– 102 –
TROUBLESHOOTING
3-6. Faulty Temp. Sensor Assy
Step
Check
Measure
YES
NO
1
Check parts with different specifications for problems with
usage, defective installation, breakage, and deformation.
•
Main parts to be checked:
(1) Fuser assy, (2) Temp. sensor assy, (3) MCU PCB
(4) LVPS assy
2
(Check temp. sensor assy)
Is there any unusual grime or foreign matter clinging to the
thermistor of the temp. sensor assy?
3
(Check thermistor of temp. sensor assy)
Is there 200~350 K
Ω
between J101-1PIN
↔
J101-4PIN when
the fuser assy discharges at room temperature (18~22
°
C)?
•
Check while the fuser assy is still cold.
4
(Check LVPS assy)
Is there 200~350 K
Ω
between J11-13PIN
↔
J11-14PIN when
the fuser assy discharges at room temperature (18~22
°
C)?
•
Check while the fuser assy is still cold.
3-7. Faulty Exit Sensor
Step
Check
Measure
YES
NO
1
Check parts with different specifications for problems with
usage, defective installation, breakage, and deformation.
•
Main parts to be checked:
(1) Exit sensor, (2) MCU PCB, (3) Harness assy sensor
(4) LVPS assy
2
(Check power supply of exit sensor) *1
Is 5 VDC being supplied between P16-1PIN
↔
P16-2PIN?
3
(Check exit sensor ON signal)*1
Is 5 VDC being supplied between P16-3PIN
↔
P16-2PIN?
4
(Check exit sensor ON signal) *1
Is 0 VDC being supplied between P/J16-3PIN
↔
P/J16-2PIN
when the detecting section of the exit sensor is in “Pass” status
(paper exists), and is 5 VDC being supplied when the exit
sensor is blocked (no paper exists)?
•
Because the elec. box cover has been removed, the status of
the detecting section of the exit sensor can be used for
checking.
5
(Check harness assy sensor)
Is there conductivity between J16
↔
J119?
*1: Check with the connector (P/J111) disconnected from the HVPS.
To step 2
To step 3
To step 4
Replace MCU
PCB.
Replace exit
sensor.
Replace or
reinstall.
To section 3-1
Replace MCU
PCB.
To step 5
Replace harness
assy sensor.
Replace or
reinstall.
Replace temp.
sensor assy or
cleaning.
Replace temp.
sensor assy.
Replace LVPS
assy.
To step 2
To step 3
To step 4
Replace MCU
PCB.
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 ...