JVC GRD270US
Service Manual

5.2

EMERGENCY DISPLAY

Example (in case of the error number E01):
E01 E01 REMOVE AND REATTACH BATTERY

Whenever some abnormal signal is input to the syscon CPU, an error number (E01, as an example) is displayed on the LCD monitor or (in the electronic view finder).In every error status, such the message as shown below alter nately appear over and over. � In an emergency mode, all operations except turning on/off the POWER switch are ineffectual. LCD display E01 Emergencymode LOADING Details

UNIT IN

SAFEGUARD MODE

Possible cause

In the case the encoder position is 1. The mechanism is locked during mode shift. not shifted to the next point though 2. The mechanism is locked at the mechanism loading end, the loading motor has rotated in the because the encoder position is skipped during loading direction for 4 seconds or mechanism mode shift. more. This error is defined as [E01]. 3. No power is supplied to the loading MDA. In the case the encoder position is 1. The mechanism is locked during mode shift. not shifted to the next point though 2. The mechanism is locked at the mechanism loading end, the loading motor has rotated in the because the encoder position is skipped during unloading direction for 4 seconds or mechanism mode shift. more. This error is defined as [E02]. 1. The idler gear does not engage with the reel disk well. 2. Though the idler gear and reel disk are engaged with each other, the tape is not wound because of overload to the mechanism. 3. No FG pulse is output from the reel sensor. 4. No power is supplied to the reel sensor. 5. Tape transport operation takes place with a cassette having no tape inside. 6. The tape slackens and no pulse is produced until the slack is taken up and the tape comes into the normal status.

E02

UNLOADING

E03

TU & SUP REEL FG In the case no REEL FG is produced for seconds shown in the table below or more in the capstan rotation mode after loading was complete, the mechanism mode is shifted to STOP with the pinch roller set off. This error is defined as [E03].However, no REEL EMG is detected in the SLW/STILL mode.
REEL(SUP) REEL(TU) PB/REC 3 SEC 3 SEC S-FWD 3 SEC 0.3 SEC S-REW 0.3 SEC 3 SEC FF 3 SEC 0.1 SEC REW 0.1 SEC 3 SEC

E04

DRUM FG

In the case there is no DRUM FG 1. The drum cannot be started or drum rotation is stopped input in the drum rotation mode for because tape transport load is too high. 4 seconds or more. This error is 1) Tape tension is extremely high. defined as [E04], and the 2) The tape is damaged or soiled with grease, etc. mechanism mode is shifted to 2. The DRUM FG signal is not received by the syscon CPU. STOP with the pinch roller set off. 1) Disconnection in the middle of the signal line. 2) Failure of the DRUM FG pulse generator (hall element). 3. No drum control voltage is supplied to the MDA. 4. No power is supplied to the DRUM MDA. In the case no CAPSTAN FG is 1. The CAPSTAN FG signal is not received by the syscon produced in the capstan rotation CPU. mode for 2 seconds or more. This 1) Disconnection in the middle of the signal line. error is defined as [E06], and the 2) Failure of the CAPSTAN FG pulse generator (MR mechanism mode is shifted to element). STOP with the pinch roller set 2. No capstan control voltage is supplied to the MDA. off.However, no CAPSTAN EMG is 3. The capstan cannot be started or capstan rotation is detected in the STILL/FF/REW stopped because tape transport load is too high. mode. 1) Tape tension is extremely high. (Mechanical locking) 2) The tape is damaged or soiled with grease, etc. (Tape tangling occurs, etc.) Fig.5-2-1

E05 E06

CAPSTAN FG

(No.YF075)1-19