Panasonic DP-1510P, Service Manual

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335
DP-1510P/1810P
/1810F/2010E
APR 2002
Edition 2.0
1. Document Adaptor for New Copier Engine (Gate Array)
DZAC000234 (DANCE) is a Document Adaptor for New Copier Engine (Gate Array) and provides the
Image Control peripheral function and Recording Data Control.
• DMA Control
It is used to transfer data between the following devices.
• Rotation Management
The rotation is carried out by the hardware when transferring the route.
• S-DRAM Control
It generates S-DRAM Control Signal for Page memory and Refresh Control when the power is ON. It
does not backup the Page Memory.
• PDL Data Transfer
When installing the PDL Option, the actual coded data is retrieved on the PDL side first and is
transferred to Page Memory (S-DRAM). Then, the coded data is transferred to the PDL Option on the
System side.
• Binary Gray Scale Conversion
The signal of a binary-level image such as copying is converted into a multiple-value (256-scale)
image signal. The signal is transferred to an external PWM control LSI for multiple-value recording.
A maximum of 7-by-7 pixels around an area is referred to in layers for conversion into multiple-value
signal.
• Gray-Level Enhancement
This control function allows expressing higher-level scales than using a recorded signal, by reducing
line density into 1/2 or 1/3 on the original after binary-to-multiple value conversion. This capability
increases reproduction of gray scale images such as photographs.
• Laser Pulse Width Control
After smoothing, the IPC controls Laser pulse width by the software setting of the print quality.
• Image Range Isolation Circuit
It identifies the halftone picture range and controls smoothing, Binary Gray Scale Conversion, and
Laser pulse width control to eliminate blotching of the recording picture which has undergone error
diffusion or other process.
Scanning Control LSI (MN86076)
→
Page Memory (S-DRAM) : Scanning Route
Page Memory (S-DRAM)
→
Sort Memory Control Gate Array
(BRIDGE) : Coding Route
Sort Memory Control Gate Array
(BRIDGE)
→
Page Memory (S-DRAM) : Decoding Route
Page Memory (S-DRAM)
→
PMW Control LSI (LP) : Recording Route
System Memory (DRAM)
→
Page Memory : Report Route
Page Memory (S-DRAM)
→
CODEC for Image (PM-22c) : Rotation (Send)
Page Memory (S-DRAM)
→
PMW Control LSI (LP) : Copy, Rotation (Receive)