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Panasonic PV-C923 Service Manual

Color television receiver/ video cassette recorder
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ORDER NO.MKE0307105C1
B22
COLOR TELEVISION RECEIVER/ VIDEO CASSETTE RECORDER
PV-C923
ORIGINAL MFR'S VERSION A
1. IMPORTANT SERVICE SAFETY INFORMATION
Operating the receiver outside of its cabinet or with its back removed involves a shock hazard.
Work on these models should only be performed by those who are thoroughly familiar with
precautions necessary when working on high voltage equipment.
Exercise care when servicing this chassis with power applied. Many B plus and high voltage RF
1

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  • Page 1 ORDER NO.MKE0307105C1 COLOR TELEVISION RECEIVER/ VIDEO CASSETTE RECORDER PV-C923 ORIGINAL MFR'S VERSION A 1. IMPORTANT SERVICE SAFETY INFORMATION Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment.
  • Page 2 terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture tube dag and tuner cluster when operating the chassis. These receivers have a "polarized" AC line cord. The AC plug is designed to fit into standard AC outlets in one direction only.

  • Page 3: Tape Removal Method At No Power Supply

    of leakage current should be made at each exposed metal part having a return path to the chassis (antenna, cabinet metal, screw heads, knobs and/or shafts, escutcheon,etc.) in the following manner. Plug the AC line cord directly into a 120V AC receptacle. (Do not use an Isolation Transformer during these checks.) All checks must be repeated with the AC line cord plug connection reversed.
  • Page 4 3. GENERAL SPECIFICATIONS 4. ABOUT LEAD FREE SOLDER (PbF) Distinction of PbF PCB: PCBs (manufactured) using lead free solder will have a PbF stamp or printing on the PCB. (Please refer to figures.) Caution: - Pb free solder has a higher melting point than standard solder; Typically the melting point is 50°F~70°F (30°C~40°C) higher.

  • Page 5: Removal Of Mechanical Parts And P.c. Boards

    not to heat too long. - Pb free solder will tend to splash when heated too high (about 1100°F/ 600°C). - All products with the printed circuit board with PbF stamp or printing must be serviced with lead free solder. When soldering or unsoldering, completely remove all of the solder from the pins or solder area, and be sure to heat the soldering points with the lead free solder until it melts sufficiently.
  • Page 6 BECAUSE IT CONTAINS HIGH VOLTAGE. BEFORE ATTEMPTING TO REMOVE OR REPAIR ANY PCB, UNPLUG THE POWER CORD FROM THE AC SOURCE. 1. Remove the Anode Cap. (Refer to REMOVAL OF ANODE CAP) 2. Disconnect the following connectors: (CP801 and CP850). 3.
  • Page 7 2. Remove the Main PCB Holder. 3. Remove the 2 screws 4. Remove the screw 5. Remove the 2 screws 6. Disconnect the following connectors: (CP502 and CP820). 7. Remove the Main PCB in the direction of arrow. Fig. 1-4 5.1.5.

  • Page 8: Deck Chassis

    5.1.6. DECK CHASSIS (Refer to Fig. 1-6) 1. Remove the 3 screws 2. Disconnect the following connectors: (CP1001, CP1002, CP4001, CP4002 and CP4003). 3. Remove the Deck Chassis and Shield Cover Deck in the direction of arrow. Fig. 1-6 5.1.7. JACK PLATE AND SYSCON PCB (Refer to Fig.

  • Page 9: Removal Of Deck Parts

    5. Remove the Jack Plate in the direction of arrow (B). Fig. 1-7 5.2. REMOVAL OF DECK PARTS 5.2.1. TOP BRACKET (Refer to Fig. 2-1) 1. Extend the 2 supports 2. Slide the 2 supports and remove the Top Bracket. NOTE 1.

  • Page 10: Cassette Side L/R

    Fig. 2-2 5.2.3. CASSETTE SIDE L/R (Refer to Fig. 2-3-A) 1. Remove the Locker Spring. 2. Unlock the 4 supports and then remove the Cassette Side L/R. 3. Unlock the support and then remove the Locker R. Fig. 2-3-A NOTE 1.

  • Page 11: Loading Motor/Worm

    5.2.4. LINK UNIT (Refer to Fig. 2-4) 1. Set the Link Unit to the Eject position. 2. Unlock the support 3. Remove the (A) side of the Link Unit first, then remove the (B) side. Fig. 2-4 5.2.5. LINK LEVER/FLAP LEVER/BOT COVER (Refer to Fig.
  • Page 12 1. Remove the screw 2. Remove the Loading Motor. 3. Remove the Worm. Fig. 2-6-A NOTE 1. In case of the Worm installation, check if the value of the Fig. 2-6-B is correct. 2. In case of the Loading Motor installation, hook the wire on the Cassette Opener as shown Fig.
  • Page 13 Fig. 2-6-D 5.2.7. TENSION ASS'Y (Refer to Fig. 2-7-B) 1. Turn the Pinch Roller Cam clockwise so that the Tension Holder hook is set to the position of Fig. 2-7-A to move the Tension Arm Ass'y. 2. Remove the Tension Spring. 3.

  • Page 14: T Brake Arm/T Brake Band

    section of Fig. 2-7-E. Fig. 2-7-C Fig. 2-7-D Fig. 2-7-E 5.2.8. T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A) 1. Remove the T Brake Spring. 2. Turn the T Brake Arm clockwise and bend the hook section to remove it. 3.

  • Page 15: S Reel/T Reel/Idler Arm Ass'y/Idler Gear

    5.2.9. S REEL/T REEL/IDLER ARM ASS'Y/IDLER GEAR (Refer to Fig. 2-9-A) 1. Remove the S Reel and T Reel. 2. Remove the 2 Polyslider Washers 3. Remove the Idler Arm Ass'y and Idler Gear. NOTE 1. Take care not to damage the gears of the S Reel and T Reel. 2.

  • Page 16: Cassette Opener/Pinch Roller Block/P5 Arm Ass'y

    1. In case of the S Reel and T Reel installation, check if the correct parts are installed. (Refer to Fig. 2-9-B) 2. In case of the Idler Arm Ass'y installation, install correctly as Fig. 2- 9-C. And also set it so that the section "B" of Fig.
  • Page 17 installation, install correctly as Fig. 2-10-B. Fig. 2-10-B 5.2.11. A/C HEAD (Refer to Fig. 2-11-A) 1. Remove the screw 2. Remove the A/C Head Base. 3. Remove the 3 screws 4. Remove the A/C Head and A/C Head Spring. NOTE 1.

  • Page 18: Fe Head (Recorder Only)

    5.2.12. FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12) 1. Remove the screw 2. Remove the FE Head. Fig. 2-12 5.2.13. AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-13) 1. Unlock the support and remove the AHC Ass'y. 2. Disconnect the following connector: (CD2001) 3.

  • Page 19: Capstan Dd Unit

    5.2.14. CAPSTAN DD UNIT (Refer to Fig. 2-14-A) 1. Remove the Capstan Belt. 2. Remove the 3 screws 3. Remove the Capstan DD Unit. Fig. 2-14-A NOTE 1. In case of the Capstan DD Unit installation, apply the silicon bond (TSE3843-W) on the position Fig.

  • Page 20: Main Cam/Pinch Roller Cam/Joint Gear

    5.2.15. MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-15-A) 1. Remove the E-Ring , then remove the Main Cam. 2. Remove the E-Ring , then remove the Pinch Roller Cam and Joint Gear. Fig. 2-15-A NOTE 1. In case of the Pinch Roller Cam and Main Cam installation, install them as the circled section of Fig.

  • Page 21: Clutch Ass'y/Ring Spring/Clutch Lever/Clutch Gear

    NOTE 1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. (Refer to Fig. 2-16-B) Fig. 2-16-B 5.2.17. CLUTCH ASS'Y/RING SPRING/CLUTCH LEVER/CLUTCH GEAR (Refer to Fig. 2-17-A) 1. Remove the Polyslider Washer 2.

  • Page 22: Cassette Guide Post/Inclined Base S/T Unit/P4 Cap

    NOTE 1. In case of the Clutch Ass'y installation, install it with inserting the spring of the Clutch Ass'y into the dent of the Coupling Gear. (Refer to Fig. 2-17-B) Fig. 2-17-B 5.2.18. CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig.

  • Page 23: Removal Of Anode Cap

    NOTE 1. Do not touch the roller of Guide Roller. 2. In case of the P4 Cap installation, install it with parallel for "A" and "B" of Fig. 2-18-B. 3. In case of the Cassette Guide Post installation, install correctly as the circled section of Fig.
  • Page 24 - After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage. - Do not use pliers to loosen or tighten the Anode Cap terminal, this may cause the spring to be damaged.

  • Page 25: Installation

    the other. NOTE Take care not to damage the Rubber Cap. INSTALLATION 1. Clean the spot where the cap was located with a small amount of alcohol. (Refer to Fig. 3-3.) Fig. 3-3 NOTE Confirm that there is no dirt, dust, etc. at the spot where the cap was located. 2.

  • Page 26: Removal And Installation Of Flat Package Ic

    5. Confirm that the Support is securely connected. 6. Put on the Rubber Cap without moving any parts. 5.4. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC REMOVAL 1. Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage.
  • Page 27 3. When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering machine. (Refer Fig. 4-3.) NOTE Some ICs on the PCB are affixed with glue, so be careful not to break or damage the foil of each IC leads or solder lands under the IC when removing it.
  • Page 28 INSTALLATION 1. Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily. (Refer to Fig. 4-5.) Fig. 4-5 2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads.
  • Page 29 Do not absorb the solder to excess. Fig. 4-7 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin-tip Soldering Iron. (Refer to Fig. 4-8.) Fig. 4-8 5. Finally, confirm the soldering status on four sides of the IC using a magnifying glass.

  • Page 30: Preventive Checks And Service Intervals

    The both pressing of main unit key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. 8. PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage.

  • Page 31: Confirmation Of Hours Used

    CONFIRMATION OF HOURS USED POWER ON total hours and PLAY/REC total hours can be checked on the screen. Total hours are displayed in 16 system of notation. NOTE: If you set a factory initialization, the total hours is reset to "0". The confirmation of using hours will not be possible if clock has been set.

  • Page 32: When Replacing Eeprom (Memory) Ic

    2. TAPE RUNNING SYSTEM When cleaning the tape transport system, use the gauze moistened with isopropyl alcohol. 3. CYLINDER Wrap a piece of chamois around your finger. Dip it in isopropyl alcohol. Hold it to the cylinder head softly. Turn the cylinder head counterclockwise to clean it (in the direction of the arrow).
  • Page 33 NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 5 seconds before Power On. No need setting for after INI 29 due to the adjustment value. 1.

  • Page 34: Turn Power On

    required DATA value has been selected. 6. Pressing ENTER will take you back to ADDRESS for further selection if necessary. 7. Repeat steps 3 to 6 until all data has been checked. 8. When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.

  • Page 35: Preparation For Servicing

    11. PREPARATION FOR SERVICING How to use the Servicing Fixture 1. Unplug the connector CP353, CP502, CP820 and CP850, then remove the VCR Block from the set. Be sure to place the parts on a paper so that they have no short- circuit each other.

  • Page 36: Mechanical Adjustments

    12. MECHANICAL ADJUSTMENTS 12.1. CONFIRMATION AND ADJUSTMENT Read the following NOTES before starting work. - Place an object which weighs between 450g~500g on the Cassette Tape to keep it steady when you want to make the tape run without the Cassette Holder. (Do not place an object which weighs over 500g.) 12.1.1.

  • Page 37: Confirmation And Adjustment Of Tension Post Position

    Fig. 1-1-B 12.1.2. CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION 1. Set to the PLAY mode. 2. Adjust the adjusting section for the Tension Arm position so that the Tension Arm top is within the standard line of Main Chassis. 3.

  • Page 38: Confirmation Of Vsr Torque

    12.1.3. CONFIRMATION OF PLAYBACK TORQUE AND BACK TENSION TORQUE DURING PLAYBACK 1. Load a video tape (T-120) recorded in standard speed mode. Set the unit to the PLAY mode. 2. Install the tentelometer as shown in Fig. 1-3. Confirm that the meter indicates 20 ±...

  • Page 39: Confirmation Of Reel Brake Torque

    12.1.5. CONFIRMATION OF REEL BRAKE TORQUE (S Reel Brake) (Refer to Fig. 1-4-B) 1. Once set to the Fast Forward mode then set to the Stop mode. While, unplug the AC cord when the Pinch Roller Block is on the position of Fig.

  • Page 40: Confirmation And Adjustment Of Tape Running Mechanism

    NOTE If the torque is out of the range, replace the following parts. 12.2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM Tape Running Mechanism is adjusted precisely at the factory. Adjustment is not necessary as usual. When you replace the parts of the tape running mechanism because of long term usage or failure, the confirmation and adjust-ment are necessary.

  • Page 41: Confirmation And Adjustment Of Audio/Control Head

    (The envelope waveform will begin to decrease when youpress the Tracking Button). 7. Adjust the PG shifter during playback. (Refer to the ELECTRICAL ADJUSTMENTS) NOTE After adjustment, confirm and adjust A/C head. (Refer to item 2-2) Fig. 2-1-A Fig. 2-1-B 12.2.2.

  • Page 42: Tape Running Adjustment (X Value Adjustment)

    Fig. 2-2-A Fig. 2-2-B Fig. 2-2-C 12.2.3. TAPE RUNNING ADJUSTMENT (X VALUE ADJUSTMENT) 1. Confirm and adjust the height of the Reel Disk. (Refer to item 1-1) 2. Confirm and adjust the position of the Tension Post. (Refer to item 1-2) 3.

  • Page 43: Mechanism Adjustment Parts Location Guide

    seconds to set tracking to center. 8. Set the X Value adjustment driver (JG153) to the Fig. 2-2-B. Adjust X value so that the envelope waveform outputbecomes maximum. Check if the relation between Audio and Envelope waveform becomes (1) or (2) of Fig.

  • Page 44: Electrical Adjustments

    13. ELECTRICAL ADJUSTMENTS 13.1. BEFORE MAKING ELECTRICAL ADJUSTMENTS Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION - Use an isolation transformer when performing any service on this chassis. - Before removing the anode cap, discharge electricity because it contains high voltage.
  • Page 45 Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damagesto the IC and Transistor). Prepare the following measurement tools for electrical adjustments. 1. Oscilloscope 2. Digital Voltmeter 3. Pattern Generator On-Screen Display Adjustment 1. Unplug the AC plug for more than 5 seconds to set the clock to the non-setting state.
  • Page 46 13.2. BASIC ADJUSTMENTS (VCR SECTION) 13.2.1. PG SHIFTER 1. Connect CH-1 on the oscilloscope to TP1002 and CH-2 to TP4201. 2. Playback the alignment tape. (JG001) 3. Press and hold the ATR button on the remote control more than 2 seconds to set tracking to center.

  • Page 47: Constant Voltage

    2. Connect the digital voltmeter between the pin 5 of CP602 and the pin 1 (GND) of CP602. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (02) on the remote control to select "RF AGC". 4.

  • Page 48: White Balance

    4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (01) on the remote control to select "CUT OFF". 5. Adjust the Screen Volume until a dim raster is obtained. 13.2.6. FOCUS 1. Receive the monoscope pattern. 2.

  • Page 49: Sub Color

    "BRIGHTNESS". 4. Press the VOL. UP/DOWN button on the remote control until the screen begin to shine. 5. Receive the black pattern*. (Audio Video Input) 6. Press the INPUT button on the remote control to set to the AV mode. Then perform the above adjustments 2~4. *The Black Pattern means the whole black raster signal.Select the "RASTER"...

  • Page 50: Sub Contrast

    3. Using the remote control, set the brightness, contranst, color and tint to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (15) on the remote control to select "COLOR". 5. Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 scales on the screen of the oscilloscope.

  • Page 51: Vertical Shift

    channel button (05) on the remote control to select "H PHASE". 3. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 13.2.13. VERTICAL SHIFT 1. Receive the monoscope pattern. 2.

  • Page 52: Purity And Convergence Adjustments

    channel button (17) on the remote control to select "SHARPNESS". 2. Check if the step No. of SHARPNESS is "40". 3. Press the INPUT button on the remote control to set to the AV mode. Then perform the above adjustments 1~2. 13.2.17.

  • Page 53: Static Convergence

    8. Adjust the crosshatch pattern to change to white by repeating steps 6 and 7. 13.3.2. PURITY NOTE Adjust after performing adjustments in section 3-1. 1. Receive the green raster pattern from color bar generator. 2. Adjust the pair of purity magnets to center the color on the screen. Adjust the pair of purity magnets so the color at the ends are equally wide.

  • Page 54: Electrical Adjustment Parts Location Guide

    1. Adjust the differences around the screen by moving the deflection yoke upward/downward and right/left. (Refer to Fig. 3-2-a) 2. Insert three wedges between the deflection yoke and CRT funnel to fix the deflection yoke. (Refer to Fig. 3-2-b) Fig. 3-2-a Fig.

  • Page 55: Block Diagrams

    14. BLOCK DIAGRAMS 14.1. TV BLOCK DIAGRAM 14.2. Y/ C/ AUDIO/ HEAD AMP BLOCK DIAGRAM 14.3. MICON/ IN/ OUT BLOCK DIAGRAM 15. PRINTED CIRCUIT BOARDS 15.1. MAIN/ CRT PRINTED CIRCUIT BOARD...

  • Page 56: Schematic Diagrams

    15.2. SYSCON (INSERTED PARTS) PRINTED CIRCUIT BOARD 15.3. SYSCON (CHIP MOUNTED PARTS) PRINTED CIRCUIT BOARD 16. SCHEMATIC DIAGRAMS 16.1. Y/ C/ AUDIO/ HEAD AMP SCHEMATIC DIAGRAM 16.2. MICON SCHEMATIC DIAGRAM 16.3. POWER SCHEMATIC DIAGRAM 16.4. IN/ OUT SCHEMATIC DIAGRAM 16.5. CHROMA/ IF SCHEMATIC DIAGRAM 16.6.

  • Page 58: Chassis Exploded View (Top View)

    18.2. CHASSIS EXPLODED VIEW (TOP VIEW)

  • Page 59: Chassis Exploded View (Bottom View)

    18.3. CHASSIS EXPLODED VIEW (BOTTOM VIEW)

  • Page 60: Mechanical Replacement Parts List

    19. REPLACEMENT PARTS LISTS 19.1. MECHANICAL REPLACEMENT PARTS LIST...
  • Page 61 Ref. No. Part No. Description Remarks PART NO. DESCRIPTION A5B023B720 CABINET, FRONT ASSY 101A 701WPJC204 CABINET, FRONT 101B 711WPA0190 GUIDE, REMOCON 101C 712WPJB775 FLAP 101D 713WPA0280 GLASS, LED 101E 7235760006 BRAND, BADGE 101F 735WPA0757 STOPPER, BUTTON 101G 735WPJA781 BUTTON, FRAME 101H 743WKA0037 SPRING, FLAP...

  • Page 62: Chassis Replacement Parts List

    Ref. No. Part No. Description Remarks 8107630604 SCREW TAP TITE(S) BRAZIER 3x6 8107630804 SCREW TAP TITE(S) BRAZIER 3x8 8141J40B84 SCREW TAP TITE(P) GW15 4x28 8107230604 SCREW, TAP TITE(S) BIND 3x6 725000A055 SHEET, CAR CORD 7250000542 TAG, CAR CORD 791WHA0107 LAMIFILM, BAG 792WHA0458 PACKAGE, TOP 792WHA0459...

  • Page 63: Electrical Replacement Parts List

    Ref. No. Part No. Part Name & Description Remarks 85OP200313 LEVER, CLUTCH 85OP300194 GEAR, MAIN LOADING 85OP400490 LEVER, TENSION 85OP400492 HOLDER, TENSION 85OP400520 CAP.P4 85OP400542 BAND, TENSION 85OP400533 CONNECT, TENSION 85OP600573 ARM, BRAKE T 85OP600584 BAND, BRAKE T 85OP600577 CAM, PINCH ROLLER 85OP600578 CAM, MAIN 85OP600579...
  • Page 64 CAPACITORS CC....CERAMIC CAPACITOR CE....ALUMI ELECTROLYTIC CAPACITOR CP....POLYESTER CAPACITOR CPP....POLYPROPYLENE CAPACITOR CPL....PLASTIC CAPACITOR CMP....METAL POLYESTER CAPACITOR CMPL....METAL PLASTIC CAPACITOR CMPP....METAL POLYPROPYLENE CAPACITOR Ref. No. Part No. Part Name & Description Remarks RESISTORS R301 R002T2560J RC 56 OHM 1/2W R351 R002T4392J RC 3.9K OHM 1/4W R352 R903N8822J RC 8.2K OHM 1/8W...
  • Page 65 Ref. No. Part No. Part Name & Description Remarks R441 R4X5T6104F R, METAL 100K OHM 1/6W R442 R4X5T6123F R, METAL 12K OHM 1/6W R443 R4X5T6183F R, METAL 18K OHM 1/6W R444 R4X5T6272F R, METAL 2.7K OHM 1/6W R447 R65582151J R, FUSE 150 OHM 1/2W R450 R65581100J R, FUSE 10 OHM 1W...
  • Page 66 Ref. No. Part No. Part Name & Description Remarks R547 R3X28B6R8J R, METAL OXIDE 6.8 OHM 3W R548 R002T4220J RC 22 OHM 1/4W R549 R002T4221J RC 220 OHM 1/4W R550 R002T4822J RC 8.2K OHM 1/4W R553 R002T4123J RC 12K OHM 1/4W R554 R002T4273J RC 27K OHM 1/4W...
  • Page 67 R665 R002T4155J RC 1.5M OHM 1/4W...
  • Page 68 Ref. No. Part No. Part Name & Description Remarks R667 R002T4221J RC 220 OHM 1/4W R668 R903N8473J RC 47K OHM 1/8W R669 R002T4221J RC 220 OHM 1/4W R672 R903N8471J RC 470 OHM 1/8W R673 R903N8222J RC 2.2K OHM 1/8W R674 R002T4182J RC 1.8K OHM 1/4W R677...
  • Page 69 Ref. No. Part No. Part Name & Description Remarks R1046 R002T4472J RC 4.7K OHM 1/4W R1047 R903N8472J RC 4.7K OHM 1/8W R1048 R903N8472J RC 4.7K OHM 1/8W R1049 R903N8472J RC 4.7K OHM 1/8W R1050 R903N8101J RC 100 OHM 1/8W R1051 R903N8183J RC 18K OHM 1/8W R1052...
  • Page 70 Ref. No. Part No. Part Name & Description Remarks R4042 R903N8821J RC 820 OHM 1/8W R4043 R903N8332J RC 3.3K OHM 1/8W R4045 R002T4123J RC 12K OHM 1/4W R4047 R903N8123J RC 12K OHM 1/8W R4048 R002T4680J RC 68 OHM 1/4W R4052 R002T4562J RC 5.6K OHM 1/4W R4054...
  • Page 71 Ref. No. Part No. Part Name & Description Remarks C363 E50HU53R3M CE 3.3 UF 50V C364 E50HU53R3M CE 3.3 UF 50V C365 E50HU53R3M CE 3.3 UF 50V C366 E50HU53R3M CE 3.3 UF 50V C367 E00NU2470M CE 47 UF 16 V C368 CS0RF0415Z CC 0.1 UF 50V F...
  • Page 72 Ref. No. Part No. Part Name & Description Remarks C525 C03L0R7Q2K CC 470 PF 2KV R C526 E02LU5470M CE 47 UF 50V C527 E02LT5101M CE 100 UF 50V C529 E5EZT1471M CE 470 UF 10V C530 C0JTB05Q2K CC 470 PF 500V B C531 C0JTB05Q2K CC 470 PF 500V B...
  • Page 73 Ref. No. Part No. Part Name & Description Remarks C649 E50HU5010M CE 1 UF 50V C650 CS0RB04E4K CC 0.015 UF 50V B C653 CS0RF0414Z CC 0.01 UF 50V F C654 CS0KCH4G1J CC 18 PF 50V CH C655 E02LU2470M CE 47 UF 16V C657 CS0RB04H4K CC 0.022 UF 50V B...
  • Page 74 Ref. No. Part No. Part Name & Description Remarks C1039 CS0RCH412J CC 100 PF 50V CH C1040 CS0KCH4G1J CC 18 PF 50V CH C1041 CS0RF0415Z CC 0.1 UF 50V F C1042 CS0RCH412J CC 100 PF 50V CH C1044 CS0RF0414Z CC 0.01 UF 50V F C1045 CS0KCH411D CC 10 PF 50V CH...
  • Page 75 Ref. No. Part No. Part Name & Description Remarks C4034 E50HU54R7M CE 4.7 UF 50V C4035 E50HU5010M CE 1 UF 50V C4036 CS0KB04N2K CC 390 PF 50V B C4037 CS0RF0415Z CC 0.1 UF 50V F C4038 CS0RCH4G2J CC 180 PF 50V CH C4041 CS0RB03H5K CC 0.22 UF 25V B...
  • Page 76 Ref. No. Part No. Part Name & Description Remarks D404 D1VT001330 DIODE, SILICON 1SS133T-77 D405 D1VT001330 DIODE, SILICON 1SS133T-77 D406 D97U03001B DIODE, ZENER MTZJ30B T-77 D407 D97U03001B DIODE, ZENER MTZJ30B T-77 D408 D94TA27011 DIODE, ZENER HZ27-1L TD D409 D94TA11B13 DIODE, ZENER HZ11B3L TD D411 D2WXN49370 DIODE, SILICON 1N4937...
  • Page 77 Ref. No. Part No. Part Name & Description Remarks D545 D2WXB290S0 DIODE, SILICON SB290S D546 D1VT001330 DIODE, SILICON 1SS133T-77 D547 D1VT001330 DIODE, SILICON 1SS133T-77 D548 D1VT001330 DIODE, SILICON 1SS133T-77 D550 D97U05R61B DIODE, ZENER MTZJ5.6B T-77 D551 D97U02R21B DIODE, ZENER MTZJ2.2B T-77 D601 D1VT001330 DIODE, SILICON 1SS133T-77...
  • Page 78 Ref. No. Part No. Part Name & Description Remarks TRANSISTORS Q401 TPATB03003 COMPOUND TRANSISTOR KRA102MAT Q402 TF2002P4M0 THYRISTOR 2P4M Q404 TNATJ03003 COMPOUND TRANSISTOR KRC111MAT Q405 TC5T01627Y TRANSISTOR, SILICON 2SC1627_Y(TPE2) Q406 TD30026270 TRANSISTOR, SILICON 2SD2627LS-CBC11 Q407 TPATB03003 COMPOUND TRANSISTOR KRA102MAT Q408 TCATC31980 TRANSISTOR, SILICON KTC3198-AT(Y, GR) Q501...
  • Page 79 Ref. No. Part No. Part Name & Description Remarks Q4006 TCAT032034 TRANSISTOR, SILICON KTC3203_Y-AT Q4007 T8YJ2412K0 TRANSISTOR, SILICON 2SC2412KT146 R, S Q4009 T6YJ1037K0 TRANSISTOR, SILICON 2SA1037AKT146R, S Q4010 T6YJ1037K0 TRANSISTOR, SILICON 2SA1037AKT146R, S Q4011 T8YJ2412K0 TRANSISTOR, SILICON 2SC2412KT146 R, S Q4012 T8YJ2412K0 TRANSISTOR, SILICON 2SC2412KT146 R, S...
  • Page 80 J4205 060Q401077 RCA JACK AV1-09D-3 Ref. No. Part No. Part Name & Description Remarks SWITCHES SW1001 0508A11002 SWITCH(LEAF) MXS01380MPP0 SW4202 0504101T34 SWITCH, TACT EVQ21505R SW4203 0504101T34 SWITCH, TACT EVQ21505R SW4204 0504101T34 SWITCH, TACT EVQ21505R SW4205 0504101T34 SWITCH, TACT EVQ21505R SW4206 0504101T34 SWITCH, TACT EVQ21505R SW4207...
  • Page 81 Ref. No. Part No. Part Name & Description Remarks CD810 WJL6835038 FLAT CABLE AWM2468 AWG26 11C GRAY 350MM CD850 067U005049 WIRE HOLDER B2013H02-5P CD850 WCL6834038 FLAT CABLE AWM2468 AWG26 5C GRAY 340MM CF601 1022045R72 FILTER, SAW SAFGP45M7VFYZR0B CF603 1011T4R504 FILTER, CERAMIC EFCT4R5YS5A CF604 1011T4R517 FILTER, CERAMIC EFCT4R5MW5...
  • Page 82 C650 R609 C654 C667 C4032 C4055 R4022 C4038 R4012 C662 R4064 R4026 C4015 C670 Q4007 C4019 C4016 R625 R4032 R4068 Q4009 R4029 R4039 R4042 R4210 C4054 Q4010 Q612 R4062 R4041 Q4012 R4033 Q601 C360 PV-C923 SYSCON (CHIP MOUNTED PARTS) P.C.B.
  • Page 83 CD602 R3007 Q1003 TU601 C367 W027 C1020 W118 Q3006 R4224 R4222 W155 W196 W849 W156 W117 W024 R1001 IC3002 W152 Q3001 HS3001 D3005 D1010 W151 S813X CD810 R3002_1 W150 CD603 CP353 R1054 PV-C923 W194 W111 SYSCON (INSERTED PARTS) P.C.B. CD605...
  • Page 84 NOTE:THE DC VOLTAGE EACH PART WAS AUDIO SIGNAL(REC) CAUTION: DIGITAL TRANSISTOR MEASURED WITH THE DIGITAL TESTER DURING PLAYBACK. G.SIGNAL CAUTION PV-C923 :SINCE THESE PARTS MARKED BY ATTENTION :LES PIECES REPAREES PAR UN ETANT CRITICAL FOR SAFETY,USE ONES DANGEREUSES AN POINT DE VUE SECURITE R.SIGNAL...
  • Page 85 R03UPTT/2ST CD504 SI-PC107-67 R.SIGNAL PCB110 G.SIGNAL TCC440 B.SIGNAL PV-C923 CAUTION ATTENTION :SINCE THESE PARTS MARKED BY :LES PIECES REPAREES PAR UN ETANT NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED...
  • Page 86 CAUTION :LES PIECES REPAREES PAR UN ETANT :SINCE THESE PARTS MARKED BY PV-C923 NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME DANGEREUSES AN POINT DE VUE SECURITE CRITICAL FOR SAFETY,USE ONES...
  • Page 87 CAUTION: DIGITAL TRANSISTOR RECORD COLOR SIGNAL NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE:THE DC VOLTAGE EACH PART WAS PV-C923 PLAYBACK LUMINANCE SIGNAL OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE MEASURED WITH THE DIGITAL TESTER IN/OUT SCHEMATIC DIAGRAM DURING PLAYBACK.
  • Page 88 CRITICAL FOR SAFETY,USE ONES CD602 DESCRIBED IN PARTS LIST ONLY L604 CD801_1 SYSCON PCB CD605 NOTE: THIS INTERCONNECTION DIAGRAM IS THE LATEST AT THE TIME PCB010 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE VMC312 CD850 U IN PV-C923 INTERCONNECTION DIAGRAM...
  • Page 89 PCB010 Q1005 VMC312 RPI-303 TUNER VIDEO SIGNAL CAUTION: DIGITAL TRANSISTOR G.SIGNAL PV-C923 CAPSTAN AFC SIGNAL NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE:THE DC VOLTAGE EACH PART WAS R.SIGNAL CYLINDER APC SIGNAL MICON SCHEMATIC DIAGRAM OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE MEASURED WITH THE DIGITAL TESTER DURING PLAYBACK.
  • Page 90 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE CRITICAL FOR SAFETY,USE ONES DANGEREUSES AN POINT DE VUE SECURITE MEASURED WITH THE DIGITAL TESTER PV-C923 DURING PLAYBACK. DESCRIBED IN PARTS LIST ONLY N'UTILISER QUE CELLS DECRITES DANS LA NOMENCLATURE DES PIECES...
  • Page 91 MEASURED WITH THE DIGITAL TESTER OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE DANGEREUSES AN POINT DE VUE SECURITE CRITICAL FOR SAFETY,USE ONES N'UTILISER QUE CELLS DECRITES PV-C923 DURING PLAYBACK. DESCRIBED IN PARTS LIST ONLY DANS LA NOMENCLATURE DES PIECES SOUND AMP SCHEMATIC DIAGRAM...
  • Page 92 POWER_FAIL[DC] VR501 CAUTION: IS THE LIVE CONNECTION 2.2K METAL R519 D517 1SS133 R521 PCB070 330 1/4W D519 1SS133 TMC583 8.2K 1/4W S802X D520 1SS133 R556 3.3K 1/4W D530 1SS133 UNREG+8V PV-C923 TV POWER SCHEMATIC DIAGRAM R555 (MAIN PCB) 82K 1/4W...
  • Page 93 L4007 TMC-T02X-E1 2623003 PCB010 FE HEAD(GND) VMC312 FE HEAD(HOT) PV-C923 CAUTION: DIGITAL TRANSISTOR Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM NOTE:THE DC VOLTAGE EACH PART WAS NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME MEASURED WITH THE DIGITAL TESTER OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE (SYSCON PCB) DURING PLAYBACK.

  • Page 94: Y/ C/ Audio/ Head Amp Schematic Diagram

    16 SCHEMATIC DIAGRAMS 16.1. Y/ C/ AUDIO/ HEAD AMP SCHEMATIC DIAGRAM BUFFER Q4012 2SC2412K R4041 1.8K FROM POWER P.CON+5V COMP OUT C4016 AUDIO C-ROT C-GND C-VCC SERAIL KILL MUTE RF-SW 320FH VX01 HA SW DECODER 0.068 B C4019 CHROMA 0.047 C4015 BEFORE 0.047...
  • Page 95 R4014 AUDIO SIGNAL(REC) 15.6KHZ TRAP L4007 2623003 PCB010 VMC312 PV-C923 Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM GE EACH PART WAS NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME TH THE DIGITAL TESTER OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE (SYSCON PCB) ACK.

  • Page 96: Micon Schematic Diagram

    16.2. MICON SCHEMATIC DIAGRAM FROM POWER D1005 SB140-EIC D1006 SB140-EIC AT+5.6V MOTOR_GND P.CON+5V AT+12V X-RAY_STOP POWER_FAIL[DC] R1015 AT+5V POWER_FAIL POWER FALL Q1006 2SA1037AK W810 0.9 0.9 VCR_A_MUTE TV_A_MUTE EXT_A_MUTE R1001 3.3K 1/4W POWER_FAIL_L IIC_OFF 81 VCR_A_MUTE IIC OFF R1008 CAP_FG 82 TV_A_MUTE CAP-FG C1013 0.0039 B...
  • Page 97 KEY_B REMOCON_IN EXT_MUTE EXT_A_MUTE AT+5V D1010 1SS133 TO SOUND AMP TV_POWER_H TV_A_MUTE R1049 4.7K D1002 1SS133 PCB010 VMC312 TUNER VIDEO SIGNAL TAL TRANSISTOR G.SIGNAL PV-C923 CAPSTAN AFC SIGNAL R.SIGNAL CYLINDER APC SIGNAL MICON SCHEMATIC DIAGRAM B.SIGNAL DEFLECTION SIGNAL (SYSCON PCB)

  • Page 98: Power Schematic Diagram

    16.3. POWER SCHEMATIC DIAGRAM REG. Q3001 2SB1131 AT+13V R3001 POWER.H VCR_POWER_H Q3002 KRC102SRTK FROM CHROMA/IF CD605 CH01429A AT+5.6V AT+12V FROM/TO DEFLECTION MOTOR_GND UNREG+8V CD603 (CP402) AT+13V CH01423A AT+30V UNREG+8V X-RAY_STOP POWER_FAIL[DC] FROM TV POWER 763W CD810 (CP502) B2013H02-11P AT+5.6V AT+12V MOTOR_GND UNREG+8V UNREG+8V...
  • Page 99 HESE PARTS MARKED BY :LES PIECES REPAREES PAR UN ETANT AL FOR SAFETY,USE ONES DANGEREUSES AN POINT DE VUE SECURITE PV-C923 BED IN PARTS LIST ONLY N'UTILISER QUE CELLS DECRITES POWER SCHEMATIC DIAGRAM DANS LA NOMENCLATURE DES PIECES (SYSCON PCB)

  • Page 100: In/ Out Schematic Diagram

    16.4. IN/ OUT SCHEMATIC DIAGRAM C4221 L4201 0.001 B 100uH Vout OS4201 PIC-37242SR-H R4207 R4208 R4210 1.5K R4211 R4214 R4215 R4216 R4217 5.6K 2.7K 1.5K REC LED SW T-REC LED SW TV POWER SW Q4206 Q4205 KRC102SRTK Q4204 KRC102SRTK KRC102SRTK FROM/TO MICON REC_LED T-REC_LED...
  • Page 101 R4204 Q4210 2SA1037AK MTZJ5.6B R4239 220 1/2W R4238 FFER 037AK AUDIO SIGNAL(PB) PCB010 VMC312 AUDIO SIGNAL(REC) RECORD LUMINANCE SIGNAL CAUTION: DIGITAL TRANSISTOR RECORD COLOR SIGNAL PV-C923 PLAYBACK LUMINANCE SIGNAL IN/OUT SCHEMATIC DIAGRAM PLAYBACK COLOR SIGNAL (SYSCON PCB) TUNER VIDEO SIGNAL...

  • Page 102: Chroma/ If Schematic Diagram

    16.5. CHROMA/ IF SCHEMATIC DIAGRAM FROM/TO MICON PROTECT POWER_FAIL OSD_R OSD_G OSD_B C663 OSD_BLK L614 L608 390P CH 100uH 0305 150uH AFT_M TUNER_V VCR_POWER_H R620 CF604 BUFFER X-RAY_TEST Q601 EFCT4R5MW5 TV_POWER_H 2SA1037AK H_CTL IIC_OFF TEST POINT CP602 8283_0712_00_000 INTELLGENT MONI B.OUT B.OUT R608...
  • Page 103 RECORD COLOR SIGNAL VMC312 PLAYBACK LUMINANCE SIGNAL PLAYBACK COLOR SIGNAL DEFLECTION SIGNAL AUDIO SIGNAL(PB) AUDIO SIGNAL(REC) G.SIGNAL PV-C923 ATTENTION :LES PIECES REPAREES PAR UN ETANT DANGEREUSES AN POINT DE VUE SECURITE R.SIGNAL CHROMA/IF SCHEMATIC DIAGRAM N'UTILISER QUE CELLS DECRITES B.SIGNAL...

  • Page 104: Sound Amp Schematic Diagram

    16.6. SOUND AMP SCHEMATIC DIAGRAM FROM MICON W821 TV_A_MUTE TV_POWER_H R359 FROM CHROMA/IF W827 SOUND+B AUDIO_OUT SOUND_GND CD604 CH01429A W832 R353 68K 1/4W C360 0.01 FROM/TO POWER W837 C355 R351 3.9K 1/4W NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME CAUTION NOTE:THE DC VOLTAGE EACH PART WAS :SINCE THESE PARTS MA...
  • Page 105 :LES PIECES REPAREES PAR UN ETANT :SINCE THESE PARTS MARKED BY DANGEREUSES AN POINT DE VUE SECURITE CRITICAL FOR SAFETY,USE ONES PV-C923 N'UTILISER QUE CELLS DECRITES DESCRIBED IN PARTS LIST ONLY DANS LA NOMENCLATURE DES PIECES SOUND AMP SCHEMATIC DIAGRAM...

  • Page 106: Tv Power Schematic Diagram

    16.7. TV POWER SCHEMATIC DIAGRAM +5V_REG IC IC501 KIA7805API DC JACK J503 HEC0824-010010 RY503 ALKS325 D550 MTZJ5.6B D502 HS504 763WSA0017 R549 1SS133 PROTECTOR/AC,DC SW DC POWER SW 220 1/4W D526 Q514 Q501 DTC114ES KTC3198 PROTECTOR DC POWER SW. 1SS133 PROTECTOR Q518 Q511 Q503...
  • Page 107 (CD810) 0.0022 AT+12V 52147-1110 B507 D510 AT+5.6V AT+5.6V W5RH3.5X5X1.0 RU2AM-EIC AT+12V AT+12V MOTOR_GND D545 UNREG+8V UNREG+8V UNREG+8V SB290S 135V AT+13V C532 AT+13V AT+30V 500V 470P X-RAY_STOP X-RAY_STOP POWER_FAIL[DC] POWER_FAIL[DC] PCB070 TMC583 S802X NREG+8V PV-C923 TV POWER SCHEMATIC DIAGRAM (MAIN PCB)

  • Page 108: Deflection Schematic Diagram

    16.8. DEFLECTION SCHEMATIC DIAGRAM V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP UP 26.3 12.5 25.9 R426 R431 5.6K 1/4W 470 1/4W R413 R416 R421 12K 1/4W 10K 1/4W 1.2K 1/2W FROM/TO CHROMA/IF R547 CP820 (CP601) 52147-1210 R430 SOUND+B HS401 27K 1/4W SOUND_GND 763WSA0015 H.OUT...
  • Page 109 220K 1/4W CAUTION: DIGITAL TRANSISTOR PCB070 TMC583 CAUTION: DIGITAL TRANSISTOR CAUTION AR UN ETANT :SINCE THESE PARTS MARKED BY PV-C923 DE VUE SECURITE CRITICAL FOR SAFETY,USE ONES DEFLECTION ECRITES DESCRIBED IN PARTS LIST ONLY E DES PIECES SCHEMATIC DIAGRAM (MAIN PCB)

  • Page 110: Crt Schematic Diagram

    16.9. CRT SCHEMATIC DIAGRAM 132.8 FROM CHROMA/IF TP801 CP850 (CD850) R802 52147-0510 15K 1W RED AMP CUT_OFF Q804 G.OUT 132.5 KTC3207 R807 R.OUT 2.7K 1/2W B.OUT R811 470 1/4W C809 TP802 560P B R805 GREEN AMP 15K 1W Q805 KTC3207 132.1 R808 2.7K 1/2W...
  • Page 111 R03UPTT/2ST CD504 SI-PC107-67 R.SIGNAL G.SIGNAL B.SIGNAL PV-C923 ATEST AT THE TIME NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED GE WITHOUT NOTICE CRT SCHEMATIC DIAGRAM WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.

  • Page 112: Interconnection Diagram

    16.10. INTERCONNECTION DIAGRAM SPEAKER CD351 CP353 SP351 SP_OUT+ 8 OHM SP_OUT- CP820 CD601 SOUND+B SOUND+B CD503 CP503 SOUND_GND SOUND_GND +B(A) H.OUT H.OUT +B(B) V.FEEDBACK V.FEEDBACK V.OUT V.OUT AC100V_50/60Hz CD501_3 H_PLUSE H_PLUSE S501 TV_POWER_H TV_POWER_H BLACK POWER_FAIL POWER_FAIL S502 X-RAY-TEST X-RAY-TEST WHITE VCR_POWER_H VCR_POWER_H...
  • Page 113 :SINCE THESE PARTS MARKED BY CRITICAL FOR SAFETY,USE ONES CD602 DESCRIBED IN PARTS LIST ONLY L604 CD605 NOTE: THIS INTERCONNECTION DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE U IN PV-C923 INTERCONNECTION DIAGRAM...
  • Page 114 CRT Size / Visual Size 9 inch / 222.8mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G / 0.18G Color System NTSC Speaker 1Speaker Position Side Size 3 Inch Impedance Sound Output 10%(Typical) System System Player / Recorder Video System NTSC Hi-Fi STEREO...
  • Page 115 Operating Humidity Less than 80% RH On Screen Menu Display Menu Type Character Timer Rec Set Channel Setup TV/CATV Auto ch Memory Add/Delete Guide ch Set TV Setup V-chip Set On/Off Timer Set Picture Audio Sap On/Off Auto Repeat On/Off On/Off Timer Set System Setup Clock Set...
  • Page 116 G-12 Remote Unit RC-GU Control Glow in Dark Remocon Format KASEIKYO Custom Code 8-00h, 9-00h, 9-01h Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys Keys Keys Power CH Up CH Down Volume Up Volume Down Input Select Play F.Fwd...
  • Page 117 Dew/AHC Caution Sheet AC Plug Adapter Quick Set-up Sheet Battery UM size x pcs UM-4 x 2 pcs OEM Brand Yes(Panasonic) AC Cord AV Cord (2Pin-1Pin) Registration Card Owner Information Card (MATSUSHITA Only) ESP Card 300 ohm to 75 ohm Antenna Adapter...
  • Page 118 G-18 Carton Master Carton Content Material Dimensions W x D x H(mm) Description of Origin Gift Box Material Double/Brown Dimensions W x D x H(mm) 338 x 381 x 386 Design As per Buyer's Description of Origin Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces Height (cm) Container Stuffing(40' container)

  • Page 119: Y/C/Audio/Head Amp

    Y/C/AUDIO/HEAD AMP MICON POWER ON 11 PB 0.5V 20µs/div 1.0V 20µs/div 0.5V 0.5ms/div POWER ON POWER ON 13 PB 100mV 0.1µs/div 0.5V 10ms/div 1.0V 5ms/div TV POWER POWER ON 15 5.0V 20ms/div 1.0V 10µs/div 10mV 20us/div 16 500mV 5µs/div 1.0V 10ms/div 0.5V 1ms/div DEFLECTION 17 0.5V 5ms/div...

  • Page 120: Sound Amp

    10.0V 5ms/div 50.0V 20µs/div IN/OUT 19 2.0V 20µs/div 0.5V 1ms/div 20 200mV 20µs/div 0.5V 20µs/div CHROMA/IF 21 50.0V 20µs/div 200mV 20µs/div SOUND AMP 22 50.0V 20µs/div 200mV 2ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 121 VOL. UP VOL. DOWN CH DOWN J4201 REMOCON-IN Q4206 REAR_A T-REC LED T-REC LED REAR_V AT+5V Q4204 Y/C/AUDIO/ T-REC POWER REC/OTR TV POWER TV-POWER J4202 HEAD AMP D4212 D4213 D4211 Y/C_AUDIO Q4205 CHROMA_V REC LED REC LED PV-C923 MICON/IN/OUT BLOCK DIAGRAM...
  • Page 122 HEAD AMP PROTECTOR/ SWITCHING Q504 AC, DC SW. P.CON+13V PROTECTOR Q3001, Q3002 Q3007 IC506 LTV-817M-VB P.CON+8V AC+B ADJ FEED BACK P.CON+5V VR502 DC+B ADJ Q3005, Q3006 VR501 5V REG P.CON+5V P.CON 5V SW IC IC3002 PV-C923 KIA78R05PI TV BLOCK DIAGRAM...
  • Page 123 BIAS CTL AUDIO PB TUNER_A HEAD CTL+ AUDIO L4007 CTL- Q4006 CONTROL 15.6KHz Y/C_AUDIO AE HEAD(-) BIAS OSC TRAP Y/C_AUDIO AE HEAD(+) FRONT_V REAR_V FRONT_A MICON/IN/OUT Q4003 Q4001, Q4002 REAR-A AUDIO PB SW V.REC_ST_H CTL+ CTL- PV-C923 Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM...
  • Page 124 Audio/Control H.SW Head Switch Automatic Color Control Hertz Audio Erase Integrated Circuit Automatic Frequency Control Intermediate Frequency Automatic Fine Tuning Indicator AFT DET Automatic Fine Tuning Detect Inverter Automatic Gain Control Killer Amplifier Left Antenna Light Emitting Diode A.PB Audio Playback LIMIT AMP Limiter Amplifier Automatic Phase Control...
  • Page 125 SYNC Synchronization SYNC SEP Sync Separator, Separation Transistor TRAC Tracking TRICK PB Trick Playback Test Point UNREG Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display V.PB Video Playback Variable Resistor V.REC Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source V-SYNC...
  • Page 126 F501 FH502 TP803 Q401 R421 Q806 Q805 Q804 CD501 R416 R403 R425 R813 R815 R814 S501 D402 R812 C811 CP801_1 S502 C809 R816 R820 C810 R500 W054 R811 MARKED . REPLACE C805 CP803B RISK OF FIRE CP850 PV-C923 MAIN/CRT P.C.B.

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