– 94 –
TROUBLESHOOTING
2-12-1. Power is not Supplied
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) LVPS assy, (2) MCU PCB, (3) Feeder assy
(4) Optional feeder unit, (5) HVPS, (6) Fan, (7) Drive assy
(8) Pick up solenoid, (9) Console assy, (10) ROS assy
2
(Check LVPS assy)
Are the voltages as follows?
24VDC between J11-10PIN
↔
J11-2PIN, J11-11PIN
↔
J11-2PIN, J11-12PIN
↔
J11-2PIN
5 VDC between J11-5PIN
↔
J11-2PIN, J11-6PIN
↔
J11-2PIN
•
Disconnect one of the connectors (P/J11) from the MCU
PCB, and after about 5 minutes, turn on the power and check
the voltages.
Check before the output is stopped by the no-load status of the
LVPS assy (within 30 seconds of the power being turned on).
3
Does the fan rotate when the power is turned on?
4
(Check main logic board) *1
Disconnect connector (P/J5) and wait 2-3 minutes. Then turn
on the power and check to see if a display appears on the LCD
and if the fan rotates.
5
(Check HVPS) *2
Disconnect connector (P/J111) from the HVPS. Then turn on
the power and see if a display appears on the LCD and if the fan
rotates.
6
(Check fan) *2
Disconnect connector (P/J18) from the MCU PCB. Then turn
on the power and see if a display appears on the LCD and if the
fuser begins to warm up.
7
(Check drive assy) *2
Disconnect connector (P/J14) from the MCU PCB. Then turn
on the power and see if a display appears on the LCD and if the
fan rotates.
8
(Check pick up solenoid) *2
Disconnect connector (P/J17) from the MCU PCB. Then turn
on the power and see if a display appears on the LCD and if the
fan rotates.
To step 2
To step 3
Replace MCU
PCB.
Check main logic
board.
Replace HVPS.
Replace fan.
Replace drive
assy.
Replace pick up
solenoid.
Replace or
reinstall.
Replace LVPS
assy.
To step 4
To step 5
To step 6
(check all of the
following steps
with the connec-
tor disconnected
from the HVPS)
To step 7
To step 8
To step 9
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 ...