Sony DNW-A75 Maintenance Manual page 74

3-2. Details of Error Messages
(NO COMMUNICATION)
Description: Abnormality in the interface between the lower control panel's MPU (KY-438
board) and SYS1 CPU (SS-83 board) was detected.
n
This error message is only displayed on the time data display area in that the
abnormality of the interface is detected in the lower control panel side.
Detecting condition: When the lower control panel's MPU (IC104 on KY-438 board) is received no
interface signal from SYS1 CPU (IC704 on SS-83 board) for more than two
seconds.
Possible causes: . Cable connection defect or disconnection
. Line receiver/transceiver (IC102 on KY-438 board) trouble
. SIO (IC1102 on SS-83 board) trouble
Protecting operation: None
ERROR-01 REEL TROUBLE - 1
(REEL TROUBLE)
Description: Tape slacking was detected during threading or unthreading.
Detecting conditions: 1) When no take-up reel FG can be detected in the unthread operation just after
2) When the relation between the take-up reel FG and threading FG is out of the
Sub error message: None
Possible causes: . Cassette compartment trouble or installation defect
. Clearance adjustment defect of take-up reel FG detection block
. Take-up reel FG waveform shaper circuit (MS-58 board) trouble
. Take-up reel motor trouble
. Take-up reel motor drive circuit (DR-315 board) trouble
. Take-up reel brake trouble
. Take-up reel brake solenoid drive circuit (MS-58 board) trouble
. Servo adjustment defect on take-up reel
. Harness disconnection
. Take-up reel table height adjustment defect
Protecting operation: Enters the protection mode.
c
Be sure to take out the cassette manually (refer to Section 2-12). Do not turn on
the power again without taking out the cassette. This may damage the tape.
3-4
activation.
specification in operations other than unthread just after activation.
* The reel did not rotate because the cassette was lifted-up from the speci-
fied position.
DNW-A75/A75P