DOWNLOAD Sony DSC-W90 (serv.man2) Service Manual ↓ Size: 2.72 MB | Pages: 57 in PDF or view online for FREE

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1.

Check the area of your repair for unsoldered or poorly-soldered
connections.  Check the entire board surface for solder splashes
and bridges.

2.

Check the interboard wiring to ensure that no wires are
"pinched" or contact high-wattage resistors.

3.

Look for unauthorized replacement parts, particularly
transistors, that were installed during a previous repair.  Point
them out to the customer and recommend their replacement.

4.

Look for parts which, through functioning, show obvious signs
of deterioration.  Point them out to the customer and
recommend their replacement.

5.

Check the B+ voltage to see it is at the values specified.

6.

FLEXIBLE Circuit Board Repairing

• Keep the temperature of the soldering iron around 270°C

during repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40°C higher than

ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350

°C.

Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscous (sticky, less prone to flow) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.

After correcting the original service problem, perform the following

safety checks before releasing the set to the customer.

CAUTION

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

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C

Repaired by:

Refer to “1-2-3. Self-diagnosis Code Table”.

Indicates the appropriate
step to be taken.
E.g.
13 ....Format the “Memory Stick Duo”.
32 ....Turn on power again.

Block

Detailed Code

Blinks at 3.2 Hz

C : Corrected by customer
E : Corrected by service

engineer

LCD screen

When you replace to the repairing board, the written destination data of repairing board also might be changed to original setting.
Refer to Service Manual ADJ, and perform “DESTINATION DATA WRITE”.

The set is shipped with a unique ID (USB Serial No.) written in it.
This ID has not been written in a new board for service, and therefore it must be entered after the board replacement.
Refer to Service Manual ADJ, and perform “USB SERIAL No. INPUT”.

When problems occur while the unit is operating, the self-diagnosis
function starts working, and displays on the LCD screen what to
do.
Details of the self-diagnosis functions are provided in the Instruction
manual.

When problems occur while the unit is operating, the LCD screen
shows a 4-digit display consisting of an alphabet and numbers, which
blinks at 3.2 Hz. This 5-character display indicates the “repaired
by:”, “block” in which the problem occurred, and “detailed code”
of the problem.

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C

C

E

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E

Block

Function

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3

3

2

6

1

6

1

6

2

6

2

6

2

6

2

6

2

9

1

9

2

Detailed

Code

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Symptom/State

The internal memory has experienced a
format error.

“Memory Stick Duo” is unformatted.

“Memory Stick Duo” is broken.

“Memory Stick Duo” type error

The camera cannot read or write data
on the “Memory Stick Duo”.

Trouble with hardware

Difficult to adjust focus
(Cannot initialize focus)

Zoom operations fault
(Cannot initialize zoom lens.)

Abnormality of IC for steadyshot.

Lens initializing failure.

Lens overheating (PITCH).

Lens overheating (YAW).

Abnormality of thermistor.

Abnormality when flash is being charged.

Non-standard battery is used.

Self-diagnosis Code

Repaired b

y:

Correction

Format the internal memory.

Format the “Memory Stick Duo”.

Insert a new “Memory Stick Duo”.

Insert a supported “Memory Stick Duo”.

Turn the power off and on again, or taking out and inserting the
“Memory Stick Duo” several times.

Turn the power off and on again.

Retry turn the power on by the power switch. If it does not
recover, check the focus reset sensor of lens block (pin ws of
CN402 on the SY-169 board). If it is OK, check the focus motor
drive IC (IC401 on the SY-169 board).

Retry turn the power on by the power switch. Check the zoom
reset sensor of lens block (pin ra of CN402 on the SY-169
board) when zooming is performed when the zoom button is
operated. If it is OK, check the zoom motor drive IC (IC401 on
the SY-169 board).

Check or replacement of the IC for steadyshot (IC503 on the SY-
169 board).

Check or replacement of the IC for steadyshot (IC503 on the SY-
169 board).

Check the HALL element (PITCH) of optical image stabilizer
(pin 5, 6 of CN402 on the SY-169 board). If it is OK, check
PITCH angular velocity sensor (SE502 on the SY-169 board)
peripheral circuits.

Check the HALL element (YAW) of optical image stabilizer (pin
ql

, w; of CN402 on the SY-169 board). If it is OK, check YAW

angular velocity sensor (SE501 on the SY-169 board) peripheral
circuits.

Check the OIS temp sensor of optical image stabilizer (pin 4 of
CN402 on the SY-169 board).

Checking of flash unit or replacement of flash unit. (Note)

Use the compatible battery only.

After repair, be sure to perform “1-3. PROCESS AFTER FIXING FLASH ERROR”.

When “FLASH error”  (Self-diagnosis Code  E : 91 : 01) occurs, to prevent any abnormal situation caused by high voltage, setting of the flash
is changed automatically to disabling charge and flash setting.
After fixing, this setting needs to be deactivated. Flash error code can be initialized by the operations on the HOME screen.

Initializes the setting to the default setting. Even if you execute this function, the images 
stored in the internal memory are retained.

1

Select [Initialize] with v/V/b/B, then press z.
The message “Initialize all settings” appears.

2

Select [OK] with v, then press z.
The settings are reset to the default setting.

Select [Cancel] in step 2, then press z.

• Make sure that the power is not disconnected during resetting.

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The data can be copied/erased by the operations on the HOME screen. (When erasing the data, execute formatting the internal memory.)

When replacing the SY-169 board, erase the data in internal memory of the board before replacement.

When replacing the SY-169 board, execute formatting and initialize the internal memory after replacement.

Copies all images in the internal memory to a “Memory Stick Duo”.

1

Insert a “Memory Stick Duo” having 32 MB or larger capacity.

2

Select [Copy] with v/V/b/B on the control button, then press z.
The message “All data in internal memory will be copied” appears.

3

Select [OK] with v, then press z.
Copying starts. 

Select [Cancel] in step 3, then press z.

• Use a fully charged battery pack. If you attempt to copy image files using a battery pack with little 

remaining charge, the battery pack may run out, causing copying to fail or possibly corrupting the data.

• You cannot copy individual images.

• The original images in the internal memory are retained even after copying. To delete the contents of the 

internal memory, remove the “Memory Stick Duo” after copying, then execute the [Format] command in 
[Internal Memory Tool].

• When you copy the data in the internal memory to the “Memory Stick Duo”, all the data will be copied. 

You cannot choose a specific folder on the “Memory Stick Duo” as the destination for the data to be 
copied.

• Even if you copy data, a 

 (Print order) mark is not copied

.

This item does not appear when a “Memory Stick Duo” is inserted in the camera.

Formats the internal memory.

• Note that formatting irrevocably erases all data in the internal memory, including even protected images.

1

Select [Format] with v/V/b/B on the control button, then press z.
The message “All data in internal memory will be erased” appears.

2

Select [OK] with v, then press z.
The format is completed.

Select [Cancel] in step 2, then press z.