JVC GR-DF420EK, GR-DF420EX, GR-DF420EY, GR-DF420EZ, GR-DF425EG Service Manual

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SERVICE MANUAL

DIGITAL VIDEO CAMERA

GR-DF420EK, GR-DF420EX,

GR-DF420EY, GR-DF420EZ,

GR-DF425EK, GR-DF425EG,

GR-DF430EK, GR-DF460EK,

GR-DF470EK, GR-DF470EX,

GR-DF470EY, GR-DF470EZ

GR-DF420EKM, GR-DF420EXM, GR-DF420EYM, GR-DF420EZM,

GR-DF425EKM, GR-DF425EGM[M5D5S2] ,

GR-DF430EKM[M5D5S3],GR-DF460EKM[M5D5S6],

GR-DF470EKM, GR-DF470EXM GR-DF470EYM, GR-DF470EZM[M5D5S7]

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

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

No.YF087

2005/3

			SPECIFICATION
Camcorder

For General	Power supply			DC 11.0 V(Using AC Adapter)
				DC 7.2 V (Using battery pack)
	Power consumption			Approx. 3.2 W(3.5W*)(LCD monitor off, viewfinder on)
				Approx. 4.2W (4.5W*)(LCD monitor on, viewfinder off)
				* Using LED Light (LED Light model only)
	Dimensions (W × H ×		D)	75 mm × 74mm × 111 mm
				(with the LCD monitor closed and the viewfinder pushed back in)
	Weight			Approx. 400g (without battery, cassette, memory card * and lens cap)
				Approx. 480 g (incl. battery, cassette memory card *and lens cap)
				* GR-DF430,460,470 only
	Operating temperature			0°C to 40°C
	Operating humidity			35% to 80%
	Storage temperature			-20°C to 50°C
	Pickup			1/6" CCD
	Lens			F 1.2, f = 2.6 mm to 39 mm, 15:1 power zoom lens
	Filter diameter			Ø30.5 mm
	LCD monitor			2.5" diagonally measured, LCD panel/TFT active matrix system
	Viewfinder			Electronic viewfinder with 0.16" color LCD
	Speaker			Monaural
	LED Light			Effective distance: 1.5 m
For Digital Video	Format			DV format (SD mode)
Camera	Signal format			PAL standard
	Recording/Playback		Video	Digital component recording
	format		Audio	PCM digital recording, 32 kHz 4-channel (12-bit), 48 kHz 2-channel (16-bit)
	Cassette			Mini DV cassette
	Tape speed			SP: 18.8 mm/s, LP: 12.5 mm/s
	Maximum recording time			SP: 80 min., LP: 120 min.
	(using 80 min. cassette)
For Digital Still	Storage media			SD Memory Card/MultiMediaCard
Camera	Compression system			JPEG (compatible)
(GR-DF460,470
(GR-DF460,470	File size			Still image : 2 modes ( 1024 ×			768 pixels/640 × 480 pixels)
only)				Moving image:1 mode (160 ×			120 pixels)
	Picture quality			2 modes (FINE/STANDARD)
For Connectors	S		S-Video input	Y: 0.8 V to 1.2 V (p-p), 75Ω		, analogue
			(GR-DF430,470 only)	C: 0.2 V to 0.4 V (p-p), 75Ω		, analogue
			S-Video output	Y: 1.0 V (p-p), 75Ω , analogue
				C: 0.29 V (p-p), 75Ω	, analogue
	AV		Video input	0.8 V to 1.2 V (p-p), 75Ω , analogue
			(GR-DF430,470 only)
			Video output	1.0 V (p-p), 75Ω , analogue
			Audio input	300 mV (rms), 50 kΩ	, analogue, stereo
			(GR-DF430,470 only)
			Audio output	300 mV (rms), 1 kΩ , analogue, stereo
	Microphone		input	Ø3.5 mm, stereo
	DV		Input*/output	4-pin, IEEE 1394 compliant
			* GR-DF430,460,
			470 only
	USB(GR-DF460,470	only)		Mini USB-B type, USB 1.1/2.0 compliant
AC Adapter

Power requirement			AC 110 V to 240 V, 50 Hz/60 Hz
Output			DC 11 V, 1 A

Specifications shown are for SP mode unless otherwise indicated. E & O.E. Design and specifications subject to change without notice.

1-2 (No.YF087)

SECTION 1

PRECAUTIONS

1.1SAFTY 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 caution 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 components (transformers, power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

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

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 insulation 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

Connector

Fig.1-1-5

d)As shown in Fig.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.

25	Crimping tool
1.
2.
0

5.5

Fig.1-1-6

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

	Not easily pulled free	Crimped at approx. center
	Not easily pulled free	of metal sleeve
		of metal sleeve
		Conductors extended

Wire insulation recessed more than 4 mm

Fig.1-1-7

(No.YF087)1-3

1.1.2 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 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.

		a	b
Externally	Z	A	c
	Z	A

exposed	V
accessible part

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

Exposed accessible part

Earth pin

MIlli ohm meter
Grounding Specifications
Region	Grounding Impedance (Z)

USA & Canada	Z	0.1 ohm

Europe & Australia	Z	0.5 ohm

Fig.1-1-10

AC Line Voltage

Region

( )

Dielectric Strength

Clearance Distance (d), (d')

Insulation Resistance R

100 V

Japan

1 M /500 V DC

AC 1 kV 1 minute

d, d'

3 mm

100 to 240 V

AC 1.5 kV 1 minute

d, d'

4 mm

110 to 130 V

USA & Canada

1 M

12 M /500 V DC

AC 1 kV 1 minute

d, d'

3.2 mm

110 to 130 V

AC 3 kV 1 minute

4 mm

Europe & Australia

10 M /500 V DC

(Class

)

8 mm

(Power cord)

200 to 240 V

AC 1.5 kV 1 minute

6 mm (Primary wire)

(Class

)

Fig.1-1-11

AC Line Voltage

Region

Load Z

Leakage Current (i)

a, b, c

100 V

Japan

1 mA rms

Exposed accessible parts

110 to 130 V

USA & Canada

0.15

0.5 mA rms

Exposed accessible parts

1.5

110 to 130 V

0.7 mA peak

Antenna earth terminals

Europe & Australia

2 mA dc

220 to 240 V

0.7 mA peak

Other terminals

2 mA dc

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.YF087)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1DIFFERENCE LIST

The following table indicate main different points between models GR-DF420EK, GR-DF420EX, GR-DF420EY, GR-DF420EZ, GR-DF425EK, GR-DF425EG, GR-DF430EK,GR-DF460EK, GR-DF470EK, GR-DF470EX, GR-DF470EY AND GR-DF470EZ.

MODEL NAME	GR-DF420EK	GR-DF420EX	GR-DF420EY	GR-DF420EZ

LED LIGHT	NO	NO	NO	NO

MEMORY CARD	NO	NO	NO	NO

USB TERMINAL	NO	NO	NO	NO

DV TERMINAL	YES(OUT)	YES(OUT)	YES(OUT)	YES(OUT)

ANALOG INPUT	NO	NO	NO	NO

REMOTE CONTROL	RM-V720US	RM-V720US	RM-V720US	RM-V720US

VIDEO/MEMORY	NO	NO	NO	NO

AC ADAPTER	AP-V14E	AP-V17E	AP-V17E	AP-V17E

AC CORD	YES(BS Plug)	NO	NO	NO

USB CABLE	NO	NO	NO	NO

CD-ROM	NO	NO	NO	NO

MODEL NAME	GR-DF425EK	GR-DF425EG	GR-DF430EK	GR-DF460EK

LED LIGHT	NO	NO	NO	YES

MEMORY CARD	NO	NO	NO	MMC(8MB)

USB TERMINAL	NO	NO	NO	USB(VC)

DV TERMINAL	YES(OUT)	YES(OUT)	YES(IN/OUT)	YES(OUT)

ANALOG INPUT	NO	NO	YES	NO

REMOTE CONTROL	NO	RM-V720US	RM-V720US	RM-V720US

VIDEO/MEMORY	NO	NO	NO	YES

AC ADAPTER	AP-V14E	AP-V17E	AP-V14E	AP-V14E

AC CORD	YES(BS Plug)	NO	YES(BS Plug)	YES(BS Plug)

USB CABLE	NO	NO	NO	YES

CD-ROM	YES	NO	YES	YES

MODEL NAME	GR-DF470EK	GR-DF470EX	GR-DF470EY	GR-DF470EZ

LED LIGHT	YES	YES	YES	YES

MEMORY CARD	MMC(8MB)	MMC(8MB)	MMC(8MB)	MMC(8MB)

USB TERMINAL	USB(VC)	USB(VC)	USB(VC)	USB(VC)

DV TERMINAL	YES(IN/OUT)	YES(IN/OUT)	YES(IN/OUT)	YES(IN/OUT)

ANALOG INPUT	YES	YES	YES	YES

REMOTE CONTROL	RM-V720US	RM-V720US	RM-V720US	RM-V720US

VIDEO/MEMORY	YES	YES	YES	YES

AC ADAPTER	AP-V14E	AP-V17E	AP-V17E	AP-V17E

AC CORD	YES(BS Plug)	NO	NO	NO

USB CABLE	YES	YES	YES	YES

CD-ROM	YES	YES	YES	YES

(No.YF087)1-5

JVC GR-DF420EK, GR-DF420EX, GR-DF420EY, GR-DF420EZ, GR-DF425EG Service Manual

SECTION 3

DISASSEMBLY

3.1BEFORE 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 otherwise specified, tighten screws at a torque of 0.069N·m (0.7kgf·cm). However, as this is a required value at the time of production, use the value as a measuring stick when proceeding repair services. (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.

: Flat wire		: Wire	: Board to board (B-B)
: The connector of the side to remove
CONN. No.		CONNECTOR			PIN No.
CN2a	MAIN	CN101	MONI BW	CN761	40
CN2b	MAIN	CN103	MINI BW	CN762	10
3.1.3 Disconnection of connectors (Wires)
	Wire		Wire
	Wire
	FPC Connector			Lock
	FPC Connector		FPC Connector
			FPC Connector

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

Wire

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

Lock

FPC Connector

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

B-B Connector

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

Fig.3-1-1

1-6 (No.YF087)

3.1.4 Tools required for disassembly and assembly

Torque driver	Bit	Tweezers
YTU94088	YTU94088-003	P-895
Chip IC replacement jig	Cleaning cloth
PTS40844-2	KSMM-01
	Fig.3-1-2

•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.

3.2ASSEMBLY AND DISASSEMBLY OF MAIN PARTS

3.2.1 Assembly and disassembly

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

STEP	PART	Fig.	POINT	NOTE
No.	PART	No.	POINT	NOTE
No.		No.

[1]	TOP COVER ASSY	C1	4(S1a), 3(L1a),CN1a	-
[2]	UPPER ASSY	C2-1	(S2a),2(S2b),3(S2c)	-
	(Inc. VF ASSY,		2(SD1a),
	SPEAKER/MONITOR)		L2,CN2a,b
[8]	E.VF UNIT(B/W)	C2-2	2(S8),L8,CN8a	NOTE 8
( 1)	( 2)	( 3)	( 4)	( 5)

( 1) Order of steps in Procedure

When reassembling, preform the 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.

( 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.

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

NOTE11b:

STEP

Fig.

PART

POINT

NOTE

During the procedure, leave the CASSETTE COVER (C.

No.

COVER) open.

[1]

COVER(JIG CON)

FA1

S1a,S1b,JACK COVER(DV)

NOTE1a,b,c

NOTE11c:

[2]

COVER(TOP) ASSY

S2,L2

When disassembling, be careful in handling the JACK COV-

[3]

SHOE

FA2

3(S3)

ER (MIC) as it comes off together.

[4]

CENTER COVER

4(S4),L4

NOTE4

[5]

REAR COVER ASSY

FA3

3(S5a),S5b,S5c,S5d,L5a,L5b,CN5

NOTE5

NOTE12:

[6]

FRONT COVER(N-MG)ASSY

FA4

2(S6a),3(S6b),CN6

NOTE6a,b

During the procedure, be careful not to break the EJECT

[7]

MIC ASSY

2(S7),BKT(FRONT)

NOTE7

SW.

[8]

UPPER CASE ASSY

FA5

S8a,S8b,2(S8c),CN8,L8a,L8b

NOTE8

NOTE13a:

[9]

OP FRAME ASSY

FA6

2(S9),CN9a,CN9b

During the procedure, be careful in handling the HEAT

[10]

LOWER ASSY

FA7

CN10a,CN10b,CN10c,4(S10)

NOTE10a,b,c

SINK1.

[11]

COVER(FRONT) ASSY

FA8

3(S11a),S11b,JACK COVER(MIC)

NOTE11a,b,c

NOTE13b:

[12]

FRONT BOARD ASSY

S12,L12a,L12b

NOTE12

[13]

MAIN BOARD ASSY

FA9

3(S13a),2(L13a),SHIELD PLATE,

NOTE13a,b

Be careful with the wiring and the handling of the wire.

CN13a,b,c,S13b

Pay special attention for the wire folding position.

[14]

MDA BOARD ASSY

FA10-1

CN14a,b,c,d,2(S14)

NOTE15:

[15]

MECHA(B) ASSY

FA10-2

S15a,BKT(PRE-REC),3(S15b),

NOTE15

When attaching, be careful not to catch the FPC in between.

BKT(MECHA) ASSY

NOTE1a:

zDestination of connectors

During the procedure, leave the CASSETTE COVER (C.

COVER) open.

CN.NO.

CONNECTOR

NO.

NOTE1b:

CN5

MAIN

CN103

REAR

CN501

When removing the screw No.2, leave the JACK COVER

(DV) open. Be careful in handling the JACK COVER (DV),

CN6

MAIN

CN114

MIC

as it comes off together when disassembling.

CN8

MAIN

CN105

MONI.OPE

CN601

NOTE1c:

CN9a

MAIN

CN102

OP BLOCK

When removing the JACK COVER (DV), leave the VF AS-

CN9b

MAIN

CN101

CCD

CN5001

SEMBLY pulled out.

CN10a

MAIN

CN107

FRONT

CN401

NOTE4:

CN10b

MAIN

CN108

CAMERA OPE

During the procedure, leave the CASSETTE COVER (C.

CN10c

MAIN

CN112

SPEAKER

COVER) open.

CN13a

MAIN

CN104

MDA

CN305

NOTE5:

When removing the screw No.15, leave the JACK COVER

CN13b

MAIN

CN106

SENSOR

(DC) open.

CN13c

MAIN

CN109

HEAD

NOTE6a:

CN14a

MDA

CN304

LOADING MOTOR

During the procedure, be careful not to break the MAIN

CN14b

MDA

CN303

ROTARY ENCORDER SW -

BOARD parts.

CN14c

MDA

CN302

DRUM MOTOR

NOTE6b:

CN14d

MDA

CN301

CAPSTAN MOTOR

When attaching the screw No.20, be careful not to damage

the FFC.

NOTE7:

When attaching, be careful with the wiring..

NOTE8:

During the procedure, leave the CASSETTE COVER (C. COVER) open.

NOTE10a:

As the screw No.31 is located under the connector (CN10a), pull out the connector first, before removing the screw.

NOTE10b:

During the procedure, be careful in handling the HEAT SINK1.

NOTE10c:

When attaching, be careful with the wiring.

NOTE11a:

During the procedure, remove the GRIP BELT.

(No.YF087)1-7

+ 15 hidden pages