Panasonic NV-SJ220EG Bedienungsanleitung

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ORDER NO. VRD0102008C2

Video Cassette Recorder

NV-SJ220EG / NV-SJ220EGM / NV-SJ220EGN / NV-SJ220EGY /

NV-SJ220B / NV-SJ220BL

Z-MECHANISM

SPECIFICATIONS

law.

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1. INTRODUCTION

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-SJ220EG/EGM/EGN (A)

NV-SJ220EGY (B)

NV-SJ220B (C)

NV-SJ220BL (D)

2. GENERAL DESCRIPTIONS

2.1. SERVICE CAUTION

2.1.1. REPLACING IC7702/EEPROM

When the EEPROM: IC7702 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 IC7702 by referring following procedure.

STEP1.REPLACE THE IC7702

1. Remove the C.B.A. with Mechanism unit by referring the Disassembly procedure.

2. Disconnect the AC plug and replace the IC7702.

STEP2.INPUT THE MODEL & OPTION CODE

1. Set up the applicable model code and option code by ordering the following table.

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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.

Display the Setting Code.

5.Press the POWER Button to

turn the power on.

(Colon starts

flashing)

Enter the Model and Option Code.

6.Set the applicable Model and Option code by using

REW, PLAY, STOP and FF keys on the Remote

Controller. (See Fig.S1 & S2)

Exit from Service Mode.

7.Press the POWER Button to

turn the power off.

8. Press FF and EJECT keys

simultaneously in 6 times.

(Normal Indication)

Fig.S1 Service Secreen (sample)

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Model No. Model

Code

Option

Code 1

Option

Code 2

Option

Code 3

NV-SJ220EG/

EGM/EGN/EGY

17 / (11h) 9 / (09h) 212 /

(D4h)

65 / (41h)

NV-SJ220B 19 / (13h) 41 / (29h) 212 /

(D4h)

5 / (05h)

NV-SJ220BL 20 / (14h) 41 / (29h) 212 /

(D4h)

5 / (05h)

Fig. S2 Model Code & Option Code

NOTE:

Since all electrical adjustments data is still not available, perform the Electrical Adjustment continuously.

2.1.2. CYLINDER UNIT REPLACEMENT

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 fiexible card from the FPC Holder.

D. Remove the CYLINDER UNIT.

CAUTION:

Handle the Cylinder fiexible card with care. When it damaged, you should replace whole Cylinder unit.

Fig. S3

2. UPPER CYLINDER DISASSEMBLY

A. Remove 2 screws (A).

B. Remove the Cylinder Stator Unit.

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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3. UPPER CYLINDER ASSEMBLY

When reassembling, perform the steps in the reverse order.

Notes:

1. Install the Cylinder Retainer so that the 2 holes on top of the Cylinder Retainer are at right angles with the P3502

Connection.

2. Tighten the Hex screw (C) (1.5 mm) while pressing down on top of the Cylinder Retainer.

Fig. S5

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3. 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.

4. Tighten 2 screws (B).

Fig. S6

5. install the Cylinder Stator Unit.

6. Tighten 2 screws (A).

Fig. S7

7. Confirm the PG SHIFTER ADJUSTMENT with the alignment tape (PAL: VFJ8125H3F) and adjust it if necessary.

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2.1.3. CHECKING OF MAIN C.B.A.

When servicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanism from the frame and turn over.

Fig. S8

2.1.4. FLAT CARD CABLE INSTALLATION

When installing the Flat Card Cable on the connector, install the Flat Card Cable with the cable contacts

facing the connector contacts.

Fig. S9

2.2. REMOVAL OF CASSETTE TAPE

There are 2 ways to remove a cassette tape.

1. Service Information Display Operation

A. Press the FF and EJECT keys simultaneosly for 3 seconds and set the Service Mode 7.

B. Press STOP key in order to rotate the Loading Motor for unloading operation. (Pay an attention of tape slack)

2. Manual Operation

A. Disconnect the AC Mains Lead and remove the Top Panel.

B. Rotate the Main Cam Gear clockwise until the Loading Posts move to fully unloaded position as shown in Fig.S10.

(Tape is remaining)

Fig. S10

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C. Rotate the Capstan Motor clockwise from the bottom side to take up the tape.

Fig. S11

D. Rotate the Main Cam Gear clockwise until the cassette tape is ejected.

2.3. INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE /

(POLISHING TYPE)

1. 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.

2. These cleaning cassettes are exclusive removing the hard and sticky clogging on video heads.

3. These improve the efficiency of video head cleaning service and shortening cleaning time for end users.

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VFK0923FT

(For Service usage)

Type of Cassette Full VHS Cassette

Cleaning Time 10 Seconds/Time

Tape Length 20 m

Usability in a Path 180 Times

VFK0823FSE

(For end users)

Type of Cassette Full VHS Cassette

Cleaning Time 10 Seconds/Time

Tape Length 3.34 m

Usability in a Path 30 Times

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Note:

The tape material itself is the same in both types.

2.4. SELF-DIAGNOSIS RESULT DISPLAY

The "SELF-DIAGNOSIS RESULT DISPLAY & MEMORY function is built in this VTR.

It means that when the VCR detects undesirable condition, it can be displayed a “Error code (Two numbers

from the left)” with Service Mode 2.

Since the "Error code" is stored in the EEPROM, it can be displayed although after disconnected the AC leads.

It can be displayed with Service Mode 2.

(If a second error had been detected, only the most recent error is displayed. )

For more details, refer to the Service Manual for Z-Mechanism Chassis Order number VRD9612M129.

INDICATION CAUSE REMEDY/CHECK

01 After cylinder lock is detected, the cylinder does

not start rotating again even after tape unloading.

Check the cylinder motor drive circuit.

02 Cassette tape is not wound up during the tape

unloading except EJECT mode.

Check the capstan motor drive circuit.

03 Mechanism locks during mode transition except

EJECT mode.

1. Check the loading motor drive circuit.

2. Check the mechanism phase alignment.

3. Check the mode switch.

04 Mechanism locks during tape unloading. 1. Check the loading motor drive circuit.

2. Check the mechanism phase alignment.

06 Mechanism locks after tape unloading in EJECT

mode.

1. Check the loading motor drive circuit.

2. Check the mechanism phase alignment for cassette holder un

07 During recording mode, recording signal is less

than the normal condition.

Protection of the over-current flowing in transi

which produces the power supply for recordin

mode.

08 Recording circuit works except recording mode. Check the recording circuit.

16 Cylinder lock detection. Check the cylinder unit and the cylinder moto

drive circuit.

17 Supply reel mechanism lock detection Check the supply reel mechanism and the su

reel circuit.

18 Take-up reel mechanism lock detection Check the Take-up reel mechanism and the

Take-up reel circuit.

2* PG shifter automatic adjustment error. Check the servo/system control circuit and th

cylinder unit.

Fig. T1 Self-Test indication Display

2.5. CAUTION FOR AC MAINS LEAD (NV-SJ220B/BL)

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