DP120F/DP125F Circuit Description
7-26
March 2000 © TOSHIBA TEC
3. MAIN PBA
This section describes the functions of each circuit on the Main PBA.
The Main PBA is the main control center of this machine. With the CPU (IC66) as the central
component, it consists of the DMAC GA (IC16) for DMA transfer control, PTC GA (IC45) for
printer control, I/OP-1 GA (IC7) and I/OP-2 GA (IC48) for control of each I/O, Sub-CPU (IC37)
for control of low power consumption operation, and other peripheral devices.
CPU (IC66)
• Control of each GA
• Memory control
• Bus control
• Interrupt control
DMAC GA (IC16)
• DMA transfer control
• Memory control
• Control of communication circuits
• Interrupt control
• Generation of speaker clocks
• Watchdog timer function
PTC GA (IC45)
• DSC (Document Scan Control) control
• EET (Edge Enhancement Technology) control
• LSU control
• Fuser control
• Toner empty detection
• Drum unit and Developer assembly detection
• CODEC (MH, MR, MMR, JBIG) control
• TX motor control
• Top cover open detection
• Scanner cover open detection
• PC interface
• Generation of print clocks
Summary of Contents for DP120F
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Page 656: ...DP120F DP125F Troubleshooting 11 44 March 2000 TOSHIBA TEC ...
Page 700: ...DP120F DP125F Appendix 12 2 March 2000 TOSHIBA TEC 1 2 Error Count List ...
Page 701: ...March 2000 TOSHIBA TEC 12 3 DP120F DP125F Appendix 1 3 Function List for Maintenance ...
Page 702: ...DP120F DP125F Appendix 12 4 March 2000 TOSHIBA TEC 1 4 Drum Unit ...
Page 703: ...March 2000 TOSHIBA TEC 12 5 DP120F DP125F Appendix 1 5 Memory Dump List ...
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