DOT MATRIX PRINTER USERS MANUAL DP8340

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VAC 14V C2 100 ~ 200µF/25V
VDC 12V ZD1 VZD = 14V (1W)
IAC 2 ~ 3A C3 4700 ~ 6800µF/25V
C1 6800µF/25V TR1 2SD633 (TOSHIBA)
Other parameters may be determined by user.
Figure 10-1. Power Supply Reference Circuit
+10%
–5%