JVC KV-V8 service manual EMG detail information

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1.6.4EMG detail information <1>

The status (electrical operation mode) of the VCR and the sta- tus (mechanism operation mode/sensor information) of the mechanism in the latest EMG can be confirmed based on the figure in EMG detail information <1> .

[FDP/OSD display]

*1 : * 2 : 34

*1 : Deck operation mode at the moment of EMG

*2 : Mechanism operation mode at the moment of EMG

3– : Mechanism sensor information at the moment of EMG

–4 : Mechanism mode position at the moment of EMG

Note:

For EMG detailed information <1>, the content of the code that is shown on the FDP (or OSD) differs depending on the parts number of the system control microprocessor (IC3001) of the VCR. The system control microprocessor parts number starts with two letters, refer these to the cor- responding table.

*1 : Deck operation mode [Common table of MN*, HD* and M3*]

*2 : Mechanism operation mode [Common table of MN* and M3*]

Display

 

Mechanism operation mode

MN*

M3*

 

 

 

00

00

 

Command standby (Status without executing command)

02

02

 

POWER OFF by EMG occurrence

04

04

 

Moving to the adjacent position in the LOAD direction

06

06

 

Moving to the adjacent position in the UNLOAD direction

0808 Cassette ejection being executed / Cassette housing ejection being executed

-0A Mode transition to STOP with cassette ejection end

0A

0C

 

Cassette insertion being executed

0C

0E

 

Tape being loaded

0E

10

 

Tape being unloaded

10

12

 

Mode transition to STOP with pinch roller compression ON

12

14

 

Mode transition to STOP with pinch roller compression OFF

1416 Mode transition to STOP with pinch roller compression OFF as a result of POWER OFF

1618 Mode transition to STOP with pinch roller compression ON as a result of POWER ON

18

1A Mode transition to PLAY

1A

1C

 

Mode transition to FWD SEARCH

1C

1E

 

Mode transition to REC

1E

20

 

Mode transition to FWD STILL / SLOW

20

22

 

Mode transition to REV STILL / SLOW

22

24

 

Mode transition to REV SEARCH

24

26

 

Mode transition from FF / REW to STOP

26

28

 

Mode transition to FF

28

2A

 

Mode transition to REW

2A

2C

 

4 sec. of REV as a result of END sensor going ON during loading

2C

2E

 

Short FF / REV as a result of END sensor going ON during unloading

Display

MN*/M3* HD*

00-

0100

0201

03-

0404

0C 0E

1011

2022

21-

22-

2426

2C 2E

4043

42-

4447

4C 4C

6C 6E

8484

8585

8C 8F

8D -

8E -

AC AF

AD -

CC CD

CD -

EC EF

ED -

Deck operation mode

Mechanism being initialized

STOP with pinch roller pressure off (or tape present with P.OFF)

STOP with pinch roller pressure on

POWER OFF as a result of EMG

PLAY

REC

Cassette ejected

FF

Tape fully loaded, START sensor ON, short FF

Cassette identification FWD SEARCH before transition to FF (SP x7-speed)

FWD SEARCH (variable speed) including x2-speed

INSERT REC

REW

Cassette identification REV SEARCH before transition to REW (SP x7-speed)

REV SEARCH (variable speed)

AUDIO DUB

INSERT REC (VIDEO + AUDIO)

FWD STILL / SLOW

REV STILL / SLOW

REC PAUSE

Back spacing

Forward spacing (FWD transport mode with BEST function)

INSERT REC PAUSE

INSERT REC back spacing

AUDIO DUB PAUSE

AUDIO DUB back spacing

INSERT REC (VIDEO + AUDIO) PAUSE

INSERT REC (VIDEO + AUDIO) back spacing

2E

30

 

Mechanism position being corrected due to overrun

80

80

 

Mechanism in initial position (Dummy command)

[Table of HD*]

Display

Mechanism operation mode

00STOP with pinch roller pressure off

01STOP with pinch roller pressure on

02U/L STOP (or tape being loaded)

04PLAY

05PLAY (x1-speed playback using JOG)

0E REC

11Cassette ejected

22FF

26FWD SEARCH (variable speed) including x2-speed

2E INSERT REC

43REW

47REV SEARCH

4C AUDIO DUB

6E INSERT REC (VIDEO + AUDIO)

84FWD STILL/SLOW

85REV STILL/SLOW

8F REC PAUSE

AF

 

INSERT REC PAUSE

C7

 

REV SEARCH (x1-speed reverse playback using JOG)

CD

 

AUDIO DUB PAUSE

EF

 

INSERT REC (VIDEO + AUDIO) PAUSE

F0

 

Mechanism being initialized

F1

 

POWER OFF as a result of EMG

F2

 

Cassette being inserted

F3

 

Cassette being ejected

F4

 

Transition from STOP with pinch roller pressure on to STOP with pinch

 

 

roller pressure off

F5

 

Transition from STOP with pinch roller pressure on to PLAY

F6

 

Transition from STOP with pinch roller pressure on to REC

F7

 

Cassette type detection SEARCH before FF/REW is being executed

F8

 

Tape being unloaded

F9

 

Transition from STOP with pinch roller pressure off to STOP with pinch

 

 

roller pressure on

FA

 

Transition from STOP with pinch roller pressure off to FF/REW

FB

 

Transition from STOP with pinch roller pressure off to REC.P (T.REC,etc.)

FC

 

Transition from STOP with pinch roller pressure off to cassette type de-

 

 

tection SEARCH

FD

 

Short REV being executed after END sensor on during unloading

FE

 

Tension loosening being executed after tape loading (STOP with pinch

 

 

roller pressure on)

1-7

Image 9
Contents KV-V8 Specificatios KV-V8J How to read the disassembly and assembly Disassembly flow chartAdjustment information for installation Disassembly/assembly methodFig. D1 Fig. D4 How to set the Service position Service positionMechanism service mode How to set the Mechanism service modeFDP display model FDP display FDP Content Cause EMG detail information Mechanism sensor information Common table of MN*, HD* and M3 Jigs and tools required for adjustment Before starting repair and adjustment PrecautionsChecking for proper mechanical operations Manually removing the cassette tape5a Mechanism assembly top side Lubrication CleaningTape DriveHow to set the Mechanism assembling mode Replacement of major parts Before starting disassemblingPinch roller arm assembly 4 A/C head How to removeReel disk assembly take up Lever assembly, sub deck assembly, capstan motorLoading motor Control bracketSub brake assembly take up, control cam Control plateSlide plate Change lever assembly, rotary encoder Take up head, tension arm leverRemove the take up head and tension arm lever Stator assembly Rotor assembly How to removeUpper drum assembly Guide rail19a Rotary encoder, change lever assembly, control cam Loading arm assemblies supply, take upAttach the surrounding parts of the guide rail Mechanism timing chart Compatibility adjustment Notes Repeat steps 1 to 10 by using the alignment tape A2FM waveform linearity 3 A/C head phase X-value Height and tilt of the A/C headPlay back the alignment tape a Tension pole position Standard tracking presetRequired adjustment tools PrecautionSwitch settings and standard precautions Required test equipmentsSlow tracking preset No.49625 KV-V8