PCC D3400 - Page 100

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SERVOPCBA
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LOGIC PCBA
LINE SYNCHRONIZER
IZERO CROSSING
DETECTOR)
AC REFERENCE~
IliNE FREQUENCY)
RAMP
GENERATOR
PORTION
OF
SECTOR ELECTRONICS
CLOCK
SIGNAlll~
ClOCK SIGNAlll~
CLOCK SIGNAlll~
SPEED CONTROL
PROGRAMMING
SPEED CONTROL
COUNTER
DISK
SPEED COUNT
PROGRAMMING
PURGE CYCLE IlPCFF)--.J
PURGE CYCLE INLPCFF)-----'
PHASE LOCK FLIP-FLOP IlPlFF)
VOLTAGE
DRIVE MOTOR
ENABLE INLDMEG)'--t--+-------------- ..... -t I
COMPARATOR
AND .... t-'T'"---t---1~
CONTROL GATES I
~---~
START DRIVE MOTOR INLSDMGl------~r------l
L
DRIVE MOTOR ENABLE ILDMEG)---- .... ~"i
SPEED VALUE
FLIP-FLOPS
SPEED SEQUENCE
CONTROL
SPEED STATUS
FLIP-FLOPS
I
I
NliMSI
CLAMPED I
INTEGRATOR
AND I
OUTPUT CONTROL
II I
I """" ~
lJ-_ --.-
BRAKE CYCLE ENABLE INlBCEG)-
SPEED OUT OF
.... --------- .... TOLERANCE ILSOTF)
READY ILRXXG)--- ..... "i
GATE
DISK SPEED
~---~ ERROR INLSDEG)
OPTO-ISOLATOR
L
SEPARATE SECOlNDARY
WINDINGOIN
POWER TRANSFORMER
I
,
MOTOR CAPACITORS
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SEPARATE DC POWER SUPPLY _
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+
CURRENT
AMPLIFIER
TRANSISTOR
SWITCHES
TRIAC SWITCH
INTERCONNECTION
WIRING ANO CONNECTORS