Service Manual 37 Cm MONO Colour Television CHASSIS : CP-375 MODEL :14A5
Specifications CRT A34JLL90X01,A34EAC01X06,A34EFU13X01 (OEC) (PHILIPS) (POLKOLOR) System C14M7E : PAL-B/G for West Europe (Non-TXT) C14M7F : PAL-B/G, SECAM-L for France (Non-TXT) C14T7B : PAL- I for U.K (TXT) C14M7B : PAL- I for U.K (Non-TXT) C14T7L : PAL - I/I for Ireland (TXT) C14M7L : PAL - I/I for Ireland (Non-TXT) Main Voltage 230V AC, 50Hz Power Consumption Stand-by mode : 8 Watts Normal operating mode : 39Watts Sound output 1.5 Watts, 10 % THD at RF 60 % mod.
Safety Instruction WARNING: Only competent service personnel may carry out work involving the testing or repair of this equipment. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION.To avoid such hazards, the high voltage must not exceed the specified limit. The nominal value of the high voltage of this receiver is 22-23 at max beam current. The high voltage must not, under any circumstances, exceed 27.5 .
Circuit block Diagram 4
IC Description DW5255M*(Micro-controller & West/East Teletext Decoder) DW5255RM*(Micro-controller & Cyrillic Teletext Decoder) =SDA5255-A*** (SIEMENS Type No.) (1) General Description The TDA5255 contains a slicer for VPS and TTX, an accelerating acquisition hardware module, a display generator for “LEVEL 1” TTX data and a 8 bit u-controller running at 333 nsec cycle time.
• Controller: - 8 bit configuration - 18 MHz internal clock - 0.
DW370M* (Micro-controller for Non-Teletext Model) =TMS370C08A05 ( TI Type No.) =TMS370P08A05 (OTP device) (1) General Description The TMS370C08A05 devices are members of the cMCU370 family single-chip microcontrollers. The cMCU370 family provides cost effective real-time system control through use of the PRISM methodology. The PRISM methodology modular fabrication process integrates analog, digital, linear and power technologies on a single chip, thereby maximizing the total integration strategy.
- 2 S/W Programmable Interrupt Levels - 2 External Interrupt (1 Non-Maskable) - Programmable Rising or Falling Edge Detect • 09 CMOS Compatible I/O Pins - All Peripheral Function Pins Software Configurable for Digital I/O - 6 Bidirectionals, 3 Input Pins • Plastic 42 YSDP Pins Package (3) Block Diagram 15
(4) Pin Description * A : DW5255M*/DW5255RM*, B : DW370M* Pin Name A* B* A* B 1 1 P3.1 T1IC1/CR Symbol Description SYS SECAM-L’ OUT for switching SAW filter L9461 - SECAM-L’ : H - SECAM- L : L 2 2 P0.7/Open Drain A0 BUSSTOP I2C BUS STOP IN for Computer controlled alignment in Factory ( Active Low ) 3 3 P0.6/Open Drain A1 SDA Serial data IN/OUT for I2C 4 4 P0.5/Open Drain A2 SCL Serial clock IN/OUT for I2C 5 5 P0.4/Open Drain A3 OPTION #5 #6 Teletext 6 6 P0.
Pin A* Name B* A* Symbol Description B 26 FIL2 FIL2 PLL Loop Filter I/O for TTX Slicing 27 FIL1 FIL1 PLL Loop Filter I/O for VPS Slicing 28 VCCA VCCA Analog Supply for Slicer 29 IREF IREF Reference Current for Slicer PLLs 30 CVBS CVBS CVBS IN 31 P2.3/8 bit ADC Not Used 32 22 P2.2/8 bit ADC B0/AN0/ADC AGC IF AGC INPUT for Auto Tuning System 33 23 P2.1/8 bit ADC B1/AN1/ADC KS Local KEY SCAN IN 34 24 P2.
CAT24C08P (E2 PROM) (1) Typical Features • IC Bus compatible • Low power CMOS Technology • 16 Byte page write Buffer • Self-Timed Write cycle with Auto-Clear • 100,000 program/Erase cycles • 100 Year Data Retention • Optional High Endurance Device Available (2) Description The CAT24C08P is a 8K bit serial CMOS E2 PROM internally organized as 1024x8bits. The CAT 24C08P features a 16 byte page write buffer.
TDA8374A (Single chip TV Processor for Negative modulation IF ) TDA8374 (Single chip TV Processor for Negative & positive modulation IF) (1) General Description The TDA8374(A) is I2C-bus controlled single chip TV processors which are intended to be applied in PAL/NTSC television receiver. The IC is mounted in a S-DIL 56 envelope.
(3) Block Diagram 20
(4) Pin Description No Name Description 1 SOUND IF INPUT The sound equivalent input impedance is 8k5 ohm // 5pF which has to be taken into account for proper termination of the ceramic filters. The DC impedance is very high. The minimum input signal for catching is l mV rms. 2 EXT AUDIO INPUT An external sound signal (500mVrms) for example from SCART can be applied to this pin via a coupling capacitor. The input impedance is 25kohm.
No Name Description A voltage detection circuit is connected to both pins. - pin12 if V12 <6.8V than a power on reset, POR, is generated. The Hout output is disabled immediate. - pin37 if V37 <5.8V than the horizontal output is disabled immediate. 13 17 INT CVBS INPUT EXT CVBS INPUT It is recommended that the CVBS1 int and CVBS2 ext input amplitudes are 1 Vpp (inclusive sync amplitude). This, because the noise detector switches the 1 loop to slow mode (i.e.
No Name Description to the luminance input pin 27. The pin is internally AC coupled to the luminance clamp via a capacitor of 50pF; clamping action occurs during burstkey period. 28 LUMINANCE OUTPUT The luminance output signal is approximately l V black-white with typical output impedance of 25O ohm. 29 30 B-Y OUTPUT R-Y OUTPUT The maximum output impedance of pins 29 and 30 is 500 when PAL/NTSC signals are identified.
No Name Description A flash protection becomes active when this pin is forced >6V. The horizontal drive is switched-off immediately. Once the voltage is <6V the horizontal drive is switched-on again via the slow start procedure. 43 PHI-1 FILTER The loopfilter connected to pin 43 is suitable for various signal conditions as strong/weak and VCR signal. This is achieved by switching of the loopfilter time constant by changing the PHI-1 output current.
TDA4665(Base Band Delay Line) (1) Features • Two comb filters, using the switched-capacitor technique,for one line delay time (64µs) • Adjustment free application • No crosstalk between SECAM colour carriers • Handles negative or positive colour-difference input signals • Clamping of AC-coupled input signals(±(R-Y)and±(B-Y)) • VCO without external components • 3MHz internal clock signal derived from a 6MHz VCO, line-locked by the sandcastle pulse (64µs line) • Sample-and -hold circuits and low-pass filters
TDA8395 (Secam Decoder) (1) Features Fully integrated filters Alignment free For use with baseband delay (2) Description The TDA8395 is a self-calibrating,fully integrated SECAM decoder. The IC should preferably be used in conjunction with the PAL/NTSC decoder TDA8362 and with the switch capacitor baseband delay circuit TDA4665. The IC incorporates HF and LF filters, a demodulator and an identification circuit (Iuminance is not processed in this IC).
TDA6106Q ( Video Output Amplifier ) (1) General Description The TDA6106Q is a monolithic video output amplifier (5MHz bandwidth) in a SIL 9 MPpackage, using high-voltage DMOS technology, and is intended to drive the cathode of CRT directly . To obtain maximum performance, the amplifier should be used with black-current control.
STV8225 ( AM SIF Circuit ) (1) General Description The STV8225 is intended for the demodulation of the AM sound of the L standard.
TDA8356 (DC-coupled vertical deflection circuit) (1) General Description The TDA8356 is power circuit for use in 90 and 110 color deflection systems for field frequencies of 50 to 120 Hz. The circuit provides a DC driven vertical deflection output circuit, operating as a high efficient class G system.
TDA7056 (BTL AUDIO OUTPUT AMPLIFIER) (1) Features • No external components • No switch-on/off clicks • Good overall stability • Low power consumption • Short circuit proof • ESD protected on all pins (2) General Description The TDA7056 is a mono output amplifier contained in a 9 pin medium power package. The device is designed for batteryfed portable mono recorders, radios and television. (3)Block Diagram (4)Pin Description PIN DESCRIPTION 1 n.c. 2 Vp 3 input (+) 4 signal ground 5 n.c.
STR-S5707 (Hybrid IC for a Switching Regulator) (1) General Description The STR-S5707 is a Hybrid IC with a built in power transistor and a separate excitation control IC, designed for converter type switching mode power supply applications. The IC is capable of quasi-resonant mode and requires small number of external component.
Electrical Characteristics of Control Part (Ta=25 ) Description Terminal Symbol Rating Unit MIN TYP MAX On-state Voltage 9-2 VIN(ON) 7.6 8 8.4 V Off-state Voltage 9-2 VIN(OFF) 4.6 4.9 5.2 V Operating Circuit Current 9-2 IIN(ON) 15 28 mA Stand-by Circuit Current 9-2 IIN(OFF) 200 A On Time TON 33 41 Off Time TOFF 45 55 OCP terminal Threshold Voltage 6-2 VOCP -1.12 -1 -0.88 V INH terminal Threshold Voltage 1 8-2 VINH-1 0.65 0.75 0.
TDA8138 (5.1V+12V regulator with Disable and Reset) (1) General Description The TDA8138 is a monolithic dual positive voltage regulator designed to provide fixed precision output voltages of 5.1V and 12V at currents up to 1A. A internal reset cuicuit generates a reset pulse when the output 1 decrease below the regulated voltage value. Output 2 can be disabled by TTL input. Shot circuit and themal protections are included. (2) Feature • output currents up to 1A • fixed precision Output 1 voltage 5.
GMS30112-R098 (4-bit Single Chip Microcomputer for Remote control) (1) General Description The GMS30112-R098 is 4-bit single chip CMOS microcomputer. (2) Feature • program memory : 1024 bytes • data memory : 32 x 4 bits • 43 types of instruction set • 3 levels of subroutine nesting • 1 bit output port for a large current (REMOUT signal) • operating frequency : 300kHz - 1 MHz • instruction cycle : 12.5 usec @ 480kHz • CMOS process ( single 3.
(4) Pin Description PIN SYMBOL DESCRIPTION 1,2,3,4 K0,K1,K2,K3 4 bit input port with built in pull up resistor 5,6,7,8,9,10 D0,D1,D2,D3,D4,D5 10 bit output port which can be set or reset pin by pin independently. The output structure is N-channel open drain.
Circuit Description Vision IF amplifier, AFC, video demodulator The IF signal from the tuner is fed through a SAW filter to the differential IF input (pin 48 and 49). The first IF stage consists of 3 AC-coupled amplifiers with a total gain control range of over 66 dB. The reference carrier for the video demodulator is obtained by a PLL carrier regenerator (eliminating notch filter compromises, as in reference tuned circuits for passive carrier regeneration).
This compensates for the storage time of the horizontal deflection transistor. The - 2 loop filter (C) is externally connected to pin 42. The horizontal phase can be given a static off set via I2C-but (HSH “horizontal shift”) A dynamic correction is possible by current feedback into the - 2 loop filter capacitor. To protect the horizontal deflection transistor, the ho rizontal drive is switched off immediately when a power failure ( “ Power-On Reset “ bit POR ) is detected.
Integrated video filters The TDA8374 has alignment-free internal luminance delay, chroma bandpass and chroma trap. They are implemented as gyrator circuits tuned by tracking to the frequency of the chroma Xtal oscillator. The chroma trap in the Y signal path is by-passed when Y/C input is selected (S-VHS ). For SECAM an extra luminance delay is build-in, for correct delay of the luminance signal.
TDA8395 SECAM decoder The TDA8395 is an alignment-free SECAM colour decoder, including a Cloche filter, demodulator and line identification circuit. The Cloche filter is a gyrator-capacitor type. Its frequency is calibrated in the vertical retrace period. The calibration reference( pin 1 ) is obtained from the TDA8374 color X-tal oscillator (pin 33). Pin 7 is a decoupling for the Cloche reference.
The R-Y and B-Y colour difference signals (from TDA8374 pins 30 and 29) are AC-coupled and clamped by the input stages at pins 16 and 14. An internal 6 MHz Current controlled oscillator is line locked via a PLL to the sandcastle pulse at pin 5. This clock drives the delay lines to obtain the required 64 sec. Sample and hold low pass filters supress the clock signal. The original and the delayed signals are added, buffered and fed to the output pins 11 and 12.
This is connected via resistor to +8V. As the beam current increase, the voltage on line BeamCurr decreases. BeamCurr is damped by a integration filter before it is fed back to TDA8374 pin 22. The TDA8374 will decrease the contrast (and eventually the brightness) to limit the average beam current. Video amplifiers Three TDA6106Q integrated video amplifiers drive cathode of the picture tube directly. They are protected against CRT flashover discharges and ESD (electro static discharge).
When the power transistor turns off and a voltage higher than VTH2 is applied to the INH terminal, C3 immediately discharges and then starts charging again. Even after the discharge of energy of a secondary winding is completed, VINH does not immediately increases. When it gets lower than VTH1, the transistor turns on. Stand-By Mode While being in remote control stand-by mode, the output voltage is kept on providing to the secondary side and the power transistor operates at A class mode.
Although it basically functions as protection of VIN terminal against over-voltage, since VIN terminal is usually supplied from the drive winding of the transformer and the voltage is proportional to the output voltage, it also functions against the over-voltage of secondary output which causes when the control circuit opens or in some other events.
Electrical Parts List Components marked with this symbol must only be replaced by a component having identical physical characteristics. MODEL : C14M7E LOC. PART-CODE PART-NAME PART-DESCRIPTION ZZ100 48BRM01A01 TRANSMITTER REMOCON RM-01A01 00030 47P7500001 BATTERY AAM 1.
LOC. PART-CODE PART-NAME PART-DESCRIPTION C412 CEXF2C339V C ELECTRO 160V RSS 3.3MF (8X16) TP C414 CCXB2H471K C CERA 500V B 470PF K (TAPPING) C415 CMXM2A104J C MYLAR 100V 0.1MF J (TP) C416 CCXB2H471K C CERA 500V B 470PF K (TAPPING) C417 CEXF2E330V C ELECTRO 250V RSS 33MF (13X25) TP C418 CCZF1E223Z C CERA 25V F 0.022MF Z (AXIAL) C419 CEXF1C101V C ELECTRO 16V RSS 100MF (6.
LOC. PART-CODE PART-NAME PART-DESCRIPTION C533 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C604 CCZB1H221K C CERA 50V B 220PF K (AXIAL) C605 CZSL1H560J C CERA 50V SL 56PF J (AXIAL) C606 CZSL1H680J C CERA 50V SL 68PF J (AXIAL) C607 CEXD1H100F C ELECTRO 50V RND 10MF (8X11.5) TP C609 CCZB1H181K C CERA 50V B 180PF K (AXIAL) C610 CEXF1H229V C ELECTRO 50V RSS 2.
LOC. PART-CODE PART-NAME PART-DESCRIPTION C712 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TP C713 CCXF1H103Z C CERA 50V F 0.01MF Z (TAPPING) C714 CMXB1H333J C MYLAR 50V EU 0.033MF J (TP) C715 CMXB1H224J C MYLAR 50V EU 0.22MF J (TP) C716 CMXB1H333J C MYLAR 50V EU 0.033MF J (TP) C717 CCZF1E103Z C CERA 25V F 0.01MF Z (AXIAL) C718 CEXF1C470V C ELECTRO 16V RSS 47MF (5X11) TP C720 CCZF1E103Z C CERA 25V F 0.
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LOC. PART-CODE PART-NAME PART-DESCRIPTION J022 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J023 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J024 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J025 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J027 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J028 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J030 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J031 85801065GY WIRE COPPER AWG22 1/0.
LOC. PART-CODE PART-NAME PART-DESCRIPTION J074 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J075 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J076 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J077 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J080 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J081 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J082 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J083 85801065GY WIRE COPPER AWG22 1/0.
LOC. J131 PART-CODE PART-NAME PART-DESCRIPTION 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JH01 4859102130 JACK EARPHONE YSC-1537 JP06 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP08 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP09 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JS01 4859200401 SOCKET RGB SR-21A1 (ANGLE TYPE) JS02 4859108350 JACK PIN BOARD YSC02P-4100-14A L101 58C9780027 COIL CHOKE TRF-1201B (0.97 UH) L103 5CPZ100K04 COIL PEAKING 10UH 10.
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LOC. PART-CODE PART-NAME PART-DESCRIPTION R309 RD-AZ223J- R CARBON FILM 1/6 22K OHM J R310 RD-4Z473J- R CARBON FILM 1/4 47K OHM J R311 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R312 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J R401 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R402 RD-AZ303J- R CARBON FILM 1/6 30K OHM J R403 RD-AZ479J- R CARBON FILM 1/6 4.7 OHM J R404 RD-AZ152J- R CARBON FILM 1/6 1.
LOC.
LOC. PART-CODE PART-NAME PART-DESCRIPTION R623 RD-4Z221J- R CARBON FILM 1/4 220 OHM J R624 RD-AZ303J- R CARBON FILM 1/6 30K OHM J R639 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R701 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R702 RD-AZ332J- R CARBON FILM 1/6 3.3K OHM J R703 RD-AZ332J- R CARBON FILM 1/6 3.
LOC. PART-CODE PART-NAME PART-DESCRIPTION R745 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R746 RD-AZ272J- R CARBON FILM 1/6 2.7K OHM J R748 RD-AZ622J- R CARBON FILM 1/6 6.2K OHM J R749 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R750 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R751 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R753 RD-AZ202J- R CARBON FILM 1/6 2K OHM J R754 RS02Z562J- R M-OXIDE FILM 2W 5.
LOC. PART-CODE PART-NAME PART-DESCRIPTION R909 RD-4Z104J- R CARBON FILM 1/4 100K OHM J R911 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R912 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R913 RC-2Z152J- R CARBON COMP 1/2 1.5K OHM J R920 85801065GY WIRE COPPER AWG22 1/0.
Difference of Parts for CRT NO 1 LOC V901 NAME CRT BARE 2 SCT1 SOCKET CRT 3 SCT2 SOCKET CRT 4 LP03 COIL BEAD 5 LP04 COIL BEAD 6 L405 COIL H-LIN. 7 C410 C MYLAR 8 C411 C MYLAR 9 R413 R C-FILM 10 R415 R FUSIBLE 11 R302 R C-FILM 12 R901-3 R C-FILM 13 P401 CONN WAFER 14 P401A CONN AS 14” OEC A34JLL90X 48A96414P1 ISMM03S 4859303030 — 14” Polkolor A34EFU13X01 4859606640 — ISHS09S 4859302930 — MD-5 5MC0000100 — MD-5 5MC0000100 L-102 58H0000016 1.
Difference of Parts for System NO 1 LOC PWC1 NAME POWER CORD AS C14M7E CW4232 4859903110 G1966M 5PG1966M— TPS5.5MB-TF21 5PXPS5R5MB SFSH5.5MCB-TF21 5PXFSH5R5M - C14T7L, C14M7L CW3222 4859905110 J1952M 5PJ1952M— TPS6.0MB 5PTPS60MBSFSH6.0MCB-TF21 5PXFSH6ROM C14T7B, C14M7B CW3222 4859905110 J1952M 5PJ1952M— TPS6.0MB 5PTPS60MBSFSH6.0MCB-TF21 5PXFSH6R0M - 2 SF101 SAW FILTER 3 Z501 CERA. FILTER 4 Z601 CERA.
NO 33 LOC RL03 NAME R C-FILM C14M7E - C14T7L, C14M7L - C14T7B, C14M7B - 34 RL04 R C-FILM - - - 35 36 RL05 RL06 R C-FILM R C-FILM - - - 37 RL07 R C-FILM - - - 38 RL08 R C-FILM - - - 39 RL09 R C-FILM - - - 40 41 RL10 R101 R C-FILM R C-FILM - - - 42 43 44 45 46 R712 R713 R752 R763 CL07 R C-FILM R C-FILM R C-FILM R C-FILM C CERA - - - 47 CL01 C CERA - - - 48 CL02 C ELECTRO - - - 49 CL03 C CERA - - - 50 CLO4 C ELECTRO - - - 51 CL05 C CERA
Difference of parts for Option -Teletext option Option I701 X701 C719 TTX - West Europe DW5255M* 18MHz 50V EU 0.33uF Non - TTX DW370M* 20MHz - -Antenna option Antenna Type No.
