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TROUBLESHOOTING
4.
Image Defects
Note: The following items assume that the main logic board is normal. However, the Test Print mode can be used to
determine if the problem is with the main logic board or the engine side.
•
If printing is normal in Test Print mode
→
The problem is on the main logic board side.
•
If printing is abnormal in Test Print mode
→
The problem is on the engine side.
If a problem occurs with the image quality of the printing, make sure the cause of the problem can be accurately pinpointed
and the appropriate action taken, by using the “Letter” or “A4” size for printing. Then refer to the tables showing the
various image quality problems. This allows more efficient troubleshooting procedures.
If the problem cannot be solved using the image quality problem tables, check the tables once again, and try replacing
the “Main Parts to be checked” listed under “Initial Check” one by one. Also, use the “Maintenance Guide” in Chapter
4 to carry out troubleshooting procedures.
The Image Problem Tables are divided into the following 15 representative types of problems:
P-1. Light
P-2. Blank
P-3. All black
P-4. Vertical
P-5. Vertical
white bands
white lines
P-6. Horizontal
P-7. Vertical
P-8. Horizontal
P-9. Blank spots
P-10. Black dots
white bands
black lines
black lines
P-11. After-image
P-12. Smudging
P-13. Skew
P-14. Wrinkles
P-15. Poor fixing
Содержание LS-5 SERIES
Страница 1: ...LASER PRINTER LS 5 SERIES TECHNICAL MANUAL SECOND EDITION ...
Страница 4: ... 2 GENERAL SPECIFICATIONS ...
Страница 6: ... 2 GENERAL SPECIFICATIONS ...
Страница 14: ... 10 THEORY OF OPERATION ...
Страница 20: ... 16 THEORY OF OPERATION Figure 2 5 Cassette Feed ...
Страница 22: ... 18 THEORY OF OPERATION Figure 2 6 Paper Transportation ...
Страница 25: ... 21 THEORY OF OPERATION Figure 2 8 Drive Figure 2 9 ROS Assy Figure 2 10 EPX Toner Cartridge ...
Страница 28: ...REPLACEMENT AND ADJUSTMENTS OF PARTS 24 ...
Страница 56: ... 52 MAINTENANCE GUIDE ...
Страница 84: ... 80 TROUBLESHOOTING ...
Страница 136: ... 2 GENERAL SPECIFICATIONS ...
Страница 140: ... 136 2 Cassette Feed 2 1 Disassembly Drawing ...
Страница 142: ... 138 3 Paper Transportation 3 1 Disassembly Drawing ...
Страница 144: ... 140 4 Fusing Paper Exit 4 1 Disassembly Drawing ...
Страница 146: ... 142 5 Drive Photographics 5 1 Disassembly Drawing ...
Страница 148: ... 144 6 Electrical 6 1 Disassembly Drawing ...
Страница 151: ... 147 7 Optional Feeder Unit 250 7 1 Disassembly Drawing ...
Страница 153: ... 149 8 Optional Feeder Unit 500 8 1 Disassembly Drawing ...
Страница 158: ... 154 10 Main Logic Board LS 5EX TT 10 1 Circuit Diagram Title BLOCK DIAGRAM ...
Страница 159: ... 155 Main Logic Board LS 5EX TT 1 10 Title CPU BLOCK 1 ...
Страница 160: ... 156 Main Logic Board LS 5EX TT 2 10 Title G A BLOCK 2 ...
Страница 161: ... 157 Main Logic Board LS 5EX TT 3 10 Title RAM BLOCK 3 ...
Страница 162: ... 158 Main Logic Board LS 5EX TT 4 10 4Title ROM BLOCK ...
Страница 163: ... 159 Main Logic Board LS 5EX TT 5 10 Title ENGINE I F BLOCK 5 ...
Страница 164: ... 160 Main Logic Board LS 5EX TT 6 10 6Title FONT CART CN BLOCK ...
Страница 165: ... 161 Main Logic Board LS 5EX TT 7 10 Title CENT I F BLOCK 7 ...
Страница 166: ... 162 Main Logic Board LS 5EX TT 8 10 Title SERIAL I F BLOCK 8 ...
Страница 167: ... 163 Main Logic Board LS 5EX TT 9 10 9Title EXROM BLOCK ...
Страница 168: ... 164 Main Logic Board LS 5EX TT 10 10 10 Title POWER BLOCK ...
Страница 169: ... 165 10 2 Component Layout Parts Side ...
Страница 170: ... 166 10 2 Component Layout Solder Side ...
Страница 174: ... 170 11 Main Logic Board LS 5 11 1 Circuit Diagram Title BLOCK DIAGRAM ...
Страница 175: ... 171 Main Logic Board LS 5 1 7 Title CPU BLOCK 1 ...
Страница 176: ... 172 Main Logic Board LS 5 2 7 Title G A BLOCK 2 ...
Страница 177: ... 173 Main Logic Board LS 5 3 7 Title RAM BLOCK 3 ...
Страница 178: ... 174 Main Logic Board LS 5 4 7 4Title ROM BLOCK ...
Страница 179: ... 175 Main Logic Board LS 5 5 7 Title CARTRIDGE BLOCK 5 ...
Страница 180: ... 176 Main Logic Board LS 5 6 7 6Title PARALLEL SERIAL IF BLOCK ...
Страница 181: ... 177 Main Logic Board LS 5 7 7 Title PANEL EET ENGINE IF BLOCK 7 ...
Страница 182: ... 178 11 2 Component Layout Parts Side ...
Страница 183: ... 179 11 2 Component Layout Solder Side ...
Страница 186: ... 182 12 ROM Board MS 12 1 Circuit Diagram Title BLOCK DIAGRAM ...
Страница 187: ... 183 ROM Board MS 1 2 Title CONNECTOR DECODE BLOCK 1 ...
Страница 188: ... 184 ROM Board MS 2 2 Title ROM BLOCK 2 ...
Страница 189: ... 185 12 2 Component Layout Parts side Solder side ...
Страница 191: ... 187 13 RAM Board 13 1 Circuit Diagram Title RAM BOARD ...
Страница 192: ... 188 13 2 Component Layout Parts side ...
Страница 194: ... 190 14 RAM Module 1MB 14 1 Circuit Diagram ...
Страница 196: ... 192 15 RAM Module 2MB 15 1 Circuit Diagram ...
Страница 198: ... 194 16 Font Cartridge 16 1 Circuit Diagram ...
Страница 199: ... 195 16 2 Component Layout Parts side ...
Страница 203: ... 2 GENERAL SPECIFICATIONS ...