Check Items And Cautions; Off Current Check; On Current Check; Ram Capacity Check - Sharp PC-1246 Service Manual

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1 0. LCD (LF7133E)
9-6. Auto-power-off check
Display must not go out within 8 minutes but should go
out within 14 minutes.
9-4. At a time of battery replacement
After replacement of the battery, turn power on and push
the RESET switch.
9-3. RAM capacity check
Turn the slide switch ON, push the
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MODE
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switch to go
into the PRO mode. Enter
[NJ [EJ [WJ [QJ
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ENTER
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and
[MJ ~
[ENTER] to have the following figure on
the displav.
PC-1246: 1278
PC-1247: 3326
+
Short or open ON
with GND
'\__J
ON GND
At the time of on with the sli d e switch at" ON position
115µA at VGG
=
-0.6V, maximum
9-2. On current check
DC regulator
circuit
+
Short the OFF Pad
with B11 pad
GND
\___J
OFF Bll
At the time of off with the slide switch at OFF position
7µA at VGG
=
-6.0V, maximum
9-1. Off current check
-
PC-1246
PC-1247
9. CHECK ITEMS AND CAUTIONS