JVC GR-SXM260US Service Manual

SERVICE MANUAL

COMPACT VHS CAMCORDER

YF01620041

GR-SXM161US,GR-SXM256UC, GR-SXM260UC,GR-SXM260US, GR-SXM265UC,GR-SXM265US

GR-SXM161US[M4C623],GR-SXM256UC[M4C622]

GR-SXM260UC/US[M4C623],GR-SXM265UC/US[M4C623]

For disassembling and assembling of MECHANISM ASSEMBLY, refer to the SERVICE MANUAL No.86700 (MECHANISM ASSEMBLY).

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

No.YF016

2004/1

SPECIFICATION (The specifications shown pertain specifically to the model GR-SXM260)

1-2 (No.YF016)

SECTION 1

PRECAUTION

1.1 SAFTY PRECAUTIONS

Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold.However,in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced.

1.1.1 Precautions during Servicing

(1) Locations requiring special cauti on are denoted by labels

and inscriptions on the cabinet, chassis and certain parts of the product.When performing service, be sure to read and comply with these and other cautionary notices appearing in the operation and service manuals.

(2) Parts identified by the symbol and shaded ( ) parts

are critical for safety. Replace only with specified part numbers.

NOTE :

Parts in this category also include those specified to comply with X-ray emission standards for products using cathode ray tubes and those specified for compliance with various regulations regarding spurious radiation emission.

(3) Fuse replacement caution notice.

Caution for continued protection against fire hazard. Replace only with same type and rated fuse(s) as specified.

(4) Use specified internal wiring. Note especially:

• Wires covered with PVC tubing

• Double insulated wires

• High voltage leads

(5) Use specified insulating materials for hazardous live parts.

Note especially:

• Insulation Tape

• PVC tubing

•Spacers

• Insulation sheets for transistors

•Barrier

(6) When replacing AC primary side compon ents (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

emission. Consequently, when servicing these products, replace the cathode ray tubes and other parts with only the specified parts. Under no circumstances attempt to modify these circuits.Unauthorized modification can increase the high voltage value and cause X-ray emission from the cathode ray tube.

(12) Crimp type wire connectorIn such cases as when replacing

the power transformer in sets where the connections between the power cord and power trans former primary lead wires are performed using crimp type connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps.

• Connector part number :E03830-001

• Required tool : Connector crimping tool of the proper type which will not damage insulated parts.

• Replacement procedure

a) Remove the old connector by cutting the wires at a

point close to the connector.Important : Do not reuse a connector (discard it).

cut close to connector

Fig.1-1-3

b) Strip about 15 mm of the insulati on from the ends

of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.

15 mm

Fig.1-1-4

c) Align the lengths of the wires to be connected.

Insert the wires fully into the connector.

Metal sleeve

Fig.1-1-1

(7) Observe that wires do not contact heat producing parts

(heatsinks, oxide metal film resistors, fusible resistors, etc.)

(8) Check that replaced wires do not contact sharp edged or

pointed parts.

(9) When a power cord has been replaced, check that 10-15

kg of force in any direction will not loosen it.

Power cord

Fig.1-1-2 (10) Also check areas surrounding repaired locations. (11) Products using cathode ray tubes (CRTs)In regard to such

products, the cathode ray tubes themselves, the high voltage circuits, and related circuits are specified for compliance with recognized codes pertaining to X-ray

Connector

Fig.1-1-5

d) As sh ow n in Fi g. 1-1-6, use the crimping tool to crimp

the metal sleeve at the center position. Be sure to crimp fully to the complete closure of the tool.

1.2 5

5.5

Crimping tool

Fig.1-1-6

e) Check the four points noted in Fig.1-1-7.

Not easily pulled free

Wire insulation recessed

more than 4 mm

Crimped at approx. cente

of metal sleev

Conductors extended

Fig.1-1-7

(No.YF016)1-3

1.1.2 Safety Check after Servicing

Examine the area surrounding the repaired location for d amage 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 externally 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 accessible parts of the set (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.). See Fig.1-1-11 below.

(3) Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See Fig.1-1-11 below.

Chassis

Power cord primary wire

Fig.1-1-8

(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 parts. Use an AC voltmeter to measure across both terminals of load Z. See Fig.1-1-9 and following Fig.1-1-12.

Externally exposed accessible part

Z V

Fig.1-1-9

(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 Fig.1-1-10 and grounding specifications.

AC inlet

Earth pin

Exposed accessible part

MIlli ohm meter

Grounding Specifications

Region USA & Canada Europe & Australia

Grounding Impedance (Z

Z 0.1 ohm Z 0.5 ohm

)

Fig.1-1-10

AC Line Voltage

100 V 100 to 240 V 110 to 130 V

110 to 130 V 200 to 240 V

Region

Japan USA & Canada

Europe & Australia

Insulation Resistance (R

R 1 M /500 V DC

1 M R 12 M /500 V DC

R 10 M /500 V DC

)

Dielectric Strength

AC 1 kV 1 minute AC 1.5 kV 1 minute AC 1 kV 1 minute

AC 3 kV 1 minute AC 1.5 kV 1 minute

(

Class

(

Class

Clearance Distance (d), (d'

d, d' 3 mm d, d' 4 mm d, d' 3.2 mm

d 4 mm

)

d' 8 mm (Power cord d' 6 mm (Primary wire

)

Fig.1-1-11

AC Line Voltage

100 V

110 to 130 V

220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

0.15

1.5

Leakage Current (i)

i 1 mA rms

i 0.5 mA rms i 0.7 mA peak

i 2 mA dc i 0.7 mA peak

i 2 mA dc

a, b, c

Exposed accessible parts

Antenna earth terminals

Other terminals

Fig.1-1-12

NOTE :

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

)

1-4 (No.YF016)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 DIFFERENCE LIST The following table indicate main different points between models GR-SXM161US, GR-SXM256UC, GR-SXM260UC,

GR-SXM260US, GR-SXM265UC and GR-SXM265US.

MODEL GR-SXM161US GR-SXM256UC GR-SXM260UC GR-SXM260US GR-SXM265UC GR-SXM265US

DC LIGHT YES NO YES YES YES YES BODY COLOR BLUE SILVER SILVER SILVER BLUE BLUE CASSETTE ADAPTER NO C-P7U C-P7U C-P7U C-P7U C-P7U SECURITY TAG NO NO NO YES NO NO

(No.YF016)1-5

SECTION 3

DISASSEMBLY

3.1 BEFORE ASSEMBLY AND DISASSEMBLY

3.1.1 Precautions

• Be sure to disconnect the power supply unit prior to mounting and soldering of parts.

• Prior to removing a component part that needs to disconnect its connector(s) and its screw(s), first disconnect the wire(s) from the connector(s), and then remove the screw(s).

• When connecting/disconnecting wires, pay enough attention not to damage the connectors.

• When inserting the flat wire to the connector, pay attention to the direction of the flat wire.

• Be careful in removing the parts to which some spacer or shield is attached for reinforcement or insulation.

• When replacing chip parts (especially IC parts), first remove the solder completely to prevent peeling of the pattern.

• Tighten screws properly during the procedures. Unless specified otherwise, tighten screws at a torque of 0.196N

·cm). However, 0.196N·m (2.0kgf·cm) is a value at the

(2.0kgf time of production. At the time of service, perform the procedure at a torque 10% less than 0.196N

·m (2.0kgf·cm).

(See "SERVICE NOTE" as for tightening torque.)

3.1.2 Destination of connectors

Two kinds of double-arrows in connection tables respectively

show kinds of connector/wires.

: Wire: Flat wire : Board to board (B-B)

: The connector of the side to remove

CONN. No. PIN No.CONNECTOR

CN2a

CN2b

MAIN CN101

MAIN CN103

MONI/ BW CN761

MIC CN762

3.1.3 Disconnection of connectors (Wires)

Wire

· Pull both ends of the connector in the arrow direction, remove the lock and disconnect the flat wire.

B-B Connector

· Pull the both ends of the board in the direction of the arrow, and remove the B-B Connector.

FPC Connector

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

Wire

FPC Connector

Lock

B-B Connector

Fig.3-1-1

3.1.4 Tools required for disassembly and assembly

Torque driver

YTU94088

Chip IC replacement jig

PTS40844-2

Bit

YTU94088-003

Cleaning cloth

KSMM-01

Tweezers

P-895

·m

• Torque driver

Be sure to use to fastening the mechanism and exterior parts because those parts must strictly be controlled for tightening torque.

• Bit

This bit is slightly longer than those set in conventional torque drivers.

• Tweezers

To be used for removing and installing parts and wires.

• Chip IC replacement jig

To be used for replacement of IC.

• Cleaning cloth

Recommended cleaning cloth to wipe down the video heads, mechanism (tape transport system), optical lens surface.

3.2 ASSEMBLY AND DISASSEMBLY OF MAIN PARTS

3.2.1 Assembly and disassembly

When reassembling, perform the step(s) in reverse order.

STEP

No.

[1] [2]

[8]

PART

TOP COVER ASSY UPPER ASSY (Inc. VF ASSY, SPEAKER/MONITOR) VF ASSY

(∗1) Order of steps in Procedure

When reassembling, preform th e step(s) in the reverseorder. These numbers are also used as the identification (location)

No. of parts Figures. (∗2) Part to be removed or installed. (∗3) Fig. No. showing Procedure or Part Location.

C = CABINET

(∗4) Identification of part to be removed, unhooked, unlocked,

released, unplugged, unclamped or unsoldered.

S = Screw L = Lock, Release, Hook SD = Solder CN = Connector

[Example]

• 4 (S1a) = Remove 4 S1a screws.

• 3 (L1a) = Disengage 3 L1a hooks.

• 2 (SD1a) = Unsolder 2 SD1a points.

• CN1a = Remove a CN1a connector.

(∗5) Adjustment information for installation.

Fig. No.

Fig.C1 Fig.C2-1

Fig.C2-2

POINT

S1,2(L1) S2a,2(S2b),3(S2c) 2(S2d),S2e,S2c L2,CN2a,b 2(S8),L8,CN8a

( 4) ( 5)( 2) ( 3)( 1)

NOTE

NOTE 8a NOTE 8b

1-6 (No.YF016)

Fig.3-1-2

3.2.2 ASSEMBLY/DISASSEMBLY OF CABINET PARTS AND ELECTRICAL PARTS zDisassembly procedure

STEP

PART NAME

No.

[1]

LOWER CASE ASSEMBLY

[2]

B/W VF ASSEMBLY

[3]

TOP OPE UNIT(S) TOP OPE UNIT(M)

[4]

CASE COVER(S) ASSEMBLY CASE COVER(M) ASSEMBLY

[5]

UPPER CASE(S) ASSEMBLY UPPER CASE(M) ASSEMBLY Inc. MONITOR ASSEMBLY

[6]

COVER (UPPER/M) ASSEMBLY

[7]

MONITOR ASSEMBLY

[8]

FRONT COVER ASSEMBLY Inc. DC LIGHT,MIC

[9]

DC LIGHT ASSEMBLY

[10]

MIC

[11]

FRONT FRAME SA

Fig.C1

Fig.C2

Fig.C3

Fig.C4

Fig.C5

Fig. No.

8(S1),CN1a,b,c 3(S2) CN3,(S3),(L3a),(L3b),2(L3d) CN3,(S3),(L3a),(L3b),(L3c),2(L3d) (S4),2(L4)

6(S5a),(S5b),(L5) CN5,6(S5a),(S5b)

3(S6) S7a,L7,SHEET(FPC),2(S7b) CN8a,CN8b,(S8),L8a,L8b

2(L9) S10 2(S11)

POINT NOTE

NOTE 5

NOTE 7a,b,c,d

NOTE 8a,b

zDestination of connectors

CN.NO.

CN1a MAIN CN27 SPEAKER - 2

CN1b MAIN CN13 ZOOM UNIT - 14

CN1c MAIN CN12 B/W VF ASSEMBLY - 3

CN3 MAIN CN18 TOP OPE UNIT - 13

CN5 MAIN CN16

CN8a MAIN CN6 DC LIGHT - 2

CN8b MAIN CN8 MIC - 2

NOTE 5 :

Take care not to break or damage the FRAME.

NOTE 7a :

Take care not to cut the FPC wire.

NOTE 7b :

Insert and attach the SHEET(FPC) between the MONITOR FPC and the UPPER CASE(M)ASSEMBLY.

NOTE 7c :

Attachment of the FPC

NOTE 7d :

For disassembly of the MONITOR ASSEMBLY, refer to 2.4 ASSEMBLY AND DISASSEMBLY OF [7]MONITOR ASSEMBLY (CABINET PARTS).

NOTE 8a :

Take care not to damage the OP BLOCK ASSEMBLY when and after the FRONT CASE ASSEMBLY is removed.

NOTE 8b :

Attachment of the WIRE

CONNECTOR

MONITOR ASSEMBLY

CN7601

PIN NO.

(No.YF016)1-7

[3]

L3c

L3b

L3d

CN1c

CN1b

CN1a

10 (S2

11 (S2

L3a

9 (S2

)

OP BLOCK ASSEMBLY

CN3

(S3)

(S1)

[1]

(S1)

)

(S1)

[2]

Fig.C1

[4]

(S4)

[4]

1-8 (No.YF016)

Fig.C2

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