JVC DRMV-2-SEL Service manual

SERVICE MANUAL

DVD VIDEO RECORDER & VIDEO CASSETTE RECORDER

YD087200511

DR-MV2SEL,DR-MV2SEU,

DR-MV2SEY,DR-MV2SEZ

Area Suffix

EL ------------ South Europe EU -------- Western Europe EY -------- Northern Europe EZ --------- Eastern Europe

STANDBY/ON

OPEN/ CLOSE

SET UP

ON SCREEN

EJECT

VCR DVD

REPEAT

ABC.@/: DEF

JKLGHI MNO

TUVPQRS WXYZ

CLEAR AUDIO

TIMERPROG

SHOWVIEW

DUBBING

VCR REC

REC

SPEED

MONITOR

ENTER

PLAYSLOW SLOW

RM-SDR057E

ZOOM

MENU/LISTTOP MENU

RETURN

PAUSEDVD REC STOP

VCR

SLOW

VCR

SYSTEM

STANDBY/ON

VCR

DUBBING

VCR/DVD

DVD

S-VIDEO VIDEO

(MONO)

L-

VCR DVD

AUDIO-R

DR-MV2SEL, DR-MV2SEU, DR-MV2SEY, DR-MV2SEZ [D5RV02]

Since the whole DVD mechanism assembly unit is replaced, the DVD recorder mechanism of this unit need not be adjusted.

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36

No.YD087

2005/11

SPECIFICATION

DR-MV2SEL,DR-MV2SEU,DR-MV2SEY,DR-MV2SEZ

General

System DVD-Video, DVD-RW / R, DVD+RW / R, CD-DA, CD-RW / R, Video Cassette Tape

VCR video heads Four heads

Power requirements 220-240 V~±10%, 50 Hz ±0.5%

Power consumption 35 W (standby: 5.0 W)

Weight 4.3 kg

Dimensions (width x height x depth) 435 x 99.5 x 262 mm

Operating temperature

Operating humidity Less than 80% (no condensation)

TV format PAL B / G

Recording

Recording format Video Recording format (DVD-RW only),

Recordable discs DVD-ReWritable, DVD-Recordable

Video recording format Sampling frequency 13.5 MHz

Compression format MPEG

Audio recording format Sampling frequency 48 kHz

Compression format Dolby Digital

Tuner

Receivable channels E2-E69

Note

• . The specifications and design of this product are subject to change without notice.

5ºC~40ºC

Video format (DVD-RW, DVD-R)

1-2 (No.YD087)

SECTION 1

PRECAUTION

1.1 IMPORTANT SAFETY PRECAUTIONS

1.1.1 Product Safety Notice

Some electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by a on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The Product's Safety is under review continuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm 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.

1.1.2 Precautions during Servicing

(1) Parts identified by the symbol are critical for safety. Re-

place only with part number specified.

(2) In addition to safety, other parts and assemblies are spec-

ified for conformance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.

(3) Use specified internal wiring. Note especially:

a) Wires covered with PVC tubing b) Double insulated wires c) High voltage leads

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

Note especially:

a) Insulation tape b) PVC tubing c) Spacers d) Insulators for transistors

(5) When replacing AC primary side components (transform-

ers, power cord, etc.), wrap ends of wires securely about the terminals before soldering.

(6) Observe that the wires do not contact heat producing parts

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

(7) Check that replaced wires do not contact sharp edges or

pointed parts.

(8) When a power cord has been replaced, check that 5 - 6 kg

of force in any direction will not loosen it.

(9) Also check areas surrounding repaired locations.

(10) Be careful that foreign objects (screws, solder droplets,

etc.) do not remain inside the set.

(11) Crimp type wire connector

The power transformer uses crimp type connectors which connect the power cord and the primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards. Replacement procedure

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

point close to the connector.

Important: Do not re-use a connector. (Discard it.)

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.

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

the wires fully into the connector.

d) Use a crimping tool to crimp the metal sleeve at its

center. Be sure to crimp fully to the complete closure of the tool.

(12) When connecting or disconnecting the internal connectors,

first, disconnect the AC plug from the AC outlet.

(No.YD087)1-3

1.1.3 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 their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.

1.1.3.1 Clearance Distance

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

Table 1 : Ratings for selected area

AC Line Volt age Clearance Dist ance (d), (d’)

Chassis or Secondary Conductor

Primary Circuit Terminals

dd'

220 to 240 V

Note:

This table is unofficial and for reference only. Be sure to confirm the precise values.

1.1.3.2 Leakage Current Test

Confirm the specified (or lower) leakage current between B (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.) is lower than or equal to the specified value in the table below.

Measuring Method (Power ON) :

Insert load Z between B (earth ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across the terminals of load Z. See Fig. 2 and the following table.

3 mm(d)

6 mm(d’)

Fig.1

Exposed Accessible Part

One side of

Power Cord Plug Prongs

AC Voltmeter (High Impedance)

Table 2: Leakage current ratings for selected areas

AC Line Volta ge Load Z Leak age Cur rent (i)

RES.

Connected in

220 to 240 V

parallel

50k RES.

Connected in

parallel

Note:

This table is unofficial and for reference only. Be sure to confirm the precise values.

1-4 (No.YD087)

i0.7mA AC Peak

i2mA DC

i0.7mA AC Peak

i2mA DC

Fig.2

One side of po wer cord plug

prongs (B) to:

RF or

Antenna terminals

A/V Input, Output

1.2 STANDARD NOTES FOR SERVICING

1.2.1 Circuit Board Indications

(1) The output pin of the 3 pin Regulator ICs is indicated as

shown.

Top View

Bottom View

Input

Out

(2) For other ICs, pin 1 and every fifth pin are indicated as

shown.

Pin 1

1.2.3 Pb (Lead) Free Solder

When soldering, be sure to use the Pb free solder.

1.2.4 How to Remove / Install Flat Pack-IC

1.2.4.1 Removal

1.2.4.1.1 With Hot-Air Flat Pack-IC Desoldering Machine:.

(1) Prepare the hot-air flat pack-IC desoldering machine, then

apply hot air to the Flat Pack-IC (about 5 to 6 seconds). (Fig. 1)

(3) The 1st pin of every male connector is indicated as shown.

Pin 1

1.2.2 Instructions for Connectors

(1) When you connect or disconnect the FFC (Flexible Foil

Connector) cable, be sure to first disconnect the AC cord.

(2) FFC (Flexible Foil Connector) cable should be inserted

parallel into the connector, not at an angle.

FFC Cable

Connector

CBA

Fig.1

(2) Remove the flat pack-IC with tweezers while applying the

hot air.

(3) Bottom of the flat pack-IC is fixed with glue to the CBA;

when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. 6)

(4) Release the flat pack-IC from the CBA using tweezers.

(Fig. 6)

1.2.4.1.2 Caution:

(1) The Flat Pack-IC shape may differ by models. Use an ap-

propriate hot-air flat pack-IC desoldering machine, whose shape matches that of the Flat Pack-IC.

(2) Do not supply hot air to the chip parts around the flat pack-

IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. 2)

(3) The flat pack-IC on the CBA is affixed with glue, so be care-

ful not to break or damage the foil of each pin or the solder lands under the IC when removing it.

Hot-air Flat Pack-IC Desoldering Machine

CBA

* Be careful to avoid a short circuit.

Masking Ta pe

Tweezers

Flat Pack-IC

Fig.2

(No.YD087)1-5

1.2.4.1.3 With Soldering Iron:

(1) Using desoldering braid, remove the solder from all pins of

the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig.

Flat Pack-IC

Desoldering Braid

Soldering Iron

Fig.3

(2) Lift each lead of the flat pack-IC upward one by one, using

a sharp pin or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. 4)

1.2.4.1.4 With Iron Wire:

(1) Using desoldering braid, remove the solder from all pins of

the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig.

(2) Affix the wire to a workbench or solid mounting point, as

shown in Fig. 5

(3) While heating the pins using a fine tip soldering iron or hot

air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads as shown in Fig. 5

(4) Bottom of the flat pack-IC is fixed with glue to the CBA;

when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. 6)

(5) Release the flat pack-IC from the CBA using tweezers.

(Fig. 6)

Note:

When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied.

Hot Air Blower

Sharp Pin

Fine Tip Soldering Iron

Fig.4

(3) Bottom of the flat pack-IC is fixed with glue to the CBA;

when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. 6)

(4) Release the flat pack-IC from the CBA using tweezers.

(Fig. 6)

To Solid Mounting Point

CBA

Tweezers

Iron Wire

Soldering Iron

Fig.5

Fine Tip Soldering Iron

Flat Pack-IC

1-6 (No.YD087)

Fig.6

1.2.4.2 Installation

(1) Using desoldering braid, remove the solder from the foil of

each pin of the flat pack-IC on the CBA so you can install a replacement flat pack-IC more easily.

(2) The "z" mark on the flat pack-IC indicates pin 1. (See Fig.

7) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. 8)

(3) Solder all pins of the flat pack-IC. Be sure that none of the

pins have solder bridges.

Example :

Pin 1 of the Flat Pack-IC is indicated by a " " mark.

Fig.7

1.2.5 Instructions for Handling Semi-conductors

Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during unpacking or repair work.

1.2.5.1 Ground for Human Body

Be sure to wear a grounding band (1MΩ) that is properly ground-

ed to remove any static electricity that may be charged on the body.

1.2.5.2 Ground for Workbench

(1) Be sure to place a conductive sheet or copper plate with

proper grounding (1MΩ) on the workbench or other sur-

face, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.

< Incorrect >

CBA

Presolder

Fig.8

CBA

< Correct >

Grounding Band

Flat Pack-IC

CBA

Conductive Sheet or Copper Plate

(No.YD087)1-7

1.3 PREPARATION FOR SERVICING

1.3.1 How to Enter the Service Mode

1.3.1.1 About Optical Sensors

Caution:

An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may operate erratically.

What to do for preparation

Insert a tape into the Deck Mechanism Assembly and press the PLAY button. The tape will be loaded into the Deck Mechanism Assembly. Make sure the power is on, connect TP507 (S-INH) to GND. This will stop the function of Tape Start Sensor, Tape End Sensor and Reel Sensors. (If these TPs are connected before plugging in the unit, the function of the sensors will stay valid.) See Fig. 1.

Q503

Q504

S-INH

TP501

Fig.1

Note:

Because the Tape End Sensors are inactive, do not run a tape all the way to the start or the end of the tape to avoid tape damage.

1-8 (No.YD087)

1.4 LASER BEAM SAFETY PRECAUTIONS

This DVD player uses a pickup that emits a laser beam.

Do not look directly at the laser beam coming from the pickup or allow it to strike against your skin.

The laser beam is emitted from the location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.

CAUTION:

Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.

Drive Mechanism Assembly

Laser Beam Radiation

Laser Pickup

Turntable

Location: Top of DVD mechanism.

(No.YD087)1-9

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-10 (No.YD087)

SECTION 3

DISASSEMBLY

3.1 CABINET DISASSEMBLY INSTRUCTIONS

3.1.1 Disassembly Flowchart

This flowchart indicates the disassembly steps to gain access to item(s) to be serviced. When reassembling, follow the steps in reverse order. Bend, route, and dress the cables as they were originally.

3.1.2 Disassembly Method

ID/

PART REMOVAL Loc. No.

Fig.

REMOVE/*UNHOOK/

No.

UNLOCK/RELEASE/

Note

UNPLUG/DESOLDER

[1] Top Cover 1 6(S-1) -

[2] Front Assembly 2 *5(L-1), *3(L-2),*CN1505 (1)

a) b) c)

[3] Front Bracket 2 2(S-2), (S-3), -

[4] Radiation Sheet 2 ---------- -

[5] Jack Bracket 3 2(S-4) -

[6] Front Jack CBA 3 Jack Earth Plate -

[7] DVD Mechanism&DVD

Main CBA Assembly

[8] Rear Panel Unit 5 2(S-6A), 2(S-6B),

4 2(S-5A), 2(S-5B),

*CN501, *CN601

3(S-7), (S-8A), (S-8B), *CN1503, *CN1504

[9] Power Supply CBA 6 4(S-9) -

[10] DC Fan Motor 6 2(S-10) -

[11] PCB Holder 6 3(S-11), Earth Plate -

[12] Rear Panel 6 ---------- -

[13] Bracket R 7 2(S-12) -

[14] VCR Chassis Unit 7 5(S-13), 3(S-14A),

2(S-14B), (S-15), (S-16)

[15] Deck Assembly 8 (S-17), (S-18), Desolder (2)

(3)

[16] Power SW CBA 8 Desolder -

[16] Power SW CBA

[14] VCR Chassis Unit

[18] Rear Jack CBA

[19] Main, AFV CBA

[10] DC Fan Motor

[8] Rear Panel Unit

[9] Power Supply CBA

[11] PCB Holder

ID/

PART REMOVAL Loc. No.

[20] Deck Pedestal

[15] Deck Assembly

[17] Function CBA

[2] Front Assembly

[1] Top Cover

[4] Radiation Sheet

[12] Rear Panel

Fig.

REMOVE/*UNHOOK/

No.

UNLOCK/RELEASE/

[6] Front Jack CBA

[5] Jack Bracket

[3] Front Bracket

[21] Front Bracket R

[7] DVD Mechanism & DVD Main CBA Assembly

[13] Bracket R

UNPLUG/DESOLDER

[17] Function CBA 8 Desolder -

[18] Rear Jack CBA 8 Desolder, Ground Plate -

[19] Main, AFV CBA 8 ---------- -

[20] Deck Pedestal 9 8(S-19) -

[21] Front Bracket R 9 (S-20) -

↓

(1)

↓

(2)

(3)

↓

(4)

Note:

(1) Identification (location) No. of parts in the figures (2) Name of the part (3) Figure Number for reference (4) Identification of parts to be removed, unhooked, un-

locked, released, unplugged, unclamped, or desoldered. P = Spring, L = Locking Tab, S = Screw, CN = Connector * = Unhook, Unlock, Release, Unplug, or Desolder e.g. 6(S-1) = six Screws (S-1), 5(L-1) = two Locking Tabs (L-1)

(5) Refer to "Reference Notes."

Note

↓

(5)

(No.YD087)1-11

3.1.2.1 Reference Notes

CAUTION :

Locking Tabs (L-1) and (L-2) are fragile. Be careful not to break them. (1)

a) Release five Locking Tabs (L-1). b) Release three Locking Tabs (L-2)

c) Disconnect Connector (CN1505), and remove the

Front Assembly.

(2) When reassembling, solder wire jumpers as shown in Fig.

(3) Before installing the Deck Assembly, be sure to place the

pin of LD-SW on Main CBA as shown in Fig. 8. Then, install the Deck Assembly while aligning the hole of Cam Gear with the pin of LD-SW, the shaft of Cam Gear with the hole of LD-SW as shown in Fig. 8.

(S-1)

[1] Top Cover

(S-1)

CN601

(S-5A)

[7] DVD Mechanism & DVD Main CBA Assemb ly

[5] Jac k Brac ket

Jack Earth Plate

Fig.3

CN501

(S-4)

[6] Fr ont Jack CBA

(S-5A)

(S-5B)

(S-2)

[3] Fr ont Brac ket

(L-2)

Fig.1

[4] Radiation Sheet

(S-2)

(S-3)

Fig.4

(L-1)

CN1505

[2] Fr ont Assemb ly

(L-1)

Fig.2

1-12 (No.YD087)

(S-7)

(S-8A)

(S-6A)

(S-14A)

(S-13)

(S-14A)

CN1503

Fig.5

(S-6B)

CN1504

(S-7)

[8] Rear Panel Unit

(S-8B)

(S-7)

(S-13)

(S-15)

(S-16)

[14] VCR Chassis Unit

(S-14B)

(S-12)

[13] Brac ket R

[10] DC Fan Motor

[9] Power Supply CBA

(S-9)

[12] Rear Panel

(S-9)

(S-11)

Earth Plate

Fig.7

(S-10)

(S-11)

[11] PCB Holder

Fig.6

(No.YD087)1-13

[15] Dec k Assemb ly

FE Head

[19] AFV CB A

[16] Power SW CBA

Cylinder Assembly

ACE Head Assembly

[18] Rear Jack CBA

SW507 LD-SW

Ground Plate

[19] Main CB A

Lead with blue stripe

(S-17)

Desolder

From Capstan Motor Assembly

Desolder from bottom

(S-18)

[17] Function CB A

Desolder

Lead with blue stripe

Printing side

[19] Main CBA

From ACE Head Assembly

Desolder

LD-SW

Lead with blue stripe

Desolder

[15] Dec k Assemb ly

Shaft

Hole

From Cylinder Assembly

From FE Head

Hole

Desolder

Lead with gray stripe

Cam Gear

[19] Main CB A

1-14 (No.YD087)

BOTTOM VIEW

Lead connections of Deck Assembly and Main CBA

Fig.8

(S-19)

[20] Dec k Pedestal

[21] Fr ont Brac ket R

(S-20)

Fig.9

(No.YD087)1-15

3.1.3 How to Eject Manually

3.1.3.1 Method 1

Note:

When servicing, do not touch white resin part as shown below. When rotating the gear, be careful not to damage the gear. (1) Remove the Top Cover. (2) Rotate the gear in the direction of the arrow manually as shown below.

Do not touc h!

View for A

Rotate this gear in the direction of the arrow

1-16 (No.YD087)

3.1.3.2 Method 2

Note:

When servicing, do not touch white resin part as shown below. (1) Remove the DVD Mechanism & DVD Main CBA Assembly. (2) Remove two screws, and remove the Insulating Plate.

Screw

Insulating Plate

(4) Release the other side of two Locking Tabs, and remove

the Clamper Assembly.

Clamper Assembly

Locking Tabs

(5) Remove the disc.

Do not touch!

(3) Release two Locking Tabs, and lift up one side of the

Clamper Assembly.

Clamper Assembly

Locking Tabs

Disc

(No.YD087)1-17

3.2 DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK MECHANISM

Before following the procedures described below, be sure to remove the deck assembly from the cabinet. (Refer to CABINET DISASSEMBLY INSTRUCTIONS.) All the following procedures, including those for adjustment and replacement of parts, should be done in Eject mode; see the positions of [44] and [45] in Fig.1 on page 1-20. When reassembling, follow the steps in reverse order.

STEP/ LOC. No.

*[22] [22] F Brake Assembly (HI) B 2,13 *(L-6)

STARTING No.

[1] [1] Guide Holder A T 3 2(S-1)

[2] [1] Cassette Holder Assembly T 4

[3] [2] Slider (SP) T 5 (S-1A), *(L-1)

[4] [2] Slider (TU) T 5 *(L-2)

[5] [4] Lock Lever T 5 *(L-3), *(P-1)

[6] [2] Cassette Plate T 5

[7] [7] Cylinder Assembly T 1,6 Desolder, 3(S-2)

[8] [8] Loading Motor Assembly T 1,7 Desolder, LDG Belt, 2(S-3)

[9] [9] ACE Head Assembly T 1,7 (S-4)

[10] [2] Tape Guide Arm Assembly T 1,8 *(P-2)

[11] [10] C Door Opener T 1,8 (S-4A), *(L-4)

[12] [11] Pinch Arm (B) T 1,8,9 *(P-3)

[13] [12] Pinch Arm (A) Assembly T 1,8,9

[14] [14] FE Head T 1,10 (S-5)

[15] [15] Prism T 1,10 (S-6)

[16] [2] Slider Shaft T 11 *(L-5)

[17] [16] C Drive Lever (SP) T 11

[18] [16] C Drive Lever (TU) T 11 (S-7), *(P-4)

[19] [19] Capstan Motor B 2,12 3(S-8), Cap Belt

[20] [20] Clutch Assembly (HI) B 2,13 (C-1)

[21] [20] Center Gear B 13

[23] [22] Worm Holder B 2,14 (S-9), *(L-7), *(L-8)

[24] [22] Pulley Assembly (HI) B 2,14

[25] [25] Mode Gear (LM) B 2,14 (C-2)

[26] [20],[25] Mode Lever (HI) B 2,14,15 (C-3)

[27] [22],[23],[26] Cam Gear (A) (HI) B 2,14,15 (C-4) (+)Refer to Alignment

[28] [26] TR Gear C B 2,14 (C-5)

[29] [28] TR Gear Spring B 14

[30] [29] TR Gear A/B B 14

[31] [31] FF Arm (HI) B 1,16

[32] [26] Idler Assembly (HI) B 1,16 *(L-9)

[33] [26] BT Arm B 2,16 *(P-5)

[34] [26] Loading Arm (SP)Assembly B 2,16 (+)Refer to Alignment

[35] [34] Loading Arm (TU) Assembly B 2,16 (+)Refer to Alignment

[36] [16],[26] M Brake (TU) Assembly (HI) T 1,17

[37] [2],[26] M Brake (SP)Assembly (HI) T 1,17 *(P-6)

PART REMOVAL INSTALLATION

Fig. No. REMOVE/*UNHOOK/

UNLOCK/RELEASE/ UNPLUG/DESOLDER

ADJUSTMENT CONDITION

Sec.Page 1-41

1-18 (No.YD087)

STEP/ LOC. No.

(1) Follow steps in sequence. When reassembling, follow the steps in reverse order.

(2) Indicates the part to start disassembling with in order to disassemble the part in column (1). (3) Name of the part (4) Location of the part: T=Top B=Bottom R=Right L=Left (5) Figure Number (6) Identification of parts to be removed, unhooked, unlocked, released, unplugged, unclamped, or desoldered.

(7) Adjustment Information for Installation

* [ 22 ] F Brake Assembly (HI) is not used in 2 head model.

STARTING No.

[38] [37] Tension Lever Assembly T 1,17

[39] [38] T Lever Holder T 17 *(L-10)

[40] [40] M Gear (HI) T 1,17 (C-6)

[41] [15],[40] Sensor Gear (HI) T 1,17 (C-7)

[42] [36],[40] Reel T T 1,17

[43] [38] Reel S T 1,17

[44] [34],[38] Moving Guide S Preparation T 1,18 (S-11), Slide Plate

[45] [35] Moving Guide T Preparation T 1,18

[46] [19] TG Post Assembly T 1,18 *(L-11)

[47] [27] Rack Assembly R 19 (+)Refer to Alignment

[48] [47] F Door Opener R 19

[49] [49] Cleaner Assembly T 1,6

[50] [49] CL Post T 6 *(L-12)

↓

(1)

These numbers are also used as identification (location) No. of parts in the figures.

P=Spring, W=Washer, C=Cut Washer, S=Screw, *=Unhook, Unlock, Release, Unplug, or Desolder e.g., 2(L-2) = two Locking Tabs (L-2).

(+):Refer to Deck Exploded Views for lubrication.

↓

(2)

PART REMOVAL INSTALLATION

(3)

Fig. No. REMOVE/*UNHOOK/

UNLOCK/RELEASE/ UNPLUG/DESOLDER

↓

(4)

↓

(5)

↓

(6)

ADJUSTMENT CONDITION

Sec.Page 1-41

↓

(7)

(No.YD087)1-19

Top View

[14]

[38]

[37]

[7] [49] [8]

[45][44] [46][9]

[32][43] [41] [40][31] [42]

[13]

[11]

[15]

[10] [12]

[36]

Bottom View

[23]

[24]

[27]

Fig.1

[19]

[35]

[34]

[25]

[26]

1-20 (No.YD087)

[33][20][28][22]

Fig.2

(S-1)

[1]

Fig.3

(S-1)

(S-1A)

[3]

[4]

(L-1)

(L-3)

[5]

(L-2)

[6]

(P-1)

Installation of [3] and [6]

First, insert [6] diagonally in [3] as shown below. Then, install [6] in [3] while pushing (L-1) in a direction of arrow. After installing [6] in [3], confirm that pin A of [3] enters hole A of [6] properly.

[3]

Pin D

Pin C

Slots B

First, while pushing the locking tab as shown in the right, slide and pull up the right side on [2] to release Pin A and Pin B from the slots A. Then, remove Pin C and Pin D on [2] from the slots B as shown.

[2]

Pull up

Pin A

Slide

Pin B

Slot A

Hole A

[6]

Pin A

View for A

(L-1)

Installation of [4] and [6]

Install [6] in [4] while pulling (L-2) in a direction of arrow. After installing [6] in [4], confirm that pin B of [4] enters hole B of [6] properly.

[4]

View for B

Hole B

Pin B

Fig.5

[6]

(L-2)

Locking tab

Fig.4

View for A

(No.YD087)1-21

[7]

[49]

(S-4A)

[11]

(L-4)

(P-3)

Desolder from bottom

(S-2)

View for A

Lead with Red Stripe

Fig.6

[50]

[13]

(L-12)

Removal of [11]

1) Remove screw (S-4A).

2) Unhook spring (P-2).

3) Release (L-4) while holding [12] with a finger.

4) Loosen a finger holding [12] and remove [11].

[10]

[12]

(P-2)

Pin of [12]

Pin of [10]

Groove of [27]

When reassembling [10] and [12], confirm that pin of [10] and pin of [12] are in the

[27]

groove of [27] as shown.

View for A

Fig.8

1-22 (No.YD087)

[9]

(S-4)

(S-3)

Fig.7

Desolder from bottom

Lead with White Stripe

LDG Belt

[8]

View for A

Installation of [13] and [12]

Hook spring (P-3) up to [12] and [13], then install them to the specified position so that [12] will be floated slightly while holding [12] and [13]. (Refer to Fig. A.)

Install pin of [12] in groove of [27]. (Refer to Fig. B.)

Groove of [27]

(P-3)

[13]

Fig. A

Pin of [12]

[27]

[12]

[14]

[17]

(L-5)

(S-5)

(S-6)

[15]

Fig.10

Fig. B (Top view)

Notch of

Press both [12] and [13] till the groove of chassis pin appears, and adjust [13] to the notch of chassis. Then turn [13] a little in the direction of the arrow while pressing [12]. (Refer to Fig. C.)

Install [11] and [10] while holding [12]. (Refer to Fig. 8.)

Fig.9

chassis

Groove of pin of chassis

Fig. C

[13]

turn

[12]

[16]

[18]

(P-4)

(S-7)

Fig.11

(No.YD087)1-23

Cap Belt

[19]

(S-8)

[22]

turn

(C-1)

[20]

(L-6)

[21]

Installation position of Cap Belt

[20] Cap Belt

View for A

Fig.12

[19]

Pin on [22]

[27]

Position of pin on [22]

Fig.13

1-24 (No.YD087)

[24]

(S-9)

(L-8)

(C-4)

(C-5)

[28]

[29]

[30]

[26]

(L-7)

[23]

(C-3)

(C-2)

[25]

Position of Mode Lever when installed

Pin of [36]

Bottom View

[27]

Installation of [26]

Pin of [33]

Align [26] and [27] as shown.

Pin of [37]

[26]

[27]

[31]

Fig.14

[33]

Top View

(P-5)

[32]

First groove on [27]

First tooth on [47]

[27]

When reassembling [27], meet the first groove on [27] to the first tooth on [47] as shown.

Fig.15

Refer to the Alignment Section, Page 1-41.

[35]

(L-9)

[34]

Fig.16

(No.YD087)1-25

[38]

(P-6)

[37]

(C-7)

[41]

[39]

turn

(C-6)

[40]

turn

[43]

(L-10)

Fig.17

[42]

[36]

turn

[48]

[47]

Slide

Fig.19

[44]

Slide Plate

(S-11)

[45]

[46]

(L-11)

Fig.18

1-26 (No.YD087)

SECTION 4

ADJUSTMENT

4.1 ELECTRICAL ADJUSTMENT INSTRUCTIONS

General Note: "CBA" is an abbreviation for "Circuit Board Assembly."

NOTE:

(1) Electrical adjustments are required after replacing circuit

components and certain mechanical parts. It is important to do these adjustments only after all repairs and replacements have been completed. Also, do not attempt these adjustments unless the proper equipment is available.

(2) To perform these alignment / confirmation procedures,

make sure that the tracking control is set inthe center position: Press either ”PR -” or “PR +” button on the front panel first, then the VCR ““button on the front panel.

4.1.1 Test Equipment Required

(1) Oscilloscope: Dual-trace with 10:1 probe,

V-Range: 0.001~50V/Div., F-Range: DC~AC-20MHz

(2) Alignment Tape (MHPE)

4.1.2 Head Switching Position Adjustment

Purpose:

To determine the Head Switching position during playback.

Symptom of Misadjustment:

May cause Head Switching noise or vertical jitter in the picture.

Test point Adj.P oint Mode Input

J236(JK1-V-OUT)

TP504(RF-SW)

GND

Tap e

MHPE Oscilloscope

Conne ctions of Measurement Equipment

Main CBA

VR501

(Switching Point)

(MAIN CBA)

Measu remen t

Equipme nt

J236

GND

TP504

PLAY

(SP)

(416µs±64µs)

Oscilloscope

CH1 CH2 Trig. (+)

-----

Spec.

6.5H±1H

Figur e 1

EXT. Syncronize Trigger Point

CH1

CH2

Reference Notes:

Playback the Alignment tape and adjust VR501 so that the Vsync front edge of the CH1 video output waveform is at the

6.5H±1H (416µs±64µs) delayed position from the rising edge

of the CH2 head switching pulse waveform.

1.0H

6.5H+/-1H (416µs+/-64µs)

Switching Pulse

0.5H V-Syn c

(No.YD087)1-27

4.2 STANDARD MAINTENANCE

4.2.1 Service Schedule of Components

This maintenance chart shows you the standard of replacement and cleaning time for each part. Because those may replace depending on environment and purpose for use, use the chart for reference.

h: Hours : Cleaning : Replace

Deck Periodic Service Schedule

Ref.No. Part Name 1,000 h 2,000 h 3,000 h 4,000 h

2 Loading Motor Assembly

9 ACE Head Assembly

57,58

12 Cap Belt

*13

*15 F Brake Assembly (HI)

16 Idler Assembly (HI)

26 M Brake (SP) Assembly (HI)

27 M Brake (TU) Assembly (HI)

Cylinder Assembly

Pulley Assembly

Tension Lever Assembly

Reel S, Reel T

Capstan Motor

FE Head

Pinch Arm Assembly

LDG Belt

Notes:

(1) Clean all parts for the tape transport (Upper Drum with Video Head / Pinch Roller / ACE Head / FE Head)using 90% ethyl

alcohol. (2) After cleaning the parts, do all DECK ADJUSTMENTS. (3) For the reference numbers listed above, refer to Deck Exploded Views.

* B73 ------ Recording model only

* B86 ------ Not used in 2 head model.

1-28 (No.YD087)

4.2.2 Cleaning

4.2.2.1 Cleaning of Video Head

Clean the head with a head cleaning stick or chamois cloth.

Procedure

(1) Remove the top cabinet. (2) Put on a glove (thin type) to avoid touching the upper and

lower drum with your bare hand.

(3) Put a few drops of 90% ethyl alcohol on the head clean-

ing stick or on the chamois cloth and, by slightly pressing it against the head tip, turn the upper drum to the right and to the left.

Notes:

(1) The video head surface is made of very hard material,

but since it is very thin, avoid cleaning it vertically.

(2) Wait for the cleaned part to dry thoroughly before oper-

ating the unit.

(3) Do not reuse a stained head cleaning stick or a stained

chamois cloth.

Do Not touch with your bare hand!

4.2.2.2 Cleaning of ACE Head

Clean the head with a cotton swab.

Procedure

(1) Remove the top cabinet. (2) Dip the cotton swab in 90% ethyl alcohol and clean the

ACE Head. Be careful not to damage the upper drum and other tape running parts.

Notes:

(1) Avoid cleaning the ACE Head vertically. (2) Wait for the cleaned part to dry thoroughly before oper-

ating the unit or damage may occur.

ACE Head

Upper Cylinder

Do Not !

Video Head

Cleaning Stick

(No.YD087)1-29

4.3 SERVICE FIXTURE AND TOOLS

Fig.1

Fig.2

Fig.4

Fig.5

Fig.3

Ref. No. Name Part No. Adjustment

1 Alignment Tape MHPE Head Adjustment of ACE Head

1 Alignment Tape MHPE-L

(4 Head model)

2 Guide Roller Adj. Screwdriver PTU94002 Guide Roller

3 Mirror Available Locally Tape Transportation Check

4 Azimuth Adj. Screwdriver + Available Locally ACE Head Height

5 Flat Screwdriver - Available Locally X Value

1-30 (No.YD087)

Azimuth and X Value Adjustment of ACE Head / Adjustment of Envelope Waveform

+ 69 hidden pages