Panasonic DMC-LC1PP / DMC-LC1EB / DMC-LC1EG / DMC-LC1GC / DMC-LC1GD / DMC-LC1GN (serv.man2) Service Manual ▷ View online
8 CSP REPAIR PROCEDURE
This model is using the CSP.
When repair the CSP, it performes in the following equipment and procedure.
When repair the CSP, setup of temperature and time is important. Be careful to setting temperature and time, it may change with
models.
models.
8.1. TOOLS TO BE USED
Name
Part No.
Usage
Manufacture
SPOT HEATER
HS-557
For reflow from above
HOZAN
BOARD WARMER
HV-500
For reflow from below
HOZAN
PCB SUPPORT PLATE
Accessory of HV-500
For holding PCB
HOZAN
BLOWER HOLDER
HS-505
For holding blower
HOZAN
NOZZLE
HS-572
For CSP reflow
HOZAN
BACUUM PIC
P-835
For CSP removal
HOZAN
FLUX WITH BRUSH
H-721
-----
HOZAN
DIGITAL THERMOMETER
DT-510
For measuring temperature
HOZAN
SENSOR PROBE
DT-510A
Connected to DT-500
HOZAN
ALCOHOL/THREAD SOLDER/SOLDERING IRON
-----
-----
This model uses lead free solder (PbF).
8.2. PART NAMES OF SPOT HEATER AND BOARD WARMER
SPOT HEATER
Temperature
control VR
control VR
Blower
Nozzle
PCB holder
PCB support plate
Stay
(Holder position
adjustment knob)
(Holder position
adjustment knob)
Blower holder
Power supply
BOARD WARMER & PCB HOLDER
8.3. PREPARATION
For hot air blowout time, refer to the following table.
Removal
Installation
Preheat
Heat
Preheat
Heat
90 seconds
60 seconds
90 seconds
60 seconds
The temperatures are measured with DT-510 and DT-510A at a room temperature of approx. 20°C for reference.
Reflow tools
Preparation of tools
Setting conditions
Preheat
HEAT level
AIR level
SPOT HEATER
Install a nozzle to the blower
240°C
MIN
Turn on the power after presetting the
temperature and air flow.
Wait for at least 5 minutes to stabilize the hot
air temperature.
NOTE:
Open the board warmer shutter beforehand.
Set the board warmer hood at the lowest
position.
temperature and air flow.
Wait for at least 5 minutes to stabilize the hot
air temperature.
NOTE:
Open the board warmer shutter beforehand.
Set the board warmer hood at the lowest
position.
BOARD WARMER
Install the blower to the blower holder
210°C
----
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DMC-LC1PP / DMC-LC1EB / DMC-LC1EG / DMC-LC1GC / DMC-LC1GD / DMC-LC1GN
8.4. CSP REMOVAL PROCEDURE
CPU removal complete
CSP
SPOT HEATER
BOARD WAMER
Both of tools are turned on.
Wait for at least 5 minutes to stabilize the hot air temperature.
Leave the board warmer shutter open.
Moving the PCB support plate, and then align the CSP
of the repair board over the reflow hole.
of the repair board over the reflow hole.
Wait for approx. 90 seconds to preheat the PCB.
Adjust the blower using the knobs of the stay so that the tip of the blower nozzle, fixed to the blower holder,
moves as close as possible to the CSP surface. (less than 0.5 mm)
moves as close as possible to the CSP surface. (less than 0.5 mm)
NOTE: Be careful not to touch the PCB surface or adjacent parts.
Heat for approx.
60 seconds.
60 seconds.
Solder
melts.
melts.
Move the nozzle tip
as close as possible
to the CSP surface.
as close as possible
to the CSP surface.
PCB
NOTE: Pay attention to the hot air
blown from above and below.
blown from above and below.
Blower
Nozzle for CSP
Shutter
PCB holder or
support plate
support plate
Moving the CSP nozzle, draw up the CSP by
suction with the Vacuum PIC.
suction with the Vacuum PIC.
Change the size of the pat on the Vacuum
PIC tip according to the IC.
PIC tip according to the IC.
Pad size of vacuum PIC
L size
M size
S size
NOTE: 1. Be careful of the CSP is hotted.
2. Do not use ordinary tweezers.
Remove the PCB from the plate in applox. 30 seconds
after closing the Board Warmer shutter.
30 seconds ----- A standard time necessary for the solder
becomes solid on the board.
after closing the Board Warmer shutter.
30 seconds ----- A standard time necessary for the solder
becomes solid on the board.
After removing the PCB, open the Board Warmer shutter.
CSP removal complete
Do not reuse of the removed CSP
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DMC-LC1PP / DMC-LC1EB / DMC-LC1EG / DMC-LC1GC / DMC-LC1GD / DMC-LC1GN
8.5. CSP ASSEMBLY PROCEDURE
Step 1.
Cleaning of the PCB (at CSP installation area)
Remove the PCB from BOARD WARMER
NOTE: Caution of hot wind from the reflow hole.
Removal of the solder of CSP installation area
Flat the solder on the electrode land using the solder of CSP
installation area on C.B.A. by the soldering iron.
--- (the tip temperature is 380 )
Slide soldering iron on the surface of the remaining solder with
gentle stroke.
installation area on C.B.A. by the soldering iron.
--- (the tip temperature is 380 )
Slide soldering iron on the surface of the remaining solder with
gentle stroke.
Perform soldering without making a string and uneven solder.
(Visually check for remaining solder using a magnifire)
(Visually check for remaining solder using a magnifire)
Rainforced
land
land
Be careful not to produce soldering defects
such as whisker or soldering inconsistency
on the electrode lands.
such as whisker or soldering inconsistency
on the electrode lands.
PCB
NOTE: Do not use the desolder braid.
It causes to remove the electrode land
copper foil.
copper foil.
< Installation area figure. A >
Electrode
land
land
Rainforced land
Alignment mark
(on the PCB)
(on the PCB)
Reference: Some types of CSPs have reinforced
lands and others not.
Clean the CSP installation area
Wipe out the flux from the board surface using alcohol or others.
(*1: HOZAN Z-293, Code No. 92923 Flux remover)
Apply the flux at the CSP installation area ----- Using flux with brush
Apply the flux lightly with a brush.
Place a new CSP on the PCB and align it
It is recommended to use a magnifier. (HOZAN L-55 + L-65 etc.)
Align the CSP with the alignment marks on the board. (Refer to "Installation area figure. A")
POINT: When viewed from above, the alignment marks should be visible along the CSP on the PCB.
POINT: When viewed from above, the alignment marks should be visible along the CSP on the PCB.
After the CSP has been aligned, move the PCB to the SPOT HEATER / BOARD WARMER.
Be careful not to vibrate the PCB while moving it.
After moving the PCB, check if the CSP does not deviate from the installation position using a magnifier
or something.
Be careful not to vibrate the PCB while moving it.
After moving the PCB, check if the CSP does not deviate from the installation position using a magnifier
or something.
Apply the flux lightly.
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DMC-LC1PP / DMC-LC1EB / DMC-LC1EG / DMC-LC1GC / DMC-LC1GD / DMC-LC1GN
Step 2.
Install of the CSP
SPOT HEATER
BOARD WAMER
Set the PCB to BOARD WARMER
The CSP has been aligned on the PCB.
Moving the PCB support plate, and then align the CSP
repair area over the reflow hole.
repair area over the reflow hole.
NOTE: Pay attention to the hot air.
Preheat the PCB (at the CSP installation area) for applox.
90 seconds.
90 seconds.
CSP
PCB
Blower
Nozzle
Move the nozzle tip
as close as possible
to the CSP surface.
as close as possible
to the CSP surface.
Shutter
PCB holder or
support plate
support plate
CAUTION: Be careful not to suffer a burn with the hot air from
above and below.
above and below.
Set the nozzle at the
same position as set
when the CSP was
removed.
same position as set
when the CSP was
removed.
The nozzle position was
adjusted when the CSP
was removed.
adjusted when the CSP
was removed.
*
Heat the PCB approx. 60 seconds.
Solder melts
When the solder melts, the CSP
slightly moves or sinks due to a
self alignment effect to correct
subtle deviation.
slightly moves or sinks due to a
self alignment effect to correct
subtle deviation.
*
Remove the PCB from the plate in applox. 30 seconds
after closing the board wamer shutter.
applox. 30 seconds
----- A standard time necessary for the solder to become
solid on the PCB (cooling the PCB)
after closing the board wamer shutter.
applox. 30 seconds
----- A standard time necessary for the solder to become
solid on the PCB (cooling the PCB)
CSP install (repair) complete. Confirm for deviation from the alignment
marks again.
marks again.
This completes the repair of CSP. To check if the repair is successful or not, operate the
circuit or perform some procedures such as the circuit checking procedure.
circuit or perform some procedures such as the circuit checking procedure.
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DMC-LC1PP / DMC-LC1EB / DMC-LC1EG / DMC-LC1GC / DMC-LC1GD / DMC-LC1GN
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