Panasonic NV-SD440EG/ Bedienungsanleitung

Service Manual

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ORDER NO. VRD9906016C2

Video Cassette Recorder

NV-SD440EG/NV-SD440B/NV-SD440BL

Z-MECHANISM

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Table Of Contents
COVER
INTRODUCTION
GENERAL DESCRIPTIONS
1 SERVICE INFORMATION
1.1 CHANNEL MEMORY IC INITIALIZATION
1.2 CHECKING OF MAIN C.B.A.
1.3 CYLINDER UNIT REPLACEMENT
1.4 FLAT CARD CABLE INSTALLATION
2 REMOVAL OF CASSETTE TAPE
3 CAUTION FOR AC MAINS LEAD (NV-SD440B/BL)
4 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE (POLISHING TYPE)
OPERATING INSTRUCTIONS
ADJUSTMENT PROCEDURES
1 DISASSEMBLY METHOD
1.1 DISASSEMBLY FLOW CHART
1.2 DETAIL OF DISASSEMBLY METHOD
2 MECHANICAL ADJUSTMENT PROCEDURES
3 ELECTRICAL ADJUSTMENT PROCEDURES
3.1 TEST EQUIPMENT
3.2 VCR SETTING
3.3 ADJUSTMENTS
3.4 PG SHIFTER ADJUSTMENT(AUTOMATIC)
3.5 AI FUNCTION ADJUSTMENT(AUTOMATIC)
3.6 LOCATION OF TEST POINTS& CONTROLS
3.7 CIRCUIT BOARD LAYOUT
ABBREVIATIONS
INPUT/OUTPUT CHART
1 INPUT/OUTPUT CHART FOR IC6001
2 TRUTH TABLE (EG MODEL)
3 TRUTH TABLE (B/BL MODEL)
WAVEFORM TABLE
BLOCK DIAGRAMS
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1 SYSTEM CONTROL& SERVO BLOCK DIAGRAM
2 LUMINANCE& CHROMINANCE BLOCK DIAGRAM
SCHEMATIC DIAGRAMS
1 POWER SCHEMATIC DIAGRAM
2 POWER SUPPLY/RF SECTION IN MAIN SCHEMATIC DIAGRAM
3 TIMER SECTION IN MAIN SCHEMATIC DIAGRAM
4 SYSTEM CONTROL& SERVO SECTION IN MAIN SCHEMATIC DIAGRAM
5 CAPSTAN UNIT SCHEMATIC DIAGRAM
6 LUMINANCE& CHROMINANCE/AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM
7 INPUT/OUTPUT SECTION IN MAIN SCHEMATIC DIAGRAM
8 HEAD AMP SCHEMATIC DIAGRAM
9 OSD PACK SCHEMATIC DIAGRAM
10 CYLINDER STATOR UNIT SCHEMATIC DIAGRAM
11 AV FRONT SCHEMATIC DIAGRAM
12 TV DEMODULATOR PACK SCHEMATIC DIAGRAM
CIRCUIT BOARD ASSEMBLIES
1 POWER C.B.A.
2 CYLINDER STATOR UNIT
3 MAIN C.B.A.
4 HEAD AMP C.B.A.
5 AV FRONT C.B.A.
6 TV DEMODULATOR PACK C.B.A.
7 OSD PACK C.B.A.
EXPLODED VIEWS
1 CHASSIS PARTS SECTION
2 CASING PARTS SECTION
3 PACKING PARTS SECTION
REPLACEMENT PARTS LIST
1 CHASSIS PARTS LIST
2 CASING PARTS LIST
3 PACKING PARTS LIST
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)

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.

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.

It does not need to perform when replacing the System Control IC6001.4.

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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