Page 1
In the interests of user safety (required by safety regulations in some countries) the set should be re- stored to its original condition and only parts identi- cal to those specified should be used. In order to service the model C-2890EES, refer to AK-45 Chassis Service Manual (SE00AK45CHA00).
Page 2
C-2890EES SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
Page 3
C-2890EES ELECTRICAL SPECIFICATIONS •Picture Intermediate frequency •Power Input ....220V-240 Volts AC 50 Hz L’ ..........33.9MHz L, B/G, D/K,I ......38.9MHz •Power Consumption •Sound Carrier Trap Normal Operation (Method IEC60107) ....70 W L’ ..........40.4MHz Stand-by Operation .......... < 4 W L, D/K .........
Page 4
C-2890EES IMPORTANT SERVICING NOTES Only qualified service personnel are allowed to carry out maintenance and repair of this receiver. Servicing of High Voltage System and CRT It is important that the static charge is removed from the high voltage system when carrying out work on the receiver.
Page 5
C-2890EES CONTROLS & TERMINALS FRONT PANEL PX@S ÃWPGà à 8uà H@IV REAR PANEL (;7 (;7 Speakers (left + right) ANT = Antenna (75 W) POWER = Power On / Off EXT.1 = Scart Socket 1 (with RGB) - VOL + = Volume -/+ EXT.2 = Scart Socket 2 (with SVHS)
Page 6
C-2890EES REMOTE CONTROL = Stand By = Cursor Up = Cursor Right OK = OK Info (Program Menu) 0 - 9 = Direct Program -/-- = Double Digit Wide mode button P/CH+ = Program + + = Volume + = TV / Quit Menu...
Page 7
C-2890EES CHASSIS LAYOUT Mother Unit CRT Unit Control Panel Unit...
Page 8
30001619 IC VIDEO SWITCH TEA6415C DIP20 IC206 30021083 IC TDA9886T/V3-SO24 DIODES IC301 30016113 IC AAMP TDA7269A 2*14W MULTIWATT11 30001279 LED RED/GREEN LTL293SJ IC500 20152368 PR.IC.45-SHARP 1.2.77-L.1 D100 30001329 DIODE 1N4007 1A/1000V 30A IC502 20140957 IC 24C16 V042L3324A00040100112 D100 30002733 LED INFRARED IR333 IC600...
Page 9
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE D133 30003722 DIODE ZENER ZPD15V L101 30018866 LINE FILTER SAFE 2X22MH 10mmX12.5mm D134 30001285 DIODE 1N4148 SMD L102 30001971 FERRITE BEAT (805) BLM21A601S...
Page 10
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE C103 30000094 CAP MKT SAFE 220NF 275V M AC C210 30016126 CAP SMD 220NF 16V K R (0603) C103 30016654 CAP SMD 100NF 16V K R (0603)
Page 11
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE C296 30012589 CAP SMD 4.7NF 50V K (0603) C621 30023480 CAP MKP 10NF 2KV %3.5 C300 30012589 CAP SMD 4.7NF 50V K (0603)
Page 12
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE C774 30012567 CAP SMD 220PF 50V J (0603) R137 30000481 RES CF 1/4W 1M J C781 30012590 CAP SMD 47NF 50V K (0603) R138 30000660 RES CF 1/4W 3.3K J...
Page 13
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE R241 30012510 RES SMD 1/16W 100R J (0603) R404 30012692 RES SMD 1/16W 4.7K J (0603) R242 30012696 RES SMD 1/16W 47K J (0603)
Page 14
C-2890EES REF No. PARTS DESCRIPTION SN CODE EX CODE REF No. PARTS DESCRIPTION SN CODE EX CODE R561 30012510 RES SMD 1/16W 100R J (0603) R658 30000466 RES CF 1/4W 1K J R564 30012692 RES SMD 1/16W 4.7K J (0603)
Page 16
Technical information and Production: Vestel Electronik AS PRINTED BY: Think Ecology, please use Technical information re-issued: SHARP ELECTRONICA ESPAÑA S.A. Service Manual Group Engineering Dept. Polígono Industrial Can Sant Joan 08190 Sant Cugat del Vallès Barcelona...
INTEGRATED CIRCUIT DESCRIPTIONS ............... 10 SERVICE MODE ADJUSTMENTS ..................23 BLOCK DIAGRAM ........................ 61 CIRCUIT DIAGRAMS ..................... 62 HOW TO UPDATE THE TECHNICAL INFORMATION ............73 SHARP CORPORATION This document has been published to be used for after sales service only.
Page 18
AK - 45 CHASSIS SERVICE MANUAL UPDATE LOG SHEET Technical Report No. Application Cause / Solution Part No. Page No. Data /Serial No. Technical Bulletin No. Use this page to keep any special servicing information as Technical Report (Bulletin), Technical Information, etc. If only part number changes are required, just change part number directly the part number in the Parts Listing Section.
AK - 45 CHASSIS TABLE OF CONTENTS 1.INTRODUCTION ..........................6 2.TUNER ..............................6 3.IF PART (TDA9885/86) ........................6 4.VIDEO SWITCH TEA6415 ......................7 5.MULTI STANDARD SOUND PROCESSOR ................7 6.SOUND OUTPUT STAGE WITH TDA7269A .................7 7.VERTICAL OUTPUT STAGE WITH STV9379FA ..............7 8.VIDEO OUTPUT AMPLIFIER TDA6108 ...................7 9.POWER SUPPLY (SMPS) ......................8...
Page 20
AK - 45 CHASSIS 13.10.SDA5555 ..........................18 13.10.1.General definition ......................18 13.10.2.Features..........................18 13.11.MC44608 ..........................19 13.11.1.Description.........................19 13.11.2.General Features .......................20 13.11.3.Pin Connections ........................20 13.12.TCET1102G .........................21 13.12.1.Description.........................21 13.12.2.Applications ........................21 13.12.3.Features..........................21 13.13.TDA9885T ..........................21 13.13.1.General Description ......................21 13.13.2.Features..........................21 13.13.3.Pinning..........................22 13.14.PI5V330 ..........................22 13.14.1.General Description ......................22 14.AK45 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS ......23 14.1.SERVICE MENU ..........................23 14.2.ADJUST MENU ...........................23...
Page 21
AK - 45 CHASSIS Option 39. Personal Preference Equalizer Band 1 ..............44 Option 40. Personal Preference Equalizer Band 2 ..............44 Option 41. Personal Preference Equalizer Band 3 ..............44 Option 42. Personal Preference Equalizer Band 4 ..............44 Option 43. Personal Preference Equalizer Band 5 ..............44 Option 44.
AK - 45 CHASSIS 1.INTRODUCTION 11AK45 is a 50Hz colour television capable of driving 24” + CRT sizes (beginning from 24” 16:9 up to 33”). 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´.
AK - 45 CHASSIS 9.POWER SUPPLY (SMPS) The DC voltages required at various parts of the chassis are provided by an SMPS transformer controlled by the IC MC44608, which is designed for driving, controlling and protecting switching transistor of SMPS. The transformer generates 145V for Horizontal output stage, +/-14V for audio amplifier, 5V and 3.3V stand by voltage and 8V, 12V and 5V supplies for other different parts of the chassis.
AK - 45 CHASSIS • Up to 16 Colours per DRCS Character • One out of Eight Colours for Foreground and Background Colours for 1-bit DRCS and ROM Characters • Shadowing • Contrast Reduction • Pixel by Pixel Shiftable Cursor With up to 4 Different Colours •...
AK - 45 CHASSIS K9356M: Standard B/G, D/K, I, L Features TV IF audio filter with pass band for sound carriers at 32,40 MHz (D/K, L), 32,90 MHz (I) and 33,40 MHz (B/G) K3953M Terminal and Pin configuration are the same with K9656M: Standard B/G, D/K, I, L/L’...
AK - 45 CHASSIS • Low power consumption • Short-circuit resistant • High performance • high signal-to-noise ratio • High slew rate • Low distortion • Large output voltage swing. 13.2.3.Pinning SYMBOL DESCRIPTION OUTA Output A INA(neg) Inverting input A INA(pos) Non-inverting input A Negative supply...
AK - 45 CHASSIS 13.3.2.Features Standard Selection with single I C transmission Automatic Standard Detection of terrestrial TV standards Automatic Sound Selection (mono/stereo/bilingual), new registers MODUS, STATUS Two selectable sound IF (SIF) inputs Automatic Carrier Mute function Interrupt output programmable (indicating status change) Loudspeaker / Headphone channel with volume, balance, bass, treble, loudness AVC: Automatic Volume Correction Subwoofer output with programmable low-pass and complementary high-pass filter...
AK - 45 CHASSIS Not connected Not connected AVSS Analog ground AVSS Analog ground MONO_IN Mono input Not connected Reference voltage IF A/D VREFTOP converter SC1_IN_R SCART 1 input, right SC1_IN_L SCART 1 input, left ASG1 AHVSS Analog Shield Ground 1 SC2_IN_R SCART 2 input, right SC2_IN_L...
AK - 45 CHASSIS 13.4.2.Features Video Decoding and Processing – four CVBS, one S-VHS input, one YC component input – integrated high-quality A/D converters and associated clamp and AGC circuits – adaptive 2H comb filter Y/C separator – multistandard colour decoder PAL/NTSC/SECAM including all substandards –...
AK - 45 CHASSIS 13.7.TDA7269A 13.7.1.Description The TDA7269A is class AB dual Audio power amplifier assembled in the Multiwatt package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. 13.7.2.Features Wide Supply Voltage Range Up To ±20V Split Supply High Output Power 14 + 14W @THD =10%, R...
AK - 45 CHASSIS Memory • 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) •...
AK - 45 CHASSIS external components while offering a high flexibility and reliability. The device also features a very high efficiency stand–by management consisting of an effective Pulsed Mode operation. This technique enables the reduction of the stand–by power consumption to approximately 1W while delivering 300mW in a 150W SMPS.
AK - 45 CHASSIS 13.12.TCET1102G 13.12.1.Description The TCET110/ TCET2100/ TCET4100 consists of a phototransistor optically coupled to a gallium arsenide infrared-emitting diode in a 4-lead up to 16-lead plastic dual inline package. The elements are mounted on one lead frame using a coplanar technique, providing a fixed distance between input and output for highest safety requirements.
AK - 45 CHASSIS SIF AGC for gain controlled SIF amplifier; single reference QSS mixer able to operate in high performance single reference QSS mode and in intercarrier mode, switchable via I C-bus AM demodulator without extra reference circuit Alignment-free selective FM-PLL demodulator with high linearity and low noise C-bus control for all functions C-bus transceiver with pin programmable Module Address (MAD).
AK - 45 CHASSIS 14.AK45 CHASSIS PRODUCTION SERVICE MODE ADJUSTMENTS 14.1.SERVICE MENU All system, geometry and white balance alignments are performed in production service mode. Before starting the production mode alignments, make sure that all manual adjustments are done correctly. To start production mode alignments enter the MAIN MENU and then press the digits 4, 7, 2 and 5 respectively or press MUTE and INFO buttons at the same time.
Page 40
AK - 45 CHASSIS Y-Delay SECAM Enter a SECAM B/G colour and black-white bar test pattern via RF. Adjust Y-Delay SECAM till the colour transients on the colour bar of the pattern become as sharper and colours between transients do not mix with each other as possible.
Page 41
AK - 45 CHASSIS The amplitude of R of RGB output can be adjusted with the drive parameter WDR. The amplitude of G of RGB output can be adjusted with the drive parameter WDG. The amplitude of B of RGB output can be adjusted with the drive parameter WDB. The DC offset values of R of RGB output can be adjusted with the cutoff parameter CR.
Page 42
AK - 45 CHASSIS PANORAMIC VERT_POS (Panoramic mode Vertical Position) It’s used to adjust the vertical position of panoramic mode. PANORAMIC VERT_AMPL (Panoramic mode Vertical Amplitude) It’s used to adjust the vertical amplitude of panoramic mode. PANORAMIC VERT_SCOR (Panoramic mode Vertical S-Correction) It’s used to adjust the vertical s-correction of panoramic mode.
Page 43
AK - 45 CHASSIS 16:9 ZOOM VERT_POS (16:9 Zoom mode Vertical Position) It’s used to adjust the vertical position of 16:9 zoom mode. 16:9 ZOOM VERT_AMPL (16:9 Zoom mode Vertical Amplitude) It’s used to adjust the vertical amplitude of 16:9 zoom mode. 16:9 ZOOM VERT_SCOR (16:9 Zoom mode Vertical S-Correction) It’s used to adjust the vertical s-correction of 16:9 zoom mode.
Page 44
AK - 45 CHASSIS OSD Position It’s used to adjust the horizontal position of the OSD. BCLTHR Beam current threshold BCLG Beam current loop gain ROTATION (TILT) This adjustment only works when the TV has rotation option. Change TILT by pressing Left/Right buttons to rotate the complete raster clock-wise and counter clock-wise depending on the CRT.
Page 45
AK - 45 CHASSIS POFS2 (RGB HORIZONTAL SHIFT) It’s used to adjust the horizontal position of RGB signal. REFERENCE WDR RED COOL The amplitude of R of RGB output can be adjusted with the drive parameter WDR for the colour temp of cool mode.
Page 46
AK - 45 CHASSIS FULL HORZ_POS It’s used to adjust the horizontal position of 16:9 mode (full mode). FULL HORZ_AMPL It’s used to adjust the horizontal amplitude of 16:9 mode (full mode). BRIGHT MODE BRIGHTNESS It’s used to adjust the brightness value of bright mode. BRIGHT MODE COLOUR It’s used to adjust the colour value of bright mode.
Page 47
AK - 45 CHASSIS 14:9 RGB CUSHION It’s used to adjust the cushion in 14:9 mode for RGB signals. PANORAMIC RGB HORIZONTAL AMPLITUDE It’s used to adjust the horizontal amplitude in panoramic mode for RGB signals. 16:9 RGB HORIZONTAL AMPLITUDE It’s used to adjust the horizontal amplitude in 16:9 mode for RGB signals.
Page 48
AK - 45 CHASSIS SHARP 11AK45 TVs ADJUST VALUES SETTING VALUES ADJUST THOMSON THOMSON THOMSON EXPLANATION 28'' 16:9 SF TV 28" 4:3 SF 32" 16:9 SF W66EJU023X215 A66EHJ13X01 W7EGV023X215 ADJUST 0 Not used ADJUST 1 Not used ADJUST 2 Not used...
Page 49
AK - 45 CHASSIS SHARP 11AK45 TVs ADJUST VALUES SETTING VALUES ADJUST THOMSON THOMSON THOMSON EXPLANATION 28'' 16:9 SF TV 28" 4:3 SF 32" 16:9 SF W66EJU023X215 A66EHJ13X01 W7EGV023X215 ADJUST 59 ZOOM 14:9 HORZ_AMPL ADJUST 60 CINEMA VERT_POS ADJUST 61...
Page 50
No use ADJUST 157 P P BRIGHTNESS ADJUST 158 P P CONTRAST X: WILL BE ADJUSTED AUTOMATICALLY ACCORDING TO THE SHARP SPECIFICATION. COLOR TEMPERATURE SHOULD BE (SHARP SPECIFICATION); WESTERN EUROPE EASTERN EUROPE FOR NORMAL (x, y) (290, 300) (304, 306)
AK - 45 CHASSIS 14.3.OPTIONS MENU Select the parameter by pressing up/down buttons. Adjust the parameter by pressing Left/Right buttons. . In OPTIONS menu, some of the changed parameters are not stored automatically. To store the adjusted parameters, you should turn off and on TV. OPTIONS...
AK - 45 CHASSIS B4: x B3: x B2: x B1: LUMA 1 Luma Soft Limiter Enabled B0: BB 1 Blue Background Option Option 3. (0x19) Video Processor Cathode Drive Level B7: x B6: x B5: x B4: x B3: x B2: x B1: x B0: country =...
AK - 45 CHASSIS Note 1: :Frequency Mode Frequency Menu Item available Frequency Menu Item not available Option 8. IF Frequency B7: x B6: x B5: IfI note 3 B4: IfD note 4 B3: IfM note 5 B2: Aps note 6 B1: Hp note 7 B0: Hue...
AK - 45 CHASSIS Note 3: RGB Menu Item active/inactive RGB Menu Item inactive RGB Menu Item active Note 4: Equalizer available Equalizer not available Equalizer available Note 5: List Mode available List Mode not available List Mode available Note 6: Country Line available / Aps available or not Country Line not available / Aps not available Country Line available / Aps available...
AK - 45 CHASSIS Option 55. Speaker Setup b7 b6 b5 b4 b3 b2 b1 b0 Speaker Setup (L/R, L/C/R, L/R/S, L/C/R/S) 0 0 0 0 0 0 0 0 Option 56. Audio Options Available Or Not Attention: All bits on the Option 56 must be the “0” for MONO TV SETS B7: Nicam note 7 B6: ASD...
AK - 45 CHASSIS 14.4.OPTION TABLE RECOMMENDED VALUES X listed in the option can be 0 or 1 28" 4:3 MULTI 28" 16:9 MULTI 28" 16:9 PAL I OPTION X2 XXXXXX10 X2 XXXXXX10 X2 XXXXXX10 XX XXXXXXXX XX XXXXXXXX XX XXXXXXXX 23 001XXX11 23 001XXX11 23 001XXX11...
AK - 45 CHASSIS 14.5.SCREEN ADJUSTMENT (FBT SCREEN) SCREEN ADJUST From the option list change option 2 bit 6 from 0 to 1 for disabling vertical scan. Adjust horizontal line via screen adjust pot. as thin as possible. Then press 0 to leave service menu.
AK - 45 CHASSIS 17. HOW TO UPDATE THE TECHNICAL INFORMATION 17.1 How to update the Technical Information appeared on this Service Manual (and relatives) 17.1.1. Web site: https://www.vestelservice.com 17.1.2.Select: Technical Support 17.1.3. Login: 101278 17.1.4. Password: SHPII278 By this access you can consult the latest schematic diagram or request the Parts Listing of a concrete Produc- tion Date / Serial Number.
AK - 45 CHASSIS 17.4 Code Bar Label Information From the beginning of September.2002, Product Code the production month and year will be indicated inside the box as shown. Year Month Year Consecutive number Consecutive number Year Batch number It is the code that indicates Vestel internal identification Product code: number of the complete TV set.
Page 92
Technical information and Production: Vestel Electronik AS PRINTED BY: Think Ecology, please use Technical information re-issued: SHARP ELECTRONICA ESPAÑA S.A. Service Manual Group Engineering Dept. Polígono Industrial Can Sant Joan 08190 Sant Cugat del Vallès Barcelona...
Need help?
Do you have a question about the C-2890EES and is the answer not in the manual?
Questions and answers