FujiFilm FINEPIX A400 User manual

THE COMPONENTS IDENTIFIED WITH THE MARK “” ON THE SCHEMATIC
DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR SAFETY.
PLEASE REPLACE ONLY WITH THE COMPONENTS SPECIFIED ON THE SCHEMATIC
DIAGRAM AND IN THE PARTS LIST.
IF YOU USE PARTS NOT SPECIFIED, IT MAY RESULT IN A FIRE AND AN
ELECTRICAL SHOCK.
FUJI PHOTO FILM CO., LTD. Ref.No.:ZM00625-104
Printed in Japan 2007.04
DIGITAL CAMERA
FinePix A400
US/CA/EU/EG/EE/AS/CH-Model
SERVICE MANUAL
WARNING
BECAUSE THIS PRODUCTIS RoHS LEAD-FREE COMPLIANT, USE THE DESIG-
NATED AFTER-SELES PARTS AND THE DESIGNATED LEAD-FREE SOLDER WHEN
PERFORMING REPAIRS. (Refer to page 3 to page 5)
CAUTION

2
FinePix A400 Service Manual
7. CAUTION: FOR CONTINUED
PROTECTION AGAINST FIRE
HAZARD, REPLACE ONLY WITH
SAME TYPE 2.5 AMPERES 125V
FUSE.
ATTENTION: AFIN D'ASSURER
UNE PROTECTION
PERMANENTE CONTRE LES
RISQUES D'INCENDIE,
REMPLACER UNIQUEMENT
PAR UN FUSIBLE DE MEME,
TYPE 2.5 AMPERES, 125 VOLTS.
8. WARNING:
TO REDUCE THE ELECTRIC
SHOCK, BE CAREFUL TO
TOUCH THE PARTS.
WARNING!
HIGH VOLTAGE
SAFETY CHECK-OUT
After correcting the original problem, perform the following
safety check before return the product to the customer.
1. Check the area of your repair for unsoldered or poorly
soldered connections. Check the entire board surface
for solder splasher 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, though 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. Make leakage - current measurements to determine
that exposed parts are acceptably insulated from the
supply circuit before returning the product to the
customer.
2.5A 125V
2.5A 125V
RISK OF FIRE-
REPLACE FUSE
AS MARKED

3
FinePix A400 Service Manual
RoHS lead-free compliance
Because this product is RoHS lead-free compliant, use the designated after-sales parts and the designated lead-free solder
when performing repairs.
<Background & Overview>
With the exception of parts and materials expressly excluded from the RoHS directive (*1), all the internal connections and
component parts and materials used in this product are lead-free compliant (*2) under the European RoHS directive.
*1: Excluded items (list of the main lead-related items)
• Lead included in glass used in fluorescent tubes, electronic components and cathode-ray tubes
• Lead in high-melting-point solder (i.e. tin-lead solder alloys that contain 85% lead or more)
• Lead in ceramic electronic parts (piezo-electronic devices)
• Mercury contained in fluorescent tubes is also excluded.
*2: Definition of lead-free
A lead content ratio of 0.1 wt% or less in the applicable locations (solder, terminals, electronic components, etc.)
<Reference>
RoHS: The name of a directive issued by the European Parliament aimed at restricting the use of
certain designated hazardous substances included in electrical and electronic equipment.
Designated substances (6): Lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBs) and
polybrominated diphenyl ether (PBDE)
<Lead-free soldering>
When carrying out repairs, use a designated lead-free solder, bearing in mind the differing work practices for conventional
solder (eutectic) and lead-free solder.


Differences in the soldering work for lead-free and eutectic solder
When the soldering work practices for eutectic solder and lead-free solder are compared, the main differences are as shown
below. In particular, when lead-free solder is used, the solder tends to be less workable than when eutectic solder is used.
Accordingly, the soldering techniques used must take that into account.
Difference
The solder starts melting later.
Poor wetting
Solder feed rate is difficult to control.
Wetting the insides of through holes is especially
difficult.
During repairs (or modifications) removing solder
from inside through holes is difficult.
There is serious carbonization of the soldering iron.
The surface is not glossy.
1
2
3
4
5
6
7
Countermeasure
The initial melting point of lead-free solder is high, so you
have to get used to it.
Move the tip of the soldering iron around to heat the entire
connection to the melting temperature and assist wetting.
Use the solder (wire) diameter and soldering iron that are
best suited to connection being soldered.
First apply solder to the area immediately around the
through hold and then feed the solder into the hole.
Use a suitable wicking wire (with a suitable method and
heating) and a suction tool.
Either put solder onto the soldering iron tip after completing
the work, or turn the iron off frequently.
Learn to recognize the appearance of the surface.

4
FinePix A400 Service Manual


Setting temperature during lead-free soldering
• Lead-free solder melting temperature
The melting point of eutectic (Sn-Pb) solder is 183°C, while the melting point of lead-free solder (Sn-Ag-Cu) is 30°C higher
at 220°C.
• Soldering iron tip temperature
The temperature setting for the soldering iron used should be such that the tip of the soldering iron is at the correct
bonding temperature for the connection. This temperature is normally set at around 100°C higher than the melting point of
the solder.
However, the actual temperature should take into account the shape and size of the soldering iron tip, the heat tolerance
of the connection and the workability of that temperature.
• Correct bonding temperature
The correct bonding temperature refers not to the temperature of the heat source, but to the bonding temperature that will
give the best bond strength.


Precautions when soldering with lead-free solder
• Soldering iron maintenance
Because of the high soldering iron temperature in lead-free soldering, there is rapid carbonization of the flux adhering to
the tip of the soldering iron.
(1) Always cover the tip of the soldering iron with solder when it is not being used.
(2) If the tip is black from carbonization, wipe it gently with a paper towel soaked in alcohol until the solder will wet.
• Uniform heating of the board and components
To ensure that the lead-free solder wets the entire surface of the pattern and the lands despite its poor wetting
characteristics, you must move the tip of the soldering iron over a wide area to raise the temperature of the entire
connection.


Soldering iron
A soldering iron with a temperature control is best.

5
FinePix A400 Service Manual
lead-free
Wire diameter 0.8mm
Solder type (Displayed symbol)
SnAgCu


Solder wire (thread)
Use the lead-free solders specified below.
Solder type: Sn96.5Ag3Cu0.5 (Displayed symbol: SnAgCu)
Wire diameter: 0.6, 0.8 or 1.0 mm
Sample:


Flux
Conventional flux can be used.


Solder application wires (mesh, wicking wire, etc.)
Conventional application wires can be used.

6
FinePix A400 Service Manual
MEMO

7
CONTENTS
FinePix A400 Service Manual
CONTENTS
1. General ........................................................... 8
1-1. Product specification .............................................. 8
1-2. Explanation of Terms ............................................ 11
1-3. Names of External Components .......................... 12
2. Disassembly ................................................. 13
2-1. Names of internal Components ............................ 13
2-2. Removing the REAR CASE ASSY ....................... 14
2-3. Disassembling the REAR CASE ASSY ................ 15
2-4. Removing the MAIN PWB ASSY .......................... 16
2-5. Removing the BATTERY HOLDER ASSY ........... 17
2-6. Removing the SUB PWB ASSY ........................... 18
3. Schematics ................................................... 19
3-1. Cautions ............................................................... 19
3-2. Basic Block Names and Functions ....................... 19
3-3. Functions of Primary Blocks ................................. 20
3-3-1. Technical Outline .................................... 20
3-4. Block Diagram ...................................................... 21
3-5. Overall connection Diagram ................................. 22
3-6. Circuit Diagrams ................................................... 23
3-6-1. CAMERA BLOCK ................................... 23
3-6-2. DCDC BLOCK ........................................ 24
3-6-3. MOTOR BLOCK ..................................... 25
3-6-4. PROCESS BLOCK ................................. 26
3-6-5. SUB BLOCK ........................................... 27
3-6-6. KEY BLOCK ........................................... 29
3-6-7. LCD BLOCK ........................................... 30
3-6-8. CCD FPC BLOCK ................................... 31
3-6-9. VIDEO BLOCK ....................................... 31
3-6-10. MEDIA BLOCK ....................................... 32
3-6-11. STRB BLOCK ......................................... 32
3-7. Mounted Parts Diagrams ...................................... 33
3-7-1. CCD FPC ASSY ..................................... 33
3-7-2. MAIN PWB ASSY ................................... 34
3-7-3. SUB PWB ASSY ..................................... 36
4. Adjustments .................................................. 37
4-1. Important point Adjustment when Replacing
Major Parts ........................................................... 37
4-2. Measuring Instruments Used ............................... 37
4-3. Use Jig list ............................................................ 38
4-4. Calibration method of pattern box ........................ 38
4-5. Adjustment software installation ........................... 39
4-5-1. Various downloading software
decompressions, preservation methods,
and notes ................................................ 39
4-5-2. Installation of DSC jig driver ................... 40
4-5-3. Adjustment softwareinitiation method ..... 40
4-6. Initial Settings of the Adjustment Software ........... 41
4-7. Starting the Adjustment Software ......................... 44
4-8. [R] : Flash Memory Reset ..................................... 47
4-9. [F4] : CCD Data Input ........................................... 49
4-10. [F5] : Camera Adjustment ..................................... 52
4-11. [F6] : AF Adjustment ............................................. 56
4-12. [F7] : Flash Adjustment ......................................... 59
4-13. [F1] : Battery Voltage Adjustment ......................... 61
4-14. [F11] : Video Adjustment ...................................... 65
4-15. [F8] : Firmware Download .................................... 67
4-16 [F12] : End Setting ................................................ 69
5. Inspection ..................................................... 73
5-1. Required Measuring Equipment ........................... 73
5-2. Connection of Measuring Equipment ................... 73
5-3. Inspection and Factory Settings ........................... 74
6. Parts List....................................................... 79
6-1. Packing and Accessories ..................................... 79
6-1-1. US-model ................................................ 79
6-1-2. CA-model ................................................ 80
6-1-3. EU-model ................................................ 81
6-1-4. EG-model ................................................ 82
6-1-5. EE-model ................................................ 83
6-1-6. AS-model ................................................ 84
6-1-7. AS-model (JP Production) ...................... 85
6-1-8. CH-model ................................................ 86
6-2. Cabi Front Block ................................................... 87
6-2-1. US/CA/AS-model .................................... 87
6-2-2. EU/EG/EE-model .................................... 88
6-2-3. AS-model (JP Production) ...................... 89
6-2-4. CH-model ................................................ 90
6-3. Cabi Rear Block ................................................... 91
6-4. Electrical parts ...................................................... 92
7. Appendix....................................................... 93
7-1. Function of display for Firmware Version ............ 93
7-2. List of Related Technical Updates Issued ............ 94

8
1. General FinePix A400 Service Manual
1. General
1-1. Product specification
System
Model Digital camera FinePix A400
Effective pixels 4.1 million pixels
CCD 1/2.5-inch Super CCD HR
Storage media Internal memory (approx. 12 MB) / xD-Picture Card (16/32/64/128/256/512 MB/1 GB)
File format Still image: DCF-compliant
Compressed: Exif ver.2.2 JPEG, DPOF-compatible
*Design rule for Camera File System compliant DPOF compatible
Movie: AVI format, Motion JPEG
Number of recorded pixels Still image: 2304
× 1728 pixels/2304 × 1536 pixels/1600 × 1200 pixels/1280 × 960 pixels/
640
× 480 pixels ( / / / / )
Lens Fujinon 3
× optical zoom lens
F3.3-F5.5
Focal length f=6.4 mm-19.2 mm
(Equivalent to approx. 38 mm-114 mm on a 35 mm camera)
Digital zoom Approx. 3.6
× (3 × optical zoom lens is used together: Max. zoom scale: approx. 10.8 × )
Aperture (Wide-angle) F3.3
Focal range Normal: approx. 60 cm (2.0 ft.) to infinity
Macro: approx. 10 cm (3.9 in.) to 80 cm (2.6 ft.)
Sensitivity AUTO/Equivalent to ISO 100/200/400
Photometry TTL 64-zones metering Multi
Exposure control Program AE
Scene position (PORTRAIT), (LANDSCAPE), (SPORT), (NIGHT)
Exposure compensation -2 EV to +2 EV in 1/3 EV-step increments ( )
Shutter speed 2 sec. to 1/1500 sec. (depend on Exposure mode)
Focus Mode: Auto focus
AF system: TTL contrast-type
AF frame selection: AF (CENTER)
White balance Automatic scene recognition/Preset (Fine, Shade, Fluorescent (Daylight), Fluorescent
(Warm White), Fluorescent (Cool White), Incandescent)
Self-timer Approx. 2 sec./10 sec.
Flash type Auto flash
Effective range: ( : AUTO): Wide-angle: approx. 60 cm-3.1 m (2.0 ft.-10.2 ft.)
Telephoto: approx. 60 cm-2 m (2.0 ft.-6.6 ft.)
Macro: approx. 30 cm-80 cm (1.0 ft.-2.6 ft.)
Flash mode Auto, Red-eye Reduction, Forced Flash, Suppressed Flash, Slow Synchro, Red-eye Reduc-
tion + Slow Synchro
Viewfinder Real image optical approx. 75% coverage
LCD monitor 1.8 inches, Aspect ratio: 4:3; 77,000 pixels low-temperature polysilicon TFT, Approx. 94%
coverage
Movie 320
× 240 pixels/160 × 120 pixels ( / )
(10 frames per second)
A series of continuous image can be recorded up to 60 seconds (when setting ) /
240 seconds (when setting ). Zoom cannot be used during movie recording.
Photography functions Best framing, Frame No. memory
Playback functions Trimming, Automatic playback, Multi-frame playback
Other functions PictBridge, Exif print, Language (English, Francais, Deutsch, , Italiano, , ),
Time difference, Discharging rechargeable batteries

9
1. General
FinePix A400 Service Manual
Input/Output Terminal
VIDEO OUT NTSC/PAL-type
(Visual output)
Digital input/output USB
DC input socket AC Power Adapter AC-3VX (sold separately)
Power Supply and Others
Power supply Use one of the following:
• 2
× AA-size alkaline batteries
• 2
× AA-size Ni-MH (Nickel-Metal Hydride) batteries (sold separately)
• AC power adapter AC-3VX (sold separately)
According to the CIPA (Camera & Imaging Products Association) standard procedure for
measuring digital still camera battery consumption (extract):
When using alkaline batteries, use the batteries supplied with the camera. You can use
Ni-MH batteries also. The storage media should be xD-Picture Card.
Pictures should be taken at a temperature of +23°C (+73°F), with the LCD monitor turned
on, the optical zoom moved from full wide-angle to full telephoto (or vice-versa) and back
again to its original position every 30 seconds, the flash used at full power every second
shot and the camera turned off and then on again once every 10 shots.
• Note: Because the number of available shots varies depending on the capacity of
alkaline batteries or the level of charge in Ni-MH batteries, the figures shown here
for the number of available shots using batteries are not guaranteed.
The number of available shots will also decline at low temperatures.
Camera dimensions 93.0 mm
× 60.0 mm × 27.5 mm/3.7 in. × 2.4 in. × 1.1 in.
(W/H/D) (not including accessories and attachments)
Camera mass (weight) Approx. 126 g/4.4 oz. (not including accessories, batteries and xD-Picture Card)
Weight for photography Approx. 174 g/6.1 oz. (including batteries and xD-Picture Card)
Operating conditions Temperature: 0oC to +40oC (+32oF to +104oF)
80% humidity or less (no condensation)
Accessories included zAA-size Alkaline Batteries (LR6) (2)
zStrap (1)
zVideo cable (1) 2.5 mm dia. plug-to-pin plug cable
zUSB cable (mini-B) (1)
zCD-ROM (1) Software for FinePix BZ
zOwner’s Manual (1)
Guide to the number of
available frames for
battery operation
Alkaline batteries Approx. 100 frames
Ni-MH batteries 2500 mAh Approx. 400 frames
Battery Type Number of frames

10
1. General FinePix A400 Service Manual
Power Supply and Others
Optional accessories zxD-Picture Card
16MB/32MB/64MB/128MB/256MB/512MB/1GB
zFujifilm Rechargeable Battery 2HR-3UF
zFujifilm Battery Charger with Battery BK-NH2 (With Euro type or UK type plug)
zAC Power Adapter AC-3VX
zSoft Case SC-FXA03
zSoft Case SC-FXA04
zImage Memory Card Reader DPC-R1
• Compatible with Windows 98/98 SE, Windows Me, Windows 2000 Professional,
Windows XP or iMac, Mac OS 8.6 to 9.2.2, Mac OS X (10.1.2 to 10.2.2) and
models that support USB as standard.
• Compatible with xD-Picture Card of 16 MB to 512 MB, and SmartMedia of 3.3 V, 4
MB to 128 MB.
zPC Card Adapter DPC-AD
• Compatible with xD-Picture Card of 16 MB to 512 MB, and SmartMedia of 3.3 V, 2
MB to 128 MB.
zCompactFlash Card Adapter DPC-CF
• Windows 95/98/98 SE/Me/2000 Professional/XP
• Mac OS 8.6 to 9.2/X (10.1.2 to 10.1.5)
Standard number of available frames/recording time per xD-Picture Card / internal memor y
The number of available frames, recording time or file size varies slightly depending on the subjects photographed. Note also
that the divergence between standard number of frames and the actual number of frames is greater for
xD-Picture Cards with higher capacities.
Quality setting
16 MB
32 MB
64 MB
128 MB
256 MB
Image data size
Number of recorded pixels
F
2304 1728
2304 1536 1280 960 640 480 320 240 160 120
N(10 fps) (10 fps)
7
15
32
64
129
2.0 MB
512 MB
259
15
11
31
64
128
257
980 KB
515
17
35
72
144
290
880 KB
580
33
68
137
275
550
460 KB
1101
12
13 25 93
2
247
497
997
1997
130 KB
3993
94 sec.
189 sec.
6.3 min.
12.7 min.
25.5 min.
51.0 min.
288 sec.
9.7 min.
19.4 min.
39.0 min.
78.1 min.
Internal memory (approx. 12 MB)
5
71 sec. 220 sec.
156.3 min.
1 GB
519 1031 1162 2205
1600 1200
25
50
101
204
409
630 KB
818
19
1639 7995
102.1 min. 313.0 min.

11
1. General
FinePix A400 Service Manual
1-2. Explanation of Terms
Deactivated batteries: Leaving an Ni-MH battery unused in storage for a long period may cause a rise in the level
of substances that inhibit current flow inside the battery and result in a dormant battery.
A battery in this state is referred to as deactivated.
Because current flow is inhibited in a deactivated Ni-MH battery, the battery’s original
level of performance cannot be achieved.
EV: A number denotes Exposure Value. The EV is determined by the brightness of the subject
and sensitivity (speed) of the film or CCD. The number is larger for bright subjects and
smaller for dark subjects. As the brightness of the subject changes, a digital camera
maintains the amount of light hitting the CCD at a constant level by adjusting the aperture
and shutter speed.
When the amount of light striking the CCD doubles, the EV increases by 1. Likewise, when
the light is halved, the EV decreases by 1.
Frame rate (fps): The frame rate refers to the number of images (frames) that are photographed or played
back per second. For example, when 10 frames are continuously photographed in a 1-
second interval, the frame rate is expressed as 10 fps.
For reference, TV images are displayed at 30 fps (NTSC).
JPEG: Joint Photographic Experts Group
A file format used for compressing and saving color images. The higher the compression
rate, the greater the loss of quality in the decompressed (restored) image.
Memory effect: If an Ni-MH battery is repeatedly charged without first being fully discharged, its perfor-
mance may drop below its original level. This is referred to as the “memory effect”.
Motion JPEG: A type of AVI (Audio Video Interleave) file format that handles images and sound as a
single file. Images in the file are recorded in JPEG format. Motion JPEG can be played
back by QuickTime 3.0 or later.
Smear: A phenomenon specific to CCDs whereby white streaks appear on the image when there
is a very strong light source, such as the sun or reflected sunlight, in the photography
screen.
White Balance: Whatever the kind of the light, the human eye adapts to it so that a white object still looks
white. On the other hand, devices such as digital cameras see a white subject as white by
first adjusting the color balance to suit the color of the ambient light around the subject.
This adjustment is called matching the white balance.
Exif Print: Exif Print Format is a newly revised digital camera file format that contains a variety of
shooting information for optimal printing.

12
1. General FinePix A400 Service Manual
1-3. Names of External Components
MENU
/OK
DISP /
BACK
Shutter button
Self-timer lamp
Lens (lens cover)
xD-Picture Card slot
Battery compartment
Playback button
Viewfinder lamp
Viewfinder
LCD monitor
Tripod mount
POWER button
Flash
Viewfinder window
/ Macro button
/ Flash button
VIDEO OUT
(Video output) socket
USB socket (mini-B)
DC IN 3V (power input)
socket
/ Tele zoom
switch
/ Wide zoom
switch
Strap mount
MENU/OK button
DISP (display)/
BACK button
Battery cover

13
2. Disassembly
FinePix A400 Service Manual
2. Disassembly
2-1. Names of internal Components
LCD
LENS CONST
F CASE ASSY
BATTERY HOLDER ASSY
BUZZER
FLASH CASE ASSY
FRAME
REAR CASE
LEAD E.CAP
SUB PWB ASSY
MAIN PWB ASSY

14
2. Disassembly FinePix A400 Service Manual
1
1
3
4
2
2
1
2
6
7
5
2-2. Removing the REAR CASE ASSY
(1) Remove the 4 special screws (M1.7 x 5.0).
(2) Remove the 2 screws (M1.7 x 3.0).
(3) Lift up the REAR CASE in the direction of the arrow.
(4) Remove the REAR CASE ASSY in the direction of the
arrow.
(5) Peel off the FLASH SHEET and discharge the main
capacitor.
Take care not to touch the SUB PWB ASSY before
discharging the capacitor.
(6) Unlock the CN501 connector.
(7) Remove the LCD in the direction of the arrow and
remove the REAR CASE ASSY.
[Assembly]
Assemble by performing the disassembly procedure in
reverse.
[Notes]
(1) Fit the VIDEO OUT side first and then fit the strap
side.
(2) Run the wires so that they do not pinch the LCD.

15
2. Disassembly
FinePix A400 Service Manual
2
1
5
4
3
2-3. Disassembling the REAR CASE ASSY
(1) Remove the 6 screws (M1.4 x 3.0).
(2) Remove the FRAME in the direction of the arrow.
(3) Remove the LCD in the direction of the arrow.
(4) Remove the POWER BUTTON in the direction of the
arrow.
(5) Remove the RELEASE HOLDER in the direction of
the arrow.
[Assembly]
Assemble by performing the disassembly procedure in
reverse.

16
2. Disassembly FinePix A400 Service Manual
1
1
4
1
3
6
2
5
Red
Black
10
9
8
7
SW808
2-4. Removing the MAIN PWB ASSY
(1) Unlock the 3 connectors.
(2) Detach the FPC (MOTOR) from the connector in the
direction of the arrow.
(3) Detach the FPC (MAIN-SUB) from the connector in
the direction of the arrow.
(4) Detach the FPC (CCD) from the connector in the
direction of the arrow.
(5) Remove the soldering at 2 points.
(6) Remove the soldering at 2 points and disconnect the
lead wires.
(7) Remove the 3 screws (M1.7 x 10).
(8) Remove the screw (M1.7 x 4.0).
(9) Open the BATTERY COVER.
(10) Remove the MAIN PWB ASSY in the direction of the
arrow.
[Assembly]
Assemble by performing the disassembly procedure in
reverse.
[Notes]
To avoid damaging SW808, disassemble and assemble
with the BATTERY COVER open.

17
2. Disassembly
FinePix A400 Service Manual
1
2
3
5
4
2-5. Removing the BATTERY HOLDER ASSY
(1) Remove the LENS CONST in the direction of the
arrow.
(2) Remove the F INNER PSP in the direction of the
arrow.
(3) Remove the BUZZER in the direction of the arrow.
(4) Remove the 2 screws (M1.7 x 4.0).
(5) Remove the BATTERY HOLDER ASSY in the
direction of the arrow.
[Assembly]
Assemble by performing the disassembly procedure in
reverse.

18
2. Disassembly FinePix A400 Service Manual
1
2
7
8
5
3
6
4
2-6. Removing the SUB PWB ASSY
(1) Remove the 2 screws (M1.7 x 4.0).
(2) Remove the FLASH CONST in the direction of the
arrow.
(3) Remove the FLASH SHEET.
(4) Remove the soldering at 4 points.
(5) Remove the main capacitor in the direction of the
arrow.
(6) Remove the soldering for T952.
(7) Remove the screw (M1.7 x 4.0).
(8) Remove the SUB PWB ASSY in the direction of the
arrow.
[Assembly]
Assemble by performing the disassembly procedure in
reverse.
[ Note the polarity]
Install the main capacitor so that the negative (-) pole is
towards the front of the camera.

19
3. Schematics
FinePix A400 Service Manual
3. Schematics
3-1. Cautions
<Cautions when replacing parts>
• Do not reuse removed parts. Always use new parts.
• Note that the negative side of tantalum condensers is readily damaged by heat.
• Except for chemical condensers and tantalum condensers, voltage is not displayed on condensers with a voltage
resistance of 50V or less.
• Resistors not marked are 1/16W chip resistors.
•KΩ= 1000Ω, MΩ= 1000KΩ
• B characteristics of variable resistors and semi-fixed resistors are not displayed.
3-2. Basic Block Names and Functions
Part name Block name Function
LENS CONST CCD BLOCK CCD output
MAIN PWB ASSY CAMERA BLOCK CCD output A/D conversion (IC104)
MOTOR BLOCK Shutter/iris/AF/zoom drive (IC701)
VIDEO BLOCK Video IN/OUT (IC401)
KEY BLOCK Key switch
STRB BLOCK Flash charge
MEDIA BLOCK Media data IN/OUT, Shutter SW
LCD BLOCK LCD output CN, Back light control
DCDC BLOCK Power supply generation (IC313), Flash charge control,
Power control
PROCESS BLOCK Image signal processing, USB communications,
system control (IC204)
SUB PWB ASSY STRB BLOCK Flash charge

20
3. Schematics FinePix A400 Service Manual
3-3. Functions of Primary Blocks
3-3-1. Technical Outline
Equipped with a 1/2.5-inch Super CCD HR (with 4.1 effective megapixels) and a Fujinon 3x optical zoom lens.
Features a new image signal processing LSI chip, called the XCS2R_IC (IC204, CSP_IC), built into the MAIN PWB
ASSY. This CPU incorporates the standard peripheral I/O functions as well as the peripheral functions required for still
image processing into a single chip. Standard peripheral I/O consists of the interrupt controller, DMA controller, clock
controller, SDRAM controller, block selection controller, serial I/O, multifunction timer, monitoring timer, programmable I/O
ports, USB 2.0 (Full Speed), microprocessor ADC, microprocessor DAC, image processing circuit, JPEG compression/
expansion circuit, display control circuit, still image processing and card interface circuit.
In the white balance procedure, an algorithm has been installed that provides an estimation of the light source used for
shooting based on the brightness and light source color detected when the shot was taken, and a white balance (WB)
compensation function based on that estimation. The new algorithm is designed to prevent “hunting” due to field-of-view
slippage by providing more accurate brightness and color detection, and to allow the installation of a powerful algorithm
for distinguishing between the light source and the original subject colors.
Flash brightness is adjusted using the CCD-TTL method in which the flash brightness is calculated from the CCD
feedback data generated by the pre-flash.
Explanation of the imaging circuit functions
Analog video signals output from the CCD (1/2.5-inch with 4.1 effective megapixels) undergo pseudo-color correction
processing, adaptive interpolation processing, amplification and signal mixing in the BCS-R_IC (IC104; CSP_IC). The
converted digital signals are then sent to the single-chip image signal processing LSI chip, known as XCS2R_IC (IC204,
CSP_IC).
Input data from the CCD
* The 10-bit digital image data (corresponding to 1H) sent from the imaging circuit (BCS-R) is sent to XCS2R_IC, buffered
in the chip’s IBFC and replaced by 16-bit (96 MHz) data. The replaced 16-bit (96 MHz) image data is then stored in the
XCS2R_IC [SDRAM] via the XCS2R_IC [I/O BUFFER]. The image data for each frame is temporarily stored in the
XCS2R_IC [SDRAM].
* At the same time, the AE for [AUTO] is calculated using the 10-bit image data input to XCS2R_IC and the data required
for AE, AWB and AF is sent to the XCS2R_IC [SDRAM]. In the XCS2R_IC [SDRAM], the data is sent serially to AFE_CS
to obtain the correct AE, AWB and AF.
Recording onto an xD-Picture card
The image data stored in SDRAM is converted to 16-bit (96-MHz) data by [IBFC] in XCS2R_IC one line at a time and
then sent to [YC PRO]. In [IBFC], the 32-bit Y and C signals are each converted to 8-bit Y, Y, Cb and Cr signals and sent
to the XCS2R_IC [SDRAM]. The image data stored in the XCS2R_IC [SDRAM] is compressed using [JPEG] in
XCS2R_IC and then recorded sequentially onto the xD-Picture card via [MEDIA] in XCS2R_IC.
Playing back images from an xD-Picture card
The compressed image data from the xD-Picture card is sent to XCS2R_IC and stored in the XCS2R_IC [SDRAM] via
[MEDIA]. The compressed image data stored in the XCS2R_IC [SDRAM] is expanded using [JPEG] and again stored in
the XCS2R_IC [SDRAM]. The expanded image data is sent to [YC PRO] via [IBFC]. In [YC PRO], gain control and
aperture processing is applied for the brightness signals and color difference signals, after which the data is again stored
in the XCS2R_IC [SDRAM]. The image data is then displayed via [ENCD] and [D/A].
In movie shooting mode
The 10-bit digital image data output from the imaging unit is converted to 8-bit Y and C signals by the XCS2R_IC [YC
PRO] and sent to the XCS2R_IC [SDRAM]. The image data is compressed using [JPEG] in XCS2R_IC and again stored
in the XCS2R_IC [SDRAM]. The compressed data is then recorded sequentially onto the xD-Picture card via [MEDIA] in
XCS2R_IC.
The imaging system adjustment data is stored in FLASH_ROM (IC201).
Explanation of the LCD controller functions
The R, G and B signals processed in the XCS2R_IC image signal processor are output to the LCD panel via [LCD
CONST].
LCD Unit
The LCD monitor (1.8-inch 77,000 pixels) used in the camera uses a low-temperature polysilicon TFT color LCD screen.
Power Supply Section
Power supply circuits constructed in the core of the HPS_IC (IC313) create the following power supplies, which are
supplied to each block.
CAM3.3V [IC104 (BCS-R), IC103 (V_Drv)]
15V [IC103 (V_Drv), IC11 (CCD)]
5V [IC103 (V_Drv)]
-8V [IC103 (V_Drv), IC11 (CCD)]
3.3V_SYS [IC701 (Motor_Drv), IC204 (XCS2R)]
3.3V_ RUN [IC701 (Motor_Drv)]
1.5V_RUN [IC204 (XCS2R)]
8.5V_LCD [LCD (CN501)]
3VA_OUT [LCD (CN501), IC401 (Video Driver)]
VUNREG [STRB (CN901)]