PC-1600
2. Remove the eleven screws (see figure) and remove the
key PWB (with the
FPC PWB) from the top cabinet.
Screw
Fig.8-4
NOTE:
00 not drop the rubber connector
and rubber
spring sheet that are used to hold the soft key.
If the electrically conductive part of the rubber
connector
were to be contaminated,
it could
be a cause of a failure after the assembly of the
unit.
3. Generally, the FPC PWB should not be used again once
removed from the key PWB because the soldered pattern
might separate from the board.
Since the
key
PWB is bonded
to the FPC PWB, to
remove, hold the shadowed portion at (A) with a double
tack tape and warm the area with a hair dryer; then
separate this portion
from the solder using a soldering
pencil.
'l/.l7D./T iT./T./TiT.iT/.lIIII/17/ItTtTt.T/.ll./lJ
0
zaa
OlZ/ll./VOO
zazraa»
D
D
D
\
1- --_. -----
----------
(Al
Fig.8-5
-16-
NOTE:
This job is required for the reuse of the key
PWB.
4. How to solder the FPC PWB with the key PWB
(1
I
Apply a thin layer of solder over the soldered portion
of the FPC PWB.
(2) Cut away 1.5 to 2.0 millimeters of the tip of the FPC
PWB using
a knife
or scissors,
in order
to check
wh ether the solder melted at the exposed portion
®
of the key PWB will function when heating at
(4).
(3)
Remove the backing
paper of the double
tack tape
bonded on the back of the FPC and temporarily
fit the
FPC PWB to the key PWB.
(41
Using a soldering pencil heated to 260°
± 5°C
and a
pair of tweezers,
hold
the
FPC with
the
tweezers
because
the
FPC may separate
when
heated
from
above. After removing the pencll, hold the FPC with
the tweezers for five seconds more.
1.5-2.0mm
Fr===9
1.5-2.0mm
-~=t
FPC
unit
FPC
unit
Fig.8-6
Summary of Contents for PC-1600
Page 42: ... 11 CIRCUIT DIAGRAM PARTS POSITION KEY P W B LCD SIDE 39 ...
Page 43: ...PC l600 40 ...
Page 44: ...PC 1000 KEY P W B LSI SIDE 41 ...
Page 45: ... 42 ...
Page 48: ... PC l600 F P C P W B 45 ...
Page 49: ... Kn 46 ...
Page 52: ... PC l600 CONNECTOR P W B 49 ...
Page 53: ... 50 ...
Page 55: ... __ PC l600 tli I ONLY Pc 1600K I I 1 I 52 l J ...
Page 56: ... PC l600 K MEMORY P W B ROM Cut c IJ O lJ1F C O lJ1F I Bend capacitor to inward ROM SIDE 53 ...
Page 57: ...RAM SIDE 54 ...
Page 61: ...I I 2 3 4 42 58 ...
Page 93: ... P W B LSI SIDE t 90 ...
Page 117: ... PC I600 ...