Panasonic NV-SJ400A User manual

ORDERNO. VRD0006020C3
Video Cassette Recorder
NV-SJ400A / NV-SJ200A
Z-MECHANISM
SPECIFICATIONS
2000 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 Z-
Mechanism Chassis. (Order No. VRD9802005C2)
2. The Model No. isindicated on the SchematicDiagram and Circuit
Board Diagrams as follows.
Model No. Indication Mark
NV-SJ400A (SJ400)
NV-SJ200A (SJ200)
2. GENERAL DESCRIPTIONS
2.1. SERVICEINFORMATION
2.1.1. MICROPROCESSOR RESET
Whenthe MicroprocessorIC6001, MAIN C.B.A. and/orBack-up BatteryB6001 are replaced, read
following procedure carefullyand proceedit.
Reasons:
There is a RAM inthe IC6001, whichis backing up:
1. TV Tuning Data.
2. PG shifter Adjustment Data
3. Option Setting Data
WhenIC6001, MAIN C.B.A. and/orBack-up BatteryB6001 are replaced, all above listeddata
become not available.
These data are backing up byusing the powersource of:
AC connected: AC Powersource
AC Disconnected: Back-up BatteryB6001
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Method:
Before replacing IC6001, MAIN C.B.A. and/orB6001:
1. Take anote that stored TV broadcasts channels.(Because , its
user maystore TV broadcasts bymanuallyother than "Auto
Tuning" operation and itisalso erased.)
Afterreplacing IC6001, MAIN C.B.A. and/orB6001:
1. Turn on the VCR.
2. Connect ajumper wire between TL7509 and TL7510 for 1second
to reset IC6001.
Afterresetting IC6001:
1. Store TV broadcasts channelsbyAuto/Manual Tuning using the
OnScreen Displayaccording to note which taken before replacing
IC6001, MAINC.B.A. and/or B6001.
2. Set the Direct Rec function to OFF using OnScreen Displayif
necessary. / (Because, Direct Rec function isset automaticallyto
ONafter resetting IC6001.)/ [Direct Rec Function] / OFF: Normally
set at thisposition. / ON:Thissettingenables Direct Rec. / AV1
Input(A1) becomes exclusive channel for Direct Rec.
3. Perform the PG SHIFTERADJUSTMENT. / (Refer to the Electrical
Adjustment Procedures.)
Note:
1. Itshouldbe performed before tuning.
2. Donot cut off the power source during reset.
Fig. S1
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2.1.2. CYLINDER UNITREPLACEMENT
1. CYLINDERUNITREPLACEMENT
A. Remove the mechanism unitfrom MAINC.B.A./Chassisby
referring“SECTION3. DisassemblyMethod”.
B. Remove the 3screws(A)of the CYLINDERUNITwith ascrew
driver.
C. Unlock the 4locking tabs (B)and disconnect the Cylinder
fiexiblecard from the FPCHolder.
D. Remove the CYLINDERUNIT.
CAUTION:
Handlethe Cylinder flexiblecard with care. When itdamaged, you
shouldreplace wholeCylinder unit.
Fig. S2
2. UPPERCYLINDERDISASSEMBLY
A. Remove 2screws(A).
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B. Remove the Cylinder Stator Unit.
C. Remove 2screws(B).
D. Remove the Cylinder Rotor Unit.
E. Loose Hex screw (C)(1.5mm) and remove the CYLINDER
RETAINER.
F. Remove the Upper Cylinder. Fig. S3
3. UPPERCYLINDERASSEMBLY
When reassembling, perform the steps inthe reverse order.
Notes:
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1. Install the Cylinder Retainer so that the 2holes on top of the
Cylinder Retainer are at right angles with the Cylinder Connection.
2. Tighten the Hex screw (C)(1.5mm) whilepressing downon top of
the Cylinder Retainer. Fig. S4
3. Install the Cylinder Rotor Unitso that the inner holeof the
Cylinder Rotor Unitfits to the small projection (D)on top of the
Upper Cylinder.
4. Tighten 2screws(B). Fig. S5
5. Install the Cylinder Stator Unitso that the rear side of the Cylinder
Stator C.B.A. isparallel with the Cylinder Connection.
6. Tighten 2screws(A). Fig. S6
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7. Confirm the PG SHIFTERADJUSTMENTwith the alignment tape
(PAL: VFJ8125H3F) and adjust itifnecessary.
2.1.3. CHECKING OFMAIN C.B.A.
Whenservicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanismfromthe frame and
turnover.
Fig. S7
2.1.4. FLATCARD CABLE INSTALLATION
Wheninstalling the Flat CardCable on the connector, install the Flat CardCable withthe cable
contacts facing the connectorcontacts.
Fig. S8
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2.2. REMOVALOFCASSETTE TAPE
There are 2 ways toremove a cassette tape.
1. Service Information DisplayOperation
A. Press the FF and EJECTkeyssimultaneoslyfor 3seconds and
set the Service Mode 7.
B. Press STOPkeyinorder to rotate the Loading Motor for
unloading operation. (Payan attention of tape slack)
2. Manual Operation
A. Disconnect the AC Mains Lead and remove the Top Panel.
B. Rotate the MainCam Gear clockwise until the Loading Posts
move to fullyunloaded position as showninFig. S9. (Tape is
remaining) Fig. S9
C. Rotate the Capstan Motor clockwise from the bottom side to
take up the tape. Fig. S10
D. Rotate the MainCam Gear clockwise until the cassette tape is
ejected.
2.3. INTRODUCTIONOFVIDEO HEAD CLEANING CASSETTE /
(POLISHING TYPE)
1. We are pleased to introduce PanasonicVideo Head Cleaning
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Cassette,VFK0923FT [for service purposes] andVFK0923FSE [for
end users] for all VHS/SVHSVCPand 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
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VFK0823FSE
(Forend users)
Type of Cassette Full VHS Cassette
Cleaning Time 10 Seconds/Time
Tape Length 3.34 m
Usabilityina Path 30 Times
Note:
The tape material itselfisthe same inboth types.
3. ADJUSTMENT PROCEDURES
3.1. DISASSEMBLY METHOD
3.1.1. DISASSEMBLY FLOW CHART
This flowchart indicates disassemblysteps of the cabinet parts and the circuit boards inorder
tofind the necessaryitems forservicing.
Whenreassembling, perform the steps inthe reverse order.
Fig. D1
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