5.2 CPU Peripheral Circuit
5.2.1 PC-8201 Power Supply Operation Test
(
Reference
)
Chaptcr
4
DISASSEMBLY/REASSEMBLY
(I) Measured power supply
PIN No. 3
-5
V
PIN No. 6
5
V
(within +lo% to
-5%)
*
If power supply operation is abnormal. see Item
6.2.1
"PC-89-01 Abnormal
Power Supply".
5.2.2 Reset Operation Test
AS soon as the power supply is turned on or reset is depressed, the RESET signal in U17,
80C85, (P36) changes from
"H"
level to
"L"
level
and
the RESET OUT signal in
U17
(P3)
changes from
"L"
level to
"H"
level.
Figure
5.1
Reset
Operating
Test
*
If
reset
is
abnormal. see Item 6.2.9- "PC-8301 Abnormal Reset"
To Next Page
Loading...
