3
Remarks:
PARTS CATALOGUE
Cal. S140A, S143A
TECHNICAL GUIDE
•
The explanation here is only for the particular points of Cal. S140A and S143A.
•
For the repairing, checking and measuring procedures, refer to the “TECHNICAL GUIDE, GENERAL
INSTRUCTIONS”.
I.
STRUCTURE OF THE CIRCUIT BLOCK
II.
REMARKS ON BATTERY REPLACEMENT
Cal. S140A, S143A
15
Liquid crystal panel 4520 504
The type of liquid crystal panel is determined based on the design of cases. Check the case number and
refer to “SEIKO Casing Parts Catalogue” to choose a corresponding liquid crystal panel.
Cal. S140A
Cal. S143A
C-MOS-LSI
Input terminal (+)
Input terminal (–)
Crystal unit
C-MOS-LSI
Input terminal (+)
Input terminal (–)
Jack lead terminal
•
Remarks on installing the battery
· Keep the battery level while installing it lest it should
touch the circuit block cover.
· Be careful not to short-circuit the battery connection (–)
and the circuit block cover. In that case, the display may
remain blank after the battery is installed.
* If the display remains blank, wait until the battery voltage
returns to the normal level. The normal display will
return.
Example of short circuit
