iLO DTV2794 User manual

C-1
SERVICE MODE LIST
This unit is provided with the following SERVICE MODES so you can repair, examine and adjust easily.
To enter to the SERVICE MODE function, press and hold both buttons simultaneously on the main unit or on the main unit
and on the remote control for more than a standard time in the appropriate condition.(See below chart.)
In case of the main unit and remote control, press the remote control buttons first, then press the main unit buttons.
ADDRESS DATA
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)
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, Digital TV MICON Firmware and MICON VERSION,
turn off the power.
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:
WHEN REPLACING EEPROM (MEMORY) IC
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
CRT ON 0000
OEC7174A_23
DTV CTT71222
INIT 26B2
ROM: 43EB
MICON Version
Initial setting data check sum.
Rom correction data check sum.
Digital TV MICON Firmware
CONFIRMATION OF CHECK SUM, POWER ON TOTAL HOURS, MICON VERSION AND
DIGITAL TV MICON FIRMWARE VERSION
Releasing of V-CHIP PASSWORD.
Initialization of factory TV data.
NOTE: If you set factory initialization, the memories are reset such as
the channel setting, and the POWER ON total hours.
Set Key Operations
VOL. DOWN
(Minimum)
Remocon
Key
0 2 sec.
VOL. DOWN
(Minimum) 1 2 sec.
Standard
Time
Set
Condition
POWER ON
POWER ON
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
VOL. DOWN
(Minimum) 6 2 sec.
VOL. DOWN
(Minimum) 9 2 sec.
POWER ON
POWER ON Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display
Adjustment).
Check of the SUM DATA, MICON VERSION, POWER ON total hours
and Digital TV MICON Firmware on the screen.
Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
VOL. DOWN
(Minimum) 2 sec.
POWER ON 8
NOTE: The each item value might be different according to each set.

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.
Table 1
ADDRESS DATA
FIG. 2
INIT 00 43
CRT ON 0000
OEC7174A_23
DTV CTT71222
INIT 26B2
ROM: 43EB
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
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 2.
ADDRESS is now selected and should "blink". Using the CH. UP/DOWN button on the remote, step through the
ADDRESS until required ADDRESS to be changed is reached.
Press VOL. UP/DOWN button to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using CH. UP/DOWN button until required DATA value has been selected.
Pressing VOL. UP/DOWN 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 on the Power.
Set the VOLUME to minimum.
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.
CONFIRMATION OF INITIAL DATA
INIT +0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
00 43 00 00 20 09 B3 24 0D 4B 80 00 A0 FA 00 00 00
10 00 00 00 65 4E 34 10 A1 00 00 00 00 60 00 10 8C
20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 08
30 88 00 00 00 00 09 72 05 05 00 00 00 87 03 C8 22
40 02 33 00 00 04 23 2D 20 00 40 20 40 40 40 00 00
50 00 64 00 00 00 00 00 00 0A 45 A0 00 FF 01 00 00
60 00 88 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 00 00 00 00 00 00 00 00 00 03 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 05 9D 01 00 84
A0 04 11 00 00 00 05 00 01 00 00 00 05 12 13 05 82
B0 01 00 00 00 00 04 00 04 00 02 00 00 00 00 00 00
C0 08 24 2F 33 37 38 39 3A 3B 3C 3C 3D 3F 40 40 41
D0 42 44 45 46 47 48 49 4A 4B 4C 4C 4D 4E 4F 50 50
E0 51 52 53 53 54 54 55 55 57 58 5A 5B 5C 5D 5E 5F
F0 61 62 64 66 68 6E 73 78 7D 82 86 8A 8E 8E 8F 8F

C-3
Confirm that the AC cord is plugged out.
Using the Serial Communication Change JIG (JG205), connect the set to personal computer. (Refer to Fig. 1)
SERVICING FIXTURES AND TOOLS
1.
2.
3.
Ref. No.
JG205
Part No.
APJG205000
Parts Name
Serial Communication
Change JIG
Remarks
Up-Date of the Firmware
JG176
Using the Flash UP-Date Soft Disc (JG206) 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 (JG206).
JG206JG205
Serial Communication
Change JIG
Flash UP-Date Soft Disc
Flash UP-Date Soft Disc
APJG206000
JG206
Up-Date of the DIGITAL Firmware
APJG176125JG176
Connect the set to personal computer
2007 SD DTV Rom Disc
NOTE: It is possible to write only with the personal computer of WINDOWS.
2007 SD DTV Rom Disc
Fig. 1
RE-WRITE FOR DIGITAL SOFT FIRMWARE

ELECTRICAL ADJUSTMENTS
D-1
1. ADJUSTMENT PROCEDURE
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 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.
To display the adjustment screen for TV-A, TV-D, AV
and YUV mode, press the INPUT button on the remote
control. 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
29
30
31
NO.
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
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
X-RAY
4:3
20
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, remove all the
old silicon grease. (Old grease may cause damages to the
IC and Transistor.)
•
•
•
•
2-4: FOCUS
1.
2.
3.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the FocusVolume until picture is distinct.
2-1: CONSTANTVOLTAGE
1.
2.
3.
Place the set in AV MODE without signal.
Connect the digital voltmeter to the TP003.
Adjust the VR502 until the digital voltmeter is 130 ± 0.5V.
2-2: CUT OFF
1.
2.
3.
4.
5.
Place the set in Aging Test for more than 15 minutes.
Place the set in AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select “CUT OFF”.
Adjust the Screen Volume until a dim raster is obtained.
2-3: 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 VOL. UP/DOWN button on the remote control,
adjust the R.BIAS.
Press the CH. UP/DOWN button on the remote control to
select the "R.DRIVE", "B.DRIVE", "G.BIAS" or "B.BIAS".
Using the VOL. 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.