2DF
2-3-14
The operation unit PCB (OPCB) consists of the operation unit left PCB (OPCB-L) and the operation unit right PCB (OPCB-
R).
The operation unit right PCB (OPCB-R) consists of key switches and LEDs. The lighting of LEDs is determined by scan
signals (SCAN5 to SCAN8) and LED lighting selection signals (DIGLED7 to DIGLED8) from the main PCB (MPCB). The
key switches operated are identified by the scan signals (SCAN5 to SCAN8) and the return signals (DIGKEY4 to
DIGKEY9).
As an example, to light LED 1 (L1), the LED lighting selection signal (DIGLED7) should be driven low in synchronization with
a low level on the scan signal (SCAN5). LEDs can be lit dynamically by repeating such operations.
As another example, if KEY 1 is pressed, the corresponding key switch is turned on feeding the low level of the scan signal
(SCAN5) back to the main PCB (MPCB) via the return signal (DIGKEY4). The main PCB (MPCB) locates the position where
the line outputting the scan signal and the line inputting the return signal cross, and thereby determines which key switch
was operated.
The operation unit left PCB (OPCB-L) consists of key switches and LEDs. The lighting of LEDs is determined by scan
signals (SCAN1 to SCAN4) and LED lighting selection signals (DIGLED1 to DIGLED6) from the main PCB (MPCB). The
key switches operated are identified by the scan signals (SCAN1 to SCAN4) and the return signals (DIGKEY1 to
DIGKEY3).
As an example, to light LED 7 (L7), the LED lighting selection signal (DIGLED1) should be driven low in synchronization with
a low level on the scan signal (SCAN1). LEDs can be lit dynamically by repeating such operations.
As another example, if KEY 23 is pressed, the corresponding key switch is turned on feeding the low level of the scan signal
(SCAN1) back to the main PCB (MPCB) via the return signal (DIGKEY1). The main PCB (MPCB) locates the position where
the line outputting the scan signal and the line inputting the return signal cross, and thereby determines which key switch
was operated.
Summary of Contents for Ri 2530
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Page 326: ...AD 63...
Page 329: ...3CX 1 1 2 1 1 2 Part names Figure 1 1 1 Duplex unit...
Page 330: ...3CX 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Paper path Duplex unit...
Page 346: ...DF 78...
Page 349: ...3B5 1 1 2 1 1 2 Part names Figure 1 1 1 1 Intermediate tray 2 JAM release lever 3 Eject tray...
Page 383: ...J 1402...
Page 386: ...3B6 1 1 2 1 1 2 Part names Figure 1 1 1 1 Job separator tray 2 LED...
Page 387: ...3B6 1 1 3 1 1 3 Machine cross section Figure 1 1 2 Paper path...
Page 388: ...3B6 1 1 4 1 1 4 Drive system Figure 1 1 3 1 Gear 20 2 Gear 28 3 Gear 28 4 Eject roller gear...
Page 399: ...PF 70...
Page 401: ...1 1 2 3CC 2 4 Appendixes Timing chart No 1 2 4 1 Timing chart No 2 2 4 2 Wiring diagram 2 4 3...
Page 403: ...3CC 1 1 2 1 1 2 Parts names 1 Upper drawer 2 Lower drawer 3 Desk left cover Figure 1 1 1 3 1 2...
Page 404: ...3CC 1 1 3 1 1 3 Machine cross section Paper path Figure 1 1 2 Machine cross section...
Page 436: ...RA 1...
Page 438: ...3CP 1 1 1 1 1 1 Part names Figure 1 1 1 Switchback unit Switchback unit open close lever...
Page 439: ...3CP 1 1 2 1 1 2 Machine cross section Figure 1 1 2 Paper path Switchback unit...
Page 456: ...PF 75...
Page 458: ...1 1 2 5FF 2 4 Appendixes Timing chart No 1 2 4 1 Timing chart No 2 2 4 2 Wiring diagram 2 4 3...
Page 461: ...5FF 1 1 3 1 1 3 Machine cross section Paper path Figure 1 1 3 Machine cross section...
Page 499: ...Fax System C...
Page 501: ...1 1 2 3CM...
Page 509: ...3CM 1 1 8...
Page 553: ...3CM 1 3 40...
Page 565: ...3CM 1 5 2...
Page 570: ...3CM 2 1 2...
Page 581: ...Fax System F...
