Brother International HS-5300 Service Manual - Page 28

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1.4.5 Heater Drive Circuit The heater drive circuit is used to drive the heater which heats up the platens (pre-platen and platen), the head and the OHS tank. The engine CPU turns ON or OFF the heater through the Jet ASIC3. When the control signal output from the Shift Register is low, the heater is turned ON and heats the corresponding platen. Main PCB i < Engine CPU > Jet ASIC3 SCLK SDATA SLATCH MSENA Driver PCB Shift Register HT_PPLATEN HT_PLATEN Heater Driver +52V ....ri o P10 • nP11 Platen Heater HT OHS HT_FE1 HT_FE2 HT BE Heater Driver Fig. 2.7 v CR PCB +52V 1 > Head Heater Main PCB Engine < CPU Jet > ASIC3 I Driver PCB Head Driver CR Ip. PCB Head vi. Fig. 2.8 11-9

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1.4.5
Heater
Drive
Circuit
The
heater
drive
circuit
is
used
to
drive
the
heater
which
heats
up
the
platens
(pre
-platen
and
platen),
the
head
and
the
OHS
tank.
The
engine
CPU
turns
ON
or
OFF
the
heater
through
the
Jet
ASIC3.
When
the
control
signal
output
from
the
Shift
Register
is
low,
the
heater
is
turned
ON
and
heats
the
corresponding
platen.
Engine
CPU
Main
PCB
<
>
Jet
ASIC3
Engine
CPU
i
Driver
PCB
+52V
Platen
o
P10
Heater
SCLK
HT_PPLATEN
•
....
ri
Shift
Register
Heater
Driver
P11
n
SDATA
HT_PLATEN
SLATCH
MSENA
HT
OHS
HT_FE1
Heater
HT_FE2
Driver
HT
BE
Fig.
2.7
Main
PCB
I
Driver
PCB
<
>
Jet
ASIC3
Head
Driver
v
CR
PCB
+52V
1
Fig.
2.8
CR
PCB
>
Head
Heater
Ip.
vi.
Head
11-9