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TV2KR-2S
COLOR TELEVISION RECEIVER CHASSIS
SERVICE MANUAL
Table of content
1. SPECIFICATION ................................................................................................................. 2 2. X-RAY RADIATION PRECAUTION..................................................................................... 2 3. SAFETY PRECAUTION...................................................................................................... 2 4. PRODUCT SAFETY NOTICE ............................................................................................. 3 5. GENERAL ADJUSTMENT.................................................................................................. 3 5.1 AUTOMATIC DEGAUSSING .......................................................................................... 3 5.2 B+ ADJUSTMENT .......................................................................................................... 3 5.3 HIGH VOLTAGE CHECK ................................................................................................ 3 5.4 FOCUSING..................................................................................................................... 3 6. ADJUSTMENT AND SERVICING THE CHASSIS .............................................................. 3 6.1 SERVICE MODE ............................................................................................................ 3 7. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM.................................................. 6 7.1 TDA9352 ........................................................................................................................ 6
7.1.1 FEATURES.............................................................................................................................6 7.1.2 PINNING ................................................................................................................................8
7.2 STV9302A ...................................................................................................................... 9
7.2.1 FEATURES.............................................................................................................................9 7.2.2 PINNING ................................................................................................................................9
7.3 STV8216......................................................................................................................... 9
7.3.1 FEATURES.............................................................................................................................9 7.3.2 PINNING ..............................................................................................................................10
7.4 TDA7057A .................................................................................................................... 11
7.4.1 FEATURES........................................................................................................................... 11 7.4.2 PINNING .............................................................................................................................. 11
7.5 24C08W6...................................................................................................................... 11
7.5.1 FEATURES...........................................................................................................................12 7.5.2 PINNING ..............................................................................................................................12
7.6 CD4052 ........................................................................................................................ 12
7.6.1 PINNING ..............................................................................................................................12 7.6.2 TRUTH TABLE .....................................................................................................................13
7.7 UC3842 ........................................................................................................................ 13
7.7.1 PINNING ..............................................................................................................................13
8. TROUBLE SHOOTING DIAGRAMS................................................................................. 14 9. WAVE FORMS .................................................................................................................. 16 10. SCEMATIC DIAGRAMS.................................................................................................. 22 11. PCB DRAWINGS ............................................................................................................ 23
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1. SPECIFICATION
· SYSTEM · POWER INPUT · POWER CONSUMPTION · AERIAL IMPEDANCE · TUNER · RECEIVING CHANNELS
PAL/SECAM BG/DK/I/L/L' NICAM/A2 stereo AC 170-245(50/60Hz) 75W 75 OHM UNBALANCED FREQUENCY SYNTHESIZER TUNING VHF-L E2-S6 VHF-H S7-S41 UHF E21- E69
· PROGRAMME · PICTURE TUBE · SOUND OUTPUT · SPEAKER · AV
MAX. 100 PROGRAM MEMORIES 20", 21"; 90° 2 x 2.0W 3W 16OHM FULL SCART1, SCART2, AV JACKS
CAUTION: Before servicing the chassis, read the "Safely Precaution". "X -Ray radiation Precaution" and
"Product Safety Notice" in this manual.
2. X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To Avoid such hazards the high voltage must be specified limit. The normal value of the high voltage of this receiver is 24.5KV +/-2KV under 230V AC power source. The high voltage must not exceed 27KV. 2. Each time a receiver requires servicing the high voltage should be checked following the HIGH VOLTAGE CHECK procedure in this manual. It is recommended the reading of the high voltage be recorded as a part of the service record. It is important to use an accurate and reliable high voltage meter. 3. The primary source of X -RAY RADIATION in this TV receiver is the picture tube. For continued X-RAY RADIATION protection, the replacement tube must be exactly the same type tube as used in this TV receiver. 4. Some parts in this receiver have special safety-related characteristics for X-RAY RADIATION protection. For continued safety, parts replacement should be undertaken only after referring the PRODUCT SAFETY NOTICE below.
3. SAFETY PRECAUTION
WARNING: Service should not be attempted by anyone unfamiliar with the necessary Precautions on this receiver. The following are the necessary precautions to be observed before servicing this chassis. 1. Since the power supply circuit of this receiver is directly connected to the AC power line. An isolation transformer should be used during any dynamic service to avoid possible shock hazard. 2. Always discharge the picture tube anode to the CRT conductive coating before handling the picture tube. The picture tube is highly evacuated and if broken, glass fragments will be violently expelled. Use shatterproof goggles and keep picture tube away from the unprotected body while handling. 3. When replacing a chassis in the cabinet, always be certain that all the protective devices are put back in 2
place, such as: nonmetallic control; knobs, insulating covers, shields, isolation resistor-capacitor, network, etc. 4. When replacing parts or circuit boards, disconnect the power cord. 5. When replacing a high voltage resistor (metal oxide resistor) on circuit hoard, keep the resistor APP. 10mm(1/2 in.) away from circuit board. 6. Connection wires must be kept away from components with high voltage or high temperature. 7. If any fuse in this TV receiver is blown, replace it with the FUSE specified in the chassis parts list. 8. The receiver is designed to operate with 230V(50Hz) AC mains.
4. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety-related characteristics are often passed unnoticed by a visual inspection and the X-RAY RADIATON protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, X-RAY RADIATION or other hazards.
5. GENERAL ADJUSTMENT
5.1 AUTOMATIC DEGAUSSING
An automatic degaussing coil is attached around the picture tube, degaussing the tube properly in about one second after the set is switched on. If the receiver is moved or faced on a different direction, the power must be switched off at least 15 minutes in order that the automatic degaussing circuit operated properly. External degaussing is necessary if the automatic degassing proves ineffective after the set is moved.
5.2 B+ ADJUSTMENT CAUTION: To avoid X-ray hazards and result in a nominal display width, B+ voltage must be set in the
scale of 110.0V+/-5V. 1. Make sure the AC power supply is 230V, 50Hz. 2. Switch on the TV receiver, tune in an active channel. 3. Measure the voltage between C318 on Main P.C. Board by DC voltmeter. 4. Set contrast, brightness, color to maximum. 5. Adjust RP301 on Main P. C. Board for B+110.0V+/-5V voltage reading.
5.3 HIGH VOLTAGE CHECK CAUTION: There is no high voltage adjustment in this chassis, B+110V voltage directly relates to the high
voltage. The high voltage does not exceed 27KV under any conditions. 1. Connect an accurate high voltage meter to the second anode cap of the picture tube. 2. Turn on the receiver, set brightness and contrast to minimum (Zero beam current). 3. Make sure the high voltage does not exceed 27KV. 4. NO matter whether the luminance, contrast and chrominance controls are set to maximum or minimum, the high voltage must be kept under 27KV.
5.4 FOCUSING
Receive a TV test pattern signal; adjust controls for optimum picture. Adjust Focus Control for a welldefined, sharpest display in the center area of the screen.
6. ADJUSTMENT AND SERVICING THE CHASSIS
6.1 SERVICE MODE
To enter the service mode, short service mode points on PCB (X202, pins 1&2) or press from ST-BY mode STATUS>OK>MUTE>ST-BY on RC. TV will display service menu as following table 1 line by line. To select the parameter by using the `P+/P-' keys. To adjust the selected parameter by using the `V+/V-' keys. To quit the service mode, press the `TV' key on remote control when in the service mode.
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Table 1
SERVICE MODE (enter: to short service mode points or press from ST-BY mode STATUS>OK>MUTE>ST-BY)
Control bits HS VHS VA VAZ VS SC CL Y Vg2 Vg2BR BLOR BLOG R G B AGC BCF OSO ACL FSL BKS IF AGCs FFI AV2 SVID RGBP FRAV PF RPO TSM TSH TBL Horizontal Shift Vertical Shift
Function
Value 31* 30* 30* 1* 33* 22* VX
Notes
Vertical Amplitude Vertical expand (zoom) Vertical Slope S-Correction Cathode drive Level Y Delay Screen Voltage Alignment mode
15* 50 .. 95 Volt drive 8 OK Screen VR (on the FBT)
Brightness control setting in screen 32 voltage alignment mode Black level off-set R Black level off-set G White point R White point G White point B AGC Take Over Point Black Current loop Failure Over scan Switch-Off Automatic Colour Limiting Forced vertical slicing level Black Stretch IF frequency selection AGC time constant Fast filter IF-PLL AV2 input enabled SVID input enabled RGB indication Front AV Peaking center frequency Ratio Pre-/Overshoot Limit between VHF1/VHF3 Limit between VHF3/UHF Code for band VHF-1 32 32 32 32 32 35* TOP 0 1 1 0 1 0 0 0 1 0 1 1 2 2 155 443 01
4
For special conditions (descramblers with unstable black level) the vertical slicing level can be forced to 70% under all conditions by setting FSL = 1.
(IF) IF AGC speed
TBM TBH DELAY STEP HOTEL LOCAL BRT CONTR 16:9 SOC* PWL* LCT* SEL5V SCSTB PREFM PRENIC PREAUX DKDEV DKZWT3 DKZWT2 DKZWT1 DKNIC INIC BGZWT BGNIC MNZWT SVCROFF SVCRON SVCREOF SVCREON AGCsd
Code for band VHF-3 Code for band UHF Delay time for tuner 0-50 kHz, 1-62,5 kHz Hotel mode enabled 6/3buttons keyboard switch Brightness control in service mode Contrast control in service mode 16:9 mode enabled Soft Clipper
02 04 32 0 0 0 32* 32* 1 0 0 2
IC STV8216 supply 5/8V Thru Mode Sound Level Prescaling FM Sound Level Prescaling NICAM Sound Level Prescaling SCART Overmodulation in DK NICAM Sound standard DK ZWEITON3 Sound standard DK ZWEITON2 Sound standard DK ZWEITON1 Sound standard DK NICAM Sound standard I NICAM Sound standard BG ZWEITON Sound standard BG NICAM Sound standard MN ZWEITON
0 1 5 7 0 0 1 1 1 1 1 1 1 0 28 24 25 22
Automatic Gain Control for L
9 5 32 60 1 55
PRIEFM BG Sound Level Prescaling FM BG CETH SQTH SUpPrS VOLST Carrier Level Threshold FM Squelch Threshold Registers update:1-after program switch, 0- in every 15 sec. Volume level on STV8216 outputs
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7. IC DESCRIPTIONS AND INTERNAL BLOCK DIAGRAM
· · · · · · ·
TDA9352 STV9302 STV8216 TDA7057A 24C08W6 CD4052 UC3842
7.1 TDA9352
The various versions of the TDA935X/6X/8XPS/N2 series combine the functions of a TV signal processor together with a µ-Controller and US Closed Caption decoder. Most versions have a Teletext decoder on board. The Teletext decoder has an internal RAM memory for 1 or 10 page text. The ICs are intended to be used in economy television receivers with 90° and 110° picture tubes. The ICs have supply voltages of 8 V and 3.3 V and they are mounted in S-DIP envelope with 64 pins.
7.1.1 FEATURES
TV-signal processor · Multi-standard vision IF circuit with alignment-free PLL demodulator. · Internal (switchable) time-constant for the IF-AGC circuit. · A choice can be made between versions with mono intercarrier sound FM demodulator and versions with QSS IF amplifier. · The mono intercarrier sound versions have a selective FM-PLL demodulator which can be switched to the different FM sound frequencies (4.5/5.5/6.0/6.5 MHz). The quality of this system is such that the external band-pass filters can be omitted. · Source selection between `internal 'CVBS and external CVBS or Y/C signals. · Integrated chrominance trap circuit. · Integrated luminance delay line with adjustable delay time. · Picture improvement features with peaking (with variable center frequency and positive/negative overshoot ratio) and black stretching. · Integrated chroma band-pass filter with switchable center frequency. · Only one reference (12 MHz) crystal required for the µ-Controller, Teletext- and the colour decoder. · PAL/NTSC or multi-standard colour decoder with automatic search system. · Internal base-band delay line. · RGB control circuit with `Continuous Cathode Calibration', white point and black level offset adjustment so that the colour temperature of the dark and the light parts of the screen can be chosen independently. · Linear RGB or YUV input with fast blanking for external RGB/YUV sources. The Text/OSD signals are internally supplied from the µ-Controller/Teletext decoder. · Contrast reduction possibility during mixed-mode of OSD and Text signals. · Horizontal synchronization with two control loops and alignment-free horizontal oscillator. · Vertical count-down circuit. · Vertical driver optimized for DC-coupled vertical output stages. · Horizontal and vertical geometry processing. · Horizontal and vertical zoom function for 16:9 applications. · Horizontal parallelogram and bow correction for large screen picture tubes. · Low-power start-up of the horizontal drive circuit. µ-Controller · 80C51-controller core standard instruction set and timing. · 1µs machine cycle. · 32 - 128Kx8-bit late programmed ROM. 6
· · · · · · · · · · ·
3 - 12Kx8-bit Auxiliary RAM (shared with Display and Acquisition). Interrupt controller for individual enable/disable with two level priority. Two 16-bit Timer/Counter registers. One 16 bit Timer with 8-bit Pre-scaler. Watch Dog timer. Auxiliary RAM page pointer. 16-bit Data pointer. Stand-by, Idle and Power Down (PD) mode. 14 bits PWM for Voltage Synthesis Tuning. 8-bit A/D converter. 4 pins which can be programmed as general I/O pin, ADC input or PWM (6-bit) output.
Data Capture · Text memory for 0, 1 or 10 pages. · In the 10 page versions inventory of transmitted Teletext pages stored in the Transmitted Page Table (TPT) and Subtitle Page Table (SPT). · Data Capture for US Closed Caption. · Data Capture for 525/625 lines WST, VPS (PDC system A) and Wide Screen Signaling (WSS) bit decoding. · Automatic selection between 525 WST/625 WST. · Automatic selection between 625 WST/VPS on line 16 of VBI. · Real-time capture and decoding for WST Teletext in Hardware, to enable optimized-processor throughput. · Automatic detection of FASTEXT transmission. · Real-time packet 26 engine in Hardware for processing accented, G2 and G3 characters. · Signal quality detector for video and WST/VPS data types. · Comprehensive teletext language coverage. · Full Field and Vertical Blanking Interval (VBI) data capture of WST data. Display · Teletext and Enhanced OSD modes. · Features of level 1.5 WST and US Close Caption. · Serial and Parallel Display Attributes. · Single/Double/Quadruple Width and Height for characters. · Scrolling of display region. · Variable flash rate controlled by software. · Enhanced display features including overlining, underlining and italics. · Soft colours using CLUT with 4096 colour palette. · Globally selectable scanlines per row (9/10/13/16) and character matrix [12x10, 12x13, 12x16 (VxH)]. · Fringing (Shadow) selectable from N-S-E-W direction. · Fringe colour selectable. · Meshing of defined area. · Contrast reduction of defined area. · Cursor. · Special Graphics Characters with two planes, allowing our colours per character. · 32 software redefinable On-Screen display characters. · 4 WST Character sets (G0/G2) in single device (e.g. Latin, Cyrillic, Greek, Arabic). · G1 Mosaic graphics, Limited G3 Line drawing characters. · WST Character sets and Closed Caption Character set in single device.
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7.1.2 PINNING
SYMBOL P1.3/T1 P1.6/SCL P1.7/SDA P2.0/TPWM P3.0/ADC0 P3.1/ADC1 P3.2/ADC2 P3.3/ADC3 VSSC/P P0.5 P0.6 VSSA SECPLL VP2 DECDIG PH2LF PH1LF GND3 DECBG AVL/EWD VDRB VDRA IFIN1 IFIN2 IREF VSC TUNERAGC AUDEEM/SIFIN1 DECSDEM/SIFIN2 GND2 SNDPLL/SIFAGC AVL/SNDIF/REF0/ AMOUT HOUT FBISO output AUDEXT/QSSO/AMOUT EHTO PLLIF IFVO/SVO VP1 CVBSINT GND1 CVBS/Y CHROMA AUDOUT/AMOUT INSSW2 R2/VIN G2/YIN B2/UIN BCLIN BLKIN RO GO PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 DESCRIPTION Port 1.3 or Counter/Timer 1 input Port 1.6 or I2C-bus clock line Port 1.7 or I2C-bus data line Port 2.0 or Tuning PWM output Port 3.0 or ADC0 input Port 3.1 or ADC1 input Port 3.2 or ADC2 input Port 3.3 or ADC3 input Digital ground for µ-Controller core and periphery Port 0.5 (8 mA current sinking capability for direct drive of LEDs) Port 0.6 (8 mA current sinking capability for direct drive of LEDs) Analog ground of Teletext decoder and digital ground of TV-processor SECAM PLL decoupling 2nd supply voltage TV-processor (+8V) Decoupling digital supply of TV-processor Phase-2 filter Phase-1 filter Ground 3 for TV-processor Bandgap decoupling Automatic Volume Levelling /East-West drive output Vertical drive B output Vertical drive A output IF input 1 IF input 2 Reference current input vertical sawtooth capacitor Tuner AGC output Audio deemphasis or SIF input 1 Decoupling sound demodulator or SIF input 2 Ground 2 for TV processor Narrow band PLL filter /AGC sound IF Automatic Volume Levelling/sound IF input/subcarrier reference output/AM output (non controlled) Horizontal output Flyback input/sandcastle External audio input/QSS intercarrier out/AM audio output (non controlled) EHT/overvoltage protection input IF-PLL loop filter IF video output/selected CVBS output Main supply voltageTV-processor (+8V) Internal CVBS input Ground 1 for TV-processor External CVBS/Y input Chrominance input (SVHS) Audio output/AM audio output (volume controlled) 2nd RGB/YUV insertion input 2nd R input / V (R-Y) input 2nd G input / Y input 2nd B input / U (B-Y) input Beam current limiter input / (V-guard input) Black current input / (V-guard input) Red output Green output 8
BO VDDA VPE VDDC OSCGND XTALIN XTALOUT RESET VDDP P1.0/INT1 P1.1/T0 P1.2/INT0
53 54 55 56 57 58 59 60 61 62 63 64
Blue output Analog supply of Teletext decoder and digital supply of TV-processor (3.3 V) OTP Programming Voltage Digital supply to core (3.3 V) Oscillator ground supply Crystal oscillator input Crystal oscillator output Reset Digital supply to periphery (+3.3 V) Port 1.0 or external interrupt 1 input Port 1.1 or Counter/Timer 0 input Port 1.2 or external interrupt 0 input
7.2 STV9302A
The STV9302A is a vertical deflection booster designed for TV and monitor applications. This device, supplied with up to 35V, provides up to 2App output current to drive the vertical deflection yoke. The internal flyback generator delivers flyback voltages up to 70V. In double-supply applications, a stand-by state will be reached by stopping the (+) supply alone.
7.2.1 FEATURES · · · · ·
Power Amplifier Flyback Generator Output Current up to 2App Thermal Protection Stand-by Control
7.2.2 PINNING
1. 2. 3. 4. 5. 6. 7. Input (Inverting) Supply Voltage Flyback Generator Ground Or Negative Supply Output Output Stage Supply Input (Non Inverting)
7.3 STV8216
The STV82x6 is composed of three main parts: 1. TV Sound Demodulator: provides all the necessary circuitry for the demodulation of audio transmissions of European and Asian terrestrial TV broadcasts. The various transmission standards are automatically detected and demodulated without user intervention. 2. Audio Processor: based on DSP technology, independently controls loudspeaker, subwoofer and headphone signals. It offers basic and advanced features, such as a ST WideSurround, Equalizer, Automatic Loudness and Smart Volume Control for television viewer comfort. The STV8226/36 versions can perform additionally the SRS 3D Surround for stereo and mono signals. 3. Audio Matrix: 3 stereo and 1 mono external analog audio inputs to loudspeakers and headphone, with 2 stereo external analog audio outputs (SCART compatible). 4.
7.3.1 FEATURES · NICAM, AM, FM Mono and FM 2 Carrier Stereo Demodulators for all sound carriers between 4.5 and 7 · · · · · ·
MHz Mono input provided for optimum AM Demodulation performances Demodulation controlled by Automatic Standard Recognition System Sound IF AGC with wide range Overmodulation and Carrier Offset recovery Smart Volume Control 5-band Equalizer & Bass/Treble Control 9
· · · · · · · · · · · ·
Automatic Loudness Control Loudspeaker and Headphone outputs with Volume/Balance Controls and Beeper Subwoofer output with Volume Control and Programmable Bandwidth Spatial Sound Effects (ST WideSurround and Pseudo-Stereo) SRS 3D Surround 3-to-2 Analog Stereo Audio I/Os (SCART compatible) with Audio Matrix Low-noise Audio Mutes and Switches I²S Output to interface with Dolby Pro Logic Decoder I²C Bus-controlled Single and standard 27 MHz Crystal Oscillator Power supplies: 3.3 V Digital, 5 V or 8 V Analog Embedded 3.3 V Regulators
7.3.2 PINNING
SYMBOL SIF VTOP VREFIF VDDIF GNDIF MONOIN AO1L AO1R VDDC GNDC AI1L AI1R VMC1 VMC2 AI2L AI2R VDDA GNDAH AO2L AO2R VDDH VREFA AI3L AI3R BGAP LSL LSR SW HPL HPR GNDSA HPD ADR SCL SDA REG RESET SYSCK MCK VDD1 GND1 GNDSP PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 DESCRIPTION Sound IF Input ADC VTOP Decoupling Pin AGC Voltage Reference Decoupling Pin 3.3 V Power Supply for IF AGC & ADC 0 V Power Supply for IF AGC & ADC Mono Input Left SCART1 Audio Output Right SCART1 Audio Output 3.3 V Power Supply for Audio DAC/ADC 0 V Power Supply for DAC/ADC Left SCART1 Audio Input Right SCART1 Audio Input Switched VREFDecoupling Pin for Audio Converters VREFDecoupling Pin for Audio Converters Left SCART2 Audio Input Right SCART2 Audio Input 3.3 V Power Supply for Audio Buffers, Matrix & Bias 0 V Power Supply for Audio Buffers & SCART Left SCART2 Audio Output Right SCART2 Audio Output 8 V / 5 V Power Supply for SCART & Audio Buffers Voltage Reference for Audio Buffers Left SCART3 Audio Input Right SCART3 Audio Input Bandgap Voltage Source Decoupling Left Loudspeaker Output Right Loudspeaker Output Subwoofer Output Left Headphone Output Right Headphone Output Substrate Analog/Digital Shield Headphone Detection Input (Active Low) Hardware I²C Chip Address Control I²C Serial Clock I²C Serial Data 5 V Power Regulator Control Hardware Reset (Active Low) System Clock Output I²S Master Clock Output 3.3V Power Supply for Digital Core & IO Cells 0V Power Supply for Digital Core & IO Cells Substrate Analog/Digital Shield for Clock-PLL 10
XTI XTO VDDP GNDP GND2 VDD2 CKTST SDO ST/SDI WS SCK BUS1 BUS0 IRQ
43 44 45 46 47 48 49 50 51 52 53 54 55 56
Crystal Oscillator Input Crystal Oscillator Output 3.3 V Power Supply for Analog PLL Clock 0 V Power Supply for Analog PLL Clock 0 V Power Supply for Digital Core, DSPs & IO Cells 3.3 V Power Supply for Digital Core, DSPs & IO Cells Must be Connected to 0 V I²S Bus Data Output Stereo Detection Output / I²S Bus Data Input I²S Bus Word Select Output I²S Bus Clock Output I²C Bus Expander Output 1 I²C Bus Expander Output 2 I²C Status Read Request
7.4 TDA7057A
The TDA7057A is a stereo BTL output amplifier with DC volume control. The device is designed for use in TVs and monitors, but is also suitable for battery-fed portable recorders and radios.
7.4.1 FEATURES · · · · · · · · · ·
DC volume control Few external components Mute mode Thermal Protection Short-circuit proof No switch-on and off clicks Good overall stability Low power consumption Low HF radiation ESD protected on all pins
7.4.2 PINNING
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. DC volume control1, VC1 Not connected, n.c. Voltage input, VI (1) Positive supply voltage, VP Voltage input2, VI (2) Signal ground, SGND DC volume control2, VC2 Positive output2, OUT2+ Power ground2, PGND2 Negative output2, OUT2Negative output1, OUT1Power ground1, PGND1 Positive output1, OUT1+
7.5 24C08W6
The M24C08W6 is a series of 2-wire, low power 8Kbit EEPROM with a wide operating range. It is organized as 1K-word X 8-bit. It is capable of page write and sequential read.
11
7.5.1 FEATURES · · · · · · · · · ·
Two Wire I2C Serial Interface Supports 400kHz Protocol. Single Supply Voltage: 2.5V to 5.5V. Write Control Input. BYTE and PAGE WRITE (up to 16 Bytes). RANDOM and SEQUENTIAL READ Modes. Self-Timed Programming Cycle. Automatic Address Incrementing. Enhanced ESD/Latch-Up Behavior. More than 1 Million Erase/Write Cycles. More than 40 Year Data Retention.
7.5.2 PINNING
1. 2. 3. 4. 5. 6. 7. 8. Connected to ground, A0 Connected to ground, A1 Connected to ground, A2 Connected to ground, A3 Serial data input/output, SDA Serial clock input, SCL Write protection Pin, WP Connected to VCC : Protection valid Connected to Ground: Protection invalid Power Supply, VCC
7.6 CD4052
The CD4052BC analog multiplexer/demultiplexer are digitally controlled analog switches having low "ON" impedance and very low "OFF" leakage currents. Control of analog signals up to 15Vp-p can be achieved by digital signal amplitudes of 3-15V. For example, if VDD = 5V, VSS = 0V and VEE = -5V, analog signals from -5V to +5V can be controlled by digital inputs of 0-5V. The multiplexer circuits dissipate extremely low qui escent power over the full VDD-VSS and VDD-VEE supply voltage ranges, independent of the logic state of the control signals. When a logical "1" is present at the inhibit input terminal all channels are "OFF". CD4052BC is a differential 4-channel multiplexer having two binary control inputs, A and B, and an inhibit input. The two binary input signals select 1 or 4 pairs of channels to be turned on and connect the differential analog inputs to the differential outputs.
7.6.1 PINNING
PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 SYMBOL 0y 2y y 3y 1y INH VEE VSS B A 3x 0x x 1x 2x VDD NAME AND FUNCTION Y channels IN/OUT Y channels IN/OUT Common Y OUT/IN Y channels IN/OUT Y channels IN/OUT Inhibit input Negative supply voltage Ground (0 V) Select input Select input X channels IN/OUT X channels IN/OUT Common X OUT/IN X channels IN/OUT X channels IN/OUT Positive supply voltage 12
7.6.2 TRUTH TABLE
INHIBIT 0 0 0 0 1 *Don't Care condition INPUT STATES B 0 0 1 1 * A 0 1 0 1 * "ON" CHANNELS 0X, 0Y 1X, 1Y 2X, 2Y 3X, 3Y NONE
7.7 UC3842
The UC3842 provides all the essential features necessary to the operation of the basic current mode controller.
7.7.1 PINNING
1. 2. 3. 4. 5. 6. 7. 8. Error amplifier output. Error amplifier inverting input. Current sense comparator. Timing network, RT CT. Device ground. Switching drive output. Device supply voltage input. Voltage reference, 5.0V.
13
8. TROUBLE SHOOTING DIAGRAMS
1.TV set doesn't operate, LED blank Replace fuse F301, check VT301, VD301-VD304, C301,C304, C310, C311, VD308, C325, R310, R307
NO
Replace damaged part
Check fuse F301 After replacing VT301, fuse is burning, VT301 damage OK Check +300v between pin1-2 C303 OK Check +12 on VD303 cathode; Check +110 on VD312 cathode; Check +15 on VD309 cathode; NO Check L301, R301, Replace damaged part Replace IC301, check R320, VD310, VD311, check R307, R310, C325,VD308 soldering
Check: R321, R315, R308 OK Check: VD303,VD309, VD312, C326,C317,C309 OK Check +110, +15, +12 circuit for short connection OK Check voltage NO +12,5 between pin 5-7 IC301 OK Check waveform WF305 on IC301 pin 4 OK Check waveform WF30,Check R317, R320, VT301 Check VD307, R304
Replace damaged part
NO
Replace damaged part
Replace damaged part
Replace damaged part
OK
Replace IC301, C315, R316
Replace damaged part
Check +5.1v on VD101
NO
Check: R117, VD101
Replace damaged part
OK
Check VD102 Replace damaged part 14
2.TV set doesn't switch ON from ST. BY mode, LED is in RED color Check +12v on VD303 cathode NO Go to diagram "TV set doesn't operate, LED blank"
OK Check +3,3v on IC303 pin 3 NO Check R309 Replace R309
OK
Replace IC 303
Check +3,3v on NO IC202 pin 61, 56, 54
Check: L201, L204, L205 Check: crystal resonator waveform WF201, Wf202 on IC202 pin 59,58
Replace damaged part
OK Press K103 (+) button on local keyboard or NO buttons on RC. At the same moment check +8v on IC302 pin2 Check IC202 pin1 NO voltage change from +0,9v (ST. BY mode) to +0,1 (OPERATE mode)
1) Replace XT201 2) Replace IC202
OK One by one disordering one of the pin of resistors:R230, R233, R250, R236, R234, R231, R229,R249, R221, R218. Check appropriate circuit. Replace part damaged
OK Check +8v on IC202 NO pin 14, 39
OK Check: L202, L206
Replace IC202
OK Replace L202, L206 Replace IC202 OK Check +8v circuit for short connection Replace part damaged Check:VT302 Replace VT302
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9. WAVE FORMS
WF201: IC202 pin 59: Quartz resonator frequency 12 kHz
WF202: IC202 pin 58: Quartz resonator frequency 12 kHz
WF203: IC202 pin 2: SCL pulses, 0,2 ms/ div
WF204: IC202 pin 3: SDA pulses, 0,2 ms/ div
WF205: IC202 pin 53: B signal to CRT board
WF206: IC202 pin 52: G signal to CRT board
16
WF207: IC202 pin 51: R signal to CRT board
WF208: IC202 pin 40: PAL video signal
WF209: IC202 pin 38: PAL video signal
WF210: IC202 pin 34: Sand castle pulse
WF211: IC202 pin 33: H-drive pulse
WF212: IC202 pin 35 (IC601 pin1): SIF signal, (BG mono)
17
WF213: IC202 pin 22: Vertical drive signal
WF214: IC202 pin 21: Vertical drive signal
WF213: IC202 pin 26: Vertical ramp generator signal
WF301: SMPS feed back pulse in TV OPERATE mode
WF302: SMPS feed back pulse in TV ST.BY mode
WF303:VT301 drain: main power pulse
18
WF304: IC301 pin 4, ramp generator pulse
WF305: IC301 pin 6, MOSFET drive pulse
WF306: VT301 gate: MOSFET drive pulse
WF307: VT301 source: MOSFET current pulse
WF401: IC401 pin7: V-drive pulse
WF402: IC402 pin1: V-drive pulse
19
WF403: IC402 pin3: V-blanking pulse
WF404: IC402 pin5: V-deflection pulse
WF501: VT502 collector: H-drive pulse
WF502: VT501 base: H-drive pulse
WF501: VT501 collector: H-feed back pulse
WF601: IC202 pin 35 (IC601 pin1): SIF signal (BG A2 stereo, NICAM stero)
20
WF602: IC601 pin 44:Quartz resonator frequency 27 kHz
WF603: IC601 pin 43:Quartz resonator frequency 27 kHz
WF604:
WF605:
21
TV2KR-2S-v3: PAL/SECAM/ NTSC/ BG/I/DK/LL' A2 STEREO/NICAM STEREO
SC2_Rin
C814
R/SVHS_C
R/SVHS_C
A_R_OUT
A_R_OUT
A_L_OUT
A_L_OUT
SCART 470p X801 GND
FRONT AV FB_GND A_R_IN A_GND G_GND V_GND V_GNG A_L_IN B_GND R_GND V_OUT S_SW V_IN X802 TJC3-2P-2A
SCART 1 FB_GND A_R_IN V_GNG V_GND G_GND A_GND A_L_IN R_GND B_GND V_OUT
SC2_Lin
VOLTAGE IN ST.BY and OPERATE MODE (GREEN)
L811 L808 27uH L814 10uH L812 L815 10uH CB6A L810 10uH C816 470p L809 10uH
SC1_Rin SC1_Lin SC1_Rout SC1_Lout
S_SW
V_IN
GND
GND
N.C.
N.C.
N.C.
N.C.
VOLTAGE IN OPERATE MODE ONLY (BROWN) VOLTAGE IN ST.BY MODE ONLY (BLUE) --WAVE FORMS
help help.Sch W W.Sch CRT CRT.Sch
FB
FB
G
G
B
B
CB6A
21
20
19
18
17
16
15
14
13
12
11
10a
11a
12a
13a
14a
15a
16a
17a
18a
19a
20a
21a
10
1a
2a
3a
4a
5a
6a
7a
8a
9a
9
8
7
6
5
4
3
2
1
2
10uH C815 470p GND
10uH L802 10uH
L817 10uH
47uH
CB6A
R801 75E
R802 75E
C802 100,0 1 2
+
R821 10k GND
v.csart
R804 470E
L801
L816
L803
L804
GND
R803 75 E C804 100,0
+
FBB R805 75 E C805 100p
R806 220E
R807 75 E
L805 CB6A R808 R809 220E 75E C807 47p GND
L806 L807 47 uH R811 10k R810 220E C811 R812 75E R813 2,7k
1 27uH
SCART 2
R819 220E 3 4 5 6 7 8 INH Vee C813 47p C801 10n IC801 CD4052 Vss Y0 Y2 Y Y3 Y1
C817 470p
GND
C806 47p GND GND
GND WF603
+5
Vcc
IC102 HS0038A2
GND
OUT
WF604
HPR HPL
WF605
1
2
3
VD101 5.1v
Vdd
C103
+
C105 22n GND
AV
C808 100n
C809 100n
C810 100n
C613
+
A
B
WF602
+
C610 22p
VT601 2SA1015
15
14
13
12
16
11
10
47,0 GND VD102 LED R117 1 2 R138 470E +8 GND 3 R139 47E R122 220E
KEY
R818 10k
R816 R815 R814 3,3k
CHROMA
P+
K101
118
P-
a2
a1
C619
C803 100n
+
1.5k
S.SW
C609 10,0 WF205
TV_video
2
C612 100nF C621 100nF 100nF 27mHz R613 100k 41 44 42 43
R614 100k C627
+
R607 100E R615 100E 34 36 35 33 32
R605 390E
VT602 BC848 R610 100E
3,3k L813 47uH
V.IN
R611 100E
2
G_in
R_in
K102
119
C812 10,0
220E
R123 100E
37 rst
WF206 48 47 40 56 52 53 51 50 39 46 49 45 55
A
B_in
FB
0,47 WF208 R202 L202 22 uH C206 100n C208
int.v.in1
+
31
+5 st.by
+12
IR
+5
SYSCK
GNDSA
BUS0
BUS1
VDD2
GND2
GND1
VDD1
REG
SDO
SDA
ADR
HPD
CKTST
GNDSP
RESET
XTO
SCK
MCK
GNDP
V.IN
EXT_V.IN
X201
CHROMA
G_in
B_in
100E b.out1 5
FB
VD202 9.1v
VDDIF
GNDIF
VDDA
AI1R
AI2R
AI3R
AI1L
AI2L
AI3L
C116
100n
LSR
LSL
+
BGAP
VTOP
AO1R
AO2R
AO1L
AO2L
2 3
C205
100n
R204 10k
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
C207
R208 100E
SC1_Rin
C245 100p
C128 22n R148 2,2k 2 R149 6,8k Z101 N9650E
230 SIF1 SIF2
R209
+8c
R620 560E
C218 47p
C624
100nF
C617 100nF
47,0
R206 100E
C217 47p
C214 100,0
C212 100n
201
C215
C633 56p
ex.v.in
int.v.in
1
3
VD107 1N4148
GND
+
b.out
r.out
i.cut
R219
228
132
N3953E 1 2 3 4 5
IR IF1 IF2
GND 60 61
227
R221 100E sda_1 SDA1 R228 100E C224 10n R224 100E GND 64 62 63
IR_
g.out
VT105 BC848
R151 2,2k C132 1n
12 mHz GND 55 56 54 57
C222
210 211
R220 360k R222 27k R223 100E WF211
+5
GND
ETH FLYB H.DR
59
58
48
42
40
38
47
39
35
49
43
36
34
46
45
53
52
51
50
44
41
TU101 IF1 IF2 +30V NC AFC/+5V +5V VHF1/SDA VHF3/SCL UHF TUN AGC 11 10 9 8 7 6 5 4 3 2 1
agc.tun 135
37
33
R618
C634 RCA_inL 1,0 + 47k
rca_inL1
+
RCA_inR
HPR+ HPL
C637+
rca_inR1
C639 100,0
+8 R624 22k R625 22k VD604 1N4148 C643 100nF
10,0
C645 100nF
C649 1,0
+
Z102
10kSCL1
GND
R218 100E
GND
390E
R215
202
+5b
WF210 1n
GND
+
R622
RCA_inR
scl_1
GND
100n GND
SIF
10,0
RCA_inL
22E
+5 st.by
R623 100E C642 VD603 L605 1N4148 10 uH 1,0
C629 10,0 C644
C646
134
R217 27k
R245 1k
C635
+
C640
C221
220nF
R216 10k
+
XT201
R214 180E
C216 100n
1
2
3
4
5
+
WF209
100E
L602 10 uH
C620 100nF
+3a
226
C618 100nF
GND
GND
TPS 6.0 GND
C623 10,0
+ +
C628 100nF
1k VD201 2.4v
204
205
330E
+
C622 10,0
+ +
+
L204 33 uH
C219 100n
R210 100E
220nF
VT204 2SA1015 R211
231
C615
229
R212
L205 33 uH
236
+5a
+
1,0
L201
33 uH
100,0
203
2 1
VT203 BC848 R213
TPS 5.5 GND
C614 10nF
C616 100nF
sc_inR
sc_inL
GND
C626 100nF C625 10,0
_SC1_Rout _SC1_Lout
a9
Z2
L601
a8
C630
10,0 C648 1,0
C632 1,0
SC1_Rout SC1_Lout
+5d
+
SC1_Lin
SIF_SW
+3.3
+3c
3
Z1
_SC1_Rout _SC1_Lout
+5c
10E
WF201
WF202
GND
a3
a4
a5
a6
a7
28
1
2
3
4
5
6
7
8
9
+8b
BC858
206
R129
C210 100p 1N4148
234
VT201
GND
3
WF212 WF601
SW
SIF
C201 2.2n
10,0
GND VD203
VDDH
235
R205 91E
GNDC
VMC1
VMC2
VDCC
1k
100p R207 27k
GNDAH
r.out1
i.cut1
VREFIF
VREFA
+8
MONOIN
1k VT102 BC848
6
g.out1 4
3
2
1
ETH
233
C202
+
C204 47,0
100n
1
C203
R_in
R125
+8
EXT_V.IN
TJC3-5P
10E
+8d
GND
R201
R203 100E 1
TV_video
VDDP
HPR
HPL
XTI
SCL
IRQ
WS
ST
K103 GND
B
GND
GND
WF207
54
38
30
29
IC601 VT202 L203 BC848 6.8uH 2
STV82x6
10 uH
+
INT_CVBS in
EXT_ CVBS/Y in
A_ext in/Qss_out
P1.2/NT0
+3.3 V
P1.0/INT1_ IR
A_out/AM out
XTAL in
+3.3 V
G out
H_fb/SSC
B/U(b-y)
GndTV1
VPE
+8V
IF_pll
Hout
SVHS_chrom
IF_CVBS out
XTAL out
P1.1/T0
+3.3V
B out
R out
RESET
OSC_gnd
I cutoff
208
R152 100E
R/V(r-y)
EHT
BCL
G/Y
C133 1n
FB
124
R225 100E
C636100,0 1,0 L604
SIF
R619 47k L606 10 uH L607 10 uH L608 10 uH L609 10 uH L603 CB6A GND
P_GND2
SCART-SW_(p3.3/adc3)
S_GND
+OUT2
-OUT2
AV2/AV1 (p2.0/pwm)
AV1/AV2 (p3.1/adc1)
VC1
IN1
MUTE (p3.0/adc0)
IN2
TDA9352 SIF_SW (P0.5)
IC202
VC2
N.C.
+VS
C119 22n VD103 C120 100n UPC574 GND
+5.tun
+
GND C118 4.7 100,0 22n GND
+5
+31
KEY (p3.2/adc2)
ON/OFF_(p1.3)
+12
REFO/AMout
10
11
12
6
5
4
3
2
+5
DEC_dig
GND_cp
GndTV2
DEC_bg
SEC_pll
VssTV3
VDR_A
VDR_B
GND_a
PH2_lf
PH1_lf
SIFagc
SIFin1
AVL
+8 V
SDA
VSC
I_ref
SCL
P0.6
TEST
C122
C123
SDA
SCL
Vcc
R134 3,3k R133 3,3k
SIFin2
6
8
7
5
IF_in1
IF_in2
R252 47k
R243 4.7k
1
AGC
VD602 7,5v
MUTE
+5 st.by
MUTE1 R639 10k C653 10n GND R628 1E
+ C638
R638 6,8k R621 10k TT601
_IN_L C641 _IN_R 470n C650
_INL _INR
C647 -OUT1 100n C655 1n 470n C651 GND 470,0
+
13
1
2
3
4
5
6
7
8
9
+8
X605 TJC3-6P
10E
L611 F-BEAD L610 F-BEAD 4 3 2
X606A
+OUT1
24C08W6
10
11
12
13
220n 14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
KY7
s.w8
32
1
2
3
4
5
6
9
C225
C232
100E
220n
218
100E
GND
100E
R230 100E
10k 242
39.2k
sda.tun
SDA
100E AV1/2
GND
+
C226
MUT
R135 100E R136 100E
L105 22 uH
IC201
SDA.
SCL.
GND
213
241
214
A0
A1
A3
R233 100E
4.7
0,1v (0,9v)
WF213
215
220
+ 224
C247 2.2 +3.3
+15
1,0
+OUT2 -OUT2
100n
1
2
3
4
C233
scl.tun
SCL
C228 100n
+
R229
R250
R232
GND C227 1,2n
R231
R249
C230
R236
+
GND C235 100n WF401 WF217 R407 1k 7
R234
GND
R241 1.2k
10k
R143 12k VD105
+
GND C135
agc_
1 1n GND R141 680E
301
10k
X203 2
WF214 R242 2,2k R251 2,2k
C237 100,0
1n
6
5
4
3
2
+8e
4,7n R237 15k C244 1n
VD+ VDIF1
+
C241
22n
1
C238
C240
R137 10k
GND
IC401
STV9302A
2.2
R631 1E 16 om speakers option: R628 - 0.68 om/2w R628 - W 15,24 mm WF404
1,2k
C654 100n
GND
C652 100n
L612 F-BEAD R627 10E 4
L613 F-BEAD WF604
1
1 TJC3-4P
X501 3 2 1 1
V DEFLECTION COIL
401
VD+
406
TT401 TT402 R402 470E C403 100n R403 6,8E R404 3,3E R409 24E GND
512
404
C401 22n C408 1n R401 2,7k
405
C402 WF403 C404 47,0
408
+
R142 47k
GND
ON/OFF
R240
R238
TJC3-2P-2A
MUTE AGC
L206 22 uH
SIF_SW S.SW KEY +8
216
C243 1,0
R405 2,7k
100n
402
WF216
IF2 AGC SIF1 SIF2
+3.3
TU101
336
GND
300 v
C311 1n R301 MF72A 1n 1 1n C301 1n VD301 1N4007 VD302 1N4007 C303 100,0
+
RED COLOR - OPTRON OPTION 4
R307 39k C325 27n
340
1
IC305 TLP621
1k RU4YX
+15
+
303 R327
R321 0,22E GND
VD312 C326
WF402
14
C407 1n GND C501 470,0
VD401 1N4002 R504 0,47E
518
VD305 1N4007 VD304 1N4007 304
3
2 T301 BCK-35-001A7
7 8
305
C328 1000,0
GND
+
500 v
R310 39k
329
15k R328 27k
680p R315 0,22E VD309 RU4AM
327
+
C318 100,0
R326 1k
+8 +110
C406 100n VD501 1N4148
GND R312 12k
+31 FLYB +12
C305 47,0
328
+
VD306
318
R304 150k
GND
501
VD503 RGP15J
VD308 RG2 WF301, WF302
10
316
3
C317 470p GND R308 0,1E VD303 RU4YX R330 100k C309 680p
325
302
1N4148 R303
WF303
9 2 13 14
GND 3 C307 470,0
+
IC302 LM317 2
C314 220n
12,5 v
R311 10E VD315
8 v (1,28 v)
+8
VD505R505 1N4148 GND
+110
1k
*
WF503 1 5 4
C310
C304
317
STP5NK60Z
321
1
9,6+5%-3% nF
TT501
L301 ET2448
308
TT502
1
307
324
W 5,08 mm for optron
3 C319 220n
5 R314 1k
323 306
GND Rt/Ct
Isens Vref
3 8
320
312
314
6
11
4
C320 4,7n
+
C323 1n
334
R318 1k WF306 R319 10k
VD310
313
C336 4.7n 309 VD316 TL431 R331 2,2k 310 RP302 220 om
+
RGP15D VD311 RGP15D R320 0,27E
10 v
332
R309 27 om 1 C332 100n
C330 100n 3 GND C327
+
511
MZ73K18RM270
180k
2,5 v2
COMP Vfb
Vcc OUT
12
6
311
R317 680E
100n
1.2k 1
VT302 BC848 1
505
3 2 1
5
11
2
4
RV301
1
7
R305
2 IC304 L7805
ON/OFF
VT502 2SC2383 C512
H.DR 519
C509
331
R313
333
UC3842
VT301
1
WF305
1N4148
R323 27E
GND C130
1
C308 470p
4,7k /(8.2k for optron) IC301
315
VD307 1N4148
6,8v 0,5v
330
C324
1n
R302 220 om
+
C334 0,47
+
C302 100,0
C306 100n
L501 WF501 C511 4.7n 100 uH C507 22,0 T502 GND
504
+
3
GND
R306 1k
VT501 ST1803DHI 503
3
520
2 1
IC303 GND L78L33ACZ 3
+
GND
+5
100n VD507 1N4148 VD509 1N4002
WF502 4 HD.TR GND C515
+
3,3v
2 C313 100,0 C333 100n GND
X302 2
~220V
C331 100,0
2
1
R508 270E GND
E1
F301 1 3.15 A
R322 820k
X301 TJC2-2P-2A
DEGAUSSING COIL
RP301 470 om
C315 4,7n
R316 12k WF304
R325 12mOM C322 2.2n WF307 GND_EARTH GND
100n
14
2
C316 10n
C321 47,0
GND
+3.3 +12 ETH
SQP-3.96-3P-2A
C312 100,0
VD510 1N4002
100,0
+
C134 100n
1N4148 C124 22,0
WF215 GND
-14
R408 C405 100n R501 0,47E 8
515
H DEFLECTION COIL
A
B
VD-
R406
GND
3E
TJC2-5P-4A
C502 470,0
516
VD502 RGP15J C503 680p
517
8
HV
C504 680p
9 GND 7 2 GND 3
R502 1k
L502 HL105UH
9
7 2
TT503 C517 100n
FV
521 VD504 RGP15J C506
R503 22k
3 1
C505 330n GND 2.2
HV
502
5 SV 4 6
FOCUS SCREEN
6 R506 10k C508 47n R509 180k
+
* C516
330 pF
T501 CF0801-4780
X502 5 4 3
GND
C510 680 pF
VD506 RGP15J R512 2,4E
510
C514 470p
R507 10E GND
C513 10.0
509
2 1 TJC3-5P
2005.10.05
8 om /16 om
217
R630 3,3k
8 om /16 om
R226 100k
R227 3k
R632 220E
-OUT1
*
+OUT1
VT604 BC858
P_GND1
WF212 VF601
TT201
CB6A
+
GND
C611 22p XT601
9
47,0
SDA SCL
R817 75 E X2 X1 X X0 X3
47p
GND
+3,3v
+5
+5
GND 3 1 1 C607 22,0 3 VT603 BC848
+
C608 22,0
R606 390E GND
R616 22k R617 22k C631 1,0
WF604
WF605
SC2_Rin SC2_Lin
WF604
WF605 IC603 TDA7057A R626
R636 10k
R637 10k
GND
WF605
+
+
X903 R902 15k VT901 BF422 2 1 3 VT903 BF422 R905 15k VT904 BF422 2 1 3 VT906 BF422 R908 15k VT907 BF422 2 1 VT908 BF423 C903 2 3 390p 3 C904
+
GZS10-2-104
R_crt
R903 390E
R906 390E
R909 390E VT909 BF422
R912 2.7k R910 2.7k R911 2.7k
8 6 11
R G B
3
R901 330E
C901 390p 2
1
R904 330E
C902 390p
VT905 BF423 2
1
R907 330E
1
VD901 1N4148
VT902 BF423
3
B_crt
G_crt
GND
HET_ HET 9 10 H_crt +180 TT901 TT
G1 5
7
4,7
C905 4,7n GND TT903 TT R915 0,33E 1
R914 0,68E
HETER X902 5 4 3 2 1
SCREEN
6
5
4
3
2
1
TT902 TT
R913 1k
CRT BOARD
GND
X904
FOCUS
1
G2 g2
F
GND
HV
X901 TJC3-6P
TV2KR-2S-v2 CRT
HV
FRONT (SIDE) AV STEREO 2126 (UOC) J701 1 R701 75 2 3 4 5 6 AV3-8.4-5B L706 CB6A L707 10uH L701 R702 33k 10 uH X702 L702 10uH R703 33k L708 CB6A L703 10uH L705 10uH AV_R AV_L AV_sound_GND PH_GND PH_R PH_L 6 5 4 3 2 1 TJC3-3P/3P-6Y-400 C1 100.0
+
X701 Front VIDEO Video_GND 1 TJC3-2P-2Y-500 2
J702
1 2 5
CKX-3.5-02
L704 10uH