Page 1
SERVICE MANUAL
DTV2784
S/M CODE NO. M3W4062ASM
DATE OF ISSUE 02/2006
COLOR TELEVISION RECEIVER
ORIGINAL
VERSION (A)
All the specifications and features are subject to change without notice.
Page 2
IMPORTANT SERVICE SAFETY INFORMATION
Operating the receiver outside of its cabinet or with its
back removed involves a shock hazard. Work on
these models should only be performed by those who
are thoroughly familiar with precautions necessary
when working on high voltage equipment.
Exercise care when servicing this chassis with power
applied. Many B plus and high voltage RF terminals are
exposed which, if carelessly contacted, can cause
serious shock or result in damage to the chassis.
Maintain interconnecting ground lead connections
between chassis, escutcheon, picture tube dag and
tuner cluster when operating the chassis.
These receivers have a "polarized" AC line cord. The AC
plug is designed to fit into standard AC outlets in one
direction only. The wide blade connects to the "ground
side" and the narrow blade connects to the "hot side" of
the AC line. This assures that the TV receiver is properly
grounded to the house wiring. If an extension cord must
be used, make sure it is of the "polarized" type.
Since the chassis of this receiver is connected to one
side of the AC supply during operation, service should
not be attempted by anyone not familiar with the
precautions necessary when working on these types
of equipment.
When it is necessary to make measurements or tests with
AC power applied to the receiver chassis, an Isolation
Transformer must be used as a safety precaution and to
prevent possible damage to transistors. The Isolation
Transformer should be connected between the TV line
cord plug and the AC power outlet.
When removing springs or spring mounted parts from the
tuner, tuner cluster or chassis, shatterproof goggles must
be worn. Keep others without shatterproof goggles away.
Before returning the receiver to the user, perform the
following safety checks:
1.
2.
3.
Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the receiver.
Replace all protective devices such as nonmetallic
control knobs, insulating fishpapers, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators, etc.
To be sure that no shock hazard exists, a check for
the presence of leakage current should be made at
each exposed metal part having a return path to the
chassis (antenna, cabinet metal, screw heads,
knobs and/or shafts, escutcheon, etc.) in the
following manner.
Plug the AC line cord directly into a 120V AC receptacle.
(Do not use an Isolation Transformer during these
checks.) All checks must be repeated with the AC line
cord plug connection reversed. (If necessary, a
nonpolarized adapter plug must be used only for the
purpose of completing these checks.)
If available, measure current using an accurate leakage
current tester. Any reading of 0.35mA or more is
excessive and indicates a potential shock hazard which
must be corrected before returning the receiver to the
owner.
If a reliable leakage current tester is not available, this
alternate method of measurement should be used.
Using two clip leads, connect a 1500 ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series with
a known earth ground, such as a water pipe or conduit
and the metal part to be checked. Use a VTVM or
VOM with 1000 ohms per volt, or higher, sensitivity to
measure this AC voltage drop across the resistor. Any
reading of 0.35 volt RMS or more is excessive and
indicates a potential shock hazard which must be
corrected before returning the receiver to the owner.
TO EXPOSED
METAL PARTS
TO KNOWN
EARTH GROUND
AC SCALE
VT VM
0.15K OHMS
10W
15µ F
TEST PROBE
A1-1
Page 3
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 86°F~104°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 careful not to heat too long.
Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C).
All products with the printed circuit board with PbF printing must be serviced with lead free solder.
When soldering or unsoldering, completely remove all of the solder from the pins or solder area,
and be sure to heat the soldering points with the lead free solder until it melts sufficiently.
Distinction of PbF PCB:
Recommendations
Recommended lead free solder composition is Sn-3.0Ag-0.5Cu.
ABOUT LEAD FREE SOLDER (PbF)
•
•
•
A1-2
Page 4
A1-1
A1-2
A2-1
A3-1~A3-4
B1-1
B2-1, B2-2
C-1
C-1, C-2
C-3
D-1~D-6
E-1~E-5
F-1, F-2
G-1
H-1, H-2
H-3, H-4
I-1~I-4
I-5
J-1, J-2
J-3, J-4
J-5, J-6
J-7, J-8
J-9, J-10
J-11, J-12
J-13, J-14
J-15, J-16
J-17, J-18
J-19, J-20
J-21, J-22
J-23, J-24
J-25, J-26
K-1, K-2
L-1
M1-1
M1-1
M2-1~M2-7
TABLE OF CONTENTS
A2-1
IMPORTANT SERVICE SAFETY INFORMATION ...........................................................................................
ABOUT LEAD FREE SOLDER (PbF)...............................................................................................................
TABLE OF CONENTS ......................................................................................................................................
GENERAL SPECIFICATIONS ..........................................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP...................................................................................................................
2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ....................................................................
SERVICE MODE LIST.......................................................................................................................................
WHEN REPLACING EEPROM (MEMORY) IC .................................................................................................
RE-WRITE FOR DIGITAL SOFT FIRMWARE ...................................................................................................
ELECTRICAL ADJUSTMENTS .........................................................................................................................
TROUBLESHOOTING GUIDE ...........................................................................................................................
IC DESCRIPION ................................................................................................................................................
SEMICONDUCTOR BASE CONNECTIONS .....................................................................................................
BLOCK DIAGRAM
MICON/CHROMA ..........................................................................................................................................
SD DIGITAL MODULE ...................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT .....................................................................................................................................................
DIGITAL .........................................................................................................................................................
SCHEMATIC DIAGRAMS
MICON .........................................................................................................................................................
CHROMA/IF............................................................................................................................................... ......
DEFLECTION ................................................................................................................................................
POWER .........................................................................................................................................................
TUNER .........................................................................................................................................................
AV/SOUND ....................................................................................................................................................
CRT/SVM.......................................................................................................................................................
COMB/FILTER ...............................................................................................................................................
ASIC...............................................................................................................................................................
SDRAM .........................................................................................................................................................
FLASH .........................................................................................................................................................
FRONT END ..................................................................................................................................................
AV OUT .................................................................... . ..................................................................................
WAVEFORMS ....................................................................................................................................................
MECHANICAL EXPLODED VIEW .....................................................................................................................
MECHANICAL REPLACEMENT PARTS LIST..................................................................................................
ACCESSORY REPLACEMENT PARTS LIST................................................................................................. ....
ELECTRICAL REPLACEMENT PARTS LIST ...................................................................................................
Page 5
GENERAL SPECIFICATIONS
G-1 TV
CRT CRT Size / Visual Size 27 inch / 676.0mmV
SYSTEM
CRT Type Normal
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 1.0 + 1.0
W
10%(Typical) -
W
NTSC3.58+4.43 /PAL60Hz No
G-2 Tuning
Broadcasting System Analog US System M
System
Digital ATSC(8VSB), QAM
Tuner and System 1Tuner
Receive CH Destination USA(W/ CATV)
2 - 69, 4A, A-5 - A-1,
CH Coverage A - I, J - W, W+1 - W+84
Intermediate Digital 44.00MHz
Frequency Analog Picture(FP) 45.75MHz
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
27" 110 W at AC 120 V 60 Hz
Stand by (at AC) 3 W at AC 120 V 60 Hz
Per Year -- kWh/Year
Protector Power Fuse Yes
Safety Circuit Yes
IC Protector(Micro Fuse) No
G-4 Regulation
Safety UL
Radiation FCC
X-Radiation DHHS
G-5 Temperature
Operation
+5oC ~ +40oC
Storage
-20oC ~ +60oC
G-6 Operating Humidity
Less than 80% RH
G-7 On Screen
Menu Yes
Display
Menu Type Icon
Menu1 Picture Yes
Mode(Picture preference) No
Contrast Yes
Brightness Yes
Color Yes
Tint Yes
Sharpness Yes
Color Temperature No
Reset Yes
Audio Yes
MTS Yes
Bass No
Treble No
Balance No
BBE No
Stable Sound No
Speakers On/Off No
Audio Language Yes
Digital Output (PCM/Dolby Digital) Yes
Surround No
Reset Yes
Setup Yes
Language Yes
Clock Set Yes
TV/CABLE Yes
Auto CH Memory Yes
Add/ Delete Yes
Closed Caption Yes
CC Advanced (Size, Type, Edge, Yes
Color, Background Color)
Signal Meter Yes
Option
Yes
On/Off Timer Yes
A3-1
Page 6
GENERAL SPECIFICATIONS
Favorite CH No
CH Label Yes
Video Label No
Locks
Yes
Password Yes
V-Chip Yes
Video Lock Yes
CH Lock Yes
Game Timer No
Front. Panel Lock Yes
Control Level Yes
Volume Yes
Contrast Yes
Brightness Yes
Color Yes
Tint Yes
Sharpness Yes
Bass No
Treble No
Balance No
Signal Meter Yes
Stereo, SAP, Mono Yes
Video Yes
Component Yes
Channel(TV/Cable) Yes
CH Label Yes
Video Label No
Clock Yes
Game Timer No
On/Off Timer Yes
Sleep Timer Yes
Reset Yes
Sound Mute Yes
Picture Size Yes
V-chip Rating Yes
G-8 OSD Language
English French Spanish
G-9 Clock and
Sleep Timer Max Time 120 Min
Timer
Step 10 Min
On/Off Timer Program(On Timer / Off Timer) Yes
Timer Back-up (at Power Off Mode) more than -- Min Sec
G-10 Remote
Unit RC-KL
Control
Glow in Dark Remocon No
Format NEC
Remocon Format Orion
Custom Code 86-05 h
Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs
Total Keys 27 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 No
CH Up Yes
CH Down Yes
Volume Up Yes
Volume Down Yes
TV/Caption/Text Yes
CH1/CH2 No
TV/Video(TV/AV) Yes
CH RTN/CH ENT(Quick View) Yes
Sleep Yes
Display(Call) / - Yes
Reset Yes
Menu Yes
Enter Yes
A3-2
Page 7
GENERAL SPECIFICATIONS
Mute Yes
Exit Yes
MTS(Audio Select) Yes
Set + No
Set - No
Picture Size Yes
Multi Brand Keys CH Up(VCR) No
CH Down(VCR) No
Pause/Still No
TV/VCR(VCR) No
CH Enter No
Code Set (Code) No
FF No
Rew No
Rec No
Play No
Stop No
TV No
VCR No
Cable No
G-11 Features
Auto Degauss Yes
Auto Shut Off Yes
Canal+ No
Cable(CATV) Yes
Anti-theft No
Rental No
Memory(Last CH) Yes
Memory(Last Volume) Yes
V-Chip (Analog & Digital) Yes
Type USA, ORION Type
BBE No
Auto Search No
CH Allocation No
SAP Yes
Tone Control No
Just Clock Function No
Game Position No
CH Label Yes
VM Circuit No
Full OSD No
Premiere No
Comb Filter No
Lines
Auto CH Memory Yes
Hotel Lock No
Closed Caption (Analog & Digital) Yes
CC Advance Yes
Stable Sound No
Surround No
CH Lock Yes
Video Lock Yes
Game Timer (Max Time:120 Min) No
Energy Star No
Power On Memory Yes
Favorite CH No
FBT Leak Test Protect No
Mode(Picture Preference) No
Variable Audio Out No
Front Panel Lock Yes
QAM Yes
Digital Out Dolby Digital Yes
MPEG No
PCM Yes
DTS No
Zoom Yes
G-12 Accessories
Owner's Manual Language English / Spanish
w/Guarantee Card Yes
Remote Control Unit Yes
Rod Antenna No
Poles
Terminal
Loop Antenna
No
Terminal
U/V Mixer
No
A3-3
Page 8
GENERAL SPECIFICATIONS
DC Car Cord (Center+)
No
Guarantee Card
No
Warning Sheet
No
Circuit Diagram
No
Antenna Change Plug
No
Service Facility List
No
Important Safeguard
No
Dew/AHC Caution Sheet
No
AC Plug Adapter
No
Quick Set-up Sheet
No
Battery
Yes
UM-4 x 2pcs
OEM Brand
No
AC Cord
No
AV Cord (2Pin-1Pin)
No
Registration Card
No
Information Sheet
No
PTB Sheet
No
300 ohm to 75 ohm Antenna Adapter
No
Information Sheet(Return) Yes
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 No
Stand-by No
On Timer No
Terminals Front Video Input = VIDEO2
RCA
Audio Input = VIDEO2
RCA x 2 (L/MONO,R)
Other Terminal No
Rear Video Input(Rear1) = VIDEO1
RCA
Video Input(Rear2) No
Audio Input(Rear1) = VIDEO1
RCA x 2 (L/MONO,R)
Audio Input(Rear2) No
Video Output No
Audio Output No
S-Input Yes
Component Input2(w/ Analog Audio L/R)
RCA x 5
Digital Audio Out
Coaxial x 1
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input
F Type
AC Outlet No
G-14 Set Size
Approx. W x D x H (mm) 740 x 489.5 x 571.5
G-15 Weight
Net (Approx.) 35kg
( 77.2 lbs)
Gross (Approx.) 38Kg
(83.8 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 Material Double/White W/Photo Label
Dimensions W x D x H(mm) 850 x 575 x 665
Description of Origin Yes
Drop Test
Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Height (cm) 31
Container Stuffing 192
Sets/40' container
G-17 Material
Cabinet Cabinet Front PS 94V0 DECABROM
Cabinet Rear PS 94V0 DECABROM
PCB Non-Halogen Demand
No
Eyelet Demand
No
G-18 Environment
Environmental standard requirement (by buyer) Green procurement of ORION
Pb-free
Phase3(Phase3A)
A3-4
Page 9
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.
GND on the CRT
Screwdriver
Alligator Clip
Support
CRT
GND on the CRT
Rubber Cap
CRT
Support
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
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.)
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
DISASSEMBLY INSTRUCTIONS
Fig. 1-3
Fig. 1-4
Fig. 1-5
*
*
Fig. 1-1
B1-1
Page 10
B2-1
Masking Tape
(Cotton Tape)
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL
IC
Put Masking Tape (cotton tape) around the Flat Package
IC to protect other parts from any damage.
(Refer to Fig. 2-1.)
1.
Fig. 2-1
NOTE
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Blower type IC
desoldering machine
IC
Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 2-2.)
2.
Fig. 2-2
NOTE
Do not rotate or move the IC back and forth until IC
can move back and forth easily after desoldering the
leads completely.
When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 2-3.)
3.
Blower type IC
desoldering
machine
IC
Fig. 2-3
Tweezers
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 2-4.)
5.
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
Fig. 2-4
IC pattern
Page 11
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 Thintip 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
Page 12
C-1
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
Remocon Key
Operations
VOL. (-) MIN
0
Releasing of V-CHIP PASSWORD.
VOL. (-) MIN 1
Initialization of factory data.
NOTE:
Do not use this for normal servicing.
If you set factory initialization, the memories are reset such as the channel
setting, and the POWER ON total hours.
VOL. (-) MIN
6
Check for the firmware version.
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the
"
WHEN REPLACING EEPROM (MEMORY) IC
".
VOL. (-) MIN
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
9
Check of the SUM DATA and MICON VERSION on the screen.
Refer to the "
WHEN REPLACING EEPROM (MEMORY) IC
".
8VOL. (-) MIN
WHEN REPLACING EEPROM (MEMORY) IC
1.
2.
3.
4.
Turn on the POWER, and set to the TV mode.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (8) on the remote control for more than 2 seconds.
After the confirmation of each check sum, power on total hours, micon version and Digital TV MICON Firmware version,
turn off the power.
CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS, MICON VERSION AND
DIGITAL TV MICON FIRMWARE VERSION
Initial total of MEMORY IC, POWER ON total hours, MICON VERSION and Digital TV MICON Firmware VERSION 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".
Please refer to "CONFIRMATION OF INITIAL DATA" when SUM DATA is not corresponding.
FIG. 1
ADDRESS DATA
CRT ON 0015
OEC7144A_039
DTV d-a5Z253
INIT 0D9B
ROM: -4036
VOLUME: 0000
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)
MICON V ersion
Digital TV MICON Firmware
Initial setting data check sum.
Rom correction data check sum.
AUDIO External terminal Volume.
Page 13
C-2
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.
INI +0+1+2+3+4+5+6+7+8+9+A+B+C+D+E+F
00 C1 A2 4D 1A 22 00 02 00 00 80 10 00 30 36 03 00
10 68 00 00 00 00 00 00 00 00 00 18 07 00 05 AA 00
20 79 00 00 73 00 00 00 00 00 00 00 00 00 00 00 00
30 70 B0 06 01 03 04 20 02 01 00 D0 02 B1 10 00 00
40 00 00 00 00 00 00 00 80 80 80 00 40 40 00 00 00
50 00 00 00 00 1E 00 0C 00 45 00 02 00 02 80 00 C0
60 00 00 00 00 00 84 00 00 C2 04 01 00 00 01 02 00
70 00 00 00 14 07 00 63 2F 00 00 00 00 00 00 00 00
80 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 00 --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Table 1
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
The unit will now have the correct DATA for the new MEMORY IC.
Enter DATA SET mode by setting VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
ADDRESS and DATA should appear as FIG 1.
ADDRESS is now selected and should "blink". Using the UP/DOWN button on the remote, step through the ADDRESS
until required ADDRESS to be changed is reached.
Press RIGHT/LEFT button to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using UP/DOWN button until required DATA value has been selected.
Pressing RIGHT/LEFT button will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
After the data input, set to the initializing of shipping.
Turn POWER on.
Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds.
After the finishing of the initializing of shipping, the unit will turn off automatically.
FIG. 1
ADDRESS DATA
INIT 000 C1
CRT ON 0015
OEC7144A_039
DTV d-a5Z253
INIT 0D9B
ROM: -4036
VOLUME: 0000
CONFIRMATION OF INITIAL DATA
Page 14
C-3
Confirm that the AC cord is plugged out.
Using the Serial Communication Change JIG (JG198), connect the set to personal computer. (Refer to Fig. 1)
RE-WRITE FOR DIGITAL SOFT FIRMWARE
1.
2.
3.
Fig. 1
Ref. No.
JG198
Part No.
APJG198000
Parts Name
Serial Communication
Change JIG
Remarks
Up-Date of the Firmware
JG176
Using the Flash UP-Date Soft Disc (JG199) and USA SD DTV ROM DISC(JG176), please Re-write the DIGITAL SOFT
FIRMWARE.
The operating manual for Re-writing is included in Flash UP-Date Soft Disc (JG199).
JG199JG198
Serial Communication
Change JIG
Flash UP-Date Soft
Disc
Flash UP-Date Soft Disc
APJG199000
JG199
Up-Date of the Firmware
APJG176093
JG176
Connect the set to personal computer
USA SD DTV ROM
DISC
NOTE: It is possible to write only with the personal computer of WINDOWS.
USA SD DTV ROM
DISC
Page 15
ELECTRICAL ADJUSTMENTS
D-1
1. ADJUSTMENT PROCEDURE
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
2. BASIC ADJUSTMENTS
Prepare the following measurement tools for electrical
adjustments.
1. Oscilloscope
2. Digital Voltmeter
3. Multi-sound Generator
4. Pattern Generator
On-Screen Display Adjustment
1. In the condition of NO indication on the screen.
Press the VOL. DOWN button on the set and the Channel
button (9) on the remote control for more than 2 seconds
to appear the adjustment mode on the screen as shown in
Fig. 1-1.
Fig. 1-1
2.
3.
4.
Use the VOL. 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.
To display the adjustment screen for AV, CS and
DIGITAL mode, press the TV/VIDEO button on the
remote control to set to the AV, CS and DIGITAL mode.
Press the VOL.DOWN button on the set and the
channel (9) on the remote control for more than 2
seconds.
TV-A
00 OSD H
Fig. 1-2
FUNCTION
OSD H
OSD C
CUT OFF
H.POSI
H BLK L
H BLK R
V. SIZE
V POSI
V.LIN
VS CORR
V COMP
R.BIAS
G.BIAS
B.BIAS
R.DRV
G.DRV
B.DRV
BRI.CENT
BRI.MAX
BRI.MIN
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
NO.
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
FUNCTION
CONT.CENT
CONT.MAX
CONT.MIN
COL.CENT
COL.MAX
COL.MIN
TINT CENT
SHARP.CENT
SHARP.MAX
SHARP.MIN
SUB BIAS
H.SIZE
PARABOLA
TRAPEZIUM
COR TOP
COR BTM
TEST STEREO
TEST AUDIO
H FREQ
4:3
10
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. Before applying new silicon grease (YG6260M) ,
remove all the old silicon grease. (Old grease may
cause damages to the IC and Transistor.)
•
•
•
•
2-3: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus V olume until picture is distinct.
2-1: CONSTANT VOLTAGE
1.
2.
3.
Place the set in A V MODE without signal.
Connect the digital voltmeter to the TP003.
Adjust the VR502 until the digital voltmeter is 120 ± 0.5V.
2-2: CUT OFF
1.
2.
3.
4.
5.
Place the set in Aging Test for more than 15 minutes.
Place the set in A V 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 (02) on the remote control to
select "CUT OFF".
Adjust the Screen V olume until a dim raster is obtained.
2-4: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustment.
Place the set in Aging Test for more than 15 minutes.
Receive the white 100% signal from the Pattern
Generator.
Using the adjustment control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
select "R.BIAS".
Using the CH. UP/DOWN button on the remote control,
adjust the R.BIAS.
Press the VOL. UP/DOWN button on the remote control to
select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".
Using the CH. UP/DOWN button on the remote control,
adjust the R.DRIVE, B.DRIVE, G.BIAS or B.BIAS.
Perform the above adjustments 6 and 7 until the white
color is achieved.
1.
2.
3.
4.
5.
6.
7.
8.
Page 16
ELECTRICAL ADJUSTMENTS
D-2
2-5: BRIGHT CENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
Receive the monoscope pattern. (RF Input)
Set the screen mode to FULL.
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 (17) on the remote control to
select "BRI CENT".
Press the CH. UP/DOWN button on the remote control
until the white 2.7% 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
2~5.
Receive the monoscope pattern.
Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~5.
1.
2.
3.
4.
5.
6.
7.
8.
9.
2-6: CONTRAST MAX
Receive an over 70dB color bar 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 (21) on the remote control
to select "CONT.MAX".
Press the CH. UP/DOWN button on the remote
control until the contrast step No. becomes "100".
Receive a broadcast and check if the picture is normal.
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 2~5.
Receive a broadcast and check if the picture is normal.
Receive the monoscope pattern.
Press the TV/VIDEO button on the remote control to set to
the CS mode.Then perform the above adjustments 2~5.
2-8: COLOR CENT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Connect the oscilloscope to TP022.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (23) on the remote control to
select "COL.CENT".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and
0% is set to 4 scales on the screen of the oscilloscope.
Press the CH. UP/DOWN button on the remote control
until the red color level is adjusted to 110 ± 5% of the
white level. (Refer to Fig. 2-2)
Receive the color bar pattern. (Audio Video Input)
Press the AV mode. Then perform the above
adjustments 2~6.
Receive the color bar pattern.
Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~6.
Receive the digital color bar pattern.
Press the TV/VIDEO button on the remote control to set
to the DIGITAL mode.Then perform the above
adjustments 2~6.
2-9: HORIZONTAL POSITION
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
selec "H.POSI".
Press the CH. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right and
left becomes minimum.
Fig. 2-2
Fig. 2-1
2-7: TINT
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Receive the color bar pattern. (RF Input)
Using the remote control, set the brightness and contrast
to normal position.
Connect the oscilloscope to TP024.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (26) on the remote control to
select "TINT".
Press the CH. UP/DOWN button on the remote control
until the section A becomes as straight line.
(Refer to Fig. 2-1)
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
2~5.
Receive the color bar pattern.
Press the TV/VIDEO button on the remote control to set
to the CS mode.Then perform the above adjustments
2~5.
Receive the digital color bar pattern.
Press the TV/VIDEO button on the remote control to set
to the DIGITAL mode.Then perform the above
adjustments 2~5.
“A”
110%
white 100%
Page 17
ELECTRICAL ADJUSTMENTS
D-3
2-16: COR TOP/BTM
1.
2.
3.
4.
5.
6.
7.
Receive the crosshatch signal from the Pattern Generator.
Set the screen mode to FULL.
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 (34) on the remote control to
select "COR. TOP".
Press the CH. UP/DOWN button on the remote control
until both ends of the vertical lines become straight.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (35) on the remote control to
select "COR. BTM".
Press the CH. UP/DOWN button on the remote control
until both ends of the vertical lines of the screen become
parallel.
2-12: VER TICAL POSITION
1.
2.
3.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Adjust the VR401 until the horizontal line becomes fit to
the notch of the shadow mask.
(Refer to Fig. 2-3)
Fig. 2-3
Shadow mask
Notch
horizontal line
2-11: VERTICAL LINEARITY
Receive the monoscope pattern.
Using the remote control, set the brightness, contrast,
to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (08) on the remote control to
select "V.LIN".
Press the CH. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes minimum.
1.
2.
3.
4.
2-10: HORIZONTAL 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 (31) on the remote control to
select "H.SIZE".
Press the CH. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on the right
and left becomes 8± 3%.
2-13: VER TICAL 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 "V. SIZE".
Press the CH. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes 9 ± 2%.
1
2
2-14: 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 (33) on the remote control to
select "TRAPEZIUM".
Press the CH. UP/DOWN button on the remote control
until both ends of the right and left vertical lines of the 4th
length lines screen become parallel.
2-15: PALABOLA
1.
2.
3.
4.
Receive the crosshatch 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 (32) on the remote control to
select "PALABOLA".
Press the CH. UP/DOWN button on the remote control,
so that the line becomes straight from the outside of
the right and left.
2-17: OSD POSITION
1.
2.
3.
4.
Receive the monoscope pattern from the Pattern
Generator.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (00) on the remote control to
select "OSD H".
Press the CH. UP/DOWN button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-4)
Fig. 2-4
TV-A
00 OSD H
4:3
10
A
B
Page 18
ELECTRICAL ADJUSTMENTS
D-4
2-18: Confirmation of Fixed Value (Step No.)
Please check if the fixed values of each adjustment
item is set correctly referring below.
FUNCTION
OSD C
H BLK L
H BLK R
VS CORR
V COMP
BRI.MAX
BRI.MIN
CONT.CENT
CONT.MIN
COL.MAX
COL.MIN
SHARP.CENT
SHARP.MAX
SHARP.MIN
SUB BIAS
TEST STEREO
TEST AUDIO
H FREQ
NO.
1
4
5
9
10
18
19
20
22
24
25
27
28
29
30
36
37
38
RF
02
06
02
11
00
120
30
55
20
120
20
35
50
20
00
00
00
07
CS
02
06
02
11
00
120
30
50
20
120
20
25
40
10
00
00
00
07
AV
02
06
02
11
00
120
30
50
20
120
20
25
40
10
00
00
00
07
DIGITAL
02
06
02
11
00
120
30
55
20
120
20
25
40
10
00
00
00
07
Page 19
ELECTRICAL ADJUSTMENTS
D-5
3. PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
1.
2.
3.
Turn the unit on and let it warm up for at least 30
minutes before performing the following adjustments.
Place the CRT surface facing east or west to reduce the
terrestrial magnetism.
Turn ON the unit and demagnetize with a Degauss Coil.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
1.
2.
3.
4.
5.
6.
7.
8.
Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 3-1)
If the deflection yoke and magnet are in one body,
untighten the screw for the body.
Receive the green raster pattern from the color bar
generator.
Slide the deflection yoke until it touches the funnel side
of the CRT.
Adjust center of screen to green, with red and blue on
the sides, using the pair of purity magnets.
Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
Combine red and blue of the 3 color crosshatch
pattern on the center of the screen by adjusting the pair
of 4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
Adjust the crosshatch pattern to change to white by
repeating steps 6 and 7.
3-2: PURITY
NOTE
Adjust after performing adjustments in section 3-1.
1.
2.
3.
4.
5.
Receive the green raster pattern from color bar generator.
Adjust the pair of purity magnets to center the color on
the screen.
Adjust the pair of purity magnets so the color at the ends
are equally wide.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole screen
is green.
Confirm red and blue color.
Adjust the slant of the deflection yoke while watching the
screen, then tighten the fixing screw.
DEFLECTION Y OKE
DEFLECTION Y OKE 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
B
R
G
B
R G B
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
Fig. 3-2-a
WEDGE WEDGE
WEDGE
WEDGE POSITION
Fig. 3-2-b
Page 20
ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
W002
CP502
TP003
VR502
J708
J702
J705
J706
J707
VR401
J701
J704
SPEAKER
CRT
FB401
TU001
CRT
MAIN PCB
CD802
CP401
DIGITAL PCB
CD801
CP1001
CD1001
AC IN
D-6
CP802A
CP801A
R803
R805
TP022
TP024
CP801B
CP804
CP802B
J801
CRT PCB
S502
S501
CD501
CRT
CD804
S801
Page 21
TROUBLESHOOTING GUIDE
NO POWER
Yes
Is the voltage at the point (A)
in the Figure DC159.4V ?
E-1
Is the voltage at pin G
of Q502 DC5V ?
Yes
No
Broken wire of R501 or short circuit
on GND.
Check the rectifying circuit.
Yes
No
Yes
No
Is the voltage at the point (B)
in the Figure DC164V ?
Is the voltage at the point (C)
in the Figure AC120V ?
Yes
No
Broken wire of L501.
Is the voltage on both
ends of S501 AC120V ?
Broken wire of F501.
Yes
No
Broken wire of AC cord or check
S501.
Is the voltage at the point (E)
in the Figure AC120V ?
Check Q514 and associated circuit.
Check Q502 and associated circuit.
No
T501
5
R540
8
A
D
S
G
3
Q514
Q502
IC504
R539
R501
B
D501~D504
L501
C
E
F501
S501
CD501
Page 22
TROUBLESHOOTING GUIDE
Is the heater voltage at
pin 10 of J801 AC6.4V ?
Is the high voltage of
ANODE 27KV~28KV ?
No
NO RASTER
Does the RASTER
appear at maximum
BRIGHT/CONTRAST ?
Yes
No
Is the voltage of pin 1 of
CP801 DC180V ?
Yes
No
Check the output circuit and
associated circuit.
Check the 180V line.
Yes
Yes
No
Contact defects of CRT or CRT
Socket.
Check the HEATER circuit.
Yes
No
Is collector voltages
of Q405 DC115V and
Q402 DC17.3V ?
Check FB401 and associated circuit.
No
Yes
Is the waveform at base
of Q405 normal ?
No
Yes
Is the waveform at pin
23 of IC601 normal ?
Check the circuit from pin 23 of
IC601 to Q402.
Check IC601 and associated circuit.
E-2
Broken wire at pin 2 of T401.
Page 23
TROUBLESHOOTING GUIDE
NO COLOR
Are the waveform at pins 6,
8 and 11 of J801 normal ?
Yes
No
Defect of CRT or contact defects
of J801.
Are the waveform at pins 3,
4 and 5 of CP802 normal ?
Yes
No
Check the output circuit and
associated circuit.
Are the waveform at
pins 14, 15 and 16 of
IC601 normal ?
Yes
No
Are the waveforms at the
input of Q801~Q805 and
Q806 normal ?
Yes
No
Check Q801~Q806 and
associated circuit.
Check IC601 and associated circuit.
Is the pulse of crystal
X601 normal ?
No
Yes
Check the associated circuit of IC601.
Change X601.
E-3
Page 24
TROUBLESHOOTING GUIDE
NO VERTICAL
Is the waveform at pin
6 of CP401 normal ?
Yes
No
Check DY.
Is the waveform at pin
2 of IC401 normal ?
Yes
No
Check the circuit from pin 2 of
IC401 to CP401.
Is the waveform at pin 5
of IC401 normal ?
Yes
No
Is the voltage at pin 6
of IC401 25V ?
Yes
No
Check IC401 and check associated
circuit.
Check the 25V line.
Is the waveform at pin
19 of IC601 normal ?
No
Yes
Check the associated circuit of IC601.
Check the circuit from pin 19 of
IC601 to pin 5 of IC401.
E-4
Page 25
TROUBLESHOOTING GUIDE
NO SOUND
Yes
Is sound setting appropriate ?
Yes
No
Check speaker.
Is the AUDIO signal at pins
11 and 15 of IC701?
Yes
No
Check IC701 and associated circuit .
Check J701, J706, J707, J708 and
at pins 19, 20 of CP2403 and
associated circuit.
E-5
No
Yes
Check the pins 2, 4 of IC701 and
associated circuit .
Is the waveform at pins 2,4,
10 and pin 12 of IC1001?
Is the AUDIO signal input
at pins 1, 3, 5~9 and 13 of
IC701?
Page 26
IC DESCRIPTION
OEC7144A (IC101)
No. Pin name Symbol
I/O
Logic Function Option When unused
1 VHOLD V.HOLD_MAIN
I-
Condenser of slicer.
--
2 HLF HLF_MAIN
I/O -
Filter of slicer.
--
3 P94/SCL3/RxD2 SCL1
O1
IIC BUS(1) CLOCK output.
C-MOS -
4 P93/SDA3/TxD2 SDA1
I/O 1
IIC BUS(1) DATA I/O.
C-MOS -
5 P92/TB2/DIGR0 YUV-H
O0
SW COMPONENT
C-MOS OPEN
6 P91/TB1
O-
Not used.(L output)
C-MOS OPEN
7 P90/TB0 HSYNC
I1
SYNC input for SD distinction.
C-MOS PD
8 BYTE BYTE
I-
It connects it with VSS.
- VSS
9 CNVss CNVss
I - It connects it with VSS. When you write Flash "H" - PD
10 P87/XCIN/DIGG0
O - Not used.(32KHz IN) C-MOS OPEN
11 P86/XCOUT/DIGB0
O - Not used.(32KHz OUT) C-MOS OPEN
12 RESET RESET
I0
RESET input.
"L" ---> when Flash is written "H"
-PU
13 XOUT Xout
O-
Main Oscillation.
--
14 VSS VSS
Power
supply
-
GND
--
15 XIN Xin
I-
Main Oscillation.
--
16 VCCI VCC(3.3V)
Power
supply
-
3.3V
--
17 OSC1/OSCHLF OSCHLF
I-
External clock input for OSD.
--
18 OSC2
O-
Not used.(departure pendulum reserve for OSD)
- OPEN
19 P83/INT1 REMOCON
I0
REMOCON input.
C-MOS PU
20 P82/INT0 P.FAIL
I0
Power failure detection.
C-MOS PU
21 OUT1 BLANK1
O1
BLANK output for OSD/CCD(1)
--
22 OUT2 BLANK2
O1
BLANK output for OSD/CCD(2)
--
23 P77/HC1
O-
Not used.
C-MOS OPEN
24 P76/TA3
O-
Not used.
C-MOS OPEN
25 P75/HC0 EXT A MUTE
O1
Sound Mute for Audio out terminal
C-MOS OPEN
26 P74/TA2 VOLUME
O1
PWM output for Audio Volume
C-MOS OPEN
27 P73/CTS2,RTS2
O-
Not used.
C-MOS OPEN
28 P72/SCL2/CLK2
AFT2
O - Detect Tuner AFT2 (analog) C-MOS OPEN
29 P71/SCL1/RxD2
O-
Not used.
Nch-OD OPEN
30 P70/SDA1/TxD2
O-
Not used.
Nch-OD OPEN
31 P67/SDA2 AFT1
O-
Detect Tuner AFT1 (analog)
C-MOS OPEN
32 R/DIGR1 RED R
O1
RED output for OSD/CCD.
--
33 G/DIGG1 GREEN G
O1
GREEN output for OSD/CCD.
--
34 B/DIGB1 BLUE B
O1
BLUE output for OSD/CCD.
--
35 P63/TxD0 DTV Tx
O 0 Communication of Digital Module C-MOS PU
36 P62/RxD0 DTV Rx
I 0 Communication of Digital Module C-MOS PU
37 P61/CLK0 (CLK0)
O - Not used. C-MOS PU
38 P60/CTS0,RTS0 (PRT0)
O - Not used. C-MOS PU
39 P57,RDY/CLK
O-
Not used.(L output)
C-MOS OPEN
40 P56/ALE DTV RESET
O 0 Reset output of Digital Module C-MOS OPEN
41 P55/HOLD
O - Not used. C-MOS PD
42 P54/HLDA
O - Not used. C-MOS OPEN
43 P53/BCLK
O - Not used. C-MOS OPEN
44 P52/RD
O - Not used. C-MOS OPEN
45 P51/WRH/BHE
O - Not used. C-MOS OPEN
46 P50/WRL/WR
O - Not used. C-MOS PU
47 P47/CS3
SD O 1
Detect Tuner SD (analog)
C-MOS OPEN
F-1
Page 27
IC DESCRIPTION
OEC7144A (IC101)
No. Pin name Symbol
I/O
Logic Function Option When unused
48 P46/CS2
O - Not used. C-MOS OPEN
49 P45/CS1
O - Not used. C-MOS OPEN
50 P44/CS0
O - Not used. C-MOS OPEN
51 P43/A19
AUDIO MUTE O 1
Volume MUTE output.
C-MOS OPEN
52 P42/A18
O-
Not used.
C-MOS OPEN
53 P41/A17
O-
Not used.
C-MOS OPEN
54 P40/A16
VIDEO MUTE O 1
Image MUTE output.
C-MOS OPEN
55 P37/A15
EEPROM_SCL O 1
IIC CLOCK output for EEPROM.
C-MOS PU
56 P36/A14
EEPROM_SDA I/O 1
IIC DATA I/O for EEPROM.
C-MOS PU
57 P35/A13
O-
Not used.
C-MOS OPEN
58 P34/A12
O-
Not used.
C-MOS OPEN
59 P33/A11
O-
Not used.
C-MOS OPEN
60 P32/A10
O-
Not used.
C-MOS OPEN
61 P31/A9
O-
Not used.
C-MOS OPEN
62 Hsync
HD I -
HSYNC input for OSD.
--
63 P30/A8
O-
Not used.
C-MOS OPEN
64 Vsync
VD I -
VSYNC input for OSD.
--
65 P27/A7
O-
Not used.
C-MOS -
66 P26/A6
O-
Not used.
C-MOS OPEN
67 P25/A5
O-
Not used.
C-MOS OPEN
68 P24/A4
O-
Not used.
C-MOS OPEN
69 P23/A3
O-
Not used.
C-MOS OPEN
70 P22/A2
O-
Not used.
C-MOS OPEN
71 P21/A1
O-
Not used.
C-MOS OPEN
72 P20/A0
O-
Not used.
C-MOS OPEN
73 P17/D15
O-
Not used.
C-MOS OPEN
74 P16/D14
O-
Not used.
C-MOS OPEN
75 P15/D13
O-
Not used.
C-MOS OPEN
76 P14/D12
O-
Not used.
C-MOS OPEN
77 P13/D11
O-
Not used.
C-MOS OPEN
78 P12/D10
SI0
S jacks input of distinction input.
C-MOS PU
79 P11/D9
O-
Not used.
C-MOS PU
80 P10/D8
O-
Not used.
C-MOS PU
81 P07/D7
TV POWER O 1
TV POWER control output.
C-MOS OPEN
82 P06/D6
O-
Not used.
C-MOS OPEN
83 P05/D5
DTV POWER O 1 Power SW of Digital Module C-MOS OPEN
84 P04/D4
STAND BY-L O 0
SUB power supply control terminal.
C-MOS OPEN
85 P03/D3
DEGAUSS O 1 Degauss control output C-MOS OPEN
86 P02/D2
IIC_OFF I 0
IIC BUS STOP input for adjustment.
C-MOS PU
87 P01/D1
PROTECT O 1 Control H Pulse C-MOS PU
88 P00/D0
H_CTL O 1
Control H Pulse
C-MOS PU
89 P107/AN5/DIGR2
E0-LEAK I 1
E0 LEAK Detection
C-MOS PD
90 P106/AN4/DIGG2
O - Not used.(L output) C-MOS OPEN
91 P105/AN3/DIGB2
AFT_MAIN I -
AFT voltage input for tuning in.
C-MOS PU
92 P104/AN2
KEY B I -
Main unit key input.
Nch-OD PU
93 P103/AN1
KEY A I -
Main unit key input.
Nch-OD PU
94 P102/AN0
X-RAY I 1 X-RAY Detection Nch-OD PD
95 VHOLD2
VHOLD2 I - Condenser of slicer. - PD
96 HLF2
HLF2 O - Filter of slicer. - PD
97 CVin2
CVIN2 I - Not used. - PU
98 TVSETB
TVSETB I -
It connects it with VSS.
- VSS
99 VCCE
VCC(5V)
Power
supply
-
5V
--
100 CVin1
CVIN_MAIN I -
Video signal input
--
F-2
Page 28
DIODE
RD47FBD-3 1N4002-PAN 1N4005-EIC RB085T-40 ENE271D-10A
1SS133T-77 1N4937-PAN 21DQ09N-TA2B1
AU02A-EIC RM11C-EIC
DSS-272M-S00B SB140-EIC
ERD07-15L50
FE201-6L49
MTZJ10B-EIC
MTZJ15B-EIC
MTZJ18B-EIC
MTZJ2.2B-EIC
MTZJ3.3B-EIC
MTZJ3.9B-EIC
MTZJ33B-EIC
MTZJ5.6B-EIC
MTZJ6.2B-EIC
MTZJ8.2B-EIC
MTZJ9.1B-EIC
IC
CAS-220/CS HY5DU561622DTP-D43 CS4345-CZZ AT24C128N-10SU-1.8 PST3229NR
LA76327M-MPB-E NJM2750M(TE1) TC7W66FU(TE12L,F)
LA7847-E BA7810T-V5 OEC7144A AN17822A SST39VF1681-70-4C-EKE
TRANSISTOR
PS2561AL1-1-V(W) ZR39640BGCG-B1 BA00BC0WFP-E2 2SA1371(D,E)-AE KTC3198-AT(Y,GR)
2SC2909(S,T)-AA KTC3199_Y-AT
KTA1266-AT(Y,GR) KTC3203_Y-AT
KTA1271_Y-AT KTC3209_Y-AT
KTC3227_Y-AT
2SC3841-T1B_T63 2SD2499(LBOEC1) KTC4217(O,Y)
KRA102SRTK
KRC102SRTK
KRC103SRTK
KRC104SRTK
KTA1504S_Y_RTK
KTC3875S_Y_RTK
KTC4075E-Y-RTK/P
SEMICONDUCTOR BASE CONNECTIONS
1
1
1
18151
151
1
1
1
1
1
5
CBECE
C
B
ECB
E
C
B
G-1
Page 29
MICON/CHROMA BLOCK DIAGRAM
CHROMA IC
IC601 LA76327M-MPB-E
3
5
1
9
30
TUNER CVBS
VIDEO IN1
VIDEO IN2
Y IN
29
V IN
X101
8MHz
1
OS101
57
OSD_R
VOL UP
42
VOL DOWN
CH DOWN
MICON
IC101 OEC7144A
55
33
OSD_G
34
OSD_B
J801
6
11
8
F
7
DY
56
32
OSD_R
28
U IN
POWER
23
19
V OUT
H OUT
OSD BLK1
54
V-OUT IC
IC401 LA7847-E
CRT
V801
15
16
14
B OUT
G OUT
R OUT
21
BLANK1
Q802, Q806
BLUE OUT
Q803, Q805
GREEN OUT
Q801, Q804
RED OUT
FB401
2
5
3
S-JACK
J702
4
LINE1(REAR)
J701
6
FRONT -VIDEO
J705
2
5
YUV_IN
J704
2
3
6
AV SW
IC701 NJM2750M(TE1)
13
9
3
1
FRONT-AUDIO.L
J706
FRONT-AUDIO.R
J707
2
3
2
2
6
8
10
SOUND AMP
IC1001 AN17822A
12
11
15
TU001
9
51
SCL1
50
SDA1
64
VD
62 HD
93
KEYA
92
KEYB
19
REMOCON
15
X.IN
13
X.OUT
CH UP
X602
3.579545MHz
35
XTAL 3.58
8
5
1
F
S
HV
Q405
Q402
H.OUT
H.DRIVE
6
FBP IN
9
3
SCL1
4
SDA1
59
INV.FBP OUT
60
V PULE OUT
H-1
H-2
SPEAKER
SP1001
2
4
OSD BLK2
58
22
BLANK2
L
R
L
R
6
5
MEMORY IC
IC199 AT24C128N-10SU-1.8
SCL
SDA
56
55
Tuner Audio (L)
Tuner Audio (R)
AV2 AUDIO IN/COX OUT
J708
2
3
6
7
AUDIO YUV R
AUDIO YUV L
S.VIDEO Y
44
S.VIDEO C
40
COMB Y
COMB C
OSD_G
OSD_B
EEPROM_
SDA
EEPROM_
SCL
(BUSY)38
DTV Tx
35
(CLK0)
37
CNVss
9
DTV Rx
36
TX
BUSY
6
7
CLK
RX
2
5
CNVSS
RESET
MICON_DATA
CP101
1
4
SYSTEM RESET
IC102 PST3229NR
IN
2
OUT
1
RESET
12
D101
SCL_EEP
SDA_EEP
7
SCL1
2
3
SDA1
EEP_DATA
CP102
6
VIDEO1
AUDIO IN(L)
AUDIO IN(R)
10
13
1920
TU I2C CLK
TU I2C DATA
34IF OUT2
26
25
IF OUT1
CP4203B
33
35
36
13
12
TX
RX
19
20
18
17
24
AUDIO L
AUDIO R
C OUT
Y OUT
SPDIF OUT
DTVRX
DTVTX
R. SIGNAL
B. SIGNAL
G. SIGNAL
Page 30
CP2403
87760-3416
1
1011121314
15
161718
192202122232425262728
29330
313233
34
4
5
678
9
SD DIGITAL MODULE BLOCK DIAGRAM
11
N17U17K1L3N1U14H17J17
7109
2413
T3R2R6T4T1L15
1618979394
80
79
U1
R5
R4
T2
R3
K15
J1
K2
66
63
65
52
54
56
57
61
20
19
M15
U7
12
16
11
16
16
ADR
DAT
WP
WE
ADR
DAT
14
16
RESET
+3.3V
IC2402 8VSB/QAM/BTSC DEMOD.
CS4345-CZZ
IC2501 AUDIO DAC
AUDIO-L
AUDIO-R
+5V
RESET
SIF AMP
+2.6V
+2.6V
ASIC+1.8V
+3.3V
AFT(0)
AFT(1)
TX
RX
SD-H
Y OUT
C OUT
SCLK
ADATA
WS
BCLK
SPDIF
RF_SW
I2C1_CLK
I2C1_DATA
F/E_RESET
TS_DATA
TS_CLK
TS_FRAME
TS_DVALID
ADATA
WS
BCLK
+3.3V
C OUT
Y OUT
ASIC+1.8V
+2.6V
+5V
+3.3V
RESET
SD-H
AFT(0)
AFT(1)
TX
RX
AUDIO-L
AUDIO-R
SPDIF OUT
SIF
F/E+1.8V
IF AGC
GND
GND
IF OUT2
IF OUT1
NCNC
NCNC
RF_SW
SIF SIF
TU I2C DATA
TU I2C DATA
TU I2C CLK
TU I2C CLK
F/E+1.8V
IF AGC
IFN
IFP
IC2404 256Mbit DDRSDRAM
HY5DU561622DTP-D43
ZR39640BGCG-B1
IC2401 SD_DTV ASIC
25.000MHz
24.576MHz
X2401
CAS-220/CS
SST39VF1681-70-4C-EKE
IC2408 16Mbit NOR FLASH
X2402
NCNC
GND
GND
GND
GND
GND
GND
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