PWB-TOP
PWB-TOP
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SHARP UX60S - SHARP UX40S - FAX - POWER SUPPLY SCHEMATIC [Circuit Diagram]
PWB-TOP
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SHARP UX-A460DE – UX-A460H - FAX - MAIN POWER SUPPLY SCHEMATIC (Circuit Diagram)
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PCB TOP SIDE
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LC20SH1-E - SHARP - SCHEMATIC DIAGRAM [Circuit Diagram) - BACK-LIGHT INVERTER - POWER - STRW67652E (Power Switching)
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INVERTER
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PANASONIC SC AKX50LB - CD Stereo system - Power Amp - Main power SMPS - Schematic (Circuit Diagram) - C1BA00000497 (Power Amp IC) -[TDA 8950J]
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TDA8950J
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SC AKX72LN - PANASONIC CD STEREO SYSTEM - SCHEMATIC [SMPS - Power Amp]
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POWER AMP - SCHEMATIC
POWER AMP - PWB
SMPS - PWB
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PANASONIC SC AKX52LB - SCHEMATIC (Circuit Diagram)- SMPS - POWER AMPLIFIER
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POWER AMP PWB
SMPS PWB
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SONY ICF CD2000 - CLOCK -RADIO - CD PLAYER - HOW TO DISASSEMBLE
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CABINET UPPER
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HOW TO ENTER SERVICE MODE - SONY ICF CD 2000 - TEST MODE
- Connect TP447 (CD TEST 2) to the TP444 (GND).
- Turn ON the S423 (CD OPEN switch).
- Insert external power supply.
- Connect TP453 (RESET) to the TP444 (GND) to make open. (Reset).
SERVICE MODE OPERATION
- Once the service mode is affected, the LCD displays 18 indications each of which is repeatedly displayed.
- By pressing the >>| or |<< key, the optical pick-up is movable inwardly or outwardly. However, if this is activated, tracking servo and sled servo are turned OFF, so it can be turned ON by pressing the [BAND]key if required.
- Without disk, focus searching is repeated continuously.
- By pressing the [BAND key, tracking servo, sled servo and CLV-A (servo in PLAY) are turned ON. Then playing begins. No muting is ON in the service mode.
RESETTING SERVICE MODE
- Remove external power supply.
- Disconnect TP447 (CD TEST 2) and TP444 (GND), and also TP453 (RESET) and TP444 (GND).
TEST MODE
Connect TP445 (CD TEST 1) to the TP444 (GND).Insert external power supply.
- The CD auto adjustment is not performed, but LCD test mode is displayed. Also, ESP is placed in OFF state and it does not turn ON.
- The sled is operating while the >>|or |<< key is pressed. At this time, the spindle and tracking servos turn OFF.
- The focus search is performed until the focus becomes OK, if the CD >>| key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc.
- The spindle and tracking servos turn ON when the BAND key is pressed. Also, the mute turns OFF if the data is correct.
Resetting of Test Mode -1
Remove external power supply.Disconnect TP445 (CD TEST 1) and TP444 (GND).
TEST MODE -2
Connect TP447 (CD TEST 2) to the TP444 (GND).
Insert external power supply.
- The CD auto adjustment is performed. Also, the ESP can be turned ON or OFF.
- The sled is operating while the>>| or |<< key is pressed. At this time, the spindle and tracking servos turn OFF.
- The focus search is performed until the focus becomes OK, if the CD ►|| key is pressed. At this time, the spindle and tracking servos turn OFF. Also, when the focus becomes OK, the optical pick-up moves to almost center of 12 cm disc.
- The spindle and tracking servos turn ON when the BAND key is pressed. Also, the mute turns OFF if the data is correct.
- The pickup jumps by one track if ►►| or |◄◄ key is pressed when the spindle and tracking servos turn ON, or it jumps continuously if the key is kept pressed. Also, if the PRESET key is pressed, the following operation is performed.
[PRESET 2] 4 track jump
[PRESET 3] 16 track jump
[PRESET 4] 32 track jump
[PRESET 5] 256 track check- The pickup jumps to the second music and the test mode is released, if CD ►|| key is pressed when the spindle and tracking servos turn ON.
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SAMSUNG MAX G55TD - Power Amp Schematic - MICOM Initialization _ MPEG Update _ TDA8920
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MICOM Initial
In STANDBY condition, press “STOP” button of Main Unit 5 seconds more, time display as ‘--:--’.
Then Initialization is complete.MICOM update is enabled via USB and CD/DVD.
- Copy MICOM update file to CD/DVD/USB. File name is “micom.ssp”, “update.ver”.
- DVD Model: OSD shows update screen. You have to make sure your update file is most recently version.
- Press “ENTER” to proceed.
- CD Model: VFD shows “reading”. And “update” shows up and blinking. Wait until MAIN set automatically power off.
- Copy MPEG update file to CD/DVD/USB. File name is “DCMCXXXW.bin”
- DVD Model: Osd shows update screen. You have to make sure your update file is most recently version.
- Press “ENTER” to proceed.
- CD Model: VFD shows “reading”. And “update” shows up and blinking. Wait until MAIN set automatically power Off.
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TDA 8920BTH - TDA 8920BJ – (by PHILIPS) – 2 x 100W Class-D Power Amplifier (Typical Application Schematic) - Pinning Information
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BLACK & DECKER VECO12BD - BATTERY CHARGER - SHCEMATIC - (Circuit diagram)
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TEAC AG D9260 Digital Home Theater system – Schematic Diagram (Circuit diagram)
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PWBs
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NIDEK MARK-5 - NUVO M5C5 OXYGEN CONCENTRATOR - TROUBLESHOOTING - Medical Equipment
Capacitor Replacement.
The capacitor helps the compressor to start and run more efficiently. If the compressor cannot start, the capacitor may be defective and require replacement. The capacitor should be replaced at each compressor service / module replacement. To replace the capacitor, take the following steps:
- Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.
- Remove the rear and front cabinets.
- Disconnect the two leads to the capacitor and remove the nut from the mounting screw.
- Remove the nut and washer below the capacitor.
- To install the new capacitor, connect the leads and replace the capacitor and associated hardware.
The Mark5 Nuvo uses a gear motor powered rotary cam-operated puppet valve assembly to control the air separation process. There is a feed port that connects to the air tank and an exhaust port that connects to the exhaust muffler. There are three possible valve states as follows:
- Air feed connected to sieve bed A and exhaust connected to sieve bed B.
- Air feed connected to sieve bed B and exhaust connected to sieve bed A.
- Both ports closed; this is a very short time period during which air pressure builds in the air tank. The control valve of the Mark5 Nuvo unit requires no scheduled maintenance. If a valve does not function as required, it is best to replace the complete sieve module as it is probable that one or both of the beds has been damaged.
SIEVE BED REMOVAL
Do not expose molecular sieve (contents of bed) to air for an extended period of time. Prolonged exposure of molecular sieve to the moisture in room air results in contamination and permanent damage to the sieve material. Keep all openings to the sieve beds sealed during periods of storage. If replacement is necessary, you must replace both sieve beds at the same time. It is recommended to replace the sieve beds and control valve module as a complete assembly.
- Set the unit’s I/0 (ON/OFF) switch to the 0 (OFF) position and unplug the power cord.
- Remove the cabinet back.
- Disconnect the 1/4-inch product tube from the top of one of the beds.
- Remove the 4 tie-wraps ( 2 from each sieve bed ). Note their position and orientation.
- Remove two “Z” brackets; one from the top of each of the sieve beds.
- Lift the module up and out of the base plate cradle.
- Unplug the valve gear motor electrical leads at the in-line connections.
- Manipulate the module so that the black exhaust hose can be removed from the fitting on the valve.
- Loosen the hose clamp and remove the black feed hose from the fitting on the valve.
To install the sieve beds, follow the sieve bed removal procedure in reverse order. It is very important to tighten all tubes to eliminate leaks. However, do not over tighten.
To check for leaks, take the following steps:
- Plug in the unit.
- Set the unit’s I/0 (ON/OFF) switch to I (ON) for three minutes with the flow meter closed to pressurize the system.
- Apply soapy water around the hose connections at the valve and the air tank; check for leaks.
NOTE: Even small leaks can affect concentrator performance and can cause contamination of the sieve. Careful leak testing is important.
TROUBLESHOOTING
Air Pressure Test (P1)
Testing the operating pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing. Units functioning normally do not require operating tests. Use the following procedure to test the operating pressure of the unit.
- Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.
- Remove the cabinet rear.
- Remove the test port plug at the top of the air tank.
- Connect the pressure test gauge to the test port.
- Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow meter to 5 l/min, and allow the unit to run at least five minutes.
- Observe the maximum and minimum readings on the pressure test gauge.
- The maximum reading should not exceed 34 psig (235 kPa). The minimum reading should not be less than 16 psig (110 kPa).
Higher than normal operating pressure may indicate any of the following:
► A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system freely. Operate the unit with the exhaust muffler disconnected to see if the operating pressure returns to normal.
► An improperly operating control valve, confirm that the control valve is turning at 4 rpm. Time the exhaust pulse at 7.5 seconds.
► Contaminated sieve beds. Change the sieve beds.
Lower than normal operating pressure may indicate any of the following:
► A restriction in the suction resonator or inlet air filter, which limits the amount of room air available to the compressor. Disconnect the suction tube at the compressor, and allow the unit to operate without the suction resonator to see if normal operating pressure returns.
► An improperly operating control valve. Confirm that the control valve does not have a leak.
► A leak in the unit, which allows system pressure to escape. Leak test the unit.
► A compressor with reduced output. Ensure that the concentration level at the desired liter flow is within specifications
Product Pressure Test (P2)
Testing the product pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing. Units functioning normally do not require operating tests. Use the following procedure to test the product pressure of the unit.
- Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.
- Remove the cabinet rear.
- Remove the test port plug from the tee at the top of the sieve bed.
- Connect the pressure test gauge to the P2 test port.
- Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow meter to 5 l/min, and allow the unit to run at least five minutes.
- Observe the maximum and minimum readings on the pressure test gauge. The maximum reading should not exceed 16 psig (110 kPa). The minimum reading should not be less than 9 psig (62 kPa).
Lower than normal operating pressure may indicate any of the following:
► An inlet air filter that limits the amount of room air available to the compressor. Disconnect the suction tube at the compressor, and allow the unit to operate without the suction resonator to see if normal operating pressure returns.
► An improperly operating control valve. Confirm that the control valve does not have a leak.
► A leak in the unit, which allows system pressure to escape. Leak test the unit.
► A compressor with reduced output. Ensure that the concentration level at the desired liter flow is within specifications.
High Product Pressure
Higher than normal operating pressure may indicate any of the following:
► A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system freely.
► Operate the unit with the exhaust muffler disconnected to see if the operating pressure returns to normal.
► Check exhaust muffler and hoses for any restrictions.
► An improperly operating control valve, confirm that the control valve is turning at 4 rpm. Time the exhaust pulse at 7.5 seconds.
► Contaminated sieve beds. Change the sieve beds.
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General Troubleshooting - NIDEK MARK-5 NUVO M5C5 – Oxygen Concentrator (Medical Equipment)
Before reviewing the troubleshooting chart, the following steps may be useful to isolate any malfunctions:
Turn the concentrator on. If unit does not turn on, refer to troubleshooting chart.
- Make sure all filters are clean.
- Turn flow meter completely open, up to the highest setting. The ball should rest at the top of the scale. If setting is not greater than 5.5 l/min, adjust regulator so that the ball level exceeds 5.5 l/min with the flow meter completely open.
- Connect test pressure gauge to the outlet fitting of the unit. The pressure should read approximately 7 psig (50 kPa).
- Connect test pressure gauge to the P1 test port on the air tank. The pressure should be cycling between approximately 16 and 34 psig (110 and 235 kPa).
- Make sure the unit is cycling properly by observing the pressure gauge cycle between a high and a low pressure. If the unit is not cycling properly, refer to troubleshooting chart.
- Make sure that the unit is leak free by testing all tubing connections and fittings with leak testing solution. Protect circuit board from solution and start leak test at the heat exchanger, following the air flow through the unit to the oxygen outlet. Repair all leaks by tightening connections and fittings.
- Set the concentrator at 5 l/min and connect pressure test gauge to P2 at the top of the sieve beds. Determine pressure parameters by observing high and low pressure points on the gauge. It should cycle between approximately 9 psig and 16 psig (62 to 110 kPa). If pressures are high or low, refer to the troubleshooting chart.
Review troubleshooting chart to isolate and repair any other malfunctions. The following diagnostic flow chart will help to isolate potential problems.
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Tool Kit and Pressure Test Gauge
The tools needed for you to properly service the Mark5 Nuvo unit are listed below:
► Requires no special tools; generally available tools including common pliers, channel lock, wire cutters, needle-nose pliers, slotted-head screwdriver, long Phillips head screwdriver, 8-inch adjustable wrench, 7/16-inch socket, 7/16-inch combination wrench, 5/8-inch combination wrench and 3/8-inch combination wrench.
► For convenience, it is desirable to have a battery operated drill motor available to remove and install screws.
► An accurate pressure test gauge to take both high and low pressure readings on the Mark5 Nuvo unit should be kept available at all times. This gauge connects to the pressure test ports on top of the air tank and on top of the sieve bed.
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Disassemble Procedure - NIDEX MARK-5 NUVO M5C5 Oxygen Concentrator [part-1]
Base Assembly
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Medical Equipment - NIDEK NUVO M5C5 - DISASSEMBLY PROCEDURE - Part-2
Contn:
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Control Panel Assembly Unit - without OCSI - Front View
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Control Panel Assembly Unit - with OCSI - Rear View
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Control panel assembly - standard unit - without OCSI - Front View
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Rear View
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Air Tank Assembly
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Front Cabinet Assembly
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Contd:
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MARK-5 NUVO-NIDEK M5C5 – Oxygen Concentrator - Disassembly Procedure - Medical Equipment (Part-3)
Part-3. Contn:
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Removing Cabinet Back
To remove the cabinet back, remove two screws near the base (one on each side) and two inset screws at the top just under the handle.
Removing Cabinet Front
To remove the cabinet front, remove two screws near the base (one on each side) adjacent to the rear cabinet screws and two inset screws at the top just under the handle. It is necessary to remove the cabinet back to access the top screws.
Removing Control Panel
Eight screws hold the control panel in place; the front cover must be removed to access these screws. It is necessary to remove the electrical wiring and pneumatic tubing to fully release the control panel.
Main Structure
The weight and forces of the internal components rest solely on four parts: the main structure, the compressor plate, the base-plate and the base. These parts were specially designed and formed. They should never require replacement under normal use.
Caster Replacement
The casters are a push in type that does not require any fastener. Lay the device on its back to access the casters from the bottom. Pull them straight out away from the bottom.
Compressor
The compressor is the pump within the oxygen concentrator that supplies air to the separation process performed by the sieve beds. The pressure generated by the compressor forces oxygen to flow out of the top of the sieve columns. The compressor is the likely cause of two potential specific problems:
- An insufficient amount of air is supplied to the process, and
- An excessive sound level.
Compressor output refers to how much compressed air the compressor can produce. This depends upon the model of the compressor, length of stroke, piston diameter, speed of rotation and condition of seals. The cup seals form the seal between the piston and the cylinder wall. As the cup seals wear, the output begins to gradually decrease. This reduction in compressor output results in less air, and thus less oxygen, entering the sieve beds. Therefore, the production of oxygen decreases. Because this drop in oxygen production occurs over a long period of time, preventive maintenance on the compressor is not required.
Sound Level
The sound level is largely determined by the condition of the compressor’s bearings. There are four bearings located within the compressor that allow the inner components of the compressor to rotate. If the bearings wear to the point that they become loose and noisy, the compressor becomes noticeably loud and needs servicing. Primarily its operating temperature determines the life of a compressor. It is extremely important that the cabinet air filters are cleaned and replaced as required.
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HOW TO ENTER SERVICE MODE - TOSHIBA 32WL36 - LCD TV - LED BLINKING CODES - Universal Remote Control Set-up Codes
- Press MUTE key of remote hand unit to indicate MUTE on screen.
- Press again MUTE key of remote hand unit to keep pressing until the next procedure. (OSD display disappears.)
- In the status of above (2),press MENU key on TV set.
- During service mode, indication S is displayed at upper right corner on screen.
- Service mode is not memorized as the last-memory.
TEST SIGNAL SELECTION
The function of VIDEO test signal selection is cyclically changed with VIDEO key (remote unit) in Service mode.
SERVICE ADJUSTMENTS
ADJUSTMENT MENU INDICATION ON/OFF
MENU key (on TV set)
During display of adjustment menu, the followings are effective.
Selection of adjustment item: POS UP/DN key (on TV/Remote unit)
Adjustment of each item: VOL UP/DN key (on TV/Remote unit)
Direct selection of adjustment item
R CUTOFF : 1 POS (Remote unit)
G CUTOFF : 2 POS (Remote unit)
B CUTOFF : 3 POS (Remote unit)
Data setting for PC unit adjustment
SUB CONTRAST : 4 POS (Remote unit)
SUB COLOR : 5 POS (Remote unit)
SUB TINT : 6 POS (Remote unit)
Screen adjustment mode ON/OFF: Previous
Test signal selection: VIDEO (Remote unit) # In service mode, serviceable items are limited.
Self check display : 9 POS (Remote unit). Cyclic display
Initialization of memory(QA02 E2PROM) : CALL(Remote unit)+POS UP(TV)
Caution :All data of memory IC(including factory setting value) is initialized by this operation. (Replacement of memory IC is required.)
Initialization of self check data: CALL(Remote unit)+POS DN(TV)
BUS OFF: CALL(Remote unit)+VOL UP(TV).
FAILURE DIAGNOSIS [LED BLINKINGS]
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EXECUTING THE SELF DIAGNOSIS FUNCTION
- Set to service mode.
- Pressing “9” key on remote unit displays self diagnosis result on screen.
- Every pressing changes mode as below.
- SERVICE mode à SELF DIAGNOSIS mode àM2 System version info àVersion check(QA01,QM24 etc)
- To exit from service mode, turn power off.
Self diagnosis mode
OSD/TEXT M2 sub-system information
Version check
Version check description
QA01**** -Version information for Main Micom (QA01)
QA02** -Version information for E2PROM(QA02)
QF14 ****-****-Version information for M2 Sub-Micom(QF14)
QM24** -Version information for BEP Sub-Micom (QM24)
QM17** -Version information for BEP E2PROM(QM17)
SELF DIGNOSIS FUNCTION INDICATIONS
URC Setup codes
1088 1077 1061 1070 1203 1423 1093 1466 1048 1213 1047 1141 1046 1231 1144 1276 1054
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Software Upgrade TOSHIBA 19AV500U - 26AV500U - 32AV500U - 37AV500U - 42AV500U - LCD TVs
- Computer with available RS232 or USB port
- 2008FWKT01 2008 Firmware Update Kit .
- Update Firmware for Model (Note: Contact Toshiba Technical Support for Part Number of the Update Firmware. The Firmware Update is NOT included with the 2008FWKT01 Kit)
- Install the USB to Serial Adapter drivers. Instructions are on the CD driver disc included with the adapter. Attach the USB to Serial Adapter to the USB port of your computer.
- Copy the contents of the supplied 2008FWKT01 Service Firmware Update Tool CD to a directory on your PC. Note the name and location of the directory for future reference.
- Copy the firmware update file (file extension .ecc) for the model being serviced to the same directory location as in step 2. Note the name and location of the directory for future reference.
- To open the 2008FWKT01 “iDev” firmware update tool; use Windows Explorer locate the directory where you installed the CD files in step 2. Select the iDev directory and then click on theiDev.exesoftware Application.
- Select“Setup”from the iDev application.
- Select the Serial Port of which your USB to Serial Adapter is connected. (Note: when using the USB to Serial Adapter the Com ports are assigned by the operating system. Identify the correct COM port using your device manager in windows as reference. The USB to Serial
- Adapter must be connected to identify the assigned port)
- Set the Baud Rate to 115200.
- Select the BROWSE (…) button to open the image file browser.
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- Select the “Firmware update” file (with file extension .ecc) for the TV receiver being updated. The Firmware update file will be in the directory where you placed the contents from step 3 in the Installation and Setup procedure.
- Select Open.
- Select “Ok”
- Select” down” to start the download process.
- The Download image application will start and a message will indicate “Waiting for ping” Proceed to Section B “Upgrading the Firmware” procedure.
- Remove AC power from the TV receiver
- Connect the Serial Cable to the “Service Port” at the rear of the LCD TV receiver. Connect the Serial Cable to the USB to Serial Adapter between the Serial Cable and the PC USB port as shown below.
- Apply AC power to the TV receiver. Confirm the TV receiver is in the “Off” state.
- Confirm that all steps of the “Installation and Setup of the iDev Software Tool and USB Drivers” were completed and the iDev software is “waiting for ping” as described.
- Turn on the TV receiver to begin the download as shown below. Do not remove AC power or interrupt the set during the download progress.
- Upon completion of the firmware update a “Finished, Please reset the HDTV” banner will be displayed.
- To reset, remove AC power to the TV receiver.
- Reconnect AC power after the reset and confirm the firmware update by checking the version. (Enter Setup Menu and select “System Status” to verify version.). Firmware update is complete.
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Oxygen Concentrator - NIDEK NUVO-8 - TROUBLESHOOTING - Low product pressure - High product pressure - General troubleshooting.
Air Pressure Test (P1)
Testing the operating pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing. Units functioning normally do not require operating tests.- Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.
- Remove the cabinet rear.
- Remove the air supply tubing going to the control valve and install the test port T-fitting. Figures shows the normal operating configuration for the unit. and the installation of the test ports.
- Connect the pressure test gauge to the test port.
- Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow meter to 8 l/min, and allow the unit to run at least five minutes.
- Observe the maximum and minimum readings on the pressure test gauge.
- The maximum reading should not exceed 40 psig (275 kPa). The minimum reading should not be less than 13 psig (90 kPa).
High Operating Air Pressure (P1)
Higher than normal operating pressure may indicate any of the following:
- A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system freely.
- Contaminated sieve beds. Change the sieve beds.
Lower than normal operating pressure may indicate any of the following:
- A restriction in the suction resonator or air intake filter, this limits the amount of room air available to the compressor. Disconnect the suction tube at the compressor, and allow the unit to operate without the suction resonator to see if normal operating pressure returns.
- An improperly operating control valve. Confirm that the control valve does not have a leak.
- A leak in the unit, which allows system pressure to escape. Leak test the unit.
- A compressor with reduced output. Ensure that the concentration level at the desired liter flow is within specifications listed.
Testing the product pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing. Units functioning normally do not require operating tests. Use the following procedure to test the product pressure of the unit.
- Set the I/0 (ON/OFF) switch to the 0 (OFF) position, and unplug the power cord.
- Remove the cabinet rear.
- Remove the plug from the T-fitting atop the valve and install the test port tubing (1/4” OD tubing is required). Figure 1 above shows the normal operating configuration for each unit. Figure 2 shows the installation of the test port tubing.
- Connect a pressure test gauge to the P2 test port tubing.
- Plug in the power cord, and set the I/0 (ON/OFF) power switch to the ON position. Set the flow meter to 8 l/min, and allow the unit to run at least five minutes.
- Observe the maximum and minimum readings on the pressure test gauge. The maximum reading should not exceed 40 psig (275kPa). The minimum reading should not be less than 13 psig (90 kPa).
Lower than normal operating pressure may indicate any of the following:
- An inlet air filter that limits the amount of room air available to the compressor. Disconnect the suction tube at the compressor, and allow the unit to operate without the suction resonator to see if normal operating pressure returns.
- An improperly operating control valve. Confirm that the control valve does not have a leak.
- A leak in the unit, which allows system pressure to escape. Leak test the unit.
- A compressor with reduced output. Ensure that the concentration level at the desired liter flow is within specifications listed.
Higher than normal operating pressure may indicate any of the following:
- A restrictive exhaust muffler, which does not allow the waste (purge) gas to exit the system freely.
- Check exhaust muffler for any restrictions
- Contaminated sieve beds. Change the sieve beds.
GENERAL TROUBLESHOOTING
Before reviewing the troubleshooting chart, the following steps may be useful to isolate any malfunctions:- Turn the concentrator on. If unit does not turn on, refer to troubleshooting chart.
- Make sure all filters are clean.
- Turn flow meter completely open, up to the highest setting. The ball should rest at the top of the scale. If setting is not greater than 8.5 l/min, adjust regulator so that the ball level exceeds 8.5 l/min with the flow meter completely open.
- Connect test pressure gauge to the outlet fitting of the unit. The pressure should read approximately 17 psig (117 kPa).
- Connect test pressure gauge to the P1 test port on the valve inlet. The pressure should be cycling between approximately 13 and 40 psig (90 and 275 kPa).
- Make sure the unit is cycling properly by observing the pressure gauge cycle between a high and a low pressure. If the unit is not cycling properly, refer to troubleshooting chart.
- Make sure that the unit is leak free by testing all tubing connections and fittings with leak testing solution. Protect circuit board from solution and start leak test at the compressor outlet, following the air flow through the unit to the oxygen outlet. Repair all leaks by tightening connections and fittings.
- Set the concentrator at 8 l/min and connect pressure test gauge to P2 at the top of the sieve module. Determine pressure parameters by observing high and low pressure points on the gauge. It should cycle between approximately 13 psig and 40 psig (90 to 275 kPa). If pressures are high or low, refer to the troubleshooting chart.
- Review troubleshooting chart to isolate and repair any other malfunctions.
The following diagnostic flow chart will help to isolate potential problems.
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