JVC AV-20FD24 Service Manual

SERVICE MANUAL

TV/DVD COMBO

AV-20FD24

POWER

TV CATV

DISPLAY

PLAY MODE

SLEEP TIMER

AUDIO

TITLE

123

SUBTITLE

456

JUMP

789

C.C.

RETURN

ANGLE

MARKER ZOOM

REPEATA-BRETURN

–

SLOW

CANCEL

LIGHT

SELECT

MUTING

/ENTER

VOL–VOL

INPUT

–

DVD SETUP

TV MENU

DVD MENUTV/DVDNEXTPREV

B.SEARCH F.SEARCHPLAY

PAUSE/STILLSTOP

OPEN/CLOSE

TV / DVD

CONTENTS

q SPECIFICATIONS.............................................................................................................................................. 2

q OPERATING!INSTRUCTIONS!(APPENDIX)

q SAFETY!PRECAUTIONS .................................................................................................................................. 3

q SPECIFIC!SERVICE!INSTRUCTIONS .............................................................................................................. 7

q SERVICE!ADJUSTMENTS .............................................................................................................................. 19

q GUIDE!FOR!REPAIRING ................................................................................................................................. 25

q STANDARD!CIRCUIT!DIAGRAM ................................................................................................................... 2-1

q PARTS!LIST ..................................................................................................................................................... 37

No. 52133

2003/06

AV-20FD24

SPECIFICATIONS

TELEVISION

Picture Tube: 20” (measured diagonally) Color System: NTSC TV RF System: US System M Tuner Type: Quartz PLL Frequency Synthesized Receiving Channels: VHF 2-13

UHF 14-69 CATV 14-36 (A)-(W)

37-59 (AA)-(WW) 60-85 (AAA)-(ZZZ) 86-94 (86)-(94) 95-99 (A-5)-(A-1) 100-125 (100)-(125) 01 (5A)

Intermediate Frequency: Picture (FP) : 45.75 MHz

Sound (FS) : 41.25 MHz

FP-FS : 4.50 MHz Antenna Input: VHF/UHF In 75 ohms coaxial, F-Type Connector Speaker: 1.8” x 3.9”, 8 ohms x 2 Audio Output Power: 2.5 W + 2.5 W

DVD/CD!PLAYER

Color System: NTSC Applicable Disc: DVD (120 mm, 80 mm)

CD-DA (120 mm, 80 mm)

CD-R/RW (120 mm, 80 mm) Pick up: 1-Lens, 2-Beams System

CD : Wavelength : 775 - 815 nm

Maximum output power : 0.5 mW

DVD : Wavelength : 650 - 666 nm

Maximum output power : 2.0 mW

Frequency Response: DVD : 4 Hz – 22 kHz

CD : 4 Hz – 20 kHz Audio DAC: 192 kHz/24 bit

GENERAL

Power Source: 120 V AC, 60 Hz Power Consumption: 115 Watts Dimensions(W x H x D): 574 mm x 514.5 mm x 483 mm Weight: 56.1 Ibs/25.5 kg Inputs/Outputs: Video input: 1.0 Vp-p, 75 ohm (RCA pin jack)

Audio input: -8 dBm, 50 kohm (RCA pin jack)

Digital Audio output (DVD only): 0.5 Vp-p, 75 ohm (Coaxial) Headphone Jack: 3.5 mm mini-jack Storage Temperature -20 °C ~ 60 °C Operating Temperature 5 °C ~ 40 °C

Accessories:

Remote Control X 1 Batteries (UM-3) X 2

Design!&!specification!are!subject!to!change!without!notice.

No. 52133

SAFETY!PRECAUTIONS

CAUTION

THIS DIGITAL VIDEO PLAYER EMPLOYS A LASER SYSTEM.

TO ENSURE PROPER USE OF THIS PRODUCT, PLEASE READ THIS SERVICE MANUAL CAREFULLY AND RETAIN FOR FUTURE REFERENCE. SHOULD THE UNIT REQUIRE MAINTENANCE, CONTACT AN AUTHORIZED SERVICE LOCATION-SEE SERVICE PROCEDURE.

USE OF CONTROLS, ADJUSTMENTS OR THE PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

TO PREVENT DIRECT EXPOSURE TO LASER BEAM, DO NOT TRY TO OPEN THE ENCLOSURE. VISIBLE LASER RADIATION MAY BE PRESENT WHEN THE ENCLOSURE IS OPENED. DO NOT STARE INTO BEAM.

Location of the required Marking

The rating sheet and the safety caution are on the rear of the unit.

AV-20FD24

CERTIFICATION: COMPLIES WITH FDA RADIATION PERFORMANCE STANDARDS, 21 CFR SUBCHAPTER J.

No. 52133

AV-20FD24

IMPORTANT!SERVICE!SAFETY!INFORMATION

Operating the receiver outside of its cabinet or with its back removed involves a shock hazard. Work on these models should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment.

Exercise care when servicing this chassis with power applied. Many B plus and high voltage RF terminals are exposed which, if carelessly contacted, can cause serious shock or result in damage to the chassis. Maintain interconnecting ground lead connections between chassis, escutcheon, picture tube dag and tuner cluster when operating the chassis.

These receivers have a "polarized" AC line cord. The AC plug is designed to fit into standard AC outlets in one direction only. The wide blade connects to the "ground side" and the narrow blade connects to the "hot side" of the AC line. This assures that the TV receiver is properly grounded to the house wiring. If an extension cord must be used, make sure it is of the "polarized" type.

Since the chassis of this receiver is connected to one side of the AC supply during operation, service should not be attempted by anyone not familiar with the precautions necessary when working on these types of equipment.

When it is necessary to make measurements or tests with AC power applied to the receiver chassis, an Isolation Transformer must be used as a safety precaution and to prevent possible damage to transistors. The Isolation Transformer should be connected between the TV line cord plug and the AC power outlet.

Certain HV failures can increase X-ray radiation. Receivers should not be operated with HV levels exceeding the specified rating for their chassis type. The maximum operating HV specified for the chassis used in these receivers is 32kV±1.0kV at zero beam current with a line voltage of 120V AC. Higher voltage may also increase the possibility of failure in the HV supply.

It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the receiver that could cause a rise in high voltage, or operating supply voltages. No changes should be made to the original design of the receiver.

Components shown in the shaded areas on the schematic diagram and/or identified by ! in the replacement parts list should be replaced only with exact factory recommended replacement parts. The use of unauthorized substitute parts may create shock, fire, Xray radiation, or other hazards.

The picture tube used in this receiver employs integral implosion protection. Replace with a tube of the same type number for continued safety. Do not lift picture tube by the neck. Handle the picture tube only when wearing shatterproof goggles and after discharging the high voltage completely. Keep others without shatterproof goggles away.

When removing springs or spring mounted parts from the tuner, tuner cluster or chassis, shatterproof goggles must be worn. Keep others without shatterproof goggles away.

Before returning the receiver to the user, perform the following safety checks:

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the receiver.

2. Replace all protective devices such as nonmetallic control knobs, insulating fishpapers, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

3. To be sure that no shock hazard exists, a check for the presence of leakage current should be made at each exposed metal part having a return path to the chassis (antenna, cabinet metal, screw heads, knobs and/or shafts, escutcheon, etc.) in the following manner.

Plug the AC line cord directly into a 120V AC receptacle. (Do not use an Isolation Transformer during these checks.) All checks must be repeated with the AC line cord plug connection reversed. (If necessary, a nonpolarized adapter plug must be used only for the purpose of completing these checks.)

If available, measure current using an accurate leakage current tester. Any reading of 0.35mA or more is excessive and indicates a potential shock hazard which must be corrected before returning the receiver to the owner.

If a reliable leakage current tester is not available, this alternate method of measurement should be used. Using two clip leads, connect a 1500 ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with a known earth ground, such as a water pipe or conduit and the metal part to be checked. Use a VTVM or VOM with 1000 ohms per volt, or higher, sensitivity to measure this AC voltage drop across the resistor. Any reading of

0.35 volt RMS or more is excessive and indicates a potential shock

hazard which must be corrected before returning the receiver to the owner.

To determine the presence of high voltage, use an accurate high impedance HV meter connected between the second anode lead and the CRT dag grounding device. When servicing the High Voltage System, remove static charges from it by connecting a 10k ohm resistor in series with an insulated wire (such as a test probe) between the picture tube dag and 2nd anode lead (have AC line cord disconnected from AC supply).

No. 52133

TO EXPOSED METAL PARTS

VT VM

AC SCALE

1.5K OHMS 10W

15µF TEST PROBE

TO KNOWN EARTH GROUND

AV-20FD24

IMPORTANT!SAFEGUARDS

1. READ!INSTRUCTIONS

All the safety and operating instructions should be read before the unit is operated.

2. RETAIN!INSTRUCTIONS

The safety and operating instructions should be retained for future reference.

3. HEED!WARNINGS

All warnings on the unit and in the operating instructions should be adhered to.

4. FOLLOW!INSTRUCTIONS

All operating and use instructions should be followed.

5. CLEANING

Unplug this unit from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for cleaning.

6. ATTACHMENTS

Do not use attachments not recommended by the unit’s manufacturer as they may cause hazards.

7. WATER!AND!MOISTURE

Do not use this unit near water. For example, near a bathtub, washbowl, kitchen sink, or laundry tub, in a wet basement, or near a swimming pool.

8 ACCESSORIES

Do not place this unit on an unstable cart, stand, tripod, bracket, or table. The unit may fall, causing serious injury, and serious damage to the unit. Use only with a cart, stand, tripod, bracket, or table recommended by the manufacturer.

8A. An appliance and cart combination should be moved with care. Quick stops, excessive force, and

uneven surfaces may cause the appliance and cart combination to overturn.

9. VENTILATION

Slots and openings in the cabinet and in the back or bottom are provided for ventilation, to ensure reliable operation of the unit, and to protect it from overheating. These openings must not be blocked or covered. The openings should never be blocked by placing the unit on a bed, sofa, rug, or other similar surface. This unit should never be placed near or over a radiator or heat source. This unit should not be placed in a built-in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer’s instructions have been adhered to.

10. POWER!SOURCES

This unit should be operated only from the type of power source indicated on the rating plate. If you are not sure of the type of power supply to your home, consult your appliance dealer or local power company. For units intended to operate from battery power, or other sources, refer to the operating instructions.

11. GROUNDING!OR!POLARIZATION

This unit is equipped with a polarized alternating-current line plug (a plug having one blade wider than the other). This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the polarized plug. If your unit is equipped with a 3-wire grounding-type plug, a plug having a third (grounding) pin, this plug will only fit into a grounding-type power outlet. This too, is a safety feature. If you are unable to insert the plug into the outlet, contact your electrician to replace your obsolete outlet. Do not defeat the safety purpose of the grounding-type plug.

12. POWER-CORD!PROTECTION

Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

13. LIGHTNING

To protect your unit from a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the unit due to lightning and power line surges.

14. POWER!LINES

An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits, or where it can fall into such power lines or circuits. When installing an outside antenna system, extreme care should be taken to keep from touching such power lines or circuits, as contact with them might be fatal.

15. OVERLOADING

Do not overload wall outlets and extension cords, as this can result in a risk of fire or electric shock.

16. OBJECT!AND!LIQUID!ENTRY

Do not push objects through any openings in this unit, as they may touch dangerous voltage points or short out parts that could result in fire or electric shock. Never spill or spray any type of liquid into the unit.

17. OUTDOOR!ANTENNA!GROUNDING

If an outside antenna or cable system is connected to the unit, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges. Section 810 of the National Electrical Code, ANSI/NFPA 70, provides information with respect to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna discharge unit, connection to grounding electrodes, and requirements for the grounding electrode.

18. SERVICING

Do not attempt to service this unit yourself as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.

PORTABLE CART WARNING

(symbol provided by RETAC)

S3126A

No. 52133

AV-20FD24

19. DAMAGE!REQUIRING!SERVICE

Unplug this unit from the wall outlet and refer servicing to qualified service personnel under the following conditions:

a. When the power-supply cord or plug is damaged. b. If liquid has been spilled, or objects have fallen into the unit. c. If the unit has been exposed to rain or water. d. If the unit does not operate normally by following the operating instructions. Adjust only those controls that are covered by the

operating instructions, as an improper adjustment of other controls may result in damage and will often require extensive work by a

qualified technician to restore the unit to its normal operation. e. If the unit has been dropped or the cabinet has been damaged. f. When the unit exhibits a distinct change in performance, this indicates a need for service.

20. REPLACEMENT!PARTS

When replacement parts are required, be sure the service technician uses replacement parts specified by the manufacturer or those that have the same characteristics as the original parts. Unauthorized substitutions may result in fire, electric shock or other hazards.

21. SAFETY!CHECK

Upon completion of any service or repairs to this unit, ask the service technician to perform safety checks to determine that the unit is in proper operating condition.

22. WALL!OR!CEILING!MOUNTING

The product should be mounted to a wall or ceiling only as recommended by the manufacturer.

23. HEAT

The product should be situated away from heat sources such as radiators, heat registers, stoves, or other products (including amplifiers) that produce heat.

24. DISC!TRAY

Keep your fingers well clear of the disc tray as it is closing. It may cause serious personal injury.

25. CONNECTING

When you connect the product to other equipment, turn off the power and unplug all of the equipment from the wall outlet. Failure to do so may cause an electric shock and serious personal injury. Read the owner's manual of the other equipment carefully and follow the instructions when making any connections.

26. SOUND!VOLUME

Reduce the volume to the minimum level before you turn on the product. Otherwise, sudden high volume sound may cause hearing or speaker damage.

27. SOUND!DISTORTION

Do not allow the product output distorted sound for a longtime. It may cause speaker overheating and fire.

28. HEADPHONES

When you use the headphones, keep the volume at a moderate level. If you use the headphones continuously with high volume sound, it may cause hearing damage.

29. LEASER!BEAM

Do not look into the opening of the disc tray or ventilation opening of the product to see the source of the laser beam. It may cause sight damage.

30. DISC

Do not use a cracked, deformed, or repaired disc. These discs are easily broken and may cause serious personal injury and product malfunction.

31. NOTE!TO!CATV!SYSTEM!INSTALLER

This reminder is provided to call the CATV system installer’s attention to Article 820-40 of the NEC that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical.

EXAMPLE OF ANTENNA GROUNDING AS PER THE NATIONAL ELECTRICAL CODE

ELECTRIC SERVICE

EQUIPMENT

NEC-NATIONAL ELECTRICAL CODE

S2898A

ANTENNA LEAD IN WIRE

GROUND CLAMP

ANTENNA DISCHARGE UNIT (NEC SECTION 810-20)

GROUNDING CONDUCTORS (NEC SECTION 810-21)

GROUND CLAMPS

POWER SERVICE GROUNDING ELECTRODE SYSTEM (NEC ART 250, PART H)

No. 52133

SPECIFIC!SERVICE!INSTRUCTIONS

DISASSEMBLY!INSTRUCTIONS

AV-20FD24

1. REMOVAL!OF!MECHANICAL!PARTS AND!P.C.!BOARDS

1-1:!BACK!CABINET!(Refer!to!Fig.!1-1)

1. Remove the 7 screws 1.

2. Remove the screw 2 which are used for holding the Back

Cabinet.

3. Remove the AC cord from the AC cord hook 3.

4. Remove the Back Cabinet in the direction of arrow.

Front Cabinet

1-2:!CRT!PCB!(Refer!to!Fig.!1-2)

CAUTION: BEFORE!REMOVING!THE!ANODE!CAP,!DISCHARGE

ELECTRICITY!BECAUSE!IT!CONTAINS!HIGH VOLTAGE. BEFORE!ATTEMPTING!TO!REMOVE!OR!REPAIR ANY!PCB,!UNPLUG!THE!POWER!CORD!FROM!THE AC!SOURCE.

1. Remove the Anode Cap.

(Refer to REMOVAL OF ANODE CAP)

2. Disconnect the following connector:

(CP801).

3. Remove the CRT PCB in the direction of arrow.

Front Cabinet

Back Cabinet

Fig. 1-1

CRT PCB

CP805

1-3:!AV!PCB/DVD!BLOCK!(Refer!to!Fig.!1-3)

1. Remove the 2 screws 1.

2. Disconnect the following connectors: (CP104, CP301, CP302, CP401 and CP3800).

3. Remove the AV PCB/DVD Block in the direction of arrow.

Front Cabinet

CP104

CP3800

CP301

AV PCB/DVD Block

CP302

1-4:!DVD!BLOCK!(Refer!to!Fig.!1-4)

1. Remove the 11 screws 1.

2. Remove the Top Shield in the direction of arrow (A).

3. Disconnect the following connectors: (CP8001 and CP8002).

4. Remove the 4 screws 2.

5. Remove the DVD Block in the direction of arrow (B).

6. Remove the 2 screws 3.

7. Remove the Jack Shield.

8. Remove the AV PCB in the direction of arrow (C).

(A)

AV PCB

Jack Shield

CP8001

CP8002

Top Shield

DVD Block

(B)

(C)

CP401

Fig. 1-3

Fig. 1-2

No. 52133

Plate Bottom

Fig. 1-4

AV-20FD24

1-5:!DVD!PCB/DVD!DECK!(Refer!to!Fig.!1-5)

1. Make the short circuit on the position as shown Fig.!1-5 using a soldering. If you remove the DVD Deck with no soldering, the Laser may be damaged.

2. Unlock the 2 supports 1.

3. Remove the Front Tray Plate in the direction of arrow (A).

4. Disconnect the following connectors: (CP2001, CP2301 and CP2302).

5. Remove the 4 screws 2.

6. Remove the DVD Deck in the direction of arrow (B).

7. Remove the 4 screws 3.

8. Remove the DVD PCB in the direction of arrow (C).

Deck CD

(A)

DVD PCB

CP2301

Front Tray Plate

(B)

(C)

Make the sort circuit using a soldering.

CP2001

CP2302

Pick Up PCB

Deck Angle

Fig. 1-5

NOTE

When the installation of the DVD Deck, remove all the soldering on the short circuit position after the connection of Pick Up PCB and DVD PCB connector.

No. 52133

AV-20FD24

2. REMOVAL!OF!DVD!DECK!PARTS

NOTE

1. Do not disassemble the DVD DECK PARTS except listedparts here. Minute adjustments are needed if the disassemble is done. If the repair is needed except listed parts, replace the DVD MECHA ASS’Y.

2-1:!TRAY!(Refer!to!Fig.!2-1-A)

1. Set the Tray opened. (Refer!to!the!DISC!REMOVAL!METHOD AT!NO!POWER!SUPPLY)

2. Unlock the support 1 and remove the Tray.

Tray

NOTE

1. In case of the Tray installation, install them as the circled section of Fig. 2-1-B so that the each markers are met.

Tray

Main Frame Ass’y

Fig. 2-1-A

Main Chassis Ass’y

Rack Loading

Move it to the direction of the arrow.

Main Frame Ass’y

Check Lock

Fig. 2-2-B

2-3: RACK!LOADING/MAIN!GEAR/!RACK!LOADING!SPRING

(Refer!to!Fig.!2-3)

1. Remove the Rack L Spring.

2. Press down the catcher 1 and slide the Rack Loading.

3. Remove the Rack Loading, Rack Loading Spring and Main Gear.

Rack Loading

Rack Loading Spring

Rack L Spring

Main Gear

Main Frame

Ass’y

Fig. 2-1-B

2-2:!MAIN!CHASSIS!ASS’Y!(Refer!to!Fig.!2-2-A)

1. Remove the Main Chassis Ass’y from the Insulator (R).

2. Unlock the support 1.

3. Remove the Main Chassis Ass’y.

Insulator (R) (Green)

Main Frame Ass’y

Main Chassis

Ass’y

Fig. 2-2-A

NOTE

1. In case of the Main Chassis Ass’y, install it from (1) to (6) in order. (Refer!to!Fig.!3-2-B)

Main Frame Ass’y

Fig. 2-3

2-4:!CLAMPER!ASS’Y/INSULATOR(R)/LEVER!SWITCH

(Refer!to!Fig.!2-4-A)

1. Remove the screw 1.

2. Remove the Lever Switch.

3. Remove the 2 Insulator (R).

4. Press the Clamper and rotate the Clamper Plate clockwise, then unlock the 3 supports 2.

5. Remove the Clamper Plate, Clamper Magnet and Clamper.

Insulator (R)

Clamper Plate

Clamper Magnet

Lever Switch

(Green)

Insulator (R) (Green)

Clamper

Main Frame

Fig. 2-4-A

No. 52133

AV-20FD24

NOTE

1. When installing the Clamper Magnet, install it with the green face up.

2. When installing the wire of the Lever Switch, install it correctly as Fig. 2-4-B.

3. When installing the Lever Switch, install it correctly as Fig. 2-4-C.

4. In case of the Lever Switch installation, hook the wire on the Main Frame as shown Fig. 2-4-D.

Lever Switch

Red

White

Blue

From DVD PCB

Fig. 2-4-B

The Lever should be position

The Lever should be position between A and B.

between A and B.

Rack Loading

Fig. 2-4-C

Main Chassis Ass’y

raverse Holder

Fig. 2-5-B

2-6:!SWITCH!PCB!ASS’Y!(Refer!to!Fig.!2-6-A)

1. Remove the screw 1.

2. Remove the Switch PCB Ass’y.

Switch PCB Ass’y

Main Chassis Ass’y

• Screw Torque: 4 ±

0.5kgf•cm

Fig. 2-6-A

NOTE

1. When installing the wire of the Switch PCB, install it correctly as Fig. 2-6-B.

2-5:!TRAVERSE!HOLDER/INSULATOR!(F)

(Refer!to!Fig.!2-5-A)

1. Remove the Traverse Holder.

2. Remove the 2 Insulator (F).

Main Chassis Ass’y

Insulator (F) (Black)

Traverse Holder

Insulator (F) (Black)

Lever Switch

Fig. 2-4-D

Fig. 2-5-A

Switch PCB Ass’y

Black

From Relay PCB

White

Fig. 2-6-B

2-7:!RACK!FEED!ASS’Y!(Refer!to!Fig.!2-7-A)

1. Remove the screw 1.

2. Remove the Rack Feed 1/2 Spring, Rack Feed 1/2 and Rack Feed Lever.

Rack Feed 2

Rack Feed 1 Spring

Rack Feed 2 Spring

Rack Feed Lever

Rack Feed 1

Main Chassis

Ass’y

NOTE

1. After the installing of the Traverse Holder, check if the wire is like Fig. 2-5-B.

No. 52133

• Screw Torque: 3.5 ± 0.5kgf•cm

Fig. 2-7-A

AV-20FD24

NOTE

1. After the assembly of the Rack Feed, check if the Rack Feed 1/2 is moving smoothly.!(Refer!to!Fig.!2-7-B)

2. In case of the Rack Feed AssÅfy installation, install correctly as Fig. 2-7-C.

Moving smoothly

Check the position of the Rack Feed Lever

Should not be engaged.

Fig. 2-7-B

Fig. 2-7-C

2-8:!RELAY!PCB!ASS’Y!(Refer!to!Fig.!2-8-A)

1. Remove the screw 1.

2. Remove the Relay PCB Ass’y.

2-9:!GEAR!(Refer!to!Fig.!2-9-A)

1. Unlock the support 1.

2. Remove the Middle Gear 1/2/3, Idler Gear and Feed Gear.

Middle Gear 2

Middle Gear 1

Middle Gear 3

Idler Gear

Main Chassis

Ass’y

Feed Gear

Fig. 2-9-A

NOTE

1. In case of the Idler Gear installation, install correctly as Fig. 2-9B.

2. When installing the Middle Gear 2, check if the Middle Gear 2 is locked correctly as Fig. 2-9-C.

[OK]

Idler Gear

[NG]

Idler Gear

Main Chassis Ass’y

Relay PCB Ass’y

• Screw Torque: 4 ± 0.5kgf•cm

Fig. 2-8-A

NOTE

1. When installing the wire of the Relay PCB, install it correctly as Fig. 2-8-B.

Idler Arm

Check Lock

Middle Gear 2

2-10:!IDLER!ARM!(Refer!to!Fig.!2-10-A)

1. Remove the Idler Arm Spring.

2. Remove the Chassis Spring.

3. Remove the Idler Arm.

Idler Arm Spring

Idler Arm

Fig. 2-9-B

Fig. 2-9-C

Fig. 2-8-B

No. 52133

Main Chassis Ass’y

Chassis Spring

Fig. 2-10-A

AV-20FD24

NOTE

1. In case of the Idler Arm installation, install as the circled section of Fig. 2-10-B.

2. In case of the Idler Arm Spring installation, install as the circled section of Fig. 2-10-C.

3. In case of the Chassis Spring installation, install as the circled section of Fig. 2-10-D.

Idler Arm

Main Chassis Ass’y

Fig. 2-10-B

Idler Arm Spring

Main Chassis Ass’y

Motor Gear

Feed Motor

• Screw Torque: 1 ± 0.5kgf•cm

Fig. 2-11-A

NOTE

1. In case of the Motor Gear installation, check if the valueof the Fig. 2-11-B is correct.

2. When installing the Feed Motor, check if the cable is positioned as Fig. 2-11-C.

Motor Gear

Feed Motor

6.1 ± 0.1mm

Main Chassis Ass’y

Main Chassis

Ass’y

2-11:!FEED!MOTOR!(Refer!to!Fig.!2-11-A)

1. Remove the 2 screws 1.

2. Remove the Feed Motor.

3. Remove the Motor Gear.

Fig. 2-10-C

Chassis Spring

Fig. 2-10-D

Safety surface for pressing of the insert.

Main Chassis Ass’y

Pass the cable between 2 pins.

Fig. 2-11-B

Feed Motor

Fig. 2-11-C

No. 52133

+ 25 hidden pages