Sony PCM-D50 - Portable Linear Pcm Recorder User manual

SERVICE MANUAL
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
PCM-D50
SPECIFICATIONS
LINEAR PCM RECORDER
9-887-869-01
2007J04-1
© 2007.10
US Model
Canadian Model
Ver. 1.0 2007.10
Recording media
Built-in flash memory 4 GB, “Memory Stick” (not supplied), Linear PCM
Stereo recording
Maximum recordable time (Approximate)
The total maximum recordable time (approximate) of all the folders is as follows.
Built-in flash memory (4 GB)
Sampling frequency/
quantifying bit number Maximum recordable time *
22.05 kHz 16 bit 12 hrs 55 min.
44.10 kHz 16 bit 6 hrs 25 min.
44.10 kHz 24 bit 4 hrs 15 min.
48.00 kHz 16 bit 5 hrs 55 min.
48.00 kHz 24 bit 3 hrs 55 min.
96.00 kHz 16 bit 2 hrs 55 min.
96.00 kHz 24 bit 1 hr 55 min.
“Memory Stick PRO-HG Duo”
Sampling frequency/
quantifying bit number Maximum recordable time *
1 GB 2 GB 4 GB
22.05 kHz 16 bit 3 hrs 5 min. 6 hrs 25 min. 12 hrs 50 min.
44.10 kHz 16 bit 1 hr 30 min. 3 hrs 10 min. 6 hrs 25 min.
44.10 kHz 24 bit 1 hr 0 min. 2 hrs 5 min. 4 hrs 15 min.
48.00 kHz 16 bit 1 hr 25 min. 2 hrs 55 min. 5 hrs 55 min.
48.00 kHz 24 bit 55 min. 1 hr 55 min. 3 hrs 55 min.
96.00 kHz 16 bit 40 min. 1 hr 25 min. 2 hrs 55 min.
96.00 kHz 24 bit 25 min. 55 min. 1 hr 55 min.
* The maximum recordable time varies depending on recording conditions.
- Continued on next page -
Capacity
Part of the memory capacity is allocated to data management.
Actual usable capacity: Approx. 3.83 GB (4,116,611,072 bytes)

PCM-D50
2
Linear PCM
Quantization: 16-bit linear, 24-bit
linear
Frequency range (Input from the LINE
IN (OPT) jack when recording/
playing back) (0 to –2 dB):
Fs 22.05 kHz: 20 to 10,000 Hz
Fs 44.10 kHz: 20 to 20,000 Hz
Fs 48.00 kHz: 20 to 22,000 Hz
Fs 96.00 kHz: 20 to 40,000 Hz
MP3 compatible bit rates, sampling
frequencies
MPEG Ver. 1 Layer 3:
32, 44.1, 48 kHz
32 to 320 kbps, VBR
MPEG Ver. 2 Layer 3:
16, 22.05, 24 kHz
32 to 160 kbps, VBR
Signal-to-noise ratio (S/N) (Input from the
LINE IN (OPT) jack when recording/playing
back) 93 dB or above (1 kHz IHF-A)
(for 24 bit)
Total harmonic distortion (Input from the
LINE IN (OPT) jack)
22.05 kHz 16 bit, 44.10 kHz 16/24 bit:
0.01% or below (1 kHz, 22 kHz LPF)
48.00 kHz 16/24 bit, 96.00 kHz
16/24 bit: 0.01% or below
(1 kHz, 22 kHz LPF)
Wow and flutter
Below measurable limit (less than
±0.001% W.PEAK)
Input/output
N
(microphone) jack (stereo mini jack)
Input impedance: 22kΩ
Rated input level: 2.5mV
Minimum input level: 0.7mV
J(headphone) jack (stereo mini jack)
Rated output level: 400mV
Maximum output level:
25mW + 25mW or more
Load impedance: 16Ω
LINE IN (OPT) jack
Input impedance: 40kΩ
Rated input level: 2.0V
Minimum input level: 450mV
Input level: –24.5 to –14.5 dBm
(for optical digital input)
Absorption wavelength:
630 to 690 nm
(for optical digital input)
LINE OUT (OPT) jack
Output impedance:
1 kΩfor European model/
220Ωfor other models
Rated output level: 1.7V
Load impedance: 22kΩ
Output level: –21 to –15 dBm
(for optical digital output)
Emission wavelength: 630 to 690 nm
(for optical digital output)
DC IN 6V jack
USB connector (Hi-speed USB, Mass
Storage Class)
Memory Stick slot
General
Power requirements
DC IN 6V
Four LR6 (size AA) alkaline batteries
(supplied)
Four nickel metal hydride
rechargeable batteries NH-AA (not
supplied)
Power consumption
0.75 W
Dimensions
Approx. 72.0 × 154.5 × 32.7 mm
(27/8×6
1/8×1 5/16 inches) (w/h/d)
(not including projecting parts and
controls)
Mass 365 g (12.88 oz) (including batteries)
• USB cable
• AC power adapter (6V)
• Four LR6 (size AA) alkaline batteries
• CD-ROM (“Sound Forge Audio Studio LE”)
• Operating Instructions
Supplied accessories
Design and specifications are subject to change
without notice.

PCM-D50
3
UNLEADED SOLDER
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)
: LEAD FREE MARK
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.
Flexible Circuit Board Repairing
• Keep the temperature of 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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED COMPONET WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

PCM-D50
4
1. GENERAL .................................................................. 5
2. DISASSEMBLY
2-1. Panel (Front) Assy .......................................................... 11
2-2. Ornamental Belt (Upper) Assy ....................................... 11
2-3. Backlight Board.............................................................. 12
2-4. Power Board ................................................................... 12
2-5. REC VOLAssy, HP VOLAssy ...................................... 13
2-6. DA Board........................................................................ 13
2-7. AD Board, MIC001, MIC002......................................... 14
2-8. System Board.................................................................. 14
3. TEST MODE ............................................................ 15
4. DIAGRAMS
4-1. Block Diagram - AD Section -....................................... 20
4-2. Block Diagram - DA Section -....................................... 21
4-3. Block Diagram - Power Section -.................................. 22
4-4. Printed Wiring Board - AD Section (1/2) -.................... 23
4-5. Printed Wiring Board - AD Section (2/2) -.................... 24
4-6. Schematic Diagram - AD Section (1/3) -....................... 25
4-7. Schematic Diagram - AD Section (2/3) -....................... 26
4-8. Schematic Diagram - AD Section (3/3) -....................... 27
4-9. Printed Wiring Board - DA Section (1/2) -.................... 28
4-10. Printed Wiring Board - DA Section (2/2) -.................... 29
4-11. Printed Wiring Boards
- Backlight/HP Volume/REC VOL Flexible Section -.... 30
4-12. Schematic Diagram - DA Section -................................ 31
4-13. Printed Wiring Board - System Section (1/2) -.............. 32
4-14. Printed Wiring Board - System Section (2/2) -.............. 33
4-15. Schematic Diagram - System Section (1/5) -................. 34
4-16. Schematic Diagram - System Section (2/5) -................. 35
4-17. Schematic Diagram - System Section (3/5) -................. 36
4-18. Schematic Diagram - System Section (4/5) -................. 37
4-19. Schematic Diagram - System Section (5/5) -................. 38
4-20. Printed Wiring Board - Power Section (1/2) - ............... 39
4-21. Printed Wiring Board - Power Section (2/2) - ............... 40
4-22. Schematic Diagram - Power Section (1/4) -.................. 41
4-23. Schematic Diagram - Power Section (2/4) -.................. 42
4-24. Schematic Diagram - Power Section (3/4) -.................. 43
4-25. Schematic Diagram - Power Section (4/4) -.................. 44
5. EXPLODED VIEWS
5-1. Front Panel Section......................................................... 64
5-2. LCD Section ................................................................... 65
5-3. VOL Section ................................................................... 66
5-4. MIC Section.................................................................... 67
5-5. Rear Panel Section.......................................................... 68
6. ELECTRICAL PARTS LIST .............................. 69
TABLE OF CONTENTS

PCM-D50
5
SECTION 1
GENERAL
12
Identifying parts and controls
Front Right side
This section is extracted
from instruction manual.

PCM-D50
6
13
Overview
Continued on the next page
Built-in microphones (page 21)
Peak level lamps (L/R) (page 24)
Displays left and right peak levels of an
audio signal input with -12dB (green) and
OVER (red) lamps.
Display (page 15)
Volume dial (page 26)
Adjusts the playback volume by turning the
dial to set the desired level (0 to 10) to the
“•” position.
A-B (repeat A-B) button (page 34)
FF (fast-forward) /W(up) button
(pages 19, 32)
(folder)/MENU button (pages 20, 23,
31, 40)
When pressed briefly, switches folders.
When pressed and held, displays the menu.
LIGHT button
Turns the backlight of the display on or off.
FR (fast-rewind) / 7(down) button
(pages 19, 32)
REC LEVEL (recording level) dial (page 24)
Adjusts the recording volume by turning the
dial to set the desired level (0 to 10) to the
“•” position.
RB DISPLAY button (page 15)
Switches time information on the display.
RT 9PAUSE button/indicator (pages 24, 25,
32)
RE ACCESS indicator (pages 18, 45)
Flashes when the recorder is accessing
memory (except during recording).
RG [REC (recording) button/indicator
(page 24)
RH DIVIDE button (page 35)
RI /PLAY/ENTER button/indicator
(pages 31)
RK YSTOP button (pages 25, 32)
RL
N
(microphone) jack (page 27)
RM LINE IN (OPT) (line input (optical)) jack
(pages 28 - 30)
X Memory Stick slot (page 45)
XB POWER switch (page 18)
Turns the power “ON” or “OFF.”
XT Battery compartment lid (page 17)
XE Slot for a wrist strap
(A strap is not supplied.)

PCM-D50
7
14
Left side LIMITER switch (pages 22, 43)
LOW CUT FILTER switch (pages 22, 43)
Hole for attaching the tripod (not supplied)
INPUT switch (pages 23, 28, 29, 30)
When set to “N” (microphone), records an
audio signal input from the built-in
microphones or an external microphone that
is connected to the
N
jack.
When set to “LINE,” records an audio signal
output from external equipment that is
connected to the LINE IN (OPT) jack.
LINE OUT (OPT) (line output (optical)) jack
(page 34)
J(headphone) jack (pages 26, 31)
MIC ATT (microphone attenuator) switch
(page 22)
USB connector (page 36)
DC IN 6V jack (page 19)
HOLD switch
When set to “ON,” the buttons on the
recorder are locked to prevent accidental
operation. It is recommended that you set
this switch to “ON” during recording and
playback. To unlock the controls, set it to
“OFF.”
RB DPC (Digital Pitch Control) switch (pages
33, 42)
RT REMOTE jack (page 30)
Identifying parts and controls (continued)

PCM-D50
8
15
Overview
Display RE Time information
Each time theDISPLAY button is pressed,
the time information changes as follows
(Flashes when the recorder is paused):
/Elapsed recording/playback time
Remaining recordable time of the
current memory (During playback:
Remaining time of the current track)
Recorded date
(During recording: Recording start date)
RG Recording/playing status
Displays as follows according to the current
operation:
Recording
(Flashing) Recording pause, standby for
recording
Playback
(Flashing) Playback pause
Stop
/ Fast reverse/forward
/ Go to previous/succeeding
tracks
RH Level meter/peak values (page 24)
Displays the level meter and the maximum
value of the peak level. When the level
exceeds the set value, appears.
While an MP3 file is being played, displays
the artist name and title information.
Continued on the next page

PCM-D50
9
16
RI Memory Stick indicator
Displayed when the current memory is a
“Memory Stick.”
RK Folder number, track numbers
Folders are classified into (a folder for
recording and playback) and (a folder for
playback only) (page 38). Track numbers are
displayed as “current track number/total
number of tracks.”
RL Recording mode
Displays the recording mode currently
specified in the menu in the stop mode.
During playback or recording, displays the
recording mode of the current track.
RM Limiter setting
Displayed when the LIMITER switch is set to
“ON.”
X LCF setting
Displayed when the LOW CUT FILTER switch
is set to “ON.”
XB SYNC REC setting
Displayed when the “SYNC REC” is set to
“ON.”
XT Remaining memory amount
Displays the remaining amount of current
memory (page 25).
XE File information
Displays the file name of the track.
XG Remaining battery power (page 18)
Identifying parts and controls (continued)

PCM-D50
10
SECTION 2
DISASSEMBLY
• This set can be disassembled in the order shown below.
2-1. PANEL (FRONT) ASSY
(Page 11)
2-2. ORNAMENTAL BELT (UPPER) ASSY
(Page 11)
2-3. BACKLIGHT BOARD
(Page 12)
2-5. REC VOL ASSY,
HP VOL ASSY
(Page 13)
2-6. DA BOARD
(Page 13)
2-7. AD BOARD,
MIC001, MIC002
(Page 14)
2-8. SYSTEM BOARD
(Page 14)
2-4. POWER BOARD
(Page 12)
SET