Epson Stylus 500 Service Manual

EPSON COLOR INKJET PRINTER

Stylus-500

SERVICE MANUAL

EPSON

4006359

PREFACE

This document provides supplementary information to describe the EPSON Stylus COLOR 500, which is a follow-on version of the EPSON Stylus COLOR II. Therefore, you must refer to this information in conjunction with the EPSON Stylus COLOR II Service Manual for details on any subjects common to both printers.

-i-

EPSON Stylus COLOR 500 Service Manual Product Description

1.1 FEATURES

The EPSON Stylus COLOR 500 is a small-footprint, personal-use color ink jet printer. The major new features of this printer are:

❏ Newly developed black and color inks

High-quality black printing Deep color printing

❏ Simple control panel operation

3 No lock switches 4 LED lamps

❏ A new design for the left guide edge locking mechanism in the ASF (auto sheet feeder)

Table 1-1. Consumables

Model Description

S020093 S020097 Color ink cartridge S041059 S041025 S041060 S041061 EPSON premium paper for 720 dpi printing (A4) S041026 S041062 EPSON premium paper for 360 dpi printing (Letter) S041067 S041048 S041071 S041072 High-quality glossy paper (Letter) S041063 S041064 S041054

Monochrome ink cartridge

EPSON premium paper for 360 dpi printing (A4) EPSON premium paper for 360 dpi printing (A4)

EPSON premium paper for 360 dpi printing (Letter)

EPSON premium paper for 720 dpi printing (A4)

EPSON premium paper for 360 dpi printing (Legal) EPSON premium paper for 360 dpi printing (Legal)

High-quality glossy paper (A4)

Transparency film (A4) Transparency film (Letter) EPSON premium card stock for 720 dpi printing (A6)

Rev.A 1-1

Product Description EPSON Stylus COLOR 500 Service Manual

1.2 SPECIFICATIONS

This section provides detailed information about the EPSON Stylus COLOR 500.

1.2.1 Printing Specification Table 1-2. Character Tables and Typefaces

Bitmap fonts Scalable fonts

EPSON Roman EPSON

Character Tables

Sans Serif EPSON Courier EPSON Prestige EPSON Script

EPSON Roman EPSON Sans Serif

EPSON Roman T EPSON Sans Serif H

Standard version

NLSP version

Italic PC437 (U.S., Standard Europe) PC850 (Multilingual) PC860 (Portuguese) PC861 (Icelandic) PC863 (Canadian-French) PC865 (Nordic) BRASCII Abicomp

Italic PC437 (U.S., Standard Europe) PC850 (Multilingual)

PC437 Greek PC852 (East Europe) PC853 (Turkish) PC855 (Cyrillic) PC857 (Turkish) PC866 (Russian) PC869 (Greek) MAZOWIA (Poland) Code MJK (CSFR) ISO 8859-7(Latin/Greek) ISO Latin 1T (Turkish) Bulgaria (Bulgaria)

Supported Supported Supported

Supported

Supported Supported

Not supported

1.2.2 Electric Specification

Power consumption 120v Approx.18W (ISO10561 Letter pattern)

220-240V Approx. 18W (ISO10561 Letter pattern) Energy Star compliant

1-2 Rev.B

DATA (n)

DATA

-STROBE

BUSY

-ACKNLG

500 ns (min.)

500 ns (min.) 500 ns (min.)

0 (min.)

500 ns ~10 µs

0 (min.) 500 ns (max.)

DATA (n+1)

* : The rise and fall time of every output signal must be less than 120 ns. The rise and fall time of every input signal must be less than 200 ns.

EPSON Stylus COLOR 500 Service Manual Product Description

1.3 INTERFACES

1.3.1 Hardware Interfaces

This section fully describes the EPSON Stylus COLOR 500 interfaces. The printer offers both a parallel and serial interface, standard.

1.3.1.1 Parallel Interface

Forward Channel

Transmission mode: 8 bit parallel, IEEE-1284 compatibility mode Synchronization: Handshaking: BUSY and Signal level: TTL compatible level (IEEE-1284 level 1 device) Connector type: 57-30360 (Amphenol or equivalent)

STROBE pulse

ACKNLG signal

The BUSY signal is set to HIGH before either

ERROR is set LOW or PE is set HIGH, and BUSY is held

HIGH until all these signals return to the inactive state. The BUSY signal goes HIGH in the following cases:

• During data entry (See data transmission timing).

• When the input data buffer is full.

• When the

• During a printer error condition (see

INIT signal is at a LOW level, or during hardware initialization.

ERROR signal).

• During self-test printing.

• In default setting mode.

• When the parallel interface is not selected.

The

ERROR signal is LOW when the printer is in one of the following conditions:

• Printer hardware error (fatal error condition).

• Paper-out error.

• Release lever operation error.

The PE signal is HIGH during a paper-out error.

Rev.A 1-3

Figure 1-1. Data Transmission Timing

Product Description EPSON Stylus COLOR 500 Service Manual

Table 1-4 shows the connector pin assignments and signals for the 8-bit parallel interface.

Table 1-3. Connector Pin Assignments and Signals (Forward Channel)

Pin No. Signal Name

2 ~ 9 DATA 0 ~ 7 20 ~ 27

10 ACKNLG 28

11 BUSY 29

12 PE 28 O

13 SLCT 28 O 14

15 NC — — Not connected.

STROBE 19 I

AFXT 30 I

INIT 30 I

Return

GND Pin

I/O Description

This is strobe pulse. Reading of data is performed at the falling edge of this pulse.

Signals DATA0 ~ DATA7 represent data bits 0 to 7, respectively. When a DATA signal is

HIGH, the data is logical 1 and when LOW, data is logical 0.

This signal is a negative pulse indicating that

the printer can accept more data. When this signal is HIGH, the printer cannot

receive data. When this signal is HIGH, the printer detects a

paper-out error. This signal is always HIGH when the printer is

powered on.

The falling edge of a negative pulse or a LOW signal on this line causes the printer to initialize. A 50 µs pulse, minimum, is

necessary. 32 36

18 Logic H — 35 +5 V — 17 Chassis GND —

16, 33

19 - 30

15, 34 NC —

ERROR 29

SLIN 30

GND —

When this signal is LOW, the printer detects an

error.

Not used.

Pulled up to +5 V via 3.9 KΩ resistor.

Pulled up to +5 V via 3.3 KΩ resistor.

—

Chassis ground.

—

Signal ground.

—

Not used.

1-4 Rev.B

EPSON Stylus COLOR 500 Service Manual Product Description

Reverse Channel

Transmission mode: IEEE-1284 nibble mode. Connector: See forward channel. Synchronization: Refer to the IEEE-1284 specification. Handshaking: Refer to the IEEE-1284 specification. Data transmission timing: Refer to the IEEE-1284 specification. Signal level: Refer to the IEEE-1284 specification.

Table 1-4. Connector Pin Assignments and Signals (Reverse Channel)

Return

Pin No. Signal Name

1 Host Clk 19 I Host clock signal.

2 ~ 9 DATA0 ~ 7 20 - 27 I

GND

I/O Description

DATA0 ~ DATA7 signals represent data bits 0 to 7, respectively. Each signal is at a HIGH level when data is logical 1 and at a LOW level when data is logical 0. These signals are used to transfer the extensibility request values (described in IEEE-P1284) to the printer.

10 PtrClk 28 O Printer clock signal. 11

13 14 Host Busy 30 I Host busy signal.

31 32 36 1284-Active 30 I Active signal for IEEE-P1284 mode.

18 Logic-H 35 +5 V — O 17 Chassis GND —

16, 33

19 - 30

15, 34 NC — — Not connected.

Ptr Busy /

Data Bits 3, 7

Ack Data Req /

Data Bits 2, 6

Xflag / Data Bits 1,

INIT 30 I Not used.

Data Avail /

Data Bits 0, 4

GND — — Signal ground.

29 O

28 O

29 O

—

Printer busy signal and reverse channel transfer data 3 or 7.

Acknowledge data request signal and reverse channel transfer data bit 2 or 6.

X-flag signal and reverse channel transfer data bits 1 or 5.

Data available and reverse channel data bits 0 or 4.

Pulled up to +5 V via 3.9K Ω resistor. Pulled up to +5 V via 3.3K Ω resistor.

—

Chassis ground.

Note: I / O refers to direction of the signal flow from the view of the printer.

Rev.A 1-5

Product Description EPSON Stylus COLOR 500 Service Manual

Extensibility Request

Device ID The printer sends following device ID string when it is requested:

The printer responds affirmatively when the extensibility request values are 00H or 04H. That means:

00H: Request Nibble Mode Reverse Channel Transfer 04H: Request Device ID;

Return Data Using Nibble Mode Channel Transfer.

ESC/P2 mode X24E mode 00H 3AH 00H 3BH MFG: EPSON; MFG: EPSON; CMD:ESCPL2-00 CMD: PRPXL24-00 MDL: Stylus COLOR 500; MDL: Stylus COLOR 500; CLS: PRINTER; CLS: PRINTER;

Note: 00H denotes a hexadecimal value of zero.

1-6 Rev.B

EPSON Stylus COLOR 500 Service Manual Product Description

1.4 POWER AND CONTROL PANEL OPERATIONS

This section describes the controls used to operate the EPSON Stylus COLOR 500.

1.4.1 Power Switch

The Power switch is in the right rear corner of the printer.

CAUTION

This switch is for the primary power supply circuit. Therefore, you must put the printer in the waiting condition to make it cap the head before power off.

1.4.2 CONTROL PANEL

The control panel for this printer is in the center of the upper case. The panel has 3 non-lock type pushbuttons and 4 LEDs.

Power

Ink Out

Paper Ou t

Cleaning

Figure 1-2. Panel Appearance

1.4.2.1 Buttons and Indicators

Cleaning (Black)

This button makes the printer perform the black head cleaning.

Cleaning (Color)

This button makes the printer perform the color head cleaning.

Load / Eject

This button loads and ejects paper.

❏ After you hold down Load / Eject for 3 seconds, the printer carriage moves to the ink cartridge installation position. When Load / Eject is pressed again, the CR returns to the home position.

Cleaning Load / Eject

Rev.A 1-7

Product Description EPSON Stylus COLOR 500 Service Manual

Indicators

Power

Lights when the printer’s Power switch is On, and AC power is supplied.

Ink Out (Black)

Lights when there is no ink in the black ink cartridge, and blinks when the black ink cartridge is low.

Ink Out (Color)

Lights when there is no ink in the color ink cartridge, and blinks when the color ink cartridge is low.

Paper Out

Lights during a paper out, and blinks during a paper jam.

1-8 Rev.B

EPSON Stylus COLOR 500 Service Manual Product Description

1.4.3 Panel Functions at Power On

The table below gives functions for different button combinations at power on.

Table 1-5. Panel Functions at Power On

Button Pressed along with Power On

Cleaning (Black) Starts demonstration print. Load / Eject Enters the default setting mode. Load / Eject + Cleaning (Black) Enters the printer adjustment mode. Cleaning (Color) Starts LQ self-test printing. Load / Eject + Cleaning (Color) Enters the ink smudge prevention mode. Cleaning (Black) + Cleaning

(Color) Load / Eject + Cleaning (Black)

+ Cleaning (Color), Load / Eject less than 3 seconds

Note : 1. “+” indicates pressing one button while holding the other button(s) down.

2. EEPROM and Timer IC resets are for use by authorized servicers only.

Enters hex dump mode.

Enters reset mode for the EEPROM and Timer IC. (Factory and service use only.)

Rev.A 1-9

Product Description EPSON Stylus COLOR 500 Service Manual

1.4.4 Printer Conditions and Status

This section describes how the printer indicates status and error conditions using LEDs.

Table 1-6. Indicator Status

LEDs

Printer Status

Power

Power on condition On — — —

Data exist Blinks — — — Ink sequence Blinks — — — Ink cartridge change mode Blinks — — —

Paper out — — — On

Ink Out (Black)

Ink Out

(Color)

Paper

Out

Paper jam condition — — — Blinks No ink cartridge or Ink end (black) — On — — Ink level low (black) — Blinks — — No ink cartridge or Ink end (color) — — On — Ink level low (color) — — Blinks —

Maintenance request

EEPROM and timer reset — On for 1 second only

Fatal error

Blinks

Rapidly

Blinks

Rapidly

Blinks

Rapidly

On On On

Blinks

Rapidly

Notes: When transparency paper is selected, unidirectional printing is selected.

— Does not affect status listed in the left-hand column.

Blinks

Rapidly

1-10 Rev.B

START

The printer pr ints out: ROM Version No. Protect Counter Value

Cleaning (Black)

Print current settings.

Select the menu

for setting d efau lts?

Select the menu : Cleaning (Black) button Set the menu : Cleaning (Color) button.

Power off the printer

END

Hold down the Load / Eject button with pow er on.

Use the language setting mode.

Select language

for setting defaults?

Cleaning (Color)

Cleaning (Black)

Change the value : C leaning (Blac k) button Set the value : Cl ean ing (Co lor ) bu tton .

Continue setting defaults?

Yes

EPSON Stylus COLOR 500 Service Manual Product Description

1.4.5 Default Settings

This printer has user-selectable default settings, which it refers to at initialization. The default (and factory) settings are listed in the table on the next page.

1.4.5.1 Setting Method

The method of setting defaults is shown in the flowchart below.

Figure 1-3. Default Setting Flowchart

Rev.A 1-11

Product Description EPSON Stylus COLOR 500 Service Manual

1.4.5.2 Setting Menus

The default setting menus are:

Table 1-7. Default Settings

Menus

Print direction

Font

Pitch I/F mode Auto I/F wait mode Software Auto CR

(IBM mode only) AGM

(IBM mode only)

Character tables (standard version)

Settings

(Underlines Indicate Factory Default Settings)

Auto / Bi-D / Uni-D Roman / Sans Serif /

Courier / Prestige / Script / Roman T /

Sans Serif H 10 cpi / 12 cpi / 15 cpi / 17.1 cpi / 20 cpi / Proportional Auto / Parallel / Serial 10 seconds / 30 seconds ESC/P2 / IBM X24E

On /

Off

On /

Italic U.S.A. Italic France Italic Germany Italic U.K. Italic Denmark Italic Sweden Italic Italy Italic Spain 1 PC 437 PC 850 PC 860 PC 863 PC 865 PC 861 BRASCII Abicomp

Italic U.S.A. Italic France Italic Germany Italic U.K. Italic Denmark Italic Sweden Italic Italy Italic Spain 1

Character tables (NLSP version)

PC 437 PC 437 Greek PC 850 PC 853 PC 855 PC 852 PC 857 PC 866 PC 869 MAZOWIA Code MJK ISO 8859-7 ISO Latin 1T Bulgaria

Auto line feed On /

Network I/F mode

Loading position 3 mm /

Thick paper

Economy mode

Note *1. Other settings are set using special commands for the EEPROM.

Off

Off: Used in standalone environment On: Used in network environment

8.5 mm / Others *

Envelopes / Index cards (portrait)

Off

On /

1-12 Rev.B

EPSON Stylus COLOR 500 Service Manual Product Description

1.5 INK CARTRIDGE SPECIFICATIONS

Black

Type Exclusive cartridge Model S020093 Color Black Print capacity 620 pages/ A4 (LQ Roman EQMAtext) Ink Life 2 years from production Storage temperature 20 °C~40°C (–4° F ~ 104° F)

Storage, less than a month at 40 °C (104° F)

–30 °C~40°C (86° F ~ 104°F)

Packing storage, less than a month at 40 °C (104° F)

–30 °C~60°C (86° F ~ 140°F)

Transit, under 120 hours at 60° C(140°F) and less than a month at 40° C (104° F )

Dimensions 19.8 mm (W) × 52.7 mm (D) × 38.5 mm (H)

0.8" (W) x 2.1" (D) x 1.5" (H)

Color

Type Exclusive cartridge Model S020097 Color Magenta, cyan, yellow Print capacity 320 pages /A4 (360 dpi, 5% duty, each color) Ink Life 2 years from production Storage temperatures –20°C~40°C(–4°F ~ 104°F)

Storage, less than a month at 40° C (104° F)

–30° C~40°C(86°F ~ 104° F)

Packing storage, less than a month at 40° C (104° F)

–30° C~60°C(86°F ~ 140° F)

Transit, less than 120 hours at 60 °C (140° F) and less than a month at 40° C (104° F )

Dimensions 42.9 mm (W) × 56.8 mm (D) × 38.5 mm (H)

1.7" (W) x 2.2" (D) x 1.5" (D)

Rev.A 1-13

Product Description EPSON Stylus COLOR 500 Service Manual

1.6 MAIN COMPONENTS

The main components of the EPSON Stylus COLOR 500 are designed for easy removal and repair. The main components are:

❏ Main Board (C161 MAIN) ❏ Power Supply Board (C160 PSB/PSE) ❏ Panel Board (C161 PNL) ❏ Mechanism ❏ Housing

1.6.1 Main Board (C161 MAIN)

This board consists of a CPU (TMP95C061F), a gate array (E05B12), ROM (CG), PROM, DRAM, EEPROM, motor driver ICs, printhead driver circuits, etc.

1.6.2 Power Supply Board (C160 PSB/PSE)

This power supply board is the same as the one used for the Stylus Color IIs. This board consists of a transformer, a switching FET, regulator IC, diode bridge, etc. This board has two ratings for input AC voltages.

1-14 Rev.B

Normal state

Ejecting state

Vibration Plate

Cavity

Nozzle

Piezo

Cavity

EPSON Stylus COLOR 500 Service Manual Operation Principles

2.1 OVERVIEW

This section describes operating principles of the EPSON Stylus COLOR 500 printer mechanism and electrical circuits.

2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM

2.2.1 Principles of the Printing Operation

The printhead operates in one of two modes to eject ink from each nozzle: ❏ Normal state

No electrical charge is applied to the piezoelectric element attached to the back of the cavity, and pressure inside the cavity is kept at a constant level.

❏ Ejecting state

The head data signal is applied to the specific nozzle control line to select the active nozzle for printing, and the piezoelectric element is gradually charged by the drive voltage. Charging the piezoelectric element bends the vibration plate to compress the cavity. Then, ink is ejected from the nozzle.

Figure 2-1. Principles of the Printing Operation

When the ink charge or printhead cleaning operation is performed, ink in the cavity is vacuumed out with a pump mechanism. During printing, on the other hand, ink is simultaneously supplied from the ink cartridge and ejected from the nozzle, depending on changes in the volume of the cavity.

A thermistor is attached to the side of the color printhead driver board to monitor the temperature, because the viscosity of the ink varies, depending on the temperature. The detected temperature level is fed back to the printhead drive voltage control circuit to change the time of the Tc pulse.

Rev.A 2-1

Operating Principles EPSON Stylus COLOR 500 Service Manual

2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS

The EPSON Stylus COLOR 500 contains the following circuit board units:

❏ C161 MAIN / C198 MAIN Board (main control circuit board) ❏ C160 PSB/PSE Board (power supply circuit board). This board is the same as for the Stylus

COLOR.

❏ C161 PNL (control panel board) In addition to the circuit boards above, part of the printhead driver circuit is built on a separate circuit board

installed in the carriage unit; the printhead is attached directly to this board. The figure below shows a block diagram of the electrical circuitry.

2.3.1 Operating Principles of the Main Control Circuit

The main control circuit for this printer is the C161 MAIN Board. This circuit is controlled by a 16-bit TMP96C061AF CPU (IC1), running at a 12.5 MHz internal clock (25 MHz external clock). A 4M DRAM (CAS method) on this board is controlled by the CPU itself. The CPU manages the serial interface control (RS-422 for Mac). C198 MAIN board equips with the hybrid IC for monochrome head common driver circuit. Gate array E05B12 (IC2) manages printhead driver control, the external Centronics panel, and the motor control. The main board also is equipped with a 93C46 EEPROM (IC11) to store certain parameters, such as the printer mechanism control parameter, default setting parameters, as well as the special counter value used for printhead (ink management) protection. The NJU6355E timer IC (IC10) counts each time the printer is cleaned and keeps track of how long since the printer has been used, allowing the printer to be cleaned only when necessary.

parallel I/F, the control

PROM(4M) (IC3)

RS-422 Seria l I/ F

From A

From B

PROM (IC4)

CPU

TMP95C061AF (IC1)

Battery

C161/ C198 MAIN Board

Black/Color Head Common D ri v er C ir c ui t

UDN2917EB (IC14, 15) Carriage/Paper Feed Motor Driver

DRAM (IC5)

DMAREQ

CLK

SD I/O

(IC10)

NJU6355E (Timer Counter)

CG-ROM (IC6)

E05B12 (IC2)

To B

Parallel I/ F

(Centronics)

Carriage/Paper Feed

Carriage

SED6100D0A/ SED6110D0A (U1)

SED5619D0A (U1)

Data Bus

Address Bus

To A

Drive Signal

Black/Color Head

Common and Nozzle

CG-ROM (IC7)

(IC8)

PST592D

Panel

EEPROM

(IC11) 93C46

(IC9)

M51955B

Selector Drive Signal

Reset (Logic)

Reset (Power)

Black 64 Nozzles

Color 60 Nozzles

Figure 2-2. Main Control Circuit Block Diagram

2-2 Rev.B

COM

GND

Head Drive Voltage

BHLAT

BHSO

BHCLK

#64

EPSON Stylus COLOR 500 Service Manual Operation Principles

2.3.1.1 Printhead Driver Circuit

The printhead driver circuit for this printer is composed of the following two parts:

❑ Common driver circuit (trapezoidal drive pulse generation) ❑ Head driver circuit (nozzle control built on the printhead)

The SED6100D0A/SED6110D0A monochrome printhead driver circuit for the 64-dot head on the carriage acts as a nozzle selector to drive the black printhead nozzles selectively. The SED5619D0A 60-dot (Y, M, C

× 20 ) thermal head driver in the color printhead’s driver circuit on the carriage also acts as a nozzle selector to drive the color head nozzles selectively. Print data is converted to serial data by gate array E05B12 (IC2) and is output from port BHSO to the black head driver circuit or output from port CHSO to the color head driver circuit. Then, head driver SED6100D0A/ SED6110D0A or SED5619D0A latches the head data when gate array E05B12 outputs the BHLAT or CHLAT signal, and the latched data becomes 64-bit parallel data for the black head, or 60-bit parallel data for the color head. One bit corresponds to each nozzle.

When data transfer and nozzle selection are complete, gate array E05B12 outputs the common driver pulse Pc (charge pulse) and Pd (discharge pulse) to the common driver circuit. The common driver circuit then generates the trapezoidal pulse and applies it to the printhead as a common driver pulse. After this, the nozzle selected by the head data is activated to eject ink.

E05B12 (IC2)

Pc Pd

BHLAT BHCLK BHSO

Pc Pd

CHLAT CHCLK CHSO

Figure 2-2. Print Data Transmission Timing

SED6100D0A SED6110D0A (U1 )

Common Driver

Common Driv er

C161 MAIN

CN8

CN1

CN9

CN1

COM1-36

LAT

DOUT63 - 1

CLK

DOUT64 - 2

SED5619D0A (U1)

COM1-3

LAT

DO64-61

CLK

DO60 - 1

On Carriage (Head Driver Board)

Row A

Row B

Not Con nected Magenta

Cyan

Yellow

Figure 2-3. Printhead Driver Circuit Block Diagram

Rev.A 2-3

Operating Principles EPSON Stylus COLOR 500 Service Manual

2.4 INK SYSTEM MANAGEMENT

The ink system is controlled to protect the printhead and ink supply system and ensure high-quality output.

2.4.1 Counter

EEPROM 93C46 (IC11) on the main board stores certain counter and timer values used for controlling ink system operation. The counters are stored in the EEPROM on the main board, and while the printer is on, this data is stored into the RAM on the main board.

❏ Ink Consumption Counter This counter value is stored in the EEPROM on the main board,

and while the printer is on, the data is stored in RAM on the main board. This counter is always reset when the ink cartridge is removed.

2-4 Rev.B

+ 45 hidden pages