Please notice the following before alignment and equipment
1. Don’t short any two soldering points, which should not be shorted and don’t touch any
components, which should not be touched.
2. Please pull out plug before equipment.
3. For safety reasons, all components equipped or replaced should be identical with BOM.
4. Must be warm up for 30 minutes or more and degauss CRT thoroughly with demagnetizer before
alignment.
The data of EEPROM must be stored before the adjustment for main chassis and EEPROM must be
corrected by the correct file 3Y03 ROM CORRECT.hex to avoid signal of CH6 weaken. R.bias,
G.bias, B.bias, R.drv, G.drv, B.drv should be set to proper values. Sub_bright is set to 63 usually.
Tools and equipments for adjustment
1. Small (-) screwdriver
2. Screwdriver without inductance
3. Pattern generator
4. DC Regulated power supply
5. Digital voltmeter
6. Sweep signal generator
7. 20MHz 2-Channel oscilloscope
Signal condition
ITEMS LOGO PICTURE
CARRIER
1 CH14 471.25MHz COLOR BAR NTSC/M MONO 1KHz
2 CH3 61.25MHz GRAY SCALE NTSC/M BTSC
1. Tuner AGC connects to GND. Pattern generator outputs 45.75MHz IF. Signal (70db V) and
connects to SAW filter output terminal through a capacitor.
2. Connect digital voltmeter across C227. DC regulated power supply positive terminal output +14V
to C617.
3. Adjust L203 coil to obtain 3.6V Digital voltage meter reading.
Note: To cancel this adjustment, L203 can be adjusted before inserted to the chassis with a special
equipment.
Model No: CT-21LS9MTS
Version 1.0
PATTERN SYSTEM SOUND
MODE
0.3K, 3KHz
5
B+ adjustment
1. Disconnect horizontal load. Connect a bulb (100W) AC 250V across C321.
2. Add 220V AC 50HZ to CN601 and switch on power switch.
3. Test the voltage with digital voltage meter between C321 two terminals.
4. Adjust VR601 to obtain +110V – 0.5V.
AGC alignment
1. Receive 60dB RF signal. Connect digital voltmeter positive terminal to tuner AGC terminal and
negative terminal to GND.
2. Press MENU key, then press Q.VIEW key, MUTE key in turn on telecontroller. TV SET will go to
factory mode. Press TIMER key to go to the next factory menu. Go to MENU5 status by this
means. Press MENU key to exit factory mode.
3. Select RF.AGC by pressing CH+ and CH- keys. Adjust VOL+ and VOL- keys to obtain 4V digital
voltage meter reading.
Model No: CT-21LS9MTS
Version 1.0
6
COMPLETE MACHINE GENERAL ADJUSTMENT
Go to factory mode according to 4-2-2 before warm up line Focus adjustment
1. Receive monoscope pattern.
2. Set TV to work in dynamic status.
3. Adjust the focus knob of FBT to get the clearest picture.
Screen voltage adjustment
1. Check the R.bias, G.bias, B.bias, R.drv, G.drv, B.drv and sub_bright. Go to factory mode MENU2
status according to 4-2-2. Usually G.bias should be same as the value of auto white balance
equipment. And SUB_BRIGHT is 63.
2. Set Cross_BW 3. Then the picture will be a white +. Cross_BW is in factory menu 3.
3. In menu 5, select SUBB.ADJ and set it to 1. Adjust the screen knob of FBT to get a faintness +.
4. Restore the SUBB.ADJ to 0 and CROSS.BW to 0.
White balance adjustment (Applied in factory)
1. Set TV AV status in custom mode (or other mode need for the adjustment). Receive black white
pattern.
2. Insert six-row-wire into CN002. Press adjustment keys and then go to automatic white balance
adjustment.
3. PIN DISCRIPTION OF CN002:
1●●SDA●●2●●SCL●●3●●GND●●4●●GND●●5●●SCL●●6●●SDA
4. After adjust well, pull out six-row-wire.
White balance adjustment (Applied when servicing)
1. Set TV AV status and receiv GREY SCAL.
2. The one sampling tube of CRT color analyzer (CA-100) covers on GREY signal and the another
covers on white signal.
3. Go to factory mode MENU2. Obtain GREY signal X=281 and y=311 by adjusting R-CUT and Bcut. Obtain white signal X=281 and y=311 adjusting R-DRV and B-DRV. Obtain both X=281 and
Y=311 by adjusting the two status repeatedly.
Sub_Bright adjustment
Receive the grey scale. Get into the menu5 of factory mode. Set SUBB.ADJ to 1. Then adjust the
SUB.BRI option to get a scale to be seen a little brightness (only two rows can be seen).
Vertical size and Pin Cushion adjustment
1. Receive monoscope pattern. Set TV standard status. Adjust V.size to obtain pictures vertical
redisplay ratio mode than 90% in factory mode MENU1.
2. Receive cross hatch pattern. Set TV standard status. Adjust V.LINE and V.SC to obtain picture
vertical pin cushion a good status in factory mode MENU1.
3. Receive cross hatch pattern. Set TV standard status. In factory mode MENU1 adjust V.POS to
obtain pictures vertical center at the center of CRT screen.
Horizontal Center adjustment and horizontal position of OSD adjustment
1. Receive monoscope PATTERN. Set TV standard status. Adjust H.PHASE in menu 1. to obtain
horizontal center at the center of CRT screen.
2. Adjust OSD.HPOS to get right display position.
Model No: CT-21LS9MTS
Version 1.0
Purity Magnet
RB-G RB
Magnet Clamper
Static Magnet
7
SUB.TINT adjustment
Receive the color bar signal of NTSC system. Set the picture mode at normal mode. Adjust the
SUB.TINT option in menu 5 at service mode to get the right hue.
MTS adjustment
Receive the RF CROSS-TALK signals but FM with BTSC. Enter into the factory mode. Set ADJ.
FREQ to 1 in 9852 AUTO.ADJ. wait 1 second. Quit factory menu after ADJUSTING change to 0.
Color purity adjustment
1. Before color purity adjustment, warm up the TV set over 15 minutes and fully degauss.
2. Receive pure white signal in AV status and set the TV receiver dynamic.
3. Go to factory mode MENU2. After write down the values of R-BIAS and B-BIAS, set the values
of R-BIAS and B-BIAS zero.
4. Loosen the clamp screw of the deflection yoke and pull the deflection yoke towards color purity
magnetic loop.
5. Adjust color purity magnetic loop to make the green area at the center of CRT screen.
6. Slowly push the deflection yoke toward the front of CRT and set it where a uniform green field is
obtained. Tighten the clamp screw of the deflection yoke.
7. Restore the value of R-BIAS, G-BIAS and B-BIAS.
Convergence adjustment
1. Receive a dotted pattern. Set the TV receiver dynamic.
2. Loose the convergence magnet clamper and align red with blue dots at the center of the screen by
rotating (R,B) static convergence magnets.
3. Align Red /Blue with green dots at the center of the screen by rotating (RB-G) static convergence
magnet.
4. Remove the DY wedges and slightly tilt the deflection yoke horizontally and vertically to obtain
the good overall convergence. Fix them after the good overall convergence got.
5. If purity error is found, follow PURITY ADJUSTMENT instructions.
Model No: CT-21LS9MTS
Version 1.0
8
FACTORY MENU DISCRIPTION
MENU1 VALUE DISCRIPTION
1 V.SIZE 101 Align vertical amplitude
2 V.POS 32 Align vertical DC bias
3 V.LINE 16 Align vertical linearity
4 V.SC 0 Align vertical S-correction
5 H.PHASE 8 Align sync to flyback phase
6 H.BLK.RL 4 H-blanking control (width /phase
7 H.FREQ 22 Align ES Sample horizontal frequency
MENU2 VALUE DISCRIPTION
1 V,KILL 0 Disable vertical output
2 R.B 138 Align Red out DC level
3 F.B 182 Align Green out DC level
4 B.B 148 Align Blue out DC level
5 R.D 67 Align Red out AC level
6 G.D 8 Align Green out AC level
7 B.D 45 Align Blue out AC level
4~7/ no filt)
2 CORING 1 Enable luminance coring (0/ OFF; 1/ ON)
3 OSD.CONT
4 OSD.HPOS 30 Align the horizontal position of OSD
5 BLK.STR.D 0 Disable black stretch
6 BRIABL.T 0 Align brightness ABL threshold
MENU5 VALUE DISCRIPTION
1 RF.AGC 31 Align RF AGC threshold
OPTION VALUE DISCRIPTION
1 2AV.CH 3 Select AV numbers (0/ No AV; 1/1 AV; 2,3/2AV)
2 SRH.SPEED 0 Select auto search speed (0/ fastest, 7/ lowest)
3 TDA9852 1 Disable 9852 (0/disable; 1/able)
4 TUN.AS.V 1 Select the Tuner address (0/ Tuner pin3 to ground; 1/pin3
not used)
Model No: CT-21LS9MTS
Version 1.0
9
9852
1 ADJ.FREQ 0 Disable auto adjusting (0/disable; 1/get into auto adjust
2 ADJUSTING 0
3 FM.LVL 16
4 76075.VOL 0
5 L3-L0 0 Input level adjust
6 TC2-TC0 0 Timing current alignment data
7 A14-A10 0 Stereo alignment data for wideband expander
8 A24-A20 0 Stereo alignment data for spectral expander
TDA1 VALUE DISCRIPTION
1 VOL.RIGHT 125 Volume control right
2 VOL.LEFT 125 Volume control left
3 GMU 0 Mute control for all output (general mute)
4 AVLON 0 Auto volume control (with 0.1Vrms –1.1Vrms input to
5 LOFF 0 Switch loudness on/off
6 CCD 0
7 SC2-SC0 2 Selection between line in and line out
8 SAP.ID 0
TDA2 VALUE DISCRIPTION
1 STERO.ID 1
2 TZCM 0 Zero cross mode in volume operation
3 LMU 0 Mute control for line out
4 EF2-EF0 0 Selection between mono, stereo linear, spatial stereo and
5 L3-L0 0 Input level adjust
6 A14-A10 0 Stereo alignment data for wideband expander
7 A24-A20 0 Stereo alignment data for spectral expander
8 STS 0 Stereo level switch
TDA VALUE DISCRIPTION
1 ADJ 0 Stereo adjust on/off
2 AT1-AT2 0 Attack time at AVL
3 TC2-TC0 0 Timing current alignment data
4 WR.ERR 0
5 RD ERR 0
6 MANU ADJ 0
7 STEREO 0 Mode selection for line out
8 SAP 0 Mode selection for line out
* Please keep AC cord unplugged when connecting TV system
Note:
This is a mono CTV even though there are R & L audio input & output jack. These audio R/L input
terminals are parallel connected inside and make mixed monaural sound output. There are some
monaural audio output come from R/L output terminals.
Model No: CT-21LS9MTS
Version 1.0
VIDEOVIDEOAUDIOAUDIO
OUTIN
(STEREO)
AV-OUT
R
AV-IN
LL
VIDEOVIDEOAUDIOAUDIO
R
(MONO)
13
MECHANICAL DISASSEMBLIES
Cabinet back removal
1. Refer to figure 1, remove 9 screws.
2. Pull off cabinet back and remove.
Chassis removal
1. Remove cabinet back.
2. Discharge the picture tube anode (2
3. Disconnect degaussing coil socket (KE), picture tube socket, deflection yoke connector (KDY),
speaker connectors (KL) and (KR) and 2
4. Remove chassis completely by sliding it straight back.
Model No: CT-21LS9MTS
Version 1.0
nd
anode lead) to the dag coating (picture tube grounding lead).
nd
anode lead.
14
Picture tube removal
Caution: Do not disturb the deflection yoke or magnet assembly on the picture tube neck. Care must be
taken to keep these assemblies intact unless picture tube is being replaced. Discharge the picture tube to
the coating before handling the Tube.
1. Remove chassis, referring to chassis removal instructions.
2. Place cabinet front face down on the soft surface.
3. Remove the screw on each corner of the picture tube and GENTRLY lift the picture tube out of the
cabinet.
4. Install a replacement picture tube in reverse order. Properly install the degaussing coil and picture
tube grounding lead on the picture tube.
Note: If the picture tube is being replaced, mount the degaussing coil on the picture tube. See
following.
DEGAUSSING
COIL
DEGAUSSING
COIL SOCKET
DEGAUSSING
COIL HOLDER
PICTURE TUBE
GROUNDING LEAD
To CRT Unit
ground
Model No: CT-21LS9MTS
Version 1.0
15
CABINET PARTS LIST
6
Key No Part No. Description
1 SK140121NZM001(2) Speaker grille (L&R)- silver blue #Sb001 (PVC)
2 SK100121NZM002 Front cabinet- metal silver grey #MSG001 W/AV (O-R-
3 SK100721NZM002 Front lens (remote control window)
4 SK100721NZM002 Front lens (LED window)
5 SK190100821210 Power knob spring –DIA 0.6 spring wire
6 SK100425TM0002 Side AV jack bracket – dark grey #DG001(ABS)
7 SK100821NZM001 Control key knob- electro plating silver (ABS)
8 SK060121NZM001 Back label ENG
9 SK100221NX0001 Back cabinet – dark grey #DG001
10 SK1015HS080002 Bottom cabinet- normal grey #NG001 (ABS)
11 SK1016HS080003 Battery door – normal grey #NG001 (ABS)
12 SK1014HS080012 Top cabinet – normal grey #NG001 (ABS)