JVC KV-V8 service manual FDP Content Cause

FDP

CONTENT

CAUSE

E01: Loading EMG

When the mechanism mode cannot be changed to an-

1.

The mechanism is locked in the middle of mode transition.

other mode even when the loading motor has rotated

2. The mechanism is locked at the loading end due to the encoder position

for more than 4 seconds in the loading direction, [E:01]

reading error during mode transition.

is identified and the power is turned off.

3.

Power is not supplied to the loading MDA.

E02: Unloading EMG

When the mechanism mode cannot be changed to an-

1.

The mechanism is locked in the middle of mode transition.

other mode even when the loading motor has rotated

2.

The mechanism is locked at the unloading end due to the encoder posi-

for more than 4 seconds in the unloading direction, [E:02]

tion reading error during mode transition.

is identified and the power is turned off.

3.

Power is not supplied to the loading MDA.

E03: Take Up Reel

When the take-up reel pulse has not been generated for

1.

The take-up reel pulse is not generated in the FWD transport modes (PLAY/

Pulse EMG

more than 4 seconds in the capstan rotating mode, [E:03]

FWD SEARCH/FF, etc.) because;

is identified, the pinch rollers are turned off and stopped,

1) The idler gear is not meshed with the take-up reel gear;

and the power is turned off. However, the reel EMG is

2) The idler gear is meshed with the take-up reel gear, but incapable of wind-

not detected in STILL/SLOW modes.

ing due to too large mechanical load (abnormal tension);

3) The take-up reel sensor does not output the FG pulse.

2.

The supply reel pulse is not generated in the REV transport modes (REV

SEARCH/REW, etc.) because;

1) The idler gear is not meshed with the supply reel gear.

2) The idler gear is meshed with the supply reel gear, but incapable of wind-

ing due to too large a mechanical load (abnormal tension);

3) The supply reel sensor does not output the FG pulse.

3.

Power is not supplied to the reel sensors.

E04: Drum FG

When the drum FG pulse has not been input for more

1.

The drum could not start or the drum rotation has stopped due to too large

EMG

than 3 seconds in the drum rotating mode, [E:04] is iden-

a load on the tape, because;

tified, the pinch rollers are turned off and stopped, and

1) The tape tension is abnormally high;

the power is turned off.

2.

2) The tape is damaged or a foreign object (grease, etc.) adheres to the tape.

The drum FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (hall device) of the drum is faulty.

3.

The drum control voltage (DRUM CTL V) is not supplied to the MDA.

4.

Power is not supplied to the drum MDA.

E05: Cassette Eject

When the eject operation does not complete in 3 sec-

1.

The cassette cannot be ejected due to a failure in the drive mechanism of

EMG

onds after the start, [E:05] is identified, the pinch rollers

the housing.

are turned off and stopped, and the power is turned off.

2. When the housing load increases during ejection, the loading motor is

When the cassette insertion operation does not complete

stopped because of lack of headroom in its drive torque.

in 3 seconds after the start, the cassette is ejected. In

Housing load increasing factors: Temperature environment (low tempera-

addition, when the operation does not complete within

ture, etc.), mechanism wear or failure.

3 seconds after the start, [E:05] is also identified and the

3.

The sensor/switch for detecting the end of ejection are not functioning normally.

power is turned off immediately.

4.

The loading motor drive voltage is lower than specified or power is not sup-

plied to the motor (MDA).

5.

When the user attempted to eject a cassette, a foreign object (or perhaps

the user's hand) was caught in the opening of the housing.

E06: Capstan FG

When the capstan FG pulse has not been generated for

1.

The capstan could not start or the capstan rotation has stopped due to too

EMG

more than 1 second in the capstan rotating mode, [E:06]

large a load on the tape, because;

is identified, the pinch rollers are turned off and stopped,

1) The tape tension is abnormally high (mechanical lock);

and the power is turned off.However, the capstan EMG

2) The tape is damaged or a foreign object (grease, etc.) is adhered to the

is not detected in STILL/SLOW/FF/REW modes.

2.

tape (occurrence of tape entangling, etc.).

The capstan FG pulse did not reach the System controller CPU because;

1) The signal circuit is disconnected in the middle;

2) The FG pulse generator (MR device) of the capstans is faulty.

3.

The capstan control voltage (CAPSTAN CTL V) is not supplied to the MDA.

4.

Power is not supplied to the capstan MDA.

E07: SW Power

When short-circuiting of the SW power supply with GND

1.

The SW 5 V power supply circuit is shorted with GND.

Short-Circuit

has lasted for 0.5 second or more, [E:07] is identified,

2.

The SW 12 V power supply circuit is shorted with GND.

EMG

all the motors are stopped and the power is turned off.

E08: DD Initialized

When DD tilting does not complete in 4 seconds, [E:08]

1.

The absolute value sensor is defective. (The soldered parts have separated.)

(Absolute

is identified, the tilt motor is stopped and the power is

2.

The pull-up resistor at the absolute sensor output is defective. (The soldered parts

Position

turned off.

have separated.)

Sensor)

3.

Contact failure or soldering failure of the pins of the connector (board-to-board) to the

EMG

4.

absolute value sensor.

The absolute value sensor data is not sent to the System Controller CPU.

When the DD FG pulse is not generated within 2.5 sec-

1. The FG sensor is defective. (The soldered parts have separated.)

E09: DD FG EMG

onds, [E:09] is identified, the tilt motor is stopped and

2.

The pull-up resistor at the FG sensor output is defective. (The soldered parts have

the power is turned off.

3.

separated.)

Contact failure or soldering failure of the pins of the connector (board-to-board) to the FG sensor.

4.

The power to the sensor is not supplied. (Connection failure/soldering failure)

5.

The FG pulse is not sent to the System Controller CPU.

6.

The tilt motor is defective. (The soldered parts have separated.)

7.

The drive power to the tilt motor is not supplied. (Connection failure/soldering failure)

8.

The tilt motor drive MDA - IC is defective.

9.

Auto-recovery of the DD tilting cannot take place due to overrun.

E0A:Supply Reel

When the supply reel pulse has not been generated for

1.

The supply reel pulse is not generated in the FWD transport mode (PLAY/

Pulse EMG

more than 10 seconds in the capstan rotating mode,

FWD SEARCH/FF, etc.) because;

[E:0A] is identified and the cassette is ejected (but the

1) PLAY/FWD or SEARCH/FF is started while the tape in the inserted cas-

power is not turned off). However, note that the reel EMG

sette is cut in the middle;

is not detected in the SLOW/STILL mode.

2) A mechanical factor caused tape slack inside and outside the supply

reel side of the cassette shell. In this case, the supply reel will not rotate

until the tape slack is removed by the FWD transport, so the pulse is not

generated until then;

3) The FG pulse output from the supply reel sensor is absent.

2.

The take-up reel pulse is not generated in the REV transport mode (REV

SEARCH/REW, etc.).

1) REV SEARCH/REW is started when the tape in the inserted cassette

has been cut in the middle;

2) A mechanical factor caused tape slack inside and outside the take-up

reel side of the cassette shell. In this case, the supply reel will not rotate

until the tape slack is removed by the REV transport, so the pulse will

not be generated until that time;

3) The FG pulse output from the take-up reel sensor is absent.

3.

The power to a reel sensor is not supplied.

EC1 or EU1:

Presupposing the presence of the control pulse output in the PLAY mode, when the value obtained by mixing the two V.FM output

Head clog warning

channels (without regard to the A.FM output) has remained below a certain threshold level for more than 10 seconds, [E:C1] or [E:U1]

is identified and recorded in the emergency history. During the period in which a head clog is detected, the FDP and OSD repeat the

“3-second warning display” and “7-second noise picture display” alternately.

EMG code : “E:C1” or “E:U1” / FDP : “U:01” / OSD : “Try cleaning tape.” or “Use cleaning cassette.”

The head clog warning is reset when the above-mentioned threshold has been exceeded for more than 2 seconds or the mode is

changed to another mode than PLAY.