Component Locking - Epson PX-8 Technical Manual

REV.-A
Print pattern
~ ~=t:!J~-'-'&f
Board Through hole
Print pattern (Copper foil or copper foil plated with
solder)
Fig. 6-7 Section of Board
6.4 Component Locking
This computer is portable and may be often subjected to vibrations and shocks. Thus, measures
are required to prevent any failure due to possible loose screws, variable resistor adjustment de-
viations, poor contacts of cables and jumpers, etc. The following measures should be taken after
any circuit board or other component replacement or variable register readjustment, etc.
6.4.1 Variable Resistor Locking
After a variable resistor is readjusted, apply a
small amount of silicon lock on the variable re-
sistor as shown in Fig. 6-8.
Care must be used to keep the driver groove
free from the lock agent.
6.4.2 Screw Locking
After any circuit board is replaced or any micro-
cassette tape drive azimuth adjustment is
made, apply a small amount of screw lock
agent on the fixing screws or the azimuth ad-
justment screw as shown in Fig. 6-9.
6.4.3 Ensuring an FPC Cable Connection
Before disconnecting/connecting any FPC ca-
ble, unlock its connector. When connecting an
FPC cable, make sure that the cable end
reaches the bottom of the connector before
locking the connector.
6-7
Movable screw head Silicon lock
Driver groove
Fig. 6-8 Variable Resistor Locking
Screw lock agent
Fig. 6-9 Screw Locking
~----- ::;;~I­
%%%%Z~z~zz~_Lz,
Locked
Unlocked
Fig. 6-10 FPC Cable Connection/
Disconnection