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Cameron KS21TK305A Service Manual

Color television receiver
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SERVICE MANUAL
Color Television Receiver
Model: KS21TK305A
PDF 文件使用 "pdfFactory Pro" 试用版本创建
www.fineprint.com.cn

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  • Page 1 SERVICE MANUAL Color Television Receiver Model: KS21TK305A PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 2: Table Of Contents

    SERVICE MANUAL CONTENTS ……3 I. IMPORTANT SERVICE SAFETY INFORMATION… II. ALIGNMENT PROCEDURES PLEASE READ BEFORE ATTEMPTING SERVICE… …………… …… ……...5 III. TV SPECIFICATION…………… IV. TV ADJUSTMENT V. IC INFORMATION………………… ……………………… … ..12 1. PHILIPS UOCIII CHIP (N603) 2. SWITCH POWER IC (N901) 3.

  • Page 3: Important Service Safety Information

    SERVICE MANUAL IMPORTANT SERVICE SAFETY INFORMATION Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment. Exercise care when servicing this chassis with power applied.
  • Page 4 SERVICE MANUAL High Voltage System remove static charges from it by connecting a 10K Ohm resistor in series Wan insulated wire(such as test probe) between the picture tube dag and 2nd anode lead(Have AC line cord disconnected from AC supply). The picture tube use in this receiver employ integral implosion protection.

  • Page 5: Alignment Procedures Please Read Before Attempting

    SERVICE MANUAL ALIGNMENT PROCEDURES PLEASE READ BEFORE ATTEMPTING SERVICE 1. Use an Isolation Transformer when performing any service on this chassis. 2. Never disconnect any leads while receiver is in operation. 3. Disconnect all power before attempting an repairs. 4. Do not short any position of the circuit while the power is on. 5.
  • Page 6 SERVICE MANUAL PAL DK/BG/I SECAM DK/BG 2.3 Scanning Lines & Frequencies 525 lines/60Hz or 625 lines/50Hz 15.75KHz/15.625KHz 2.4 Color Sub-Carrier: 4.433MHz/3.579MHz 2.5 IF: Picture 38.9MHz Sound 5.5/6.5MHz 2.6 Power Consumption: 75W; 2.7 Power Supply: AC 110-240V 50Hz±10% 2.8 Audio Output Power (7%THD): 1.5W X 2; 2.9 Aerial Input Impedance: 75 Ω...

  • Page 7: Tv Adjustment

    SERVICE MANUAL Main Power Switch Remote Sensor Standby Indicator Menu Select TV/AV Select Program and Volume Up/Down 5. TV’s Terminals 75 Ω Aerial Terminal 3 AV Inputs 1 S-Video Input 1 Y/U/V Input 1 AV Output 6. Other Informations 6.1 Magnetic Field: Bv = 0.3~0.65Gs 6.2 Standard Colour Temperature: 9300K (X = 0.284, Y = 0.299) TV ADJUSTMENT Test Equipment...
  • Page 8 SERVICE MANUAL control at least 5 times immediately. 2. Press the MENU buttons to select the desired Factory menu pages or press 0-9 number buttons to enter the Factory menu pages directly and then press the PROG.+/- buttons to select the desired items.
  • Page 9 SERVICE MANUAL RF AGC adjustment 1. Receive a 60dBμV gray scale signal(PAL or SECAM). 2. Enter Factory menu and select AGC TAKE OVER, then adjust it until the picture noise is just disappeared. FOCUS adjustment 1. Receive five circles pattern, adjust the pattern to Normal mode. 2.
  • Page 10 SERVICE MANUAL HOR.SHIFT 50（60） Adjust it so that the left half is symmetrical with the right half (H. CEN correction). EW PARABOLA 50（60） Adjust it so that parallelogram will be transformed to rectangle or trapezium (Receive cross hatch signal)(Parallelogram correction). TRAPEZIUM 50（60）...
  • Page 11 SERVICE MANUAL BLOG-N BLOG-W BLOG-C WPR-N WPR-W WPR-C WPR-N WPG-W WPG-C WPR-N WPB-W WPB-C Other factory menu data TV Model Item Factory menu 2108 1402 21SL39 29F08 21F08 TXT-ON Teletext lang Factory Teletext E/W adjustment4 Track. Mode Sub Brightness Main YVolume1 Main YVolume2 Factory adjustment5...

  • Page 12: Ic Information

    SERVICE MANUAL adjustment11 Russia Frequency Italy Frequency Spain Frequency Turkey Frequency German Frequency Poland Frequency OP Dyn.skin tone OP TRUSUR OP Rotation Factory adjustment12 OP EQUAL OP AUDIO CONFIG OP BILING Blackstretch Factory Bluestretch adjustment13 HORIZOTAL OFFSET TIM-REM Factory TIM-SLP adjustment14 PWR-REST PWR-ONKEY...
  • Page 13 SERVICE MANUAL • Digital sound processing circuit • Digital video processing circuit The UOCIII series consists of the following 3 basic concepts: • Stereo versions. These versions contain the TV processor with a stereo audio selector, the TCG -Controller, the multi-standard stereo or BTSC decoder, the digital sound processing circuit and the digital video processing circuit.
  • Page 14 SERVICE MANUAL signal at the SVO/IFVOUT output. * Automatic Y/C signal detector * Integrated luminance delay line with adjustable delay time * Picture improvement features with peaking (with switchable centre frequency, depeaking, variable positive/negative peak ratio, variable pre-/overshoot ratio and video dependent coring), dynamic skin tone control, gamma control and blue- and black stretching.
  • Page 15 SERVICE MANUAL * Horizontal and vertical geometry processing with horizontal parallelogram and bow correction and horizontal and vertical zoom * Low-power start-up of the horizontal drive circuit 1.2.2 Sound Demodulation * Separate SIF (Sound IF) input for single reference QSS (Quasi Split Sound) demodulation. * AM demodulator without extra reference 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).
  • Page 16 SERVICE MANUAL * Auxiliary RAM page pointer * 16-bit Data pointer * Stand-by, Idle and Power Down modes * 24 general-purpose I/O pins * 14 bits PWM for Voltage Synthesis Tuning * 8-bit A/D converter with 4 multiplexed inputs * 5 PWM (6-bits) outputs for analogue control functions * I2C byte level bus interface.
  • Page 17 SERVICE MANUAL * Curtaining effect via software 1.3 Quick reference data PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 18 SERVICE MANUAL PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 19 SERVICE MANUAL 1.4 Block diagram Note: TDA12062block diagram 1.5 Pinning information PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 20 SERVICE MANUAL Note: TDA12062’s pinning PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 21 SERVICE MANUAL PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 22 SERVICE MANUAL PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 23 SERVICE MANUAL 1.6 Power & Reset Management There are three Power Saving modes, Stand-by, Idle and Power Down, incorporated into the -Controller die. When utilizing either mode, the 3.3V power to the device (VDDP & VDDA) should be maintained, the 1.8V power to digital core except 80c51 and pads will be switched-off internally to minimize the leakage current.
  • Page 24 SERVICE MANUAL sound decoder, RDS, ISP, acquisition, display, display RAM and digital video interface. The software reset is executed by initially setting the corresponding bit to ‘1’ followed by clearing the bit to ‘0’. The reset is launched after the falling edge of this process. It takes approximately 200 ms to complete the internal reset sequence.
  • Page 25 SERVICE MANUAL • WatchDog Timer • UART, SAD and PWMs To enter Idle mode the IDL bit in the PCON register must be set. The WatchDog timer must be disabled prior to entering Idle to prevent the device being reset. It is advice to use the RCP (Remote Control Pre-processor) during the Idle mode to reduce the false interrupt wake-up of 80c51 in order to achieve the low power saving mode.
  • Page 26 SERVICE MANUAL There are three methods of exiting power down: • The first method to wake up from Power-Down is to use one of these two external interrupts: EX0 and EX1. The interrupt EX2 cannot be used to wake up the system. Since the clock is stopped, these external interrupts needs to be set level sensitive before entering Power-Down.
  • Page 27 SERVICE MANUAL 1.8 Functional Description Video Processor 1.8.1 Vision IF amplifier The vision IF amplifier can demodulate signals with positive and negative modulation. The PLL demodulator is completely alignment-free. The VCO of the PLL circuit is internal and the frequency is fixed to the required value by using the clock frequency of the TCG m-Controller as a reference.
  • Page 28 SERVICE MANUAL signals before they are sent to a digital signal processor. These signals have to be supplied to the sound IF inputs. In this mode the IF reference frequency is fixed at 43.008 or 49.152 MHz. It is also possible to supply an external reference signal to demodulator.
  • Page 29 SERVICE MANUAL linear phase detector and a constant input signal amplitude are required. For this reason the intercarrier signal is internally supplied to the demodulator via a gain controlled amplifier and AGC circuit. To improve the selectivity an internal bandpass filter is connected in front of the PLL circuit. The nominal frequency of the demodulator is tuned to the required frequency (4.5/5.5/6.0/6.5 MHz) by means of a calibration circuit which uses the clock frequency of the TCG11 m-Controller as a reference.
  • Page 30 SERVICE MANUAL demodulator has to be set to one of the fixed frequencies (43.008 MHz or 49.152 MHz) by the IFA -IFE bits in subaddress 31H. The I.F. centre frequency depends on the I.F. downmix frequency and the FM demodulator settings. The bandwidth of the RIF filter should be between 200 and 300 KHz for proper channel selectivity.
  • Page 31 SERVICE MANUAL independent of the synchronisation and can be used to switch the time-constant of the horizontal PLL depending on the presence of a video signal (via the VID bit). In this way a very stable OSD can be realised. The result of the video ident circuit can be read from the output bit SID (subaddress 00).
  • Page 32 SERVICE MANUAL reference oscillator of the TCG m-Controller. To obtain a stable On-Screen-Display (OSD) under all conditions it is important that the first control loop is switched off or set to low gain when no signal is available at the input. The input signal condition is detected by the video identification circuit.
  • Page 33 SERVICE MANUAL • Vertical shift • Vertical zoom • Vertical scroll • Vertical linearity correction. When required the linearity setting for the upper and lower part of the screen can have a different setting. • Horizontal shift • EW width •...
  • Page 34 SERVICE MANUAL 1.8.9 Chroma, luminance and feature processing Some versions contain a 4H/2H (2D) adaptive PAL/NTSC comb filter. The comb filter is automatically activated when standard CVBS signals are received. A signal is considered as “standard signal” when a PAL or NTSC signal is identified and when the vertical divider is in the modes ‘standard narrow window’...
  • Page 35 SERVICE MANUAL • Blue-stretch. This circuit is intended to shift colour near ‘white’ with sufficient contrast values towards more blue to obtain a brighter impression of the picture. • Dynamic skin tone (flesh) control. This function is realised in the YUV domain by detecting the colours near to the skin tone.
  • Page 36 SERVICE MANUAL 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. The SECAM decoder contains an auto-calibrating PLL demodulator which has two references, viz: the divided reference frequency (obtained from the m-Controller) which is used to tune the PLL to the desired free-running frequency and the bandgap reference to obtain the correct absolute value of the output signal.
  • Page 37 SERVICE MANUAL In the new configuration the cut-off level of the picture tube is controlled with a continuous loop whereas the correction of the amplitude of the output signals is realised by means of a digital loop. As a consequence the current measurement can be controlled from the m-Processor. The value of the “high current”...
  • Page 38 SERVICE MANUAL certain window (WBC-bit) or below or above this window (HBC-bit). This indication can be read from the status byte 01 and can be used for automatic adjustment of the Vg2 voltage during the production of the TV receiver. During this test the vertical scan remains active so that the indication of the 2 bits can be made visible on the TV screen.
  • Page 39 SERVICE MANUAL The control concept for the audio processor is based on the following new features: • Pre-defined setups for the sound processing modes like Dolby® Pro Logic® and Virtual Dolby® Surround (422, 423) • Flexible configuration of audio outputs to the loudspeaker configuration with an additional output crossbar.
  • Page 40 SERVICE MANUAL 2.3 Functions of each terminal PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 41 SERVICE MANUAL 2.4 Example Application Circuit Pin Configuration PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 42 SERVICE MANUAL 2.6 Electrical characteristics in MOSFET PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 43: Vertical Deflection Booster (N401)

    SERVICE MANUAL 3. VERTICAL DEFLECTION BOOSTER (N401) 3.1 STV9302B (used in TV Model 1402/2108/21F08) 3.1.1 Main Features ■ Power Amplifier ■ Flyback Generator ■ Output Current up to 2.5 App ■ Thermal Protection ■ Stand –by Control 3.1.2 Description The STV9325 is a vertical deflection booster designed for TV and monitor applications. This device, supplied with up to 35 V, provides up to 2 .5 App output current to drive the vertical deflection yoke The internal flyback generator delivers flyback voltages up to 75 V.
  • Page 44 SERVICE MANUAL 3.1.4 Internal Block Diagram PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 45 SERVICE MANUAL 3.1.5 Absolute Maximum Ratings PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 46 SERVICE MANUAL 3.1.6 Electrical Characteristics PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 47 SERVICE MANUAL 3.1.7 DC-coupled Application When DC coupled , the display vertical position can be adjusted with input bias. On the other hand, 2 supply sources (VS and -VEE) are required. A Stand-by state will be reached by switching OFF the positive supply alone, In this state,where both inputs are the same voltage as pin 2 ro higher, the output will sink negligible current from the deviation coil.
  • Page 48 SERVICE MANUAL 3.1.7.1 Centering 3.1.7.2 Peak Current 3.1.7.3 Ripple Rejection When both ramp signal and bias are provided by the same driver IC, you can gain natural PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 49: Audio Power Amplifier (N202)

    SERVICE MANUAL rejection of any ripple caused by a voltage drop in the ground, if you manage to apply the same fraction of ripple voltage to both booster inputs. For that purpose, arrange an intermediate point in the bias resistor bridge, such that (R8 / R7) = (R3 / R2), and connect the bias filtering capacitor between the intermediate point and the local driver ground.
  • Page 50 SERVICE MANUAL The TDA2615 is a dual power amplifier in a 9-lead plastic single-in-line (SIL9MPF) medium power package. It has been especially designed for mains fed applications, such as stereo radio and stereo TV. 4.1.3 Quick Reference Data 4.1.4 Block Diagram PDF 文件使用...
  • Page 51 SERVICE MANUAL 4.1.5 Functional Description The TDA2615 is a hi-fi stereo amplifier designed for mains fed applications, such as stereo radio and stereo TV. The circuit is optimally designed for symmetrical power supplies, but is also well-suited to asymmetrical power supply systems. ...

  • Page 52: Eeprom 24C16 (N602)

    SERVICE MANUAL 4.1.7 Pinning 5. EEPROM 24C16 (N602) 5.1 Features • Write Protect Pin for Hardware Data Protection – Utilizes Different Array Protection Compared to the AT24C16A • Low-voltage and Standard-voltage Operation – 2.7 (VCC = 2.7V to 5.5V) PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 53 SERVICE MANUAL • Internally Organized 2048 x 8 (16K) • 2-wire Serial Interface • Schmitt Trigger, Filtered Inputs for Noise Suppression • Bi-directional Data Transfer Protocol • 400 kHz (2.7V) Clock Rate for AT24C16A • 16-byte Page Write Modes • Partial Page Writes are Allowed •...
  • Page 54 SERVICE MANUAL 5.4 Block Diagram 5.5 Pin Description SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and negative edge clock data out of each device. PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 55 SERVICE MANUAL SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be wire-ORed with any number of other open-drain or open collector devices. DEVICE/PAGE ADDRESSES (A2, A1, A0): The A2, A1 and A0 pins are device address inputs. The AT24C16A does not use the device address pins, which limits the number of devices on a single bus to one.
  • Page 56 SERVICE MANUAL Acknowledge: All addresses and data words are serially transmitted to and from the EEPROM in 8 bit words. The EEPROM sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle. Standby Mode: The AT24C16A features a low power standby mode which is enabled: (a) upon power-up and (b) after the receipt of the STOP bit and the completion of any internal operations.
  • Page 57 SERVICE MANUAL TV BLOCK DIAGRAM TUNERR TDA2615 Speaker 24C16 I²C FILT I²C +21V UOC III TDA12062H1/N1F00 R,G,B BOARD AV1/SVHS input AV2/YCbCr input +12V -12V AV output Vertical circuit STV9325A Horizontal circuit -12V +12V +8V POWER IC ~220 STR6753 +21V PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 58: Appendix 1: Schematic Circuit Diagram

    SERVICE MANUAL Appendix 1: Schematic Circuit Diagram 1. Main Board 35009395 2. CRT Board 35008607 PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 59: Appendix 2: Pcb Layout Diagram

    SERVICE MANUAL Appendix 2: PCB Layout Diagram 1. Main Board 35009395 PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 60 SERVICE MANUAL 2. CRT Board 35008607 PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 61 SERVICE MANUAL PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...

  • Page 62: Appendix 3: Exploded Views

    SERVICE MANUAL Appendix 3: Exploded Views PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
  • Page 63 SERVICE MANUAL PDF 文件使用 "pdfFactory Pro" 试用版本创建 www.fineprint.com.cn...
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  • Page 66 36033109 36031314 36031315 36033108 KS21TK305A ASSEMBLY...
  • Page 67 CAM350 PRO V 7.0 : Fri Jul 14 14:22:01 2006 - (Untitled) PDF 文件以 "PDF 制作工厂" 试用版创建 ÿ http://www.fineprint.com...
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