Text preview for : sc400_5.pdf part of epson 400 there\'s a most useful part (5) of epson 400 printer service manual
Back to : sc400_5.pdf | Home
Chapter 5 Troubleshooting
5.1 Troubleshooting....................................................................................................5-1 5.2 Unit Level Troubleshooting .................................................................................5-3
5.2.1 Printer does not operate at power on................................................................................... 5-4 5.2.2 Error is detected ..................................................................................................................... 5-5 5.2.3 Failure occurs during printing .............................................................................................. 5-6 5.2.4 Printer does not feed the paper correctly ............................................................................ 5-7 5.2.5 Control panel operation is abnormal.................................................................................... 5-8
5.3 Unit Repair C206 PSB/PSE Board .......................................................................5-9
5.3.1 Unit Repair - C206 Main Board ............................................................................................ 5-11
5.4 Repair of the Printer Mechanism.......................................................................5-13
EPSON Stylus Color 400 Service Manual
5.1 Troubleshooting
The printer may exhibit different symptoms for the same problem, which makes troubleshooting more difficult. This section, however, provides simple and effective ways to facilitate troubleshooting. The following flowchart illustrates the main steps of the trouble shooting process.
START
Unit Level Troubleshooting
Unit Repair (C206 PSB/PSE)
Unit Repair (C206 Main)
Unit Repair Printer Mechanism
Disassemble and Adjustment
END
Figure 5-1. Troubleshooting Process Flowchart
Table 5-1. Motor Resistance and Measurement Procedure Motor Name CR Motor PF(Pump) Motor Location CN6(C206 MAIN) CN7(C206 MAIN) Check Point 1-pin & 3-pin, 2-pin & 4-pin 1-pin & 3-pin, 2-pin & 4-pin Resistance 7.8 Ohms ±10% 7.8 Ohms·}10%
Table 5-2. Sensor Check Sensor Name Paper end sensor Carriage home position sensor ASF phase Sensor Black cartridge sensor Color cartridge sensor Thermistor Check Point CN4 / 1-pin, 2-pin CN5 / 1-pin, 2-pin Signal Level Open: less than 0.7 V Close: more than 2.4 V Open: less than 0.7 V Close: more than 2.4V Open: less than 0.7 V Close: more than 2.4 V On: 0 V Off: more than 2.4 V On: 0 V Off: more than 2.4 V Analog data Sensor Status Paper exit No paper Home position Out of home position Home position Out of home position Black cartridge out Black cartridge exit Color cartridge out Color cartridge exit Change the VH voltage of charge pulse for common driver circuit
CN11 / 1-pin, 2pin CN8 / 1-pin, 18pin
CN8 / 2-pin, 18-pin CN8 / 3-pin, 18-pin
Rev. A
5-1
Chapter 5 Troubleshooting
Table 5-3. Printer Condition and Panel Status Indicators Error status Power Paper Out Paper jam condition No Ink cartridge or Ink end(black) No Ink cartridge or Ink end(color) Maintenance request Fatal error ------Ink Out (Black) --Off On Ink Out (Color) --Off --Paper Out On Blink --Load paper by pressing load/eject button. Eliminate a paper then press load/eject button. Install a new black ink cartridge by pressing load/eject button for 3-seconds. Install a new color ink cartridge by pressing load/eject button for 3-seconds. Change the waste ink drain tank and reset the EEPROM. Turn on the printer and turn it on again. If printer can not recover, repair the suitable part. Recovery
---
---
On
---
Blink Blink
Blink On
Blink On
Blink Blink
5-2
Rev.A
EPSON Stylus Color 400 Service Manual
5.2 Unit Level Troubleshooting
When a problem occurs, you can identify the defective unit according to the symptoms exhibited. The table below lists the symptoms of certain problems. Once the problem is identified, refer to the flowchart that corresponds to the problem. Table 5-4. Symptom and Problem Symptom Printer does not operate at power on Error is detected Failure occurs during printing Problem ·ˇLEDs do not light up. ·ˇPrinter mechanism does not operate. ·ˇError is indicated by LED indication. ·ˇPrinting is not performed. ·ˇAbnormal printing(missing dot, etc.) ·ˇPrint quality is poor ·ˇNo paper is fed. ·ˇPaper feed is irregular. ·ˇPaper jam occurs. ·ˇNo response to button access. Flowchart No. Section 5.2.1 Section 5.2.2 Section 5.2.3
Printer does not feed the paper correctly Control panel operation is abnormal
Section 5.2.4
Section 5.2.5
Rev. A
5-3
Chapter 5 Troubleshooting
5.2.1 Printer does not operate at power on
START
Is AC power voltage normal?
YES Is the fuse(F1) of power supply board opened? NO
NO
Input normal power supply.
YES
Exchange the fuse. Disconnect CN10 in the main board and turn the power on again. NO
Check output voltage of CN2 in the power supply board.
Is the fuse opend again? YES
Is the output voltage NO of power supply normal? YES Exchange the main board. Check the motor and head. Refer to the repair item of the printer mechanism. Exchange the power supply board
END
Figure 5-2. Flow Chart 1
5-4
Rev.A
EPSON Stylus Color 400 Service Manual
5.2.2 Error is detected
START
Check the error message.(Refer to Table5-3)
Is it carriage error? NO No ink cartridge error? NO Maintenance Error
Yes
Turn off the printer, and move the carriage by hand.
Yes
Exchange the inkcartridge with new one.
Does the carriage move smoothly? NO Yes Check CR motor. Exchange the main board if there is no problem.
Yes
Does error appear again? NO Yes
Exchange the waste ink absorber and reset the counter. (Refer to 1.4.2)
Is the problem solved? NO Refer to 5.4 Repair of the printer mechanism.
Check ink cartridge sensor and exchange the head if it's ubnormal.
END
END
Figure 5-3. Flow Chart 2
Rev. A
5-5
Chapter 5 Troubleshooting
5.2.3 Failure occurs during printing
START
Perform selftest printing
Is printing carried out O.K? YES Is printing quality normal? NO
NO Is all cables connected to the main YES board? NO Connect cables
Perform printing adjustment. YES (Refer to Chapter4)
Perform cleaning Is the problem solved? YES Is the problem solved? YES
Is the problem solved? YES
NO
Exchange the ink cartridge with new one and perform self-test.
NO
Refer to 5.4 Repair of the printer-mechanism.
YES
Is the problem solved? NO
NO
Refer to 5.4 Repair of the printer-mechanism.
Replace the Main board
YES
Is the problem solved?
NO
END
END
END
Figure 5-4.Flow Chart3
5-6
Rev.A
EPSON Stylus Color 400 Service Manual
5.2.4 Printer does not feed the paper correctly
START
Are papers set in the ASF correctly?
NO Set the paper correctly
Does the PF roller and platen rotate? YES
NO
Is the PF motor running? YES
Remove any obstruction in the paper path if there is any.
NO Check the PF motor. If there is no problem, replace the main board.
Perform cleaning for the roller of paper path.
problem solved?
Is the
NO
YES
Refer to 5.4.Repair of the printer mechanism.
END
END
Figure 5-5. Flow Chart 4
Rev. A
5-7
Chapter 5 Troubleshooting
5.2.5 Control panel operation is abnormal
START
Is the control panel connected correctly? NO YES Connect the control panel correctly.
Is the problem solved? NO
YES
Replace the control panel.
Is the problem solved? YES
NO Replace the main board.
END
END
Figure 5-6. Flow Chart 5
5-8
Rev.A
EPSON Stylus Color 400 Service Manual
5.3 Unit Repair C206 PSB/PSE Board
This section describes the problems related to the power supply board(C206 PSB/PSE). The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component.
Table 5-5. C206PSB Power Supply Borad Symptom Condition Cause F1 is open. Checkpoint Check F1 by using a tester. Solution Replace F1.
The printer does not operate at all.
+42V line is dead.
Transformer coils are open. Switching FET (Q1) is dead.
Check the waveform at Replace T1. the drain of Q1. Check drain side. Replace Q1.
Feed back transistor(Q2, Q3) are dead.
Check corrector side.
Replace Q2 or Q3.
+42 V line is abnormal.
Check following parts. · ZD87,ZD83 · ZD51,ZD81·`ZD86 · PC1
Replace suitable parts.
Rev. A
5-9
Chapter 5 Troubleshooting
Table 5-6. C206PSB Power Supply Board (Continued) Symptom Condition +5V line is dead. Cause IC51 (L4962E) is dead. Checkpoint Check the oscillation(5 -pin) and switching (7pin) waveform of IC51. (5-pin) Solution Replace IC51.
(7-pin)
5-10
Rev.A
EPSON Stylus Color 400 Service Manual
5.3.1 Unit Repair - C206 MAIN Board
This section describes the problems related to the main controller board(C206 main). The table below provides various symptoms, likely causes, and checkpoints. The check points refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component. Table 5-7. Repair of the C206 MAIN Board Condition Cause Checkpoint CPU does The reset Check the waveform of not operate. circuit does not the +5V and /Reset signal operate. (IC8=5,1-pin/IC9=7,6-pin)
Symptom The printer does not operate at all.
Solution Replace IC8 or IC9.
Control ROM is not selected correctly or it's dead. RAM is not selected correctly or it's dead.
CRU2 is dead.
If you can not find the waveform at 2-pin of IC3, the IC1 is dead, and if you can not find it at 20-pin of IC3, the IC3 is dead. If you can not find the waveform at 29,14-pin of IC4, the IC1 is dead, and if you can not find it at 28pin of IC4, the IC4 is dead. Check the waveform at 27,28-pin of IC1.
Replace IC1 or IC3.
Replace IC1 or IC 4.
Replace the CRU2.
The carriage does not operate normally.
Carriage motor does not operate at all.
IC2 is dead.
Check the waveform at 72,73 and 75, 76 pin of IC14.
Replace IC2.
IC14 is dead.
Check the waveform at 6-9 pin if IC14.
Replace IC14.
Rev. A
5-11
Chapter 5 Troubleshooting
Table 5-8.Repair of the C206 MAIN Board (Continued) Symptom Printing is abnormal. Condition Printing is not execute. Cause IC7 is dead. Checkpoint Check the trapezoidal waveform at 3-pin of Q7 on C206 main board. Solution Replace IC6, Q7, or Q9.
IC2 is dead.
Check the control signal Replace IC2. of trapezoidal from IC2. (at 80 pin of IC2)
Paper feed operation is abnormal.
Paper feed motor does not work.
IC2 is dead.
Check the output waveform of at 55, 56, 57, 58 pin of IC2.
Replace IC2
IC15 is dead.
Check the output waveform of at 6, 7, 8, 9 pin of IC15.
Replace IC15
5-12
Rev.A
EPSON Stylus Color 400 Service Manual
5.4 Repair of the Printer Mechanism
This section provides instruction for repairing the printer mechanism. It describes various problems, symptom, likely causes, checkpoints, and solutions. Select appropriate symptom from the table and check each parts and its function as described in the checkpoint. Table 5-9. Repair of the Printer Mechanism Symptom Abnormal pump mechanism operation Condition Abnormal PF motor operation when the power is turned on. Cause Checkpoint Foreign substances Manually drive the are loaded in the PF platen drive gear gears. and check it if it rotates normally. Solution Remove any foreign substances.
Ink is not absorbed or is poorly absorbed.
The PF motor is Check the inner coil defective. resistance and see (Refer to Table5-1) if there is any disconnection of the coil. Used ink does not The pump tube is Check the tube go through the crashed. visually. waste ink tube. Check the capping rubber visually. Check if the tube is out of the cap visually. Check the bulb operation visually.
Exchange the PF motor.
Fix the crashed part by the airgun.
Capping rubber is damaged or deformed. The tube is out of the cap. Pump bulb is not closed at absorption. Abnormal carriage Abnormal carriage Foreign substance operation. operation at power in the CR drive on. gear. CR motor is defective.
Replace the cap mechanism. Connect the tube properly. Replace the cap mechanism. Remove any foreign substances. Replace the CR motor.
Check visually if there is any substances or not. Check the inner coil resistance and see if there is any disconnection of the coil. Abnormal carriage Carriage movement Check whether the operation during is not smooth. carriage moves printing. smoothly when moved manually. Check tension of the timing belt.
Clean and lubricate the carriage guide axis. Adjust tension mechanism or exchange it. Remove any foreign substances.
Printing is not performed.
The carriage moves, but no printing is performed.
Check if there is any foreign substances in the carriage path. Head FFC is out of Check if the head Connect the FFC connection. FFC on the board or properly. carriage is connected surely. The FFC is Check the FFC by using Replace the FFC. disconnected a tester. inside. I/C is defective. Install a new I/C and Replace I/C. perform the self-test. Head unit is If the condition does Replace the head defective. not improve even unit. after 2or 3 times cleaning operation, replace the head unit and perform the self-test.
Rev. A
5-13
Chapter 5 Troubleshooting
Table 5-10. Repair of the Printer Mechanism (Continued.) Cause Check-point Solution Print head surface is Perform the cleaning Perform the Abnormal printing Only a particular dot not clean. operation several cleaning. causes abnormal (dot missing) times and check printing. printing. The head unit is Perform the cleaning If condition does not defective. operation several improve even after times and check the cleaning, replace printing. the head. Capping absorber is Check the head Replace the head touching the head absorber visually. absorber if it is surface. deformed. A dot is not printed Print head surface Perform the cleaning Perform the occasionally. is not clean. operation several cleaning. (dot-missing) times and check printing. The head FFC is Check the FFC by Replace the head disconnected inside. using a tester. FFC. The head FFC is out Check if the head Connect the FFC of connection. FFC on the board or properly. carriage is connected surely. The head unit is Perform the cleaning If condition does not detective. operation several improve even after times and check the cleaning, replace printing. the head. I/C is defective. Install the new I/C Replace I/C. and perform selftest. Black specks or The head FFC is out Check if the head Connect the FFC dots. of connection. FFC on the board or properly. carriage is connected surely. The head unit is Check connection Replace the head if detective. with the head FFC. there is no connection problem with the FFC. A vertical line is not Bi-directional Perform Bi-D Refer to Chapter4. aligned. alignment is not adjustment. adjusted. White line appears Head angle is not Perform head angle Refer to Chapter4. in the image data. correct. adjustment. Platen gap is not Perform platen gap Refer to Chapter4. correct. adjustment. Dot shooting Perform the cleaning Perform the direction is tilted operation several cleaning operation. because head times and check surface is not clean printing. I/C is defective. Install a new I/C and Replace I/C. perform the self-test. Head unit is Perform the cleaning Replace the head defective. operation several unit. times and check printing. Symptom Condition
5-14
Rev.A
EPSON Stylus Color 400 Service Manual
Table 5-11. Repair of the Printer Mechanism (Continued) Symptom Abnormal paper feeding. Solution Clean the PF roller by the cleaning sheet. Replace the PF roller if it does not recover. Abnormal operation Check movement of Replace ASF. of the hopper. the ASF hopper visually. Malfunction of ASF Check if the ASF Replace gears of drive change-over. gear rotates visually. the ASF drive changeover. Friction of the PF Check if the PF Clean the PF roller roller. roller slips during by the cleaning paper feeding. sheet. Replace the PF roller if it does not recover. Printer stops during Fatal error appears. ASF sensor is Check the signal Replace ASF initialization. defective. level of the ASF sensor. sensor.(Refer to Table 5-2) PE sensor is Check the signal Replace PE sensor. defective. level of the PE sensor.(Refer to Table 5-2) HP sensor is Check the signal defective. level of the HP sensor .(Refer to Table 5-2.) Head FFC is Check if the head Connect the head disconnected. FFC is connected. FFC. CR motor is defective. Check the CR motor Replace the CR cable is connected. motor if there is no problem in the cable connection. Check if the PF Replace the PF motor cable is motor if there is no connected. problem in the cable connection. Condition Paper is not fed. Causes Friction of the PF roller. Checkpoint Check if the PF roller rotates when paper is not fed.
PF motor is defective.
Rev. A
5-15