DIGITAL STILL RECORDER
Model Name Using Similar Mechanism
MD Mechanism Type
Base Unit Name
Optical Pick-up Name
U.S and foreign patents licensed from Dolby Laboratories
-- Continued on next page --
Picture MD recording system
Data compression/saving system
FINE mode : 128kB
(the maximum 1,000 images)
STANDARD mode : 64kB
(the maximum 2,000 images)
400 rpm to 900 rpm (CLV)
Advanced Cross Interleave Reed
Solomon Code (ACIRC)
Semiconductor laser (
= 780 nm)
Emission duration : continuous
Max 44.6 µW
* This output is the value measured at a
distance of 200 mm from the objective lens
surface on the Optical Pick-up Block with
7 mm aperture.
Adaptive TRansform Acoustic Coding
EFM (Eight to Fourteen Modulation)
Number of channels
2 stereo channels
Input signal : 1Vp-p
Y/C INPUT, Mini DIN 4-pin
Luminance signal : 1Vp-p
Chrominance signal : 0.286 Vp-p
AUDIO IN (L/R)
Input level : 2 Vrms (full bit)
Input impedance : more than 47 k
FS1/FS2 (RED/WHITE) connectors
Output signal : 1 Vp-p
Y/C OUTPUT, Mini DIN 4-pin
Luminance signal : 1 Vp-p
Chrominance signal : 0.286 Vp-p
AUDIO OUT (L/R)
Output level : 2 Vrms (full bit)
Output impedance : more than 47 k
-- 2 --
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON 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 IDENTIFÉS PAR UNE MARQUE ! SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, "metallized" knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The "limit" indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
To Exposed Metal
Parts on Set
Fig. A. Using an AC voltmeter to check AC leakage.
Sony AC Power Adaptor AC-DA300
(supplied) connected at the DC IN 12 V
jack : 120V AC, 60Hz (US model)
°C to 35 °C (41°F to 95°F)
30% to 85%
× 80 × 290 mm
× 31/4 × 111/2 inches)
(w/h/d, including projecting parts and
Approx. 2.5 kg (5 lb. 8 oz)
AC power adaptor AC-DA300
Remote commander RMT-DA300 (1)
Size AA (R6) batteries (2)
Design and specifications are subject to change without notice.
Notes on chip component replacement
· Never reuse a disconnected chip component.
· Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
· Keep the temperature of soldering iron around 270°C
· 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
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
Discard used batteries according to the manufacturer's instructions.
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous
-- 3 --
TABLE OF CONTENTS
1. SERVICING NOTE ·························································· 4
2. GENERAL ·········································································· 7
Upper Case ································································· 11
Front Panel, Panel Board and Video In Board ··········· 11
Picture Board, Power Board and Mechanism Deck
MD Mechanism Deck ················································ 13
Slider (MD Mechanism) ············································ 13
MD Base Unit (MBU-2) and Loading Motor Assy ··· 14
How to Attach the Slider (MD Mechanism) ·············· 14
4. TEST MODE ···································································· 15
5. ELECTRICAL ADJUSTMENTS ······························· 18
Circuit Board Location ··············································· 28
Block Diagram -- BD Section -- ······························ 29
Block Diagram -- MD Control Section -- ··············· 31
Block Diagram -- Video Control Section -- ············ 33
Block Diagram -- Video Process Section -- ············ 35
Block Diagram -- IR Section -- ······························· 37
Block Diagram -- Video Out Section -- ··················· 39
Block Diagram -- Video In Section -- ····················· 41
Block Diagram -- Audio Section -- ························· 43
6-10. Block Diagram -- Power Section -- ························· 45
6-11. Printed Wiring Board -- Picture Section -- ·············· 47
6-12. Schematic Diagram -- Picture Section (1/3) -- ········ 51
6-13. Schematic Diagram -- Picture Section (2/3) -- ········ 55
6-14. Schematic Diagram -- Picture Section (3/3) -- ········ 59
6-15. Printed Wiring Board -- BD Section -- ···················· 62
6-16. Schematic Diagram -- BD Section -- ······················ 65
6-17. Schematic Diagram -- Video In Section -- ·············· 69
6-18. Printed Wiring Board -- Video In Section -- ··········· 73
6-19. Printed Wirimg Board -- MD Section -- ·················· 77
6-20. Schematic Diagram -- MD Section (1/2) -- ············· 81
6-21. Schematic Diagram -- MD Section (2/2) -- ············· 85
6-22. Printed Wiring Board -- Power Section -- ··············· 89
6-23. Schematic Diagram -- Power Section -- ·················· 91
6-24. Printed Wiring Board -- Panel Section -- ················ 94
6-25. Schematic Diagram -- Panel Section -- ··················· 97
6-26. IC Block Diagrams ····················································· 99
6-27. IC Pin Function ························································ 111
7. EXPLODED VIEWS
Upper Case Section ·················································· 144
Front Panel Section ·················································· 145
Bottom Cabinet Section ··········································· 146
Mechanism Section (MDM-2BR) ···························· 147
Base Unit Section (MBU-2) ····································· 148
ELECTRICAL PARTS LIST ································· 149
-- 4 --
[About Switches on POWER Board]
· Backup Power ON/OFF Switch (S1351 B. UP ON)
Be sure to turn this switch to OFF when removing and inserting connectors to and from the circuit boards.
This switch protects semiconductors from breakdown due to static electricity.
Set this switch to ON during normal operation. The DPA-300 does not work unless this switch is set to ON.
· Reset Switch (S1352 RESET)
This switch resets forcibly system of DPA-300. Press the reset switch when microprocessor runs away, or when DPA-300 does not
operate normally, or when the main power is desired to turn ON, OFF and back ON momentarily during test mode, etc.
-- 5 --
[How to Set the Mode Displaying the Through Picture]
Input the color bar signal and enter this mode as follows to check
the DPA-300 for voltages, waveforms and to implement a part of
When the equipment connection is completed, set up this mode by
following the procedures in the order given below.
1. Turn the main power ON. (Turn on the main power of color
bar generator, DPA-300 and monitor.)
2. Connect the color bar signal to video input.
Color bar signal specifications to be input
Color bar signal for voltage and waveform measurement
Color bar signal for adjustment
3. Insert the MD data disc.
List of album appears.
When the MD data disc has not been formatted, format it.
4. Select "Load" using the f F g G button and press the ENTER
The message "Create new album
and add photos?" appears.
5. Select "Yes" using the f F g G button and press the ENTER
The new album to load the pictures
are created. When an album is
created, the loading menu appears.
6. Select "Video input" using the g G button and press the ENTER
The display from which the modes
can be selected, appears
7. Select "Frame" using the g G button and press the ENTER
Mode differs depending on the type
of input signal supplied from the
video equipment connected.
8. Select "OK" using the f F g G button and press the ENTER
9. Color bars supplied to the Video Input connector, appear on
monitor when the ENTER button is pressed.
Note : When the ENTER button is pressed in the state of step 9, the
picture is loaded and the DPA-300 exits the Through mode.
When the ENTER button is pressed incorrectly, follow the
instruction shown on the monitor screen and return to the
state of step 9.
Color bar generator
Video Input or