JVC GRD-850-UC, GRD-850-US, GRD-870-UC, GRD-870-US, GRD-875-US Service manual

SERVICE MANUAL

DIGITAL VIDEO CAMERA

YF228<Rev.001>20082SERVICE MANUAL

GR-D850UC, GR-D850US,
GR-D870UC, GR-D870US,

GR-D875US

GR-D850UCM,GR-D850USM [M8D523]
GR-D870UCM,GR-D870USM

COPYRIGHT© 2008 Victor Company of Japan, Limited

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

GR-D875USM [M8D525]

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

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

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

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

COPYRIGHT© 2008 Victor Company of Japan, Limited

No.YF228<Rev.001>

2008/2

SPECIFICATION

Camcorder

For General Power supply DC 11 V (Using AC Adapter)

DC 7.2 V (Using battery pack)

Power consumption Approx. 2.4 W (2.6 W*) (LCD monitor off, viewfinder on)

Approx. 7.5 W (Maximum; when charging the battery pack)
* Using LED Light
** The LCD Backlight is set to [STANDARD] mode.

Dimensions (W × H × D) 68 mm × 74 mm × 118 mm(2.68" × 2.91" × 4.65")

Weight Approx. 420 g (0.93 lbs) (without battery, cassette and lens cap)

GR-D850 Approx. 485 g (1.07lbs) (incl. battery, cassette and lens cap)
GR-D870 Approx. 490 g (1.08lbs) (incl. battery, cassette and lens cap)

Operating temperature 0°C to 40°C (32°F to 104°F)

Operating humidity 35% to 80%

Storage temperature -20°C to 50°C (-4°F to 122°F)

Pickup 1/6" CCD
Lens F1.8 to 4.0, f=2.2 mm to 77 mm, 35:1 power zoom lens
Filter diameter Ø30.5 mm
LCD monitor 2.7" 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 (5 ft)

For Digital Video
Camera

For Digital Still
Camera
* GR-D870only

For Connectors AV Video output 1.0 V (p-p), 75Ω, analog

Format DV format (SD mode)
Signal format NTSC standard
Recording/Playback

format

Cassette Mini DV cassette
Tape speed SP: 18.8 mm/s, LP: 12.5 mm/s
Maximum recording time

(using 80 min. cassette)
Storage media SD Memory Card/MultiMediaCard
Compression system JPEG (compatible)

File size Still image : 640 × 480 pixels

Picture quality 2 modes (FINE/STANDARD)

DV Input/output 4-pin, IEEE 1394 compliant
USB Mini USB-B type, USB 1.1 compliant

Video Digital component recording
Audio PCM digital recording, 32 kHz 4-channel (12-BIT), 48 kHz 2-channel (16-BIT)

SP: 80 min., LP: 120 min.

Audio output 300 mV (rms), 1 kΩ, analog, stereo

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.YF228<Rev.001>)

SECTION 1

r

PRECAUTIONS

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 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.

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

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 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.

1.2
5

2.0

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 sleeve

Conductors extended

Fig.1-1-7

(No.YF228<Rev.001>)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.

d

d'

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.

ab

Externally
exposed
accessible part

Z

V

c

A

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 m m

)

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

)

Fig.1-1-11

AC Line Voltage

100 V

110 to 130 V

110 to 130 V

220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

1

0.15

1.5

2

50

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

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.YF228<Rev.001>)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 DIFFERENCE LIST

The following table indicate main different points between models GR-D850UC, GR-D850US, GR-D870UC, GR-D870US,
and GR-D875US.

MODEL NAME GR-D850UC GR-D850US GR-D870UC

DSC

CD-ROM NO NO YES

USB CABLE/TERMINAL NO NO YES

REMOTE CONTROL UNIT NO NO NO

MODEL NAME GR-D870US GR-D875US

DSC

CD-ROM YES YES

USB CABLE/TERMINAL YES YES

REMOTE CONTROL UNIT NO YES(RM-V740US)

NO NO YES

YES YES

(No.YF228<Rev.001>)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
otherwise specified, tighten screws at a torque of 0.088N

·cm). However, as this is a required value at the time of

(0.9kgf

·m

production, use the value as a measuring stick when
proceeding repair services. (See "SERVICE NOTE(1)" 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

MINI BW CN762

40

10

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.

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

B-B Connector

B-B Connector

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

FPC Connector

Wire

FPC Connector

Wire

Lock

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.

· 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

Wire

FPC Connector

Lock

Lock

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

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.

3.2 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]

PART

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

[8]

E.VF UNIT(B/W)

(∗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.

Fig.
No.

4(S1a), 3(L1a),CN1a

C1

(S2a),2(S2b),3(S2c)

C2-1

2(SD1a),
L2,CN2a,b
2(S8),L8,CN8a

C2-2

POINT

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

NOTE

-

-

NOTE 8

1-6 (No.YF228<Rev.001>)

3.2.2 Assembly/Dissambly of cabinet parts and electrical parts

zDisassembly procedure

STEP

PART NAME

No.

[1]

COVER(LAST)

[2]

LOWER CASE(FRO) ASSY

[3]

FRONT CAVER ASSY

[4]

MIC

[5]

TOP COVER ASSY

[6]

UPPER ASSY

[7]

FRONT BOARD ASSY

[8]

LOWER CASE ASSY

[9]

CASSETTE COVER(SIDE)

[10]

CASSETTE COVER(TOP)

[11]

REAR ASSY

[12]

REAR BOARD ASSY

[13]

LOWER CASE(P) ASSY

[14]

OP BLOCK ASSY

[15]

ARM ASSY

[16]

MAIN BOARD ASSY

[17]

MECHANISM ASSY

[18]

MONITOR ASSY

[19]

TRIPOD(BASE)

[20]

JACK BOARD ASSY

Fig.
No.

3-2-1

3-2-2

3-2-3

3-2-4

3-2-5

3-2-6

3-2-7

3-2-8A

3-2-8B

3-2-9

3-2-10A

3-2-10B

3-2-11

3-2-12

3-2-13

3-2-14

3-2-15

3-2-16A

3-2-17

3-2-18A

3-2-18B

3-2-19

3-2-20

POINT NOTE

GRIP BELT,2(S1),L1a,b

3(S2)

2(S3a),S3b,CN3

S4

S5a,2(S5b)

COVER(JIG),S6a,b,c,CN6

S7,2(L7),CN7

S8a,b

-

2(S9),6(L9)

2(S10a)

S10b

2(S11),L11a,b,CN11a,b

S12,CN12

S13,L13a,b

CN14a,3(S14),L14,CN14b

4(S15),L15

CN16a,b,c,d,e,L16a,b

4(S17)

S18a,CN18

2(S18b),2(L18)

S19a,3(S19b)

S20a,b,2(L20)

NOTE1

-

NOTE3

NOTE4

-

NOTE6a,b

NOTE7

NOTE8a

NOTE8b

-

NOTE10a

NOTE10b,c

NOTE11a,b

NOTE12

NOTE13a,b

NOTE14a,b

NOTE15a,b

NOTE16

-

NOTE18a

NOTE18b

-

NOTE20a,b

NOTE1:

Pull out the GRIP BELT from the HOOK first as it interferes
with the procedure.

NOTE3:

When attaching, be careful with the wiring.
After connecting the wire to the connector, locate the wire
behind the FPC.

NOTE4:

When attaching, be careful with the wiring (MIC).

NOTE6a:

When removing, remove the COVER (JIG) first.

NOTE6b:

Please refer to Fig.3-2-18A and the following procedure for
removing the UPPER ASSY.

NOET7:

When attaching, be careful with the wiring.

NOTE8a:

During the procedure, be careful in handling the parts.
When the LOWER CASE ASSY is removed, the SHAFT
may come off.

NOTE8b:

When attaching, be careful with the FPC.

NOET10a:

During the procedure, be careful in handling the parts.
Be careful in handling the FPC as the switch connected to the
FPC is screwed on the back of the CASSETTE COVER (TOP).

NOET10b:

Be careful not to lose the KNOB (EJECT), or remove the
KNOB (EJECT) during the following procedures as it is easily
comes off when the CASSETTE COVER (TOP) is removed.

NOET10c:

When removing, carefully peel off and release the FPC as it
sticks to the ARM ASSY.

NOTE11a:

When attaching, be careful with the FPC.

NOTE11b:

When attaching, close the ARM ASSY.
When attaching, be careful with the wiring.

NOTE12:

When attaching, be careful with the wiring.

NOTE13a:

When removing, remove the screw (No.27) located under
the COVER (JACK) first.

NOTE13b:

When removing, be careful not to damage the HOOK (L13b).

NOTE14a:

When removing, the brackets are attached to the OP
BLOCK ASSY. During the procedure, remove the brackets
if necessary.

NOTE14b:

Refer to 3.2.3 Assembly/Disambly of [14] OP BLOCK ASSY/
CCD BOARD ASSYof OP BLOCK ASSY.

NOTE15a:

When removing, remove the 4 screws (No.31-34), and then
release the HOOK.

NOTE15b:

During the procedure, be careful with the grease applied to
the both sides.

NOTE16:

When attaching, be careful with the FPC.

NOTE18a:

Pay special attention in handling the removed UPPER
ASSY as the FPC is unstable.

NOTE18b:

Refer to 3.2.4 Disassembly of [18] MONITOR ASSY of
MONITOR ASSY.

NOTE20a:

When removing, be careful in handling the KNOB (SLIDE)
as they may come off.

NOTE20b:

When attaching, make sure that the LEVER of the SW inter­locks with the KNOB (SLIDE).

zDestination of connectors

CN.

No.

CONNECTOR

PIN
No.

CN3 MAIN CN2601 MIC - 4
CN6 MAIN CN103

JACK/MONITOR

CN401/CN7002 50/24,28
CN7 MAIN CN108 FRONT CN801 8
CN11a MAIN CN101/CN106
CN11b MAIN CN105

REAR

CN501/CN504 40/32

POWER/ZOOM UNIT

- 12
CN14a MAIN CN4201 CCD CN5001 20
CN14b MAIN CN4901 OP BLOCK ASSY

- 25
CN16a MAIN CN1604 SENSOR - 16
CN16b MAIN CN1603 CAPSTAN MOTOR

- 18
CN16c MAIN CN1602 DRUM MOTOR - 11
CN16d MAIN CN3501 HEAD - 8

CN16e MAIN CN1601
/ROTARY ENCODER

LOADING MOTOR

8

-

CN18 JACK CN401 MONITOR CN7002 24

(No.YF228<Rev.001>)1-7

1

(S1)

2

(S1)

[1]

7

(S3a)

6

(S3a)

NOTE3

GRIP BELT

NOTE1

HOOK

Fig.3-2-1

L1a

L1b

[3]

8

(S3b)

CN3

NOTE3

Fig.3-2-3

FPC

WIRE

6

(S3a)

7

(S3a)

8

(S3b)

[2]

5

(S2)

3

(S2)

4

(S2)

Fig.3-2-2

3

(S2)

[4]

NOTE4

WIRE(MIC)

9

(S4)

PLATE(MIC)

NOTE4

Slot WIRE(MIC) between
these bosses.

BOSS

Fig.3-2-4

1-8 (No.YF228<Rev.001>)

10

(S5a)

11

(S5b)

12

(S5b)

[5]

L7

[7]

Fig.3-2-5

NOTE6a

COVER(JIG)

10

(S5a)

16

(S7)

FPC

NOTE7

CN7

NOTE7

FPC

Dress FPC as shown in figure.

Fig.3-2-7

17

(S8a)

CN6

(S6b)

14

13

(S6a)

13

(S6a)

Fig.3-2-6

14

(S6b)

NOTE6b

[6]

15

(S6c)

17

(S8a)

NOTE8a

SHAFT

[8]

18

(S8b)

Fig.3-2-8A

(No.YF228<Rev.001>)1-9

NOTE8b

Ensure this part of LOWER CASE is on top of FRAME ASSY.

18

(S8b)

21

(S10a)

21

(S10a)

[10]

NOTE10a

FPC

Fold the MECHA FPC towards LOWER SIDE
when attaching LOWER CASE ASSY.

Fig.3-2-8B

L9

[9]

19

(S9)

19

(S9)

22

(S10a)

c

c

ARM ASSY

23

(S10b)

Fig.3-2-10A

KNOB(EJECT)

NOTE10b

20

(S9)

1-10 (No.YF228<Rev.001>)

Fig.3-2-9

FPC

NOTE10c

[10]

Fig.3-2-10B

24

(S11)

25

(S11)

ARM ASSY

NOTE11a

FPC

L11b

CN11a

CN11b

Fig.3-2-11

[11]

L11a

24

(S11)

(S11)

SW(EJECT)

NOTE11b

CN11a

CN11b

25

27

(S13)

NOTE13a

[13]

Fig.3-2-13

REAR COVER
ASSY

NOTE13b

L13b

L13a

NOTE12

BOSS

[12]

WIRE

NOTE12

CN12

26

(S12)

CN14b

L14

30

(S14)

CN14a

29

(S14)

28

(S14)

[14]

NOTE14a,b

Fig.3-2-12

Fig.3-2-14

(No.YF228<Rev.001>)1-11

NOTE15a

[15]

31

(S15)

NOTE16

33

(S15)

34

(S15)

g

32

(S15)

33

(S15)

34

(S15)

NOTE15b

35

(S16)

Fig.3-2-15

NOTE16

[16]

CN16e

g

A

CN16d

CN16a

B

C

CN16c

L16b

E

D

CN16b

L15

CN16a

(S17)

CN16b CN16c CN16d CN16e

Fig.3-2-16B

39

(S17)

36

37

(S17)

38

(S17)

AA

L16a

1-12 (No.YF228<Rev.001>)

E E

C

BB

Fig.3-2-16A

FRAME ASSY

HOOK

DD

[17]

Fig.3-2-17

[18]

40

(S18a)

NOTE18a

FPC

CN18

43

(S19a)

44

(S19b)

(S19b)

[19]

45

46

(S19b)

L18

41

(S18b)

Fig.3-2-18A

42

(S18b)

NOTE18b

[18]

NOTE20b

NOTE20a

KNOB(SLIDE)

NOTE20b

LEVER

Fig.3-2-19

47

(S20a)

SW

L20

KNOB(SLIDE)

JACK
BOARD ASSY

48

(S20b)

[20]

Fig.3-2-18B

SW

Fig.3-2-20

(No.YF228<Rev.001>)1-13

3.2.3 Assembly/Disambly of [14] OP BLOCK ASSY/CCD BOARD ASSY

zPrecautions

(1) Be careful in handling the CCD IMAGE SENSOR, OPTI-

CAL LPF and the LENS components. Pay special atten­tion not to soil or damage the surfaces., especially with
regard to surface contamination, attached dust or
scratching. If fingerprints are present on the surface they
should be wiped away using either a silicon paper, clean
chamois or the cleaning cloth.

(2) The CCD IMAGE SENSOR may have been shipped with

a protective sheet attached to the transmitting glass.
When replacing the CCD IMAGE SENSOR, do not peel
off this sheet from the new part until immediately before
it is mounted in the OP BLOCK ASSY.

(3) As the CUSHION(OP) protects the OP BLOCK ASSY

from scratches or damages, leave the CUSHION as
long as it does not interfere with the procedure.

zDisassembly of OP BLOCK ASSEMBLY / CCD BOARD AS-

SEMBLY

(1) Unsolder the fourteen soldered points (SD11a) of the

CCD BOARD ASSY.

(2) Remove the two screws (1,2), and then remove the CCD

BOARD ASSY and the CCD BASE ASSY.

NOTE11a:

When removing the CCD BASE ASSY, be careful in
handling as the CCD IMAGE SENSOR may be re­moved together with the SHEET and the OP LPF at­tached.

NOTE11\b:

Replace the CCD IMAGE SENSOR as a CCD BASE
ASSY, not as a single part replacement.

zAssembly of OP BLOCK ASSEMBLY / CCD BOARD AS-

SEMBLY

(1) Set the OPTICAL LPF first, and then the SHEET to the

(2) Attach the CCD BASE ASSY first, then the CCD BASE

(3) Solder the 14 points (SD11a) on the CCD BOARD AS-

zReplacement of service repair parts

The service repair parts for the OP BLOCK ASSY are as listed
below.
When replacing the parts, remove the BKT OP (1) and (2) first
if necessary.
When replacing parts, be careful not to cut the FPCs or dam­age any parts by soldering (excessive heat).

(1) FOCUS MOTOR UNIT
(2) ZOOM MOTOR UNIT
(3) AUTO IRIS UNIT

NOTE 13e:

When replacing the FOCUS MOTOR UNIT or the ZOOM
MOTOR UNIT, solder the FPC at a space of about 0.5 mm
above the terminal pin.

NOTE 13f:

The IRIS MOTOR UNIT includes the FPC ASSY and two
sensors.

OP BLOCK ASSY.

NOTE11c:

Be careful with the attachment direction of the OP
LPF.

ASSY so that the SHEET stays in place, and then tighten
with the two screws (1, 2).

SY.

ZOOM MOTOR

UNIT

5

(S14c)

BKT OP(2) ASSY

9

(S14d)

10

(S14d)

6

(S14c)

HOOK

11

(S14d)

SD14b

13

(S14d)

12

(S14d)

14

(S14d)

(S14d)

NOTE14d

AUTO IRIS
UNIT

8

(S14d)

7

FOCUS MOTOR
UNIT

OP LPF

3

(S14c)

NOTE14c

SD14a

CCD BASE ASSY

NOTE14a,b

SHIEET

BKT OP(1) ASSY

1

(S14a)

CCD BOARD
ASSY

2

(S14a)

1-14 (No.YF228<Rev.001>)

Fig.3-2-21

4

(S14c)

:0.147 N・m (1.5kgf・cm)

3.2.4 Disassembly of [18] MONITOR ASSY

zCAUTIONS

(1) During the procedure, be careful in handling the LCD

MODULE and other parts. Pay special attention not to
damage or soil the monitor screen.
If fingerprints are left on the screen, wipe them with clean
chamois leather or a cleaning cloth.

zRemoving MONITOR ASSEMBLY

(1) Remove the 2 screws (1 and 2).
(2) Turn the HINGE UNIT ASSY 90º, and remove the two

screws (3 and 4).

(3) Remove the MONITOR COVER ASSY by removing the

6 hooks (L18a-f).

(4) Release the lock of the connector (CN18a), and remove

the HINGE UNIT by lifting it up.

NOTE18a:

During the procedure, be careful in handling the FPC.

(5) Release the lock of the connector (CN18b), and pull out

the FPC.

(6) Remove the 2 screws (5 and 6), and remove the MONI-

TOR BOARD ASSY .

NOTE18b:

Be careful in handling as the parts located below may
be misaligned or removed when the MONITOR
BOARD ASSY is removed.
Attach the MONITOR BOARD ASSY by lifting up the
MONITOR CASE as the KNOB (CURSOR) that is at­tached to the BOARD sticks out toward the LCD
screen.

NOTE18c:

When replacing the MONITOR CASE or when there is
no need to replace individual parts in the MONITOR
CASE, remove the whole parts from the SHEET
(M.REF) to the LCD SA as a unit.

(7) Remove the SHEET (M.REF), LIGHT GUIDE, SHEET

(M/DIFF), and the SHEET(BEF)1.

NOTE18d:

When attaching, insert one side of the SHEET (M/
DIFF) under the LCD CASE RIB.

NOTE18e:

When attaching, insert each tab on both sides of the
SHEET (M.REF) into the LCD CASE notch.

(8) Remove the SHIELD CASE(MONI), LCD MODULE,

SHEET(COVER) and the LCD CASE.

NOTE18f:

During the procedure, handle the 4 parts (SHIELD
CASE(MONI), LCD MODULE, SHEET(COVER)) to­gether.

zRemoving HINGE UNIT ASSEMBLY

(1) While removing the 6 HOOKs (L18t-w) from one side

and then from the other side, remove the HINGE COV­ER (U).

NOTE18g:

Be careful in handling the HINGE ASSY as grease is

applied inside.
(2) Remove the HINGE COVER(L).
(3) Remove the MAGNET.

NOTE18h:

During the procedure, be careful in handling the mag-

net.

When attaching, set the negative pole outside as
shown in the figure. Be careful when removing as
there is no marking.

NOTE18j:

During the procedure, be careful in handling the FPC.

NOTE18k:

The FPC is rolled around the axis of rotation of the
HINGE ASSY 2.5 rounds (2.5times).
The connecting side to the MONITOR BOARD ASSY
is placed inside.

(No.YF228<Rev.001>)1-15

FPC

LIB

NOTE18d

HINGE ASSY

<HINGE UNIT ASSY>

H.COVER(U)

L18g

NOTE18j

FPC

H.COVER(L)

L18v

L18w

NOTE18k

NOTE18g

HINGE UNIT

NOTE18h

MAGNET

MONITOR COVER

ASSY

3

(S18b)

NOTE18g

HINGE UNIT

ASSY

FPC

NOTE18a

MONITOR

BOARD ASSY

CN18a

NOTE18c

SHEET
(M.REF)

L18a

a

4

(S18b)

L18g

L18h

[18]

L18b

L18f

L18e

L18d

b

C

C

L18c

5

(S18c)

B

CN18b

6

(S18c)

KNOB

(CURSOR)

L18j

NOTE18e

L18t

NOTE18f

<LCD SA>

L18s

L18r

L18q

L18u

SHILD CASE
(MONI)

LCD MODULE

SHEET(COVER)

L18t

LCD CASE

L18p

L18n

L18m

NOTE18e

L18k

LIGHT GUIDE

SHEET
(M/DIFF)

NOTE18d

SHEET
(BEF)1

NOTE18f

LCD SA

NOTE18e

MONITOR CASE

a

NOTE18d

NOTE18d

LIB

LIB

b

(S18a)

NOTE18e

B

BUTTON
(MONI)

NOTE18b

1

2

(S18a)

1-16 (No.YF228<Rev.001>)

Fig.3-2-22

3.3 DVC MECHANISM

3.3.1 TOOLS REQUIRED FOR ADJUSTMENTS

1.

Torque driver

YTU94088

2.

Bit

YTU94088-003

1. Torque driver

Be sure to use to fastening the mechanism and exterior parts
because those parts must strictly be controlled for tightening
torque.
Torque setting value of torque driver is limited. At the values
over the maximum torque setting value, fasten a screw manu­ally not to damage the screw thread.

3.

Tweezers

P-895

Chip IC replacement jig

4.

PTS40844-2

2. Bit

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

3. Tweezers

To be used for removing and installing parts and wires.

4. Chip IC replacement jig

5.

Guide driver

YTU94148A-1

6.

Cleaning cloth

KSMM-01

To be used for replacement of part.

5.Guide driver

To be used for the height adjustment such as the guide rollers.

6. Cleaning cloth

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

3.3.2 Precautions

(1) When fastening parts, pay careful attention to the tightening torque of each screw. Unless otherwise specified, tighten a screw

with the torque of 0.055 N

·m (0.56 kgf·cm).

(2) Be sure to disconnect the set from the power supply before fastening and soldering parts.
(3) When disconnecting/connecting wires, be careful not to get them and their connectors damaged.
(4) When replacing parts, be very careful neither to damage other parts nor to fit wrong parts by mistake.

(No.YF228<Rev.001>)1-17

3.3.3 Notes on procedure for disassembly/assembly

The DISASSEMBLY PROCEDURE TABLE shows the procedure to disassemble/reassemble mechanism parts.
Carefully read the following explanation before starting actual disassembling/reassembling work. The item numbers(circled num­bers)in the following explanation correspond to those appearing under respective columns of the table.

Example

NO. PART NAME FIG. POINT NOTE REMARKS

[1]

[2]

[3]

[4]

[5]

[6]

*1 *2 *3 *4 *5 *6 *7

*1 Numbers appearing in this column indicate the order to re-

move parts. When reassembling, follow these numbers in
the reverse order. Circled numbers in this column corre­spond to those appearing in drawings of this section.

*2 This column shows part names corresponding to numbers

in the left column.

*3 The symbol (T or B)appearing in this column shows the

side which the objective part is mounted on.
T =the upper side, B =the lower side

*4 Symbols appearing in this column indicate drawing num-

bers.

*5 This column indicates parts and points such as screws,

washers,springs,and others to be removed/fitted for disas­sembling/reassembling the mechanism. Besides such the
parts, this column occasionally indicates working points.

P= Spring
W = Washer
S= Screw
* = Lock (L),soldering (SD),shield,connector (CN),etc.

CASSETTE HOUSING ASSY T Fig.2-4-3 3(S1),(L1a)-(L1e)

UPPER BASE ASSY T Fig.2-4-4 (S2),(L2a),(L2b)

DRUM ASSY T (S3a),2(S3b)

REEL DISK ASSY(SUP) T Fig.2-4-5 (W4)

REEL DISK ASSY(TU) T

REEL COVER ASSY T

(W5a),(W5b),(W5c)

(W6),(S6a),2(S6b)

*6 Numbers in this column represent the numbers of notes in

the text.
(For parts that need phase adjustment after reassembling,
refer to “MECHANISM ADJUSTMENTS”.)

*7 This column indicates required after-disassembling/-reas-

sembling work such as phase adjustment or mechanism
adjustment.

NOTE 1 a,b,c,d

NOTE 2

NOTE 3 a,b

NOTE 4 a

NOTE 5 a,b

NOTE 6

ADJUSTMENT

ADJUSTMENT

Example

• Remove (W1)=Washer W1.

• Remove the solder at (SD1)=Point SD1.

• Disconnect A = Connector A.

1-18 (No.YF228<Rev.001>)

3.3.4 DISASSEMBLY AND ASSEMBLY OF MECHANISM ASSEMBLY

Half Panch

3.3.4.1 General statement

The mechanism should be disassembled/assembled in the
CASS IN mode (ASSEMBLY mode). (Refer to Fig. 3-3-2,3-3-5.)
When the mechanism assembly is removed from the main body,
it is generally set in the STOP mode.
After the mechanism assembly is removed from the main body,
it is required to forcibly supply 3V DC to the LOADING MOTOR
to unload, and then set the CASS IN mode.

<Mechanism assembly/Cassette housing assembly>

3.3.4.2 Mechanism modes

The mechanism mode of this model is classified into five modes
as shown in Fig. 3-3-9. Each mechanism mode can be distin­guished from others by the relative position of “ ”, “ ”, “ ”
marks on the sub cam gear to the inner or outer protrusion on the
main deck. Refer to Fig. 3-3-3 to 3-3-8 below.

DC3V

<Confirmation of mode>

LOADING MOTOR

<MAIN CAM GEAR>

TOP VIEW BOTTOM VIEW

Fig.3-3-3

：HOLE(Penetration)
：Half Panch

<EJECT mode>

Fig.3-3-1

<Back side of the mechanism assembly>

CASS INOQFG

HOLE

Half Panch

Half Panch

Fig.3-3-4

<CASS IN mode>

Fig.3-3-5

<SHORT FF mode>

Fig.3-3-6

<STOP mode>

Back side of deck

Fig.3-3-2

Fig.3-3-7

<PLAY mode>

Fig.3-3-8

(No.YF228<Rev.001>)1-19

3.3.4.3 Mechanism timing chart

PARTS

ROTARY
ENCODER

MAIN CAM

SUB CAM

PRESS ARM

T.C. PLATE

MODE

-69.2

a

b

c

PRESS

OFF

EJECT

OFF1

OFF2

EJECT CAS. IN

o

-68.4

o

-54.7

(-50

(-65

-40

o

)

-52

o

)

-49.2

o

o

o

o

-6.5

o

-46.3

-5.5

o

0

3.4

TU. P. B

END

182.8

SLIDE

END

187.8

STOP PLAYFWD

o

244.5

254.5

273.6

o

260

o

o

274.5

o

190

(200o)

o

247

(260o)

o

o

205.3

o

o

o

210.8

199.8

o

150

(149o)(126.9o)

o

195

(193.8o)(164.9o)

o

210.5

o

SHORT

SLIDE

49.3

o

START

(49.1

(63.8

o

78.3

90.3o101.3o113.3

o

)

o

)

95.8

70

91

o

o

o

o

CCW

o

o

o

5.5

o

0

o

0

o

TENSION ARM

T5 ARM

SLIDE DECK

S1 ARM

POLE BASE

PINCH ROLLER

ON

LO2

LO1

UL

ON

OFF

LO

UL

PRESS

LO

UL

PRESS

LO

UL

PRESS

SLIDE

OFF

3.4

o

69

o

67.2

o

o

79.6

o

67.2

o

67.2

o

14

o

67.2

o

67.2

127.8

o

o

204

o

204

o

204

o

164.2

TOUCH

173.6

TOUCH

o

204

o

204

o

o

244.5

o

225.5

o

220.2

TOUCH

o

204

Fig.3-3-9

1-20 (No.YF228<Rev.001>)

3.3.5 DISASSEMBLY PROCEDURE TABLE

MARK: # After assembly, perform adjustments.

NO. PART NAME FIG. POINT NOTE REMARKS

[1] HOUSING ASSY T 3-3-10 2(S1),L1a,b,c,d NOTE1a,b ADJUSTMENT

[2] DRUM PROTECTOR T 3-3-11 S2,L2a,b NOTE2

[3] DRUM ASSY T 3-3-11 3(S3),L3a,b NOTE3a,b #

[4] REEL COVER ASSY T 3-3-11 2(S4),2(L4a),L4b,c NOTE4

[5] IDLER ARM ASSY T 3-3-12 - -

[6] T5 ARM ASSY T 3-3-12 L6a,b NOTE6a,b ADJUSTMENT

[7] TENSION ARM ASSY T 3-3-12 L7a,S7,L7b,2(L7c) NOTE7a,b,c ADJUSTMENT/#

[8] S1 ARM ASSY T 3-3-13 L8 NOTE8 ADJUSTMENT

[9] SLIDE GUIDE PLATE T 3-3-13 S9,L9 NOTE9a,b ADJUSTMENT/#

[10] GUIDE PLATE T 3-3-13 S10,L10 - ADJUSTMENT

[11] SLIDE DECK ASSY T 3-3-14A 2(L11a),3(L11b),2(L11c) NOTE11a,b ADJUSTMENT/#

[12] CASSETTE GUIDE T 3-3-14B S12,2(L12) -

[13] PINCH ROLLER ARM ASSY T 3-3-14B L13 NOTE13a,b,c

[14] REEL DISK ASSY (SUP) T 3-3-14B L14 NOTE14a,b

[15] REEL DISK ASSY (TU) T 3-3-14B L15 NOTE15a,b,c

[16] BRAKE PLATE T 3-3-14B - NOTE16 ADJUSTMENT

[17] T. C. PLATE ASSY T 3-3-15 L17,SLIDE COLLAR1 NOTE17

[18] DRUM BASE T 3-3-15 3(S18),L18a,2(L18b) NOTE18

[19] DRIVE ARM ASSY T 3-3-15 L19,SLIDE COLLAR2 NOTE19a,b ADJUSTMENT

[20] GUIDE RAIL ASSY T 3-3-16 S20 NOTE20 ADJUSTMENT/#

[21] T5 CATCHER T 3-3-16 S21,L21 -

[22] CAPSTAN MOTOR T 3-3-16 2(S22) NOTE22

[23] REEL PULLEY T 3-3-16 - -

[24] CENTER GEAR T 3-3-16 - -

[25] MOTOR BRACKET ASSY T 3-3-17 S25 NOTE25a,b,c

[26] BELT GUIDE T 3-3-17 S26,2(L26) -

[27] GEAR COVER T 3-3-17 3(S27),L27a,b,c,d NOTE27 ADJUSTMENT

[28] PRESS ARM ASSY T 3-3-17 L28 NOTE28 ADJUSTMENT

[29] SUB CAM T 3-3-18 - NOTE29 PHASE ADJUSTMENT

[30] CONNECT GEAR T 3-3-18 - NOTE30

[31] MAIN CAM T 3-3-18 - NOTE31 PHASE ADJUSTMENT

[32] ROTARY ENCODER T 3-3-19 L32 NOTE32 PHASE ADJUSTMENT

[33] LOADING GEAR 1 T 3-3-19 - -

[34] GUIDE ROLLER (S) ASSY T 3-3-19 - NOTE34a,b #

[35] COMPRESSION SPRING T 3-3-19 - NOTE35

[36] MAIN DECK ASSY T 3-3-19 - - #

[ 1 ]

(No.YF228<Rev.001>)1-21

< TOP VIEW >

[34] [35] [ 3 ]

[ 2 ][32] [33] [19] [18] [20] [21]

[25]

[27]

[17]

[ 7 ]

[ 8 ]

[10]

[31]

[12]

[22]

[36]

[ 6 ]

[26]

[29]

[30]

[28]

[15]

[16]

[14][11] [ 9 ] [ 5 ] [ 4 ] [30]

< BOTTOM VIEW >

[25][22][ 2 ]

[36]

[32]

[31]

[11]

[19]

1-22 (No.YF228<Rev.001>)

3.3.6 DISASSEMBLY/ASSEMBLY

3.3.6.1 [1] HOUSING ASSY

NOTE1a:

When disassembling/ assembling the MECHANISM ASSY,
make sure to remove the HOUSING ASSY.
When removing the HOUSING ASSY, make sure to bring the
HOUSING ASSY up either by changing the mechanism mode
to the EJECT mode, or by moving the EJECT LEVER to the di­rection as indicated by the arrow.
During the procedure, make sure to return to the CASS IN
mode if the mode was changed.

NOTE1b:

Be careful not to damage the LEFT ARM2,RIGHT ARM2 dur­ing work.

<NOTE1a,b>

L1a L1b

L1c

LEFT

ARM2

NOTE1b

L1d

RIGHT
ARM2

NOTE1b

EJECT

LEFT ARM2

3.3.6.2 [2] DRUM PROTECTOR
[3] DRUM ASSY
[4] REEL COVER ASSY

NOTE2:

During the procedure, be careful in handling the FPC.

NOTE3a:

When removing, carefully hold the top center of the DRUM
ASSY with fingers otherwise it may possibly fall off.

NOTE3b:

Pay extra attention to the soil, dust and scratch on the surface.
During the procedure, be careful not to cut/ damage the FPC.

NOTE4:

During the procedure, remove the LED from the REEL COVER
ASSY first to set the FPC free, remove the two screws (7, 8),
then remove the REEL COVER ASSY by sliding it to the direc­tion as indicated by the arrow.
During the procedure, be careful in handling the FPC.

LEVER

RIGHT ARM2

<NOTE2> <NOTE4>

FPC

LED

[ 1 ]

NOTE1a

NOTE3a

[3]

NOTE3b

[4]

1

(S1)

NOTE2

Fig.3-3-10

[2]

L4c

L4a

3

(S2)

L3a

L4b

2

(S1)

4

(S3)

L2a

5

(S3)

6

(S3)

L2b

L3b

FPC

NOTE4

<NOTE3a>

6

(S3)

(S3)

< bottom side >

7

FPC

DRUM

5

4

(S3)

LED

SIDE

FPC

8

(S4)

(S4)

Fig.3-3-11

(No.YF228<Rev.001>)1-23

3.3.6.3 [5] IDLER ARM ASSY

L7c

[6] T5 ARM ASSY
[7] TENSION ARM ASSY

NOTE6a:

There are two types of the T5 ARM ASSY. They are different
in shape. The old type is without a hook and the new type is
with a hook.
When an old type is replaced by a new type, replace the
PINCH ROLLER ARM ASSY at the same time as the proper
combination of the parts is required.
When removing, remove the spring from the hook first if there
is a hook.

NOTE6b:

When mounting, pay attention to the correct positioning.

<NOTE6a>

< OLD TYPE > < NEW TYPE >

[7]

L7a

L7c

L7c

L6a

NOTE7a:

During the procedure, be careful in handling the TENSION
BAND.

NOTE7b:

When mounting, attach the TENSION BAND along the groove
of the gear.

NOTE7c:

When mounting, pay attention to the correct positioning.
When mounting, attach the TENSION ARM ASSY with the
plate moved to the direction as indicated by the arrow.
If the plate is moved to the other direction, the TENSION
BAND may break during the operation check as there is too
much tension.
After the mounting, adjust the TENSION ARM ASSY.

<NOTE7b,c>

< TOP >

TENSION BAND

< FRONT >

L7b

(S7)

[5]

NOTE6a

L6b

[6]

NOTE6b

9

TENSION BAND

NOTE7a

Fig.3-3-12

1-24 (No.YF228<Rev.001>)

3.3.6.4 [8] S1 ARM ASSY
[9] SLIDE GUIDE PLATE
[10] GUIDE PLATE

NOTE8:

When mounting, pay attention to the correct positioning.

NOTE9a:

When mounting, pay attention to the correct positioning.

NOTE9b:

After attachment, adjust the SLIDE GUIDE PLATE.

L10

[10]

3.3.6.5 [11] SLIDE DECK ASSY

NOTE11a:

When removing, set the FPC free first.
During the procedure, be careful not to cut the FPC.

NOTE11b:

During the procedure, be careful in handling.

<NOTE11a>

L11c

T5 CATCHER

L11a

FPC

(S10)

[11]

11

L8

L11b

L9

[8]

NOTE8

Fig.3-3-13

L11b

FPC

10

(S9)

NOTE9a,b

NOTE11a

[9]

L11a

Fig.3-3-14A

L11c

NOTE11b

MIC SW

(No.YF228<Rev.001>)1-25