Centron Technologies MS930A, Service Manual

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3 - 6
An ENABLE/DISABLE selector switch is prepared on the rear panel of each sealing
head unit. If the selector switch is selected at DISABLE, the sealing head unit does not
work even if an ENABLE command is given in remote command mode.
On each sealing head units are two LED indication lamps. The green READY lamp is
turned on when the ENABLE/DISABLE selector is set at ENABLE position. The red
SEALING lamp is turned on only while sealing is being done. Both lamps will be off if
the ENABLE/DISABLE selector switch is set at DISABLE position.
When tubing melts, two parts of sealing head come close, hence the limit switch in the
sealing head is depressed. This signal from limit switch goes to control board and turns
RF power generation of the sealing head unit off.
3-10. Switch Board
An ENABLE/DISABLE selector switch is prepared on the switch board. If the selector
switch is set at DISABLE, the sealing head unit does not work even if an ENABLE
command is given in remote command mode.
3-11. Trigger Board
The Trigger board is mounted on sealing-head structure in the sealing-head unit. The
board houses a trigger micro-switch and two LED indication lamps that display either
READY or SEAL status.
3-12. Matching Board
The Matching board locates in the sealing-head unit. On the board is an impedance
transformer called loading coil. It transforms RF board impedance to sealing-head
impedance.