Panasonic NV-SJ30AM User manual

ORDERNO. VRD0206026C8

Video Cassette Recorder

NV-SJ30AM / NV-SJ30EU / NV-SJ30PMP / NV-SJ50AM / NV-

SJ50AU / NV-SJ50EU

R4-MECHANISM

SPECIFICATIONS

Unauthorized copying and distribution isaviolation of law.

1. INTRODUCTION

This service manual contains technical information whichwill allowservice personnel to

understand and service this model.

If the circuit is changedormodified, this information will be followedbysupplementaryservice

manual tobe filedwithoriginal service manual.

Note:

1. Adjustment procedures, DisassemblyProcedures and Assembly

Procedures for Mechanism Chassisare separate volume from this

service manual.

Please refer to the service manual for R4-Mechanism Chassis.

(Order No. VRD0202010C8)

2. The Model No. isindicated on the SchematicDiagram and Circuit

Board Diagrams as follows.

Model No. Indication Mark

NV-SJ30PMP (A)

NV-SJ30AM (B)

NV-SJ30EU (C)

NV-SJ50AM (D)

NV-SJ50AU/EU (E)

2. GENERAL DESCRIPTIONS

2.1. SERVICECAUTION

2.1.1. REPLACING THE EEPROM IC6002

NOTE:

The EEPROM IC6002 store the PG shifterdata and the operation setting datas.

Therefore afterreplacing IC6002, PG shifteradjustment shouldbe performed.

(Refertothe Electric Adjustment Procedures)

2.1.2. CHECKING OFMAIN C.B.A.

Whenservicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanismfromthe frame and

turnover.

Fig. S1

2.1.3. REMOVALOFCASSETTE TAPE

Whenthe cassette tape couldnot be uninstalledfromanelectrical malfunction, There are 2

ways toremove a cassette tape.

1. Removal bycompulsoryunloading.

A. Press FF and EJECTbutton simultaneouslymore 3times to set

the Service Mode to 7.

InthisService Mode 7, the LEDsare illuminated as follows.

Fig. S2

B. Press STOPbutton inorder to unload the mechanism. (Pay

attention of tape slack)

2. Removal bymanual operation byrotating the Loading Motor with

the batteries.

A. Disconnect the AC plug, and remove the Top Panel and the

Front Panel byreferring the DisassemblyProcedures.

B. Connect three batteries (1.5V spec.)to the Loading Motor in

series for supplying 4.5V to rotate the Loading Motor following

Fig. S3.

Fig. S3

C. Stop unloading just before unloading wouldbe completed as

shownin Fig. S4.Fig. S4

D. Then the tape becomes slack as shownin Fig. S5.

Fig. S5

E. Rotate the S-Reel byasmall minus screwdriver (Fig. S6)to

remove the tape slacks as shownin Fig. S7.

Fig. S6

Fig. S7

F. Then unload againto remove the cassette tape as shownin Fig.

S8.Fig. S8

3. Removal bymanual operations after uninstalling the mechanism.

A. Disconnect the AC plug, and remove the Top Panel, Front

Panel and the Mechanism byreferring the Disassembly

Procedures.

B. Remove the Screw (S1) and remove the Loading Motor both

shownin Fig. S9.Fig. S9

C. Rotate the MainCam Gear counter-clockwise (Fig. S10)until

just before the unloading wouldbe completed as shownin Fig.

S4.

D. Rotate the Capstan Motor clockwise (Fig. S10)to remove the

tape slacks as shownin Fig. S7.

Fig. S10

E. Rotate the MainCam Gear counter-clockwise again(Fig. S10)to

remove the cassette-tape as shownin Fig. S8.

F. Set the Position Switch to EJECTPOSITIONcertainlyas shown

in Fig. S11.Fig. S11

G. Install the Loading Motor and tighten screw (S1) as shownin

Fig. S9.

2.1.4. CYLINDER UNITREPLACEMENT

NOTE:

Replacing onlyUpperCylinderunit of R4 Mechanismcannot be performed, as securing of RT

gapis impossible out of factory, please replace the cylinderbywhole CylinderUnit. The PG

ShifterAdjustment shouldbe performedafterreplacement of theDD CylinderUnit.

1. Remove the Mechanism Unitfrom MainC.B.A./Chassisby

referring "DisassemblyProcedure".

2. Unlock 2locking tabs on aside to release the Cylinder Flexible

Card as shownin Fig. S12.

CAUTION:

Handlethe Cylinder FlexibleCard with care. When itdamaged,

you shouldreplace itwith anew Cylinder Unit.

3. Remove ared Screw (S2) and 2goldScrews(S3) to remove the

Cylinder Unitshownin Fig. S12.

Fig. S12

NOTE:

Whenreassembling, perform the steps inthe reverse order, and perform the PG SHIFTER

ADJUSTMENTcertainlyafterCYLINDER UNITREPLACEMENT.

2.1.5. FLATCARD CABLE INSTALLATION

Wheninstalling the Flat CardCable on the connector, install the Flat CardCable withthe cable

contacts facing the connectorcontacts.

Fig. S13

2.1.6. SERVICE MODE

1. Purpose of Service Mode

Thisservice mode allow the service Technicians to check the VCR

mechanism freelywithout acassette tape, which enables

accessing faultymechanical part quicklyand shortening total

repairtime.

2. Turning on Service Mode

Inthe service mode, twotypes of checking modes are availableas

follows:

Bypressing the FF and EJECTbuttons simltaneouslyfor 3

seconds, the service mode 1will be activated.

-Mode 1:

For checking Tape Transport mechanism.

Incassette downcondition with cassette tape, the mechanism

goes to PLAY, REV, CUE, FF or REW position when the

operation button ispressed.

Inthismode, LEDsare illuminated as follows:

Thisservice mode 1isreleased when pressing the FF and EJECT

buttons simltaneouslymore 4times.

Fig. S14

Bypressing the FF and EJECTbuttons simltaneouslymore 3

times from service mode 1, the service mode 7will be activated.

-Mode 7:

For checking loading/unloading operation.

The loading motor rotates for loading operation when the

PLAYbutton ispressed.

The loading motor rotates for unloading operation when the

STOPbutton ispressed.

Inthismode, LEDsare illuminated as follows:

Fig. S15

Thisservice mode 7isreleased when pressing the FF and EJECT

buttons simltaneouslymore once.

2.2. SELF-DIAGNOSIS&SERVICEINFORMATIONDISPLAY

This model does not have Self-Diagnosis & Service Information Displayfunction.

2.3. INTRODUCTIONOFVIDEO HEAD CLEANING CASSETTE /

(POLISHING TYPE)

1. We are pleased to introduce PanasonicVideo Head Cleaning

Cassette, VFK0923FT [for service purposes] and VFK0923FSE [

for end users] for all VHS/S-VHSVCPand VCR.

2. These cleaning cassettes are exclusive removing the hard and

stickyclogging on video heads.

3. These improve the efficiencyof video head cleaning service and

shortening cleaning time for end users.

VFK0923FT

(ForService usage)

Type of Cassette Full VHS Cassette

Cleaning Time 10 Seconds/Time

Tape Length 20 m

Usabilityina Path 180 Times

VFK0823FSE

(Forend users)

Type of Cassette Full VHS Cassette

Cleaning Time 10 Seconds/Time

Tape Length 3.34 m

Usabilityina Path 30 Times

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