JVC DVL720U, DVL522U Before Assembly and Disassembly, Precautions, Assembly and disassembly

Models: DVL522U GR-DVL220U DVL720U DVL520U DVL320U

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SECTION 1

DISASSEMBLY

1.1 BEFORE ASSEMBLY AND DISASSEMBLY

1.1.1 Precautions

1.Be sure to remove the power supply unit prior to mount- ing and soldering of parts.

2.When removing a component part that needs to discon- nect the connector and to remove the screw for remov- ing itself, first disconnect the connecting wire from the connector and then remove the screw beforehand.

3.When connecting and disconnecting the connectors, be careful not to damage the wire.

4.Carefully remove and handle the part to which some spacer or shield is attached for reinforcement or insula- tion.

5.When replacing chip parts (especially IC parts), desolder completely first (to prevent peeling of the pattern).

6.Tighten screws properly during the procedures. Unless specified otherwise, tighten screws at a torque of 0.088Nm(0.9kgfcm).

1.1.2

Assembly and disassembly

 

 

STEP

PART

 

Fig.No.

POINT

NOTE

No.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UPPER CASE

 

Fig. 1-3-1

5(S1a), 4(S1b), 3(S1c),

 

 

1

ASSY

 

 

 

CN1

 

 

(Inc. MONITOR

 

 

 

 

 

/

ASSY / E.VF

 

 

 

 

 

 

 

ASSY)

 

 

 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

2

- - - - - - - - - - - - - - - - -

 

 

DSC BOARD

 

 

(S2), CN2a, CN2b

 

 

ASSY

 

 

 

 

 

 

3

COVER (HINGE)

Fig. 1-3-2

2(S3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1)

(2)

 

(3)

(4)

(5)

(1)Indicate the disassembly steps. When assembling, per- form in the reverse order of these steps. This number corresponds to the number in the disassembly diagram.

(2)Indicates the name of disassembly/assembly parts.

(3)Indicates the number in the disassembly diagram.

(4)Indicates parts and points such as screws, washers, springs which must be removed during disassembly/ assembly.

Symbol

Name, Point

S

Screw

LLock, Pawl, Hook

SD Soldering

(Example)

2 (S1): Remove the two screws (S1) for removing the part 1.

CN1 : Disconnect the connector1.

SD1 : Unsolder at the point SD1.

(5)Precautions on disassembly/assembly.

1.1.3 Destination of connectors

Note: Three kinds of double-arrows in connection tables re- spectively show kinds of connector/wires.

: Wire : Flat wire

: Board to Board connector

[Example]

CONN.

 

CONNECTOR

 

Pin No.

No.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CN1

MAIN

CN101

MONITOR

CN761

40

1.1.4 Disconnection of Connectors (Wires)

Connector

Pull both ends of the connector in the arrow direction, re- move the lock and disconnect the flat wire.

Flat wire

Connector

Fig. 1-1-1 Connector 1

Extend the locks in the direction of the arrow for unlocking and then pull out the wire. After removing the wire, immedi- ately restore the locks to their original positions because the locks are apt to come off the connector.

Flat wire

Connector

Fig. 1-1-2 Connector 2

B-B connector

Pull the board by both the sides in the direction of the ar- row for disconnecting the B-B connector.

Connector

Connector

Fig. 1-1-3 Connector 3

Connector

Fig. 1-1-4 Connector 4

1-1

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JVC DVL720U, DVL522U Before Assembly and Disassembly, Precautions, Assembly and disassembly, Destination of connectors