Panasonic NV-SD440EG/ User manual

Service Manual
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ORDER NO. VRD9906016C2
Video Cassette Recorder
NV-SD440EG/NV-SD440B/NV-SD440BL
Z-MECHANISM
© 1999 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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Table Of Contents
COVER
1 INTRODUCTION
2 GENERAL DESCRIPTIONS
2.1 SERVICE INFORMATION
2.1.1 CHANNEL MEMORY IC INITIALIZATION
2.1.2 CHECKING OF MAIN C.B.A.
2.1.3 CYLINDER UNIT REPLACEMENT
2.1.4 FLAT CARD CABLE INSTALLATION
2.2 REMOVAL OF CASSETTE TAPE
2.3 CAUTION FOR AC MAINS LEAD (NV-SD440B/BL)
2.4 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE (POLISHING TYPE)
3 OPERATING INSTRUCTIONS
4 ADJUSTMENT PROCEDURES
4.1 DISASSEMBLY METHOD
4.1.1 DISASSEMBLY FLOW CHART
4.1.2 DETAIL OF DISASSEMBLY METHOD
4.2 MECHANICAL ADJUSTMENT PROCEDURES
4.3 ELECTRICAL ADJUSTMENT PROCEDURES
4.3.1 TEST EQUIPMENT
4.3.2 VCR SETTING
4.3.3 ADJUSTMENTS
4.3.4 PG SHIFTER ADJUSTMENT(AUTOMATIC)
4.3.5 AI FUNCTION ADJUSTMENT(AUTOMATIC)
4.3.6 LOCATION OF TEST POINTS& CONTROLS
4.3.7 CIRCUIT BOARD LAYOUT
5 ABBREVIATIONS
6 INPUT/OUTPUT CHART
6.1 INPUT/OUTPUT CHART FOR IC6001
6.2 TRUTH TABLE (EG MODEL)
6.3 TRUTH TABLE (B/BL MODEL)
7 WAVEFORM TABLE
8 BLOCK DIAGRAMS
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8.1 SYSTEM CONTROL& SERVO BLOCK DIAGRAM
8.2 LUMINANCE& CHROMINANCE BLOCK DIAGRAM
9 SCHEMATIC DIAGRAMS
9.1 POWER SCHEMATIC DIAGRAM
9.2 POWER SUPPLY/RF SECTION IN MAIN SCHEMATIC DIAGRAM
9.3 TIMER SECTION IN MAIN SCHEMATIC DIAGRAM
9.4 SYSTEM CONTROL& SERVO SECTION IN MAIN SCHEMATIC DIAGRAM
9.5 CAPSTAN UNIT SCHEMATIC DIAGRAM
9.6 LUMINANCE& CHROMINANCE/AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM
9.7 INPUT/OUTPUT SECTION IN MAIN SCHEMATIC DIAGRAM
9.8 HEAD AMP SCHEMATIC DIAGRAM
9.9 OSD PACK SCHEMATIC DIAGRAM
9.10 CYLINDER STATOR UNIT SCHEMATIC DIAGRAM
9.11 AV FRONT SCHEMATIC DIAGRAM
9.12 TV DEMODULATOR PACK SCHEMATIC DIAGRAM
10 CIRCUIT BOARD ASSEMBLIES
10.1 POWER C.B.A.
10.2 CYLINDER STATOR UNIT
10.3 MAIN C.B.A.
10.4 HEAD AMP C.B.A.
10.5 AV FRONT C.B.A.
10.6 TV DEMODULATOR PACK C.B.A.
10.7 OSD PACK C.B.A.
11 EXPLODED VIEWS
11.1 CHASSIS PARTS SECTION
11.2 CASING PARTS SECTION
11.3 PACKING PARTS SECTION
12 REPLACEMENT PARTS LIST
12.1 CHASSIS PARTS LIST
12.2 CASING PARTS LIST
12.3 PACKING PARTS LIST
12.4 ELECTRICAL PARTS LIST
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1 INTRODUCTION
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This service manual contains technical information which will allow service personnel to understand and
service this model.
If the circuit is changed or modified, this information will be followed by supplementary service manual
to be filed with original service manual.
Note:
Adjustment procedures, Disassembly Procedures and Assembly Procedures for Mechanism
Chassis are separate volume from this service manual./Please refer to the service manual for
Z-Mechanism Chassis. (Order No. VRD9802005C2)
1.
The Model No. is indicated on the Schematic Diagram and Circuit Board Diagrams as follows.2.
Model No. Indication Mark
NV-SD440EG (EG)
NV-SD440B (B)
NV-SD440BL (BL)
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2 GENERAL DESCRIPTIONS
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2.1 SERVICE INFORMATION
2.1.1 CHANNEL MEMORY IC INITIALIZATION
2.1.2 CHECKING OF MAIN C.B.A.
2.1.3 CYLINDER UNIT REPLACEMENT
2.1.4 FLAT CARD CABLE INSTALLATION
2.2 REMOVAL OF CASSETTE TAPE
2.3 CAUTION FOR AC MAINS LEAD (NV-SD440B/BL)
2.4 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE (POLISHING TYPE)
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2.1 SERVICE INFORMATION
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2.1.1 CHANNEL MEMORY IC INITIALIZATION
2.1.2 CHECKING OF MAIN C.B.A.
2.1.3 CYLINDER UNIT REPLACEMENT
2.1.4 FLAT CARD CABLE INSTALLATION
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2.1.1 CHANNEL MEMORY IC
INITIALIZATION
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When replacing the Memory IC7801 and/or Oscillator X6001, Memory IC7801 has to be initialized due
to the setting value changes.
Note:
When replacing the memory IC7801, the OSD microprocessor IC7703 should be replaced
together.
1.
It has to be performed before tuning.2.
Meaning of "MEMORY IC INITIALIZATION" is to make dependency in different models and to
distinguish between different features.
3.
It does not need to perform when replacing the System Control IC6001.4.
<CHANNEL MEMORY IC INITIALIZATION>
PROCEDURES FIP Display Monitor Screen
Press the FF and EJECT keys simultaneously for 3 seconds. None
Press the FF and EJECT keys simultaneously more twice. None
Press the EJECT key for 3 seconds. None
Press the CH UP key twice. None
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Press the POWER key.
(Colon starts flashing)
Service Screen (See Fig.S1 Service
Secreen (sample) )
Set the Model Code and Option Code by pressing 10-key or [RIGHT]
[LEFT] [UP] [DOWN] keys on the Remote Controller Unit. (See Fig.
S2 Model Code & Option Code )
Service Screen (See Fig.S1 Service
Secreen (sample) )
To release Service Mode, press the POWER key and then press the
FF and EJECT keys simultaneously 6 times until the normal
indication on the FIP.
None
Fig.S1 Service Secreen (sample)
Model No. Model Code Option Code 1 Option Code 2
NV-SD440EG 65 8 64
NV-SD440B 73 32 64
NV-SD440BL 77 32 64
Fig. S2 Model Code& Option Code
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2.1.2 CHECKING OF MAIN C.B.A.
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When servicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanism from the frame and turn
over.
And then connect the Extension Cable (VFK2744) between the POWER C.B.A. connector (P1103) and
the MAIN C.B.A. connector (P1001) as shown in Fig. S3 .
Fig. S3
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2.1.3 CYLINDER UNIT REPLACEMENT
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CYLINDER UINT REPLACEMENT
Remove the 3 Screws (A) of the CLINDER UNIT with a magnetized screw driver.1.
Fig. S4
UPPER CYLINDER DISASSEMBLY
Remove 2 screws (A).1.
Remove the Cylinder Stator Unit.
Fig. S5
2.
Remove 2 screws (B).3.
Remove the Cylinder Rotor Unit.
Fig. S6
4.
1.
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Loose hex screw (C) (1.5mm) and remove the Cylinder Retainer.5.
Remove the Upper Cylinder.
Fig. S7
6.
UPPER CYLINDER ASSEMBLY
Install the Cylinder Retainer so that the 2 holes on top of the Cylinder Retainer are at right
angles with the Head Amp Shield.
1.
Tighten the hex screw (C) (1.5mm) while pressing down on top of the Cylinder Retainer.
Fig. S8
2.
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Install the Cylinder Rotor Unit so that the inner hole of the Cylinder Rotor Unit fits to the
small projection (D) on top of the Upper Cylinder.
3.
Tighten 2 screws (B).
Fig. S9
4.
Install the Cylinder Stator Unit so that the rear side of the Cylinder Stator C.B.A. is parallel
with the Head Amp Shield.
5.
Tighten 2 screws (A).6.
Confirm the PG SHIFTER ADJUSTMENT with the alignment tape (PAL:
VFJ8125H3F/NTSC: VFM8080HQFP) and adjust it if necessary.
Fig. S10
7.
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2.1.4 FLAT CARD CABLE INSTALLATION
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When installing the Flat Card Cable on the connector, install the Flat Card Cable with the cable contacts
facing the connector contacts.
Fig. S11
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2.2 REMOVAL OF CASSETTE TAPE
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There are 2 ways to remove a cassette tape.
Service Information Display Operation
Press the FF and EJECT keys simultaneosly for 3 seconds and set the Service Mode 7.1.
Press STOP key in order to rotate the Loading Motor for unloading operation. (Pay an
attention of tape slack)
2.
Manual Operation
Disconnect the AC Mains Lead and remove the Top Panel.1.
Rotate the Main Cam Gear clockwise until the Loading Posts move to fully unloaded
position as shown in Fig.S12. (Tape is remaining)
Fig. S12
2.
Rotate the Capstan Motor clockwise from the bottom side to take up the tape.
Fig. S13
3.
Rotate the Main Cam Gear clockwise until the cassette tape is ejected.4.
1.
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2.3 CAUTION FOR AC MAINS LEAD
(NV-SD440B/BL)
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Caution for AC Mains Lead (NV-HD680B)
For your safety please read the following text carefully
This appliance is supplied with a moulded three pin mains plug
for your safety and convenience.
A 5 amp fuse is fitted in this plug.
Should the fuse need to be replaced please ensure that the
replacement fuse has a rating of 5 amps and that it is approved
by ASTA or BSI to BS 1362.
Check for the ASTA mark or the BSI mark on the body of
the fuse.
If the plug contains a removable fuse cover you must ensure
that it is refitted when the fuse is replaced.
If you lose the fuse cover the plug must not be used until a
replacement cover is obtained.
A replacement fuse cover can be purchased from your local
Panasonic Dealer.
IF THE FITTED MOULDED PLUG IS UNSUITABLE
FOR THE SOCKET OUTLET IN YOUR HOME THEN
THE FUSE SHOULD BE REMOVED AND THE PLUG
CUT OFF AND DISPOSED OF SAFELY.
THERE IS A DANGER OF SEVERE ELECTRICAL
SHOCK IF THE CUT OFF PLUG IS INSERTED INTO
ANY 13 AMP SOCKET.
If a new plug is to be fitted please observe the wiring code as
shown below.
If in any doubt please consult a qualified electrician.
IMPORTANT
The wires in this mains lead are coloured in accordance with
the following code:
Blue: Neutral
Brown: Live
As the colours of the wires in the mains lead of this appliance
may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
The wire which is coloured BLUE must be connected to the
terminal in the plug which is marked with the letter N or
coloured BLACK.
The wire which is coloured BROWN must be connected to the
terminal in the plug which is marked with the letter L or coloured
RED.
Under no circumstance should either of these wires be
connected to the earth terminal of the three pin plug, marked
with the letter E or the Earth Symbol .
How to replace the Fuse
¡There are two types of the AC Mains Lead assembly:
Aand Bas shown below.
1Open the fuse compartment with a screwdriver.
2Replace the fuse and fuse cover.
TYPE A
TYPE B
12
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2.4 INTRODUCTION OF VIDEO HEAD
CLEANING CASSETTE (POLISHING
TYPE)
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We are pleased to introduce Panasonic Video Head Cleaning Cassette, VFK0923FT [for service
purposes] and VFK0923FSE [ for end users] for all VHS/SVHS VCP and VCR.
1.
These cleaning cassettes are exclusive removing the hard and sticky clogging on video heads.2.
These improve the efficiency of video head cleaning service and shortening cleaning time for end
users.
VFK0923FT
(For Service usage) VFK0823FSE (For end users)
Type of Cassette Full VHS Cassette Full VHS Cassette
Cleaning Time 10 Seconds/Time 10 Seconds/Time
Tape Length 20 m 3.34 m
Usability in a Path 180 Times 30 Times
Note:
The tape material itself is the same in both types.
3.
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