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Jeio tech OV-11 Service Manual

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작성일자
2008-3-31
개정일자
2008-3-31
개정번호
Rev.(0)
Service Manual
(Model : OV-11 / 12)

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Summary of Contents for Jeio tech OV-11

  • Page 1 작성일자 2008-3-31 개정일자 2008-3-31 Service Manual 개정번호 Rev.(0) (Model : OV-11 / 12)
  • Page 2 INDEX 2. Disassembly and Inspection 1. Service 1-1. Temperature 2-1. Disassembly - Temp doesn’t increase 2-1-1. Side Cover panel disassembly. - Temp trembling 2-1-2. Door packing disassembly. - Variation Cause 2-1-3. Main board PCB disassembly. - Temp keeps rising 2-1-4. SSR disassembly. 2-1-5.
  • Page 3 1. Service 1-1. Temperature Classification Symptom Service Factor Temperature Temp doesn’t increase Heater Malfunction 1. After setting 100℃ then press Start Button to operate the unit. 2. Check the Heater temp itself. (Be careful heater is very hot.) 3. Measure resistance checking positive terminal of heater using of the multi meter. Check point If resistance doesn’t measure, it is a malfunction - Replace a heater.
  • Page 4 1. “2-1-1. Side Cover panel disassembly” Reference 2. “2-1-5. Relay disassembly” Reference 3. The assembly is reverse order of disjointing. Classification Symptom Service Factor Temperature Temp doesn’t increase SSR Malfunction 1. Set the SV value higher than PV, Press the Start Button. 2.
  • Page 5 Classification Symptom Service Factor Temperature Temp doesn’t increase PCB Malfunction 1. Set the SV value higher than PV, Press the Start Button. 2. Check the HEAT LED is lightning on Display. (No Flickering, Lightning) 3. Check Terminal Resistance using of the Multi meter. (DC MODE) If resistance doesn’t measure, it is a malfunction.
  • Page 6 Classification Symptom Service Factor Temperature Temp doesn’t increase Wire from heating parts disconnection 1. Check the wire from Heater to SSR. 2. “2-2-9. Wiring disconnection ” Reference Check point If resistance is not measured, it is disconnection. 3. Check the end terminal connection of the wire. If connection is not good, it is disconnection - If it is disconnection, replace the wire.
  • Page 7 Classification Symptom Service Factor Temperature Temp trembling PCB Malfunction 1. Operate the Auto tuning. , If the temp is trembling after Auto tuning, It is PCB Malfunction Check point - Replace the PCB. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 8 Classification Symptom Service Factor Temperature Temp trembling Temp Sensor connection inferiority 1. Check the temp sensor terminal bolts of PCB. If bolts are loosening, it causes disconnection inferiority. Check point - Tighten the temp sensor terminal bolts of PCB. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 9 Classification Symptom Service Factor Temperature Variation Cause BIAS Value modification 1. Measure temp of the inner chamber using of A exterior temp detector installed in the middle. Check point If displayed temp and the temp detector value are different, Modify BIAS Value.. - BIAS Value Modification - 1.
  • Page 10 Classification Symptom Service Factor Temperature Temp trembling Temp Sensor connection inferiority 1. Check the temp sensor terminal bolts of PCB. If bolts are loosen, it cause disconnection inferiority. Check point - Tighten the temp sensor terminal bolts of PCB. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 11 Classification Symptom Service Factor Temperature Temp keeps rising SSR Malfunction 1. Separate the Input SSR of Harness. 2. Measure resistance checking SSR output using of the multi meter. (Resistance MODE) If resistance measure, it is SSR malfunction. Check point - Replace the SSR 1.
  • Page 12 1-2. Power Classification Symptom Service Factor Power No Power Fuse disconnection 1. Check the Fuse using of the multi meter. Check point If Resistance is not measured, Fuse disconnection. - Replace the Fuse. Solution 1. “” Reference 2. The assembly is reverse order of disjointing. Classification Symptom Service Factor...
  • Page 13 Classification Symptom Service Factor Power No Power PCB Malfunction 1. Check Voltage from output terminal of AC in PCB. If Voltage is measured without Power, PCB Malfunction. Check point - Replace the PCB. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 14 Classification Symptom Service Factor Power No Power Power code line disconnection inferiority 1. Check between Fuse holder and Soldering part of power code line. Check point If Soldering part is separated, disconnection inferiority - Replace the relay. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 15 Classification Symptom Service Factor Power Power shut off during operation PCB Malfunction 1. Turn on the Main power Switch. 2. Set the SV value 100°C, Press the Start Button to operate. 3. Check DC Voltage from heater output terminal in PCB. If Voltage is not measured, PCB Malfunction.
  • Page 16 Classification Symptom Service Factor Power Power shut off during operation. Electric capacity over in Multi outlet 1. Check an electric outlet capacity connected the unit. Check point 2. Check total units connected the multi electric outlet. If total units connected the multi electric outlet is over than the outlet capacity, multi electric outlet malfunction. Solution - Use the multi electric outlet under capacity.
  • Page 17 Classification Symptom Service Factor Power Power shut off during operation. Wiring insulation malfunction 1. Check the fuse. 2. If fuse is down, replace it.. Check point 3. Check Resistance both ground wire and Main plug using of the multi meter. If resistance is measured, it is Wiring insulation malfunction.
  • Page 18 1-3. DISPLAY Classification Symptom Service Factor Display DISPLAY PCB error Push buttons error 1. Disconnect Display board from the panel, test pushing all buttons one by one Check point If you don’t detect any reaction from button, the Display board is out of order - Replace the Display board 1.
  • Page 19 Classification Symptom Service Factor Display DISPLAY PCB error Display error 1. Disassemble the Harness on the Display board, and re-assemble correctly. Check point If you still notice display error, the Display board is out of order - Replace the Display board 1.
  • Page 20 Classification Symptom Service Factor Display Display error Temp Sensor error 1. Replace a new Temp. Sensor. Check point If display is OK, the previous Sensor is out of order - Replace a temp sensor. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 21 Classification Symptom Service Factor Display Display error Harness contact error 1. Disassemble the Harness on the Display board, and re-assemble correctly. If Display turns OK, Harness contact was error Check point - Replace DISPLAY PCB 1. Refer to “2-1-1. Side Cover panel disassembly” Solution 2.
  • Page 22 1-4. Door Classification Symptom Service Factor Door Not closed Keeper damage 1. After dismantling the keeper and then check it. Check point 1. “2-1-12. Keeper disassembly” Reference Solution 2. The assembly is reverse order of disjointing. - 22 -...
  • Page 23 1-5. Current leakage Classification Symptom Service Factor Noise Heater leakage Circuit breaker activates 1. Check fuse status first. 2. Disconnect wiring on Heater contacts Check point 3. Measure resistance value on Heater surface and contact by using TESTER. If fuse blow and, any resistance is measured the heater is leaking.. - Replace heater..
  • Page 24 1-6. Communication Classification Symptom Service Factor Communication Communication error Communication Board error 1. Replace Communication Board Check point After replacing, if it works, the communication board is error. - Replace communication PCB. 1. “2-1-1. Side Cover panel disassembly” Reference Solution 2.
  • Page 25 1-6. Vacuum Classification Symptom Vacuum Vacuum leakage * How to check the leaking point * - Easily error parts. - 1. Check and replace Door packing with vacuum status. 2. Check if Vent Valve fixing bolt is loosen.(if loosens easily.) 3.
  • Page 26 Classification Symptom Service Factor Vacuum Unit can’t have vacuum status Packing error 1. With reference of “How to check leaking point”, find the leaking point. 2. Check if there is dirty on the side of packing. 3. Check if the packing has any damage. Remove the dirty, and replace the damaged packing Check point - Replace a new packing.
  • Page 27 1. “2-1-7. 3 way valve disassembly” Reference 2. “2-1-10. Temperature Sensor controller disassembly” Reference 3. The assembly is reverse order of disjointing. Classification Symptom Service Factor Vacuum Unit can’t have vacuum status Door closing error 1. Check if there is dirty on the side of packing. Check point 2.
  • Page 28 Classification Symptom Service Factor Vacuum Vacuum is leaking 3 way valve error 1. With reference of “How to check leaking point”, find the leaking point. Check point If 3 way valve fixing nut is loosened, fasten them. - Replace a new 3 way valve. 1.
  • Page 29 Classification Symptom Service Factor Vacuum Vacuum is leaking Inner chamber has crack 1. With reference of “How to check leaking point”, find the leaking point. Check point - Replace the inner chamber. Solution * This job is hard to be performed at site. - 29 -...

  • Page 30: Disassembly & Inspection

    2. Disassembly & Inspection 2-1. Disassembly 2-1-1. Side Cover panel disassembly “+” Loosen circled blots Disconnect harness on the side Disassembly has been done. using ”+” driver. - 30 -...
  • Page 31 2-1-2. Door packing disassembly. Pull out the packing to the arrow Done *When reassembling, be careful of the packing direction. - 31 -...
  • Page 32 2-1-3. Main board PCB disassembly Disconnect the circled harness. Loosen fixing bolt by using “+” driver. Loosen fixing bolt by using “+” Done ※ Warning : carefully connect driver. Temperature sensor. - 32 -...
  • Page 33 2-1-4. SSR disassembly Disconnect wires on SSR Loosen blots by using “+” Disconnect SSR driver 2-1-5. Relay disassembly Disconnect the circled. Loosen blots by using “+” Done driver - 33 -...
  • Page 34 2-1-6. Noise Filter disassembly Disconnect the bolts by using 7mm Loosen blots by using “+” driver vox driver. - 34 -...
  • Page 35 2-1-7. 3 way valve disassembly Remove the circled headless bolts. Remove handle Loosen the circled bolts. Disconnect control panel. Loosen the circled bolts. Loosen the circled valve fixing nut. Loosen the circled nut to the arrow way. - 35 -...
  • Page 36 2-1-8. Heater disassembly. Loosen and remove fixing port on Loosen and remove the fixing bolt When replacing Heater, it is not the right and left. on the rear. recommended disassemble Chamber Jacket, Chamber, because this procedure is quite complicate. 2-1-9. Display PCB disassembly The circled is Display PCB.
  • Page 37 2-1-10. Temperature control Sensor disassembly The circled is Temperature control Sensor Remove all Shelf Loosen the circled bolt and remove bottom shelf. Loosen the circled bolt to remove Temp Loosen nut on the Reducer, remove out to Sensor Block the arrow direction. - 37 -...
  • Page 38 2-1-11. High Temp Limit Sensor disassembly. The circled is Sensor wire. Pull out to the arrow direction. Done. - 38 -...
  • Page 39 2-1-12. Keeper disassembly. Loosen the fixing bolts Done. 2-1-14. Communication Board disassembly. Disconnect harness. Loosen bolts by using 5mm vox Done. wrench.(Refer to OF disassembly.) - 39 -...
  • Page 40 2-2. Inspection 2-2-1. Output voltage of Relay on Main Control Board 1. Press “START” key to operate unit. 2. Measure output voltage of terminal with voltage meter (DC MODE) - 40 -...
  • Page 41 2-2-2. Output voltage of Heater on Main Control Board 1. Set temperature above PV(actual value) and press “START” key. 2. Check out HEAT LED on display. (It should be ON.) 3. Measure output voltage of terminal with voltage meter. (DC MODE) - 41 -...
  • Page 42 2-2-3. AC input voltage of Main Control Board 1. Switch ON. 2. Measure AC input voltage with voltage meter (AC MODE). - 42 -...
  • Page 43 2-2-4. Short-circuit of Heater Measure resistance of heater with resistance meter. - 43 -...
  • Page 44 2-2-5. Current leakage of Heater Measure resistance with resistance meter. - 44 -...
  • Page 45 2-2-6. Noise Filter defect 1. Switch ON. 2. Measure output voltage with voltage meter.(AC MODE) - 45 -...
  • Page 46 2-2-7. Main Power Switch defect 1. Switch ON. 2. Measure output voltage with voltage meter(AC MODE). - 46 -...
  • Page 47 2-2-8. SSR Board defect 1. Take out harness of SSR input. 2. Measure resistance of SSR output with resistance meter. - 47 -...
  • Page 48 2-2-9. Wire snap 1. Resistance meter. 1. Switch ON. Measure between plug and Input Measure between plug and output 2. Measure resistance between 2. Measure output between plug of Noise filter. of Noise Filter. plug and fuse holder. and main power switch. Measure between plug and Relay.

This manual is also suitable for:

Ov-12