3 ] Powering Failure (Nothing Appears On The Lcd - Brother PT-H100 Service Manual

[ 3 ] Powering failure (Nothing appears on the LCD.)

When driven by dry cells:
Are the specified
dry cells loaded?
(alkaline batteries:
LR03)
Y
Are the dry cells
loaded with right
polarity?
Y
Is the machine hung up?
N
Are the battery terminals
A and B broken?
N
Is the + or -
battery terminal lead
of the key PCB
broken?
N
C
Pressing the key does not turn
the machine on; nothing appears
on the LCD.
N
Replace them with the
specified ones.
N
Correct the loading
direction.
Turn the machine off. While holding
Y
down the Shift and R keys,
press the
machine.
Y
Replace the battery terminals A and B.
Y
Replace the key PCB.
Is the specified
*
AC adapter
key to initialize the
IV - 9
When driven via the
optional AC adapter*:
* AD-24ES
(only H105)
N
connected?
Y
Replace the AC adapter
with the specified one.
*