Main Board; Outline Of The Main Board; Environmental Conditions; Power Supply Specifications - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

2.3.3 Main Board

2.3.3.1 Outline of the Main Board

C583Main consists primarily of the three following sections.
Common section and printer section
Logic circuits (ASIC incorporated in the CPU core, ASIC for cards, Flash
ROM x 2, and SDRAM x 3)
Motor control and drive circuits (PF, CR, APG, Pressurization, ASF, Pump)
Head control and drive circuit
Interface circuit (USB 2.0, USB 1.1 Host)
LED circuit
Sensor circuits (PE, PW, APG, CDR 1 and 2, Stacker, Ink cartridges door, Ink
supply system pressure / pressurization)
RTC circuit
Regulator circuit
Overvoltage protection circuit
Color LCD interface
Panel interface
Card ASIC section
Logic circuit (ASIC)
Card power supply control circuit
Scanner section
Scanner interface circuit
Motor control and drive circuit (Scanner)
Scanner HP detection interface circuit
TPU interface circuit
Operating Principles

2.3.3.2 Environmental Conditions

Operating temperature:
Operating humidity:

2.3.3.3 Power Supply Specifications

Supply voltage for main power system: 42 V ±5%, 0.8 A (Max 2.5 A)
Supply voltage for scanner system:
Supply voltage for logic system:
5 V ±5% (for 10 ms at startup +10%) 1.2 A
3.3 V ±5% (for 10 ms at startup +10%) 0.8 A (Max1.2 A)
1.5 V ±5% (for 10 ms at startup +10%) 0.8 A (Max1.2 A)
Output voltage control by the secondary side power switch:
If the power cable is unplugged when the power is ON, the voltages (3.3 V and 5
V) for the logic system are maintained for at least 350 msec. after the voltage for
the main power system has lowered below 32 V (Typ. 36.0 V, Max. 38.1 V).
Operating Principles of Electric Circuitry
0 ~ 70°C inside the case
30 ~ 70%RH inside the case (no condensation)
12 V +5% -3.5%, 0.15 A
Revision A
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