COMPUTER HARD DISKS SWITCH CIRCUIT SCHEMATIC DIAGRAM

 

In these times with viruses and other threats from the Internet it would be nice to have reassurance that the PC cannot be infected. That is why this circuit was designed. It makes it possible to install multiple hard disks inside the case of a PC, which are separated in such a way that viruses cannot move from one disk to another. In this case there are three drives installed, one for use of the Internet via ADSL, one for working with email and one for other applications.

If data from the Internet never arrives on the third disk, it is effectively protected against viruses. The solution outlined here has been in satisfactory use for a couple of years. There is an additional benefit: if there are ever any problems with the operation of the computer, then it is very easy to change to another hard disk to check if the problem manifests itself there as well. In this case, fault finding can be made much easier. The circuit operates by only switching over the power supply voltages (5 V and 12 V) of the hard disks. The hard disk is out of service without a power supply. This works without a problem with S-ATA disks.

Circuit diagram:

Hard Disk Switch Circuit Diagram

With IDE disks this only works with modern drives. There may only be a combination of hard disks on the relevant port and no CD-ROM, DVD-drive, CD-burner or something similar. The selection of the desired hard disk is done with a rotary switch. This has to be set to the correct position before the computer is switched on. When the power supply is turned on, one of three relays is driven via diode D1, D2 or D3. The relays are provided with a hold circuit via a second diode (D4, D5 and D6). In this way the selected relay remains energised as long as the power supply voltage is present.

After switching on, electrolytic capacitor C1 is charged via R1, so that the common contact of the rotary switch is quickly at 0 V. This prevents an accidental change of hard disk while the computer is in operation. The ADSL modem is powered from the PC. This power supply voltage is only present if hard disk number 2 is selected. This prevents the use of the Internet if one of the other disks is selected.

Author: Uwe Kardel - Copyright: Elektor Electronics Magazine

WESTERN DIGITAL MY BOOK – EXTERNAL HARD DRIVE – DISASSEMBLING PROCEDURE – HOW TO REPLACE THE MINI USB PORT

Western Digital My Book – External Hard Drive – Disassembling procedure – How to replace the mini USB Port

Western Digital My Book

Turn the drive to its backside.

With the plastic opening tool, fit the pry along the edges of the case.

When you hear the case snap-out of its fitted grooves, go ahead slowly slide the board assembly out of the case.

Gently pull the three pronged, clear plastic piece from the inserted rubber holder.

Unscrew the 2 screws from the motherboard.

Remove all the rubber pieces from the four corners to unhinge the motherboard.

Safely remove the motherboard. Set aside in a safe static-free location.

Grab the mini USB and align it with the appropriate metal docks on the motherboard.

Soldering Iron is extremely hot.

Please do not touch the iron tip.
Start heating up the Soldering Iron, may take about 10–15 mins.

APPLE IPOD CLASSIC HOW TO REPLACE THE HARD DRIVE - HDD

How to replace the hard drive - HDD – Apple iPod Classic

Apple iPod Classic: DISASSEMBLING PROCEDURE 

Apple designed their iPods to be very difficult to take apart without destroying major components. Because of the metal face plate, the metal backing, and the 13 metal clips holding the case together, this is one of the toughest Pods to disassemble. Proceed with caution and the warning that you may significantly damage your iPod beyond its present condition. Also, you may want a few extra pairs of plastic
opening tools during installation, as they are easy to ruin when opening the iPod. Have fun! Before opening your iPod, ensure that the hold switch is in the locked position.

Opening this iPod is challenging. Don't get discouraged if it takes you a few tries before the iPod is opened. One thing to notice is the angle of the plastic opening tool's tip while inserting it into the iPod. Ideally, the angle should be as vertical as possible while still clearing the edge of the rear panel. Insert a plastic opening tool into the seam between the front and back of the iPod.

Insert another plastic opening tool into the seam between the front and back of the iPod, leaving at least 1.5 inches of space between the two tools.

At an angle, carefully insert a putty knife about 1/8 inch into the seam between the two opening tools. There are thin metal rails running along the inside of the rear panel, so take great care when inserting the putty knife.

Once the putty knife has cleared the lip of the rear panel, pivot the putty knife so that it is vertical, and carefully (but firmly) wiggle it straight down into the gap between the opening tools.

Push with your fingers on the rear panel behind the putty knife to minimize bending. Slowly flex the putty knife, as shown in the picture, to ensure that most of the metal tabs on this side of the iPod are disengaged. The theory behind this method is, rather than attempting to not bend the rear panel at all, to bend it in a favorable manner that allows you to easily restore it later. Therefore, any bend in the sides of the rear panel should be drawing the lip of the rear panel away from the iPod, rather than pushing out on the curved surface. This method also disengages as many of the side clips as possible.

Remove the putty knife from the iPod and reinsert it closer to the corner of the iPod, using the same wiggle method as before.

If at all possible, do not bend the corner of the rear panel.

Between the lock slider and headphone jack, insert a plastic opening tool into the seam between the front and back of the iPod. You may find it easier to carefully flex the putty knife downward in order to create more of a gap for the opening tool, but be sure not to bend the corner of the rear panel!

Near the center of the display, carefully insert a metal spudger into the gap created by the plastic opening tool. It is easy to create a noticeable bump in the rear panel here that is difficult to repair. When prying the tab free, try to have the metal spudger pivot on the edge of the rear panel rather than bending the rear panel outward.

Using the metal spudger, disengage the single clip on the top of the iPod.

Near the other top corner, insert an opening tool into the seam between he front and back of the iPod

On the other side, insert an opening tool into the seam between the front and back of the iPod. You may find it easier to angle the opening tool stuck in the top corner in order to create a sufficient gap.

Remove the plastic opening tool from the top corner and insert it into the seam between the front and back of the iPod, leaving at least 1.5 inches of space between the two tools (as done on the other side).At an angle, carefully insert a putty knife about 1/8 inch into the seam between the two opening tools. Again, there are thin metal rails running along the inside of the rear panel, so take great care when inserting the putty knife. Once the putty knife has cleared the lip of the rear panel, angle the putty knife so that it is vertical, and carefully (but firmly) wiggle it straight down into the iPod via the gap between the plastic opening tools. Push with your fingers on the rear panel behind the putty knife to minimize bending. Ever so slightly flex the putty knife to ensure that most of the metal tabs on this side of the iPod are disengaged.

The metal clips near the corners are notorious for tenaciously gripping the front panel. It is necessary to disengage these clips in order to open the iPod. Carefully insert a metal spudger into the area near the stubborn metal clip.

Gently wiggle the metal spudger down so that it is all the way in the rear panel.

Gently begin to disengage the clip from the front panel. It is easy to create a noticeable bump in the rear panel here that is difficult to repair. When prying the tab free, try to have the metal spudger pivot on the edge of the rear panel rather than bending the rear panel outward

Continue to push up on the front panel with the metal spudger until the metal clip releases.

There are two ribbon cables connecting the rear panel to the rest of the iPod. In the following step, be careful not to damage these ribbon cables. Grasp the front panel assembly with one hand and the rear panel with the other. Take a deep breath! Gently (GENTLY) disengage the remaining clips on the rear panel by pulling the tops of the front and rear panels away from each other (think of the bottom of the iPod as a hinge), taking great care not to damage the ribbon cables holding the two halves together.

Use a spudger to slide up the connector holding the orange battery ribbon in place. You only need to lift the locking bar up about 2 mm to free the cable. Slide the orange battery ribbon out of its connector.

Place the rear panel next to the iPod, being careful not to strain the orange headphone jack cable.

Lift the hard drive up with one hand so you can access the headphone jack ribbon beneath.
Use a spudger to flip up the plastic tab holding the headphone jack ribbon in place. The tab will rotate up 90 degrees, releasing the ribbon cable.
Slide the orange headphone jack ribbon out of its connector.
The rear panel is now free from the iPod.

Now to repair the damage caused by liberating the internal parts of the iPod Classic! It is highly likely that at least one of the metal clips in the lower case has been bent upward. These clips must all be pointing downward in order to reinstall the rear panel. Take the broad, flat side of the metal spudger and push the clip down, taking care not to tear the thin metal rail from the rear panel. Be careful not to damage any of the headphone jack parts while shaping these clips!

On a clean, hard surface, lay the rear panel on its side. Carefully but firmly push down on it, rolling the entire lip side back into its proper spot. It may be necessary to do this multiple times in order to achieve optimal straightness on the sides. It is better to have the edges of the case pushed in slightly too far rather than not far enough, because the reseating of the front panel will bend the rear panel into its correct alignment. Now that the rear panel is back to a beautiful condition, you can move on to repairing the iPod.

Rotate the hard drive out of the framework and place it so that the connector is facing up. Use a spudger to flip up the plastic tab holding the orange hard drive ribbon in place. The tab will rotate up 90 degrees, releasing the ribbon cable.

Slide the orange hard drive ribbon cable directly out of its connector. If you are replacing the hard drive in your iPod and it did not come with the rubber mounting brackets and foam padding, transfer these items from your old drive to the replacement drive.

APPLE MACBOOK PRO 15 INCH – HOW TO REPLACE THE HARD DRIVE OF APPLE MACBOOK PRO – HOW TO REMOVE THE BATTERY - HOW TO REMOVE THE HDD – HOW TO INSTALL OS – HOW TO CLONE THE EXISTING HARD DRIVE

Apple MacBook Pro 15 inch – How to replace the Hard drive of Apple MacBook Pro – How to remove the battery - how to remove the HDD – How to install OS – How to Clone the existing hard drive

Apple MacBook Pro 15 inch:  Disassembling Hard drive

Use your fingers to push both battery release tabs away from the battery, and lift the battery out of the computer.

Remove the three identical Phillips screws from the memory door. Make sure to record which sets of screws came from where. This will help when re-assembling.

Lift the memory door up enough to get a grip on it, and slide it toward you, pulling it away from the casing. Remove the two Phillips screws in the battery compartment near the latch.

Remove the following 6 screws: Two 10 mm T6 Torx screws on either side of the RAM slot.

Four 14.5 mm Phillips screws along the hinge.
Remove the four Phillips screws on the port side of the computer.

Rotate the computer 90 degrees and remove the two Phillips screws from the rear of the computer. Rotate the computer 90 degrees again and remove the four Phillips screws from the side of the computer.

Do not yank the upper case off quickly. The case is attached to the logic board via a ribbon cable. Lift up at the rear of the case and work your fingers along the sides, freeing the case as you go. Once you have freed the sides, you may need to rock the case up and down to free the front of the upper case. This stage can be quite tricky. Over the DVD reader are 4 tabs set back which pull out vertically. Note that the two small tongues on the left hand front of the upper case may bend while you remove the upper case. When re-installing, you may need to bend them back to fit in the grooves in the lower case.

Disconnect the trackpad and keyboard ribbon cable from the logic board, removing tape as necessary. Remove the upper case.

Disconnect the orange hard drive ribbon cable from the logic board. Use a spudger to carefully loosen the adhesive securing the sleep light and IR sensor connectors to the top of the hard drive.

Remove the two silver Phillips screws securing the hard drive retaining bracket to the lower case. In some machines these screws may have T6 Torx heads. Slide the Bluetooth board out of its slot next to the hard drive. The Bluetooth board is still connected to the orange hard drive cable, so don't try to remove it entirely from the computer.

Lift the hard drive up with one hand and use your other hand to remove the retaining bracket from the side of the hard drive. Disconnect the orange hard drive cable. After installing the new hard drive, make sure the vent hole (on top) is not covered by the orange ribbon cable.

Remove the two silver T6 Torx screws and black rubber bumpers from the right side of the hard drive. You'll need to transfer these screws and bumpers to your new hard drive if you're changing drives. Remove the two black T6 Torx screws and black rubber bumpers from the left side of the hard drive. You'll need to transfer these screws and bumpers to your new hard drive if you're changing drives.

Install operating system and software from scratch.

Follow these instructions after physically installing your new hard drive.
# Insert an OS X installation disc into your optical drive.
# Start the computer up on the installation disc by holding down the “option” key while the computer boots.
# Select the installation disc from the menu.
# Select your language and wait for the installer to load.
# Select “Disk Utility” from the Utility drop down menu.
# Select your new hard drive from the left column in Disk Utility.
# Click on the “Erase” tab.
# Choose the Volume format (we recommend “Mac OS Extended (Journaled)”).
# Select a name for the drive.
# Click “Erase.”
# After erasing is done, quit Disk Utility.
# You may now continue with the OS X installation process. If the drive doesn’t show up as an available volume to install the OS onto, restarting the computer should fix the problem. 

Clone your existing hard drive
If you’re happy with your existing operating system installation and simply are upgrading your hard drive capacity, you can clone your existing hard drive to your new drive.
To clone a hard drive, you’ll need a way to connect two hard drives to your Mac. You’ll need to make sure you have an ATA enclosure (IF136-005) if you have a PowerBook or iBook, or a SATA enclosure (IF107-055) if you have a MacBook or MacBook Pro. After you’re done cloning the drive, you can put your old drive in the external enclosure and use it as a backup drive. You can also use an external USB or Firewire backup drive to clone your hard drive. However, in this situation you’ll need to first clone your existing drive to the external drive, and then clone the drive back to your new internal drive.

The following instructions assume you’ll be using an external Firewire enclosure for a laptop drive and SuperDuper. If you’re using a different setup, your installation process may be somewhat different.
# Install your new hard drive in the external Firewire enclosure.
# Connect the Firewire enclosure to your Mac.
# Open Disk Utility.
# Select your new hard drive from the left column in Disk Utility.
# Click on the “Erase” tab.
# Choose the Volume format (we recommend “Mac OS Extended (Journaled)”).
# Select a name for the drive.
# Click “Erase.”
# After erasing is done, quit Disk Utility.
# Your new hard drive should now appear on the computer’s desktop.
# Download and install SuperDuper!
# Open SuperDuper.
# Select your current hard drive in the dropdown menu labeled “Copy.”
# Select your new hard drive in the dropdown menu labeled “to.”
# Select “Backup – all files” in the dropdown menu labeled “using.”
# Click “Copy Now.”
# If prompted, provide your password.
# Wait for the drive to copy (this could take several hours if you have a lot on your hard drive already).
# After the copy is complete, quit SuperDuper.
# At this point, your new hard drive should be loaded with your existing software and ready to install; however, we recommend testing the software installation.
1 Restart the computer while holding down the “option” key.
2 Select your new hard drive from the menu.
3 Wait for the computer to boot up, then verify that everything looks right (make sure you’re actually booting up off the new drive).
4 Your new hard drive is now ready to be installed in your computer.
5 Remove your new hard drive from the external enclosure and install it in your computer.

HP PAVILION ZE1000 HOW TO REMOVE KEYBOARD – OPTICAL DRIVE – HARD DISK

HP pavilion ZE1000 HOW TO REMOVE KEYBOARD – OPTICAL DRIVE – HARD DISK

Keyboard_SDRAM_Hard disk drive & Optical drive removal – Hp pavilion ZE1000 series notebook PCs.

To remove the keyboard and optical drive, proceed the following order:

Battery => Lion 8-cell > F3410-60911

Drive, hard disk [20MB, 9.5mm, IBM (Diablo) ATA100  > 0950-4163

SDRAM, 128mb, PC133 SODIMM(x16) > 1818-8504

SDRAM, 256mb, PC133 SODIMM(X16) > 1818-8635

KEYBOARD > F3420-60913

DVD > F3410-60917

DVD,CD-RW > F3410-60919

BATTERY REMOVAL PROCEDURE

Slide the battery’s release latch, and then pull the battery out of its compartment.

HARD DISK DRIVE

Remove both hard drive retaining screws from the bottom of the notebook.  Carefully remove the hard drive from of the notebook.
Remove all four screws from the tray and drive case, and then remove the drive from the tray.

(If you’re installing a new hard disk drive, install the factory software and O/S on the drive before loading any additional software.)

The notebook has no SDRAM built into its motherboard, but has two slots for removable SDRAM modules in a compartment on the bottom of the unit. (One of these slots contains a module installed at the factory). You can use these slots to expand your unit’s RAM. Use HP PC133 SDRAM modules only, or your notebook will not boot up.

Turn off the notebook: click Start, Turn Off Computer, Turn Off.
Unplug the AC adapter (if present) and remove the notebook’s battery.
On the bottom of the notebook, loosen the screw holding the RAM cover (the cover retains the screw), and remove the cover.
Release the two latches at the sides of the SDRAM module by pushing them gently outward  (away from the sides of the module). When you release the latches, the free edge of the module pops up.

KEYBOARD REMOVAL

Unplug the AC adapter, if present, and remove the battery. Use the flat-blade screwdriver to carefully pry up the right end of the keyboard cover, just above the Delete key, then lift the cover off of the notebook.

Insert the tabs on the left end of the cover into the slots in the notebook’s case, and then gently press along the length of the cover to snap it into place.

Remove both retaining screws from the top of the keyboard. Raise the top of the keyboard, then lift the keyboard up and out of the notebook, and lay it face down on the top case, forward of its normal position.

OPTICAL DRIVE REMOVAL

Remove both retaining screws from the back of the optical drive. 5. Carefully slide the optical drive out of the notebook.

APPLE MACBOOK-PRO - HOW TO REMOVE AND REPLACE HARD DRIVE

HOW TO REMOVE AND REPLACE HARD DRIVE TO APPLE MacBook PRO

TOOLS

• #0 Phillips screwdriver (magnetized)
• Torx T6 screwdriver (magnetized)
• Black stick (nylon probe 922-5065) (or other non-conductive nylon or plastic flat-blade tool
• Kapton tape (922-1731 (0.5-inch x 12-yard roll))

PART LOCATION

• Carefully pry up the flex cable from the hard drive.
• Lift up cabling to gain some clearance.

• Remove the two screws from the drive holder.
• Lift the hard drive up slightly to allow it to move right.

• Push the hard drive away from the left side to clear the rubber grommets, then lift up just enough to access its flex connector.
• Carefully push off the flex cable connector to disconnect it from the hard drive.

• Transfer the rubber grommets and screws.

REPLACEMENT

• Make sure that the rubber grommets fit securely into the frame holes.
• Use a black stick to lift the hard drive and guide the rubber grommets securely into the holes in the frame, while holding the bracket in place on the other grommets.

• Use a black stick to guide the hard drive past the blue tooth card.
• Press the flex cable to re-adhere it to the hard drive.

BENQ - S-72 LAPTOP - HOW TO REPLACE RAM MODULE & HARD DISC DRIVE

BENQ - S-72 LAPTOP - HOW TO REPLACE RAM MODULE & HARD DISC DRIVE

RAM MODULE REMOVAL

Remove 2 screws and RAM door can be removed.

Release the RAM catches on both sides. RAM module can be removed.

HDD REMOVAL

Remove 2 screws and HDD door can be removed.

Pull the HDD carefully with black tape.

ACER ASPIRE V3-571 – V3-571G - HOW TO UNLOCK HDD / BIOS PASSWORD

ACER ASPIRE V3-571 – V3-571G - HOW TO UNLOCK HDD / BIOS PASSWORD

TO UNLOCK

• If the HDD password is incorrectly entered three times, the HDD is locked and the Hard disk Security dialog box appears.

Perform the following to unlock the HDD:

• On the Hard disk Security dialog, press Enter to continue. The Select Item dialog box appears.

• Use the ↑ and ↓ keys to highlight Enter Unlock Password and press Enter. The Enter Unlock Password dialog box appears.

• Take note of the generated key code. In Figure example, the key code is 76943488.

NOTE:

• A separate computer is required to generate the unlock password.
• On the separate computer, boot to DOS.
• Execute UnlockHD.exeto generate an unlock password.
• Use the following command: UnlockHD [key code] with the code noted.

• Take note of the generated unlock password.
• On the original device, enter the unlock password in the Enter Unlock Password dialog box.

PHILIPS HDD1420-HDD1620-HDD1630-HDD1635-HDD1830-HDD1835 MICRO AUDIO JUKEBOX FIRMWARE UPDATE PROCEDURE +FIRMWARE AND SOFTWARE UPGRADES

PHILIPS HDD1420-HDD1620-HDD1630-HDD1635-HDD1830-HDD1835 Micro Audio Jukebox Firmware update procedure +Firmware and software upgrades

 1. If you have not already installed the Device Manager download the latest version of the Device Manager from philips.com/support. You may need to enter your language preference and the model number e.g.HDD1630, to access the Device/Firmware Manager upgrade file.

PHILIPS HDD1420-HDD1620-HDD1630-HDD1635-HDD1830-HDD1835

Firmware and software upgrades

1. If you have not already installed the Device Manager download the latest version of the Device Manager from philips.com/support. You may need to enter your language preference and the model number e.g.HDD1630, to access the Device/Firmware Manager upgrade file.
2. Download the zip file into a temp folder in your computer. Unzip the file and then double click the Setup.exe file to start the installation of the Device Manager.
3. Once the installation is complete, connect the GoGear to the power supply with the AC/DC adapter.
4. Make sure all other applications such as Philips Device plug-in, Windows Media Player or Windows Explorer that accessing the device are closed or else Device Manager will not recognize the device. Launch the
Philips Device Manager at Start->Programs- >Philips Device Manager->Philips Device Manager on your PC.
5. Click Update in the dialogue box  the Philips Device Manager will detect the connection of your GoGear and the application will automatically check on the server to see if an update is available and prompt user to download the updated firmware. Click YES to start the downloading

6. A status bar will show the downloading progress of the firmware. Once the downloading is complete the application will prompt you to install the update onto your GoGear. Click YES to confirm

7. The application will show the status of updating and at the end you need to click OK to complete the update.

(Please do not disconnect the jukebox during the upgrading process as this interruption may damage the firmware!)
8. Follow all screen instructions to complete the firmware upgrade.
9. The Device Manager will close automatically once the success message is displayed. Close all opened application and then unplug your GoGear.
10. Once the GoGear micro jukebox is disconnected from the computer, the display will show “Firmware Upgrading” for a couple of seconds and then start up as usual. If the message does not disappear after 2 minutes, do a soft reset by pressing and holding the Power on/off key and the volume + key for a couple of seconds.

Repair the firmware with Device Manager
1. If you have not already installed the Device Manager download the latest version of the Device Manager from http://www.philips.com/support. You may need to enter your language preference and the model number e.g.HDD1630, to access the Device/Firmware Manager upgrade file.
2. Download the zip file into a temp folder in your computer. Unzip the file and then double click the Setup.exe file to start the installation of the Device Manager.
3. Once the installation is complete, connect the GoGear to the power supply with the AC/DC adapter.
4. Make sure all other applications such as Philips Device plug-in, Windows Media Player or Windows Explorer that accessing the device are closed or else Device Manager will not recognize the device. Launch the Philips Device Manager at Start->Programs- >Philips Device Manager->Philips Device Manager on your PC.

5. Click YES to start the downloading. A status bar will show the downloading progress of the firmware. Once the downloading is complete the application will prompt you to install the update onto your GoGear.

6. Once the repair is complete a dialogue box will pop up; click OK and unplug the GoGear from the computer.

IMPORTANT: All music & content of your micro jukebox will be erased once the factory setting is restored.
7. Follow all screen instructions to complete the repair.
8. The Device Manager will close automatically once the success message is displayed. Close all opened application and then unplug your micro jukebox.
9. Once the GoGear micro jukebox is disconnected from the computer, the display will show “Firmware Upgrading” for a couple of seconds and then start up as usual

Re Rebuild database, firmware and Microsoft (Plays For Sure) copy protection key after replacement of hard disk or PCBA

IMPORTANT: All devices having the hard disk or PCBA replaced must have the firmware image, database and the Plays For Sure key rebuilt before returning to customers.

1. Connect the GoGear to the power supply and the computer with the combined charger and USB cable.
2. Reset the device by pressing and holding down the Volume + and the power on/off slider switch until the display turns off.
3. While the device restart, press and hold the volume – key until the Philips splash screen disappear and showing the connection icon to put the device in USB Mass Storage Device mode.

4. The device will be listed as a new drive named GOGEAR or MDJUKEBOX in Windows Explorer.

5. Launch Windows Explorer and then quick format the new drive to the file system FAT32.

IMPORTANT: All music & content of your micro jukebox will be erased once the device is formatted.
6. Unzip and copy all the content of the shipment ui files of the corresponding model version into the root directory of the device. (CD ROM with the Shipment ui files will be provided to repair workshops.)
7. Disconnect the GoGear from the computer by clicking on the safely remove hardware icon on the task tray.
8. Wait until the display shows “Burn success”.
9. Reset the device again by pressing and holding down the Volume + and the power on/off slider switch until the display turns off.
10. Upgrade the firmware of the device to the latest version by following the procedure as mentioned under “Firmware software upgrades”

SONY HDD AUDIO PLAYER SYSTEM - HAP-S1 - SERVICE DIAGNOSTICS TEST MODES – ELECTRICAL ADJUSTMENTS MODES – POWER SUPPLY AND POWER AMPLIFIER SCHEMATIC DIAGRAM – LM3876 – NJW1194 – AUDIO SYSTEM REPAIR AND SERVICE - HIGH RESOLUTION HDD AUDIO PLAYER

SONY HDD AUDIO PLAYER SYSTEM - HAP-S1 - service diagnostics test modes – Electrical adjustments modes – power supply and power amplifier schematic diagram – LM3876 – NJW1194 – Audio system repair and service - High resolution HDD audio player

                                                 Category: Audio System Repair and Service 

Contents of this article 

• Service Diagnostics Test modes 
• Electrical test modes 
• Power amplifier schematic diagram 

SONY HAP-S1

TEST MODE

Entering Method of The Service Diag Mode
Procedure:
1. Connect the power cord to an outlet.
2. After becoming the standby state, while holding down two keys of the [HOME] and [BACK], press two keys in order of the [PLAY] >  [POWER].
3. Enter the service DIAG mode, “Main Menu” is displayed on the liquid crystal display.

Releasing Method of The Service DIAG Mode
# Press the [POWER ] button .
# Select the “QUIT” on the main menu.

Operation of The Service DIAG Mode
Version Info
It can display the version information.
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “Version Info”.
3. Press the [PUSH ENTER] knob to enter the “Version Info” mode.

ID Info
It can display the ID information.
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “ID Info”.
3. Press the [PUSH ENTER] knob to enter the “ID Info” mode.

LED/KEY
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “LED/KEY”.
3. Press the [PUSH ENTER] knob to enter the “LED/KEY” mode.

Power LED Check by MPU
It can check the [POWER] LED.
Procedure:
1. Enter the “ LED/KEY” mode.
2. Rotate the [PUSH ENTER] knob to select the “ Power LED Check by MPU”.
3. Press the [PUSH ENTER] knob to enter the “Power LED Check by MPU” mode.
4. The [POWER] LED continues blinking.
ALL LED Check by uCON
It can check two LEDs of the [POWER] and [DSEE].
Procedure:
1. Enter the “LED/KEY” mode.
2. Rotate the [PUSH ENTER] knob to select the “ALL LED Check by uCON”.
3. Press the [PUSH ENTER] knob to enter the “ ALL LED Check by uCON” mode.
4. Two LEDs of the [POWER] and [DSEE] continues blinking.

KEY Check
It can check the keys and knobs.
Procedure:
1. Enter the “LED/KEY” mode.
2. Rotate the [PUSH ENTER] knob to select the “ KEY Check”.
3. Press the [PUSH ENTER] knob to enter the “KEY Check” mode.

4. Each time a key on the main unit or remote commander is pressed and each time a knob on the main unit is rotated, character on the liquid crystal display corresponding to the keys and knobs turns the white color.

5. When all character on the liquid crystal display corresponding to the keys and knobs turns the white color, following screen is displayed on the liquid crystal display.

LCD/Others
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “ LCD/Others”.
3. Press the [PUSH ENTER] knob to enter the “ LCD/Others” mode.

LCD Color Bar
It can check the liquid crystal display.
Procedure:
1. Enter the “LCD/Others” mode.
2. Rotate the [PUSH ENTER] knob to select the “LCD Color Bar”.
3. Press the [PUSH ENTER] knob to enter the “LCD Color Bar” mode.
4. The color bar is displayed on the liquid crystal display.

LCD Back light Check
It can check the liquid crystal display back light.
Procedure:
1. Enter the “LCD/Others” mode.
2. Rotate the [PUSH ENTER] knob to select the “LCD Back light Check”.
3. Press the [PUSH ENTER] knob to enter the “LCD Back light Check.
4. The back light continues changing on the white screen

RTC Check
It can check the real time clock.
Procedure:
1. Enter the “LCD/Others” mode.
2. Rotate the [PUSH ENTER] knob to select the “RTC Check”.
3. Press the [PUSH ENTER] knob to enter the “RTC Check” mode.
4. The result of real time clock check “OK” or “NG” is displayed on the liquid crystal display.

FAN Control Check
It can change the fan motor speed.
Procedure:
1. Enter the “ LCD/Others” mode.
2. Rotate the [PUSH ENTER] knob to select the “FAN Control Check”.
3. Press the [PUSH ENTER] knob to enter the “FAN Control Check” mode.

4. Rotate the [PUSH ENTER] knob to select the “fan slow” and press the [PUSH ENTER] knob.
5. The fan motor is changed to slow speed.
6. Rotate the [PUSH ENTER] knob to select the “fan mid (HAP-S1 only)” and press the [PUSH ENTER] knob.
7. The fan motor is changed to medium speed.
8. Rotate the [PUSH ENTER] knob to select the “ fan high” and press the [PUSH ENTER] knob.
9. The fan motor is changed to high speed.

HDD
It can display the hard disk drive information.
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “HDD”.
3. Press the [PUSH ENTER] knob to enter the “HDD” mode.
Note 1: When the hard disk drive is damaged, the information (model name, serial number and firmware revision) of hard disk drive is not displayed on the liquid crystal display. In addition, when the cable connected to the hard disk drive is disconnected or broken, the information of hard disk drive is not displayed on the liquid crystal display. When the information of hard disk drive is not displayed, check the cable connected to the hard disk drive. When the cable is broken, replace it and enter the “HDD” mode again.

Note 2: Refer to “HDD CHECK” for the “SMART Short Test (2min)” mode and “SMART Long Test (2-4 hours)” mode.
4. Connect a USB memory (FAT32 formatted) to the USB connector on the main unit.
5. Rotate the [PUSH ENTER] knob to select the “SMART Data Read(Need USB Memory)” and press the [PUSH ENTER] knob.
(When a USB memory is not connected to the USB connector on the main unit, “Failed to save USB memory” is displayed on the liquid crystal display. But the SMART data is displayed on the liquid crystal display).

6. The SMART data is saved as a text file in the USB memory. (The file name is “hap_smart_data_xxxxx_yyyyy.log (xxxxx: hard disk drive model name, yyyyy: hard disk drive serial number))
Note 3: This file uses Linux newline code “LF”. You should use “Internet Explorer” or “text editor” that supports “LF” to open this file.
7. Rotate the [PUSH ENTER] knob to scroll the SMART data on the liquid crystal display, and SMART ID is displayed on the liquid crystal display.

8. Check the SMART raw value SMART IDs is displayed on the liquid crystal display.

9. If at least one of these ID’s SMART raw value is not “0”, SMART data check is NG.
Note 4: When the SMART data check is NG, replace the hard disk drive.

Audio
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “Audio”.
3. Press the [PUSH ENTER] knob to enter the “Audio” mode.

Play Audio Data
It can play back various audio data.
Procedure:
1. Enter the “ Audio” mode.
2. Rotate the [PUSH ENTER] knob to select the “Play Audio Data”.
3. Press the [PUSH ENTER] knob to enter the “Play Audio Data” mode.
(The volume control and muting function is available in this mode)

4. Select the audio data by rotating the [PUSH ENTER] knob and press the [PUSH ENTER] knob.
Note 1: “kHz DSD 0dB” does not play back continuously, and stops once after a few seconds.
Note 2: “1kHz PCM 0dB 32bit/48kHz PCM Direct” and “ 1kHz PCM 0dB 32bit/44.1kHz PCM Direct” cannot use in this unit.
5. The selected audio data is played back.
6. To stop the audio data, rotate the [PUSH ENTER] knob to select the “stop” and press the [PUSH ENTER] knob.
Note 3: When checking for the “OPT” or “COAX” in the “ Select Input” after playing back the “1. kHz DSD 0dB”, play back the “2. 1kHz PCM 0dB 32bit/44.1kHz” once, and then enter the “Select Input” mode.

Select Input
It can select the external audio input terminal.
Procedure:
1. Enter the “Audio” mode.
2. Rotate the [PUSH ENTER] knob to select the “Select Input”.
3. Press the [PUSH ENTER] knob to enter the “Select Input” mode.
(The volume control and muting function is available in this mode)

4. Select the external audio input terminal by rotating the [PUSH ENTER] knob and press the [PUSH ENTER] knob.
5. The audio data that input from selected external audio input terminal is output.
WiFi
Procedure:
1. Set the SSID and KEY of the connecting access point with “SONY_HAP_TEST”.
2. Enter the service DIAG mode.
3. Rotate the [PUSH ENTER] knob to select the “ WiFi”.
4. Press the [PUSH ENTER] knob to enter the “WiFi” mode.

Network/Module Info
It can display the wireless network and module information.
Procedure:
1. Enter the “WiFi” mode.
2. Rotate the [PUSH ENTER] knob to select the “Network/ module Info”.
3. Press the [PUSH ENTER] knob to enter the “Network/module Info” mode.
Ping/RSSI
It can display the results indicating whether or not the gateway responded to the PING and RSSI value.
Note: This mode supports only DHCP.
Procedure:
1. Enter the “WiFi” mode.
2. Rotate the [PUSH ENTER] knob to select the “Ping/RSSI”.
3. Press the [PUSH ENTER] knob to enter the “Ping/RSSI” mode.
4. The results indicating whether or not the gateway responded to the PING and RSSI value is displayed on the liquid crystal display.
(When the gateway does not respond to the PING, “Error!!
Can’t get gateway-ip” is displayed on the liquid crystal display)

Ether
Procedure:
1. Connect the main unit to the router with the network LAN cable.
2. Enter the service DIAG mode.
3. Rotate the [PUSH ENTER] knob to select the “Ether”.
4. Press the [PUSH ENTER] knob to enter the “ Ether” mode.

Network Info
It can display the wired network information.
Procedure:
1. Enter the “Ether” mode.
2. Rotate the [PUSH ENTER] knob to select the “Network Info”.
3. Press the [PUSH ENTER] knob to enter the “Network Info” mode.

Ping
It can display the results indicating whether or not the gateway
responded to the PING.
Note: This mode supports only DHCP.
Procedure:
1. Enter the “Ether” mode.
2. Rotate the [PUSH ENTER] knob to select the “Ping”.
3. Press the [PUSH ENTER] knob to enter the “Ping” mode.
4. The results indicating whether or not the gateway responded to the PING is displayed on the liquid crystal display.
(When the gateway does not respond to the PING, “Error!!
Can’t get gateway-ip” is displayed on the liquid crystal display)

IR Learning
This item cannot use in this unit.
Quit
Rotate the [PUSH ENTER] knob to select the “Quit” and press the [PUSH ENTER] knob, service DIAG mode is released.

ELECTRICAL CHECK

HDD CHECK
It can check the result of hard disk drive test.
Operation of The SMART Long Test
The SMART long test is mode to perform the overall test of hard disk drive.
When checking the hard disk drive, perform the SMART long test.
Procedure:
1. Enter the service DIAG mode.
2. Rotate the [PUSH ENTER] knob to select the “HDD”.
3. Press the [PUSH ENTER] knob to enter the “HDD” mode.

4. Rotate the [PUSH ENTER] knob to select the “SMART Long Test (2-4 hours)”.
5. Press the [PUSH ENTER] knob to enter the “SMART Long Test (2-4 hours)” mode.

6. Press the [PUSH ENTER] knob to abort the SMART long test.

7. When the result of test is OK, following screen is displayed on the liquid crystal display

Operation of The SMART Short Test
The SMART short test is mode to perform the simple test of hard disk drive in a short time.
Procedure:
1. Enter the “HDD” mode.
2. Rotate the [PUSH ENTER] knob to select the “SMART Short Test (2min)”.
3. Press the [PUSH ENTER] knob to enter the “SMART Short Test (2min)” mode.

4. Press the [PUSH ENTER] knob to abort the SMART short test.
5. When the result of test is OK, screen is displayed on the liquid crystal display.

POWER AMPLIFIER SCHEMATIC DIAGRAM 

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