Samsung VP-L900 Training Manual page 89

Circuit Operating Description
(2) Reel Rotate Check
The rotation of the Reel is detected by the pulse which occurs from the photo TR which is located in sub pcb of
the take-up/supply of the mecha. When the capstan motor was not detected is rotating reel pulse, the reel
rotation stopped, it judges.
The capstan the motor rotation stops, the tape take-up control is accomplished.The mecha the ready (stop)
moves with a location.
When the pulse did not become the input during the next period and the reel stood still, it judges.
- Even in detection of TAPE-PRE END use (REC from mode about 5 minutes)
IC601
MICOM
T REEL FG
S REEL FG
! Sensor output
@ Micom input
6-10
Mode
FF,REW,FR-SEARCH
CUE,REV
PLAY,REC
etc
IC502
MOTOR DRIVE
(
*
@
<Table 6-7>
NTSC : 126ms , PAL : 120ms
NTSC : 342ms , PAL : 257ms
NTSC : 2.4s , PAL : 1.8s
700ms
!
43 SS 5V
1
32 T REEL
^
35 R REEL
33 TR LED(-)
Fig. 6-9
Stop time
CN501
3V min
2V max
Samsung Electronics