JVC GR-DVL220U, DVL720U, DVL522U, DVL320U, DVL520U service manual Safety Check after Servicing

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Safety Check after Servicing

Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compliance with safety standards.

1.Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and exter- nally exposed parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

2.Dielectric strength test

Confirm specified dielectric strength or greater between power cord plug prongs and exposed acces- sible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.

3. Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d’) be- tween soldered terminals, and between terminals and surrounding metallic parts. See table 1 below.

Fig. 8

4. Leakage current test

Confirm specified or lower leakage current between earth ground/power cord plug prongs and

externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and

output terminals, microphone jacks, earphone jacks, etc.).

Measuring Method : (Power ON)

Insert load Z between earth ground/power cord plug prongs and externally exposed accessible

Externally

a b

Z A c

parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and following

table 2.

exposedV accessible part

Fig. 9

5.Grounding (Class 1 model only)

Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in, Video out, Audio in, Audio out or Fixing screw etc.).

Measuring Method:

Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.

Fig. 10

Table 1 Specifications for each region

Table 2 Leakage current specifications for each region

Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

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S40888-01

 

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Contents 973317-5000 973396-1000630851-7855 714229-8011Table of Contents Important Safety Precautions Safety Check after Servicing Before Assembly and Disassembly PrecautionsAssembly and disassembly Destination of connectorsDISASSEMBLY/ASSEMBLY of Cabinet Parts and Board Assembly Disassembly method 19 S 20 S ∗ 0.147N·m 1.5kgf·cmCN 10 b 10 a CN 10 a CoverPlate MechaDisassembly/assembly of monitor assembly for 2.5-type LCD 4 Monitor AssemblyDisassembly/assembly of hinge assembly for 2.5-type LCD Disassembly/assembly of monitor assembly for 3.5-type LCD Disassembly/assembly of hinge assembly for 3.5-type LCD5 E. VF Assembly Disassembly/assembly of E.VF assembly for the B/W VF∗ 0.078 N m 0.8 kgf cm VF Hinge AssyHow to remove CCD board assembly and CCD base assembly How to assemble CCD base assembly and CCD board assemblyReplacement of service repair parts ∗ 0.078 N m 0.8 kgf cmEmergency Display Example in case of the error number E01LCD Service Note MonitorassyOpblockassy WvfassyPreliminary Remarks on Adjustment and Repair Part Name Point RemarksAdjustment Driver Slit washer Installation JigJig Connector cable Service Support SystemDISASSEMBLY/ASSEMBLY of Mechanism Assembly Mechanism assembly/Cassette housing assemblyBack side of the mechanism assembly Explanation of mechanism modeMechanism timing chart REV Play PartsMechanism assembly Slide deck assembly Main deck assemblyFollow chart Configuration Procedures for disassemblyDisassembling procedure table 10c 10dL1b Cassette Housing assembly L1a Disassembly/assembly Cassette housing assemblyL1d L1a L1c Suptu4c Drum assembly W3a W3bL4a P4b P4a L4bBSlide deck assembly AssemblyGuide roller Assembly CMain deck8a Tension lever assembly/ 8b Slide lever assembly 8c Brake control lever assembly8a Tension lever assembly W7Note 7d P7b S7b Note 7c S7a P7a P7c P7d L7b L7a L7d L7c10a W10b 10e W10a 10c W10a 10d10b L10 11c W11 Note11d 11b 11e List of procedures for disassembly KYODO-SH-PCheckup and Adjustment of Mechanism Phase Mechanism Adjustments Locating procedure Play modeLocating tension pole 2b Reel disk TU assembly W2 ⋅1 S2a ⋅2 S2b ⋅1 Tension arm Lever assembly Jig connector cable YTU93082C Jig board CN105 CoverJIG JIG Connector Cable ConnectionPrecaution PrecautionMonitor Required test equipmentSetup

DVL522U, GR-DVL220U, DVL720U, DVL520U, DVL320U specifications

The JVC DVL320U, DVL520U, DVL720U, GR-DVL220U, and DVL522U are part of JVC's renowned line of digital camcorders that emerged in the early 2000s. Each model showcases an impressive blend of innovative features suited for both amateur enthusiasts and semi-professional videographers alike.

The DVL320U is particularly notable for its compact design and user-friendly interface, making it ideal for capturing everyday moments. It features a 680,000-pixel CCD sensor that provides vibrant image quality and accurate color reproduction. Enhanced with 20x optical zoom and a digital zoom of up to 100x, this model allows users to capture distant subjects clearly. Its built-in digital effects and transition features enable creative video production without needing extensive editing skills.

Moving on to the DVL520U, this model builds upon its predecessor with improved resolution and additional recording formats. The DVL520U supports both VHS-C and S-VHS-C formats, enhancing its versatility for different recording needs. The camera offers excellent low-light performance, aided by its Night Alive feature, which amplifies low-light sensor signals, allowing users to record in dim conditions effectively.

The DVL720U stands out due to its superior optical performance with a 24x optical zoom and enhanced image stabilization technology. With this model, users can expect smoother visuals, particularly in dynamic shooting situations. Alongside a larger LCD screen for easier monitoring, the DVL720U incorporates various shooting modes, including a manual focus option and white balance settings to adapt to multiple shooting environments.

The GR-DVL220U caters to those looking for a portable solution without sacrificing quality. With a combination of high-quality video capture and a compact form factor, this camcorder is ideal for travel and outdoor use. It boasts a Quick Rec function for spontaneous shooting, allowing videographers to capture fleeting moments quickly.

Lastly, the DVL522U enhances connectivity and usability, boasting FireWire input to facilitate easy digital transfer to computers for editing. This feature makes it perfect for aspiring content creators who wish to move their footage to digital platforms seamlessly. Its advanced image processing technology also helps reduce noise and enhance clarity for non-stop recording joy.

In summary, the JVC DVL320U, DVL520U, DVL720U, GR-DVL220U, and DVL522U are impressive camcorders boasting innovative features tailored for various videography needs. With advances in optical zoom capabilities, low-light performance, and connectivity options, JVC has established itself as a key player in the digital video industry during this era.