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NEC DTE-25G5THS Service Manual
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NEC DTE-25G5THS Service Manual

59/68 cm stereo color television
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S/M No. : TCP785AEFR1
Service manual
59/68 Cm STEREO Color Television
CHASSIS : CP-785A
MODEL : DTE-25G5THS
DTE-29G5TH
FS-59T90
FS-68T90
DTE-25G4ZH
DTE-29G4ZH
FS-59V81
FS-68V81
NEC Corporation
September, 2002

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Summary of Contents for NEC DTE-25G5THS

  • Page 1 S/M No. : TCP785AEFR1 Service manual 59/68 Cm STEREO Color Television CHASSIS : CP-785A MODEL : DTE-25G5THS DTE-29G5TH FS-59T90 FS-68T90 DTE-25G4ZH DTE-29G4ZH FS-59V81 FS-68V81 NEC Corporation September, 2002...

  • Page 2: Table Of Contents

    Contents 1 - Main features 1-1 Specifications 1-2 External Terminals 1-3 Channel table 2 - Safety instruction 3 - Alignment instructions 3-1 Microcontroller configuration : Service mode 3-2 Microcnotroller configuration : Option 3-3 TV set Alignment 4 - IC description 4-1 TDA936x TV signal processor - TXT with embedded -Controller 4-2 MSP34 Multistandard Sound Processor 4-3 TDA894x J Stereo Audio Amplifier...

  • Page 3: Main Features

    Service Manual CP-785A 1-1 Specifications TV standard PAL, - B/G, H Sound system NICAM B/G FM 2Carrier B/G Power consumption 25” : 113W approx. 29” : 118W approx. Sound Output Power 25” : 5W x 5W (at 60% mod, 10% THD) 29”...
  • Page 4 Service Manual CP-785A - SCART (21pin Euro Scart) : Input1 & S-VHS input Signal Matching value N.C. Audio Input Right 0.5 Vrms, Impedance > 10 k N.C. Audio Earth Earth Audio Input Left 0.5 Vrms, Impedance > 10 k N.C. N.C.

  • Page 5: Channel Table

    Service Manual CP-785A 1-3 Channel table FREQUENCY TABLE CP-785A AUSTRALIA N/Z land 46.25 57.25 64.25 86.25 95.25 102.25 138.25 175.25 182.25 189.25 196.25 209.25 216.75 45.25 55.25 62.25 203.25 210.25 217.25 471.25 479.25 487.25 495.25 503.25 511.25 519.25 527.25 534.25 541.25 548.25 555.25...
  • Page 6 Service Manual CP-785A AUSTRALIA N/Z land 631.25 638.25 645.25 652.25 659.25 666.25 673.25 680.25 687.25 694.25 701.25 708.25 715.25 722.25 729.25 736.25 743.25 750.25 757.25 764.25 771.25 779.25 786.25 793.25 800.25 807.25 814.25 105.25 112.25 119.25 126.25 133.25 140.25 147.25 154.25 161.25 168.25...
  • Page 7 Service Manual CP-785A AUSTRALIA N/Z land 238.25 245.25 252.25 259.25 266.25 273.25 280.25 287.25 294.25 303.25 311.25 319.25 327.25 335.25 343.25 351.25 359.25 367.25 375.25 383.25 391.25 399.25 407.25 415.25 423.25 431.25 439.25 447.25 455.25 463.25...

  • Page 8: Safety Instruction

    Service Manual CP-785A 2 - 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.

  • Page 9: Alignment Instructions

    Up-Conner Dn-Conner EW Trapezium 0,1,2,3 : For D/W Remote controller Option 4,5,6,7 : For NEC Remote controller CH Lock “Hotel Lock” will be changed to “CH Lock” HOTEL Lock HOTEL Max Vol “Hotel Max Vol” will be changed to “Max Vol”...
  • Page 10 Service Manual CP-785A...

  • Page 11: Tv Set Alignment

    Service Manual CP-785A 3-3 TV set Alignment 3-3-1 - G2 alignment - TV in AV mode without video signal Black screen. - TV preset with WP Red, WP Green and WP Blue equal to 32. - TV preset with Black R, Black G equal to 32. - Set TV in NORMAL I mode - Adjust screen volume ( on FBT ) such that the highest cathod cut-off voltage measured on CRT board, is V cut off...
  • Page 12 Service Manual CP-785A H. Bow Up Corner H.Width Dw Corner 3-3-7 - AGC - Adjust the antenna signal level at 68 dBV 2 (UHF - CH25) - Set RF AGC to 0. - Increase RF AGC level and stop when the level on pin 6 of TDA936x goes below 2.5 Vdc -11-...

  • Page 13: Ic Description

    Service Manual CP-785A 4 - IC description 4-1 TDA936x TV signal processor - Teletext decoder with embedded -Controller. - TDA936x : TEXT Available - TDA938x : TEXT Not Available CHASSIS(MODELS) IC MARKING TEXT TV STANDARD Version History CP-785A, AF TDA9365 10 PAGE TEXT TDA-9365/N1(otp) (DTE-xxxxTHx)
  • Page 14 Service Manual CP-785A -Controller 80C51 -controller core standard instruction set and timing 1 s machine cycle 32 - 128Kx8-bit late programmed ROM 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 WatchDog timer Auxiliary RAM page pointer...
  • Page 15 Service Manual CP-785A Contrast reduction of defined area Cursor Special Graphics Characters with two planes, allowing four colours per character 32 software redefinable On-Screen display characters 4 WST Character sets (GO/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 Data Capture The Data Capture section takes in the analogue Composite Vidéo and Blanking Signal (CVBS), and from...
  • Page 16 Service Manual CP-785A AUDEXT (20) SIFIN QSSOUT/AMOUT AMOUT RESET LED OUT (2x) 10/11 VST OUT ADC IN (4x) I/O PORTS (4x) 1+62-64 -15-...
  • Page 17 Service Manual CP-785A PINNING SYMBOL DESCRIPTION n.u. Port 1.3 Not used. I2C bus clock line I2C Data line SECAM L Port 2.0 : High when L selected (PushPull ) 　 Port 3.0 : Over Current Protection RF AGC in ADC 1 : For factory use only ( High impedance ) Key-in ADC 2 : local key input ( High impedance ) S/SW...
  • Page 18 Service Manual CP-785A SYMBOL DESCRIPTION G2IN 2nd G input B2IN 2nd B input BCLIN beam current limiter input BLKIN black current input RED Output GREEN Output BLUE Output VDDA analog supply of Teletext decoder and digital supply of TV-Processor (3.3V) OTP programming supply VDDC digital supply to core (3.3V)
  • Page 19 Service Manual CP-785A P1.3/T1 P1.2/INT0 P1.6/SCL P1.1/T0 P1.7/SDA P1.0/INT1 P2.0/TPMW VDDP P3.0/ADC0 RESET P3.1/ADC1 XTALOUT P3.2/ADC2 XTALIN P3.3/ADC3 OSCGND VSSC/P VDDC P0.5 P0.6 VDDA VSSA SECPLL DECDIG BLKIN PH2LF BCLIN PH1LF B2/UIN GND3 G2/YIN DECBG R2/VIN AVL/EWD INSSW2 VERB AUDOUT/AMOUT VERA CHROMA IFIN1...

  • Page 20: Msp34 Multistandard Sound Processor

    4-2 MSP34xxx Multistandard Sound Processor The MSP34xxx is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards. CP-785A = DTE-25G5THS(FS-59T90) MSP34xxx MSP3410D, 3415D, 3410G, 3415G Stereo(Nicam& 2-Carrier) DTE-29G5TH(FS-68T90) CP-785AF=DTE-21U6TH(PF-51T31)
  • Page 21 Service Manual CP-785A DSP-Section (Audio Baseband Processing) - flexible selection of audio sources to be processed - performance of terrestrial de-emphasise systems (FM, NICAM) - digitally performed FM-identification decoding and de-matrixing - digital baseband processing: volume, bass, treble - simple controlling of volume, bass, treble Analogue Section - two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25 k...
  • Page 22 Service Manual CP-785A TV standards TVsystem Position of sound carrier(MHz) Sound modulation Color system Remark 5.5 / 5.7421875 FM Stereo Applied 5.5 / 5.85 FM-Mono / NICAM Applied 6.5 / 5.85 AM - Mono / NICAM SECAM-L 6.0 / 6.552 FM-Mono / NICAM 6.5 / 6.2578125 D/K1 FM Stereo...
  • Page 23 Service Manual CP-785A Pin No. Pin Name Type Short description Test pin Test pin DVSUP Digital power supply +5V DVSS Digital Ground Not Connected Not Connected Not Connected Not Connected RESETQ Power-On-reset Not Connected Not Connected VREF2 Reference ground 2 high voltage part DACM_R Loudspeaker out Right DACM_L...

  • Page 24: Tda894X J Stereo Audio Amplifier

    Service Manual CP-785A 4-3 TDA894xJ family Stereo Audio Amplifier The TDA8946J is a dua-channel audio power amplifier with an output power of 2 x 7W at an 8 ohm load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic.

  • Page 25: Tda835Xj Vertical Amplifier

    Service Manual CP-785A V CC1 V CC2 OUT1- IN1- IN1+ OUT1+ TDA8944J OUT2- IN2- IN2+ OUT2+ V CC STANDBY/ MODE MUTE LOGIC SHORT CIRCUIT TEMPERATURE PROTECTION MBK933 GND1 GND2 4-4 TDA835xJ Vertical Amplifier The TDA835xJ are power circuit for use in 90° and 110° colour deflection systems for field frequencies of 25 to 200Hz and 16/9 picture tubes.
  • Page 26 Service Manual CP-785A 4-4-1 TDA8358J i(pos) An East-West output stage is provided that is able to sink current i(neg) from the diode modulator circuit. Features : Few external components Highly efficient fully DC-coupled vertical output bridge circuit Short rise and fall time of the vertical flyback switch TDA8358J GND v Guard circuit...

  • Page 27: Tda6107Q

    Service Manual CP-785A 4-5 TDA6107Q The TDA6107Q includes three video output amplifiers in one plastic DIL-Bent-SIL 9-pin medium power package, using high voltage DMOS technology, and is intended to drive the three cathodes of a colour CRT directly. To obtain maximum performance, the amplifier should be used with black-current control. Features Typical bandwidth of 5.5 MHz for an output signal of 60 Vpp High slew rate of 900V/s...

  • Page 28: 24C08 8 Kbit Eeprom

    Service Manual CP-785A MIRROR 1 MIRROR 5 TDA6107Q CASCODE 1 3x 3 x MIRROR 4 oc(3), 9,8,7 CURRENT oc(2), SOURCE oc(1) THERMAL PROTECTION DIFFERENTIAL REFERENCE CIRCUIT STAGE i(1), 1,2,3 MIRROR 3 o(m) i(2), i(3) CASCODE 2 MIRROR 2 MGK278 4-6 24C08 8 Kbit EEPROM features : 8 Kbit serial I2C bus EEPROM Single supply voltage : 4.5 V to 5.5 V...

  • Page 29: Str-F665X

    Service Manual CP-785A 4-7 STR - F665X 4-7-1 General description The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 4-7-2 Features Small SIP fully isolated molded 5 pins package Many protection functions : * Pulse-by-pulse overcurrent protection (OCP) * Overvoltage protection with latch mode (OVP)
  • Page 30 Service Manual CP-785A 4-7-4 Pins description name symbol description Overcurrent / feedback O.C.P./ F.B. Input of overcurrent detection signal and feedback signal Source MOSFET source Drain MOSFET drain Supply Input of power supply for control circuit Ground Ground 4-7-5 Control part electrical characteristics IC pins symbol rating...

  • Page 31: Circuit Description

    Service Manual CP-785A 5 - Circuit description 5-1 Block diagram To CRT board RGB out ext RGB in chroma in -30-...
  • Page 32 Service Manual CP-785A FUNCTIONAL DESCRIPTION OF VIDEO PROCESSOR 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 -Controller/Teletext decoder as a reference.
  • Page 33 Service Manual CP-785A In the TDA936x series, the following geometry parameters can be adjusted for all picture tubes : Horizontal shift Vertical amplitude Vertical slope S-correction Vertical shift The types which are intended to be used in combination with 110° picture tubes have an East-West control circuit.
  • Page 34 Service Manual CP-785A the desired free-running frequency and the bandgap reference to obtain the correct absolute value of the output signal. The VCO of the PLL is calibrated during each vertical blanking period, when the IC is in search or SECAM mode. The base-band delay line (TDA 4665 function) is integrated.
  • Page 35 Service Manual CP-785A 5-2 IF The TDA936x has an alignment free IF PLL demodulator. The fully integrated oscillator is automatically calibrated, using the 12 Mhz crystal as a frequency reference. The IF frequency is simply set in TV- Processor by I2C bus. The AFC information is available via I2C bus from the TV-Processor status bytes.

  • Page 36: Source Switching

    Service Manual CP-785A 5-3 Source switching The TDA936x has only one external video input, the external video switching circuit made with Q504, Q505 and Q508 allows 2 external video signal inputs. The switching command can be the -Controller pin 8 when the software takes control of the video source. The -Controller pin 8 is automatically configured by the controlling software (See table below).

  • Page 37: Sound Processing

    Service Manual CP-785A High impedance This mode can be used for input only operation of the port. Special port for LED Pin 10 and 11 have the same functionality as the general I/O pins but in addition, their current source and sink capacity is 8 mA instead of 4 mA.

  • Page 38: Sound Amplification

    Service Manual CP-785A In case of NICAM - mode, the phase samples are decoded according the DQPSK - coding scheme. The output of this block contains the original NICAM bitstream. DSP section All audio baseband functions are performed by digital signal processing (DSP). The DSP section controls the source and output selection, and the signals processing.

  • Page 39: Vertical Deflection

    Service Manual CP-785A Mute : In this mode the amplifier is DC biased but not operational (no audio output). This allows the input coupling capacitors to be charged to avoid pop-noise. The devices is in mute mode when 2.5 V < <...

  • Page 40: Power Supply (Str-F6654)

    Service Manual CP-785A 5-8 Power supply (STR-F6654) 5-8 -1 STR-F6654 general description The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 5-8 -2 Power supply primary part operations An oscillator generates pulses signals which turn on and off a MOSFET transistor.
  • Page 41 Service Manual CP-785A When the power switch is pushed on, V increases slowly. During this time, C806 is charged through R802. As soon as V reaches 16V, the STR-F6654 control circuit starts operating. Then, VIN is obtained by smoothing the winding voltage which appears between pin6 and pin7 of the SMPS transformer. As this winding voltage does not increase to the set voltage immediately after the control circuit starts operating, V starts dropping.
  • Page 42 Service Manual CP-785A * STR-F665X oscillating operation TO PIN4 SM PS STR-F6650 D R A I N D R I V E Comp.1 V th(1) SOURCE R808 1.35mA From PIN 6 OCP/FB SM PS ( F E E D B A C K ) V th(2) R804 C850...
  • Page 43 Service Manual CP-785A When the MOSFET is ON, the STR-F6650 internal capacitor C1 is charged at the constant voltage 6.5V. At the same time, the voltage at pin 1 (OCP / FB) increases with the same waveform as the MOSFET drain current.

  • Page 44: Tv Start-Up, Tv Normal Run And Stand By Mode Operations

    Service Manual CP-785A 5-9 TV start-up, TV normal run and stand-by mode operations 5-9-1 TV start-up operations * Schematic diagram for start-up operations I823 REG 3.3V G N D O U T RESET PULSE CIRCUIT O U T L511 L512 L510 Vddp Vddc VddA...
  • Page 45 Service Manual CP-785A . If the TV set was on normal run mode before switching off, the microcontroller delivers horizontal drive voltage at pin 33 and picture appears on screen. . If the TV set was on stand-by mode before switching off, the microcontroller switches TV set to stand- by mode, decreasing power pin voltage (pin 63).
  • Page 46 Service Manual CP-785A * Reset pulse circuit operations description - When DC supply voltage from I823 regulator starts rising (from 0V to 1.2V), no current flows through D591 zener diode. So, Q510 is in off mode. Also V =Vcc/2 -Vcc = -Vcc/2 > -0.6V. So, Q511 is in off mode. be Q511 Then, no voltage reaches I501 pin 60.
  • Page 47 Service Manual CP-785A On normal run mode, I501 microcontroller pin 63 (power) is set to high So, I810 controlled rectifier is not conducting - Q809 is conducting. So, Q808 is not conducting and Q807 is conducting - So, Q807 collector is connected to the ground and I810 controlled rectifier gate pin is set to low (no conducting) So, current from 11V DC voltage (from T801 SMPS transformer pin 13) does not flow through Q811 and Q810 transistors but flows through I806 IC error amplifier...
  • Page 48 Service Manual CP-785A * power supply functioning during TV set normal run mode - I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary part diodes and electro capacitors (by example by D820 and C813 on 143V supply voltage line). - 8V, 5V, 3.3V supply voltage lines have stabilized voltages obtained by I820, I822, I823 voltage regulators.
  • Page 49 Service Manual CP-785A -48-...
  • Page 50 Service Manual CP-785A I810 CONTROLLED RECTIFIER 6V DC HIGH R829 R830 R820 C830 HIGH Q807 Q808 HIGH POWER Q809 I810 controlled rectifier switching circuit * TV set stand-by mode operations -On stand-by mode, I501 microcontroller pin 63 (power) is set to low. - So, Q809 collector is set to high.

  • Page 51: Service Parts List

    48A8304800 SS-78128F04 10W 8OHM FS-xxV81 only ZZ230 PCB Main Assembly PTMPMSD393 DTE-29G5TH (OLD) FS-68T90 (OLD) PTMPMSD694 DTE-29G5TH (NEW) FS-68T90 (NEW) PTMPMSD392 DTE-25G5THS (OLD) FS-59T90 (OLD) PTMPMSD695 DTE-25G5THS (NEW) FS-59T90 (NEW) PTMPMSD634 DTE-29G4ZH FS-68V81 PTMPMSD635 DTE0-25G4ZH FS-59V81 ZZ290 PCB Control Assembly...
  • Page 52 Service Manual CP-785A -51-...
  • Page 53 Service Manual CP-785A -52-...
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  • Page 60 Service Manual CP-785A Service Manual CP-785A -59- -59-...

  • Page 61: Function & Cabinet Difference Part

    Service Manual CP-785A -60-...

  • Page 62: All Electrical Parts List

    Service Manual CP-785A 6-4. All Electrical Parts List 6-4-1. Old Main PCB Assembly Parts List (for old FS-xxT90 Models) - The old Main Assembly will be changed. (October 2002) - This old PCB do not support FS-xxV81 Models PART NAME PART Code PART Description Remark...
  • Page 63 Service Manual CP-785A PART NAME PART Code PART Description Remark C520 C CERA CCZB1H102K 50V B 1000PF K (AXIAL) C521 C CERA CCZB1H102K 50V B 1000PF K (AXIAL) C523 C CERA SEMI CBZF1H104Z 50V F 0.1MF Z C524 C MYLAR CMXL1J104J 63V MEU 0.1MF J C525...
  • Page 64 Service Manual CP-785A PART NAME PART Code PART Description Remark C617 C CERA SEMI CBXF1H104Z 50V F 0.1MF Z (TAPPING) C618 C ELECTRO CEXF1C470V 16V RSS 47MF (5X11) TP C620 C CERA CXCH1H509D 50V CH 5PF D (TAPPING) C621 C CERA CXCH1H509D 50V CH 5PF D (TAPPING) C622...
  • Page 65 Service Manual CP-785A PART NAME PART Code PART Description Remark C835 C ELECTRO CEXF1H470V 50V RSS 47MF (6.3X11) TP C840 C ELECTRO CEXF1C222V 16V RSS 2200MF (16X31.5) TP C841 C ELECTRO CEXF1C222V 16V RSS 2200MF (16X31.5) TP C844 C ELECTRO CEXF1E101V 25V RSS 100MF (6.3X11) TP C850...
  • Page 66 Service Manual CP-785A PART NAME PART Code PART Description Remark D810 DIODE DRGP15J--- RGP15J D811 DIODE ZENER DMTZJ5R6B- MTZJ 5.6B D820 DIODE DRGP30J--- RGP30J D821 DIODE DRGP15J--- RGP15J D822 DIODE ZENER DMTZJ9R1C- MTZJ 9.1C D824 DIODE D1N4148--- 1N4148 (TAPPING) D825 DIODE D1N4148--- 1N4148 (TAPPING)
  • Page 67 Service Manual CP-785A PART NAME PART Code PART Description Remark JPA1 JACK PIN BOARD 4859110050 PH-JB-9614D JPA2 SOCKET RGB 4859200401 YRS21-R1 JPA3 JACK PIN BOARD 4859108450 YSC03P-4120-14A L101 COIL PEAKING 5CPZ100K02 10UH K (AXIAL 3.5MM) L350 COIL PEAKING 5CPZ109M04 1UH 10.5MM M (LAL04TB) L381 COIL PEAKING 5CPZ109M04...
  • Page 68 Service Manual CP-785A PART NAME PART Code PART Description Remark Q807 TKTC3198Y- KTC3198Y Q808 TKTC3198Y- KTC3198Y Q809 TKTC3198Y- KTC3198Y Q810 TKTC3198Y- KTC3198Y Q811 TKTC3198Y- KTC3198Y R101 R CARBON FILM RD-AZ473J- 1/6 47K OHM J R102 R CARBON FILM RD-AZ472J- 1/6 4.7K OHM J R103 R CARBON FILM RD-AZ123J-...
  • Page 69 Service Manual CP-785A PART NAME PART Code PART Description Remark R506 R CARBON FILM RD-AZ332J- 1/6 3.3K OHM J R507 R CARBON FILM RD-AZ101J- 1/6 100 OHM J R508 R CARBON FILM RD-AZ332J- 1/6 3.3K OHM J R509 R CARBON FILM RD-AZ681J- 1/6 680 OHM J R512...
  • Page 70 Service Manual CP-785A PART NAME PART Code PART Description Remark R597 R METAL FILM RN-4Z1502F 1/4 15K OHM F R598 R METAL FILM RN-4Z1502F 1/4 15K OHM F R599 R CARBON FILM RD-AZ101J- 1/6 100 OHM J R605 R CARBON FILM RD-AZ751J- 1/6 750 OHM J R606...
  • Page 71 Service Manual CP-785A PART NAME PART Code PART Description Remark R830 R CARBON FILM RD-AZ332J- 1/6 3.3K OHM J R840 R CARBON FILM RD-4Z220J- 1/4 22 OHM J R841 R CARBON FILM RD-2Z479J- 1/2 4.7 OHM J R850 R CARBON FILM RD-2Z479J- 1/2 4.7 OHM J R855...
  • Page 72 Service Manual CP-785A 6-4-2. New Main PCB Assembly Parts List (for FS-xxV1 & New FS-xxT90 Models) - The old Main Assembly of FS-xxT90 will be changed. (October 2002) PART NAME PART Code PART Description Remark A001 PCB MAIN 4859806493 330X246 S1B C101 C ELECTRO CEXF1H100V...
  • Page 73 Service Manual CP-785A PART NAME PART Code PART Description Remark C521 C CERA CCZB1H102K 50V B 1000PF K (AXIAL) C523 C CERA SEMI CBXF1H104Z 50V F 0.1MF Z (TAPPING) C524 C MYLAR CMXL1J104J 63V MEU 0.1MF J C525 C CERA CCXB1H102K 50V B 1000PF K (TAPPING) C526...
  • Page 74 Service Manual CP-785A PART NAME PART Code PART Description Remark C617 C CERA SEMI CBXF1H104Z 50V F 0.1MF Z (TAPPING) C618 C ELECTRO CEXF1C470V 16V RSS 47MF (5X11) TP C620 C CERA CXCH1H509D 50V CH 5PF D (TAPPING) C621 C CERA CXCH1H509D 50V CH 5PF D (TAPPING) C622...
  • Page 75 Service Manual CP-785A PART NAME PART Code PART Description Remark C835 C ELECTRO CEXF1C470V 16V RSS 47MF (5X11) TP C840 C ELECTRO CEXF1C222V 16V RSS 2200MF (16X31.5) TP C841 C ELECTRO CEXF1C222V 16V RSS 2200MF (16X31.5) TP C844 C ELECTRO CEXF1E101V 25V RSS 100MF (6.3X11) TP C850...
  • Page 76 Service Manual CP-785A PART NAME PART Code PART Description Remark D820 DIODE DRGP15J--- RGP15J D821 DIODE D1N4937G-- 1N4937G (TAPPING) D824 DIODE D1N4148--- 1N4148 (TAPPING) D825 DIODE D1N4148--- 1N4148 (TAPPING) D830 DIODE D1N4937G-- 1N4937G (TAPPING) D831 DIODE D1N4937G-- 1N4937G (TAPPING) D840 DIODE D1N4148--- 1N4148 (TAPPING)
  • Page 77 Service Manual CP-785A PART NAME PART Code PART Description Remark I823 IC REGULATOR 1LP295033- LP2950 3.3V I901 IC VIDEO AMP 1TDA6107Q- TDA6107Q JA01 WIRE COPPER 85801065GY AWG22 1/0.65 TIN COATING FS-xxV81 JA02 WIRE COPPER 85801065GY AWG22 1/0.65 TIN COATING FS-xxT90 JA04 WIRE COPPER 85801065GY...
  • Page 78 Service Manual CP-785A PART NAME PART Code PART Description Remark PWC1 CORD POWER AS 4859903010 KKP560+BL102NG+TUBE=2600 Q101 TKTC3198Y- KTC3198Y Q401 TST2009DH1 ST2009DH1 COMPATIBLE T2SD2553-- 2SD-2553 Q402 TKTC3229-- KTC3229 Q501 TKTA1266Y- KTA1266Y (TP) Q502 TKTC3198Y- KTC3198Y Q503 TKTC3198Y- KTC3198Y Q504 TKTC3198Y- KTC3198Y Q505 TKTC3198Y-...
  • Page 79 Service Manual CP-785A PART NAME PART Code PART Description Remark R404 R CARBON FILM RD-4Z399J- 1/4 3.9 OHM J R406 R M-OXIDE FILM RS02Z271JS 2W 270 OHM J SMALL R415 R M-OXIDE FILM RS02Z102JS 2W 1K OHM J SMALL R420 R CARBON FILM RD-AZ223J- 1/6 22K OHM J...
  • Page 80 Service Manual CP-785A PART NAME PART Code PART Description Remark R550 R CARBON FILM RD-AZ472J- 1/6 4.7K OHM J R555 R CARBON FILM RD-AZ103J- 1/6 10K OHM J R556 R CARBON FILM RD-AZ472J- 1/6 4.7K OHM J 29 inch R CARBON FILM RD-AZ512J- 1/6 5.1K OHM J 25 inch...
  • Page 81 Service Manual CP-785A PART NAME PART Code PART Description Remark R808 R CARBON FILM RD-4Z911J- 1/4 910 OHM J 29 inch R CARBON FILM RD-4Z102J- 1/4 1K OHM J 25 inch R810 R CARBON FILM RD-4Z102J- 1/4 1K OHM J R811 R CARBON COMP RC-2Z565KP...
  • Page 82 Service Manual CP-785A PART NAME PART Code PART Description Remark SW700 SW TACT 5S50101090 THVH472GCA FS-xxT90 SW701 SW TACT 5S50101090 THVH472GCA FS-xxT90 SW702 SW TACT 5S50101090 THVH472GCA FS-xxT90 SW703 SW TACT 5S50101090 THVH472GCA FS-xxT90 SW704 SW TACT 5S50101090 THVH472GCA FS-xxT90 SW801 SW POWER PUSH 5S40101143...
  • Page 83 Service Manual CP-785A -82-...

  • Page 84: Exploded View

    Service Manual CP-785A 8. Exploded view(DTE-29G5THS) -83-...
  • Page 85 Service Manual CP-785A 8-1 Exploded view(DTE-25G5THS) -84-...

  • Page 86: Pcb Layout

    Service Manual CP-785A 9. PCB Layout 9-1. Old Main PCB -85-...

  • Page 87: New Main Pcb (4859806493)

    Service Manual CP-785A 9-2. New Main PCB -86-...

  • Page 88: Control Pcb (4859833214)

    Service Manual CP-785A 9-3. Control PCB -87-...

  • Page 89: Circuit Diagram

    Service Manual CP-785A 10. Circuit Diagram 10-1 Old Main PCB -88-...

  • Page 90: New Main Pcb & Control Pcb

    Service Manual CP-785A 10. Circuit Diagram 10-2 New Main PCB & Control PCB -89-...
  • Page 91 NEC Corporation 7-1, SHIBA 5-CHOME MINATO-KU, TOKYO 108-8001, JAPAN...

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