Beko K1 CHASSIS User manual

Service Manual
K1 CHASSIS

1
CONTENTS PAGE
oSafetyInstructions 2
oTechnical Specifications 3
oRemote Control 4
oPreparations 5
oOperatingYourTV 6
oBlockDiagram 10
oIC Datasheets&Specs 11
oPin Voltages of IC’s 18
oOscillosgraphs Of Some IC Pins 20
oElectrical Adjustments 24
oChannel Frequency Tables 29
oSparePartList 31

2
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
AC-Voltmeter
TO INSTRUMENTS
EXPOSED
METALLIC PARTS Water pipe
(earth)
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

3
2. TECHNICAL SPECIFICATIONS .
Power source: 220-240V AC, 50-60Hz
Power consumption (nom.) : 55W 20”, 21”
Standby power consumption : 2 W
Aerial impedance : 75Ohm, coaxial type
Receiving system 1: PAL BG
PAL SECAM BG
PAL SECAM BG DK
PAL I
Receiving channels: VHF BAND I CH2-4
VHF BAND III CH5-12
CABLE TV S1-41
UHF BAND CH21-69
Audio outputs : 7W RMS at %10 THD 20”, 21”
High Voltage : 25 ± 0.5 KV 20”, 21”
Focus voltage : %25.6 ± %38 of EHT
Grid 2 voltage : 0-1400 V
Heater voltage : 6.2 ± 0.2 Vrms
Video/Audio Terminals : AV1 IN Video : 1 Vpp,75 Ohm
Audio : 0.5 Vrms, >10 Kohm
RGB
AV1OUT Video : 1 Vpp, 75 Ohm
Audio : 0.5 Vrms, <1 Kohm
AV2 IN (RCA, optional) Video : 1 Vpp, 75 Ohm
Audio : 0.5 Vrms, >10 Kohm
Operating temperature : 0-45 Degrees
Safety : IEC 65 /BS P2N
X-Ray radiation : ACC. IEC 65/BS P2N
1: TV set is produced to receive “one” of these colour and sound systems.

4
3. REMOTECONTROL .
Special features
• Your TV can receive stereo channels directly(NICAM optional).
• 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)
• Spatial Sound effect
• 16:9 picture format
• S-Video connection (optional)
• Audio/Video RCA sockets (optional).
• Normalisation system to recall the setting in memory after the
colour,contrast, brightness setting have been changed.
• Picture adjustment using one button (Smart control).
• Sound adjustment using one button (Smart control).
• Equalizer Sound Setup
• 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
• Virtual Dolby Surround (optional)
• Dynamic Bass (optional)
• Multi language menu system
• On Timer
• Off Timer
• Stereo headphone socket (optional)
• 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.
• Second scart socket (optional)
• Naming the channels
• Teletext reception
• Auto recognition of the broadcasting format (4:3, 16-9) via
WSS feature.
• Digital Colour Transition Improvement (DCTI) (Optional).
• Digital Comb Filter (DCF) (Optional).
• Digital Luminance Transition Improvement (DLTI) (Optional)
• Dynamic Noise Reduction (Optional)
• Picture and Text (optional)
• Blueback (Optional)
• Component input via Scart (optional)
• Program Naming, Editing
• Quick Program Display
• Games (Optional)
• Now&Next (TV Guide), (Optional)
• Alarm function (Optional)
(*): These features are not available in all models.

5
4. PREPARATIONS .
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 75Ωaerial 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.
4
4
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
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
21-Screening
CONNECTING TV WITH VIDEO AND SATELLITE/DIGITALRECEIVER

6
5. OPERATING YOUR TV .
A. SWAP FUNCTION
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.
B. AV
Press theAV button to select your
For use when you are connecting an
external source to your TV (Video
recorder, DVD player etc.) via the SCART
sockets or RCA sockets.
See ‘Connecting external equipment’.
Press the AV button to select your input as
follows:
2 Scart models:
1 AV1 when using SCART socket 1.
2 AV2 when using SCART socket 2.
3 AV2-S for S-Video equipment. (Optional)
4 AV3 when using the RCA sockets
of the TV. (Optional)
5 AV3-S when using the S-video socket and
RCA audio sockets of the TV. (Optional)
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 AVbutton again to return
toTV
C. 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.
• The TV sets equipped with ATS (Automatic
Tuning System) sorts the channels regarding
the broadcasting system of your country
(optionally).
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.
There are two ways to access the SETUP
menu:
Press the blue Setup button or Press
the Menu button and use the
Program down 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 Volume
up/down buttons.

7
Please note
If you do not press any buttons for 15
seconds the TV will exit the menu
system.
In the Setup menu select PROG NO
and change to P1 using the Program
down button to select it and the
Volume up button to change it.
Starting with Program 1, tune in the
first channel as follows:
Use the Program down button to
select SEARCH.
Press the Volume up or Volume
down button to start the tuning
search.
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 down button to
select PROGRAM NO.
Use the Volume up/down buttons to
select the program number.
Use the Program down button to
select Store. Press theOK button and
STORED will appear on the STORE
line.
You have now stored the first
channel.
Use the Program up 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.
Tuning with channel numbers
Enter the SETUP menu by pressing
the blue button. Press the OK button
to enter the CHANNEL row.
Use the OK button to select “S” for
cable channels and “C” for terrestrial
broadcast.
Use Volume up button to select the
channel number buttons.
Enter the channel number using the
Numeric buttons.
Press the Program down/up buttons
to exit the channel row.
Use the Program down button to
select PROGRAM NO.
Use the Volume up/down buttons to
select the program number.
Use the Program down 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 up 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.
To exit the SETUP menu press the
TV/TX button.
Automatic tuning (Autoprogram)
Enter the SETUP menu as before.

8
Use the Program down button to
select AUTOPROGRAM and the OK
button. A list of Press 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.
To cancel Autoprogram while it
isworking press the Menu button.
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 table.
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
up/down buttons to select FINE
TUNE. Use the Volume up and
Volume down buttons to fine tune.
When you have finished use the
Program down button to select
STORE and press the OK button.
D. FEATURES
1-) TV GUIDE(Optional)
You can see the TV Guide information on the
screen by pressing "DOUB" button while a
provider channel or a supported channel by
provider is selected. The information of the
current and next programmes which is sent by
provider is displayed on the screen.
Note: TV Guide information may not have for all
programmes. It depends on the broadcasting
and determined by broadcasting company.
Note:TV Guide is not displayed on the screen,
if there is not a provider in the saved channels.
DATE: Date information is given by provider
channel. You can use the numeric buttons to
change the date.
PROVIDER: Provider is the channel which send
the TV Guide information. You can select the
provider via this function. Press Volume
up/down buttons to select the provider and
then press "OK".
.
STATION MATCH: The supported channels by
provider may not be defined automatically. You
can open this menu and define the provider for
these channels. Adjusting the provider just one
time is enough for these channels.

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DISPLAY INFO: If you want to see the TV
Guide information automatically while changing
the channels, this option should be open. In this
case, if you open the provider channel Mini
Guide occurs on the screen.
2-) PAT (Picture and Text) (OPTIONAL)
In the double window function, you can also
display the teletext screen in the second
window.
3-) PIP Picture Position Change
Press the POS button repeatedly until
desired position is achieved. The PIP
picture moves clockwise.

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6. BLOCK DIAGRAM OF E1 CHASSIS .

11
7. IC DATASHEETS&SPECS .
7.1)VCT 49XYI
GENERAL DECRIPTION
The VCT 49xyI is an IC family of high-quality singlechip TV processors. Modular design and deep-
submicron technology allow the economic integration of features in all classes of single-scan TV sets.
The VCT 49xyI family is based on functional blocks contained and approved in existing products like
DRX 396xA, MSP 34x5G, VSP 94x7B, DDP 3315C, and SDA 55xx.
Each member of the family contains the entire IF, audio, video, display, and deflection processing for
4:3 and 16:9 50/60-Hz mono and stereo TV sets. The integrated microcontroller is supported by a
powerful OSD generator with integrated Teletext & CC acquisition including on-chip page memory.
Features
The VCT 49xyI family offers a rich feature set,
overing the whole range of state-of-the-art
50/60-Hz TV applications.
– PSSDIP88-1/-2 package
– PMQFP144-2 package
– Submicron CMOS technology
– Low-power standby mode
– Single 20.25 MHz reference crystal
– 8-bit 8051 instruction set compatible CPU
– Up to 256 kB on-chip program ROM
– WST, PDC, VPS, and WSS acquisition
– Closed Caption and V-chip acquisition
– Up to 10 pages on-chip teletext memory
– Multi-standard QSS IF processing with single SAW
– FM Radio and RDS with standard TV tuner
– TV-sound demodulation:
• all A2 standards
• all NICAM standards
• BTSC/SAP with MNR (DBX optional)
• EIA-J
– Baseband sound processing for loudspeaker
channel:
• volume and balance

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• bass/treble or equalizer
• loudness and spatial effect (e.g. pseudo stereo)
• Micronas AROUND (virtual Dolby optional)
• Micronas BASS
• further optional and licence requiring sound enhancements as BBE, SRS Wow and Micronas
VOICE
– CVBS, S-VHS, YCrCb and RGB inputs
– 4H adaptive comb filter (PAL/NTSC)
– multi-standard color decoder (PAL/NTSC/SECAM)
– Nonlinear horizontal scaling “panorama vision”
– Luma and chroma transient improvement (LTI, CTI)
– Non-linear color space enhancement (NCE)
– Dynamic black level expander (BLE)
– Scan velocity modulation output
– Soft start/stop of H-drive
– Vertical angle and bow correction
– Average and peak beam current limiter
– Nonlinear and dynamic EHT compensation
– Black switch off procedure (BSO)

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PIN CONNECTIONS AND SHORT DESCRIPTIONS
NC = not connected
LV = if not used, leave vacant
OBL = obligatory; connect as described in circuit diagram
IN = Input Pin
OUT = Output Pin
SUPPLY = Supply Pin
Pin
No Pin Name Type
Connection
(If not
used) Short Description
1 GND SUPPLY OBL Ground Platform
2 VSUP8.0AU SUPPLY OBL Supply Voltage Analog Audio, 8.0 V
3 VREFAU OBL Reference Voltage, Audio
4 SPEAKERL OUT LV Analog Loudspeaker Output, Right
5 SPEAKERR OUT LV Analog Loudspeaker Output, Right
6 AOUT1L OUT LV Analog Audio 1 Output, Left
7 AOUT1R OUT LV Analog Audio 1 Output, Right
8 AIN3L/AOUT2L IN/OUT LV Analog Audio 3 Input, Left / Analog Audio 2 Output, Left
9 AIN3R/AOUT2R IN/OUT LV Analog Audio 3 Input, Right / Analog Audio 2 Output, Right
10 AIN2L IN GND Analog Audio 2 Input, Left
11 AIN2R IN GND Analog Audio 2 Input, Right
12 AIN1L IN GND Analog Audio 1 Input, Left
13 AIN1R/SIF IN/OUT GND Analog Audio 1 Input Right/Analog 2nd Sound IF Output
14 TAGC OUT LV Tuner AGC Output
15 VREFIF OBL Reference Voltage, IF ADCs
16 IFIN- IN VREFıf Differential IF Input
17 IFIN+ IN VREFıf Differential IF Input
18 RESETQ IN/OUT OBL Reset Input/Output
19 VSUP5.0FE SUPPLY OBL Supply Voltage Analog IF Front-end, 5.0 V
20 VSUP5.0IF SUPPLY OBL Supply Voltage IF ADC, 5.0 V
21 VSUP3.3DIG SUPPLY OBL Supply Voltage Digital Core, 3.3 V
22 GND SUPPLY OBL Ground Platform
23 GND SUPPLY OBL Ground Platform
24 VSUP1.8DIG SUPPLY OBL Supply Voltage Digital Core, 1.8 V (main and stand by supply)
25 XTAL1 IN OBL Analog Crystal Input
26 XTAL2 OUT OBL Analog Crystal Output
27 P22 IN/OUT LV Port 2, Bit 2 Input/Output
28 P23 IN/OUT LV Port 2, Bit 3 Input/Output
29 VIN11 IN GND Analog Video 11 Input
30 VIN10 IN GND Analog Video 10 Input
31 VIN9 IN GND Analog Video 9 Input
32 VIN8 IN GND Analog Video 8 Input
33 VIN7 IN GND Analog Video 7 Input
34 VIN6 IN GND Analog Video 6 Input
35 VIN5 IN GND Analog Video 5 Input
36 VIN4 IN GND Analog Video 4 Input
37 VIN3 IN GND Analog Video 3 Input
38 VIN2 IN GND Analog Video 2 Input
39 VIN1 IN GND Analog Video 1 Input
40 VOUT1 OUT LV Analog Video 1 Output
41 VOUT2 OUT LV Analog Video 2 Output
42 VOUT3 OUT LV Analog Video 3 Output

14
43 VSUP1.8FE SUPPLY OBL
Supply Voltage Analog Video Front-end, 1.8 V (main and stand by
supply)
44 GND SUPPLY OBL Ground Platform
45 GND SUPPLY OBL Ground Platform
46 VSUP3.3FE SUPPLY OBL
Supply Voltage Analog Video Front-end, 3.3 V (main and stand by
supply)
47 P10 IN/OUT LV Port 1, Bit 0 Input/Output
48 P11 IN/OUT LV Port 1, Bit 1 Input/Output
49 P12 IN/OUT LV Port 1, Bit 2 Input/Output
50 P13 IN/OUT LV Port 1, Bit 3 Input/Output
51 P14 IN/OUT LV Port 1, Bit 4 Input/Output
52 P15 IN/OUT LV Port 1, Bit 5 Input/Output
53 P16 IN/OUT LV Port 1, Bit 6 Input/Output
54 P17 IN/OUT LV Port 1, Bit 7 Input/Output
55 P20 IN/OUT LV Port 2, Bit 0 Input/Output
56 P21 IN/OUT LV Port 2, Bit 1 Input/Output
57 SCL IN/OUT OBL I²C Bus Clock Input/Output
58 SDA IN/OUT OBL I²C Bus Data Input/Output
59 VPROT IN GND Vertical Protection Input
60 HOUT OUT LV Horizontal Drive Output
61 HFLB IN HOUT Horizontal Flyback Input
62 SAFETY IN GND Safety Input
63 GNDDAC SUPPLY OBL Ground Video DACs
64 VSUP3.3DAC SUPPLY OBL Supply Voltage Video DACs, 3.3 V
65 VSUP3.3IO SUPPLY OBL Supply Voltage I/O Ports, 3.3 V (main and Standby supply)
66 GND SUPPLY OBL Ground Platform
67 GND SUPPLY OBL Ground Platform
68 VSUP3.3BE SUPPLY OBL Supply Voltage Analog Video Back-end, 3.3 V
69 XREF OBL Reference Current for RGB DACs
70 VRD OBL Reference Voltage for RGB DACs
71 BOUT OUT VSUP5.0BE Analog Blue Output
72 GOUT OUT VSUP5.0BE Analog Green Output
73 ROUT OUT VSUP5.0BE Analog Red Output
74 SVMOUT OUT VSUP5.0BE Scan Velocity Modulation Output
75 BIN IN GND Analog Blue Input, Back-end
76 GIN IN GND Analog Green Input, Back-end
77 RIN IN GND Analog Red Input, Back-end
78 FBIN IN GND Fast Blank Input, Back-end
79 GNDM IN GND Reference Ground for Sense ADC
80 SENSE IN GND Sense ADC Input
81 RSW1 OUT LV Range Switch 1 Output
82 RSW2 OUT LV Range Switch 2 Output
83 EW OUT GND Vertical Parabola Output
84 VERT- OUT GND Differential Vertical Sawtooth Output
85 VERT+ OUT GND Differential Vertical Sawtooth Output
86 TEST IN GND Test Input, reserved for Test
87 VSUP5.0BE SUPPLY OBL Supply Voltage Analog Video Back-end, 5.0 V
88 GND SUPPLY OBL Ground Platform

15
7.2)TDA 8357
GENERAL DESCRIPTION
The TDA8357J is a power circuit for use in 90° and
110° colour deflection systems for 25 to 200 Hz field
frequencies, and for 4 : 3 and 16 : 9 picture tubes. The IC
contains a vertical deflection output circuit, operating as a
high efficiency class G system. The full bridge output
circuit allows DC coupling of the deflection coil in
combination with single positive supply voltages.
The IC is constructed in a Low Voltage DMOS (LVDMOS)
process that combines bipolar, CMOS and DMOS
devices. DMOS transistors are used in the output stage
because of absence of second breakdown.
FEATURES
• Few external components required
• High efficiency fully DC coupled vertical bridge outputcircuit
• Vertical flyback switch with short rise and fall times
• Built-in guard circuit
• Thermal protection circuit
• Improved EMC performance due to differential inputs
SYMBOL PARAMETERS CONDITIONS MIN. TYP. MAX UNIT
Vp Supply voltage 7.5 12 18 V
VFB flyback supply voltage 2 x VP 45 66 V
Iq(P)(av) average quiescent supply current during scan - 10 15 mA
Iq(FB)(av) Iq(FB)(av) during scan - - 10 mA
Ptot total power dissipation - - 8 W
Vi(p-p) input voltage (peak-to-peak value) - 1000 1500 mV
Io(p-p) output current (peak-to-peak value) - - 2.0 A
Io(peak) maximum (peak) output current t ≤1.5 ms --±1.2A
Tstg storage temperature -55 - +150 ºC
Tj junction temperature - - +150 ºC
Supplies
Inputs and outputs
Flyback switch
Thermal data; in accordance with IEC 60747-1
7.3)MC14052B
The MC14052B analog multiplexer is a digitally–controlled analog switch.
The MC14052B effectively implements a DP4T solid state switch. This
device’s feature low ON impedance and very low OFF leakage current.
Control of analog signals up to the complete supply voltage range can be
achieved.
•Triple Diode Protection on Control Inputs
•Switch Function is Break Before Make
•Supply Voltage Range = 3.0 Vdc to 18 Vdc

16
•Analog Voltage Range (VDD – VEE) = 3.0 to 18 V Note: VEE must be _ VSS
•Linearized Transfer Characteristics
•Low–noise – 12 nV//Cycle, f . 1.0 kHz Typical
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum
rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained
to the range VSS _ (Vin or Vout) _ VDD. Unused inputs must always be tied to an appropriate logic
voltage level (e.g., either VSS, VEE or VDD). Unused outputs must be left open.
7.4)AN5277(Dual Channel SEPP Power Amplifier)
The AN5277 is a monolithic integrated circuit designed for 10.0 W (26 V, 8 W)output audio power
amplifier. It is a dual channel SEPP IC suitable for stereo operation in TV application.
Features
•Few external components :
•No Boucherot cells(output C, R)
•No Bootstrap Capacitors
•No Negative Feedback Capacitors
•Built-in muting circuit
•Built-in standby circuit
•Built-in various protection circuits (Load-short, thermal, over-voltage and current)
•High ripple rejection(55 dB)
•Compatible with AN5275, AN5276
•Operating voltage range 10 ~ 32 V(26 V typ.)
7.5)ICE1QS01(Controller for Switch Mode Power Supplies Supporting Low Power
Standby and Power Factor Correction (PFC))
Features
•Line Current Consumption with PFC
•Standby Input Power < 1 W
•Stable Standby Frequency

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•Low Power Consumption
•Very Low Start-up Current
•Soft-Start for noiseless Start-up
•Standby Burst Mode with and without
Control Signal for lowered Output Voltages
•Digital Frequency Reduction in small Steps
at Decreasing Load
•Over- and Undervoltage Lockout
•Switch Off at Mains Undervoltage
•Mains Voltage Dependent Fold Back Point
Correction
•Ringing Suppression Time Controlled from
Output Voltage
•Easy Design In
•Free usable Fault Comparator
Functional Description
The ICE1QS01 is optimized to control free running flyback converters with and without Power Factor
Correction (with PFC Charge Pump). The switching frequency is reduced in small steps with
decreasing load towards a minimum of 20 kHz in standby mode. This function is performed by a digital
circuit to avoid any jitter also with periodically pulsed loads. To provide extremely low power
consumption at light loads, this device can be switched into Standby Burst Mode. This is also possible
without standby control signal (for adapter application). Additionally, the start up current is very low. To
avoid switching stresses of the power devices, the power transistor is always switched on at minimum
voltage. The device has several protection functions: VCC overand undervoltage, mains undervoltage
and current limiting. Regulation can be done by using the internal error amplifier or an opto coupler
feedback. The output driver is ideally suited for driving a power MOSFET. The ICE1QS01 is suited for
TV-sets, VCR- sets, SAT- receivers and other consumer applications in the power range from 0 to app.
300 W.

18
8. PIN VOLTAGES OF IC’S .
IC 101(VCTI)
Video-Controller-Text-IFAudio IC Family
Pin
No Pin Name Short Description
V DC
ST-BY
Pin
No Pin Name Short Description
V DC
ST-BY
1 GND Ground Platform 0 0 45 GND Ground Platform 0 0
2 VSUP8.0AU Supply Voltage Analog Audio, 8.0 V 8,13 1,35 46 VSUP3.3FE
Supply Voltage Analog Video Front-
end, 3.3 V 3,3 3,3
3 VREFAU Reference Voltage, Audio 3,67 0 47 P10 Port 1, Bit 0 Input/Output 3,27 0
4 SPEAKERL Analog Loudspeaker Output, Right 3,72 0 48 P11 Port 1, Bit 1 Input/Output 0 3,27
5 SPEAKERR Analog Loudspeaker Output, Right 3,72 0 49 P12 Port 1, Bit 2 Input/Output 3,3 3,29
6 AOUT1L Analog Audio 1 Output, Left 3,72 0 50 P13 Port 1, Bit 3 Input/Output 0 3,28
7 AOUT1R Analog Audio 1 Output, Right 3,72 0 51 P14 Port 1, Bit 4 Input/Output 0 0
8 AIN3L/AOUT2L
Analog Audio 3 Input, Left / Analog
Audio 2 Output, Left 3,43 0 52 P15 Port 1, Bit 5 Input/Output 0 0
9 AIN3R/AOUT2R
Analog Audio 3 Input, Right / Analog
Audio 2 Output, Right 3,44 0 53 P16 Port 1, Bit 6 Input/Output 2,77 2,77
10 AIN2L Analog Audio 2 Input, Left 3,7 0 54 P17 Port 1, Bit 7 Input/Output 2,79 2,79
11 AIN2R Analog Audio 2 Input, Right 3,7 0 55 P20 Port 2, Bit 0 Input/Output 3,32 2,9
12 AIN1L Analog Audio 1 Input, Left 3,7 0 56 P21 Port 2, Bit 1 Input/Output 3,24 0,6
13 AIN1R/SIF
Analog Audio 1 Input Right/Analog
2nd Sound IF Output 3,7 0 57 SCL I²C Bus Clock Input/Output 3,3 3,06
14 TAGC Tuner AGC Output 3,77 0,82 58 SDA I²C Bus Data Input/Output 3,3 3,06
15 VREFIF Reference Voltage, IF ADCs 2,42 0,9 59 VPROT Vertical Protection Input 0,05 0
16 IFIN- Differential IF Input 2,43 0,76 60 HOUT Horizontal Drive Output 1,55 3,29
17 IFIN+ Differential IF Input 2,43 0,76 61 HFLB Horizontal Flyback Input 0,65 0
18 RESETQ Reset Input/Output 3,29 3,27 62 SAFETY Safety Input 0,03 0,43
19 VSUP5.0FE
Supply Voltage Analog IF Front-end,
5.0 V 4,96 1 63 GNDDAC Ground Video DACs 0 0
20 VSUP5.0IF Supply Voltage IF ADC, 5.0 V 4,92 1 64 VSUP3.3DAC Supply Voltage Video DACs, 3.3 V 3,29 1
21 VSUP3.3DIG Supply Voltage Digital Core, 3.3 V 3,14 1 65 VSUP3.3IO
Supply Voltage I/O Ports, 3.3 V
(main and Standby supply) 3,31 3,31
22 GND Ground Platform 0 0 66 GND Ground Platform 0 0
23 GND Ground Platform 0 0 67 GND Ground Platform 0 0
24 VSUP1.8DIG
Supply Voltage Digital Core, 1.8 V
(main and stand by supply) 1,85 1,97 68 VSUP3.3BE
Supply Voltage Analog Video Back-
end, 3.3 V 3,28 1
25 XTAL1 Analog Crystal Input 1,71 1,7 69 XREF Reference Current for RGB DACs 1,22 0
26 XTAL2 Analog Crystal Output 1,74 1,72 70 VRD Reference Voltage for RGB DACs 1,24 0,95
27 P22 Port 2, Bit 2 Input/Output 3,27 3,26 71 BOUT Analog Blue Output 4,66 1
28 P23 Port 2, Bit 3 Input/Output 3,27 3,26 72 GOUT Analog Green Output 4,66 1
29 VIN11 Analog Video 11 Input 0,12 0,09 73 ROUT Analog Red Output 4,66 1
30 VIN10 Analog Video 10 Input 0 0,09 74 SVMOUT Scan Velocity Modulation Output 1,77 0,37
31 VIN9 Analog Video 9 Input 0,5 0,09 75 BIN Analog Blue Input, Back-end 0,19 0
32 VIN8 Analog Video 8 Input 0,5 0,09 76 GIN Analog Green Input, Back-end 0,19 0
33 VIN7 Analog Video 7 Input 0,99 0,09 77 RIN Analog Red Input, Back-end 0,19 0
34 VIN6 Analog Video 6 Input 0,99 0,09 78 FBIN Fast Blank Input, Back-end 0,07 0,07
35 VIN5 Analog Video 5 Input 0,99 0,09 79 GNDM Reference Ground for Sense ADC 0 0
36 VIN4 Analog Video 4 Input 1 0,09 80 SENSE Sense ADC Input 0,23 0
37 VIN3 Analog Video 3 Input 1 0,09 81 RSW1 Range Switch 1 Output 0,03 0
38 VIN2 Analog Video 2 Input 1 0,09 82 RSW2 Range Switch 2 Output 0,01 0
39 VIN1 Analog Video 1 Input 1 0,09 83 EW Vertical Parabola Output 4,37 0
40 VOUT1 Analog Video 1 Output 1,08 1,49 84 VERT- Differential Vertical Sawtooth Output 0,82 0
41 VOUT2 Analog Video 2 Output 1,08 1,49 85 VERT+ Differential Vertical Sawtooth Output 0,79 0
42 VOUT3 Analog Video 3 Output 1,17 0,98 86 TEST Test Input, reserved for Test 3,71 0
43 VSUP1.8FE
Supply Voltage Analog Video Front-
end, 1.8 V 1,9 1,9 87 VSUP5.0BE
Supply Voltage Analog Video Back-
end, 5.0 V 5,01 0
44 GND Ground Platform 0 0 88 GND Ground Platform 0 0

19
IC 301(AN 5277)
Dual Channel SEPP Power Amplifier
Pin
No Pin Name Short Description
V DC
ST-BY
Pin
No Pin Name Short Description
V DC
ST-BY
1 N.C NOT CONNECTED 0 0 7 CH.2 OUT CHANNEL 2 OUTPUT 12 0
2 CH.1 IN. CHANNEL 1 INPUT 0 0 8 MUTE MUTE 0,37 4,44
3 RF RIPPLE FILTER 23,1 0,76 9 GND(OUTPUT) OUTPUT GROUND 0 0
4 GND(INPUT) INPUT GROUND 0 0 10 Vcc Vcc 25,3 8,47
5 CH.2 IN CHANNEL 2 INPUT 0 0 11 ST-BY STANDBY 16,5 0,43
6 N.C NOT CONNECTED 0 0 12 CH.1 OUT CHANNEL 1 OUTPUT 12 0
IC 602(ICE1QS01)
Dual Channel SEPP Power Amplifier
Pin
No Pin Name Short Description
V DC
ST-BY
Pin
No Pin Name Short Description
V DC
ST-BY
1 N.C NOT CONNECTED 0 0 5 OFC
OVERVOLTAGE FAULT
COMPARATOR 0 0
2 PCS PRIMARY CURRENT SIMULATION 1,3 9,06 6 GND GROUND 0 0
3 RZI
REGULATION AND ZERO CROSSING
INPUT 1,35 0,04 7 OUT OUTPUT 1,79 0
4 SRC
SOFT-START AND REGULATION
CPACITOR 2,76 0,34 8 Vcc SUPPLY VOLTAGE 11,4 10,1
IC 501(TDA 8357)
VERTICAL DEFLECTION
Pin
No Pin Name Short Description
V DC
ST-BY
Pin
No Pin Name Short Description
V DC
ST-BY
1 INA INPUT A 0,79 0 6 Vfb FLAYBACK SUPPLY COLTAGE 46,5 0
2 INB INPUT B 0,77 0 7 OUTA OUTPUT A 6,46 0
3 Vp SUPPLY VOLTAGE 12,4 0 8 GUARD GUARD OUTPUT 0,25 0
4 OUTB OUTPUT B 6,5 0 9 FEEDB FEEDBACK INPUT 6,55 0
5 GND GROUND 0 0