Sharp VC-A400U

33
VC-A400U
VC-H800U




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0 5
10 15 20 25
F mechanical timing
Mode
Rotation angle
Mode check
Cam mark
Mode detection outside (D709 SW B) Mode detection inside (D708 SW A)
Cam graph E
60 120 180 240
300 360
CA/END CS/EJ 33.82
UL 81
VSR 218
PU(LD) 188
PB 252
SLOW 269 293
FF 309
STOP 325
Cam switch
0
Mode detection outside Mode detection inside S sensor
S sensor
Mode detection inside
Sensor A
Mode detection outside
Sensor B
CS/EJ
ULD
PU LD
VSR
PB
STILL
FF
STOP
1 1 1 0 0 0 0 0
0 1 1 1 0 1 0 0
open
close
0 1
EJ
UL
STP
PU
0 1 1
0 0 0
0 1 1 or 0
1 1
1
00
100000
1
1
1
1
1 1
VSR
PB
SLW
FF
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Loading motor turns in reverse direction and master cam counterclockwise.
CASSETTE INSERTION STOP
Cassette inserting
Full- loading
YES YES YES
NO NO NO
Unloading
Loading motor starts in normal direction and master cam counter clockwise.
Does mechanism position sw. come off within 2.5 sec.?
Are start/end sensors at low level before cassette insertion ?
Insert cassette.
Double action rack slides.
Drum motor starts.
Tape loading.
Pinch roller comes into contact.
Cam switch is at PB position.
Loading motor stop.
Is drum FG pulse outputted ?
End
End
Cassette is ejected and loading motor stops.
Start sensor close.
(Cassette is judged caught halfway.) (Cassette LED or some other part is judged defective.)
6. MECHANISM OPERATION FLOWCHART AND TROUBLESHOOTING GUIDE
MECHANISM OPERATION FLOWCHART
* This flowchart describes the outline of the mechanism’s operation, but does not give its details.