JVC AV-21F1P Service Manual
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JVC AV-21F1P Service Manual

JVC AV-21F1P Service Manual

Color television
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JVC AV-21F1P(PH) COLOR TELEVISION SERVICE MANUAL
http://www.manuallib.com/file/2595095
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This Manual: http://www.manuallib.com/file/2595095

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  • Page 1 JVC AV-21F1P(PH) COLOR TELEVISION SERVICE MANUAL http://www.manuallib.com/file/2595095 From ManualLib.com ManualLib.com collects and classifies the global product instrunction manuals to help users access anytime and anywhere, helping users make better use of products. Home: http://www.manuallib.com/ Chinese: http://www.shuomingshuku.com/ This Manual: http://www.manuallib.com/file/2595095...

  • Page 2: Table Of Contents

    AV-21F1P AV-21F1P SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS AV-21F1P (PH) − CONTENTS SPECIFICATIONS ........................... 2 SAFETY PRECAUTIONS ........................ 3 FEATURES ............................4 OPERATING INSTRUCTIONS (APPENDED) ................1-1 SPECIFIC SERVICE INSTRUCTIONS .................... 4 SERVICE ADJUSTMENTS ......................10 STANDARD CIRCUIT DIAGRAM (APPENDED) ................. 2-1 PARTS LIST ...........................

  • Page 3: Specifications

    AV-21F1P SPECIFICATIONS Item Content Dimensions (W × H × D) 619mm × 458mm × 486.5mm Mass 22kg TV RF System CCIR (M) & (N) Color System NTSC / PAL-M / PAL-N TV Receiving Channel and Frequency VHF (VL) Band (02 ~ 06) 54MHz ~ 88MHz...

  • Page 4: Safety Precautions

    AV-21F1P SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many 8. When service is required, observe the original lead dress. Ex- circuits and components specially for safety purposes. For con- tra precaution should be given to assure correct lead dress in tinued protection, no changes should be made to the original the high voltage circuit area.

  • Page 5: Features

    AV-21F1P FEATURES New chassis design enables use of an interactive on-screen control. Wide range voltage for AC power input. With AUDIO / VIDEO INPUT & OUTPUT terminals. MUTING button can reduce the audio level to zero instantly. Functional remote control to operate TV set (for channel select, volume control, power ON/OFF, etc.) from a distance.
  • Page 6 AV-21F1P FRONT CABINET SPEAKER (×2) CRT SOCKET PWB (Within MAIN PWB) DY01 MAIN PWB SPEAKER (×2) REAR COVER (×2) (×6) No. 56033 This Manual: http://www.manuallib.com/file/2595095...

  • Page 7: Replacement Of Memory Ic

    AV-21F1P REPLACEMENT OF MEMORY IC MEMORY IC (5) Receive channel setting Refer to the OPERATING INSTRUCTIONS and set the This TV uses the following memory IC. receive channels (channels preset). Memory IC: IC1704 on MAIN PW Board The memory IC memorizes data for correctly operating the (6) User settings video and deflection circuits.
  • Page 8 AV-21F1P SETTING OF SYSTEM CONSTANT SET Table 1 Setting item Setting contents Setting value VIDEO AUDIO MONO MONO PH. MONO VARI. OUT GAME CINEMA RETURN+ SURROUND USER SETTING VALUES Setting of Function Table 2-1 Setting item Setting value Setting item...
  • Page 9 AV-21F1P SERVICE MENU SETTING ITEMS Table 3 Service menu Setting item Service menu Setting item PICTURE 1. PICTURE 54. H POS. 60 2. BRIGHT 55. H BLK. 60 Do not adjust. 56. V POS. 60 3. COL. PALM 4. COL. PALN 57.

  • Page 10: Replacement Of Chip Component

    AV-21F1P REPLACEMENT OF CHIP COMPONENT CAUTIONS 1. Avoid heating for more than 3 seconds. 2. Do not rub the electrodes and the resist parts of the pattern. 3. When removing a chip part, melt the solder adequately. 4. Do not reuse a chip part after removing it.

  • Page 11: Service Adjustments

    AV-21F1P SERVICE ADJUSTMENTS BEFORE STARTING SERVICE ADJUSTMENT 7. Preparation for adjustment (presetting): 1. There are 2 ways for adjusting this TV: One is with the Unless otherwise specified in the adjustment items, preset the REMOTE CONTROL UNIT and the other is the conventional following functions with the remote control unit.
  • Page 12 AV-21F1P 3. BASIC OPERATION IN SERVICE MENU SERVICE MENU NOTE: In each menu screen, key operation guide will appear at the bottom, which will help your menu operation. SERVICE MENU (1) How to enter SERVICE MENU PICTURE VIDEO STATUS OTHERS...
  • Page 13 AV-21F1P SERVICE MENU AND SUB MENU SCREENS SERVICE MENU (MAIN MENU) SCREEN A SUB MENU: PICTURE SERVICE MENU PICTURE VIDEO STATUS OTHERS LOW LIGHT HIGH LIGHT RF AFC CHK 1. PICTURE VCO (CW) I2C BUS CTRL SELECT EXIT BY SELECT...
  • Page 14 AV-21F1P ADJUSTMENT LOCATIONS MAIN PWB FRONT TIMER POWER MENU REMOCON IC701 RECEIVER F901 IC704 MEMORY S901 POWER SW IC201 T111 TU001 UPPER : FOCUS 1 Pin TP-91(B1) LOWER : SCREEN 2 Pin NC 3 Pin TP-E (") CRT SOCKET PWB...

  • Page 15: Initial Setting Value Of Service Menu

    AV-21F1P INITIAL SETTING VALUE OF SERVICE MENU The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 16 AV-21F1P VIDEO STATUS Initial setting value Setting item Variable range CINEMA GAME ±20 ±0 ±0 TINT ±20 −3 −3 COLOR ±20 −10 −10 PICTURE ±20 ±0 ±0 BRIGHT ±15 ±0 −5 DETAIL −99 ~ +50 −22 ±0 G DRIVE −99 ~ +50 −54...
  • Page 17 AV-21F1P ADJUSTMENTS B1 POWER SUPPLY CHECK Measuring Description Item Test point Adjustment part instrument Check of Signal B1 (TP-91) 1. Receive a black and white signal (color off). (NTSC) B1 POWER Generator TP-E (" " " " " ) 2. Connect a DC voltmeter between B1 (TP-91) and TP-E (") SUPPLY (between pins 1 and 3 of the connector B1).
  • Page 18 AV-21F1P DEFLECTION CIRCUIT ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on page 14. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 19 AV-21F1P VIDEO/CHROMA CIRCUIT ADJUSTMENT The setting (adjustment) using the remote control unit is made on the basis of the initial setting values shown on pages 14 and The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 20 AV-21F1P Measuring Description Item Test point Adjustment part instrument 1. Receive any broadcast. Adjustment Remote 2. BRIGHT 2. Select the sub menu screen PICTURE from the SERVICE control unit MENU. 3. Select 2. BRIGHT with the MENU 1/4 key, and confirm its BRIGHT initial setting value.
  • Page 21 AV-21F1P Measuring Description Item Test point Adjustment part instrument [Method of adjustment using measuring instrument] Adjustment Signal TP-47B of SUB generator TP-E (" " " " " ) COLOR-II [CRT (PAL-M COLOR) Oscillo- SOCKET 3. COL. PALM 1. Receive a PAL-M full field color bar signal (75% white).
  • Page 22 AV-21F1P Measuring Description Item Test point Adjustment part instrument [Method of adjustment using measuring instrument] Adjustment Signal TP-47B 6. TINT generator TP-E (" " " " " ) SUB TINT-II [CRT Oscillo- SOCKET 1. Receive a NTSC 3.58 color bar signal (full field color bar 75% white).
  • Page 23 AV-21F1P X-RAY PROTECTION CHECK Measuring Description Item Test point Adjustment part instrument Check of Pins 1 and 3 Prepare the following resistor. Ω ± X-RAY 17.2k 1% 1/4W PROTEC- [X Connector 1. Turn on the power and receive any signal.
  • Page 24 AV-21F1P PURITY, CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT 1. Demagnetize CRT with the demagnetizer. WEDGE DEFLECTION YOKE 2. Loosen the retainer screw of the deflection yoke. 3. Remove the wedges. (Fig. 1.) 4. Input a green raster signal from the signal generator, and turn the screen to green raster.
  • Page 25 AV-21F1P STATIC CONVERGENCE ADJUSTMENT 1. Input a cross-hatch signal. 2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) to turn them to magenta (red/blue). (FRONT VIEW) 3. Using 6-pole convergence magnets, overlap the magenta (red/ blue) and green lines in the center of the screen to turn them to white.
  • Page 26 AV-21F1P SELF-CHECK FUNCTIONS 1. Outline This model has self-check functions given below. When an abnormality has been detected, the SUB POWER is turned off and the ON TIMER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer.

  • Page 27: Standard Circuit Diagram (Appended)

    AV-21F1P STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS Type 1. SAFETY No indication : Ceramic capacitor : Mylar capacitor The components identified by the ! ! ! ! ! symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety critical : Polypropylene capacitor components only with manufactures recommended parts.

  • Page 28: Circuit Diagrams

    AV-21F1P CONTENTS SEMICONDUCTOR SHAPES ............2-4 BLOCK DIAGRAM ................2-5 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (Including CRT SOCKET PWB) ......... 2-7 PATTERN DIAGRAMS MAIN PWB PATTERN ......................2-11 CRT SOCKET PWB PATTERN ....................2-13 SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW...

  • Page 29: Block Diagram

    AV-21F1P AV-21F1P BLOCK DIAGRAM MAIN PWB SP01 VIF IN Q101 SF101 CF161 Q161 TUNER SIF OUT IF AMP SAW FILTER 4.5MHz FILTER SIF AMP VIF IN IC601 3 EXT OUT 2 SP01 AUDIO AMP RF AGC SIF IN HEADPHONE TV.V...
  • Page 30 AV-21F1P AV-21F1P CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/2) SGA-1047A-H2 (AV-21F1P-PH) No. 56033 No. 56033...
  • Page 31 AV-21F1P AV-21F1P MAIN PWB CIRCUIT DIAGRAM (2/2) (WITHIN MAIN PWB) SGA-1047A-H2 (AV-21F1P-PH) No. 56033 2-10 No. 56033...

  • Page 32: Parts List

    AV-21F1P PARTS LIST CAUTION The parts identified by the ! symbol are important for the safety. Whenever replacing these parts, be sure to use specified ones to secure the safety. The parts not indicated in this Parts List and those which are filled with lines — in the Parts No. columns will not be supplied.

  • Page 33: Exploded View Parts List

    AV-21F1P CONTENTS P.W. BOARDS ..............................28 EXPLODED VIEW PARTS LIST ........................28 EXPLODED VIEW ............................29 PRINTED WIRING BOARD PARTS LIST MAIN PW BOARD ASS'Y ..............................30 PACKING / PACKING PARTS LIST ........................35 REMOTE CONTROL UNIT PARTS LIST ......................35 P.W.

  • Page 34: Exploded View

    AV-21F1P EXPLODED VIEW CRT SOCKET PWB (Within MAIN PWB) DY01 T1522 MAIN PWB No. 56033 This Manual: http://www.manuallib.com/file/2595095...

  • Page 35: Printed Wiring Board Parts List

    AV-21F1P PRINTED WIRING BOARD PARTS LIST ! Symbol No. Part No. Part Name Description Local ! Symbol No. Part No. Part Name Description Local MAIN P.W. BOARD ASS'Y (SGA-1047A-H2) ! Symbol No. Part No. Part Name Description Local ! Symbol No.
  • Page 36 AV-21F1P ! Symbol No. Part No. Part Name Description Local ! Symbol No. Part No. Part Name Description Local RESISTOR RESISTOR R1714 NRSA02J-0R0X CH MG R 0.0Ω 1/10W R1946 NRSA02J-123X CH MG R 12kΩ 1/10W R1715 NRSA02J-472X CH MG R 4.7kΩ...
  • Page 37 AV-21F1P ! Symbol No. Part No. Part Name Description Local ! Symbol No. Part No. Part Name Description Local CAPACITOR CAPACITOR C1342 QETN1HM-335Z E CAP. 3.3µF C1720 NCB21HK-104X CH C CAP. 0.1µF C1354 NDC21HJ-271X CH C CAP. 270pF C1723 NDC21HJ-151X CH C CAP.
  • Page 38 AV-21F1P ! Symbol No. Part No. Part Name Description Local ! Symbol No. Part No. Part Name Description Local DIODE TRANSISTOR D1001 MTZJ33A-T2 ZENER DIODE Q1521 BSN304-T TRANSISTOR D1201 1SS133-T2 SI DIODE Q1522 2SD1878-YD PW TRANSISTOR H.OUT D1202 MTZJ7.5B-T2 ZENER DIODE...
  • Page 39 AV-21F1P ! Symbol No. Part No. Part Name Description Local ! Symbol No. Part No. Part Name Description Local OTHERS S1701 QSW0619-003Z PUSH SWITCH VOL+ S1702 QSW0619-003Z PUSH SWITCH VOL- S1703 QSW0619-003Z PUSH SWITCH S1704 QSW0619-003Z PUSH SWITCH S1705 QSW0619-003Z...

  • Page 40: Packing Parts List

    AV-21F1P PACKING PACKING PARTS LIST ! Ref.No. Part No. Part Name Description Local GG10057-006A PACKING CASE LC10516-005A CUSHION ASSY 4 pcs. in 1 set CP30967-003-H POLY BAG RM-C372-1H REMOCON UNIT CP30966-001-H POLY BAG LCT0808-001A-H INST BOOK CP30902-040(R) POS/SERIAL LABEL REMOTE CONTROL UNIT PARTS LIST (RM-C372-1H) ! Ref.No.

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