Teac CT-W2850S1 Service Manual
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Teac CT-W2850S1 Service Manual

Teac CT-W2850S1 Service Manual

16:19 ctv 11ak33 chassis
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SERVICE MANUAL

CTW2850S1
16:19 CTV
11AK33 CHASSIS
JUN03
SERVCTW2850S1

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Summary of Contents for Teac CT-W2850S1

  • Page 1: Service Manual

    SERVICE MANUAL CTW2850S1 16:19 CTV 11AK33 CHASSIS JUN03 SERVCTW2850S1...
  • Page 2 11 AK-33 Service Manual...

  • Page 3: Table Of Contents

    1. INTRODUCTION ________________________________________________4 2. SMALL SIGNAL PART WITH TDA8885 _____________________________4 2.1. Vision IF amplifier _________________________________________________ 4 2.2. Video Switches _____________________________________________________ 5 2.3. Sound Circuit______________________________________________________ 5 2.4. Synchronisation circuit ______________________________________________ 5 2.5. Chroma and Luminance processing ___________________________________ 6 2.6. Colour Decoder ____________________________________________________ 6 2.7.
  • Page 4 16.2. UV1315, UV1316 ________________________________________________ 15 16.2.1. General description of UV1315: __________________________________________15 16.2.2. Features of UV1315: ___________________________________________________15 16.2.3. General description of UV1316: __________________________________________15 16.2.4. Features of UV1316: ___________________________________________________15 16.3. TEA6415C:_____________________________________________________ 16 16.3.1. General Description: ___________________________________________________16 16.3.2. Features: ____________________________________________________________16 16.4. TDA7265: ______________________________________________________ 17 16.4.1.

  • Page 5: Introduction

    AK33 CHASSIS MANUAL ADJUSTMENTS PROCEDURE ___________26 INTRODUCTION 11AK33 is a 110ø chassis capable of driving 28-29”,32”,33” tubes at appropriate currents The chassis is Frequency Controlled Tuning (PLL) and control system for multi-standard TV receivers with on- screen-display (OSD) for all relevant control functions. The system is based on the ‘ one-chip’ I C bus controlled video processing / deflection IC TDA8885 which also controls sound.

  • Page 6: Video Switches

    the system switches automatically to a gated black level AGC. Because a black level clamp pulse is required for this way of operation the circuit will only switch to black level AGC in the internal mode. The circuit contains a video identification circuit, which is independent of the synchronisation circuit. Therefore search tuning is possible when the display section of the receiver is used as a monitor.

  • Page 7: Chroma And Luminance Processing

    can be forced by the I 2 C-bus (fast or slow). If required the IC can select the time-constant depending on the noise content of the incoming video signal. The horizontal output signal is generated by means of a second loop, which compares the phase of the internal oscillator signal with the phase of the incoming flyback pulse.

  • Page 8: Picture Improvement Features

    Automatic Colour Limiting (ACL) circuit which is switchable via the I 2 C-bus and which prevents that oversaturation occurs when signals with a high chroma-to-burst ratio are received. The ACL circuit is designed such that it only reduces the chroma signal and not the burst signal. This has the advantage that the colour sensitivity is not affected by this function.

  • Page 9: East - West Output Stage

    The black current stabilisation system checks the output level of the 3 channels and indicates whether the black level of the highest output is in a certain window (WBC-bit) or below or above this window (HBC-bit). This indication can be read from the I C-bus and can be used for automatic adjustment of the Vg2 voltage during the production of the TV receiver.

  • Page 10: Video Switch Tea6415C

    Mid Band E5 to E12 175.25 to 224.25 S09 to S38 161.25 to 439.25 High Band E21 to E69 471.25 to 855.25 (2) S39 to S41 447.25 to 463.25 (1). Enough margin is available to tune down to 45.25 MHz. (2).

  • Page 11: Vertical Output Stage With Stv 9379

    VERTICAL OUTPUT STAGE WITH STV 9379 The IC TDA9379FA is the vertical deflection booster circuit. Two supply voltages, +12V and –12V are needed to scan the inputs VERT+ and VERT-, respectively. And a third supply voltage, +45V for the flyback limiting are needed. The vertical deflection coil is connected in series between the output and feedback to the input.

  • Page 12: Memory

    Memory 12.4. • Non-multiplexed 8-bit data and 16 … 20-bit address bus (ROMless Version) • Memory banking up to 1Mbyte (ROMless version) • Up to 128 Kilobyte on Chip Program ROM • Eight 16-bit data pointer registers (DPTR) • 256-bytes on-chip Processor Internal RAM (IRAM) •...

  • Page 13: 13. Serial Access Cmos 8K (1024*8) Eeprom St24C08

    13. SERIAL ACCESS CMOS 8K (1024*8) EEPROM ST24C08 The ST24C08 is a 8Kbit electrically erasable programmable memory (EEPROM), organised as 4 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.

  • Page 14: Pin Description

    • Colour decoder which needs only one 12 MHz reference crystal (or external clock signal) for all standards • Blanking of the ‘ helper signals’ for PAL and EDTV-2 PLUS • Several picture improvement features. • Internal base-band delay line •...
  • Page 15 internal CVBS input ground 1 (colour decoder and synchronisation) CVBS-2 output audio out (volume controlled) / IF video out AM audio output (volume controlled) SECAM PLL decoupling CVBS/Y 2 input black-current input blue output green output red output beam current limiter input/V-guard input red input for insertion green input for insertion blue input for insertion...

  • Page 16: Uv1315, Uv1316

    ? U output/input voltage (peak-to-peak value) 1.33 o(UO/I)(p-p) Y output/input voltage (peak-to-peak value) o(YO/I)(p-p) RGB output signal amplitudes (peak-to-peak value) o(RGB)(p-p) horizontal output current o(HOUT) vertical output current (peak-to-peak value) o(VERT) EW drive output current o(EWD) UV1315, UV1316 16.2. General description of UV1315: 16.2.1.

  • Page 17: Tea6415C

    • Compact size • Complies to “CENELEC EN55020” and “EN55013” PINNING PIN VALUE 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.

  • Page 18: Tda7265

    TDA7265: 16.4. The TDA7265 is a 25W+25W stereo sound amplifier with mute/stand-by facility. STPA control signal coming from microcontroller (when it is at high level) activates the mute function. IC is muted when mute port is at low level. Two stereo audio signals coming from audio module is injected to the inputs of the IC and a power of 12Wrms (10%) is obtained.

  • Page 19: Hct 32

    6. Supply voltage :200VDC 7. Cathode output 3 :20mA, 100Vpp 8. Cathode output 2 :20mA, 100Vpp 9. Cathode output 1 :20mA, 100Vpp 74 HCT 32 16.6. The 74HC/HCT32 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL).

  • Page 20: Sda5555

    3. Control Input Min: 7.5V Max.: 18V 4. Ground Iout 2A during scan 1.2A during flyback 5. Driver Output resistor 8.5 Ohm sink 15 Ohm source typ. 6. Supply voltage Max:16V (Operating range 6.6V-13V) 7. No connection 8. Line Voltage Min:50V Max:500V SDA5555: 16.8.

  • Page 21: Tda9181

    39 OSD-Green output 0.7 Vpp to 1.2 Vpp 40 OSD-Blue output 0.7 Vpp to 1.2 Vpp 41 OSD-Blanking output Low Level : 0V High Level : 3.3 V 42 Digital supply voltage 2.5 V 43 Ground 44 Digital supply voltage 3.3 V 45 PAL / SECAM Low Level : 0V...

  • Page 22: Tcd1102

    -Chrominance input signal (p-p) Cin=1.0V(max) TCD1102: 16.10. Description 16.10.1. The TCET110./ TCET2100/ TCET4100 consists of a phototransistor optically coupled to a gallium arsenide infrared emitting diode in a 4-lead plastic dual inline package. The elements are mounted on one leadframe using a coplanar technique, providing a fixed distances between input and output for highest safety requirements.

  • Page 23: Tda1308

    • Page write (up to 16 bytes) • Byte, random and sequential read modes • Self timed programming cycle PINNING PIN VALUE 1. Write protect enable (Ground) : 0V 2. Not connected (Ground) : 0V 3. Chip enable input (Ground) : 0V 4.

  • Page 24: General Description

    GENERAL DESCRIPTION 16.13.2. The PCF8583 is a clock/calendar circuit based on a 2048-bit static CMOS RAM organised as 256 words by 8 bits. Addresses and data are transferred serially via the two-line bi-directional I C-bus. The built-in word address register is incremented automatically after each written or read data byte. Address pin A0 is used for programming the hardware address, allowing the connection of two devices to the bus without additional hardware.

  • Page 25: Stv9379

    Pin4=Current Sense Input Pin5=Synchronization Input Pin6=GND Pin7=Gate Drive Pin8=Vcc STV9379: 16.15. DESCRIPTION 16.15.1. Designed for monitors and high performance TVs, the STV9379FA vertical deflection booster can handle flyback voltage up to 90V. Further to this, it is possible to have a flyback voltage, which is more than the double of the supply (Pin 2).
  • Page 26 Additional pair of D/A converters for SCART2 out Improved over-sampling filters (as in MSP 3400C) Additional SCART input Full SCART in/out matrix without restrictions SCART volume in dB units (optional) Additional I²S input (as in MSP 3400C) New FM-identification (as in MSP 3400C) Demodulator short programming Auto-detection for terrestrial TV-sound standards Precise bit-error rate indication...

  • Page 27: Lm358N

    LM358N: 16.17. General Description 16.17.1. The LM158 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.
  • Page 28 Connect 38.9 MHz test pattern for PAL B/G, PAL-SECAM B/G, 39.5 MHz test pattern for PAL I or 45.75 MHz test pattern for PAL M/N, NTSC M model to Z401 SAW filter input terminals. Change the IF-PLL Negative parameter until you see IN, DOWN below.
  • Page 29 Enter a CROSS-HATCH B/G test pattern via RF. Change vertical slope till the size of squares on both the upper and lower part of test pattern become equal to the squares laying on the vertical centre of the test pattern. Check and readjust VERTICAL SLOPE item if the adjustment becomes improper after some other geometric adjustments are done.
  • Page 30 **remark that some adjustments are fixed to default values in order to get correct geometry in all picture modes(4:3,16:9,Cinema,Subtitle,Super zoom)
  • Page 31 G E N E R A L B L O C K D I A G R A M O F C H A S S IS 11 A K 3 3 V I D E O P R O C E S S O R T U N E R R G B A M P L I F I E R T D A 8 8 8 X H...
  • Page 32 SPARE PARTS LIST 10015332 2850W*TEAC TEAC CTW2850S(AK33)SILVER BOM Date : 11/09/2002 COMPONENT MATERIAL POSITION NUMBER PRICE CUR CHK CODE ELECTRONICS 20000849 FUSE ASSY.TK79-A (3.15A) 0,0434 MD.ASY.SB16-AV&SVHS&HP 20011486 2,1288 (AK18) ON/OFF AS.110°(32- 20036465 1,2056 33")(2.2/AU)(W/MAKARON MD.ASY.TB285X-W 2850/51W 20060968 1,1781 5SW 19PRO CRT B.ASSY.TP33 (AK33)
  • Page 33 30000144 CAP MKP 22NF 630V J C616 0,1100 30000151 CAP MKP 3.3NF 2KV %3.5 C611 0,1600 30000153 CAP MKP 330NF 400V J C105 0,1400 30000160 CAP MKP 47NF 250V J C612 0,0900 30000161 CAP MKP 47NF 630V J C114 0,1400 30000162 CAP MKP 470NF 250V J C617...
  • Page 34 C906 30000351 CAP EL 10UF 350V M C603 0,0541 30000352 CAP EL 100UF 16V M C779 C786 0,0300 C306 C700 C363 C364 C365 C759 C274 C520 30000353 CAP EL 100UF 25V M C107 0,0300 30000354 CAP EL 100UF 35V M C110 0,0400 30000355...
  • Page 35 30000411 CAP EL 4700UF 16V M C164 0,3000 30000413 CAP EL 4.7UF 50V M C539 0,0120 30000415 CAP EL 4.7UF 250V M C902 0,0600 30000426 CAP EL 6.8UF 50V M (BPL) 0,1200 30000428 SPARK GAP 300V SG900 SG901 SG902 SG903 SG904 0,1634 30000433 CAP CER 1NF 1KV M B C901...
  • Page 36 30000513 RES CF 1/4W 130K J R128 0,0120 30000525 RES CF 1/2W 1.5K J R909 R913 R910 0,0120 30000531 RES CF 1/4W 15K J R369 0,0120 R516 30000535 RES CF 1/2W 150K J R906 0,0114 30000536 RES CF 1/4W 150K J R142 0,0120 30000541...
  • Page 37 30000788 RES CF 1/4W 6.8M J R900 0,0114 30000792 RES CF 1/4W 75R J R236 0,0120 R229 30000848 RES MF 1/4W 1K F R615 0,0120 30000865 RES MF 1/4W 1.2K J R659 0,0000 30000913 RES MF 1/4W 2K J R109 0,0100 30000982 RES MF 1/4W 4.7K J...
  • Page 38 D131 D209 D905 D906 D907 D908 . D001 D002 D003 D004 . D106 D139 30001291 DIODE HER107 1A/800V 30A D613 D111 0,0312 30001299 DIODE UF5404 3A/400V 150A D603 D604 0,0672 30001315 DIODE BYD33D 1A/200V 20A D117 0,1100 D127 D133 30001318 DIODE BA159 1A/800V 20A D902 0,0300...
  • Page 39 30001518 IC TDA1308 IC704 0,7200 30001619 IC TEA6415C IC201 2,3500 30001622 IC 7805 (1A) IC102 0,1900 30001668 IC LM317T IC101 0,2500 30001670 PREAMPLIFIER TFMS5360 MD101 . 0,5000 30001732 FUSE 3.15A 250V 5*20 0,0500 30001737 XTAL 12MHZ X200 1,1500 30001756 XTAL 18.432MHZ X700 0,7300 30001762...
  • Page 40 30001891 RCA JACK 1P WHITE 28 FAV CON10 . 0,2300 30001892 RCA JACK 1P RED 28 FAV CON10 . 0,2500 RCA JACK 1P YELLOW 28 30001893 CON10 . 0,2300 JACK 4P DIN TYPE FOR 30001895 CON10 . 0,4000 SVHS JACK HEADPHONE STEREO 30001902 CON10 .
  • Page 41 CONN.ASSY.3/60 FC (PRE- 30002335 CON10 . 0,0931 AMP) CONN.ASSY.2/76 R2.6 30002347 0,1138 W/GRAY CONN. CABLE AC 2P 65CM W/MLX 30002368 0,1447 CONN. 30002733 LED INFRARED IR333 D100 0,1331 30002734 TR BC548C Q101 0,0800 30002735 IC SAA3010T IC101 0,3008 30006662 XTAL 6MHZ X500 0,3100 30006709...
  • Page 42 30008721 IC TDA6108 0,9251 30008915 28" CPT TUBE 16:9 SF IRON 154,0500 USD 30009085 CABLE 1P R2.6 35 W/CLIPS CAB1 . 0,0343 CAP CER 470PF 1KV K 30009208 C863 0,0327 (PULSE) C645 30009366 DIODE UF5402 3A/200V 150A D118 0,1500 D119 TUNER WSP (PLL) 38.9 MK2 - 30009637 TU200 .
  • Page 43 AV+SVHS W/FERRITE 30014175 TRF FBT 110° AK33 16:9 SLOT TR601 . 6,0223 30014261 FILTER SAW K3958M Z201 0,7080 30014359 IC MSP3400G SDIP64 IC700 3,7922 30014610 PIN F 24P/2.5MM 0,0986 30014717 IC 24C16 3.3V 0,2284 CONN ASSY 5/50 AWG24 30015050 PL902 . 0,4937 NELTRON 30015087...
  • Page 44 BACK DOOR AK33 W/JACK 20067973 0,2640 BOARD HOLE (I) 20067975 JACK BOARD 11AK33 (I) 0,2128 CHASSIS FRAME AK33(FR- 20069012 0,5069 HIPS.V0)(I)AK33/28 SIDE DOOR BRACK.7289/99 20071444 0,00 (UL) SILVER(P) SIDE DOOR BRACK.7289/99 20071445 0,00 (UL) EKO.GRAY(I) BACK C.7289/99- 20095741 0,00 2850/51W(UL)SILVER(P)AK18 BACK C.7289/99- 20095802 0,00...
  • Page 45 R/C 2040 NOBRAND 20079973 1,8678 (SILVER/P) (F) LBL.BCK.CVR.TEAC 20105821 0,00 CTW2850S/1 (AK33) R/C 2040 TEAC RC-827(S) 20106956 0,00 (SILVER/P) LOGO TEAC (BIG)(GRAY 40001939 0,3200 W/P) CARTON BOX 7289/99 16:9 50006060 0,00 CR&W/TV EMPTY 50011720 LABEL HIGH END 0,1621 LBL.SCREEN TEAC...

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