Vivax TV-2104 User manual

COLOR TELEVISION
SERVICE MANUAL
MODEL NO.
CHASSIS NO. ETE-2
Please read this manual carefully before service.
TV-2104 TV-2105 TV-2174

TABLE OF CONTENTS
SAFETY INSTRUCTIONS AND MAINTENANCE ........................... 1
X-RAY RADIATION PRECAUTION..........................................................................…......... 1
SAFETY PRECAUTION .........................................................................................…......... 1
PRODUCT SAFETY NOTICE .................................................................................. …......... 2
SAFETY SYMBOL DESCRIPTION .........................................................................…......... 3
MAINTENANCE ....................................................................................................... …......... 3
ADJUSTMENTS ........................................................................… ..... 4
SET-UP ADJUSTMENTS .......................................................................................…......... 4
CIRCUIT ADJUSTMENTS........................................................................................…......... 7
STRUCTURE AND CHASSIS FUNCTION DESCRIPTION..........…..13
STRUCTURE BLOCK DIAGRAM ..............................................................................….... 13
CHASSIS DESCRIPTION ..................................................................................... … … ... 14
SERVICE DATA ....................................................................… ....…....15
APPENDIX
CIRCUIT DIAGRAM

SERVICE MANUAL
SAFETY INSTRUCTIONS AND MAINTENANCE
WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “ X-RAY RADIATION
PRECAUTION ” , “ SAFETY PRECAUTION ” AND “ PRODUCT SAFETY NOTICE ” INSTRUCTION
BELOW.
X-RAY RADIATION PRECAUTION
1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit
X-ray radiation as result of excessive EHT voltage. The maximum EHT voltage permissible in any
operating circumstances must not exceed the rated value. When checking the EHT, use the High
Voltage Check procedure in this manual using an accurate EHT voltmeter.
2. The only source of X-RAY radiation in this TV is the CRT. The TV minimizes X-RAY radiation,
which ensures safety during normal operation. To prevent X-ray radiation, the replacement CRT
must be identical to the original fitted as specified in the parts list.
3. Some components used in this TV have safety related characteristics preventing the CRT from
emitting X-ray radiation. For continued safety, replacement component should be made after
referring the PRODUCT SAFETY NOTICE below.
4. Service and adjustment of the TV may result in changes in the nominal EHT voltage of the CRT
anode. So ensure that the maximum EHT voltage does not exceed the rated value after service
and adjustment.
SAFETY PRECAUTION
WARNING: REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ONLY.
1. The TV has a nominal working EHT voltage. Extreme caution should be exercised when working
on the TV with the back removed.
1.1 Do not attempt to service this TV if you are not conversant with the precautions and procedures for
working on high voltage equipment.
1.2 When handling or working on the CRT, always discharge the anode to the TV chassis before
removing the anode cap in case of electric shock.
1.3 The CRT, if broken, will violently expel glass fragments. Use shatterproof goggles and take
extreme care while handling.
1.4 Do not hold the CRT by the neck as this is a very dangerous practice.
2. It is essential that to maintain the safety of the customer all power cord forms be replaced exactly
as supplied from factory.
3. Voltage exists between the hot and cold ground when the TV is in operation. Install a suitable
isolating transformer of beyond rated overall power when servicing or connecting any test
equipment for the sake of safety.
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SERVICE MANUAL
2
4. When replacing ICs, use specific tools or a static-proof electric iron with small power (below 35W).
5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to
avoid electronic gun magnetized and decrement in convergence of the CRT.
6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons,
switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are installed on the
original place.
7. Replace blown fuses within the TV with the fuse specified in the parts list.
8. When replacing wires or components to terminals or tags, wind the leads around the terminal before
soldering. When replacing safety components identified by the international hazard symbols on the
circuit diagram and parts list, it must be the company-approved type and must be mounted as the
original.
9. Keep wires away from high temperature components.
PRODUCT SAFETY NOTICE
CAUTION: FOR YOUR PROTECTION, THE FOLLOWING PRODUCT SAFETY NOTICE
SHOULD BE READ CAREFULLY BEFORE OPERATING AND SERVICING THIS TV SET.
1. Many electrical and mechanical components 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 replacements
rated at higher voltages or wattage, etc. Components which have these special safety
characteristics in this manual and its supplements are identified by the international hazard symbols
on the circuit diagram and parts list. Before replacing any of these components read the parts list in
this manual carefully. Substitute replacement components which do not have the same safety
characteristics as specified in the parts list may create X-ray radiation.
2. Do not slap or beat the cabinet or CRT, since this may result in fire or explosion.
3. Never allow the TV sharing a plug or socket with other large-power equipment. Doing so may result
in too large load, causing fire.
4. Do not allow anything to rest on or roll over the power cord. Protect the power cord from being
walked on, modified, cut or pinched, particularly at plugs.
5. Do not place any objects, especially heavy objects and lightings, on top of the TV set. Do not install
the TV near any heat sources such as radiators, heat registers, stove, or other apparatus that
produce heat.
6. Service personnel should observe the SAFETY INSTRUCTIONS in this manual during use and
servicing of this TV set. Otherwise, the resulted damage is not protected by the manufacturer.

SERVICE MANUAL
3
SAFETY SYMBOL DESCRIPTION
The lightning symbol in the triangle tells you that the voltage inside this product may be strong
nough to cause an electric shock. Extreme caution should be exercised when working on the TV
with the back removed.
e
This is an international hazard symbol, telling you that the components identified by the symbol
have special safety-related characteristics.
FDA This symbol tells you that the critical components identified by the FDA marking have
special safety-related characteristics.
UL This symbol tells you that the critical components identified by the UL marking
have special safety-related characteristics.
C UL This symbol tells you that the critical components identified by the C-UL marking have been
evaluated to the UL and C-UL standards and have special safety-related
characteristics.
VDE This symbol tells you that the critical components identified by the VDE marking have
special safety-related characteristics.
MAINTENANCE
1. Place the TV set on a stable stand or base that is of adequate size and strength to prevent it from
being accidentally tipped over, pushed off, or pulled off. Do not place the set near or over a radiator
or heat register, or where it is exposed to direct sunlight.
2. Do not install the TV set in a place exposed to rain, water, excessive dust, mechanical vibrations or
impacts.
3. Allow enough space (at least 10cm) between the TV and wall or enclosures for proper ventilation.
4. Slots and openings in the cabinet should never be blocked by clothes or other objects.
5. Please power off the TV set and disconnect it from the wall immediately if any abnormal condition
are met, such as bad smell, belching smoke, sparkling, abnormal sound, no picture/sound/raster.
Hold the plug firmly when disconnecting the power cord.
6. Unplug the TV set from the wall outlet before cleaning or polishing it. Use a dry soft cloth for
cleaning the exterior of the TV set or CRT screen. Do not use liquid cleaners or aerosol cleaners.

SERVICE MANUAL
ADJUSTMENTS
SET-UP ADJUSTMENTS
The following adjustments should be made when a complete realignment is required or a new picture
tube is installed.
Perform the adjustments in the following order:
1. Color purity
2. Convergence
3. White balance
Notes:
①The purity/convergence magnet assembly and rubber wedges need mechanical positioning.
②For some picture tubes, purity/ convergence adjustments are not required.
1. Color Purity Adjustment
Preparation:
Before starting this adjustment, adjust the vertical sync, horizontal sync, vertical amplitude and
focus.
1.1 Face the TV set north or south.
1.2 Connect the power plug into the wall outlet and turn on the main power switch of the TV set.
1.3 Operate the TV for at least 15 minutes.
1.4 Degauss the TV set using a specific degaussing coil.
1.5 Set the brightness and contrast to maximum.
1.6 Counter clockwise rotate the R /B low brightness potentiometers to the end and rotate the green
low brightness potentiometer to center.
1.7 Receive green raster pattern signals.
1.8 Loosen the clamp screw holding the deflection yoke assembly and slide it forward or backward to
display a vertical green zone on the screen. Rotate and spread the tabs of the purity magnet
around the neck of the CRT until the green zone is located vertically at the center of the screen.
1.9 Slowly move the deflection yoke assembly forward or backward until a uniform green screen is
obtained.
1.10 Tighten the clamp screw of the assembly temporarily. Check purity of the red raster and blue
raster until purities of the three rasters meet the requirement.
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SERVICE MANUAL
Yok
Fig. 1
2. Convergence Adjustment
Preparation:
Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes.
2.1 Center convergence adjustment
2.1.1 Receive dot pattern.
2.1.2 Adjust the brightness/contrast controls to obtain a sharp picture.
2.1.3 Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue
vertical lines are superimposed each other on the center of the screen.
2.1.4 Turn both tabs at the same time keeping the angle constant to superimpose red and blue
horizontal on the center of the screen.
2.1.5 Adjust two tabs of the 6-pole magnet to superimpose red/blue line and green line.
2.1.6 Remember red and blue movement. Repeat steps 2.1.3～2.1.5 until optimal convergence is
obtained.
2.2 Circumference convergence adjustment
2.2.1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting.
2.2.2 Temporarily put the first wedge between the picture tube and deflection yoke assembly. Move
front of the deflection yoke up or down to obtain better convergence in circumference. Push the
mounted wedge in to fix the yoke temporarily.
2.2.3 Put the second wedge into bottom.
2.2.4 Move front of the deflection yoke to the left or right to obtain better convergence in
circumference.
2.2.5 Fix the deflection yoke position and put the third wedge in either upper space. Fasten the
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SERVICE MANUAL
2.2.6
2.2.7
deflection yoke assembly on the picture tube.
Detach the temporarily mounted wedge and put it in either upper space. Fasten the deflection
yoke assembly on the picture tube.
After fastening the three wedges, recheck overall convergence and ensure to get optimal
convergence. Tighten the lamp screw holding the deflection yoke assembly.
3. White Balance Adjustment
Generally, white balance adjustment is made with professional equipment. It’s not practical to get good
white balance only through manual adjustment. For TVs with I2C bus control, change the bus data to
adjust white balance.
Incline the Yoke Up (or Down) Incline the Yoke Right (or Left)
Circumference Convergence by DEF Yoke
Center Convergence by Convergence Magnets
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SERVICE MANUAL
CIRCUIT ADJUSTMENTS
Preparation:
Circuit adjustments should be made only after completion of set-up adjustments.
Circuit adjustments can be performed using the adjustable components inside the TV set. For TVs with
2
I C bus control, first change the bus data.
1. Degaussing
A degaussing coil is built inside the TV set. Each time the TV is powered on, the degaussing coil
will automatically degauss the TV. If the TV is magnetized by external strong magnetic field,
causing color spot on the screen, use a specific degausser to demagnetize the TV in the following
ways. Otherwise, color distortion will be shown on the screen.
1.1 Power on the TV set and operate it for at least 15 minutes.
1.2 Receive red full-field pattern.
1.3 Power on the specific degausser and face it to the TV screen.
1.4 Turn on the degausser. Slowly move it around the screen and slowly take it away from the TV.
1.5 Repeat the above steps until the TV is degaussed completely.
2. Confirmation and Adjustment for Voltage
Caution: +B voltage has close relation to high voltage. To prevent X-ray radiation, set +B voltage to
the rated value.
2.1 Make sure that the supply voltage is within the range of the rated value.
2.2 Connect a digital voltmeter to the voltage output terminal of the main PCB. Power on the TV and set
the brightness and sub-brightness to minimum. Ensure that the voltage from the main PCB reads as
follows.
2.3 Regulate voltage adjustment components on the power section until the +B the voltage reaches the
rated value.
Table 1
Test Point Voltage (V) Test Point Voltage (V)
TP-115V 117V±1.5V TP-18V 23V±2V
TP-15V 15.5V±1V TP-5V 5V±0.5V
TP-3.3V 3.3V±0.3V TP-8V 8V±1V
TP-12V 13V±2V TP--12V -13V±2V
TP-195V 196V±2V
Note:
It’s impossible to check the power part separately from the main chassis board as the part is
mounted on the main chassis board. The power components, etc. should be checked for
burnout when power-on. If burned out, do not power on the TV again until the cause is found
out.
7

3. High Voltage Inspection
Measure voltages of test points on the main PCB with the digital voltmeter. Measure the CRT
high voltage with the high-voltage testing equipment and heater voltage with the high-frequency
effective voltmeter. The rated values are shown as below.
Table 2
Test Point Voltage (V)
Negative of VD491196±2V
21"FS-CRT-anode 26±1.5KV
21"PF-CRT-anode 27±1.5KV
Heater 6.3±0.3Vrms
4. Focus Adjustment
Caution: Dangerously high voltages are present inside the TV. Extreme caution should be
exercised when working on the TV with the back removed.
4.1 After removing the back cover, look for the FBT on the main PCB. There should be a FCB on
the FBT.
4.2 Power on the TV and preheat it for 15 min.
4.3 Receive a normal TV signal. Rotate knob of the FCB until you get a sharp picture.
BeforeAdjusting AfterAdjusting
Fig. 4
5. Safety Inspection
5.1 Inspection for insulation and voltage-resistant
Perform safety test for all naked metal of the TV. Supply high voltage of 2500V AC, 50Hz (limit
current of 10mA) between all naked metal and cold ground. Test every point for 3 sec. and
ensure no arcing and sparking.
5.2 Requirements for insulation resistance
Measure resistance between naked metal of the TV and feed end of the power cord to be
infinity with a DC-500 high resistance meter and insulation resistance between the naked metal and
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SERVICE MANUAL
degaussing coil to be over 20M .
6. SERVICE mode
6.1 To enter the DESIGN/SERVICE mode
Set the volume to 0. Then press and hold the MUTE button on the remote control, and press the
MENU button on the TV to enter the SERVICE mode. To exit from the S mode, turn off the TV
set by the POWER button on the remote control.
Caution: The user service mode adjustment can be changed only when service personnel adjust the
whole set data during servicing. As the control data have dramatic effects on functions and
performance of the TV, service personnel should not tell user how to enter the SERVICE mode to
avoid improper data settings.
6.2 Adjustments and bus data (GDET0201-02)
Table 3 Function Description for Bus Data
SERVICE mode adjust description note
STS0/1/2/3/4 UOC system surveillance display
IFP1 00 IF PRESET VALUE1 #
IFP2 00 IF PRESET VALUE2 #
TINT 20 BASE BAND TINT CONTROL #
TWBK 88 TIME OF “WIDE BLANKING” #
PWL 15 Peak white limted #
OIF 20 Off-set if demodulatour #
5HP/6HP adjustable HOR PARALLELOGRAM CORRECTION *
5HB/6HB adjustable HOR BOW CORRECTION *
5HSH/6HSH adjustable HORIZONTAL SHIFT *
5HZD/6HZD 0A DVD HORIZONTAL SHIFT ***
5EWW/6EWW adjustable E-W WIDTH *
5EWP/6EWP adjustable E-W PARABOLA WIDTH *
5UCR/6UCR adjustable E-W UPPER CORNER PARABOLA *
5LCR/6LCR adjustable E-W BOTTOM CORNER PARABOLA *
5TC/6TC adjustable E-W TRAPEZIUM *
5VSL/6VSL adjustable VERTICAL SLOPE *
5VAM/6VAM adjustable VERTICAL AMPLITUDE *
5SCL/6SCL adjustable VERTICAL S CORRECTION *
5VSH/6VSH adjustable VERTICAL SHIFT *
5VZD/6VZD 00 DVD VERTICAL SHIFT ***
5VOF/6VOF 26 OSDVERTICAL SHIFT **
RED 20 BLACK LEVEL OFFSET:R **
GRN 20 BLACK LEVEL OFFSET:G **
WPR 1F WHITE POINT R **
WPG 1F WHITE POINT G **
WPB 1F WHITE POINT B **
DRED 00 DVD BLACK LEVEL OFFSET:R **
DGRN 50 DVD BLACK LEVEL OFFSET:R **
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SERVICE MANUAL
10
DWPR 00 DVD WHITE POINT R **
DWPG 00 DVD WHITE POINT G **
DWPB 00 DVD WHITE POINT B **
YDFP/YDFN/
YDFS/YDAV
07 LUMINANCE DELAY TIME #
TOP adjustable AGC TAKE OVER *
VOL 2A Volume control ***
VOLA 20 Dummy AVL level #
CORE 03 Core noise reduction #
HLOG 02 the horizontal position LOGO ***
VLG1 0A The first line vertical position of LOGO **
VLG2 0E The second line vertical position of LOGO **
COL1 04 The color of first line LOGO **
COL2 04 The color of second line LOGO **
TIME 0F The time of No signal auto off #
IFFS 03 IF 38MHZ/38.9MHZ ＃
HDOL 0A Cathode drive level ＃
AGC 03 AGC time #
VG2B 1A VG2 bright set ***
SBRI 24 Sub bright ***
MBRI 30 Max bright ***
SCON 20 Sub contrast ***
MCON 39 Max contrast ***
SCOL 32 Sub color ＃
OP1 AF Optional 1 ***
OP2 02 Optional 2 ***
OP3 09 Optional 3 ***
OP4 00 Optional 4 ***
OP5 00 Optional 5 ***
OP6 F6 Optional 6 ***
OP7 60 Optional 7 ***
OP8 18 Optional 8 ***
OP9 07 Optional 9 ***
INIT EEPROM init ＃
VG2 VG2 *
VSD VSD ＃
Table4 Optional Setup
BIT NAME DESCRIPTION DATA
0 OP_HOTEL Hotel model（1：yes，0：no） 1
1 OP_236 Channel number setup，1：236；0：100 1
2 OP_NTSC NTSC setup，1：yes，0：no 1
3 OP_AV2 2 AV input，1：2 AV input 1
4 OP_SVSH S-VIDEO input，1：yes，0：no 0
5 OP_DVD DVD input,1:yes,0:no 1
6 OP_SCART SCART ,1：yes；0：no 1
OP1
7 OP_OSO Switch off in vertical overscan 1
0 OP_AVL AVL，1：yes；0：no(slim crt) 0
1 OP_AUTO_SOUND AUTO SOUND 1
OP2
2 OP_NOT_1 Text language setup（OP_NOT_3/2/1）;（only for text） 0

SERVICE MANUAL
11
3 OP_NOT_2 0
4 OP_NOT_3 0
5 OP_USER_LOGO USER’S LOGO SETUP 0
6 OP_ON_BLACK 1：blue back，0：black back 0
7 OP_FSL 0
0 OP_ENGLISH 1: ENGLISH OSD,0:NO ENGLISH OSD 1
1 OP_CZECH 1: CZECH OSD,0:NO CZECH OSD 1
2 OP_SLOVAK 1: SLOVAK OSD,0:NO SLOVAK OSD 1
3 OP_RUSSIAN 1: RUSSIAN OSD,0:NO RUSSIAN OSD 1
4 OP_FRENCH 1: FRENCH OSD,0:NO FRENCH OSD 1
5 OP_GERMAN 1: GERMAN OSD,0:NO GERMAN OSD 1
6 OP_ITALY 1: ITALY OSD,0:NO ITALY OSD 1
OP3
7 OP_SPANISH 1: SPANISH OSD,0:NO SPANISH OSD 1
0 OP_PORTUGUESE 1: PORTUGUESE OSD,0:NO PORTUGUESE OSD 1
1 OP_SERBIAN 1: SERBIAN OSD,0:NO SERBIAN OSD 1
2 OP_TURKISH 1: TURKISH OSD,0:NO TURKISH OSD 1
3 OP_POLISH 1: POLISH OSD,0:NO POLISH OSD 1
4 OP_BULGARIAN 1: BULGARIAN OSD,0:NO BULGARIAN OSD 1
5 OP_ROMANIAN 1: ROMANIAN OSD,0:NO ROMANIAN OSD 1
6 OP_CROATIAN 1: CROATIAN OSD,0:NO CROATIAN OSD 1
OP4
7 OP_HUNGARIAN 1: HUNGARIAN OSD,0:NO HUNGARIAN OSD 1
0 OP_UKRAIN 1: UKRAIN OSD,0:NO UKRAIN OSD 1
1 OP_ARABIC 1: ARABIC OSD,0:NO ARABIC OSD 1
2 OP_FARSI 1: FARSI OSD,0:NO FARSI OSD 1
3 0
4 0
5 OP_RFTOAV 1:SCART, 0: RCA 0
6 OP_TDA1517 1： TDA1517
0: TFA9842AJ
0
OP5
7 OP_FAKE_AVL 0=AVL，1＝fake AVL 0
0 OP_AV_ON 1：AV shutdown,AV restart；0： TV restart 1
1 OP_DIRECT_SWITCH 1：memory-restart；0：power-on and standby 1
2 OP_HCO EHT tracking mode 0
3 OP_CHH_LOGO 1：changhong logo，0：no 0
4 OP_SOUND_DK D/K 1
5 OP_SOUND_BG B/G 1
6 OP_SOUND_I I 1
OP6
7 OP_SOUND_M M 1
0 OP_AUTO_LANGO 0
1 OP_AUTO_LANG1 0
2 OP_AUTO_LANG2 0
3 OP_AUTO_LANG3 0
4 OP_AUTO_LANG4
OP_AUTO_LANG4/3/2/1/0:
ENGLISH（00000）
CZECH（00001）
SLOVAK（00010）
…… 0
5 OP_FORF 1
6 OP_FORS
OP_FORS/FORF:
00-AUTO 60HZ,01-KEEP LAST,
10-FORCE 60HZ,11-AUTO 50HZ
1
OP7
7 OP_HOTEL_ON_PROG 1:Startup on channel 1（hotel model available） 0
0 OP_AUTO_TEST Power-on self-test ,1:yes,0,no 0
1 OP_PSNS sensibility 0
2 OP_BSCREEN Black screen：1 Yes;0:No 0
3 OP_SECAM SECAM selecctable，1:SECAM,0:no SECSM 1
OP8
4 OP_DFL Disable flash protection 1

SERVICE MANUAL
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5 OP_SIF 0
6 OP_EXT_SIF0 0
7 OP_EXT_SIF1 0
0 OP-TUNER 0：TAF5-E4I22
1：TAF5-C4I21
1
1 OP_TINT TINT adjustable 0
2 OP_FMWS WINDOW OF SOUND PLL:+/-200KHZ 1
3 OP_FMWS1 WINDOW OF SOUND PLL:+/-600KHZ 0
4 OP_OSVE Overscan vertical, 1:yes,0：no 0
5 OP_FFI 0
6 OP_SPEED1 Program quickly, 1:yes,0：no 0
OP9
7 OP_SPEED0 Program slowly, 1:yes,0：no 0
Notes:
The data sheet may differ dependent on different models.
The data sheet may differ dependent on different CRTs for the same model.

SERVICE MANUAL
13
STRUCTURE AND CHISSIS FUNCTION DESCRIPTION
1. STRUCTUE BLOCK DIAGRAM
Fig.4
Structure Block Diagram for ETE-2 Chassis Series

SERVICE MANUAL
14
2. CHASSIS DESCRIPTION
2.1 General Description
ETE-2 chassis is applied in PF21GB300 series.
By use of philips UOC for TV small signal processing and bus control, the chassis
enables TV tuning, adjustment, control and picture correction, featuring high-integration,
high-performance-to-price ratio and high-reliability and compact circuit with fewer external
components. The chassis, widely used in small and medium TVs, provides much more
convenience for manufacturing and technical service. It includes:
UOC TDA9384PS/N3/3 for PAL/NTSC /SECAM s m all signal processing and bus control
EEPROM AT24C08 for data memory
TDA4863AJ for vertical output power amplifying
TFA9842AJ for audio power amplifying
Thick-film IC STR-G5653 for power circuit adjustment and control
2.2 The following features are available in the chassis:
Color systems: PAL, NTSC,SECAM
Sound systems: D/K, B/G, I ,M
236 programs preset
AV stereo
I 2C bus control Electronic
program table
Intelligent lock
Biorhythm
2.3 The chassis mainly uses the following ICs and assemblies.
Table 5 Key ICs and Assemblies
Serial Type Description
Position
No.
1 N200 AT24C08 EERPOM
TDA9384PS/N3/3(slim crt) (Small signal processor +
2 N100 TDA9381PS/N3/3 etc. micro control unit (MCU))
3 N601 TFA9842AJ Audio power amplifier
4 N300 TDA4863AJ/TDA4864AJ Vertical scan output stage circuit
Switch-mode power supply
5 N801 STR-G5653 control
6 A001 TAF5-C4I21 /TAF5-E4I22 Tuner

SERVICE MANUAL
15
SERVICE DAT
1.TV signal processor TDA935X/6X/8X PS-N3 series
1.1 GENERAL DESCRIPTION
The various versions of the TDA935X/6X/8X/9X PS-N3 series combine the functions of a video processor together with
a -Controller and US Closed Caption decoder. Most versions have a Teletext decoder on board. The Teletext decoder
has an internal RAM memory for 1 or 10 page text. The ICs are intended to be used in economy television receivers with
90and 110picture tubes.
The ICs have supply voltages of 8 V and 3.3 V and they are mounted in an SDIP-64 envelope.
The features are given in the following feature list.
1.2 FEATURES TV processor
Available in TDA935X/6X/8X PS versions
·Multi-standard vision IF circuit with alignment-free PLL demodulator
·Internal (switchable) time-constant for the IF-AGC circuit
·The mono intercarrier sound circuit has a selective FM-PLL demodulator which can be switched to the different FM
sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this system is such that the external band-pass filters can be
omitted.
·The FM-PLL demodulator can be set to centre frequencies of 4.74/5.74 MHz so that a second sound channel can be
demodulated. In such an application it is necessary that an external band pass filter is inserted.
·Integrated chrominance trap circuit
·Integrated luminance delay line with adjustable delay time
·Picture improvement features with peaking (with switchable centre frequency, depeaking, variable positive/negative
overshoot ratio and video dependent coring) and blue- and black stretching. All features are available for CVBS, Y/C
and YPBPR signals.
·Tint control for external RGB/YPBPRsignals
·Integrated chroma band-pass filter with switchable centre frequency
·Only one reference (12 MHz) crystal required for the -Controller, Teletext- and the colour decoder
·Multi-standard colour decoder with automatic search system
·Internal base-band delay line
·Indication of the Signal-to-Noise ratio of the incoming CVBS signal
·A linear RGB/YUV/YPBPRinput with fast blanking for external RGB/YUV sources. The synchronisation circuit can be
connected to the incoming Y signal. The Text/OSD signals are internally supplied from the -Controller/Teletext decoder.
·RGB control circuit with ‘Continuous Cathode Calibration’, white point and black level off-set adjustment so that the
colour temperature of the dark and the light parts of the screen can be chosen independently.
·2 levels of contrast reduction of main picture possible during OSD/Text insertion (‘halftone’)
·OSD/Text gain reduction control
·Adjustable ‘wide blanking’ of the RGB outputs
·Horizontal synchronization with two control loops and alignment-free horizontal oscillator
·Vertical count-down circuit
·Vertical driver optimized for DC-coupled vertical output stages

Philips Semiconductors Tentative Device Specification
16
·Horizontal and vertical geometry processing
·Horizontal and vertical zoom function for 16: 9 applications
·Horizontal parallelogram and bow correction for large screen picture tubes
·Low-power start-up of the horizontal drive circuit
·Macrovision keying possibility for horizontal synchronisation.
Available in TDA935X/6X/8X PS versions
·A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF
amplifier.
·Source selection between the ‘internal’ CVBS and an external CVBS or Y/C signal
Controller
·80C51 -controller core standard instruction set and timing
·1 s machine cycle
·32 - 128Kx8-bit late programmed ROM
·3 - 12Kx8-bit Auxiliary RAM (shared with Display)
·Interrupt controller for individual enable/disable with two level priority
·Two 16-bit Timer/Counter registers
·One 16-bit Timer with 8-bit P re-scaler
·WatchDog timer
·Auxiliary RAM page pointer
·16-bit Data pointer
·Stand-by, Idle and Power Down modes
·14 bits PWM for Voltage Synthesis Tuning
·8-bit A/D converter
·4 multiplexed inputs for the A/D converter and 5 PWM (6-bits) outputs for control of TV analogue signals (TDA95XX
series)
·4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output (TDA93XX series)

Philips Semiconductors Tentative Device Specification
17
Data Capture
·Text memory for 1 or 10 pages
·In the 10 page versions inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle
Page Table (SPT)
·Data Capture for US Closed Caption
·Data Capture for 525/625 line WST, VPS (PDC system A) and Wide Screen Signalling (WSS) bit decoding
·Automatic selection between 525 WST/625 WST
·Automatic selection between 625 WST/VPS on line 16 of VBI
·Real-time capture and decoding for WST Teletext in Hardware, to enable optimized -processor throughput
·Automatic detection of FASTEXT transmission
·Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters
·Signal quality detector for video and WST/VPS data types
·Comprehensive teletext language coverage
·Full Field and Vertical Blanking Interval (VBI) data capture of WST data
Display
·Teletext and Enhanced OSD modes
·Features of level 1.5 WST and US Close Caption
·Serial and Parallel Display Attributes
·Single/Double/Quadruple Width and Height for characters
·Scrolling of display region
·Variable flash rate controlled by software
·Enhanced display features including overlining, underlining and italics
·Soft colours using CLUT with 4096 colour palette
·Globally selectable scan lines per row (9/10/13/16) and character matrix [12x10, 12x13, 12x16 (VxH)]
·Fringing (Shadow) selectable from N-S-E-W direction
·Fringe colour selectable
·Meshing of defined area
·Contrast reduction of defined area
·Cursor
·Special Graphics Characters with two planes, allowing four colours per character
·32 software redefinable On-Screen display characters
·4 WST Character sets (G0/G2) in single device (e.g. Latin, Cyrillic, Greek, Arabic)
·G1 Mosaic graphics, Limited G3 Line drawing characters
·WST Character sets and Closed Caption Character set in single

Philips Semiconductors Tentative Device Specification
18
QUICK REFERENCE DATA Table 6
SYMBOL PARAMETER MIN. TYP. MAX. UNIT
Supply
VPsupply voltages 8.0/3.3 V
IPsupply current (VP= 8 V) 135 mA
IPsupply current (VP= 3.3 V) 60 mA
Input voltages
ViVIFrms) video IF amplifier sensitivity (RMS value) 75 V
ViSIF(rms) QSS sound IF amplifier sensitivity (RMS value) 45 dB V
ViAUDIO(rms) external audio input (RMS value) 500 mV
ViCVBS(p-p) external CVBS/Y input (peak-to-peak value) 1.0 V
ViCHROMA(p-p) external chroma input voltage (burst amplitude)
(peak-to-peak value) 0.3 V
ViRGB(p-p) RGB inputs (peak-to-peak value) 0.7 V
ViY(p-p) luminance input signal (peak-to-peak value) 1.4 / 1.0 V
ViU(p-p) /
ViPB(p-p)
U / PBinput signal (peak-to-peak value) 1.33 /
+0.7 V
ViV(p-p) /
ViPR(p-p)
V / PRinput signal (peak-to-peak value) 1.05 /
+0.7 V
Output signals
Vo(IFVO)(p-p) demodulated CVBS output (peak-to-peak value) 2.0 V
Vo(QSSO)(rms) sound IF intercarrier output in QSS versions (RMS value) 100 mV
Vo(AMOUT)(rms) demodulated AM sound output in QSS versions (RMS
value) 500 mV
Vo(CVBSO)(p-p) selected CVBS output (peak-to-peak value) 2.0 V
tuner AGC output current range 0 5 mA
Io(AGCOUT)
VoRGB(p-p) RGB output signal amplitudes (peak-to-peak value) 2.0 V
horizontal output current 10
IoHOUT mA
IoVERT vertical output current (peak-to-peak value) 1 mA
IoEWD EW drive output current 1.2 mA