Teac TFT IDTV User manual

TEAC 22” TFT IDTV
SERVICE MANUAL

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22” TFT TV Service Manual 13/10/2004
TABLE OF CONTENTS
1. INTRODUCTION ...................................................................................................................................... 1
2. TUNER...................................................................................................................................................... 1
3. IF PART (TDA988X) ................................................................................................................................. 1
4. MULTI STANDARD SOUND PROCESSOR ............................................................................................ 1
5. AUDIO AMPLIFIER STAGE WITH AN7522............................................................................................. 2
6. POWER .................................................................................................................................................... 2
7. MICROCONTROLLER SDA55XX............................................................................................................ 2
7.1. General Features .................................................................................................................................. 2
7.2. External Crystal and Programmable Clock Speed ............................................................................... 2
7.3. Microcontroller Features ....................................................................................................................... 2
7.4. Memory ................................................................................................................................................. 2
7.5. Display Features ................................................................................................................................... 2
7.6. ROM Characters ................................................................................................................................... 3
7.7. Acquisition Features.............................................................................................................................. 3
7.8. Ports...................................................................................................................................................... 3
8. SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16 .................................................................. 3
9. CLASS AB STEREO HEADPHONE DRIVER TDA1308 .........................................................................3
10. SAW FILTERS.......................................................................................................................................... 3
11. IC DESCRIPTIONS (FOR ANALOG) ....................................................................................................... 4
11.1. LM1117.............................................................................................................................................. 4
11.1.1. General Description................................................................................................................. 4
11.1.2. Features .................................................................................................................................... 4
11.1.3. Applications.............................................................................................................................. 4
11.1.4. Connection Diagrams.............................................................................................................. 4
11.2. LM2576.............................................................................................................................................. 5
11.2.1. General Description................................................................................................................. 5
11.2.2. Features .................................................................................................................................... 5
11.2.3. Pin description ......................................................................................................................... 5
11.3. LM317T ............................................................................................................................................. 6
11.3.1. Description................................................................................................................................6
11.3.2. Features .................................................................................................................................... 6
11.4. TFMS5360......................................................................................................................................... 6
11.4.1. Description................................................................................................................................6
11.4.2. Features .................................................................................................................................... 6
11.5. ST24LC21 ......................................................................................................................................... 7
11.5.1. Description................................................................................................................................7
11.5.2. Features .................................................................................................................................... 7
11.5.3. Pin connections........................................................................................................................ 7
11.6. SST37VF040 ..................................................................................................................................... 8
11.6.1. Description................................................................................................................................8
11.6.2. Features .................................................................................................................................... 8
11.6.3. Pin Description......................................................................................................................... 8
11.7. TEA5114A ......................................................................................................................................... 9
11.7.1. General description ................................................................................................................. 9
11.7.2. Features .................................................................................................................................... 9
11.7.3. Pin Connections....................................................................................................................... 9
11.8. TEA6415.......................................................................................................................................... 10
11.8.1. General description ............................................................................................................... 10
11.8.2. 13.5.2.Features ....................................................................................................................... 10
11.8.3. 13.5.3.Pinning......................................................................................................................... 10
11.9. VPC3230D....................................................................................................................................... 11
11.9.1. General Description............................................................................................................... 11
11.9.2. Pin Connections and Short Descriptions............................................................................ 11
11.10. SDA55XX (SDA5550)...................................................................................................................... 13
11.10.1. General description ............................................................................................................... 13
11.11. TDA9885/86 .................................................................................................................................... 14
11.11.1. General description ............................................................................................................... 14

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22” TFT TV Service Manual 13/10/2004
11.11.2. Features .................................................................................................................................. 14
11.11.3. Pinning.................................................................................................................................... 14
11.12. TDA1308 ......................................................................................................................................... 15
11.12.1. General Description............................................................................................................... 15
11.12.2. Features .................................................................................................................................. 15
11.12.3. Pinning.................................................................................................................................... 15
11.13. AN7522N ......................................................................................................................................... 15
11.13.1. General description ............................................................................................................... 15
11.13.2. Pin Descriptions..................................................................................................................... 15
11.14. PI5V330........................................................................................................................................... 16
11.14.1. General description ............................................................................................................... 16
11.14.2. Features .................................................................................................................................. 16
11.14.3. Pin Descriptions..................................................................................................................... 16
11.15. GM6015........................................................................................................................................... 17
11.15.1. General description ............................................................................................................... 17
11.15.2. Features .................................................................................................................................. 17
11.16. SAA3010T ....................................................................................................................................... 18
11.16.1. Description.............................................................................................................................. 18
11.16.2. Features .................................................................................................................................. 18
11.16.3. Pinning.................................................................................................................................... 18
11.17. AD9883A ......................................................................................................................................... 19
11.17.1. General description ............................................................................................................... 19
11.17.2. Features .................................................................................................................................. 19
11.17.3. Pin Descriptions..................................................................................................................... 19
11.18. MC141585 ....................................................................................................................................... 22
11.18.1. General description ............................................................................................................... 22
11.18.2. Features .................................................................................................................................. 22
11.18.3. Pin Description....................................................................................................................... 22
11.19. MC34063 ......................................................................................................................................... 24
11.19.1. Description.............................................................................................................................. 24
11.19.2. Features .................................................................................................................................. 24
11.19.3. Pin connections...................................................................................................................... 24
11.20. MSP34X0G...................................................................................................................................... 25
11.20.1. Introduction ............................................................................................................................ 25
11.20.2. Features .................................................................................................................................. 25
11.20.3. Pin connections...................................................................................................................... 26
11.21. DS90C385 ....................................................................................................................................... 28
11.21.1. General Description............................................................................................................... 28
11.21.2. Features .................................................................................................................................. 28
11.21.3. Pin Descriptions..................................................................................................................... 28
11.22. 4053B .............................................................................................................................................. 31
11.22.1. General Description............................................................................................................... 31
11.22.2. Pin Description....................................................................................................................... 31
11.23. 24C16 .............................................................................................................................................. 32
11.23.1. General Description............................................................................................................... 32
11.23.2. Features .................................................................................................................................. 32
11.23.3. Pin Description....................................................................................................................... 32
11.24. 74LX1G86STR ................................................................................................................................ 33
11.24.1. General Description............................................................................................................... 33
11.24.2. Features .................................................................................................................................. 33
11.24.3. Pin Description....................................................................................................................... 33
11.25. IRF7314........................................................................................................................................... 34
11.25.1. General Description............................................................................................................... 34
11.25.2. Features .................................................................................................................................. 34
11.25.3. Pin Description....................................................................................................................... 34
12. IC DESCRIPTIONS (FOR DIGITAL) ...................................................................................................... 35
12.1. STI5518 ........................................................................................................................................... 35
12.1.1. General Description............................................................................................................... 35
12.2. MAX232_SMD................................................................................................................................. 35
12.2.1. General Description............................................................................................................... 35

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22” TFT TV Service Manual 13/10/2004
12.2.2. Features .................................................................................................................................. 35
12.3. 74HCU04......................................................................................................................................... 36
12.3.1. General Description............................................................................................................... 36
12.3.2. Pin Description....................................................................................................................... 36
12.4. TSH22 ............................................................................................................................................. 37
12.4.1. General Description............................................................................................................... 37
12.4.2. Pin Connections..................................................................................................................... 37
12.5. CS4334............................................................................................................................................ 37
12.5.1. General Description............................................................................................................... 37
12.5.2. Features .................................................................................................................................. 37
12.6. AMIC A43L2616 .............................................................................................................................. 38
12.6.1. General Description............................................................................................................... 38
12.6.2. Features .................................................................................................................................. 38
12.6.3. Pin Description....................................................................................................................... 38
12.7. MX29LV160T................................................................................................................................... 40
12.7.1. General Description............................................................................................................... 40
12.7.2. Features .................................................................................................................................. 40
12.7.3. Pin Description....................................................................................................................... 40
12.8. 24C32 .............................................................................................................................................. 41
12.8.1. General Description............................................................................................................... 41
12.8.2. Features .................................................................................................................................. 41
12.8.3. Pin Description....................................................................................................................... 41
12.9. STV0360.......................................................................................................................................... 42
12.9.1. General Description............................................................................................................... 42
12.9.2. Features .................................................................................................................................. 42
12.9.3. Pin Description....................................................................................................................... 42
12.10. MAX809........................................................................................................................................... 45
12.10.1. General Description............................................................................................................... 45
12.10.2. Features .................................................................................................................................. 45
12.10.3. Pin Description....................................................................................................................... 45
12.11. TDCC2345TV39A............................................................................................................................ 46
12.11.1. General Description............................................................................................................... 46
12.11.2. Pin Description....................................................................................................................... 46
13. SERVICE MENU SETTINGS ................................................................................................................. 47
13.1. ADJUST MENU SETTINGS............................................................................................................47
13.2. OPTIONS MENU SETTINGS..........................................................................................................48
13.3. APS WSS TEST MENU .................................................................................................................. 53
14. BLOCK DIAGRAMS ............................................................................................................................... 54
14.1. ANALOG.......................................................................................................................................... 54
14.2. DIGITAL........................................................................................................................................... 58
15. CIRCUIT DIAGRAMS............................................................................................................................. 59
15.1. ANALOG.......................................................................................................................................... 59
15.2. DIGITAL........................................................................................................................................... 68

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22” TFT TV Service Manual 13/10/2004
1. INTRODUCTION
22” TFT-LCD IDTV is a Progressive TV control system based on the µ-controller SDA555X, with built-in
de-interlacer and scaler. It is designed to deliver digital quality pictures without the need of a separate
digital terrestrial receiver.
TFT IDTV is a progressive scan flicker free colour television with PC input, driving an WXGA (1280*720)
panel with 16:9 aspect ratio. The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour
standards and multiple transmission standards as B/G, D/K, I/I’, and L/L´. Sound system output is
supplying 2x3W (10%THD) for left and right outputs of 16speakers. The chassis is equipped with two full
SCART’s, one front-AV, one SVHS, one D-Sub 15 (PC) input, one PC stereo audio input and one line out
(left and right) and one HP outputs.
2. TUNER
As the thickness of the TV set has a limit, a horizontal mounted tuner is used in the product, which is
suitable for CCIR systems B/G, H, L, L´, I/I´, and D/K. The tuning is available through the digitally
controlled I2C bus (PLL). Below you will find info on the Tuner in use.
General description of UV1316:
The UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to meet a wide range of
applications. It is a combined VHF, UHF tuner suitable for CCIR systems B/G, H, L, L’, I and I’. The low IF
output impedance has been designed for direct drive of a wide variety of SAW filters with sufficient
suppression of triple transient.
Features of UV1316:
1. Member of the UV1300 family small sized UHF/VHF tuners
2. Systems CCIR: B/G, H, L, L’, I and I’; OIRT: D/K
3. Digitally controlled (PLL) tuning via I2C-bus
4. Off-air channels, S-cable channels and Hyper band
5. Compact size
6. Complies to “CENELEC EN55020” and “EN55013”
Pinning:
1. Gain control voltage (AGC) : 4.0V, Max: 4.5V
2. Tuning voltage
3. I²C-bus address select : Max: 5.5V
4. I²C-bus serial clock : Min:-0.3V, Max: 5.5V
5. I²C-bus serial data : Min:-0.3V, Max: 5.5V
6. Not connected
7. PLL supply voltage : 5.0V, Min: 4.75V, Max: 5.5V
8. ADC input
9. Tuner supply voltage : 33V, Min: 30V, Max: 35V
10. Symmetrical IF output 1
11. Symmetrical IF output 2
3. IF PART (TDA988X)
The TDA9885 is an alignment-free single standard (without positive modulation) vision and sound IF signal
PLL.
The TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal
PLL demodulator for positive and negative modulation including sound AM and FM processing.
Both devices can be used for TV, VTR, PC and set-top box applications.
4. MULTI STANDARD SOUND PROCESSOR
The MSP34x0G family of single-chip Multistandard Sound Processors covers the sound processing of all
analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV sound
processing, starting with analog sound IF signal-in, down to processed analog AF-out, is performed on a
single chip.
These TV sound processing ICs include versions for processing the multichannel television sound (MTS)
signal conforming to the standard recommended by the Broadcast Television Systems Committee (BTSC).
The DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed alignment free.
Other processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio
standard.
Current ICs have to perform adjustment procedures in order to achieve good stereo separation for BTSC
and EIA-J. The MSP 34x1G has optimum stereo performance without any adjustments.

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22” TFT TV Service Manual 13/10/2004
5. AUDIO AMPLIFIER STAGE WITH AN7522
The AN7522 is an audio class-AB amplifier assembled in SIL-12 Pin Plastic Package specially designed
for sound cards application. Using this IC chassis operates as a stereo TV set. AN7522 has stand-by
feature for low stand-by power consumption and mute feature for pop noise free opening and closing the
TV set. It can deliver 2*3W without clipping at 12V/16applications.
6. POWER
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient
design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving
a 3.0A load with excellent line and load regulation. Two different versions (one having a fixed output
voltage of 3.3 V, and one with 5.0 V) of this IC are used in the regulator board.
7. MICROCONTROLLER SDA55XX
7.1. General Features
• Feature selection via special function register
• Simultaneous reception of TTX, VPS, PDC, and WSS (line 23)
• Supply Voltage 2.5 and 3.3 V
• ROM version is used.
7.2. External Crystal and Programmable Clock Speed
• Single external 6MHz crystal, all necessary clocks are generated internally
• CPU clock speed selectable via special function registers.
• Normal Mode 33.33 MHz CPU clock, Power Save mode 8.33 MHz
7.3. Microcontroller Features
• 8bit 8051 instruction set compatible CPU.
• 33.33-MHz internal clock (max.)
• 0.360 µs (min.) instruction cycle
• Two 16-bit timers
• Watchdog timer
• Capture compare timer for infrared remote control decoding
• Pulse width modulation unit (2 channels 14 bit, 6 channels 8 bit)
• ADC (4 channels, 8 bit)
• UART (rxd, txd)
7.4. Memory
• Up to 128 Kilobyte on Chip Program ROM
• Eight 16-bit data pointer registers (DPTR)
• 256-bytes on-chip Processor Internal RAM (IRAM)
• 128bytes extended stack memory.
• Display RAM and TXT/VPS/PDC/WSS-Acquisition-Buffer directly accessible via MOVX
• UP to 16KByte on Chip Extended RAM (XRAM) consisting of;
- 1 Kilobyte on-chip ACQ-buffer-RAM (access via MOVX)
- 1 Kilobyte on-chip extended-RAM (XRAM, access via MOVX) for user software
- 3-Kilobyte Display Memory
7.5. Display Features
• ROM Character set supports all East and West European Languages in single device
• Mosaic Graphic Character Set
• Parallel Display Attributes
• Single/Double Width/Height of Characters
• Variable Flash Rate
• Programmable Screen Size (25 Rows x 33...64 Columns)
• Flexible Character Matrixes (HxV) 12 x 9...16
• Up to 256 Dynamical Redefinable Characters in standard mode; 1024 Dynamical Redefinable Characters
in Enhanced Mode
• CLUT with up to 4096 colour combinations
• Up to 16 Colours per DRCS Character
• One out of 8 Colours for Foreground and Background Colours for 1-bit DRCS and ROM Characters

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22” TFT TV Service Manual 13/10/2004
7.6. ROM Characters
• Shadowing
• Contrast Reduction
• Pixel by Pixel Shiftable Cursor With up to 4 Different Colours
• Support of Progressive Scan and 100 Hz.
• 3 X 4Bits RGB-DACs On-Chip
• Free Programmable Pixel Clock from 10 MHz to 32MHz
• Pixel Clock Independent from CPU Clock
• Multinorm H/V-Display Synchronisation in Master or Slave Mode
7.7. Acquisition Features
• Multistandard Digital Data Slicer
• Parallel Multi-norm Slicing (TTX, VPS, WSS, CC, G+)
• Four Different Framing Codes Available
• Data Caption only limited by available Memory
• Programmable VBI-buffer
• Full Channel Data Slicing Supported
• Fully Digital Signal Processing
• Noise Measurement and Controlled Noise Compensation
• Attenuation Measurement and Compensation
• Group Delay Measurement and Compensation
• Exact Decoding of Echo Disturbed Signals
7.8. Ports
• One 8-bit I/O-port with open drain output and optional I 2 C Bus emulation support (Port0)
• Two 8-bit multifunction I/O-ports (Port1, Port3)
• One 4-bit port working as digital or analogue inputs for the ADC (Port2)
• One 2-bit I/O port with secondary function (P4.2, 4.3, 4.7)
• One 4-bit I/O-port with secondary function (P4.0, 4.1, 4.4) (Not available in P-SDIP 52)
8. SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16
The ST24C16 is a 16Kbit electrically erasable programmable memory (EEPROM), organised as 8 blocks
of 256*8 bits. The memory is compatible with the I²C standard, two wire serial interface, which uses a bi-
directional data bus and serial clock. The memory carries a built-in 4 bit, unique device identification code
(1010) corresponding to the I²C bus definition. This is used together with 1 chip enable input (E) so that up
to 2*8K devices may be attached to the I²C bus and selected individually.
9. CLASS AB STEREO HEADPHONE DRIVER TDA1308
The TDA1308 is an integrated class AB stereo headphone driver contained in a DIP8 plastic package. The
device is fabricated in a 1 mm CMOS process and has been primarily developed for portable digital audio
applications.
10.SAW FILTERS
K3953M is an IF Filter for Video Applications. The package is SIP5K. Supported standards are B/G, D/K, I,
L/L’.
K9656M is an IF Filter for Audio Applications. The package is SIP5K. Supported standards are B/G, D/K, I,
L/L’.

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22” TFT TV Service Manual 13/10/2004
11.IC DESCRIPTIONS (FOR ANALOG)
LM1117 PI5V330
LM2576 GM6015
LM317T SAA3010T
TFMS5360 AD9883A
ST24LC21 MC141585
SST37VF040 MC34063
TEA5114A MSP3410G
TEA6415 DS90C385
VPC3230D 4053B
SDA55XX 24C16
TDA9885/86 74LX1G86STR
TDA1308T IRF7314
AN7522N
11.1. LM1117
11.1.1. General Description
The LM1117 is a series of low dropout voltage regulators with a dropout of 1.2V at 800mA of load current.
It has the same pin-out as National Semiconductor’s industry standard LM317. The LM1117 is available in
an adjustable version, which can set the output voltage from 1.25V to 13.8V with only two external
resistors. In addition, it is also available in five fixed voltages, 1.8V, 2.5V, 2.85V, 3.3V, and 5V.
The LM1117 offers current limiting and thermal shutdown. Its circuit includes a zener trimmed bandgap
reference to as-sure output voltage accuracy to within ±1%. The LM1117 series is available in SOT-223,
TO-220, and TO-252 D-PAK packages. A minimum of 10µF tantalum capacitor is required at the output to
improve the transient response and stability.
11.1.2. Features
• Available in 1.8V, 2.5V, 2.85V, 3.3V, 5V, and Adjustable Versions
• Space Saving SOT-223 Package
• Current Limiting and Thermal Protection
• Output Current 800mA
• Line Regulation 0.2% (Max)
• Load Regulation 0.4% (Max)
• Temperature Range
LM1117 0°C to 125°C
LM1117I -40°C to 125°C
11.1.3. Applications
• 2.85V Model for SCSI-2 Active Termination
• Post Regulator for Switching DC/DC Converter
• High Efficiency Linear Regulators
• Battery Charger
• Battery Powered Instrumentation
11.1.4. Connection Diagrams

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22” TFT TV Service Manual 13/10/2004
11.2. LM2576
11.2.1. General Description
The LM2576 series of regulators are monolithic integrated circuits ideally suited for easy and convenient
design of a step–down switching regulator (buck converter). All circuits of this series are capable of driving
a 3.0 A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output
version. These regulators were designed to minimize the number of external components to simplify the
power supply design. Standard series of inductors optimized for use with the LM2576 are offered by
several different inductor manufacturers.
Since the LM2576 converter is a switch–mode power supply, its efficiency is significantly higher in
comparison with popular three–terminal linear regulators, especially with higher input voltages. In many
cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically.
A standard series of inductors optimized for use with the LM2576 are available from several different
manufacturers. This feature greatly simplifies the design of switch–mode power supplies.
The LM2576 features include a guaranteed ±4% tolerance on output voltage within specified input voltages
and output load conditions, and ±10% on the oscillator frequency (±2% over 0°C to 125°C). External
shutdown is included, featuring 80 mA (typical) standby current. The output switch includes cycle–by–cycle
current limiting, as well as
thermal shutdown for full protection under fault conditions.
11.2.2. Features
• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions
• Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% Maximum Over Line and Load Conditions
• Guaranteed 3.0 A Output Current
• Wide Input Voltage Range
• Requires Only 4 External Components
• 52 kHz Fixed Frequency Internal Oscillator
• TTL Shutdown Capability, Low Power Standby Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• Moisture Sensitivity Level (MSL) Equals 1
11.2.3. Pin description

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22” TFT TV Service Manual 13/10/2004
11.3. LM317T
11.3.1. Description
The LM317T is an adjustable 3 terminal positive voltage regulator capable of supplying in excess of 1.5
amps over an output range of 1.25 to 37 volts. This voltage regulator is exceptionally easy to use and
requires only two external resistors to set the output voltage. Further, it employs internal current limiting,
thermal shutdown and safe area compensation, making it essentially blow–out proof. The LM317 serves a
wide variety of applications including local, on card regulation. This device can also be used to make a
programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the
LM317 can be used as a precision current regulator.
11.3.2. Features
• Output Current in Excess of 1.5 A
• Output Adjustable between 1.2 V and 37 V
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting Constant with Temperature
• Output Transistor Safe–Area Compensation
• Floating Operation for High Voltage Applications
• Available in Surface Mount D2PAK, and Standard 3–Lead Transistor Package
• Eliminates Stocking many Fixed Voltages
11.4. TFMS5360
11.4.1. Description
The TFMS5360 is a miniature receiver for infrared remote control systems.
11.4.2. Features
• Photo detector and preamplifier in one.
• 36 KHZ
• Pin diode and preamp
• IR filter.