
300 ohm to 75 ohm Antenna Adapter
G-13 Interface Switch Front Power Yes
System Select No
Main Power SW No
Sub Power No
Channel Up/Reset Yes
Channel Down/Enter Yes
Volume Up/Set Up Yes
Volume Down/Set Down Yes
MENU=Volume Up+Volume Down Yes
Rear AC/DC No
TV/CATV Selector No
Degauss No
Main Power SW No
Indicator Power No
Stand-by No
On Timer No
Terminals Front Video Input
Audio Input
Other Terminal
Rear Video Input(Rear1) No
Video Input(Rear2) No
Audio Input(Rear1) No
Audio Input(Rear2) No
Video Output No
Audio Output No
Euro Scart No
Color Stream No
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input
AC Outlet No
G-14 Set Size Approx. W x D x H (mm) 362 x 360 x 320.5
G-15 Weight Net (Approx.) 9.5 kg
Gross (Approx.)
G-16 Carton Master Carton
Content
Lines
RCA
RCA x 1
Ear Phone
F Type
11.0kg
----
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
( 20.9 lbs)
( 24.4lbs)
No
Sets
A3-3
GENERAL SPECIFICATIONS
Material --
Dimensions W x D x H(mm) -- x -- x --
Gift Box Yes
Drop Test
Container Stuffing
G-17 Cabinet Material Cabinet Front PS 94V0 DECABROM
Description of Origin
Material Double Full Color Carton W/Photo
Dimensions W x D x H(mm) 440 x 408 x 380
Design As per Buyer's
Description of Origin Yes
Natural Dropping At 1 Corner / 3 Edges
Height (cm) 62
866
Cabinet Rear PS 94V0 DECABROM
/--
No
/ 6 Surfaces
Sets/40' container
A3-4
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.
Fig. 1-5
B1-1
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
REMOVAL
Put the Masking Tape (cotton tape) around the Flat
1.
Package 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)
IC
Fig. 2-1
Heat the IC leads using a blower type IC desoldering
2.
machine. (Refer to 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.
Blower type IC
desoldering machine
Tweezers
IC
Fig. 2-3
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.
Braided Shield Wire
Soldering Iron
IC
Fig. 2-2
IC pattern
Fig. 2-4
B2-1
DISASSEMBLY INSTRUCTIONS
INSTALLATION
Take care of the polarity of new IC and then install the
1.
new 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
Solder temporarily
Fig. 2-5
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.)
When bridge-soldering between terminals and/or the
4.
soldering amount are not enough, resolder using a Thintip 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
5.
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.
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.
Soldering IronSolder
IC
Absorb the solder left on the lead using the Braided
3.
Supply soldering
from upper position
to lower position
Shield Wire. (Refer to Fig. 2-7.)
NOTE
Do not absorb the solder to excess.
Soldering Iron
IC
Braided Shield Wire
Fig. 2-6
Fig. 2-7
B2-2
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
VOL. (-) MIN 1
VOL. (-) MIN
0
6
Releasing of V-CHIP PASSWORD.
Initialization of the factory.
NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reser such as the clock
setting, the cheannel setting, the POWER ON total hours, and PLAY/REC
total hours.
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
VOL. (-) MIN
9
Writing of EEPROM initial data.
NOTE: Do not use this for the normal servicing.
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
CONFIRMATION OF HOURS USED
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
Set the VOLUME to minimum.
1.
Press both VOL. DOWN button on the set and Channel
2.
button (6) on the remote control for more than 1 second.
After the confirmation of using hours, turn off the power.
3.
ADDRESS DATA
INIT 00 83
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.
+2
INI +0 +1
+3 +4 +5 +6
+8 +A
+7
+9
+B +C
+D +E +F
00
09 B3
24 19 01 00 4408 20 98 02
05
00
D5 FF
A5
Table 1
1.
Enter DATA SET mode by setting VOLUME to minimum.
2.
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.
3.
ADDRESS is now selected and should "blink". Using the SET + or - keys 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 SET + or - 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.
The unit will now have the correct DATA for the new MEMORY IC.
C-1
ELECTRICAL ADJUSTMENTS
1.
BEFORE MAKING ELECTRICAL
ADJUSTMENTS
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.
Inferior silicon grease can damage IC's and transistors. When
•
When you exchange IC and Transistor for a heat sink,
apply the silicon grease (YG6260M) on the contract
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.)
Prepare the following measurement tools for electrical
adjustments.
1. Synchro Scope
2. Digital Voltmeter
On-Screen Display Adjustment
In the condition of NO indication on the screen.
1.
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.
TV
00 OSD 15
Fig. 1-1
Use the Channel UP/DOWN button or Channel button
2.
(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
3.
the adjustments.
2. BASIC ADJUSTMENTS
2-1: RF AGC DELAY
Place the set with Aging Test for more than 15 minutes.
1.
2.
Receive an 63dB monoscope pattern.
3.
Connect the digital voltmeter to W043.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF.AGC".
5.
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 2.5V ± 0.05V.
2-2: CUT OFF
1.
Adjust the unit to the following settings.
R.DRIVE=10, B.DRIVE=10, R.BIAS=64, G.BIAS=64,
B.BIAS=64, BRIGHTNESS=120, CONTRAST=40.
2.
Place the set with Aging Test for more than 15 minutes.
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: FOCUS
1.
Receive the monoscope pattern.
2.
Turn the Focus Volume fully counterclockwise once.
3.
Adjust the Focus Volume until picture is distinct.
2-4: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
Place the set with Aging Test for more than 10 minutes.
1.
Receive the white 100% signal from the Pattern
2.
Generator.
Using the adjustment control, set the brightness and
3.
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
4.
press the channel button (10) on the remote control to
select "R.BIAS".
Using the VOL. UP/DOWN button on the remote control,
5.
adjust the R.BIAS.
Press the CH. UP/DOWN button on the remote control to
6.
select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".
Using the VOL. UP/DOWN button on the remote control,
7.
adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS.
Perform the above adjustments 6 and 7 until the white
8.
color is looked like a white.
FUNCTION
NO.
OSD H
00
CUT OFF
01
RF DELAY
02
VIF VCO
03
H.VCO
04
H.PHASE
05
V.SIZE
06
V.SHIFT
07
R.DRIVE
08
B.DRIVE
09
R.BIAS
10
G.BIAS
11
B.BIAS
12
BRIGHT CENT
13
BRIGHT MAX
14
BRIGHT MIN
15
FUNCTION
NO.
CONTRAST CENT
16
CONTRAST MAX
17
CONTRAST MIN
18
COLOR CENT
19
COLOR MAX
20
COLOR MIN
21
TINT
22
SHARPNESS
23
FM LEVEL
24
LEVEL
25
SEPARATION 1
26
SEPARATION 2
27
TEST MONO
28
TEST STEREO
29
X-RAY TEST
30
Fig. 1-2
D-1
ELECTRICAL ADJUSTMENTS
2-5: SUB TINT/SUB COLOR
1.
Receive the color bar pattern.
2.
Connect the oscilloscope to TP023.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (22) on the remote control to
select "TINT".
4.
Press the VOL. UP/DOWN button on the remote control
until the section "A" becomes as straight line
(Refer to Fig. 2-1)
5.
Connect the oscilloscope to TP022.
6.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (19) on the remote control to
select "COL.CENT".
7.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 100% of the white
level. (Refer to Fig. 2-2)
8.
Receive the color bar pattern. (Audio Video Input)
9.
Press the TV/AV button on the remote control to set to
the AV mode. Then perform the above adjustments 2~7
"A"
2-8: VERTICAL SHIFT
NOTE: Adjust after performing adjustments in section 2-7
1.
Receive the crosshatch signal from the Pattern
Generator.
2.
Activate the adjustment mode display of Fig. 1-1
and press the channel button (07) on the remote
control to select "V.SFT".
3.
Press the VOL. UP/DOWN button on the remote
control until the horizontal line becomes fit to the
notch of the shadow mask.
2-9: 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. 2-3)
TV
00 OSD 15
Fig. 2-1
100%
white 100% red 100%
2-6: HORIZONTAL PHASE
1.
Receive the center cross signal from the Pattern
Generator.
2.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (05) on the remote control to
select "H.PHAS".
3.
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
right and left becomes minimum.
2-7: VERTICAL SIZE
NOTE: Adjust after performing adjustments in section 2-6
Receive the crosshatch signal from the Pattern
1.
Generator.
Activate the adjustment mode display of Fig. 1-1 and
2.
press the channel button (06) on the remote control to
select "V.SIZE".
Press the VOL. UP/DOWN button on the remote control
3.
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes 10 ± 2%.
Receive a broadcast and check if the picture is normal.
4.
Fig. 2-2
D-2
BA
2-10: VIF VCO
Place the set with Aging Test for more than 10 minutes.
1.
Receive an 80dB monoscope pattern.
2.
Connect the digital voltmeter between the pin 5 of
3.
CP601 and the GND.
Activate the adjustment mode display of Fig. 1-1 and
4.
press the channel button (03) on the remote control to
select "V.VCO".
Press the VOL. UP/DOWN button on the remote control
5.
until the digital voltmeter is 2.5V.
2-11: SUB BRIGHTNESS
Receive an 70dB monoscope pattern.
1.
Activate the adjustment mode display of Fig. 1-1 and
2.
press the channel button (13) on the remote control to
select "BRI.CENT".
Press the VOL. UP/DOWN button on the remote control
3.
until the screen begin to shine.
Press the TV/AV button on the remote to set to the
4.
AV mode. Then perform the above adjustment 2, 3.
2-12: SUB CONTRAST
Receive an 70dB the color bar pattern.
1.
Activate the adjustment mode display of Fig. 1-1
2.
press the channel button (17) on the remote control
to select "CONT.MAX".
Press the VOL. UP/DOWN button on the remote control
3.
until the contrast step No. become "40".
Press the TV/AV button on the remote to set to the
4.
AV mode. Then perform the above adjustment 2.
Press the VOL. UP/DOWN button on the remote control
5.
until the contrast step No. become "38".
Fig. 2-3
ELECTRICAL ADJUSTMENTS
2-13: Confirmation of Fixed Value (step No.)
Please check if the fixed values of the each adjustment
items are set correctly referring below.
NO.
FUNCTION
04
H VCO
14
BRIGHT MAX
15
BRIGHT MIN
16
CONT CENT
18
CONT MIN
20
COLOR MAX
21
COLOR MIN
23
SHARPNESS
24
FM LEVEL
25
LEVEL
26
SEPARATION 1
27
SEPARATION 2
28
TEST MONO
29
TEST STERO
RF
04
140
60
30
12
74
01
40
00
00
00
00
00
00
AV
04
140
60
30
12
75
01
40
00
00
00
00
00
00
D-3
ELECTRICAL ADJUSTMENTS
3.
PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
Turn the unit on and let it warm up for at least 30
1.
minutes before performing the following adjustments.
Place the CRT surface facing east or west to reduce the
2.
terrestrial magnetism.
Turn ON the unit and demagnetize with a Degauss Coil.
3.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
Tighten the screw for the magnet. Refer to the adjusted
1.
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
2.
generator.
Slide the deflection yoke until it touches the funnel
3.
side of the CRT.
Adjust center of screen to green, with red and blue on the
4.
sides, using the pair of purity magnets.
Switch the color bar generator from the green raster
5.
pattern to the crosshatch pattern.
Combine red and blue of the 3 color crosshatch pattern
6.
on the center of the screen by adjusting the pair of
4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
7.
pair of 6 pole magnets.
Adjust the crosshatch pattern to change to white
8.
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
generator.
2.
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.
3.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole
screen is green.
4.
Confirm red and blue colors.
5.
Adjust the slant of the deflection yoke while watching the
screen, then tighten the fixing screw.
DEFLECTION YOKE
DEFLECTION YOKE SCREW
MAGNET SCREW
3-3: STATIC CONVERGENCE
NOTE
Adjust after performing adjustments in section 3-2.
1.
Receive the crosshatch pattern from the color bar
generator.
2.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of
4 pole magnets.
3.
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
B
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
WEDGE
WEDGE POSITION
R
G
B
Fig. 3-2-a
WEDGE
WEDGE
Fig. 3-2-b
R G B
Fig. 3-1
PURITY MAGNETS
6 POLE MAGNETS
4 POLE MAGNETS
D-4
ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
CD802
CRT
L503
S501B
AC IN
S501A
CD501
CP502
FB401
CP802A
T502
MAIN PCB
CRT
CP401
CP601
W043
CD101B
TU001
CD101A
CRT
CD801
CP801
CD806
R807
CP806
TP023
J801
CRT PCB
R803
TP022
CP802B
D-5
SPEAKER
OS101
J703
2
J702
2
CH. UP
VOL. UP
CH. DOWN
VOL. DOWN
POWER
1
MICON IC
IC101 OEC7073A
AUDIO MUTE1
7
KEY2
6
KEY1
9
REMOCON
RED R
GREEN G
BLUE B
BLANK BL
H. SYNC
V. SYNC
RESET
POWER
H-CTL
CVIN
SCL1
SDA1
26
34
35
33
31
27
29
42
37
30
TU001
IF
SDA
11
5
5
SDA
SCL
AGC
1
4
CF601
6
MEMORY IC
SCL
IC199
S-24C02BDP-1A
X602
3.579545MHz
SAW FILTER
BLOCK DIAGRAM
CHROMA IC
IC601 M61250FP
X' TAL
34
59
RF AGC OUT
63
VIF IN (1)
64
VIF IN (2)
31
Y SW OUT
R IN
23
22
G IN
21
B IN36
FAST BLK
24
19
INV FBP OUT38
20
V PULSE OUT
27
SCL
SDA
26
30
MCU RESET
5
V OUT
53
EXT AUDIO IN
38
EXT C in
V-OUT IC
IC401 AN5522
AUDIO OUT
8.7V REG OUT
R OUT
G OUT
B OUT
AT5.7V REG OUT
FBP IN
POWER ON CONT
H OUT
P.CON 5.7V REG
VREG VCC
TV/Y IN
VIF VIDEO OUT
51
47
14
15
16
32
10
28
11
49
42
41
58
Q603
IC1001 AN7511
2 6
SOUND AMP
4
Q606
REG.
Q402
Q401
IC
8
REG.
H. DRIVE
H. OUTPUT
Q610
H-CTL
Q604, Q605
Q801
RED OUT
Q802
GREEN OUT
Q803
BLUE OUT
REG.
UNREG + 12V
2
3
1
SP1001
J1001
T502
8
6
13
4
Q504
FEED BACK
Q502
BUFFER
Q501
SWITCHING
Q507
FEED BACK
SW
D501~D504
RECTIFIER
DEGAUSS COIL
L503
1
3
5
2
F501
AC IN
L501
PUMP UP
AMP
73
5
9
3
+
Heater
4
6
DY
FB401
9
1
2
10
3
F
S
HV
F
7
RGB
8
TUNER VIDEO SIGNAL
R. SIGNAL
G. SIGNAL
B. SIGNAL
DEFLECTION SIGNAL
AUDIO SIGNAL
CRT
LUMINANCE SIGNAL
E-1 E-2
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