– 101 –
TROUBLESHOOTING
3-5. Faulty Heater Rod
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) Heater rod
(4) MCU PCB, (5) LVPS assy, (6) ROS assy
(7) CRU sensor PCB
2
(Check heater rod)
100-115V models: Is there conductivity between J101-2PIN
↔
J101-6PIN?
220-240V models: Is there conductivity between J101-3PIN
↔
J101-6PIN?
3
(Check LVPS)
Is there 4.2 VDC between J11-1PIN
↔
J11-2PIN?
•
Check before the output is stopped by the no-load status of the
LVPS assy (within 30 seconds of the power being turned on).
4
(Check heater rod ON signal) *1
Is the voltage between P/J11-1PIN
↔
P/J11-2PIN 0 VDC
when the interlock switch is on, and 3.7 VDC when the
interlock switch is off?
•
Check while the fuser assy is still cold.
5
(Check power supply of heater rod ON signal) *1 *2
Is 5 VDC being supplied between P/J11-5PIN
↔
P/J11-2PIN?
6
(Check power supply of heater rod ON signal) *2
Disconnect the connector (P/J12) from the MCU PCB, and see
if the heater rod lights up when the power supply is turned on.
7
(Check power supply of heater rod ON signal) *2
Disconnect the connector (P/J15) from the MCU PCB, and see
if the heater rod lights up when the power supply is turned on.
8
(Check heater rod)
Disconnect the heater rod, and see if there conductivity be-
tween the terminals on the two ends of the rod.
9
(Check temp. sensor assy)
100-115V models: Is there conductivity between the terminals
of the J101-2PIN harness, and between the
terminals of the J101-6PIN harness?
220-240V models: Is there conductivity between the terminals
of the J101-3PIN harness, and between the
terminals of the J101-6PIN harness?
10
(Check thermostat and fuse)
Check to see if the thermostat is open, and if the fuse has melted.
*1: Check with the connector (P/J111) disconnected from the HVPS.
*2: The “5VDC-LD” which is the LD power supply for the LD assy of the ROS assy also doubles as the heater rod ON signal.
To step 2
To step 3
To step 4
To step 5
Replace LVPS
assy.
Replace ROS
assy.
Replace CRU
sensor PCB.
To step 9
To step 10
In order to find out
why the thermostat
is open or the fuse
has melted, first
replace the fuser
assy, and then go
back to Step 1 and
check again.
Replace or
reinstall.
To step 8
Replace LVPS
assy.
To section 3-6
To step 6
To step 7
Replace MCU
PCB.
Replace heater
rod.
Replace temp.
sensor assy.
Replace fuser
assy.
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 ...