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
2002 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
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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
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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.
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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
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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
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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
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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.
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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
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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.
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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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