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E05B04
1.5.2
SIMM Board
ROM
This printer can use an optional ROM SIMM board. It is a code ROM for other software modes.
1.5.3 PWB-E Board
The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts
the AC line voltage into +12 V and +5 VDC voltages. There are two types of power supply board,
the 120V and 220/240V type. The difference between the two circuits is only in the input section.
Do not touch VRIE on PWB-E board, as it is set at the factoy and should not be changed.
Rev. A
Figure 1-17. C144 MAIN Board
Figure 1-18. PWB-E Board
General Description
, R O M (IC8)
ROM (IC17)
' R O M (IC18)
\
CPU (IC6)
1-25
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