Teac CTW3250S-1 Service Manual
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Teac CTW3250S-1 Service Manual

Teac CTW3250S-1 Service Manual

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SERVICE MANUAL
CTW3250S-1
76CM WS CTV
CHASSIS : 11AK33
SEP02
CTW3250S-1

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Summary of Contents for Teac CTW3250S-1

  • Page 1 SERVICE MANUAL CTW3250S-1 76CM WS CTV CHASSIS : 11AK33 SEP02 CTW3250S-1...
  • 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 10015333 3250*TEAC TEAC CTW3250S(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 USD MD.ASY.TB8270/71-3 / 20021028 1,0011 USD 3250/51 5SW AK18 ON/OFF AS.110°(32- 20036465 1,2056 USD 33")(2.2/AU)(W/MAKARON...
  • Page 33 30000151 CAP MKP 3.3NF 2KV %3.5 C611 0,1600 USD 30000153 CAP MKP 330NF 400V J C105 0,1400 USD 30000154 CAP MKP 390NF 250V J C614 0,1900 USD 30000160 CAP MKP 47NF 250V J C612 0,0900 USD 30000161 CAP MKP 47NF 630V J C114 0,1400 USD 30000167...
  • Page 34 C759 C274 C520 C779 C786 30000353 CAP EL 100UF 25V M C107 0,0300 USD 30000354 CAP EL 100UF 35V M C110 0,0400 USD 30000355 CAP EL 100UF 50V M C217 0,0183 USD 30000359 CAP EL 1000UF 16V M C143 0,0500 USD 30000360 CAP EL 1000UF 25V M C144...
  • Page 35 30000428 SPARK GAP 300V SG900 SG901 SG902 SG903 SG904 0,1634 USD 30000433 CAP CER 1NF 1KV M B C901 0,0300 USD 30000436 CAP CER 10NF 1KV ZE C170 0,0282 USD 30000438 CAP CER 2.2NF 2KV C903 0,0700 USD C166 30000440 CAP CER 2.2NF 4KV M C119 0,0500 USD...
  • Page 36 30000541 RES CF 1/4W 1.5M J R112 0,0100 USD R432 30000554 RES CF 1/4W 180R J R294 R607 0,0129 USD 30000560 RES CF 1/4W 1.8K J R537 R538 0,0120 USD 30000580 RES CF 1/4W 22R J R915 0,0120 USD 30000583 RES CF 1/4W 220R J R300 R302...
  • Page 37 30000994 RES MF 1/4W 51K F R657 0,0129 USD 30001082 RES MO 1/2W 1K J R613 0,0120 USD 30001084 RES MO 1W 1K J R101 0,0100 USD R914 30001088 RES MO 1W 1R J R627 0,0100 USD 30001125 RES MO 2W 2.2K J R911 0,0900 USD 30001132...
  • Page 38 D117 30001318 DIODE BA159 1A/800V 20A D902 0,0300 USD D129 D610 D600 D622 D140 D141 NOT2 . R651 DIODE 1N4007 1A/1000V 30001329 D901 D903 D904 . 0,0120 USD D104 D135 D109 D703 . 30001344 DIODE ZENER 6.2V 1/2W D909 0,0200 USD 30001368 DIODE ZENER 3V D136...
  • Page 39 30001756 XTAL 18.432MHZ X700 0,7300 USD CONN.MALE 2P (2052) 30001762 PL702 . 0,0400 USD GRAY 30001764 CONN.MALE (2052) BLACK PL701 . 0,0500 USD CONN.MALE 3P (2003) 30001770 PL503 . 0,0500 USD GRAY 30001783 CONN.MALE 5P (2005) PL502 . 0,0500 USD 30001785 CONN.MALE 7P (2007) PL509 .
  • Page 40 30001946 SPEAKER 8R 15W 57*160 3,9400 USD 30001947 TWEETER 8R 15W CLOSED . 0,7000 USD 30001964 FERRITE BAR 5*8 0,0700 USD 30001979 FIXED COIL 1UH Q45 M-A L102 0,0300 USD L200 30001987 FIXED COIL 4.7UH Q70 K-A L507 0,0200 USD 30001992 FIXED COIL 10UH Q65 K-A L500...
  • Page 41 PL902 . 30006712 FERRITE BEAD 3.5X4.7X0.8 L219 L220 0,0120 USD J136 J308 J161 J156 L201 L202 J203 30006755 RES MO 2W 4.7R J R161 0,0116 USD 30006940 CAP CER 2.7NF 1KV K B C117 0,0210 USD 30007202 RES MF 1/4W 56K F R658 0,0100 USD CAP CER 220PF 1KV K...
  • Page 42 30010571 CAP EL 10UF 16V M C323 0,0100 USD C255 DOUBLE-DECK SCART 30010921 PL207 . 0,3993 USD SOCKET FERRITE BEAT(805) 30010964 L103 0,0279 USD BLM21A601RPT L713 L714 30011443 XTAL REZ 429KHZ (0.9MM) X100 0,0273 USD 30011968 IC MC44608 IC106 0,6566 USD 30011970 IC MC33260 PFC IC107...
  • Page 43 30015222 RES MO 1W 0.75R J 0,00 30015617 TRF PFC AK33 200UH L102 0,7139 USD FIXED COIL 1MH AK33 30016083 L601 0,3652 USD HIGH CURRENT TRF SMPS AK33 (170-270V) 30016154 TR101 . 1,4202 USD 170W JVC 30016421 CONN.ASSY.2/60 VRT PL601 . 0,0434 USD 30016483 CONN.ASSY.2/60 HRZ...
  • Page 44 20013018 0,0130 USD (WO/UL) R/C 2040 NOBRAND 20079973 1,8678 USD (SILVER/P) (F) LBL.BCK.CVR.TEAC 20105820 0,00 CTW3250S/1 (AK33) R/C 2040 TEAC RC-826 20106957 0,00 (SILVER/P) LOGO TEAC (BIG)(GRAY 40001939 0,3200 USD W/P) CARTON BOX 16:9 8270/71 50006805 0,00 CR&W/TV HAM EMPT...
  • Page 45 WARRANTY CARD TEAC 50025239 0,00 (ENG) (3) LBL.SERVICE TEAC (4) 50025305 0,00 (AUST) I/B TEAC CTW3250S 50029817 0,00 PLL/5533/2040/ENG CARTON BOX TEAC 50030217 0,00 CTW3250S (SILVER) (33)

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