Changhong Electric 21NF55 Service Manual
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Changhong Electric 21NF55 Service Manual

Changhong Electric 21NF55 Service Manual

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FILE NO. SM-CTV-O-131
COLOR TELEVISION

SERVICE MANUAL

MODEL NO. 21NF55/21PF93
CHASSIS NO. EX-1A1
Please read this manual carefully before service

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Summary of Contents for Changhong Electric 21NF55

  • Page 1: Service Manual

    FILE NO. SM-CTV-O-131 COLOR TELEVISION SERVICE MANUAL MODEL NO. 21NF55/21PF93 CHASSIS NO. EX-1A1 Please read this manual carefully before service...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATIONS ......................1 SAFETY INSTRUCTIONS AND MAINTENANCE ......... 2 X-RAY RADIATION PRECAUTION ..................2 SAFETY PRECAUTION ......................2 PRODUCT SAFETY NOTICE ....................3 SAFETY SYMBOL DESCRIPTION ...................3 MAINTENANCE ..........................4 ADJUSTMENTS ........................5 SET-UP ADJUSTMENTS ......................5 CIRCUIT ADJUSTMENTS ......................

  • Page 3: Specifications

    SERVICE MANUAL SPECIFICATIONS Model Number 21NF55 21PF93 Color PAL4.43, NTSC3.58, NTSC4.43, SECAM system RF system Sound B/G, I, M, D/K system Video system PAL4.43, NTSC3.58, NTSC4.43, PAL-M, PAL-N (50/60Hz) C1～C12 (49.75-85.25MHz, 168.25-216.25MHz) Receiving C13～C57 (471.25-863.25MHz) channel Z1～Z7 (111-167MHz) CATV Z8～Z35 (223-447MHz)

  • Page 4: X-Ray Radiation Precaution

    SERVICE MANUAL INSTRUCTIONS FOR SERVICE SAFETY AND MAINTENANCE WARNING: BEFORE SERVICING THIS CHASSIS, READ THE “X-RAY RADIATION PRECAUTION ” , “ SAFETY PRECAUTION ” AND “ PRODUCT SAFETY NOTICE ” INSTRUCTION BELOW. X-RAY RADIATION PRECAUTION 1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage.

  • Page 5: Product Safety Notice

    SERVICE MANUAL 5. Do not use a magnetized screwdriver when tightening or loosing the deflection yoke assembly to avoid electronic gun magnetized and decrement in convergence of the CRT. 6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons, switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are installed on the original place.

  • Page 6: Maintenance

    SERVICE MANUAL working on the TV with the back removed. This is an international hazard symbol, telling you that the components identified by the symbol have special safety-related characteristics. This symbol tells you that the critical components identified by the FDA marking have special safety-related characteristics.

  • Page 7: Adjustments

    SERVICE MANUAL ADJUSTMENTS SET-UP ADJUSTMENTS The following adjustments should be made when a complete realignment is required or a new picture tube is installed. Perform the adjustments in the following order: 1. Color purity 2. Convergence 3. White balance Notes: ①　...
  • Page 8 SERVICE MANUAL Dummy Wedge Deflection Coil Rubber Wedge Adhesive Purity/Convergence Deflection Yoke Magnet Module Glass Cloth Tapes Fig. 1 6-pole Magnet Fixed 4-pole Magnet Adjust the Angle (Vertical Lines) Rotate Two Tabs At the Same Time (Horizontal Lines) Purity Magnet Adjustment of Magnets Convergence Magnet Assembly Fig.
  • Page 9 SERVICE MANUAL obtained. 2.2 Circumference convergence adjustment 2.2.1 Loosen the clamp screw holding the deflection yoke assembly and allow it tilting. 2.2.2 Temporarily put the first wedge between the picture tube and deflection yoke assembly. Move front of the deflection yoke up or down to obtain better convergence in circumference. Push the mounted wedge in to fix the yoke temporarily.

  • Page 10: Circuit Adjustments

    SERVICE MANUAL CIRCUIT ADJUSTMENT S Preparation: Circuit adjustments should be made only after completion of set-up adjustments. Circuit adjustments can be performed using the adjustable components inside the TV set. For TVs with C bus control, first change the bus data. 1.
  • Page 11 SERVICE MANUAL 4. Focus Adjustment Caution: Dangerously high voltages are present inside the TV. Extreme caution should be exercised when working on the TV with the back removed. 4.1 After removing the back cover, look for the FBT on the main PCB. There should be a FCB on the FBT.
  • Page 12 SERVICE MANUAL 5EWW/6EWW East-West correction (for large-screen only) 5EWP/6EWP East-West parabola correction (for large-screen only) 5UCR/6UCR Upper corner parabola correction (for large-screen only) 5LCR/6LCR Lower corner parabola correction (for large-screen only) 5EWT/6EWT Trapezoidal correction (for large-screen only) 5VSL/6VSL Vertical slope (for large-screen only) Vertical amplitude;...
  • Page 13 SERVICE MANUAL SCON Sub contrast MCON Contrast Max. SCOL Sub color Option set byte 1 Option set byte 2 Option set byte 3 Option set byte 4 Option set byte 5 Option set byte 6 INIT EEPROM initialization Adjusting screen voltage with VG2 Vertical output off STS0/1/2 System status byte...
  • Page 14 SERVICE MANUAL AV RF output: 1: RF output (for models with SCART jack OP_RFTOAV except EX -1A) 0: Monitor output (for models with RCA jack) Teletext language setting (OP-NOT-3/2/1): OP_NOT_1 1XX-English/Arabic OP_NOT_2 011-English/Farsi 010-English/Russian OP_NOT_3 001-English/Ukrainian 000- English/Paneuro User LOGO setting prior to CHANGHONG LOGO: 1: Display OP_USER-LOGO characters can be set by the VOL+/- buttons Power-on auto test back selection:...
  • Page 15 SERVICE MANUAL Farsi (001) Arabic (010) Russian (011) OP_AUTO_LANG2 French (100) German (101) Italian or Indonesian (110) Spanish or Malay (111) OP_FORF Field frequency options (OP-FORS/FORF): AUTO 60HZ, 01-KEEP LAST, OP_FORS 10-FORCE 60HZ, 11-AUTO 50HZ OP_AVON If AV off, then AV on OP_ONPOSITION With HOTEL mode preset, on position is fixed to POS1.

  • Page 16: Structure And Chassis Function Description

    SERVICE MANUAL STRUCTURE AND CHASSIS FUNCTION DESCRIPTION 1. STRUCTURE BLOCK DIAGRAM From IF Pre- Antenna Audio/Video Tuner Amplifier Analog Switc h A101 HEF4053 Input/Output SAWF Band 1,2 Vt,AGC EEPROM IIC BUS AT24C08 Video Amplifier Microcontroller and small signal processor Formed of Rem ote R e m o t e CH05T0108...
  • Page 17 SERVICE MANUAL 2. BLOCK DIAGRAM FOR SUPPLY VOLT-AGE SYSTEM VD491 +190V To CRT RGB PCB VD451 +45V To A100,N401 VD461 +16V T400 To N401 VD471 To A100, N100, N442 N650 +115V VD891 VD871 +15-S +5V-2 N441 To A100 To N600 Bridge Rectifying Power Regulat ion Switch...

  • Page 18: Chassis Description

    SERVICE MANUAL 3. CHASSIS DESCRIPTION 1). General Description EX-1A1 chassis series are applied in 21NF55/21PF93 respectively which uses mainly Philips’ advanced UOC-ultimate chip TDA935X/6X/8X and I C-bus controlled IC. With combination of microcontroller and small signal processor, the TDA935X/6X/8X series feature high-integration, high-performance-to-price ratio and high-reliability and advanced functions with fewer external components, which provide much convenience for manufacturing and technical service.

  • Page 19: Service Data

    SERVICE MANUAL SERVICE DATA 1. KEY ICS TECHNICAL DATA 1.1 Microcontroller and small signal processor TDA935X/6X/8X The super chips TDA935X/6X/8X are good in pins compatibility. Differences among them are shown as follows. TDA9351（48K） PAL/NTSC/SECAM+1 PAGE TELETEST TDA9350（48K） PAL/NTSC+1 PAGE TELETEST TDA9361（64K）...
  • Page 20 SERVICE MANUAL ● 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.
  • Page 21 SERVICE MANUAL ● 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 ●...
  • Page 22 SERVICE MANUAL 3) Block Diagra m...
  • Page 23 SERVICE MANUAL...
  • Page 24 SERVICE MANUAL 4) pinning Table 5 SYMBOL DESCRIPTION P1.3/T1 port 1.3 or Counter/Timer 1 input P1.6/SCL port 1.6 or I C-bus clock line P1.7/SDA port 1.7 or I C-bus data line P2.0/TPWM port 2.0 or Tuning PWM output P3.0/ADCO/PWMO port 3.0 or ADC0 input or PWM0 output P3.1/ADC1/PWM1 port 3.1 or ADC1 input or PWM1 output P3.2/ADC1/PWM2...
  • Page 25 SERVICE MANUAL SYMBOL DESCRIPTION B2/UIN 2nd B input/U (B-Y) input BCLIN beam current limiter input/(V-guard input, note2) BLKIN black current input/(V-guard input, note2) Red output Green output Blue output VDDA analog supply of Teletext decoder and digital supply of TV-processor (3.3V) OTP programming Voltage VDDC...
  • Page 26 SERVICE MANUAL Fig.9 Pin Configuration (SDIP 64)
  • Page 27 SERVICE MANUAL 1.2 EEPROM AT24C08 1) Features ・Data EEPROM internally organized as 1024/2048 2) Pin Configuration bytes and 64/128 pages×16 bytes ・Page protection mode, flexible page-by-page hardware write protection -Additional protection EEPROM of 64/128 bits, bit per data page 1-Protection setting for each data page by writing its protection bit -Protection management without switching WP pin ・Low power CMOS...
  • Page 28 SERVICE MANUAL 1.3 Vertical scan output stage circuit TDA8356/N6 DC-coupled vertical deflection circuit TDA8356 1) Features ● Few external components ● Highly efficient fully DC-coupled vertical output bridge circuit ● Vertical flyback switch ● Guard circuit ● Protection against: Short-circuit of the output pins (7 and 4) Short-circuit of the output pins to VP.
  • Page 29 SERVICE MANUAL 1.4 Electronic switch circuit HEF4053 Triple 2-channel Analog Multiplexer/Demultiplexer 1). Description (low impedance ON-state) by Sn. With The HEF4053 is a triple 2 -channel analog HIGH, all switches are in the high impedance multiplexer/demultiplexer with a common enable OFF-state, independent of S to S and V...
  • Page 30 SERVICE MANUAL Pinning to Y Independent inputs/outputs Independent inputs/outputs 1A to to S Select inputs Enable input (active LOW) to Z Common inputs/outputs 3. Function Table Inputs Channel Fig. 15 Pinning Diagram HEF4053P(N): 16-lead DIL; plastic (SOT38-1) HEF4053D(F): 16-lead DIL; ceramic none (cerdip) Notes...
  • Page 31 SERVICE MANUAL 1.5 Sound power amplifier TDA7057AQ 2×8W Stereo BTL Audio Output Amplifier with DC Volume Control 1). Features 2). General Description ・DC volume control The TDA7057AQ is a stereo BTL output amplifier ・Few external components with DC volume control. The device is designed for ・Mute mode use in TVs and monitiors, but is also suitable for ・Thermal protection...
  • Page 32 SERVICE MANUAL 1.6 Audio effect processor TDA7449 TDA7449 TONE CONTROLDIGITALLY CONTROLLED AUDIO PROCESSORINPUT MULTIPLEXER 1) Features - 2 stereo inputs - selectableinput gain for optimal Adaptationto different sources One stereo output Treble, and bass control in 2.0db Steps Volumecontrol in 1.0db steps Two speaker attenuators: - two independentspeakercontrol In 1.0dbsteps for balancefacility - independent mute function All function are programmable via...
  • Page 33 SERVICE MANUAL 4) Pin Connection Fig.19 5) Electrical Characteristics...
  • Page 34 SERVICE MANUAL ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25° C, VS = 9V,RL= 10KΩ, RG = 600Ω, all controls flat (G = 0dB), unless otherwise specified) NOTE1: 1) The device is functionally good at Vs = 5V. a step down, on Vs, to 4V does’ t reset the device. 2) BASS and TREBLE response: The center frequency and the response quality can be chosen b y the external circuitry.
  • Page 35 SERVICE MANUAL 1.7 Power module STR-G5653/6454R Switch-mode Power Supply STR- G5653/F6654 The Series STR-G5653/F6654 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. The series incorporates a high-precise error amplifying control and drive circuit with discrete avalanche -rated power MOSFET, featuring fewer external components, small-size and standard power supply.
  • Page 36 SERVICE MANUAL 3). Pin Configuration and Functions Fig.21 Table 8 Pin function for STR-G5653 Pin No. Symbol Function Description MOSFET drain MOSFET source Ground Supply voltage input for control circuit OCP/FB Over-current protection detection signal/ voltage-limiting signal input Table 9 Pin function for STR-F6654 Pin No.
  • Page 37 SERVICE MANUAL 2. WAVEFORMS OF KEY POINTS NI00 NI00 Pin58 Pin33 NI00 NI00 Pin34 Pin44 NI00 NI00 Pin21 Pin22 BU250 BSC60H 8DX-B -HEAT...
  • Page 38 SERVICE MANUAL BCT-4 N100 Pin4 -P40 Notes: ①　 The waveforms are only for reference. ②　 The waveforms may d iffer dependent on different models.
  • Page 39 SERVICE MANUAL 3. KEY ICS SERVICE DATA Table 10 Function and Service Data of TDA9351PS/N2/3I (N100)’ s Pins Digital Multimeter : Victor DT890D Reference Positive Nerative Symbol Voltage (V) Resistance Resistance (KΩ) (KΩ) P1.3/T1 P1.6/SCL P1.7/SDA P2.0/TPWM 36.2 17.9 P3.0/ADC0/PWM0 11.8 12.3 P3.1/ADC1/PWM1...
  • Page 40 SERVICE MANUAL AUDEXT/QSSO/AMOUT(1) 27.8 21.5 AUDEXT/ 18.7 16.0 QSSO/AMOUT(1) 27.8 21.5 AUDEXT/ 24.0 21.1 QSSO/AMOUT(1) AUDEXT/ 27.5 21.2 GND1 CVBS/Y 27.5 21.2 CHROMA 26.8 20.9 AUDOUT /AMOUT(1) 27.5 21.5 INSSW2 R2/VIN 28.0 21.7 G2/YIN 28.0 21.7 B2/UIN 28.0 21.7 BCLIN 27.6 20.8 BLKIN...
  • Page 41 SERVICE MANUAL Table 1 2 Function and Service Data of TDA8356 (N401)’ s Pins Digital Multimeter : Victor DT890D Reference Positive Nerative Symbol Voltage (V) Resistance Resistance (KΩ) (KΩ) Idrive (pos) 27.7 20.3 Idrive (neg) 27.7 20.4. 15.4 26.3 13.5 VO (B) 45.0 113.3...
  • Page 42 SERVICE MANUAL Table 14 Functions and Service Data of TDA7057AQ (N600)’ s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (20KΩ) Negative Resistance (20KΩ) Volume control input 0.95 6.85 6.15 ∞ ∞ Not connected 0.00 Audio R signal input 2.38 12.59 6.51...

  • Page 43: Replacement Of Parts

    SERVICE MANUAL 4. REPLACEMENT OF PARTS 4.1 Description Many electrical and mechanical components in this chassis have special safety-related characteristics. Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols or UL, FCC, FDA or VDE marking on the circuit diagram and parts list.
  • Page 44 SERVICE MANUAL 4.2 Parts List for 21NF55 Position Name Attribute Type 1. Parts on Main PCB 1) Basic Parts R051 Carbon film resistor RT13-0.166W-10ΩJ R399 Carbon film resistor RT13-0.166W-10ΩJ R136B Carbon film resistor RT13-0.166W-10ΩJ R042 Carbon film resistor RT13-0.166W-47ΩJ R242 Carbon film resistor RT13-0.166W-47ΩJ...
  • Page 45 SERVICE MANUAL Position Name Attribute Type R430 Carbon film resistor RT13-0.166W-1.8KΩJ R621 Carbon film resistor RT13-0.166W-2KΩJ R062 Carbon film resistor RT13-0.166W-2.2KΩJ R065 Carbon film resistor RT13-0.166W-2.2KΩJ R248 Carbon film resistor RT13-0.166W-2.2KΩJ R371 Carbon film resistor RT13-0.166W-2.2KΩJ R138A Carbon film resistor RT13-0.166W-2.2KΩJ R132A Carbon film resistor...
  • Page 46 SERVICE MANUAL Position Name Attribute Type R006 Carbon film resistor RT13-0.166W-100KΩJ R232 Carbon film resistor RT13-0.166W-100KΩJ R395 Carbon film resistor RT13-0.166W-100KΩJ R485 Carbon film resistor RT13-0.166W-120KΩJ R488 Carbon film resistor RT13-0.166W-560KΩJ R242A Carbon film resistor RT14-0.25W-10ΩJ R165 Carbon film resistor RT14-0.25W-100ΩJ R166 Carbon film resistor...
  • Page 47 SERVICE MANUAL Position Name Attribute Type C003 Ceramic capacitor CC1-63V-08a-SL-220PFJ C171A Ceramic capacitor CT1-63V-06a-2B4-330PFK C882 Ceramic capacitor CT1-63V-06a-2B4-470PFK C194 Ceramic capacitor CT1-63V-06a-2B4-560PFK C884 Ceramic capacitor CT1-63V-06a-2B4-820PFK C165 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C166 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C186A Ceramic capacitor CT1-63V-06a-2B4-1000PFK C233 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C401 Ceramic capacitor...
  • Page 48 SERVICE MANUAL Position Name Attribute Type C871 Ceramic capacitor CT81-2KV-10c-2B4-470PFK C881 Ceramic capacitor CT81-2KV-10c-2B4-470PFK C891A Ceramic capacitor CT81-2KV-10c-2B4-470PFK C163 Polyester film capacitor CL21X-50V-0.022µFJ C007 Polyester film capacitor CL21X-50V-0.1µFJ C008 Polyester film capacitor CL21X-50V-0.1µFJ C032 Polyester film capacitor CL21X-50V-0.1µFJ C155 Polyester film capacitor CL21X-50V-0.1µFJ C181 Polyester film capacitor...
  • Page 49 SERVICE MANUAL Position Name Attribute Type C399 Aluminum electrolytic capacitor CD110X-16V-10µFM C051 Aluminum electrolytic capacitor CD110X-16V-47µFM C004 Aluminum electrolytic capacitor CD110X-16V-47µFM C125 Aluminum electrolytic capacitor CD110X-16V-47µFM C242 Aluminum electrolytic capacitor CD110X-16V-47µFM C399A Aluminum electrolytic capacitor CD110X-16V-47µFM C892 Aluminum electrolytic capacitor CD110X-16V-47µFM C318B Aluminum electrolytic capacitor...
  • Page 50 SERVICE MANUAL Position Name Attribute Type L381 Fixed inductor LGB0606-10µHJ L302 Fixed inductor LGB0606-10µHJ W010 Fixed inductor LGB0606-10µHJ L188C Fixed inductor LGB0606-10µHJ L181 Fixed inductor LGB0606-22µHJ L187 Fixed inductor LGB0606-22µHJ L152 Fixed inductor LGB0606-22µHJ L051 Fixed inductor LGB0606-22µHJ L031 Fixed inductor LGB0606-56µHK L350 Fixed inductor...
  • Page 51 SERVICE MANUAL Position Name Attribute Type VD804 Diode BY254 VD804 Diode 1N5408 VD805 Diode BY254 VD805 Diode 1N5408 VD806 Diode BY254 VD806 Diode 1N5408 D524 Diode RM11C D881 Diode AK03 D884 Diode AU01Z D885 Diode AU01Z D888 Diode AU01Z V890 Triode 2SA1015-Y V890...
  • Page 52 SERVICE MANUAL Position Name Attribute Type V888 Triode 2PC1815Y V888 Triode KTC3198-Y V872 Triode BC548C V872 Triode BC547C V501 Triode 2SC2688-L V501 Triode 3DA2688-L V501 Triode 3DA2688 V501 Triode 3DA2688-F V102 Triode PH2369 V047 Triode 2SC388ATM V047 Triode KSC388C-Y V047 Triode 3DG388ATM N200...
  • Page 53 SERVICE MANUAL Position Name Attribute Type F801 Delay fuse RT1-20-2.5A-250V F801 Delay fuse R/S/V/I50TT2.5AL250V(61802.5) F801 Delay fuse 61802.5 2) Parts for Side AV Carbon film resistor RT13-0.166W-75ΩJ Carbon film resistor RT13-0.166W-75ΩJ RAV2 Carbon film resistor RT13-0.166W-75ΩJ RAV2A Carbon film resistor RT13-0.166W-75ΩJ Carbon film resistor RT13-0.166W-10KΩJ...
  • Page 54 SERVICE MANUAL Position Name Attribute Type CBY7A Polyester film capacitor CL21X-50V-5600PFJ CBY7 Polyester film capacitor CL21X-50V-0.15µFJ CBY2 Polyester film capacitor CL21X-50V-0.15µFJ C372 Polyester film capacitor CL21X-50V-0.22µFJ C382 Polyester film capacitor CL21X-50V-0.22µFJ C633 Polyester film capacitor CL21X-50V-0.22µFJ CBY6 Polyester film capacitor CL21X-50V-0.33µFJ CBY3 Polyester film capacitor...
  • Page 55 SERVICE MANUAL Position Name Attribute Type V353 Triode 2SA1015-Y V353 Triode 3CG1015-Y V353 Triode 2PA1015Y V353 Triode KTA1266-Y V351 Triode 3DG1815-Y V351 Triode 2SC1815-Y V351 Triode 2PC1815Y V351 Triode KTC3198-Y V356 Triode 3DG1815-Y V356 Triode 2SC1815-Y V356 Triode 2PC1815Y V356 Triode KTC3198-Y V361...
  • Page 56 SERVICE MANUAL Position Name Attribute Type V260 Triode 3DG1815-Y V260 Triode 2SC1815-Y V260 Triode 2PC1815Y V260 Triode KTC3198-Y V261 Triode 3DG1815-Y V261 Triode 2SC1815-Y V261 Triode 2PC1815Y V261 Triode KTC3198-Y Z260 Ceramic filter LT6.5MH 8) Data Related to CRT a) Mount the following parts when using a Changsha-LG CRT A51QAE320X02.
  • Page 57 SERVICE MANUAL Position Name Attribute Type R411 Metal oxide film resistor RY21-0.5W-2.2ΩJ R412 Metal oxide film resistor RY21-0.5W-2.2ΩJ R518 Metal oxide film resistor RY21-2W-1KΩJ R519 Metal oxide film resistor RY21-3W-5.6KΩJ C504 Ceramic capacitor CT81-2KV-14c-2C1-1200PFK C505 Polypropylene capacitor CBB81-1.6KV-9100PFJ C512 Polypropylene capacitor CBB13-400V-0.36µFJ L506 Horizontal linear inductor...
  • Page 58 SERVICE MANUAL Position Name Attribute Type R482 Carbon film resistor RT13-0.166W-10KΩJ R411 Metal oxide film resistor RY21-0.5W-2.2ΩJ R412 Metal oxide film resistor RY21-0.5W-2.7ΩJ R518 Metal oxide film resistor RY21-2W-1KΩJ R519 Metal oxide film resistor RY21-3W-4.7KΩJ C504 Ceramic capacitor CT81-2KV-12c-2B4-820PFK C505 Polypropylene capacitor CBB81-1.6KV-9100PFJ C512...
  • Page 59 SERVICE MANUAL Position Name Attribute Type RY11 Metal oxide film resistor RY21-2W-15KΩJ RY12 Metal oxide film resistor RY21-2W-15KΩJ RY13 Metal oxide film resistor RY21-2W-15KΩJ RY21 Glass glazed resistor RI40-0.5W-1KΩK RY22 Glass glazed resistor RI40-0.5W-1KΩK RY23 Glass glazed resistor RI40-0.5W-1KΩK CY01 Ceramic capacitor CC1-63V-10a-SL-330PFJ CY02...
  • Page 60 SERVICE MANUAL Position Name Attribute Type VY08 Triode BF422 VY08 Triode 3DG422 VY05 Triode BF423 VY05 Triode 3CG423 VY07 Triode BF423 VY07 Triode 3CG423 VY09 Triode BF423 VY09 Triode 3CG423 SY01 CRT socket (Model: GZS series) GZS10-2-108 SY01 CRT socket (Model: GZS series) GZS10-2-AC2 2) Data Related to CRT a) Mount the following parts...
  • Page 61 SERVICE MANUAL Position Name Attribute Type RK91 Carbon film resistor RT13-0.166W-150ΩJ RK92 Carbon film resistor RT13-0.166W-200ΩJ RK94 Carbon film resistor RT13-0.166W-270ΩJ RK95 Carbon film resistor RT13-0.166W-390ΩJ RK96 Carbon film resistor RT13-0.166W-820ΩJ 5. Parts on Power Switch PCB RP12 Carbon film resistor RT13-0.166W-1KΩJ RP12A Carbon film resistor...
  • Page 62 SERVICE MANUAL 4.3 Parts List for 21PF93 Position Name Attribute Type 1. Parts on Main PCB 1) Basic Parts R051 Carbon film resistor RT13-0.166W-10ΩJ R399 Carbon film resistor RT13-0.166W-10ΩJ R136B Carbon film resistor RT13-0.166W-10ΩJ R042 Carbon film resistor RT13-0.166W-47ΩJ R242 Carbon film resistor RT13-0.166W-47ΩJ R064...
  • Page 63 SERVICE MANUAL R430 Carbon film resistor RT13-0.166W-1.8KΩJ R621 Carbon film resistor RT13-0.166W-2KΩJ R062 Carbon film resistor RT13-0.166W-2.2KΩJ R065 Carbon film resistor RT13-0.166W-2.2KΩJ R248 Carbon film resistor RT13-0.166W-2.2KΩJ R371 Carbon film resistor RT13-0.166W-2.2KΩJ R138A Carbon film resistor RT13-0.166W-2.2KΩJ R132A Carbon film resistor RT13-0.166W-3.3KΩJ R133A Carbon film resistor...
  • Page 64 SERVICE MANUAL R232 Carbon film resistor RT13-0.166W-100KΩJ R395 Carbon film resistor RT13-0.166W-100KΩJ R485 Carbon film resistor RT13-0.166W-120KΩJ R488 Carbon film resistor RT13-0.166W-560KΩJ R242A Carbon film resistor RT14-0.25W-10ΩJ R165 Carbon film resistor RT14-0.25W-100ΩJ R166 Carbon film resistor RT14-0.25W-100ΩJ R892 Carbon film resistor RT14-0.25W-680ΩJ R024 Carbon film resistor...
  • Page 65 SERVICE MANUAL C882 Ceramic capacitor CT1-63V-06a-2B4-470PFK C194 Ceramic capacitor CT1-63V-06a-2B4-560PFK C884 Ceramic capacitor CT1-63V-06a-2B4-820PFK C165 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C166 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C186A Ceramic capacitor CT1-63V-06a-2B4-1000PFK C233 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C401 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C430 Ceramic capacitor CT1-63V-06a-2B4-1000PFK C302A Ceramic capacitor CT1-63V-06a-2B4-1000PFK C188D Ceramic capacitor...
  • Page 66 SERVICE MANUAL C163 Polyester film capacitor CL21X-50V-0.022µFJ C007 Polyester film capacitor CL21X-50V-0.1µFJ C008 Polyester film capacitor CL21X-50V-0.1µFJ C032 Polyester film capacitor CL21X-50V-0.1µFJ C155 Polyester film capacitor CL21X-50V-0.1µFJ C181 Polyester film capacitor CL21X-50V-0.1µFJ C187 Polyester film capacitor CL21X-50V-0.1µFJ C189 Polyester film capacitor CL21X-50V-0.1µFJ C251A Polyester film capacitor...
  • Page 67 SERVICE MANUAL C242 Aluminum electrolytic capacitor CD110X-16V-47µFM C399A Aluminum electrolytic capacitor CD110X-16V-47µFM C892 Aluminum electrolytic capacitor CD110X-16V-47µFM C318B Aluminum electrolytic capacitor CD110X-16V-47µFM C031 Aluminum electrolytic capacitor CD110X-16V-100µFM C031A Aluminum electrolytic capacitor CD110X-16V-100µFM C187A Aluminum electrolytic capacitor CD110X-16V-100µFM C188 Aluminum electrolytic capacitor CD110X-16V-100µFM C217 Aluminum electrolytic capacitor...
  • Page 68 SERVICE MANUAL L187 Fixed inductor LGB0606-22µHJ L152 Fixed inductor LGB0606-22µHJ L051 Fixed inductor LGB0606-22µHJ L031 Fixed inductor LGB0606-56µHK L350 Fixed inductor LGB0606-56µHK L221 Fixed inductor LGA0307-22µHK L881 Feed-through inductor TEM2000 L891 Feed-through inductor TEM2000 L421 Feed-through inductor TEM2011 L422 Feed-through inductor TEM2011 L502 Feed-through inductor...
  • Page 69 SERVICE MANUAL D524 Diode RM11C D881 Diode AK03 D884 Diode AU01Z D885 Diode AU01Z D888 Diode AU01Z V890 Triode 2SA1015-Y V890 Triode 3CG1015-Y V890 Triode 2PA1015Y V890 Triode KTA1266-Y V251 Triode 2SA1015-Y V251 Triode 3CG1015-Y V251 Triode 2PA1015Y V251 Triode KTA1266-Y V241 Triode...
  • Page 70 SERVICE MANUAL V501 Triode 3DA2688-F V102 Triode PH2369 V047 Triode 2SC388ATM V047 Triode KSC388C-Y V047 Triode 3DG388ATM N200 AT24C08 N200 AT24C08A-10PI2.7 N200 M24C08-BN6 N100 CH05T0101/TDA9381PS/N2/2I VD001 µPC574J VD001 CW574CS N441 L7805CV N441 KA7805TU N441 MC7805CT N861 STR-G5653 V502 BU2508DX N600 TDA7057AQ N401 TDA8356/N6...
  • Page 71 SERVICE MANUAL Carbon film resistor RT13-0.166W-10KΩJ Carbon film resistor RT13-0.166W-10KΩJ Aluminum electrolytic capacitor CD110X-16V-10µFM Aluminum electrolytic capacitor CD110X-16V-10µFM CAV2 Aluminum electrolytic capacitor CD110X-16V-10µFM N402 HEF4053BP N402 HCF4053BEY N402 MC14053BCP 3) Parts for S-VIDEO terminal R313 Carbon film resistor RT13-0.166W-75ΩJ R315 Carbon film resistor RT13-0.166W-75ΩJ R301S...
  • Page 72 SERVICE MANUAL C381 Aluminum electrolytic capacitor CD110X-16V-10µFM C303 Aluminum electrolytic capacitor CD110X-16V-10µFM CBY9 Aluminum electrolytic capacitor CD110X-16V-100µFM L303 Fixed inductor LGB0606-10µHJ V381 Triode 3DG1815-Y V381 Triode 2SC1815-Y V381 Triode 2PC1815Y V381 Triode KTC3198-Y N650 TDA7449 XS801 AV terminals AVLP-33-9R1-YUV 5) Parts for DVD COMPONENT IN R305A Carbon film resistor RT13-0.166W-100ΩJ...
  • Page 73 SERVICE MANUAL V356 Triode 2PC1815Y V356 Triode KTC3198-Y V361 Triode 3DG1815-Y V361 Triode 2SC1815-Y V361 Triode 2PC1815Y V361 Triode KTC3198-Y 6) Parts for NTSC-M Decoding R246 Carbon film resistor RT13-0.166W-2KΩJ R247 Carbon film resistor RT13-0.166W-2KΩJ V246 Triode 2SA1015-Y V246 Triode 3CG1015-Y V246 Triode...
  • Page 74 SERVICE MANUAL a) Mount the following parts when using a BMCC pure flat CRT A51LXR195X91J. R481 Carbon film resistor RT13-0.166W-10KΩJ R482 Carbon film resistor RT13-0.166W-8.2KΩJ R411 Metal oxide film resistor RY21-0.5W-1.8ΩJ R412 Metal oxide film resistor RY21-0.5W-2.2ΩJ R518 Metal oxide film resistor RY21-2W-1KΩJ R519 Metal oxide film resistor...
  • Page 75 SERVICE MANUAL T401 Flyback transformer BSC60K(JUB4.799.044) d) Mount the following parts when using a Orion pure flat CRT A51QDK090X011. R481 Carbon film resistor RT13-0.166W-10KΩJ R482 Carbon film resistor RT13-0.166W-10KΩJ R411 Metal oxide film resistor RY21-0.5W-2.2ΩJ R412 Metal oxide film resistor RY21-0.5W-2.2ΩJ R518 Metal oxide film resistor...
  • Page 76 SERVICE MANUAL T804 Switch transformer BCK-24005L(JUB4.726.083) T401 Flyback transformer BSC60K(JUB4.799.044) g) Mount the following parts when using a Huafei pure flat CRT A51ERF135X90. R481 Carbon film resistor RT13-0.166W-10KΩJ R482 Carbon film resistor RT13-0.166W-10KΩJ R411 Metal oxide film resistor RY21-0.5W-1.8ΩJ R412 Metal oxide film resistor RY21-0.5W-2.2ΩJ R518...
  • Page 77 SERVICE MANUAL L506 Horizontal linear inductor HXT49(JU4.756.016) L505 Horizontal amplitude coil HFT-270 T804 Switch transformer BCK-24005L(JUB4.726.083) T401 Flyback transformer BSC60K(JUB4.799.044) 2. Parts on CRT RGB PCB 1) Basic Parts RY05 Carbon film resistor RT13-0.166W-47ΩJ RY06 Carbon film resistor RT13-0.166W-47ΩJ RY08 Carbon film resistor RT13-0.166W-47ΩJ RY04...
  • Page 78 SERVICE MANUAL VDY07 Diode W05Z8.2A VDY07 Diode GDZJ8.2A VY01 Triode 3DG2482 VY01 Triode 2SC2688-L VY01 Triode 3DA2688-L VY01 Triode 3DA2688 VY01 Triode 3DA2688-F VY02 Triode 3DG2482 VY02 Triode 2SC2688-L VY02 Triode 3DA2688-L VY02 Triode 3DA2688 VY02 Triode 3DA2688-F VY03 Triode 3DG2482 VY03 Triode...
  • Page 79 SERVICE MANUAL d) Mount the following parts when using a Orion pure flat CRT A51QDK090X011. RY20 Fuse resistor RF10-2W-3ΩJ RY20 Fuse resistor RF11-2W-3ΩJ e) Mount the following parts when using a Toshiba pure flat CRT A51LVV896X09. RY20 Fuse resistor RF10-2W-4.3ΩJ RY20 Fuse resistor RF11-2W-4.3ΩJ...
  • Page 80 SERVICE MANUAL NP11A HS0038A2 CP11 Aluminum electrolytic capacitor CD110X-16V-47µFM 6. Parts on Power Switch PCB VDP11A Light emitting diode HFBA052MP(7.0) 7. Others Power switch KDC-A04-MU171 Power Cord RVVZ-CH4-2000-ZH1 Electric speaker YD78-B1-10W-8Ω Degaussing coil XC-2118...
  • Page 81 Circuit Diagram for 21NF55/21PF93...
  • Page 82 MAIN PCB FOR 21NF55/21PF93...
  • Page 83 CRT RGB PCB FOR 21NF55/21PF93...

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