THOMSON VPH-6400 Service Manual
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THOMSON VPH-6400 Service Manual

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THOMSON
VPH-6400
MODEL
SERVICE MANUAL

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  • Page 1 THOMSON VPH-6400 MODEL SERVICE MANUAL...

  • Page 16: Deck Mechanism Adjustment

    DECK MECHANISM ADJUSTMENT • Tools and Fixfures for Service 1. Cassette Torque meter 2. Alignment tape 3. Torque gauge SRK-VHT-303(Not SVC part) Parts No NTSC: DTN-001 600g.Cm ATG Parts No: D00-D006 PAL:DTN-0002 Parts No:D00-D002 4. Torque gauge adaptor 5. Post height adjusting driver 6.

  • Page 17: Bottom View

    DECK MECHANISM ADJUSTMENT 1.Mechanism Alignment Position Check Purpose:To determine if the Mechanism is in the correct position, when a Tape is ejected. Test Conditions (Mechanism Test Equipment/ Fixture Check Point Condition) • Mechanism and Mode Switch Position • Blank tape •...

  • Page 18: Checking Torque

    DECK MECHANISM ADJUSTMENT 2. Preparation for Adjustment (To set the Cassette without Tape. Cover the Holes of the End Sensors at the both sides of Deck Mechanism to the Loading state the Bracket Side(L) and Bracket Assembly Door to pre- without inserting a Cassette Tape).

  • Page 19: Guide Roller Height Adjustment

    DECK MECHANISM ADJUSTMENT 4.Guide Roller Height Adjustment Purpose: To regulate the Height of the Tape so that the Bottom of the Tape runs along the Tape Guide Line on the Lower Drum. 4-1. Preliminary Adjustment Test Equipment/ Fixture Test Conditions (Mechanism Condition) Adjustment Point •...

  • Page 20: Audio/Control (A/C) Head Adjustment

    DECK MECHANISM ADJUSTMENT 5. Audio/Control (A/C) Head Adjustment Purpose: To insure that the Tape passes accurately over the Audio and Control Tracks in exact Alignment in both the Record and Playback Modes. 5-1. Preliminary Adjustment (Height and Tilt Adjustment) Perform the Preliminary Adjustment, when there is no Audio Output Signal with the Alignment Tape. Test Equipment/ Fixture Test Conditions (Mechanism Condition) Adjustment Point...

  • Page 21: X-Value Adjustment

    DECK MECHANISM ADJUSTMENT 5-2. Confirm that the Tape passes smoothly slowly turn the Tilt Adjustment Screw(C) in the Counterclockwise direction. between the Take-up Guide and Pinch Roller(using a Mirror or the naked eye). After completing Step 5-1.(Preliminary Adjustment), NOTE: check that the Tape passes around the Take-up Guide and Pinch Roller without Folding or Curling at the Top or Check the RF Envelope after adjusting the A/C Head, if Bottom.

  • Page 22: Adjustment After Replacing Drum Assembly (Video Heads)

    DECK MECHANISM ADJUSTMENT 7. Adjustment after Replacing Drum Assembly (Video Heads) Purpose: To correct for shift in the Roller Guide and X value after replacing the Drum. Test Conditions Test Equipment/ Fixture Connection Point Adjustment Points (Mechanism Condition) • CH-1: PB RF Envelope •...

  • Page 23: Deck Mechanism Parts Locations

    DECK MECHANISM PARTS LOCATIONS • Top View Pracedure Fig- Part Fixing Type Starting 1 Drum Assembly 3 Screw 2 Plate Top 2 Hook 3 Holder Assembly CST Chassis Hole 4 Opener Door Chassis Hole 5 Bracket Assembly 3 Hook L/D Motor 2,3,4 6 Gear Assembly Rack F/L 1 Hook, Chassis Hole A-2...

  • Page 24: Deck Mechanism Disassembly

    DECK MECHANISM DISASSEMBLY Stator (S2) (S2) (S3) Drum Motor (S3) Rotor Drum Sub Assembly Drum FPC Carbon Brush (S1) (S1) (S1) Holder FPC Fig. A-1 1. Drum Assembly (Fig. A-1-1) 1) Unplug the Drum FPC Connector. (Fig. B-1) 2) Remove three Screws(S1) on bottom side and separate the Drum assembly.
  • Page 25 DECK MECHANISM DISASSEMBLY (Fig. A-2-1) Plate Top (B') (Fig. A-2-2) Holder Assembly CST (Fig. A-2-6) Arm Assembly F/L (C1) (Fig. A-2-7) Lever Assembly S/W (H8) Brackert Assembly L/D Motor Spring Lever S/W (Fig. A-2-4) (C') (E') Opener Door (Fig. A-2-3) (H6) Chassis Gear Assembly Rack F/L...
  • Page 26 DECK MECHANISM DISASSEMBLY 2. Plate Top (Fig. A-2-1) 2) Unhook three Hooks(H3,H4,H5) on bottom side of the Chassis, lift up the Bracket assembly L/M and disassem- 1) Pull the (B) portion of the Plate Top back in direction of ble the Bracket assembly L/D Motor. arrow and separate the right side of it.
  • Page 27 DECK MECHANISM DISASSEMBLY Arm Assembly Cleaner (Fig. A-3-1) (S4) Base Assembly A/C Head *(Fig. A-3-3) Head F/E (Fig. A-3-2) Chassis Fig. A-3 9. Arm assembly Cleaner (Fig. A-3-1) 11. Base assembly A/C Head (Fig. A-3-3) 1) Breakaway the (A) portion as Fig. A-3-1 from the 1) Remove the Screw(S4) and lift the Base assembly A/C Embossing of the Chassis, turn the Arm assembly Head up.
  • Page 28 DECK MECHANISM DISASSEMBLY Arm Assembly Tension (Fig. A-4-3) (H11) Spring TB Brake Assembly T (Fig. A-4-1) Spring Tension Reel S Reel T (Fig. A-4-4) (Fig. A-4-4) Spring RS Brake Assembly RS (Fig. A-4-2) (H12) (H9) (H10) Base Tension Chassis Fig. A-4 12.
  • Page 29 DECK MECHANISM DISASSEMBLY Opener Lid (Fig. A-5-2) Assembly Pinch (Fig. A-5-3) Base Assembly P4 Lever T/up (H13) (Fig. A-5-1) (Fig. A-5-4) (H13) Arm T/up (Fig. A-5-5) Chassis Fig. A-5 16. Base assembly P4 (Fig. A-5-1) 19. Lever T/up (Fig. A-5-4)/ 1) Breakaway the (A) portion of the Base assembly P4 from Arm T/up (Fig.
  • Page 30 DECK MECHANISM DISASSEMBLY Belt Capstan (Fig. A-6-1) Motor Capstan (Fig. A-6-2) Washer(W1) Clutch Assembly D35 (Fig. A-6-4) (L1) (L1) Brake Assembly Capstan (Fig. A-6-5) Lever F/R (Fig. A-6-3) (L2) Chassis (S5) Fig. A-6 20. Belt Capstan (Fig. A-6-1)/ 22. Clutch assembly D35 (Fig. A-6-4) Motor Capstan (Fig.
  • Page 31 DECK MECHANISM DISASSEMBLY (H14) Gear Cam Hole(B) Gear Cam (Fig. A-7-2) Gear Drive Hole(A) Gear Sector Washer (W2) (Fig. A-7-3) Plate Slider Gear Drive (Fig. A-7-4) (Fig. A-7-1) Lever Tension (Fig. A-7-5) Lever spring (L3) (Fig. A-7-6) Gear Drive Hole(C) Base Loading (H15) (H16)
  • Page 32 DECK MECHANISM DISASSEMBLY Gear assembly P2 Hole Gear assembly P3 Hole Gear Assembly P3 (Fig. A-8-2) Gear sector Hole(A) Lever spring Boss Gear Assembly P2 Plate slider Hole(B) (Fig. A-8-1) Chassis Base Assembly P3 (Fig. A-8-4) Base Assembly P2 (Fig. A-8-3) Fig.
  • Page 33 DECK MECHANISM DISASSEMBLY (S7) Base Tension Base Loading (Fig. A-9-2) Arm Assembly Idler Jog (Fig. A-9-1) (Fig. A-9-3) Chassis Fig. A-9 31. Base Loading (Fig. A-9-1) 33. Arm assembly Idler (Fig. A-9-3) 1) Remove the Screw(S7). 1) Make narrower the two parts, (A) and (B), as Fig. A-9-3. 2) Lift the Base Loading up.

  • Page 34: Maintenance/Inspection Procedure

    MAINTENANCE/INSPECTION PROCEDURE 1 Check before starting repairs The following faults can be remedied by cleaning and oil- ing. Check the needed lubrication and the conditions of cleanliness in the unit. Check with the customer to find out how often the unit is used, and then determine that the unit is ready for inspec- tion and maintenance.

  • Page 35: Required Maintenance

    MAINTENANCE/INSPECTION PROCEDURE 4. Supplies Required for Inspection and 2. Required Maintenance Maintence The recording density of a VCR(VCP) is much higher than that of an audio tape recorder. VCR(VCP) components must (1) Grease : Kanto G-311G (Blue) or equivalent be very precise, at tolerances of 1/1000mm, to ensure com- (2) Isopropyl Alcohol or equivalent patiblity with other VCRs.
  • Page 36 MAINTENANCE/INSPECTION PROCEDURE (2) Periodic greasing 5-2) Greasing Grease specified locations every 5,000 hours. (1) Greasing guidelines Apply grease, with a cleaning patch. Do not use excess 1) Loading Path Inside & Top side 5) Lever Tension Groove grease. It may come into contact with the tape transport 2) Shaft 6) Clutch Assembly D33 Shaft or drive system.
  • Page 37 GEAR , F/R GEAR AY, P2 & P3 BOSS LEVER, F/R BASE, TENSION (G-754, YELLOW) (G-754, YELLOW) CLUTCH (G-754, YELLOW) ARM, TENSION X3000 First issue 02 / 04...

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