Epson STYLUS 4001968 Service Manual page 3

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)
damage to equipment.
Signals a precaution which, if ignored, could result in serious or fatal personal injury.
DANGER
Great caution should be exercised in performing procedures preceded by DANGER
Headings.
Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performin grepair/
maintenance procedures.
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND
PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCE-
DURE.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR
WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECH-
NICIANS IN THEIR LINE OF WORK.
WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT
3.
CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO.
WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAU-
TION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPO-
NENTS.
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON
CERTIFIED REPALR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED
VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON
PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER
SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED
3.
FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIR-
CUIT BOARDS AND/OR INDIVIDUAL CHIPS.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE
STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS,
WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPO-
NENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICS OR
PRECAUTIONS
DANGER
WARNING