Service Manual DVD-COMBO TV D5
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CONTENTS |
PAGE |
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Safety Instructions |
3 |
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Technical Specifications |
4 |
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Special Features |
5 |
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Remote Control |
6 |
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Preperations |
7 |
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Operating the TV |
8 |
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Block Diagram of D5 Chassis |
13 |
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IC Datasheets&Specs |
14 |
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Pin Voltages of IC’s |
23 |
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Oscillograph of Some IC |
26 |
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Electrical and Service Adjustments |
29 |
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Channel Frequency Tables |
32 |
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Part List |
34 |
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Circuit Diagrams |
Attached |
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1. SAFETY INSTRUCTIONS
GENERAL GUIDELINES
1.It is advised to insert an isolation transformer in the AC supply before servicing a hot chassis.
2.Potentials as high as 33KV are present when this receiver is in operation. Operation of the receiver without the rear cover involves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by any one who is not competent with the precautions necessary when working on the high voltage equipment. Always discharge the anode of the tube.
3.When servicing observe the original lead dress in the high voltage circuits. If a short circuit is found, replace all the parts which have been overheated or damaged by the short circuit.
4.Always use the manufacturer’s replacement safety components. The critical safety components marked with 
on the schematics diagrams should not be replaced by other substitutes. Other substitute may create the electrical shock, fire or other hazards. Take attention to replace the spacers with the originals. Furthermore where a short circuit has occurred, replace those components that indicate evidence of overheating.
5.After servicing, see that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C combinations are correctly installed.
6.When the receiver is not being used for a long time of period of time, unplug the power cord from the AC outlet.
7.After servicing make the following leakage current checks to prevent the customer from being exposed to shock hazard.
LEAKAGE CURRENT COLD CHECK
1.Unplug the AC cord and connect a jumper between the two prongs of the plug.
2.Turn the receiver’s power switch on.
3.Measure the resistance value with an ohmmeter, between the jumpered AC plug
^
and each exposed metallic cabinet part on the receiver, such as screw heads, aerials, connectors, control shafts etc. When the exposed metallic part a return path to the chassis the reading should be between 4Mohm and the 20Mohm. When the exposed metal does not have a return path to the chassis, the reading must be infinite.
LEAKAGE CURRENT HOT CHECK
1.Plug the AC cord directly in to the AC outlet. Do not use an isolation transformer for this check.
2.Connect a 2Kohm 10W resistor in series with an exposed metallic part on the receiver and an earth, such as a water pipe.
3.Use an AC voltmeter with high impedance to measure the potential across the resistor.
4.Check each exposed metallic part and check the voltage at the each point.
5.Reverse the AC plug at the outlet and repeat each of the above measurements.
6.The potential at the any point should not exceed 1.4 Vrms. In case a measurement is outside the limits specified, there is the possibility of a shock hazard, and the receiver should be repaired and rechecked before it is returned to the customer.
HOT CHECK CIRCUIT
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AC-Voltmeter |
TO INSTRUMENTS |
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EXPOSED |
Water pipe |
METALLIC PARTS |
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(earth) |
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2 K Ohm |
Figure 1
X-RAY RADIATION WARNING
The primary source of X-ray radiation in this receiver is the picture tube. The chassis is specially constructed to limit X-ray radiation. For continued X- ray radiation protection, replace the tube with the same type of the original one.
CAUTION
AFTER REMOVAL OF THE ANODE CAP, DISCHARGE THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE CARBON PAINTED ON THE CRT WITH A HIGH VOLTAGE PROBE AND MULTIMETER (SELECT VDC) AND THEN SHORT CIRCUIT DIRECTLY TO DISCHARGE COMPLETELY.
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2. TECHNICAL SPECIFICATIONS |
^ |
Power source |
:230-240 VAC, 50Hz |
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Power consumption |
:55 W |
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Standby power consumption
Aerial impedance
Receiving system
Receiving channels
Audio outputs
High Voltage :
Focus voltage :
Grid 2 voltage :
Heater voltage :
Video/Audio Terminals :
Operating temperature :
Safety |
: |
X-Ray radiation |
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:2 W
:75Ohm, coaxial type
:PAL BG
PAL SECAM BG
PAL SECAM BG DK/DK’ PAL SECAM BG LL’ PAL I
:VHF BAND I , |
CH2-4 |
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VHF BAND III , |
CH5-12 |
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CABLE TV |
S1-41 |
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UHF BAND |
CH21-69 |
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:2 x 5W RMS at %10 THD (For 14”) |
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28.5 ± 0.5 KV |
25”, 28”4/3 |
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29.0 ± 0.5 KV |
28”16/9, 29”, 32” Super Flat |
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29.5 ± 0.5 KV |
32” Pure Flat, 33” |
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%25.6 ± %38 of EHT |
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0-1400 V |
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6.2 ± 0.2 Vrms |
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AV1/2 IN |
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Video : 1 Vpp,75 Ohm |
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Audio : 0.5 Vrms, >10 Kohm |
AV1 IN |
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RGB |
AV1/2 OUT |
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Video : 1 Vpp, 75 Ohm |
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Audio : 0.5 Vrms, <1 Kohm |
AV2 IN (RCA) |
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Video : 1 Vpp, 75 Ohm |
Audio : 0.5 Vrms, >10 Kohm
0-45 Degrees
IEC 65 /BS P2N
ACC. IEC 65/BS P2N
1: 20W should be added to find the max. power consumption of the models with subwoofer.
2: TV set is produced to receive “one” of these colour and sound systems.
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3. SPECIAL FEATURES |
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•Automatic tuning system with country selection.
•100 Programme Memory
•Available for Cable Channels (A decoder maybe required)
•Manual Fine Tuning
•Child Lock
•Return to the last channel viewed (SWAP)
•Surround Sound Effect
•16:9 picture format
•Sound adjustment using one button (Smart control).
•Automatic Volume Limiting
•Your TV set is equipped with an On-Screen Display system. This system enables the user to see the function on-screen and to control them efficiently.
•Infrared Remote Control
•Your TV will automatically switch off if it’s been programmed from 5 to 120 minutes, and it will automatically switch to Stand by five minutes after a channel ceases to transmit.
•Multi language menu system
•Headphone socket
•Scart Socket: Video cassette recorder, satellite receiver, video disc player,DVD, TV games or a home computer can be connected to this AV socket with an appropriate connecting cable.
•Naming the channels
•Teletext reception
•S-Video connection (*)
•Audio/Video RCA sockets (*)
•4:3 / 16:9 / Letterbox format
•Dolby Digital Sound
•DVD/DVD-R/DVD-RW/VCD/S-VCD/CD AUDIO/CD-R / CD-RW
•MP-3 Playback
•Zoom
•Coaxial audio out
•Optical audio out (*)
•AV Stereo
•Repeat
•Subtittle
•Go to
•(*) : These features are not available in all models.
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4. REMOTE CONTROL |
^ |
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5. PREPARATIONS |
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MAIN SUPPLY CONNECTIONS
Connect the TV mains plug into your domestic mains socket outlet (230 V 50Hz AC).
Press the Program up, Program down button or Numeric Buttons on the remote handset to switch the TV on.
AERIAL CONNECTION
Using a 75Ω aerial lead connect your TV to the aerial outlet in your home.
BATTERY FITTING
Insert the 2 AAA Batteries supplied into the compartment on the rear of the remote control, ensure you follow the polarity diagram inside the compartment.
PIN CONNECTIONS FOR SCART SOCKET
1- Audio output Right |
11- RGB input, Green |
2- Audio input Right |
12- |
3- Audio output Left(Mono)13- Red ground |
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4- Audio ground |
14- Ground |
5- Blue ground |
15- RGB input, Red |
6- Audio input Left(Mono) |
16- Blanking Signal |
7- RGB input, Blue |
17- Video output ground |
8- Switching voltage |
18- Video input ground |
9- Green ground |
19- Video output |
10- |
20- Video input |
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21- Screening |
CONNECTING TV WITH VIDEO AND SATELLITE/DIGITALRECEIVER
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6. OPERATING YOUR TV
TV controls
Programme selection
Press the + or - buttons on the TV or remote control or press a Numeric button to select a programme.
To select a programme whose number is greater than 9 using the numeric buttons, press the -/-- button first and then press the two Numeric buttons. For example, to select programme 12, press the -/-- button followed by 1 and then 2.
You can also select a program by pressing in the OK button.
Press the OK button and a blue box will appear on the screen with programme numbers on it.
Use the Program ▲ andProgram ▼ buttons to scroll through the programme numbers. When you find the program number you want press the OK button again.
Press the TV/TX or TV MENU button to close the blue box.
Volume
Press the Volume + or Volume – button on the TV or the VOL+ or VOLbutton on the remote control. A sound level bar will appear on the screen.
Mute
To mute the sound press the Mute button on the remote control. A loudspeaker symbol will appear on the screen.
Press the Mute button again to restore the sound. The symbol will disappear. Pressing VOL+ buttons will decrease the volume without restoring. But
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pressing the VOLbutton will increase the volume without restoring.
Swap
Allows you to swap between the program you are watching and the last selected program. i.e. If you were watching Program 1 and change
to Program 11, press the Swap button to go back to Program 1. Press it again to return to Program 11.
Info
Press the P100 button and the program number and program name will be displayed for a few seconds.
AV
For use when you are connecting an external source to your TV (Video recorder,
DVD player etc.) via the SCART socket or RCA sockets. See ‘Connecting external equipment’.
Press the AV button to select your input as follows:
1 Scart models:
1 AV1 when using SCART socket 1.
2 AV2 when using the RCA sockets of the TV.
(Optional)
3 AV2-S when using the S-video socket and RCA audio sockets of the TV. (Optional)
Press the AV button again to return to TV.
Tuning the television
There are two ways of tuning your television: Manual, where you control the tuning process or Autoprogram where the television does it all automatically.
Please Note
If the TV is set to a channel with no signal the
TV will return to standby after 5 minutes. The time remaining is displayed on the screen.
Manual tuning
Tuning the TV is accessed through the SETUP menu.
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There are two ways to access the
SETUP menu:
Press the blue Setup button or Press the TV Menu button and use the Program ▼ button to select SETUP. Press the OK button to enter the
SETUP menu.
Please note
The system will displayed automatically on
SYSTEM row i.e.BG, L, I, DK depending the receiving broadcasting system of the country. In some countries the broadcasting system can be both in BG/DK or BG/LL´. Only the TV sets produced with Pal Secam BG/DK or Pal
Secam BG/LL´ systems can receive both
BG/DK or BG/LL´ broadcasts. In this case the user can select the required SYSTEM using
buttons.
Please note
If you do not press any buttons for 15 seconds the TV will exit the menu system.
a) If you don’t know the channel number (tuning with search function)
In the Setup menu select PROG
NUMBER and change to 01 using the
Program ▼ button to select it and the button to change it.
Starting with Program 01, tune in the first channel as follow.
Use the Program ▼ button to select SEARCH.
Press the 
or
button to start the tuning search.
The search arrow will flash and the tuning indicator will move upthe scale. When the search finds a strong channel signal it will stop searching. The picture will appear.
Identify which channel you are watching (BBC
1, ITV 1 etc.) and decide which program number you want it to be.
Use the Program ▼ button to select PROGRAM NUMBER.
Use the / buttons to select the program number.
Use the Program ▼ button to select Store. Press the OK button and STORED will appear on the STORE line.
You have now stored the first channel.
Use the Program ▲ button to select again SEARCH and continue the tuning procedure until you have tuned in all the programmes you want or the television can receive.
b) If you know the channel number
(tuning with channel numbers)
Press the OK button to enter the CHANNEL row.
Use the Program ▼/▲ buttons to select “S” for cable channels and “C” or terrestrial broadcast.
Use 
button to select the channel number
Enter the channel number using the Numeric or 
buttons.
Press the OK button to exit the channel row.
Use the Program ▼ button to select
PROGRAM NUMBER.
Use the 
buttons to select the program number.
Use the Program ▼ button to select
STORE. Press the OK button and STORED will appear on the STORE line.
You have now stored the first channel.
Use the Program ▲ button to select again SEARCH and continue the tuning procedure until you have tuned in all the programmes you want or the television can receive.
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To exit the SETUP menu press the
TV/TX button.
Automatic tuning (Autoprogram)
Enter the SETUP menu as before.
Use the Program ▼ button to select AUTOPROGRAM and press the OK button. A list of countries will appear. Select the desired country using
Program and Volume buttons.
When you are sure the aerial is connected properly press the OK button. Autoprogam will start. AUTOPROGRAM WORKING will flash.
To cancel Autoprogram whilst it is working press the TV Menu button repetitively.
As Autoprogram stores a channel it will appear briefly on the screen before the search continues.
When Autoprogram has finished it will flash AUTOPROGRAM SORTING whilst it puts the programmes in order and name them, then go to the first programme stored.
Your TV is now tuned and ready to use.
Please note:
If auto sort fails to arrange the programmes in the required sequence please refer to programme organising.
Fine tuning
Although the search and Autoprogram will automatically try and tune to the best reception, in areas of poor reception a bit of fine tuning may be required.
In the SETUP menu use the Program
▲/▼ buttons to select FINE TUNING. Use the Volume up and Volume down buttons to fine tune.
When you have finished use the
Program ▼ button to select STORE and press the OK button.
TV Set Up
The TV set up is accessed through a menu system.
Once you have stored your set up, this is the set up the TV will default to when you switch it on.
To enter the MAIN menu press the TV Menu button.
Once in the MAIN menu use the Program ▲ and Program ▼ buttons to select items in the menu and the OK to access sub menus or use the coloured fastext and DVD buttons for quick access.
Red button - SOUND Green button - PICTURE
Blue button - SETUP
Pink button - FEATURES
Please note
If you do not press any buttons for 15 seconds the TV will exit the menu system.
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Sound menu (red button)
Select the required item in the menu using the Program ▲/▼ buttons and make the changes pressing / buttons.
Volume
Sets default volume using the VOL+ and VOLbuttons.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu
Balance
Sets the sound balance when theTV is in stereo mode using the
and 
buttons.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu.
Sound Type
This item shows STEREO when receiving stereo transmission from DVD or AV and MONO for mono transmissions.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu.
Sound Mode
You can select NORMAL or SURROUND using the 
buttons.
SURROUND sound is an ‘expanded stereo’. It gives the impression that the two speakers in the TV are further apart than they really are.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu
AVL
TV transmitters have different sound levels. AVL (automatic volume limiting) maintains the same sound level as you switch from program to program. To supply this press Volume + or - button and select ON for AVL.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu.
Picture menu (Green button)
The picture menu allows you to set up the following:
BRIGHTNESS
CONTRAST
COLOUR SHARPNESS
To change, for example, the colour,select it using Program buttons.
Use the and buttons to change the setting.
To save your settings, select STORE and press the OK button.STORED will be displayed.
Smart cont.
This gives you a choice of picture type:
SOFT, NATURAL, RICH or USER.
Use the Program ▲ andProgram ▼ buttons to select the type of picture you want. As you select each one the
TV picture will change to that type.
USER allows you to set your own picture type as follows:
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Use the Program ▼ button to select
USER. S e l e c t B R I G H T N E S S , CONTRAST, COLOUR and,
SHARPNESS using the Program ▲/▼ buttons.
Change the settings with the
buttons.
To save your settings, select STORE and press the OK button. STORED will be displayed. Press the TV Menu button to go back to the previous menu.
Feature menu (Pink button)
Available formats of 4:3 TV sets are 4:3 and 16:9.
4:3 Sets:
4:3, is the screen format of your tv sets. But you can change the picture format to 16:9 to able to watch the inputs in 16:9 format, i.e. some broadcasts and DVD’s.
Once you have switched the TV off the picture format will revert to the stored setting.
To exit the sub-menu press the TV
Menu button and return to the main menu.
Child lock
Childlock switches off the programme you are watching when you select it. All other programmes are unaffected. If you go back to the programme with childlock on you will see a black screen with the OSD showing CHILD
LOCK. You can lock as many programs as you want.
Press the button to switch the
Child lock on or off.
Sleep timer
Allows you to preset the period of time before the TV will switch off automatically.
Press the button to increase the time period in 5 minute steps from 5 minutes to a maximum of 2 hours and to switch the sleep timer off.
The countdown will start immediately. To cancel the sleep timeselect OFF in SLEEP TIMER row by using Volume buttons.
On Timer
Your TV set has a feature which allows the TV to be turned on with your selected program after a pre-selected period ranging from 5 minutes to 12 hours.
Press the "VIOLET" colour button. Choose the
AUTO ON line with “PR▲” or “PR▼” button. Using number buttons enter the number of the program that you wish the TV turns on.
You can choose one of the AV's instead of the program number by pressing the "AV" button. You can return to the program number with TV/TXT button. Using 
or 
button enter the period after which your TV should turn on automatically with 5 minutes steps. Your TV will be turned on the selected program automatically if it is in "stand-by" mode, or will change over to the selected program at the end of this period if it is "on" mode.
Language
There are many languages available for the On Screen Displays (OSD).
Press the OK Press the Program ▼ button to page through all the languages and OK to select.
Auto AV
This feature enables you to switch on automaticaly to AV mode to get the picture of an external device whan its connected to your TV.
Select ON to activate this mode by using 
buttons.
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