Panasonic NV-MV20EG User manual

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Table Of Contents
COVER
1 INTRODUCTION
1.1 INTRODUCTION
1.2 ABOUT LEAD FREE SOLDER (PbF)
2 GENERAL DESCRIPTIONS
2.1 SERVICE CAUTION
2.1.1 REPLACING IC6002/EEPROM
2.1.2 CYLINDER UNIT REPLACEMENT
2.1.3 CHECKING OF MAIN C.B.A.
2.1.4 FLAT CARD CABLE INSTALLATION
2.2 REMOVAL OF CASSETTE TAPE
2.3 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE(POLISHING TYPE)
2.4 SELF-DIAGNOSIS RESULT DISPLAY
2.5 CAUTION FOR AC MAINS LEAD (NV-MV20EB/EBL)
3 ADJUSTMENT PROCEDURES
3.1 DISASSEMBLY METHOD
3.1.1 DISASSEMBLY FLOW CHART
3.1.2 DETAIL OF DISASSEMBLY METHOD
3.2 MECHANICAL ADJUSTMENT PROCEDURES
3.3 ELECTRICAL ADJUSTMENT PROCEDURES
3.3.1 TEST EQUIPMENT
3.3.2 VCR SETTING
3.3.3 ADJUSTMENTS
3.3.4 PG SHIFTER ADJUSTMENT(AUTOMATIC)
3.3.5 VHS FREQUENCY RESPONSE ADJUSTMENT
3.3.6 LOCATION OF TEST POINTS& CONTROLS
3.3.7 CIRCUIT BOARD LAYOUT
4 ABBREVIATIONS
5 INPUT/OUTPUT CHART
5.1 INPUT/OUTPUT CHART FOR IC6001
5.2 TRUTH TABLE (EG/EP MODEL)
5.3 TRUTH TABLE (EB/EBL MODEL)
6 WAVEFORM TABLE& VOLTAGE CHART
6.1 WAVEFORM TABLE
6.2 VOLTAGE CHART
7 BLOCK DIAGRAMS
7.1 SYSTEM CONTROL& SERVO BLOCK DIAGRAM
Service Manual
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ORDER NO. MABR0303005C2
Video Cassette Recorder
●NV-MV20EG
NV-MV20EB
NV-MV20EBL
NV-MV15EG
NV-MV15EP
Z-MECHANISM
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7.2 LUMINANCE& CHROMINANCE BLOCK DIAGRAM
8 SCHEMATIC DIAGRAMS
8.1 POWER TRANSFORMER SECTION IN MAIN SCHEMATIC DIAGRAM
8.2 POWER SUPPLY/ RF SECTION IN MAIN SCHEMATIC DIAGRAM
8.3 TIMER SECTION IN MAIN SCHEMATIC DIAGRAM
8.4 SYSTEM CONTROL& SERVO SECTION IN MAIN SCHEMATIC DIAGRAM
8.5 LUMINANCE& CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM
8.6 INPUT/ OUTPUT SECTION IN MAIN SCHEMATIC DIAGRAM
8.7 TV DEMODULATOR PACK SCHEMATIC DIAGRAM
8.8 CYLINDER STATOR UNIT SCHEMATIC DIAGRAM
8.9 CAPSTAN UNIT SCHEMATIC DIAGRAM
9 CIRCUIT BOARD ASSEMBLIES
9.1 TV DEMODULATOR PACK C.B.A.
9.2 CYLINDER STATOR UNIT
9.3 MAIN C.B.A.
10 EXPLODED VIEWS
10.1 CHASSIS PARTS SECTION
10.2 CASING PARTS SECTION
10.3 PACKING PARTS SECTION
11 REPLACEMENT PARTS LIST
11.1 CHASSIS PARTS SECTION PARTS LIST
11.2 CASING PARTS SECTION PARTS LIST
11.3 PACKING PARTS SECTION PARTS LIST
11.4 ELECTRICAL PARTS LIST
12 SCHEMATIC DIAGRAM FOR PRINTING WITH A4 SIZE
© 2003 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
1.1 INTRODUCTION
1.2 ABOUT LEAD FREE SOLDER (PbF)
2 GENERAL DESCRIPTIONS
2.1 SERVICE CAUTION
2.1.1 REPLACING IC6002/EEPROM
2.1.2 CYLINDER UNIT REPLACEMENT
2.1.3 CHECKING OF MAIN C.B.A.
2.1.4 FLAT CARD CABLE INSTALLATION
2.2 REMOVAL OF CASSETTE TAPE
2.3 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE(POLISHING TYPE)
2.4 SELF-DIAGNOSIS RESULT DISPLAY
2.5 CAUTION FOR AC MAINS LEAD (NV-MV20EB/EBL)
3 ADJUSTMENT PROCEDURES
3.1 DISASSEMBLY METHOD
3.1.1 DISASSEMBLY FLOW CHART
3.1.2 DETAIL OF DISASSEMBLY METHOD
3.2 MECHANICAL ADJUSTMENT PROCEDURES
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3.3 ELECTRICAL ADJUSTMENT PROCEDURES
3.3.1 TEST EQUIPMENT
3.3.2 VCR SETTING
3.3.3 ADJUSTMENTS
3.3.4 PG SHIFTER ADJUSTMENT(AUTOMATIC)
3.3.5 VHS FREQUENCY RESPONSE ADJUSTMENT
3.3.6 LOCATION OF TEST POINTS& CONTROLS
3.3.7 CIRCUIT BOARD LAYOUT
4 ABBREVIATIONS
5 INPUT/OUTPUT CHART
5.1 INPUT/OUTPUT CHART FOR IC6001
5.2 TRUTH TABLE (EG/EP MODEL)
5.3 TRUTH TABLE (EB/EBL MODEL)
6 WAVEFORM TABLE& VOLTAGE CHART
6.1 WAVEFORM TABLE
6.2 VOLTAGE CHART
7 BLOCK DIAGRAMS
7.1 SYSTEM CONTROL& SERVO BLOCK DIAGRAM
7.2 LUMINANCE& CHROMINANCE BLOCK DIAGRAM
8 SCHEMATIC DIAGRAMS
8.1 POWER TRANSFORMER SECTION IN MAIN SCHEMATIC DIAGRAM
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8.2 POWER SUPPLY/ RF SECTION IN MAIN SCHEMATIC DIAGRAM
8.3 TIMER SECTION IN MAIN SCHEMATIC DIAGRAM
8.4 SYSTEM CONTROL& SERVO SECTION IN MAIN SCHEMATIC DIAGRAM
8.5 LUMINANCE& CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM
8.6 INPUT/ OUTPUT SECTION IN MAIN SCHEMATIC DIAGRAM
8.7 TV DEMODULATOR PACK SCHEMATIC DIAGRAM
8.8 CYLINDER STATOR UNIT SCHEMATIC DIAGRAM
8.9 CAPSTAN UNIT SCHEMATIC DIAGRAM
9 CIRCUIT BOARD ASSEMBLIES
9.1 TV DEMODULATOR PACK C.B.A.
9.2 CYLINDER STATOR UNIT
9.3 MAIN C.B.A.
10 EXPLODED VIEWS
10.1 CHASSIS PARTS SECTION
10.2 CASING PARTS SECTION
10.3 PACKING PARTS SECTION
11 REPLACEMENT PARTS LIST
11.1 CHASSIS PARTS SECTION PARTS LIST
11.2 CASING PARTS SECTION PARTS LIST
11.3 PACKING PARTS SECTION PARTS LIST
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PV

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11.4 ELECTRICAL PARTS LIST
12 SCHEMATIC DIAGRAM FOR PRINTING WITH A4 SIZE
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Service Manual
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ORDER NO. MABR0303005C2
Video Cassette Recorder
●NV-MV20EG
NV-MV20EB
NV-MV20EBL
NV-MV15EG
NV-MV15EP
Z-MECHANISM
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© 2003 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
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1 INTRODUCTION
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1.1 INTRODUCTION
1.2 ABOUT LEAD FREE SOLDER (PbF)
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1.1 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:
1. 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)
2. The Model No. is indicated on the Schematic Diagram and Circuit Board Diagrams as follows.
Model No. Indication Mark
NV-MV20EG (A)
NV-MV20EB (B)
NV-MV20EBL (C)
NV-MV15EG (D)
NV-MV15EP (E)
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1.2 ABOUT LEAD FREE SOLDER (PbF)
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Distinction of PbF PCB:
PCBs (manufactured) using lead free solder will have a PbF stamp on the PCB.
Caution:
●Pb free solder has a higher melting point than standard solder, Typically the melting point is
50-70°F (30-40°C) higher. Please use a high temperature soldering iron. In case of soldering
iron with temperature control,please set it to 700±20°F (370±10°C)
●Pb free solder will tend to splash when heated too high (about 1100°F/600°C).
When soldering or unsoldering, please completely remove all of the solder on the pins or solder area,
and be sure to heat the soldering points with the Pb free solder until it melts enough.
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2 GENERAL DESCRIPTIONS
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2.1 SERVICE CAUTION
2.1.1 REPLACING IC6002/EEPROM
2.1.2 CYLINDER UNIT REPLACEMENT
2.1.3 CHECKING OF MAIN C.B.A.
2.1.4 FLAT CARD CABLE INSTALLATION
2.2 REMOVAL OF CASSETTE TAPE
2.3 INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE(POLISHING TYPE)
2.4 SELF-DIAGNOSIS RESULT DISPLAY
2.5 CAUTION FOR AC MAINS LEAD (NV-MV20EB/EBL)
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2.1 SERVICE CAUTION
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2.1.1 REPLACING IC6002/EEPROM
2.1.2 CYLINDER UNIT REPLACEMENT
2.1.3 CHECKING OF MAIN C.B.A.
2.1.4 FLAT CARD CABLE INSTALLATION
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2.1.1 REPLACING IC6002/EEPROM
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When the EEPROM: IC6002 is replaced, applicable model code, option code and electrical
adjustment data will not be available.
Therefore, enter and/or adjust the necessary data after replacing IC6002 by referring following
procedure.
STEP1.REPLACE THE IC6002
1. Remove the C.B.A. with Mechanism unit by referring the Disassembly procedure.
2. Disconnect the AC plug and replace the IC6002.
STEP2.INPUT THE MODEL & OPTION CODE
1. Set up the applicable model code and option code by ordering the following table.
PROCEDURE F.I.P. DISPLAY
Turn on the Service Mode
1.Press the FF key and the EJECT key simultaneously for more than 3 seconds.
Activate the Service Mode 2
2.While keep placing FF key, press the EJECT key in twice.
Activate the Entering Mode.
3.Press the EJECT key for more than 3 seconds.
Set the Mode 2.
4.Press the CH UP key in twice.
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Display the Setting Code.
5.Press the POWER key to turn the power on.
(Colon starts flashing)
Enter the Model and Option Code.
6.Service Screen is displayed on the monitor.
7.Set the applicable Model and Option code by using REW, PLAY, STOP and FF keys on theRemote Controller. (See .S1 & S2)
Exit from Service Mode.
8.Press the POWER key to turn the power off.
9. Press FF and EJECT keys simultaneously in 6 times.
(Normal Indication)
Fig.S1 Service Screen (sample)
Model No. MC OC1 OC2
NV-MV20EG 01h 7Ch 08h
NV-MV20EB 03h 5Ch 4Ch
NV-MV20EBL 04h 5Ch 4Ch
NV-MV15EG 01h 08h 00h
NV-MV15EP 06h 08h 40h
Fig. S2 Model Code & Option Code
NOTE:
Since all electrical adjustments data is still not available, perform the Electrical Adjustment
continuously.
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2.1.2 CYLINDER UNIT REPLACEMENT
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1. CYLINDER UNIT REPLACEMENT
A. Remove the mechanism unit from MAIN C.B.A./Chassis by referring “SECTION 2.
Disassembly Procedure”.
B. Remove the 3 screws (A) of the CYLINDER UNIT with a screw driver.
C. Unlock the 4 locking tabs (B) and disconnect the Cylinder flexible card from the FPC
Holder.
D. Remove the CYLINDER UNIT.
CAUTION:
Handle the Cylinder flexible card with care. When it damaged, you should replace
whole Cylinder unit.
Fig. S3
●UPPER CYLINDER DISASSEMBLY
A. Remove 2 screws (A).
B. Remove the Cylinder Stator Unit.
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C. Remove 2 screws (B).
D. Remove the Cylinder Rotor Unit.
E. Loose Hex screw (C) (1.5 mm) and remove the CYLINDER RETAINER.
F. Remove the Upper Cylinder.
Fig. S4
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●UPPER CYLINDER ASSEMBLY
When reassembling, perform the steps in the reverse order.
Notes:
A. Install the Cylinder Retainer so that the 2 holes on top of the Cylinder Retainer are at right
angles with the P5001 Connection.
B. Tighten the Hex screw (C) (1.5 mm) while pressing down on top of the Cylinder Retainer.
Fig. S5
●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.
●Tighten 2 screws (B).
Fig. S6
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●install the Cylinder Stator Unit.
●Tighten 2 screws (A).
Fig. S7
●Confirm the PG SHIFTER ADJUSTMENT with the alignment tape (PAL: VFJ8125H3F) and
adjust it if necessary.
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