Nikon D50 Service Manual

作成承認印 配布許可印

VBA12001-R.3668.A

Copyrighｃ2005 by Nikon Corporation.
All Rights Reserved.
無断転載を禁ず

!!

Printed in Japan June 2005

VBA12001

REPAIR MANUAL

Ｍ

サービス

計画課

- M1･ -

VBA12001-R.3668.A

Type Single-lens reex digital camera with interchangeable lenses

Effective pixels 6.1 million
CCD 23.7 × 15.6 mm; total pixels: 6.24 million

Image size (pixels) • 3008 × 2000 (Large) • 2256 × 1496 (Medium)

• 1504 × 1000 (Small)

Lens mount Nikon F mount (with AF coupling and AF contacts)

Compatible lenses*
Type G or D AF Nikkor All functions supported
Micro Nikkor 85 mm

f/2.8D

All functions supported except autofocus and some exposure

modes
Other AF Nikkor† All functions supported except 3D color matrix metering II
AI-P Nikkor All functions supported except 3D color matrix metering II and

autofocus
Non-CPU Can be used in mode M, but exposure meter does not function;

electronic range nder can be used if maximum aperture is f/5.6

or faster

* IX Nikkor lenses can not be used † Excluding lenses for F3AF

Picture angle Equivalent in 35-mm format is approximately 1.5 times lens

focal length
Viewnder Fixed-eyelevel penta-Dach-mirror type

Diopter adjustment –1.6 – +0.5 m–1
Eyepoint 18 mm (–1.0 m–1)
Focusing screen Type B BriteView clear matte screen Mark V with superimposed

focus brackets
Frame coverage Approximately 95% of lens (vertical and horizontal)
Magnication Approximately 0.75× (50-mm lens at innity; –1.0 m–1
Reex mirror Quick return
Lens aperture Instant return with depth-of-eld preview
Focus-area selection Can be selected from 5 focus areas
Lens servo • Autofocus (AF): Instant single-servo AF(AF-S);continuous-

servo AF (AF-C); auto AF-S/AF-C selection(AF-A); predictive

focus tracking automatically activated according to subject status

• Manual focus (M)

Specications

- M2･ -

VBA12001-R.3668.A

Autofocus TTL phase detection by Nikon Multi-CAM900 autofocus module

with AF-assist illuminator (range approximately 0.5–3.0 m / 1´8″–

9´10″)
Detection range –1 – +19 EV (ISO 100 at 20 °C/68 °F)
AF-area mode Single-area AF, dynamic-area AF, dynamic-area AF with closest

subject priority
Focus lock Focus can be locked by pressing shutter-release button halfway

(single-servo AF) or by pressing AE-L/AF-L button
Exposure
Metering Three-mode through-the-lens (TTL) exposure metering

Matrix 3D color matrix metering II (type G and D lenses); color matrix

metering II (other CPU lenses); metering performed by 420-

segment RGB sensor
Center-weighted Weight of 75% given to 6, 8, 10, or 12-mm circle in center of

frame
Spot Meters 3.5-mm circle (about 2.5% of frame) centered on active

focus area
Range

(ISO 100 equivalent, f/1.4 lens,

20 °C/68 °F)

0 – 20 EV (3D color matrix or center-weighted metering)

2 – 20 EV (spot metering)

Exposure meter coupling CPU coupling
Exposure control
Operating mode

Digital Vari-Program（ auto, portrait,

landscape,

Child, close up, sports,

night portrait),

programmed auto (P) with exible program; shutter-priority

auto (S); aperture priority auto (A); manual (M)

Exposure compensation　

–5 – +5 EV in increments of 1/3 or  EV
Bracketing Exposure and / or ash bracketing (up to ± 2EV over 3

exposures)
Exposure lock Luminosity locked at detected value with AE-L/AF-L button

Shutter

Combined mechanical and CCD electronic shutter

Speed

30 – 1/4000 s in steps of 1/3 or  EV, bulb, remote
Sensitivity

200 – 1600 (ISO equivalent) in steps of 1/3 EV
White balance Auto (TTL white-balance with 420 pixels RGB sensor), six

manual modes with preset white balance
Bracketing 3 exposures in increments of 1, 2, or 3

- M3･ -

VBA12001-R.3668.A

Built-in Speedlight

• , ,

, ,

auto flash with auto pop-up

• P, S, A,

M

: manual pop-up with button release

Guide number

(m / ft at 20 °C/68 °F)

• ISO 200: approximately 15/49 (manual 17/56)

• ISO 100: approximately 11/36 (manual 12/39)

Flash
Sync contact

X-contact only; ash synchronization at up to 1/500 s

Flash control
TTL TTL ash control by 420-segment RGB sensor (CPU lenses only)

• Built-in Speedlight: i-TTL balanced ll-ash for digital SLR,

or standard i-TTL ash for digital SLR (spot metering or mode

dial set to M)

• SB-800 or 600: i-TTL balanced ll-ash for digital SLR, or

standard i-TTL ash for digital SLR (spot metering)

Auto aperture Available with SB-800 with CPU lens
Non-TTL auto Available with such Speedlights as SB-800, 80DX, 28DX, 28,

27, and 22s
Range-priority manual Available with SB-800
Sync modes

• 、 、

、 : front curtain sync, red-eye reduction

•

: slow sync, slow sync with red-eye reduction

•

、

: front curtain sync and red-eyereduction available

with optional Speedlights

•

P, S

, A,

M

: front curtain sync, slow sync, rear-curtain sync,

red-eye reduction, slow sync with red-eye reduction
Flash compensation

–3 – +1 EV in increments of 1/3 or  EV
Accessory shoe Standard ISO hot-shoe contact with safety lock
Creative Lighting

System

Supports Flash Color Information Communication and FV lock

with built-in Speedlight, SB-800, and SB-600. SB-800 and 600

also support Advanced Wireless Lighting.
Storage
Media SD (Secure Digital) memory cards
File system Compliant with Design Rule for Camera File System (DCF)

2.0 and Digital Print Order Format (DPOF)

Compression • NEF (RAW): compressed 12-bit

• JPEG: JPEG baseline-compliant

- M4･ -

VBA12001-R.3668.A

Self-timer Electronically controlled timer with 2 – 20 s duration
Monitor 2.0″, 130,000-dot, low-temperature polysilicon TFT LCD with

brightness adjustment

Video output Can be selected from NTSC and PAL
External interface USB 2.0 Hi-speed
Tripod socket ″ (ISO)
Firmware upgrades Firmware can be upgraded by user
Supported languages Chinese (Simplied and Traditional), Dutch, English, French,

German, Italian, Japanese, Korean, Portuguese, Russian,Spanish,

Swedish

Power source • One rechargeable Nikon EN-EL3 Li-ion battery;

charging voltage (MH-18a quick charger or optional MH-19

multi charger): 7.4 V DC

• EH-5 AC adapter (available separately)

Dimensions (W × H × D) Approximately 133 × 102 × 76 mm (5.2″ × 4.0″ ×3.0″)

Weight Approximately 540 g (1 lb 3 oz) without battery, memory card,

body cap, or monitor cover

Operating environment
Temperature 0 – 40 °C (+32 – 104 °F)
Humidity Less than 85% (no condensation)

• Unless otherwise stated, all gures are for a camera with a fully-charged battery operating at an

ambient temperature of 20 °C (68 °F).

• Nikon reserves the right to change the specications of the hardware and software described this

manual at any time and without prior notice. Nikon will not be held liable for damages that may

result from any mistakes that this manual may contain.

- Ｄ1 ･ -

VBA12001-R.3668.A

Points to notice for Disassembly / Assembly

�

内部に高電圧部あり。カバーを外す 時は感電に注意すること。

カバーを外した後は、修理指針の指 示に従ってメインコンデン

サーの放電を必ず行うこと。

警告

Note:

①　

When disassembling/(re)assembling, be sure to use the conductive mat (J5033) and wrist strap (J5033-5)

for static protection of electrical parts.

②　

Before disassembling, be sure to remove batteries or AC power wires.

③　

When disassembling, make sure to memorize the processing state of wires and FPC, screws to be xed

and their types, etc. 　　　　

④　Because the low pass lter of the imaging CCD PCB is easily damaged, handle it with enough care.

Points to notice for Lead-free solder products

　・ Lead-free solder is used for this product.

　・ For soldering work, the special solder and soldering iron are required.

　・ Do NOT mix up lead-free solder with traditional solder.

WARNING

Due to an internal high voltage area,

take extra care not to

get an electric shock when detaching covers.

.
After removing covers, be sure to discharge the main
condenser according to the instructions of repair manuals

.

Note:

When "Seprating Front and Rear bodies","Disassembling Image PCB",and"Disassembling Bayonet",

be sure to perform"Reset of AF defocus compensation amount"by D2X adjustment software after reassembly.

- Ｄ2 ･ -

VBA12001-R.3668.A

Disassembly

1. Separation of Front and Rear Bodies

Bottom Cover

#5692

#5697

#5677×7

Bottom cover

・

Take out the screws (#5692 and #5697) and 7 screws (#5677).

・

Remove the bottom cover.

Rear cover

・

Take out 4 screws (#623).

・

Cover to remove the rear cover.

Note: Remove the rear cover slowly so as not to cut TFT-PCB

connection FPC of the upper portion of the cover.

#623×4

Rear cover

- Ｄ3 ･ -

VBA12001-R.3668.A

SB pop-up

Approx.2cm

Approx. 4cm

・

Remove TFT-PCB connection FPC from the connector.

・

Cut the tracing lm sheet, etc into the below size of piece. Then insert it into

the clearance of the top cover pop-up part as shown right, and pop it up by
sliding the sheet in the direction of the arrow.

TFT-PCB connection FPC

- Ｄ4 ･ -

VBA12001-R.3668.A

Discharge Main condenser

・

Discharge the main condenser from its both terminal.

#627 × 3

Main
condenser

2KΩ/5W

�

内部に高電 圧部 あり 。カ バーを外す時は感電に注意す るこ と。

カバーを外 した 後は 、修 理指針の指示に従ってメイン コン デン

サーの放電 を必 ず行 うこ と。

警告

Covers

・

First, remove the front cover (#B5024).

#B5028

WARNING

Due to an internal high voltage area, take extra care not to get an

electric shock when detaching covers.

After removing the covers, be sure to discharge the main

condenser according to the instructions of repar manuals.

#635

#659

#5124

#5121

#611×2

#635

#635

#26

#B5024

A

U

T

O

#611 × 2

- Ｄ5 ･ -

VBA12001-R.3668.A

DG shield plate

#78

#627×3

DG-PCB unit

・

Remove 5 connectors.

・

Unsolder 2 reset SW wires.

・

Take out 2 screws (#663) and the screw (#627) to remove the DG-PCB unit (#B2031).

・

Remove 2 soldering bridges.

・

Take out 3 screws (#627).

・

Remove the DG shield plate (#78).

Soldering bridges

Green

Yellow

: Reset SW wire

#663×2

#627

#B2031

- Ｄ6 ･ -

VBA12001-R.3668.A

・

Take out 3 screws (#669) to remove the CCD/FPC unit (#B2032).

CCD/FPC unit

#669×3

#B2032

- Ｄ7 ･ -

VBA12001-R.3668.A

Top Cover

・

Unsolder 4 wires.

・

Take out 2 screws each of (#635, #656, and #5618).

The eyepiece frame (#B271) comes off, too.

Black

Orange

White

Gray

・

Remove the top cover FPC (#1007) from the connector.

・

Unsolder 2 wires of the top cover FPC.

* The solder land of gray wire is same as AF assist lanp unit.

Black

*Gray

＃

656

#5618×2

#B271

#B0023

#656

#635×2

Top cover FPC

- Ｄ8 ･ -

VBA12001-R.3668.A

Fig.1

・

Remove the tape (#709).

・

Remove the optical ber (#470) from the sensor.

#629×2

Note) Both ends of the optical ber are just

inserted in each part without any adhesive.

Optical ber

#470

#709

SB upper case

　・

Press the pop-up lever A part of the top cover unit so that the built-in SB pops up.

　・

Take out 2 screws (#629).

　・

Push from beneath the hooking lever of the SB upper case as shown in Fig.1 . Then slide 2 hooks in the

direction of the arrow to remove the lever.

　・

Deactivate pop-up of the SB lower case unit, and remove the SB upper case. (Fig.2)

Pop-up lever A part

SB upper case

Fig.2

Hooking lever

SB lower case unit

- Ｄ9 ･ -

VBA12001-R.3668.A

・

Remove the wire-retaining screw (#650).

・

Remove wires.

Top cover FPC / Wiring

・

Remove the soldering bridges.

・

Remove the 2 solders of AF-assist illuminating lamps.

・

Remove the solders of 2 SPD sensor wires.

・

Remove the solders of 2 pop-up change SW wires.

・

Remove the solders of 5 accesory shoe contacts.

#

650

SPD sensor wire (Green)

SPD sensor wire (Black)

AF-assist illuminating
lamp

AF-assist illuminating lamp

（

covered for insulation

）

Soldering bridges

Pop-up change switch (Black)

Pop-up change switch (Green)

Accessory shoe contact ×5

Wires

- Ｄ10 ･ -

VBA12001-R.3668.A

・

Remove #B341 and #B342.

Flash-up spring

#650

#305

#306

#308

2 hooks

#B2302

SB lower case unit

・Unhook the Flash-up spring

(#305).

・Take out the screw (#650) and

remove the Flash-up spring
(#305).

・Pull each wire out of hole.

・Loosen 2 hooks of the collar (#308) to remove it.

・Remove the SB case axle (#306).

・Detach the SB lower case unit (#B2302) from the top cover.

#B341

#B342

- Ｄ11 ･ -

VBA12001-R.3668.A

M/DFPC unit

AF-assist illuminating lamp / Command dial

・

Take out 2 screws (#640) to remove the M/DFPC unit (#B2455).

・

Remove the rubber SW (#389) and shooting operation-mode button (#388).

・

Remove the light-leak proof sponge (#766).

・

Take out the screw (#635).

・

Remove the AF-assist illuminating lamp (#B325).

・

Remove 2 screws (#635).

・

Lift to slack the command dial (#B367).

#640 × 2

#388

#389

#B2455

#766

#635

#B325

#B367

#635 × 2

- Ｄ12 ･ -

VBA12001-R.3668.A

Top cover FPC

・

Take out the screw (#644).

・

Take out 5 screws (#635).

・

Remove the top cover FPC (#B2007).

・

Remove the AE-L rubber SW (#387) and AE-L button (#386).

#B2007

#331

#1044

#B367

#733

#1007

#735

#734

#332 × 2

#330

#386

#387

#644

#635 × 5

- Ｄ13 ･ -

VBA12001-R.3668.A

Release button / other small parts

#5460

#461

#350

#351

#5345

#

352

#387

#5386

#5381

#382

#347

#348

#604 × 2

#335

#5383

- Ｄ14 ･ -

VBA12001-R.3668.A

Outer LCD window / shoe mold unit / accessory shoe / other small parts

#452

#454

#654 × 4

#322

#640

#336 × 2

#337 × 2

#453

#338

#5451

B317

#316

#318

#321

#326

#463

- Ｄ15 ･ -

VBA12001-R.3668.A

Main PCB unit

Removal of Connector

・

Remove 2 FPCs from the connector

・

Remove 3 FPCs from the connector.

・

Unsolder 10 wires.

・

Take out 3 screws (#640) to remove the

main-PCB unit from the sub-PCB.

Blue

Black

#640×3

Red

Orange

Blue

Black

Red

White

Pink

Main PCB unit #1001

Brown

- Ｄ16 ･ -

VBA12001-R.3668.A

Separation of Front and Rear bodies

#642×3

Front body

Rear body

#699×3

#634×4

・

Take out 3 screws (#699), 4 screws (#634), and 3 screws (#642) to remove the front body.

- Ｄ17 ･ -

VBA12001-R.3668.A

2. Rear body

・

Unsolder 3 wires of electronic buzzer .

・

Remove the soldering bridges.

・

Take out 3 screws (#644).

・

Remove Sub-PCB.(#B2002)

・

Take out 3 screws (#673).

・

Remove the retaining plate (#159).

・

Remove the battery-extrusion spring (#158).

・

Remove the electronic buzzer unit (#1055).

Sub-PCB unit

Electronic buzzer unit / Battery-extrusion spring

#

644×3

#673×3

#158

#

159

#1055

3 wires of electronic buzzer .

Soldering bridges

#B2002

- Ｄ18 ･ -

VBA12001-R.3668.A

・

Unsolder 2 wires of the clock battery unit.

・

Remove 2 screws (#642).

・

Remove the clock battery holder (#73).

・

Remove the clock battery unit (B1059).

＃

642×2

Clock battery unit

Black

Red

#73

（

B1059

）

- Ｄ19 ･ -

VBA12001-R.3668.A

Bottom wires

Black

Red

Yellow

Blue

Wire arrangement tape

#715×2

・

Remove 2 pieces of tape that arrange wires (#715).

・

Remove wires.

・

Unsolder 4 wires of DC/DC PCB unit.

SB-PCBwires

Be careful that some PCBs at the inital stage of mass-production have

different colored wire.

Black

Red

Blown

Blue

Black

Red

Blown

Red

White marking is

painted for

identication.

- Ｄ20 ･ -

VBA12001-R.3668.A

・

Take out 2 screws (#693).

・

Remove the DC/DC PCB unit (B2030).

#627×2

#633

#693×2

・

Take out 2 screws (#627).

・

Take out the screw (#633).

・

Remove the SQ-PCB (B91).

DC/DC PCB unit

SQ PCB

(B91

）

（

B2030

）

- Ｄ21 ･ -

VBA12001-R.3668.A

・

Take out 4 screws (#635).

・

Remove the bottom base unit (#66) and bottom conduction plate (#106).

・

Take out the screw (#647).

・

Remove #80.

・

Take out the screw (#633).

・

Remove #81.

・

Remove #2030.

・

Take out 2 screws (#633).

#633×2

Lug plate / Bottom base unit

#80

#647

#633

#81

#2030

#635×4

#106

#66

- Ｄ22 ･ -

VBA12001-R.3668.A

・

Remove the condenser (B1043).

・

Take out 2 screws (#635).

・

Remove the SB unit (B2041).

SB unit

（

B1043

）

#635×2

（

B2041

）

The condensor (#B1043) is xed

with 2 pieces of the both-sided

adhesive tape (#754).

- Ｄ23 ･ -

VBA12001-R.3668.A

#680×2

#746

#777

#150

#146

#617×2

#145

#149

#617×2

#76×2

#714

#790

#761

#765

#790×2

#764×2

#747

Rear body small parts

- Ｄ24 ･ -

VBA12001-R.3668.A

3. Front Body

・

Take out 3 screws (#291) to remove the metering FPC unit (#B2008).

・

3 springs (#290) come off.

・

Take out 2 screws (#635) to remove the metering FPC-base unit (#B286).

・

Remove the tape (#796).

・

Take out the screw (#635) to remove the eyepiece-lens unit (#B261).

Note:
The screws (#291) are attached with the
adhesive.
In case they (#291) are moved, AE CCD
position adjustment (ref. Assembly) becomes
necessary.

#796

Eyepiece unit

Metering FPC unit

#291×3

#290×3

#635×2

#B286

#B2008

#635×2

#B261

- Ｄ25 ･ -

VBA12001-R.3668.A

Penta unit

#284

#283

#9

#1046

#B279×2

#282

#B1021

#278

#B277

#642×2

#B4-2

#255

#256

#642×2

#297

#3

#739×2

Adhesive

#709×2

#792A×2

#280×2