Magnavox. Emerson and Funai 32 inch LCD TVs – service mode, firmware update, power board schematics and power supply troubleshooting

Electrical adjustments are required after replacing circuit components and certain mechanical parts. It is important to perform these adjustments only after all repairs and replacements have been completed.

Do not attempt these adjustments unless the proper equipment is available

TYPE A
2ME303V/F7 MAGNAVOX (Serial No.: ME1, ME2)
LF320EM4 EMERSON (Serial No.: ME1, ME3)
LF320EM4F EMERSON (Serial No.: ME1, ME2)
LF320FX4F FUNAI (Serial No.: ME1)

TYPE B
LF320EM4 EMERSON (Serial No.: DS1)
LF320EM4F EMERSON (Serial No.: DS1)
LF320FX4F FUNAI (Serial No.: DS1, DS2)

How to set up the service mode
1. Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Features”.
4. Select “Software Upgrade”.
5. Select “Current Software Info”.
6. Press [0], [4], [2], [5], [7], [4] and [INFO] buttons on the remote control unit in this order.

The service mode screen appears.

Purity Check Mode
This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the service mode.
2. Each time the [7] button on the remote control unit is pressed, the display changes.

To cancel or to exit from the Purity Check Mode, press [CH RETURN] or [PREV CH] button.

The VCOM Adjustment should be performed when replacing the Digital Main CBA for LF320EM4(Serial No.: DS1), LF320EM4F(Serial No.: DS1), and LF320FX4F(Serial No.: DS1, DS2).

1. Operate the unit for more than 60 minutes.
2. Set the color analyzer at the zero point calibration and bring the optical receptor pointing at the center of the LCD-Panel.
Note: The optical receptor must be set perpendicular to the LCD Panel surface.
3. Enter the service mode.
4. Press [2] button on the remote control unit.
5. Press [CHANNEL UP/DOWN] buttons on the remote control unit so that the color analyzer value becomes minimum.
6. To cancel or to exit from the VCOM Adjustment, press [CH RETURN] or [PREV CH] button.

White Balance Adjustment

The White Balance Adjustment should be performed when replacing the LCD Panel or Digital Main CBA.

Symptom of Misadjustment: White becomes bluish or reddish.

1. Operate the unit for more than 60 minutes.
2. Enter the service mode.
3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode. “Drive” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.

[The optical receptor must be set perpendicularly to the LCD Panel surface.]
5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears in the screen.)

7. Press [CHANNEL UP/DOWN] buttons to adjust the color temperature becomes 12000°K (x= 0.272 / y= 0.278 ± 0.003).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.

11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
12. If necessary, adjust the “LDB” or “LDR” again.
13. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode.
If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry again.” Is displayed, repeat above steps from 5. to 12. Then check “Debugging Message” again. If “Drive settings are NG. Retry again.” is displayed, replace the LCD Panel or Digital Main CBA.
14. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.

TO INITIALIZE THE LCD TV

The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized.
To put the program back at the factory-default, initialize the LCD TV using the following procedure.

[Disconnect any device from the USB Port before you conduct on this procedure.]

1. Turn the power on.
2. Enter the service mode.
- To cancel the service mode, press [Power] button on the remote control unit.
3. Press [BACK] button to enter the Control Panel Key Confirmation Menu.
4. Press any button on the control panel.
5. Press [INFO] button to proceed with the self check mode.
6. Make sure to confirm the “INITIALIZED FINISH” appears in the green screen.
7. Unplug the AC Cord and plug it back on again.

SMPS SCHEMATIC

There are two types of power board fitted with these TVs.

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.If Main Fuse (F602) is blown , check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.

For continued protection against risk of fire, replace only with same type 2.5A, 250V fuse.

The voltage for parts in hot circuit is measured using hot GND as a common terminal.

Type 1 PWB and Schematic

Type 2 PWB and schematic

Click on the pictures to zoom in

Power board Troubleshooting

* The power cannot be turned on.

Is the fuse (F602) normal? – No > 

The fuse blows out.
Is normal state restored when once unplugged power cord is plugged again after several seconds? – NO

✓ Check if there is any leak or short-circuit on the primary circuit component and repair it if defective. Check these components.
(C607, D601, D602, D603, D604, D605, D607A, D608, D609A, D621, D623, Q601, Q602, Q621, R611, T601)

If yes:

Is the P-ON+21V line voltage normal?

If yes

✓Check each rectifying circuit of the secondary circuit and repair it if defective. Check for any short circuited components.

If NO:

✓Check if there is any leak or short-circuit on the primary circuit component and repair or replace the defective component/s. Check:
(C607, D601, D602, D603, D604, D605, D607A, D608, D609A, D621, D623, Q601, Q602, Q621, R611, T601)

The fuse blows out

✓ Check if there is any leak or short-circuit on the primary circuit component and repair it if defective.

✓Check if there is any leak or short-circuit on the each rectifying circuit component of secondary side and repair/replace it if found defective.

 [NB]: Make sure to repair the primary circuit component before replacing the fuse (F602).

The output voltage fluctuates.

Does the photocoupler circuit on the secondary side operate normally?

NO?

✓Check IC602, D660, D661, Q653 and their periphery circuit. Repair it if defective.

If yes:

✓Check IC602, D605, D607A, D608, D609A, D610, D621, D623, Q601, Q602, Q621 and their periphery circuit.
Repair/ replace the defective component/s.

When buzz sound is heard in the periphery of power circuit.

✓Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side.
Repair it if defective. (D650, D651, D653, D655, Q656, Q658) [ A slight loose fitting of the ferrite core of any converter transformers too will make a buzzing sound. Check for it too]

P-ON+21V is not output.

Is approximately +21V voltage supplied to the cathode of D650(D651)?

NO?

✓Check D650, D651, C651, C652, C653 and their periphery circuit. Repair it if defective.

If yes:

✓Check if there is any leak or short-circuit on the load circuit. Repair it if defective.

AMP+13V is not output.

Is approximately +13V voltage supplied to the cathode of D653(D655)?

NO?

✓Check D653, D654, D655, C654, C655 and their periphery circuit. Repair it if defective.

If yes:

✓Check if there is any leak or short-circuit on the load circuit. Repair it if defective.

AL+3.3V is not output.

Is approximately +13V voltage supplied to the collector of Q656?

NO?

Is approximately +13V voltage supplied to the emitter of Q658?  If yes: Replace Q658

If NO: 

✓Check D653, D654, D655, C654, C655, R690 and their periphery circuit. Repair it if defective.

Approximately +13V voltage is at  the collector of Q656

Is approximately +4V voltage supplied to the base of Q656? NO? Check D662 and their periphery circuit. Repair it if defective.

If yes:

Replace Q656.

Firmware Update Procedure
User Upgrade (Filename example: TVNB012_00_UF_XX91_AC.ecc)
Upgrade the firmware only. The setting values will not be initialized.
The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename.
If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.

Update procedure
1. Turn the power on.
2. Press [MENU] button to display Menu.
3. Select “Features”.
4. Select “Software Upgrade”.
5. Select “Upgrade” to display Upgrade screen.
6. Press [OK] button to display Software Upgrade screen.
7. Select “USB” and press [OK] button.
8. Insert the USB storage device to the USB port

9. Select “Check” and press [OK] button.
10. Select “Upgrade” and press [OK] button to start software upgrade.

11. The update will start and the upgrade screen will appear.

[If the screen isn’t displayed, repeat from step 1.]

12. When the firmware update is completed, the following will appear in the screen.

Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.

Factory Upgrade (Firmware Upgrade/Flash Upgrade)
Firmware Upgrade(Filename example: FACT_TVNB012_00_UF_XX91_AC.ecc)

Upgrade the firmware and initialize the setting values.
The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename.
If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.
Flash Upgrade
(Filename example: ALL_TVNB012_00_UF_XX91_AC.ecc)
Upgrade the firmware and initialize the setting values along with the factory default such as White Balance, etc.
Before the upgrade, you will need to make a note of all the factory default so you will be able to set it back on the TV after the initialization.
The Flash Upgrade will be done by it's unique file.
The User Upgrade/Firmware Upgrade (Factory Upgrade) file cannot be used for this upgrade.

Procedure
1. Turn the power off.
2. Insert the USB storage device to the USB port.

3. Turn the power on.

4. The update will start and the upgrade screen will appear.

5. When the firmware update is completed, the relevant screen will appear in the screen.

Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.
Service mode initial screen with a word “INITIALIZED” will appear in the screen. The color of the word “INITIALIZED” will change from red to green when initialization is completed.

Hitachi 50V500/LC37, 60V500A/LC37 (NTSC) System TV adjustments - Power board circuit diagram

Lamp replacement, memory initialization SMPS schematic, Factory reset and more ..

Leakage Current Hot Check
Plug the AC line cord directly into a 120V AC 60Hz outlet (do not use an isolated transformer for this check). Turn the AC power ON. Using a Leakage Current Tester (Simpson’s Model 228 or equivalent), measure for current from all exposed metal parts of the cabinet (antennas, screw heads, overlays, control shafts, etc.) particularly any exposed metal part having a return path to the chassis or to a known earth ground (water pipe, conduit, etc.). Any current measured must not exceed 0.5 MIU.

Leakage Current Cold Check
With the AC plug removed from the 120V AC 60Hz source, place a jumper across the two plug prongs. Using an insulation tester (DC500V), connect one lead to the jumper AC plug and touch the other lead to each exposed metal part (antennas, screw heads, metal overlays, control shafts, etc.), particularly any exposed metal part having a return path to the chassis should have a minimum resistor reading of 2.4M and a maximum resistor reading of 5.2M. Any resistance value below or above this range indicates an abnormality which requires corrective action. An exposed metal part having a return path to the chassis will indicate an open circuit.

The lamp in this product contains Mercury.  Dispose of properly in accordance with applicable environmental laws. For Recycling and Disposal information, contact your respective governmental agencies or the Electronic Industries Alliance at www.eiae.org (in the U.S.) or Electronic Product Stewardship Canada at www.epsc.ca (in Canada).

Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” components. 

LAMP REPLACEMENT

Lamp Life

The lamp life may vary based on usage of the LCD Rear PTV. Turning on and off frequently may shorten the life of the lamp.

Lamp Replacement
After extended use, if the TV picture turns dark, the color looks unusual or LAMP INDICATOR light turns on, then it is time to replace the lamp with a new lamp.

The lamp gets very hot. The lamp may explode if improperly handled. To avoid injury, please observe the following
precautions.
✓ Do not open lamp compartment or attempt to remove lamp assembly unless the lamp assembly is being replaced.
✓ Unplug the product’s power cord from the AC outlet before attempting to replace the lamp assembly.
✓ If the lamp is in use when failure occurs or if the lamp has exploded, wait at least 30-45 minutes for the lamp to cool before opening the lamp compartment or touching the lamp assembly or any broken pieces.
✓ Broken lamp pieces can cause injury. Handle with gloves to avoid cuts.
✓ Do not place any foreign objects inside the lamp compartment.
✓ When installing a new lamp, follow handling instruction included with the new lamp. Do not touch glass surface of new lamp.
✓ The lamp in this product contains Mercury. Dispose of properly in accordance with applicable environmental laws. For Recycling and Disposal information, contact your respective governmental agencies or the Electronic Industries Alliance at www.eiae.org (in the U.S.) or Electronic Product Stewardship Canada at www.epsc.ca (in Canada).
CAUTION
 ”LAMP” indicator will light when lamp becomes hot. Unplug product’s power cord from the AC outlet and allow lamp to cool for at least 30-45 minutes. If “LAMP” indicator is still lit, check the lamp unit assembly.

TYPE NAME: LC37 LAMP ASSEMBLY
PART NUMBER: UX21511

Power board schematic

P.W.B. ADJUSTMENT

Memory Initialization: Adjustment Procedure
∆ Enter I2C mode from the front panel by pressing and holding the INPUT and the POWER button for two seconds, then release.
Note: When entering the I2C menu mode, make sure to wait about two minutes after power off. If entering the I2C menu mode immediately after power off, the I2C menu page will appear but remote control operation will not work.
∆ Receive signal on the main picture. (NTSC, SDTV or HDTV).
Some menu pages have I2C adjustments for SDTV and HDTV. 

The set will automatically allow you to set these items only when a SDTV or HDTV signal is input to the COMPONENT jacks on the back of the TV.

∆ Check the OSD using , buttons on the Remote Control to scroll down and cursor [right]  and hold for two seconds to enter the selected Device.

∆ Press the EXIT button to exit I2C ADJUST mode.
∆ Press the EXIT button again to EXIT the I2C menu.

FACTORY PRESET (1)
✓ Cursor right  to select factory reset (Fact Reset) of the OSD and check that the set returns to delivery settings (CH 03).
✓ Do not unplug the set until this operation is completed and do not perform any key operation either, after this operation each setting is resets  automatically.

[When exchanging microprocessor and TV is turned on for first time, it requires initialization of Memory Initial of I2C. 

Enter to I2C Adjustment mode and reset Memory Initialize.]

RGB Amplitude Adjustment
Preparation for adjustment
(1) Recall user menu and select ‘Video’ _ ‘Picture Mode’ _ ‘Day’ _ ‘Reset’.
(2) Input 525p(480p) of RGB amplitude adj. signal into INPUT1 (Component) input.
Adjustment procedure
(1) Receive 525p(480p) signal (ASPECT 16:9 Standard).
(2) Select ‘RGB (480P)’ from Service Adj. Menu.
(3) Press and hold the “RIGHT ” cursor on the remote for 2 seconds or more to perform automatic adjustment.
(4) Wait until ‘Auto Adjusting’ OSD is disappeared.

Sub-contrast adjustment

-Preparation
* Receive Sub-contrast adjustment signal.
-Adjustment
(1) Select ‘SUB CONTRAST’ of Service Adj. Menu.
(2) Press “RIGHT" for over 2 seconds to perform automatic adjustment. When it’s completed, ‘Auto Adjusting’ on the screen will be disappeared.

Philips 221TE4l 21.5 inch full HD LCD TV Power board schematic – 715G4313

221TE4L (715G4313-P03-000-0030) – Philips 21 inch LCD TV SMPS circuit diagram

Used ICs: LD7576AGR, AOT8N65(FET), RT8482GS

Power board PWB and schematic

Click on the pictures to magnify

TX 55DX650B Panasonic LED TV – Power LED blinking [error] codes, hotel mode, data copy, System information, self check, SMPS schematic

Panasonic TX55DX650B LED LCD TV - Service adjustments

1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.
3. After servicing, do the touch current checks to prevent the customer from being exposed to shock hazards.
4. Always ensure cover label TBM4GU113 is correctly replaced before returning to customer.

Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such as a water pipe.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reverse the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUCH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0 mA d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

How to access System Information

1. While pressing [MENU] button on the remote control.

2. Select [ Help] and then select [System Information]

How to exit
Press the [RETURN] button on the remote control.

Hotel Mode
1. Purpose: To Restrict a function for hotels.
2. To access command to the Hotel mode setup menu.
In order to display the Hotel mode setup menu,  enter the following command (within 2 second).
[TV] : Vol.[Down] + [REMOTE] : AV (3 times)
The Hotel mode setup menu is displayed.

3. To exit the “Hotel mode”:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control or:

 pressing [EXIT] button on the remote control.

Data Copy by USB Memory
Purpose
a) Board replacement (Copy the data when exchanging A-board):
When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.

Following data can be copied.

User setting data: (inc. Hotel mode setting data)
Channel scan data
Adjustment and factory preset data.

b) Hotel (Copy the data when installing a number of units in hotel or any facility):
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.

Following data can be copied.
User setting data: (inc. Hotel mode setting data)
Channel scan data.

Preparation
Make pwd file as startup file for (a) or (b) in an empty USB Memory.
1. Insert an empty USB Memory to your PC.
2. Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default (New Text Document.txt).
3. Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name (a) or (b) and press ENTER.
File name:
(a) For Board replacement: boardreplace.pwd
(b) For Hotel: hotel.pwd

[Make only one file to prevent the operation error.
No any other file should be in USB Memory.]

Data Copy from TV set to USB Memory
1. Turn on the TV set.
2. Insert USB Memory with a startup file (pwd file) to USB Terminal.
On-screen Display will be appeared according to the startup file automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2770
(b) For Hotel: 4850
Data will be copied from TV set to USB Memory.
It takes around 1 to 2 minutes maximum for copying.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
5. Turn off the TV set.
Note:
Following new folder will be created in USB Memory for data from TV set.
(a) For Board replacement: user_setup
(b) For Hotel: hotel.

Data Copy from USB Memory to TV set
1. Turn on the TV set.
2. Insert USB Memory with Data to USB Terminal.
On-screen Display will be appeared according to the Data folder automatically.
3. Input a following password for (a) or (b) by using remote control.
(a) For Board replacement: 2771
(b) For Hotel: 4851
Data will be copied from USB Memory to TV set.
4. After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement: Data will be deleted after copying (Limited one copy).
(b) For Hotel: Data will not be deleted and can be used for other TVs.
5. Turn off the TV set.
Note:
1. Depending on the failure of boards, function of Data for board replacement does not work.
2. This function can be effective among the same model numbers.

TNPA6263-POWER BOARD - Schematic and PWB

Self Check

How to access

Self-check indication only:

While pressing [VOLUME ( - )] button on the main unit, press [BLUE] button on the remote control.

Self-check indication and forced to factory shipment setting:

While pressing [VOLUME ( - )] button on the main unit, press and hold the [MENU] button on the remote control for more than 3 seconds.

How to exit

Switch off the power with the [POWER] button on the main unit.

If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K."

Power LED blinking timing chart

When abnormality has occurred in the unit, the protection circuit operates, and reset to the stand by mode. 

At this time, the defective block can be identified by number of blinking of the Power LED on the front panel of the unit.

LCD Panel Test Mode

To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.

How to Enter

While pressing [VOLUME ( - )] button of the main unit, press [YELLOW] button of the remote control three times.

How to Exit

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

How to confirm

If abnormal picture is displayed, go into LCD Panel test mode to display  several test patterns.

Judge by the following method.

Abnormal picture is displayed:

 The cause must be in LCD Panel.

Normal picture is displayed: 

 The cause must be in A board.

Remarks: The test pattern is created by the circuit in the LCD Panel. In LCD Panel test mode,  this test pattern is displayed unaffected by signal processing for RF or input signal.

If the normal picture is displayed, LCD Panel must be okay and the cause of failure should be in A board. No more check.  Replace the A board. In most cases, data copy might be done as described above. 

Xterra Fitness treadmill – Xterra -TR6.8 – How to access engineering mode – How to calibrate

Xterra Fitness treadmill – Xterra -TR6.8 – How to access engineering mode – How to calibrate the treadmill – Error codes – LS – E1 – E2 – Treadmill Running belt adjustment – Running belt tracking – Running belt lubrication – LUBE Indication reset – Calibrating the treadmill

Xterra -TR6.8:Engineering mode and calibration 

If you want to set the Speed and Distance to Metric or if there is a problem with the speed and you would like to perform the calibration procedure, use the Engineering Mode. To enter Engineering Mode press, and hold for 5 seconds, the Start and Speed UP keys while installing the safety key. All the segments will light then the message window will display
software versions and tell you to press Enter.
* The display will ask for grade return. This will reset the incline to zero, when set to ON, when you stop a program.
* The message window will now be showing the setting for English (miles) or Metric (Kilometers) Use the UP/DOWN keys to select and press Enter
* The message window will ask to adjust the wheel size for calibration. Enter 63.
* The display will show a number for the lowest speed setting (for miles the number should be 0.5). Adjust the low speed setting with the UP/DOWN keys and press Enter.
* The display will show a number for the top speed setting (for Miles it should be 12.0).
* The display will ask for top incline setting, enter 15.
* Press Start to begin calibration. This is an automatic process, the belt will move and change speeds without warning. Be Careful. When calibration is done, the console will return to the startup screen

Maintenance Tips

Belt and Deck - Your treadmill uses a very high-efficient low-friction deck. Performance is maximized when the deck is kept as clean as possible. Use a soft, damp cloth or paper towel to wipe the edge of the belt and the area between the belt edge and frame. Also reach as far as practical directly under the belt edge. This should be done once every other month to extend belt and deck life. Use water only - no cleaners or abrasives. A mild soap and water solution along with a nylon scrub brush will clean the top of the textured belt.
Belt Dust - This occurs during normal break-in or until the belt stabilizes. Wiping excess off with a damp cloth will minimize buildup.
General Cleaning - Dirt, dust, and pet hair can block air inlets and accumulate on the running belt. On a monthly basis: vacuum underneath your treadmill to prevent buildup. Every other month, you should remove the black motor hood and carefully vacuum out dirt that may accumulate. UNPLUG POWER CORD BEFORE THIS TASK. There is a maintenance schedule/chart included under the Table of Contents for convenient record keeping.

Running Belt Adjustments

Tread-belt Tension Adjustment - Belt tension is not critical for most users. It is very important though for joggers and runners in order to provide a smooth, steady running surface. Adjustment must be made from the rear roller with the 6mm Allen wrench provided in the parts package. The adjustment bolts are located at the end of the step rails as shown in the diagram below. Tighten the rear roller only enough to prevent slippage at the front roller. Turn the tread-belt tension adjusting bolts 1/4 turn each and inspect for proper tension by walking on the belt and making sure it is not slipping or hesitating with each step. When an adjustment is made to the belt tension, you must be sure to turn the bolts on both sides evenly or the belt could start tracking to one side instead of running in the middle of the deck.

DO NOT OVERTIGHTEN – Over tightening will cause belt damage and premature bearing failure. If you tighten the belt a lot and it still slips, the problem could actually be the drive belt - located under the motor cover - that connects the motor to the front roller. If that belt is loose it feels similar to the walking belt being loose. Tightening the motor belt should be done by a trained service person.

Running belt Tracking Adjustment

The treadmill is designed so that the tread-belt remains reasonably centered while in use. It is normal for some belts to drift near one side while in use, depending on a user’s gait and if they favor one leg. But if during use the belt continues to move toward one side, adjustments are necessary.
SETTING TREAD-BELT TRACKING
An 6mm Allen wrench is provided for this adjustment. Make tracking adjustments on the left side bolt. Set belt speed at 3 mph. Be aware that a small adjustment can make a dramatic difference which may not be apparent right away. If the belt is too close to the left side, then turn the bolt only a 1/4 turn to the right (clockwise) and wait a few minutes for the belt to adjust itself. Continue to make 1/4 turns until the belt stabilizes in the center of the running deck.

If the belt is too close to the right side, turn the bolt counter-clockwise. The belt may require periodic tracking adjustment depending on use and walking/running characteristics. Some users may affect tracking differently. Expect to make adjustments as required to center the tread-belt. Adjustments will become less of a maintenance concern as the belt is used. Proper belt tracking is an owner responsibility common with all treadmills.
Running belt and Deck Lubrication Procedure

First, you want to clean between the belt and deck to remove any debris that may be trapped. Use a clean, non-fraying rag, t-shirt, or light towel. Halfway between the end of the treadmill and motor cover, shove the garment under the belt until you can grasp it on both sides of the belt. Drag the garment the length of the entire belt 1-2 times. Remove the garment.

Keeping the deck lubricated at the recommended intervals ensures the longest life possible for your treadmill. If the lubricant dries out, the friction between the belt and deck rises and places undue stress on the drive motor, drive belt and electronic motor control board, which could result in failure of these components.

The belt & deck come pre-lubricated and subsequent lubrication should be performed every 90 hours of use or if you notice that the deck is dry. It is recommended that you reach between the belt and deck to verify there is lubrication present, every other month. If you check and there isn’t any lubrication present, follow the procedure below even though the “Lube” indicator isn’t lit on the console. Otherwise, lubricate when the console’s lubrication reminder lights after 90 hours of use. Use the following procedure to apply the silicone lubricant:

1. Turn the power switch off and unplug the power cord from the wall outlet
2. Measure 18” from the edge of the motor cover; kneel down and reach under the belt approximately 4- 6” from one edge. Squirt a line of lubricant about 1/8” wide x 15” long in an “S” pattern perpendicular to the motor cover.
3. Repeat the process on the opposite side.
4. Plug the electrical cord back into the outlet and turn the power switch on.
5. Walk on the belt at a moderate speed for five minutes to evenly distribute the silicone lube.
6. Note: If the “Lube” message appears on the console, perform the following procedure to reset the message:
1. To enter the Engineering Mode Menu press and hold down the Start, Stop and Enter keys, then at the same time insert the safety key. Keep holding the keys down until the Display displays Engineering Mode Menu. Press the Enter key to access.
2. Press the Speed UP key (or Speed DOWN key to go backwards) until “Functions” appears; press Enter
3. Press the Speed UP key until “Reset Lube” message appears; press Enter
4. Press Stop to exit Engineering mode and resume use of your treadmill.

Error Messages
LS: The treadmill hasn’t received a speed signal for 8 seconds.
E1: Console memory malfunction or CPU problem.
E2: Incline position error.

Dexter WCAD-Series Vended Washers - Dexter Speed Queen Maxi Load T 600 - Troubleshooting – Error codes

Dexter WCAD-Series Vended Washers - Dexter Speed Queen Maxi Load T 600 - Troubleshooting – Error code causes and solutions 

Dexter Speed Queen Maxi Load T 600;TROUBLESHOOTING 

Machine does not start
Power Supply

Check these areas: Circuit breakers, Voltage, Power leads, Power connections. Is front display LED showing a dollar amount.
Door Switch

Check for continuity through door switch when door is closed. If no continuity, adjust or replace door switch.

Control Breaker or Fuse
Check 1.5 amp (T-1200. uses 2.5amp) breaker or fuse for continuity. If no continuity, replace breaker or fuse.
Control Transformer
Check voltage output from control transformer for 120VAC. If voltage is incorrect, replace transformer.
Coin Acceptor

Check coin switch to make sure coins trip switch and give continuity across switch when closed. If no continuity, adjust or replace switch.
Check PCB board

Check all wire connections for sure contacts.
Check wiring between PCB
Check data cable phone type connectors unplug and VFD and replug with power removed.
Check Relay PCB

Check all wire connections for sure contact.
Check Door Solenoid
Check that 120 v power is at solenoid after start button is pushed.

Machine will not accept and count coins
Coin Acceptor

Check coin acceptor switch for any type of blockage or damage. Clean, adjust or replace the acceptor.

Power Supply

Check these areas: Circuit breakers, Voltage, Power leads, Power connection
Door Closed Safety Switch
Check door closed switch at door hinge for proper operation.
Door Handle Closed Switch
Check single door closed switch at left side of door handle to close when handle is vertical.
Control Breaker or fuse
Check 1.5 amp (T-1200 uses 2.5 amp) breaker or fuse for continuity. If no continuity, replace breaker.
Main PCB; Replace

No hot water in detergent dispenser
Water Valve Coil

Check coil continuity at terminals and replace if no continuity. 120 V power only on for 20 second in wash bath.
Water Inlet

Check water inlet screens for blockage and clean screens if necessary.
Water

Check to insure that water is turned on and operating.
P-20

Wire Harness Check black & white harness.

Hot water does not enter tub in wash
Water Valve Coil

Check coil continuity at terminals and replace if no continuity. Check for 120 V power from main relay PCB
Water Inlet

Check water inlet screens for blockage and clean if necessary.
Water

Check to insure that water is turned on and operating.
Blk or Wht wire at main controller
Check black or white wires at Molex plug on PCB at main controller and at relay PCB.
Pressure Switch

Check pressure switch continuity between terminals . If no continuity, check pressure switch hose for obstruction. If hose okay, change pressure switch.

ERROR CODE CAUSES AND SOLUTION 

ERROR CODE F1

The door failed to close and lock or The door failed to remain locked during the cycle.
Check VFD fault code before turning off. Check to hear if door solonoid engaged. Turn off the power to the washer. Check wire connections to door /lock switches. Check wire connections from switches to controller. Check P-4 wire connections at PCB controller. Adjust the door lock mechanism.

ERROR CODE F2

The washer tub does not fill with water within 7 minutes. The wash cycle will continue. The F 2 will flash three times, then wait for 30 seconds. The error will clear
at the end of the cycle. Turn off the power to the washer. Check the operation of the water valves. Check the incoming water pressure. Check for blocked or restricted water flow.
Check to ensure the drain valve is functioning properly. This error will occur on 18# washers when water level is set for high (the pressure switch in 18# washer is only one level).
ERROR CODE F3

Memory error in controller. The memory checksum is wrong.
Check VFD fault code before turning off power. Try to clear the fault with the Palm. Try a soft Reset of the controller with the white button. If problem. Replace PCB controller.
ERROR CODE F4

Washer controller communication error
Check VFD fault code before turning off power. Try the data cable fi rst. Move around cable and remove any side loading tension from data cable connector ends. Check connection P25/24/23 to P15. Turn power back on to the washer. If the problem returns, replace the PCB washer controller.
ERROR CODE F5

Pressure Switch error (only OPL) - when the high level sensor indicates full but the lower one indicates empty.

The wash cycle will continue. The F 5 will fl ash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check the pressure switch.(Ohm out contacts). Check pressure switch connections to ensure they are all making good contact. Check the Molex type harness connector to ensure no wire been pushed out of the Molex type housing that it is shorting or not connecting.
ERROR CODE F6

Wrong washer size for drive type.
Check VFD fault code before turning off power. If the controller was installed in a different size machine before being installed in this machine, a problem can occur. If someone has been doing repairs on the washer, check for the correct size drive. It can also be caused by pressure switch harness. Check to ensure the correct harness in installed. The control can be reset by holding program button on controller during startup (soft reset). Check orange wire at Molex connector on controller coming from pressure switch or replace pressure switch harness.

ERROR CODE F7

Wrong size drive installed Check VFD fault code before turning off power.Check to ensure all the harnesses are properly connected to the controller. Check to ensure the VFD drive horsepower is proper for this size of washer. The control can be reset by holding program button on controller during startup (soft reset) Check orange wires at molex connector on controller coming from pressure switch.
ERROR CODE F8

The washer tub does not empty within 7 minutes. The wash cycle will continue. The F 8 will flash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check to ensure the drain valve is operating properly (slow drain has potential to cause this code). Check to ensure the pressure switch tube is clear of any blockage, and the pressure switch is operating properly. Check the pressure switch harness.
ERROR CODE F9

The washer tub does not reach the spin target frequency within 150 seconds. The wash cycle will continue. The F9 will fl ash three times, then wait for 30 seconds. The error will clear at the end of the cycle.
Check VFD fault code before turning off power. Check to ensure the drain valve is operating properly (slow drain has potential to cause this code). Check to ensure the pressure switch tube is clear of any blockage, and the pressure switch is operating properly. Check the pressure switch harness.
ERROR CODE F10

After a spin the washer tub does not stop within 150 seconds. Check VFD fault code before turning off power. Inspect the braking resistors and measure the resistance.
Check connecting wiring from braking resistor to the drive mounted in the top of the washer. Reset the drive and try again. Possibly incorrectly programmed drive.
ERROR CODE F11

The drive size setting has changed.
Check VFD fault code before turning off power. Check to ensure all the harnesses are properly connected to the controller. Check to ensure the drive horsepower is proper for this size of washer. If no one has worked on machine very recently then PCB controller or VFD may need to be replaced. Do a soft reset before and after either VFD replaced.

ERROR CODE F12

Washer controller internal error
Check VFD fault code before turning off power. Turn off the power to the washer. Wait one to two minute. Turn on the power to the washer.

ERROR CODE F13

The variable frequency drive (VFD) and the washer computer are not communicating.
Check the data communication cable between the washer computer and the variable frequency drive (VFD).
Step 1: Make sure the cable did not become unplugged during operation.
Step 2: Make sure that the cable is not being pulled sideways at either the washer controller, or the VFD, plug end. If both ends of the communications cable are plugged in the washer computer and VFD and there is no tension on the communications cable pulling it from side to side, then replace the cable.
Step 3: Inspect both female connection points at PCB controller and at VFD. These may need replacement if they cannot be reset.
ERROR CODE F14

Over-current on the drive or motor.
Step 1: Check to make sure the washer cylinder turns freely by hand. If it turns freely, continue to step 2. If it does not, remove the belt and see if the motor turns freely by hand. If the motor turns freely, then check for obstructions in the cylinder or check the bearings. If the motor does not turn freely, replace the motor.
Step 2: Check the motor wires for a short circuit between leads. If there are motor leads that have conductors touching, separate them and insulate them. If the wires are broken, splice them together or replace the motor.
Step 3: Check braking resistors to see if they measure the correct resistance. If a resistor does not measure the proper value, replace it.
ERROR CODE F15

The variable frequency drive (VFD) senses that the internal voltage is too high. The source of the problem can originate from two different areas.

Area 1: The input voltage can be too high, or there may be a high level of electrical noise.
Area 2: The motor can be generating a voltage that is acting like an input to the VFD output motor terminals.
Step 1: Measure the supply voltage to the VFD on the L1, L2 (or N), and L3 (if connected to three phrase power). the supply voltage should be from 187 to 264 VAC or 108 to 132 VAC for a 120 VAC VFD. Also make sure the supply wires on L1, L2 (or N) and L3 (if connected to three phase power are securely connected.
Step 2: Ch eck the braking resistor connections at the VFD. The terminal screws should be tight. Once of the braking resistor wires should be connected to terminal B2.
Step 3: Measure each braking resistor separately to make sure they are the correct resistance. (200 for 1 and 2 Hp VFD and 160 for 3 Hp VFD).
Step 4: If you have a 240 VAC, high leg voltage supply, try disconnecting the high leg. If this cures the problem, either leave the high leg disconnected, connect a transient voltage surge suppressor (with some form of filtering) at the voltage supply panel, connect a line choke on the high leg or install a VFD filter.

ERROR CODE F16

The temperature sensor inside of the variable frequency drive detects that the internal temperature is too high.
Step 1: Make sure the cooling fi ns on the VFD heatsink and the ventilation louvers on the VFD cooling fan cover are clean.

Step 2: Start a washer cycle and make sure the VFD cooling fan operates after the cylinder starts turning.
ERROR CODE F17

Overload of the drive or motor (Check drive fault code before powering down). Check the washer motor to ensure it turns freely. Check the wiring for loose connections to the drive and motor. Measure the braking resistor values. Check for damaged motor wires. Check V-Belt tension and adjust to 1” deflection at center. Check braking resistors.
ERROR CODE F18

Ground Fault to the drive Check VFD fault code before turning off power. Check the wiring connections to the drive and motor. Check the ground wiring of the drive, motor and incoming connection to ensure a proper ground is present. Check for damaged motor wires.
ERROR CODE F19

Low Voltage to the drive Check VFD fault code before turning off power. Turn the power off to the washer. Check the wiring connections to the drive and motor. If no problem is observed, turn on power to the washer and test.Measure the incoming line voltage.
ERROR CODE F20

Internal drive error Check VFD fault code before turning off power. Turn the power off to the washer. Wait one minute. Turn the power on to the washer. If problem reappears, contact your Dexter representative.
ERROR CODE F21

Data error on communications between the controller and drive Internal drive error # 32. This error also has CEXX errors associated with it that are presented on the drive display.
The CE errors are communications errors. Data Cable noise can cause the majority of these errors.Check VFD fault code before turning off power. Check the data cable between the controller and the drive. Replace data cable if it appears damaged and fault appears again. Please note that this fault will occur if you turned main power off and on too quickly.