Panasonic NV-SD440EG/ Manuale utente
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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2.1.1 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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