Canon PC400 Service Manual - Page 155

III. IMAGE TROUBLESHOOTING, A. Making Initial Checks

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CHAPTER 10 TROUBLESHOOTING III. IMAGE TROUBLESHOOTING A. Making Initial Checks 1. Site Environment a. The voltage of the power source must be within the specifications. b. Avoid areas subjected to dust or high temperature/humidity (near water faucets, water boilers, humidifiers) and areas near open fires. c. Avoid areas subjected to ammonium gas. d. Avoid direct rays of the sun; otherwise, provide curtains. e. Make sure the site is well ventilated. f. Make sure the floor is level. Check the site to see if it meets the above requirements. 2. Checking the Documents You must first check to see if a particular problem may not be due to the document used. a. The copy density reading should be 5.5 ±1.5 (black)/4.5 ±1.5 (color). b. Some backgrounds, i.e., yellow shades, tend to produce copies with poor contrast. c. Diazo copies or translucent documents tend to produce copies that may be mistaken for foggy copies. d. Documents prepared in light pencil tend to produce copies that may be mistaken for light copies. COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-11

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COPYRIGHT © 1998 CANON INC.
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10-11
III. IMAGE TROUBLESHOOTING
A. Making Initial Checks
1.
Site Environment
a.
The voltage of the power source must be within the specifications.
b.
Avoid areas subjected to dust or high temperature/humidity (near water faucets,
water boilers, humidifiers) and areas near open fires.
c.
Avoid areas subjected to ammonium gas.
d.
Avoid direct rays of the sun; otherwise, provide curtains.
e.
Make sure the site is well ventilated.
f.
Make sure the floor is level.
Check the site to see if it meets the above requirements.
2.
Checking the Documents
You must first check to see if a particular problem may not be due to the document
used.
a.
The copy density reading should be 5.5 ±1.5 (black)/4.5 ±1.5 (color).
b.
Some backgrounds, i.e., yellow shades, tend to produce copies with poor
contrast.
c.
Diazo copies or translucent documents tend to produce copies that may be
mistaken for foggy copies.
d.
Documents prepared in light pencil tend to produce copies that may be mistaken
for light copies.