akira CT-14TA9CP User manual

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Model No: CT-14TA9CP
Version 1.0
2
CHASSIS: SS1
MODEL:
CT-14TA9CP

Model No: CT-14TA9CP
Version 1.0
3
CONTENTS
Specifications .........................................................………………………….4
X-Ray Radiation Precaution ……………………………………………………5
Safety Precaution ………………………………………………………………. 5
Product Safety Notice …………………………………………………………. 5
Alignment Instructions …………………………………………………………. 6
Schematic Diagram ……………………………………………………………. 12

Model No: CT-14TA9CP
Version 1.0
4
SPECIFICATIONS
RECEIVING SYSTEM
Sound System : A = BG/DK/I/M, R, N = BG/DK/I, CP = BG
Colour System : A = PAL/SECAM/NTSC/NTSC P/B
R.N = PAL/SECAM/NTSC P/B
CP = PAL/NTSC P/B
Picture Tube : 14” = 37cm diagonal
Ext. Antenna : 75 Ohm Coaxial Cable
Ext. In/Out : Audio/Video-in/out
Speakers : 5Wx 2
Volts : A = AC100 ~ 260V 50/60Hz
R,N,CP = AC150 ~260V 50/60Hz
Power Consumption : 14” = 65W
Dimension : 14” = 401(W) x 365(D) x 345(H) mm
Net Weigh : 14” (10 kg)
REMOTE CONTROL
Transmitting System : Infra-red
Power Supply : DC 3V (1.5Vx2)
Design and specifications are subject to change without prior notice

Model No: CT-14TA9CP
Version 1.0
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CAUTION
Before serving the chassis, read the “X-Ray Radiation Precaution”, “Safety Precaution” and
“Product Safety Notice” on this page.
X-RAY RADIATION PRECAUTION
1. 1.Excessive high voltage can produce potentially hazardous X-Ray Radiation. To avoid such
hazards, the high voltage must not be above the specified limit. The normal value of the high
voltage of this receiver is 24KV at zero beam current (minimum brightness) under 220V AC
power source. The high voltage must not, under any circumstances, exceed 30KV.
2. Each time a receiver requires service, the high voltage should be checked following the High
Voltage Check procedure in this manual. It is recommended the reading of the high voltage
should be recorded as a part of the service record. It is important to use an accurate and reliable
high voltage meter.
3. The primary source of X-Ray Radiation in this TV receiver is the picture tube. For continued X-
Ray Radiation protection, the replacement tube must be exactly the same type tube as specified
in the part list.
4. Some parts in this receiver have special safety –related characteristics for X-Ray Radiation
protection. For continued safety, parts replacement should be undertaken only after referring to
the Product Safety Notice.
SAFETY PRECAUTION
Warning: Service should not be attempted by anyone unfamiliar with necessary precaution on this
receiver. The following are the necessary precautions observed before servicing this chassis.
1. Since the power supply circuit of this receiver is directly connected to the AC power line, an
isolation transformer should be used during any dynamic service to avoid possible shock hazard.
2. Always discharge the picture tube anode to the CRT conductive coating before handling the
picture tube. The picture tube is highly evacuated and if broken, glass fragment will be violently
expelled. Use shatter proof goggles and keep picture tube away from the unprotected body while
handling.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put
back in place, such as: non-metallic control knobs, insulating covers, shields, isolation resistor-
capacitor network etc.
4. When replacing parts or circuit boards, disconnect the power cord.
5. When replacing a high voltage resistor (Metal oxide film resistor) on circuit board, keep the
resistor 10mm (1/2in.) away from circuit board.
6. Connection wires must be kept away from components with high voltage or high temperature.
7. If any fuse in this TV receiver is blow, replace it with the FUSE specified in the chassis part list.
8. The receiver is designed to operate with 220V(50/60Hz) AC mains.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety –related characteristics. These
characteristics are often passed unnoticed by a visual inspection and the X-Ray Radiation protection
afforded by them cannot necessarily be obtained by using replacement components rated for high
wattage, etc. Replaced parts which have these special safety characteristics are identified in this manual
and its supplements, electrical components having such features are shaded on the schematic diagram
and the part list.
Before replacing any of these components, read the part list in this manual carefully. The use of
substitute replacement parts, which do not have the same safety characteristics, as specified in the part
list may create shock, fire, and X-Ray Radiation or other hazards.

Model No: CT-14TA9CP
Version 1.0
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ALIGNMENT INSTRUCTION
(A) MAIN CHASSIS ALIGNMENT INSTRUCTION
1. Equipment requirement:-
1.1. Colour Television signal generator or Central TV signal generator
1.2. IF alignment –Philips Gen. 5418 or 5518
1.3. Scope 20 MHz –2 channels types
1.4. Digital multi-meter with LED display 4 digits
1.5. Factory mode remote control unit
2. Channels setting required:-
Channel -1 Monoscope pattern PAL DK Music
Channel -7 Half Colour Bar pattern PAL I Modulation
Channel -12 Crosshatch pattern PAL BG Music
Channel -13 Picture PAL DK Music
Channel -24 Half Colour Bar pattern PAL BG Modulation
Channel -56 Full Colour Bar pattern NTSC Modulation
3. Set-up Alignment:-
38 Mhz IF
Signal Gen Scope 20Mhz
Digital Multi-
meter
C137 +
T101
C561+
Tuner
LA76810A-IC
IF GND

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Version 1.0
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4. B+ Voltage Alignment:-
4.1. Set and connected all the points.
4.2. Locate the RP551 alignment VR location.
4.3. Use digital multi-meter to measure the B+ voltage.
4.4. Switch on the TV chassis and connect by Philips pattern for alignment.
4.5. Align the Rp551 VR with the digital multi-meter to the required spec voltage110 Volt +/-
0.5V,(14”&21”) and 129.5Volt +/-0.5V (25”/29”/34”).
4.6. Alignment finished, apply glue onto RP551 VR. After glue re-check the B+ voltage to ensure
the B+ voltage is within spec of 110V(14”&21”) and 129.5Volt(25”/29”/34”).
5. Alignment Mode and Factory Setting:-
5.1. Switch on the TV chassis and change to AV mode position.
5.2. Press “Factory mode” key to enter “ factory alignment mode”. Use “CH +/-“ to select the
alignment item, and use “V +/-“ keys to do adjustment to you requirement.
6. IF Voltage Adjustment:-
6.1. Setting-up –set-up the Philips 5418/5518 pattern generator, AV out frequency to 38MHz,
signal level to 70dB +/-2 dB.
6.2. IF set-up 38MHz signal connected with coaxial cable with 1 capacitor of “0.01uF” and
connect to main chassis IF” / ground points.
6.3. Tuner must not insert with the antenna.
6.4. Switch on TV chassis, adjust the IF coil “T110” and check the Ch 2 brightness line for the
range change from 0 to 5V. Readjust the voltage to meet Ch 1 position.
Note: LA76810A alignment only on VCO (T110) not others.
7. Vertical Line –Pin–Cushion Adjustment :-
7.1. Receive Channel 7 colour bar.Adjust the PR301 for vertical lines pin-cushion to 1 straight
line, adjust the PR302 for horizontal phase to spec requirement.
8. Vertical Line and Size Adjustment:-
8.1. Receive crosshatch pattern, use factory mode remote control to press “factory mode” key
for adjustment. Using CH +/-keys for V. Size and V. Line selection.
8.2. Use V +/-keys to adjust the picture line requirement and the size to spec.
9. RF AGC Adjustment:-
9.1. Receive channel 13 of picture pattern. Adjust the AGC at 60 dB for no picture noise. 100 dB
–picture should not be distorted and the VOS do not have unstable condition.
10. Checking the Electrical Function:-
10.1. Connect the power cord and connect the signal to RF input.
10.2. Check the power supply whether OK or not. Switch on the TV set and the LED is on. Switch
off the TV screen and should not have CRT spot within 3 sec.
10.3. Receive the channel 1 for monoscope pattern to check the picture focus and the round circle
should not be distorted. The Centre position, and VOS line/size are within spec. Check the
brightness, contrast and colour condition. Check the convergence, picture must be clear,
focus OK and white balance are OK. Also check the complete screen picture quality. High
voltage condition OK and the Screen picture must be OK.
10.4. Check all the functional keys must be working well.
10.5. Receive colour pattern signal and the system colour. (PAL/SECAM/NTSC) Check the power
main on/off switch, brightness, volume, colour, contrast and tint. The picture quality must not
have colour noise, unbalance size and distorted condition.
10.6. Check the sound quality standards, Volume up/down are OK to spec, and sound output.
Ensure the sound output is not distorted and noisy. No interference for DK/BG/I/M.
10.7. Use remote Control Unit for all types of function check and ensure OK.
10.8. Check the words display condition.
10.9. Shock test and make sure the picture and sound are not distorted and shifted.

Model No: CT-14TA9CP
Version 1.0
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10.10. Use strong and weak signal to check the colour picture condition. After adjust the signal
level to 35-40 dB and the colour should not gone. The picture and sound must be OK. At 60
dB the picture should not have snow noise.
10.11. Ensure the factory mode setting are set. Set-off the factory mode function and last switch
off the TV set.
10.12. All the “NG” sets must send for repairing and recording for reference.
10.13. Check the AV input and output the picture and sound must be OK.
11. Reliability Aging Test:
11.1. 1st lot of production sets. Sampling 20 sets for aging 7 days continues test with colour signal
in. Normal production sets must be age for 1 day.
12. Mechanical Inspection:-
12.1. Inspect all glue are firmly placed.
12.2. Check all screws are tightened, no missing and loose.
12.3. Check all the connectors are fully located onto the chassis base.
12.4. Check all the safety components are firmly located onto the chassis and no damage.
12.5. The TV internal side should not see any excess metal materials.
12.6. Check all the cable and wire are OK in-used.
12.7. Check the FBT and switching transformers not high mounting. The big capacito are not
slanting and high mounting.
13. High Potential Testing:-
13.1. Set the mega-meter is set in position.(Insulation tester)
13.2. Set the meter to DC500V.
13.3. Use the meter probe onto the tuner body and the power cord on connector socket.
13.4. Switch on the button and test the insulation performance and the reading at 2/3 position.
13.5. Insulation spec must over 9.0 Mohm. if not reject.
Note: Everyday work check the high pot. Condition as 3100V, 10 mA, 5 sec are OK.
14. Safety Check:-
14.1. High voltage checking. Use high pot tester and set the tester to 3100V, 10mA and ensure the
AC/DC switch is in AC position. Set the tester to 10mA and timer to 5 sec.
14.2. Checking methods.
14.2.1. connect the power cord into power socket.
14.2.2. the high pot tester gun pointed at metal part of TV set body.
14.2.3. switch on the switch to test the high electric power.
14.2.4. connect with high voltage within 5 second and remove the tester gun point.
(B) CTV SET ALIGNMENT -FACTORY SERVICE MODE
1. “Enter” and “Leave” the Factory mode adjustment methods:
1.1. Enter factory password: (use normal Remote control unit)
1.1.1. Set TV as RF condition and press remote control “PROG” key and follow by “6”, “4”, “8”,
“3”
1.1.1.1. Repeat the same step of “1.1.1.” to enter into “White Balance” adjustment
condition
1.1.1.2. Repeat the same step of “1.1.1.” to enter into “Factory mode” adjustment
condition
1.1.1.3. Repeat the same step of “1.1.1.” to enter into “Factory mode” setting condition
1.1.1.4. Repeat the same step of “1.1.1” to leave the factory mode function

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2. Direct Enter:
2.1. Use Factory mode Remote control unit, press the “factory” key to enter into “factory mode”
function. Press one more time “factory” key to enter “White balance” adjustment condition,
press one more time to enter the adjustment condition. Press One “factory” key to setting up
our requirement spec. Last press once “factory” key to leave factory mode function.
Use “factory mode” for TV ageing, 2nd step is to align the White Balance in good condition. 3rd step
adjust the required electrical specification. (The function adjustment are 20 selection) Others function
of adjustment are 39 items, and you can use “P+/P-“ key and “V+/V-“ key for selection and
adjustment.
1. Setting of company logo:
1.1. Switch on the TV set and set the TV in AV mode, Press Remote control “DISP” key and the
TV screen will display “AV” and follow by presetting the Numeric key “6”, “4”, “8”, “3” to
enter the company logo setting.
1.2. Press the “P+/P-“ key for selection of function and press “V+/V-“ key for adjustment. Press
“>*<-“ key to change or select your requirement.
1.3. Logo setting 1st row that come with 4 kinds of setting:
1.4. Logo setting 2nd row that come with 2 kinds of setting:
1st turn off the display, 2nd turn on the display (display the word setting of maximum 10
words).
1.5. When the 2 rows of words are display on the TV screen, and you can check the words
positioning. Not too lose to each other or the words are not clear to display on the screen. Re-
set the logo words from the logo setting factory mode.

Model No: CT-14TA9CP
Version 1.0
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FACTORY MODE ADJUSTMENT TABLE
Table 1
Selection
Items OSD Display Setting Description 14” 14”/21” 25”/29” 34” Reading limit
00 H.PHASE Horizontal centre 79760-31
01 NT.PHASE NTSC center setting 2000-5 -+ 16
02 H.BLK.LEFT Horizontal left adjust 4440/1
03 H.BLK.RIGHT Horizontal right adjust 4440/7
04 V.SIZE Vertical size 52 82 88 83 0 -127
05 V.LINE Vertical Linearity 11 13 16 14 0 -31
06 V.POSI Vertical position 24 23 23 25 0 -63
07 V.SC Vertical SC adjust 0000 -31
08 NT.V.SIZE NTSC Vertical size 6000-31 -+32
09 NT.V.LINE NTSC Vertical line 1000-15 -+16
10 NT.V.POST NTSC Vertical position 10 000-31 -+32
11 NT.V.SC NTSC Vertical SC 2000-15 -+16
12 RF.AGC RF AGC adjustment 23 26 26 26 0 -63
13 VOLUME
OUT Sound output 128 108 108 108 0 -127
14 SUB. CONT Contrast 23 26 26 26 0 -31
15 SUB.
COLOUR Colour 30 30 30 0 -63
16 SUB. SHARP Sharpmness 8880 -31
17 SUB.TNT TINT Colour 16 26 26 26 0 -63
18 OSD.CONT OSD Contrast 56 60 60 60 0 -127
19 OSD. H.POSI OSD left/right 36 30 30 30 0 -127
20 OSD.V.POSI OSD up/down 17 12 12 12 0 -31

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Version 1.0
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Table 2
Selection
Items OSD Display Setting Description 14” 14”/21” 25”/29” 34” Reading limit
00 BLK…STR.DET Black strick detect 0000/1
01 AFT.GAIN AFT improvement 1110/1
02 V.SETUP Vertical set-up 1110/1
03 CD.MODE VOS standards 0000-7
04 GRAY MOD Internal gray mode set
0:100%, 0:50% 0000/1
05 B.GAM.DEF Blue Gam selection 3330-3
06 RG.GAM.SEF Blue Gam adjustment 0000/1
07 BRIGHT
ABL.TH ABL setting, 0-start, 7- late 5550-7
08 EMG.ABL.BEF Emergency on/pff, 0-
ON, 1-OFF 0000/1
09 BRT.ABL.DEF ABL ON/OFF, 0-ON,
1-OFF 0000/1
10 MID.STP.DEF Brightness detection 0000/1
11 R-Y/B-Y G.BL R-Y/B-Y improvement 8880-15
12 T-Y/B-Y ANG R-Y/B-Y adjustment 8880-15
13 SECAM B-Y
DC SECAM B-Y DC adjustment 8880-15
14 SECAM R-Y
DC SECAM R-Y DC adjustment 8880-15
15 SND TRAP Colour trap filter
control 4440-7
16 VOL FIL Sound trap filter control 1110-3
17 VIF SYS SW VCO setting 10000-7
18 VIDEO LEVEL Video output
adjustment 7770-7
19 FM LEVEL Sound output
adjustment 16 16 16 0-31
20 POWER
OPTION Power on selection 01110/3
21 LOGO AT P.
ON Logo display 1110/1
22 SEARCH
CHECK Check the auto search function 1110/1
23 BAND OPTION Band selection 0000-3
24 CHANNEL
MAX Maximum channel selection 254 254 254 254 0-254
25 AV OPTION AV input selection 22220-3
26 POSITION L/R Channecl OSD display
position 11110/1
27 BLUE BACK No signal Blue screen
selection 11110/1
28 BLACK BACK Channel screen in black
selection 11110/1
29 STEREO
OPTION Stereo selection 11110/1
30 STEREO IC Type of stereo IC used 0000/1
31 WOOF
VOLUME Woofer selection 0000/1
32 SIF 4.5M Set 4.5 sound 1110/1
33 SIF 5.5M Set 5.5 sound 1110/1
34 SECAM Select Secam system 10000/1
35 CHINESE OSD Chinese/English
selection 01110/1
36 SENSITIVITY Receive sensitivity 0000/1
37 CUT MODE Cut picture mode 1110/1
38 V MUTE OFF Turn off Screen black
screen display 10000/1