Mechanical Trouble Indicator - Sylvania 6319CCB Service Manual

Mechanical Trouble Indicator

1, Each Malfunction Indication
If the MONITOR is turned ON right after the Mechanical
Malfunction occurs or POWER SAFETY/X-RAY is
turned ON, display the following character to show
Malfunction after the EJECT display.
Immediately preceding
Malfunction
REEL Malfunction
DRUM Malfunction
CASSETTE LOADING Mal-
function
TAPE LOADING Malfunction
P-SAFETY 1
P-SAFETY 2
X-RAY
Example: If REEL Malfunction
EJECT R
2, Each Malfunction evaluation
method
X-RAY protect
If X-RAY port becomes continuously 2.5V or more for
120 msec. (4 times 40 msec. interval), the unit shall
immediately turn OFF the POWER/MONITOR and
switch over to the Mechanical Malfunction mode with
POWER OFF.
(To return from this mode shall become possible only by
POWER Key as in the case of the Mechanical Malfunc-
tion).
POWER SAFTY
1) POWER SAFETY 1
If P-SAFETY 1 port becomes continuously 2.5V or
less for 120 msec. (4 times 40 msec. interval) when
MONITOR is ON, the unit shall be assumed to be
the Power Malfunction 1 and immediately turn OFF
the POWER/MONITOR and switch over the Me-
chanical Malfunction mode with POWER OFF.
(Shall not unload)
(To return from this mode shall become possible
only by POWER Key as in the case of the Mechani-
cal Malfunction).
* However the POWER SAFETY 1 function shall be
disabled during 500 msec. right after the MONITOR
turns ON.
Display character
R
D
C
T
1
2
X
1-8-13
2) POWER SAFETY 2
If P-SAFETY 2 port becomes continuously 2.5V or
less for 120 msec. (4 times 40 msec. interval) when
P-ON-H port is ON, the unit shall be assumed to be
the Power Malfunction 2 and immediately turn OFF
the POWER/MONITOR and switch over the Me-
chanical Malfunction mode with POWER OFF.
(Shall not unload)
(To return from this mode shall become possible
only by POWER Key as in the case of the Mechani-
cal Malfunction).
* However the POWER SAFETY 2 function shall be
disabled during 500 msec. right after the P-ON-H
turns ON.
Mechanical Malfunction determination
1) REEL Malfunction detection
Countermeasure for REEL and CAPSTAN motor
rotation malfunction (Except CASSETTE LOADING
function)
After the Malfunction detection with REEL/CAP-
STAN sensor, the unit shall switch over to STOP (B)
and be REEL Mechanical Malfunction.
a) If the T-REEL pulse is not impressed after a lapse of
5 sec. at SP, 10 sec. at LP, 14 sec. at SLP, or more
in the REEL Rotation Mode like PLAY/REC, FS/RS
Mode, and the T-REEL or S-REEL pulse is not
impress after a lapse of 4 sec. or more in REEL
Rotation Mode of FF/REW, it shall be assumed to
stop the rotation and switch over to STOP (B) posi-
tion, then POWER be turned OFF and the unit be
REEL Mechanical Malfunction. (T-REEL and S-
REEL for the models on S-REEL and only T-REEL
for other models)
b) If the C-FG pulse is not impressed for a lapse of 1
sec. or more during the CAPSTAN MOTOR rotation,
it shall be MOTOR Rotation Malfunction (REEL Mal-
function).
2) DRUM Malfunction detection
Detect the DRUM rotation at the D-FG input termi-
nal.
If the variation of D-FG input level is not detected for
a lapse of 1 sec. or more when D-CONT is "H", it
shall be assumed to be Rotation Malfunction and be
DRUM Malfunction.
When detect Drum Malfunction, POWER shall be
turned OFF after the unit switches over to STEP (B)
Mode.
T5200MTI