/ Please refer to the service manual for Z- Mechanism Chassis. (Order No. VRD9802005C2) 2. The Model No. is indicated on the Schematic Diagram and Circuit Board Diagrams as follows. Model No. Indication Mark NV-HD636EG, NV-HD640EG NV-HD636B, NV-HD640B NV-HD636EC, NV-HD640EC NV-HD640BL NV-HD645EG NV-HD645B NV-HD645EC 2.
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4. It does not need to perform when replacing the System Control IC6001. <CHANNEL MEMORY IC INITIALIZATION> PROCEDURES FIP Display Monitor Screen Press the FF and EJECT keys simultaneously None for 3 seconds. Press the FF and EJECT keys simultaneously None more twice.
Model No. Model Code Option Code 1 Option Code 2 NV-HD636EG NV-HD636B NV-HD636EC NV-HD640EG NV-HD640B NV-HD640EC NV-HD640BL NV-HD645EG NV-HD645B NV-HD645EC Fig. S2 Model Code & Option Code 2.1.2. CHECKING OF MAIN C.B.A. When servicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanism from the frame and turn over.
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2. UPPER CYLINDER DISASSEMBLY A. Remove 2 screws (A). B. Remove the Cylinder Stator Unit. Fig. S5 C. Remove 2 screws (B). D. Remove the Cylinder Rotor Unit. Fig. S6 E. Loose hex screw (C) (1.5mm) and remove the Cylinder Retainer. F.
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Fig. S7 3. UPPER CYLINDER ASSEMBLY A. Install the Cylinder Retainer so that the 2 holes on top of the Cylinder Retainer are at right angles with the Head Amp Shield. B. Tighten the hex screw (C) (1.5mm) while pressing down on top of the Cylinder Retainer.
E. Install the Cylinder Stator Unit so that the rear side of the Cylinder Stator C.B.A. is parallel with the Head Amp Shield. F. Tighten 2 screws (A). G. Confirm the PG SHIFTER ADJUSTMENT with the alignment tape (PAL: VFJ8125H3F/NTSC: VFM8080HQFP) and adjust it if necessary.
2.2. REMOVAL OF CASSETTE TAPE There are 2 ways to remove a cassette tape. 1. Service Information Display Operation A. Press the FF and EJECT keys simultaneosly for 3 seconds and set the Service Mode 7. B. Press STOP key in order to rotate the Loading Motor for unloading operation.
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D. Rotate the Main Cam Gear clockwise until the cassette tape is ejected. 2.3. CAUTION FOR AC MAINS LEAD (NV-HD636B, HD640B/BL, HD645B) 2.4. INTRODUCTION OF VIDEO CLEANING TAPE (Polishing type) < Strong weapon for Video Head cleaning > 1. Purpose / To improve the efficiency of the Video Head cleaning service and shortening cleaning time for repair technicians.
Caution: Please do not apply this Polishing Tape more than 10 seconds/ one cleaning procedure. 3. OPERATING INSTRUCTIONS 4. ADJUSTMENT PROCEDURES 4.1. DISASSEMBLY METHOD 4.1.1. DISASSEMBLY FLOW CHART This flow chart indicates disassembly steps of the cabinet parts and the circuit boards in order to find the necessary items for servicing.
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2. REMOVAL OF THE FRONT PANEL UNIT Unlock 7 Tabs (B) Fig. D3 3. REMOVAL OF THE POWER C.B.A. Disconnect Bridge Connector (C) Unlock 6 Tabs (D) Fig. D4...
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COUTIONS: Please pay an attention to disconnect the connector (P1001-P1103) which connected between Main C.B.A. and Power supply unit as shown below. Fig. D5 As above drawing, disconnect the connector by SCREW DRIVER from the direction (A). / Do not disconnect from direction (B) because it is possibility to damage the parts located by the connector.
5. REMOVAL OF THE MECHANISM UNIT Remove 3 Screws (F) Remove 2 Screws (G) Note: Keep pressing 2 stoppers on Cassette Holder Plate and Press Cassette Holder Plate to the rear. Fig. D7 6. REMOVAL OF THE MAIN C.B.A. Disconnect Bridge Connector (C) Remove Screw (H)
7. SERVICING POSITION Fig. D9 4.2. MECHANICAL ADJUSTMENT PROCEDURES Refer to the Service Manual for Z-Mechanism Chassis. / (Order No. VRD9802005C2) 4.3. ELECTRICAL ADJUSTMENT PROCEDURES 4.3.1. TEST EQUIPMENT The following equipments are required for Electrical Adjustments. 1. Dual-Trace Oscilloscope - Voltage Range: 0.005-5V/div - Frequency Range: DC-35MHz - Probes: 10:1 / 1:1 2.
4. Digital Volt Meter (D.V.M.) 5. Video Sweep Generator 6. Sinewave Generator 7. Video Pattern Generator 8. Monitor TV 9. DC Power Supply 10. VHS Blank Tape 11. VHS Alignment Tape - Parts No.: VFJ8125H3F(PAL) - Parts No.:VFM8080HQFP(NTSC) 4.3.2. VCR SETTING When no indication in the procedure, set each selector as follows.
Fig.E1 Fig.E2 CONDITION: BURST SIGNAL OFF / 75 ohm TERMINATED 4.3.4. PG SHIFTER ADJUSTMENT / (AUTOMATIC) PROCEDURES FIP Display Press the FF and EJECT keys simultaneously for 3 seconds. Press the FF and EJECT keys simultaneously more twice. Press the EJECT key for 3 seconds. Press the CH UP key once.
PROCEDURES FIP Display This adjustment is automatically started. (During the adjustment, the picture will be appeared on the monitor.) When this Adjustment is terminated, the following operation will be activated. Adjustment completed: The tape will be ejected. Adjustment incompleted: "F2*" is indicated on the FIP.Check the Servo/System Control circuit and Cylinder Unit. To release Service Mode, press the FF and EJECT keys simultaneously 6 times until the normal indication on the FIP.
PROCEDURES FIP Display Press the FF and EJECT keys simultaneously for 3 seconds. Press the FF and EJECT keys simultaneously more twice. Press the EJECT key button for 3 seconds. Press the CH UP key 3 times. Insert the Blank Tape. This adjustment is automatically started.
12.1. CHASSIS PARTS LIST Ref. No. Part No. Part Name & Description Remarks 1 (1) VEG1411 CYLINDER UNIT [SUPPLIED FROM MBV] 2 (1) VEH0844 UPPER CYLINDER UNIT [SUPPLIED FROM MBV] 3 (1) VDB1256 CYLINDER RETAINER 4 (1) VEK7236 CYLINDER STATOR UNIT 5 (1) VXP1823 CYLINDER ROTOR UNIT...
VHD1185 SCREW 12.2. CASING PARTS LIST Ref. No. Part No. Part Name & Description Remarks 101 (2) VGM1466 TOP PANEL [SUPPLIED FROM MBV] NV-HD636EG/B/EC NV-HD640EG-K/B-K/BL-K NV-HD640EC-K NV-HD645EG-K 101 (2) VGM1556 TOP PANEL [SUPPLIED FROM MBV] NV-HD640EG/B/EC NV-HD645EG/B/EC 102 (2) VYP7157...
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102 (2) VYP7153 FRONT PANEL UNIT [SUPPLIED FROM MBV] NV-HD645EC 103 (2) VKA0191 [SUPPLIED FROM MBV] 104 (2) VKF3037 BLINDER PANEL [SUPPLIED FROM MBV] NV-HD636EG/B/EC NV-HD640EG-K/B-K/BL-K NV-HD640EC-K NV-HD645EG-K 104 (2) VKF3011 BLINDER PANEL [SUPPLIED FROM MBV] NV-HD640EG/B/EC NV-HD645EG/B/EC 105 (2) VMB2521...
CUSHION (L) [SUPPLIED FROM MBV] 212 (3) VPN5126 CUSHION (R) [SUPPLIED FROM MBV] 215 (3) VPG9789 PACKING CASE [SUPPLIED FROM MBV] NV-HD636EG/B/EC 215 (3) VPG9787 PACKING CASE [SUPPLIED FROM MBV] NV-HD640EG/B/EC 215 (3) VPG9788 PACKING CASE [SUPPLIED FROM MBV] NV-HD640EG-K/B-K/BL-K...
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Part Name & Description Remarks VEP06C80A MAIN C.B.A. [SUPPLIED FROM MBV] (RTL) VEP06D11A MAIN C.B.A [SUPPLIED FROM MBV] (For EURO-1 Version) (RTL) NV-HD636EG NV-HD640EG/EG-K THE FOLLOWING C.B.A.S ARE INCLUDED IN MAIN C.B.A. VEP07801BA VEP07997A VEP07998F VEP07801BA TV DEMODULATOR PACK [SUPPLIED FROM MBV] C.B.A (RTL) INCLUDED IN MAIN C.B.A.
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Ref No. Part No. Part Name & Description Remarks INCLUDED IN MAIN C.B.A. (VEP06C80B). VEP06C80D MAIN C.B.A. [SUPPLIED FROM MBV] (RTL) VEP06D11B MAIN C.B.A. [SUPPLIED FROM MBV] (For EURO-1 Version) (RTL) NV-HD636EC NV-HD640EC/EC-K THE FOLLOWING C.B.A.S ARE INCLUDED IN MAIN C.B.A. VEP07801AY VEP07973B VEP07998F...
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Ref No. Part No. Part Name & Description Remarks (RTL) INCLUDED IN MAIN C.B.A. (VEP06C80C). VEP06C80G MAIN C.B.A. [SUPPLIED FROM MBV] (RTL) VEP06D11D MAIN C.B.A. [SUPPLIED FROM MBV] (For EURO-1 Version) (RTL) NV-HD645EG/EG-K THE FOLLOWING C.B.A.S ARE INCLUDED IN MAIN C.B.A. VEP07801BA VEP07997A VEP07998A...
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(RTL) INCLUDED IN MAIN C.B.A. (VEP06C80J/VEP06D11E). VEP05377A HEAD AMP C.B.A. [SUPPLIED FROM MBV] (RTL) VEP01826M POWER C.B.A. [SUPPLIED FROM MBV] (RTL) NV-HD636EG/B/EC NV-HD640EG/EG-K/B/B-K NV-HD640EC/EC-K/BL-K VEP01826H POWER C.B.A. [SUPPLIED FROM MBV] (RTL) NV-HD645EG/EG-K/B/EC VEP07992A AV FRONT C.B.A. [SUPPLIED FROM MBV] (RTL)
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Part Name & Description Remarks (VEK7236). ------------ CAPSTAN DRIVE C.B.A. C.B.A. IS INCLUDED IN CAPSTAN UNIT (VEK8629). TU7601 ENG47295G1 TUNER [SUPPLIED FROM MBV] NV-HD636EG/EC NV-HD640EG/EG-K/EC/EC-K NV-HD645EG/EG-K/EC INCLUDED IN MAIN C.B.A. (VEP06C80A/D/G/J) TU7601 ENG47294G1 TUNER [SUPPLIED FROM MBV] (For EURO-1 Version) NV-HD636EG/EC...
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