This model’s setting are adjusted in two different ways: though the I2C bus control and in the
conventional analog manner. The adjustments via the I2C bus control include preset-only items
and variable data.
1. Setting the service mode by the microprocessor.
1 Make a short-circuit JA373 and JA374, enter into the service mode. (Adjustment through
the I2C bus control). (Use JWS Key to set as well).
2 Press the CH DOWN / UP key on the remote controller to get ready to select the mode
one by one.
3 Press the CH DOWN / UP key on the remote controller to select the modes reversibly
one by one.
4 Using the VOLUME UP/ DOWN key on the remote controller, the data can be modified.
5 When the short circuit between JA373 and JA374 is cut off, it will be released from the
service mode.
2. Factory Presetting.
1 Make a short-circuit JA373 and JA374 and turn on the main power switch. Initial values
are automatically preset, only when a new EEPROM is used (Judge with the first 4
bytes).
2 The initial data are preset as listed in page.
3
3 Make sure the data need modify or not (Initial data).
Note: Once the chassis has been assembly together and ready to be POWER ON for the
FIRST TIME, make sure to make a short-circuit JA373 and JA374 to switch to the
service mode position first and then turn on the main power switch. (See 2-1 above).
Precaution: If haven’t done this initiation, it may possibly generate excessive Beam
current.
1.) In the Service Mode, Key is used to select the mode in the following order.
SERVICE MODE 1
RASTER
MODE
SUB 2 ADJ.
MODE
Press the MENU button
at the remote controller,
it will enter into
Service Mode Option.
CUT OFF
MODE
60 Hz ADJ.
MODE
SERVICE MODE
OPTION
50Hz ADJ.
MODE
SUB 1 ADJ.
MODE
Press the MENU button
again at the remote controller,
it will jump back to
Service Mode 1.
Press service/ language for 2 sec,
it will enter into service mode 2.
Press service/ language for 2 sec again,
it will jump back to service mode 1.
SUB COLOR(SUB COLOR)
SUB COLOR (DVD) (SUB COLOR DVD)
V-ENT(V-ENT)
H-ENT(H-ENT)
RF AGC(RF AGC)
SECAM BELL(SCM BELL)
SPRIT/INTER(S/I)
RF SUB SOUND(RF S-SOUND)
HEAD PHONE(HP SUB VOL)
SUB VOLUME ADJ.
COLOR TEMP.(WT)
PIFVCO(PIFVCO)
LNA(LNA)
SIF 574(SIF 574)
AFC(AFC)
User Data in Service Mode Option
• While SERVICE MODE 1 on, EEPROM DATA will switch to the service data.
Also, once press the menu button at the remote controller, EEPROM will switch
to SERVICE MODE OPTION.
Once press the menu button again at the remote controller, EEPROM will switch
back to SERVICE MODE 1.
• In the service option the user data establish as below,
After short JA373 & JA374, and turn on the main power switch, read data from EEPROM Address
00H ~ 03H, and compare to the list below, if different, initialize the EEPROM.
#1 Whiles selecting SERVICE MODE 1, MICOM Version Information, SOFTWARE V ersion Informa-
tion, check some iformation will be displayed.
#2 60 Hz Adjustment Value is programmed from ± 50 Hz Adjustment value.
EEPROM SETTING DATA EEPROM SETTING DATA EEPROM SETTING DATA
V-SIZE+9V-POSITION-3E/W PARABOLA-20
V-LINEARITY0H-POSITION+3E/W CORNER-2
VS-CORRECTION+1H-SIZE+2TRAPEZIUM-11
#3 While adjusting SECAM R-Y, SECAM B-Y and S BLACK of 1 chip is set to 1.
#4 While choosing PIFVCO MODE and RF AGC set to "0 0" and PIFVCO is set to "1".
(1) Execute MCL 1/2 key to set the following data in EEPROM.
STTM
R/C CODEMCL 4(171:Abh)
TV-CH.CH-No.Fv (MHz)S-SYSTEM
0
1Thai Local CH-355.25PAL B/G
2Thai Local CH-5175.25PAL B/G
3Thai Local CH-7189.25PAL B/G
4Thai Local CH-9203.25PAL B/G
5Thai Local CH-11217.25PAL B/G
6Thai Local CH-29535.25PAL B/G
7
8
(1) The following default data has been factory-set for the E2PROM.
ITEMSDATA SETTING
R/C238(EEh)
S-SYSTEMB/G
LANGUAGETHAI
SELECT
# FACTORY-SET 8 OPERATE MCL2
LAST POWERON
LAST TV/AV MODETV
LAST CHCH1
FLASH BACKCH1
FAVORITE CH1CH10
FAVORITE CH2CH20
FAVORITE CH3CH30
FAVORITE CH4CH40
1 DIGIT/2 DIGIT2 DIGIT
VOLUME0
H/P-VOLUME0
ROTATION0
SAVEOFF
AV MODE2
BALANCE0
BLUE BACKOFF
8
AUTO SELECTON
# SERVICE MODE DATA
ITEMDATA SETTING
MODE123
CONTRAST###
COLOUR###
BRIGHT000
TINT000
SHARPNESS###
PEICTURE NROFFOFFOFF
WHITE TEMP000
SHAKITOFFOFFOFF
BASS +###
SOR/SPAOFFOFFOFF
LEVEL000
BASS#0#
TREBLE#0#
FACTORYSET 9
VMON
TEXT1
LNAOFF
ON TIMEROFF
ON TIMER CHNO SETTING
ON TIMER VOLUMENO SETTING
REMINDEROFF
AFTALL CH ON
COLOUR SYSTEMALL CH AUTO
SKIPALL CH OFF
NICAM ON/OFFALL CH ON
NICAM STEREO MODEALL CH STEREO
NICAM BILINGUAL MODEALL CH M1
NICAM MONO MODEALL CH MONO
IGR ON/OFFALL CH ON
IGR STEREO MODEALL CH STEREO
IGR BILINGUAL MODEALL CH MAIN
MONO BILINGUAL MODESOUND1
SOFTSTANDARDDYNAMIC
ITEMDATA SETTING
No.
Adjustment point
Tuner IFT
1
(PRESET)
TU200
2RF-AGC
TAKE OVER
POINT
ADJUSTMENT
(I2C BUS
CONTROL)
3PIF VCO COIL
ADJUSTMENT
SERVICE ADJUSTMENT
PIF ADJUSTMENT CHECKING
Adjustment Condition / ProcedureWaveform or others
1. Get the tuner ready to receive the CH. E-10
signal, but with no signal input.
Adjust the PLL data.
2. Connect the sweep generator’s output cable
to the tuner antenna. (RF SWEEP)
3. Adjust the sweep generator’s to 80dBµV.
4. Connect the response lead (use LOW IMPEDANCE probe with wave detector ; see Fig.1)
to the tuner’s IF output terminal. (This terminal
must have the probe alone connected).
5. Set the RF AGC to 0 - 6 V with no saturation
with the waveform.
6. Adjust the tuner IF coil to obtain the waveform
as shown in Fig. 2.
Note: Be sure to keep the tuner cover in position
during this adjustment.
1. Receive the PAL Colour bar signal.
Signal Strength: 54 ± 1 dbµV (75Ω open)
2. Connect the oscilloscope to TP201 (Tuner’s
AGC Terminal) as shown in Fig. 3.
Oscilloscope
+
0.1V
–
+
–
Bias Box : about 4.5V
BIAS Box
TP201
TV SET
Fig. 3
3. Call "RF-AGC" mode in service mode. Adjust
the "RF-AGC" bus data to obtain the Tuner output pin drop 0.1 ~ 1.0 V below maximum voltage.
4. Change the antenna input signal to 63 ~
67 dBµV, and make sure there is no noise.
5. Turn up the input signal to 90 ~ 95 dBµV to be
sure that there is no cross modulation beat.
1. Do not receive any signal.
2. Connect the digital voltmeter to TP803 (pin (54)
of IC800) in the main unit.
3. Call the "PIF VCO" Mode at the service mode.
4. Verify that it is turned counterclockwise to 0V
and adjust T800 to make DC voltage of TP803
become 2.5 ± 0.1 V in the range.
Oscilloscope
Note:
Precaution:
DC voltage at TP803
5V
2.5V
Down
Adjust T800 to B point, between B'
and B". (Point A and C is NG.)
* Turn the coil counterclockwise for
the up direction and clockwise for
the down direction.
10k
100k
P C
For the 50Ω signal strength
gauge, when not using 50/75
impedance adapter, signal
strength is 52 ± 1 dBµV (75Ω
open), instead of 54 ± 1 dBµV
(75Ω open).
The loss of using impedance
adapter.
Fig. 1
E-9 CH
Fig. 2
BB"CUPB’A
1n60
29WF50
1000p
IF OUT
75ohm
-1.5+/-0.8dB
8-18-2
9
No.
Adjustment point
1SUB VOL
(BUS
ADJUSTMENT)
2 NOISE MUTE
CHECKING
No.
Adjustment point
1 VCO COIL
T2300
(SX68KF7)
SOUND ADJUSTMENT
Adjustment Condition / ProcedureWaveform or others
1. Receive PAL Colour Bar signal.
Signal content: 400 Hz 100% Mod.
2. Connect the probel of the meter (*) to (SI) connector.
3. Select the SUB-VOL in the service mode.
4. Adjust the SUB-VOL data to make the meter
indicate 5.0 Vrms (at L-CH)
Adjustment value: 5.0± 0.3 Vrms
-0.05 Vrms
1. Receive the PAL Colour Bar signal.
2. Turn up the volume control to maximum, make
sure the sound is heard from the speakers.
Then put the unit in no signal state.
3. Check the sound mute is effective.
4. Finally turn sound level of CTV to minimum.
Note:The setting below is automatically set when the SUB-VOL
is selected in the service mode.
* SURROUND OFF
* S-NORMAL state
* S-VOL Max
* Bass + OFF
SIF(NICAM/IGR) ADJUSTMENT
Adjustment Condition / ProcedureWaveform or others
1. Receive the PAL Colour Bar signal.
(Set the receiving frequency at AFT OFF VHF
high frequency.)
2. Connect the digital voltmeter to TP2300 or pin
(1) of SC200 (in the main unit).
3. Verify that it is turned counterclockwise to 0V
and clockwise to 5V , and adjust T2300 to make
the DC voltage of TP2300 become 2.5 ± 0.1 V
in the range.
* Single-unit adjustment
Vcc5 ± 0.1V
IF input frequency 38.9MHz ± 10kHz. Control it
under these conditions.
Adjust T2300 to make the DC voltage of TP2300
(in the NICAM unit) become 2.5 ± 0.1V.
After single-unit adjustment, check the practical
setup.
Align the receiving frequency to the select channel frequency. (AFT OFF)
The checked voltage must be2.5 ± 1.0V.
(Take care that ± 1.0 is considered for the Vcc
difference between the single unit and unit, Fo
difference and so on, but is not the adjustment
precision.)
No.
Adjustment point
1 PURITY
ADJUSTMENT
PURITY ADJUSTMENT
Adjustment Condition / ProcedureWaveform or others
1. Select the green monocolour screen with remote controller, and set the beam current to
1.6mA with the contrast control.
2. Degauss the CRT enough with the degaussing coil.
Note: Follow the job instruction sheet to ad-
just the magnetic field.
*BH = 0
*Bv = refer to the job intructions sheet.
3. The purity magnet must be previously set at
the zero magnetic field and the convergence
must be roughly adjusted.
With P-Mag, adjust it to the center: rank A.
4. Observe the points a, b, as shown in Fig.4-1
through the microscope. Move DY fore and aft
to set the landing at the point (rank A).
5. If the a/b balance is poor, compensate it to the
center "Rank AB".
6. Align it to zero, keeping the raster rotation in
the east direction.
7. Tighten up the deflection coil screws.
Tightening torque : 180 ± 20N (18 ± 2Kgf)
8. Checking the CRT corner area, bond the magnet sheet to set the landing at Rank A for compensation.
Note: Apply the adjustment after aging with the
beam current 1,600 ± 50µA or more for
30 minutes or more.
Note: Select the service mode, and press the
monocolour key of R/C for process, and
the monocolour screen (green) will be
selected.
* Every push of the monocolour key, changes the
screen as follows.
Monocolour
Screen
GREEN
* Adjustment for uniformity is change to another
content. Please refer to the following page.
Monocolour
Screen
BLUE
Monocolourscreen
Release
Monocolour
Screen
RED
a
90 mm90 mm
Fig. 4-1
A
Fig. 4-2 Rank A (On the right of CRT)
A
Fig. 4-3 Rank A (On the left of CRT)
* Continuosly press the
monocolour key 1 second or
more, and the monocolour mode
will be selected without the service mode.
b
A=B
B
B
A=B
29WF50
9-19-2
10
No.
Adjustment point
1 UNIFORMITY
ADJUSTMENT
(To perform
after the purity
and convergence
adjustment)
UNIFORMITY ADJUSTMENT
Adjustment Condition / ProcedureWaveform or others
Before adjustment begin, Horizontal magnetic
field=0G, Vertical magnetic field = 0.1G.
Make sure degauss it.
North Direction Red Uniformity
1. Horizontal mf = Set to monocolour screen Red
and adjust to +0.25G.
2. Pay attention to the edge of CRT, if the landing is poor, adjust by attaching the compensation magnet at the back of CRT . Refer to Fig.5.
South Direction Red Uniformity
1. Horizontal mf = Set to monocolour screen Red
and adjust to -0.25G.
2. Pay attention to the edge of CRT, if the landing is poor, adjust by attaching the compensation magnet at the back of CRT.
The same method is applied for adjustment of
monocolour screen Blue for blue uniformity, and
changing both the magnetic field for north and
south direction.
* During the pasting of compensation magent,
use the crosshatch pattern signal.
Make sure there is no blur or bend lines occur.
If the blur or bend lines are serious, adjust the
location of compensation magnet to make it
better.
(CRT surface)
(CRT back)
Compensation magnet
Miss landing
Fig.5
No.
Adjustment point
CONVER-
1
GENCE ADJ
(To be done
after the purity
adjustment.)
CONVERGENCE ADJUSTMENT
Adjustment Condition / ProcedureWaveform or others
(1)Receive E-2CH (the Crosshatch pattern).
(2)Using the remote controller, call NORMAL
mode.
Static Convergence Adjustment
1. Overlap blue and red with the open-/closing
angle and rotation of the 4 pole magnet.
2. Overlap green on blue and red with the open/closing angle and rotation of the 6 pole magnet.
Dynamic Convergence Adjustment
1. Fix the wedges in a position so that the deflection yoke neck is at the center of top bottom and left right. (Straight line and without
any blur horizontal / vertical line)
2. Adjust the Red, Blue, upper and lower of the
center y axis on the screen by using the Volume (YH,YHC) at the deflection yoke.
Refer to Fig. 6-2 and Fig. 6-3
3. If the Horizontal Red. Blue (XV) on the screen
center X axis is shifted, correct the Red. Blue
(XV) by adjusting the balance coil on the deflection yoke.
Refer to Fig.6-4.
4. After confirm that there is no problems on the
entire screen, bond wedge on CRT and glass
tape on it. Fastening the screws of DY and
magnet unit (purity, 4-pole and 6 pole), then
coat the lacquer paint on DY fastening screw
and magnet unit fastening screw.
Note:In case of poor convergence adjustment
on the top and bottom of the screen, adjust DY by swing rightward and leftward.
Refer to Fig.6-1
Y axis
B
R
Fig. 6-2
Adjust by YHC
B
R
Fig. 6-3
Adjust by YH
Fig. 6-4
Adjust by Balance Coil
29WF50
X axis
RB
RB
B
Adjust by swing DY
Note:For CRT drawing, please refer to following
page.
YHC
YH
10-110-2
Fig. 6-1
Balance Coil
6-Pole Magnet
Purity Magnet
Lacquer
4-Pole Magnet
CRT Neck
25 ± 0.5mm
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