Sony DVCAM DSR-25 User manual

SERVICE MANUAL
AUDIO Phono jack
Output level: 2 Vrms (full bit) (47
kohms, unbalanced)
Output impedance: less than
10 kohms
PHONES Stereo minijack, 8 ohms loading
Remote control
CONTROL S IN Stereo minijack
LANC Stereo mini-minijack
LCD screen
Picture 5.1 cm (2 type)
Total dot number 123 200 (560 ×220)
General
Power requirements100 to 240 V AC, 50/60 Hz
Power consumption16W (during playback)
Operating temperature
5 °C to 40 °C (41 °F to 104 °F)
Storage temperature
–20 °C to +60 °C
(–4 °F to +140 °F)
System
Recording format DVCAM/DV (SP) format, rotating
2-head helical scan, digital
component recording
Video signal EIA STANDARD, NTSC color
system
CCIR STANDARD, PAL colour
system
Video
Quantization 8-bit
Sampling frequency
NTSC:
13.5 MHz (4:1:1 Component)
PAL:
13.5 MHz (4:2:0 Component)
Audio
Quantization 12-bit (non-linear) or 16-bit
(linear)
Sampling frequency
32 kHz (12-bit recording) or
48 kHz (16-bit recording)
Usable cassettes Standard-DVCAM cassettes and
Mini-DVCAM cassettes
Recording time Standard cassette
DVCAM:
184 minutes (PDV184)
180 minutes (DV270)
DV: 270 minutes (PDV184/
DV270)
Mini cassette
DVCAM: 40 minutes (PDVM40/
DVM60)
DV: 60 minutes (PDVM40/
DVM60)
(We recommend that you use
DVCAM cassettes.)
Clock
System Quartz locked, digital display
Power back-up Back-up duration: up to two weeks
(after an 8-hour charge)
Inputs
VIDEO BNC type, 1 Vp-p (75 ohms,
unbalanced)
S VIDEO Mini DIN 4-pin
Luminance signal: 1 Vp-p
(75 ohms, unbalanced)
Chrominance signal:
0.286 Vp-p (NTSC)
(75 ohms unbalanced)
0.3 Vp-p (PAL)
(75 ohms unbalanced)
AUDIO Phono jack, –10/–2/+4 dBu,
Impedance more than 47 kohms,
unbalanced
Maximum input level:
–10:+18 dBu (about 6 Vrms)
–2: +24 dBu (about 12.5 Vrms)
+4: +30 dBu (about 25 Vrms)
DV IN/OUT 4-pin jack (i.LINK)
Outputs
VIDEO BNC type, 1 Vp-p (75 ohms,
unbalanced)
S VIDEO Mini DIN 4-pin
Luminance signal: 1.0 Vp-p
(75 ohms, unbalanced)
Chrominance signal:
0.286 Vp-p (NTSC)
(75 ohms unbalanced)
0.3 Vp-p (PAL)
(75 ohms, unbalanced)
SPECIFICATIONS
– Continued on next page –
DSR-25
RMT-DS5
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
New Zealand Model
R MECHANISM
Ver 1.1 2003. 05
DIGITAL VIDEO CASSETTE RECORDER

– 2 –
DSR-25
Dimensions Approx. 212 ×98 ×392.8 mm
(8 3/8×3 7/8×15 1/2inches)
(w/h/d, including projecting parts
and controls)
Unit: mm (inches)
175 (7)
212 (8
3
/ 8 )
392.8 (15
1
/
2
)
88 (3
1
/
2
)10 (
13
/
32
)11.2 (
15
/
32
)
284 (11
1
/
4
)
Mass Approx. 4.3 kg (9 lb. 8 oz.)
Supplied accessories
Remote Commander (1)
AC power cord (1)
Size AA batteries (2)
Cleaning cassette (1)
Operating instructions
Design and specifications are subject to change
without notice.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT 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 PUB-
LISHED BY SONY.
CAUTION
Dangerofexplosionifbattery is incorrectly replaced.
Replace only with the same or eqivalent type.

– 3 –
DSR-25
LEAKAGETEST
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.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers' instructions to use these
instruments.
2. A battery-operatedAC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2VAC range are suit-
able. (See Fig. A)
Fig. A Using AC voltmeter to check AC leakage
1.5 k Ω 0.15 µFAC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
1. Check the area of your repair for unsoldered or poorly-sol-
dered connections. Check the entire board surface for solder
splashes 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 transis-
tors, 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 recom-
mend their replacement.
5. Check the line cord for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
6. Check the B+ voltage to see it is at the values specified.
7. Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
SAFETY CHECK-OUT
(US Model only)
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
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.

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DSR-25
TABLE OF CONTENTS
Section Title Page Section Title Page
SERVICE NOTE................................................................ 7
1. Note for Repair ............................................................ 7
SELF-DIAGNOSIS FUNCTION ..................................... 8
1. Self-diagnosis Function............................................... 8
2. Self-diagnosis Display................................................. 8
3. Service Mode Display ................................................. 8
4. Self-diagnosis Code Table .......................................... 9
1. GENERAL
Features ................................................................................ 1-1
Location and Function of Parts ............................................. 1-1
Displaying Various Data ........................................................ 1-5
Notes on Video Cassettes..................................................... 1-6
Playback ................................................................................ 1-6
Recording .............................................................................. 1-8
Setting the Time Code and User Bits.................................... 1-10
Duplication (Generating a Work Tape
with the Same Time Code).................................................... 1-11
Audio Dubbing ....................................................................... 1-12
Operating the Menus ............................................................. 1-13
Troubleshooting ..................................................................... 1-16
Alarm Messages.................................................................... 1-17
Notes on Use......................................................................... 1-17
2. DISASSEMBLY
2-1. Upper Case, Bottom Plate .......................................... 2-1
2-2. Front Panel Block Assembly ....................................... 2-1
2-3. FR-183/DL062 Boards ................................................ 2-2
2-4. LCD Module (LCD901)................................................ 2-2
2-5. Mechanism Deck......................................................... 2-3
2-6. CM-59 Board ............................................................... 2-3
2-7. JC-21 Board ................................................................ 2-4
2-8. VD-032 Board.............................................................. 2-4
2-9. Rear Panel Block Assembly ........................................ 2-5
2-10. Circuit Boards Location-1............................................ 2-6
2-11. Circuit Boards Location-2............................................ 2-7
3. BLOCK DIAGRAMS
3-1. Overall Block Diagram 1.............................................. 3-1
3-2. Overall Block Diagram 2.............................................. 3-3
3-3. Overall Block Diagram 3.............................................. 3-5
3-4. Overall Block Diagram 4.............................................. 3-7
3-5. Overall Block Diagram 5.............................................. 3-9
3-6. Overall Block Diagram 6.............................................. 3-11
3-7. Power Block Diagram 1 ............................................... 3-13
3-8. Power Block Diagram 2 ............................................... 3-15
3-9. Power Block Diagram 3 ............................................... 3-17
3-10. Power Block Diagram 4............................................... 3-19
4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ..................................... 4-1
4-1. Frame Schematic Diagram (1/2) ................................. 4-3
Frame Schematic Diagram (2/2) ................................. 4-5
4-2. Schematic Diagrams ................................................... 4-7
•RP-234 (1/2)(REC/PB AMP 1)............................... 4-7
•RP-234 (2/2)(REC/PB AMP 2)............................... 4-9
•JC-21(1/14) (VIDEO PB AMP)............................... 4-11
•JC-21(2/14) (VIDEO A/D CONVERTER)............... 4-13
•JC-21(3/14) (CHROMA MIX) ................................. 4-15
•JC-21(4/14) (AFC).................................................. 4-17
•JC-21(5/14)
(VFD (VIDEO DSP, D/A CONVERTER)) ............... 4-19
•JC-21(6/14) (SFD).................................................. 4-21
•JC-21(7/14) (TFD).................................................. 4-23
•JC-21(8/14) (DV INTERFACE)............................... 4-25
•JC-21(9/14) (MECHANISM CONTROL 1)............. 4-27
•JC-21(10/14) (MECHANISM CONTROL 2)........... 4-29
•JC-21(11/14) (MODE CONTROL) ......................... 4-31
•JC-21(12/14) (AUDIO 1) ........................................ 4-33
•JC-21(13/14) (AUDIO 2) ........................................ 4-35
•JC-21(14/14) (POWER SUPPLY) .......................... 4-37
•VD-032 (1/16) (SYNC GENERATOR 1) ................ 4-39
•VD-032 (2/16) (SYNC GENERATOR 2) ................ 4-41
•VD-032 (3/16) (SYNC GENERATOR 3) ................ 4-43
•VD-032 (4/16) (VIDEO IN 1) .................................. 4-45
•VD-032 (5/16) (VIDEO IN 2) .................................. 4-47
•VD-032 (6/16) (VIDEO IN 3) .................................. 4-49
•VD-032 (7/16) (UVIC) ............................................ 4-51
•VD-032 (8/16) (VIDEO OUT 1) .............................. 4-53
•VD-032 (9/16) (VIDEO OUT 2) .............................. 4-55
•VD-032 (10/16) (VIDEO OUT 3) ........................... 4-57
•VD-032 (11/16) (AUDIO)........................................ 4-59
•VD-032 (12/16) (HI CONTROL)............................. 4-61
•VD-032 (13/16) (RS-232C/422 CONTROL) .......... 4-63
•VD-032 (14/16) (DC IN) ......................................... 4-65
•VD-032 (15/16) (DC/DC CONVERTER 1)............. 4-67
•VD-032 (16/16) (DC/DC CONVERTER 2)............. 4-69
•CM-59 (1/3) (DC/DC CONVERTER,
REEL MOTOR DRIVE) .......................................... 4-71
•CM-59 (2/3) (DRUM MOTOR DRIVE,
FL MOTOR DRIVE)................................................ 4-73
•CM-59 (3/3) (CAPSTAN MOTOR DRIVE,
CAM MOTOR DRIVE) ............................................ 4-75
•MD-76 (TAPE SENSOR)........................................ 4-77
•CK-107 (EJECTION DETECT SWITCH)/
DL-062 (REMOTE CONTROL RECEIVER) .......... 4-79
•FC-087 (FRONT DOOR DETECT SWITCH)/
FM-037 (FRONT DOOR MOTOR) ......................... 4-80
•FR-183 (USER CONTROL) ................................... 4-81
•HP-135 (HEAD PHONE)........................................ 4-83
•PD-170 (1/2) (RGB DRIVER)................................. 4-85
•PD-170 (2/2) (TIMING GENERATOR)................... 4-87
•JK-216 (VIDEO/AUDIO IN/OUT) ........................... 4-89
•NP-002 (NTSC/PAL SELECT) ............................... 4-91
•DV-032 (DV CONNECTOR)/
LS-060 (CONTROL JACK) .................................... 4-92
•ACS1581-MA (POWER) ........................................ 4-93
4-3. Printed Wiring Boards ................................................. 4-95
•RP-234 ................................................................... 4-95
•JC-21 ...................................................................... 4-99
•VD-032 ................................................................... 4-103
•CM-59..................................................................... 4-107
•MD-76..................................................................... 4-111
•CK-107/DL-062 ...................................................... 4-113
•FC-087/FM-037 ...................................................... 4-114
•FR-183.................................................................... 4-115
•HP-135 ................................................................... 4-119
•PD-170 ................................................................... 4-121
•JK-216 .................................................................... 4-123
•NP-002/DV-032 ...................................................... 4-127
•LS-060 .................................................................... 4-128
•ACS1581-MA.......................................................... 4-129
4-4. Waveforms................................................................... 4-133
4-5. Parts Location ............................................................. 4-146
5. ADJUSTMENTS
1. Before Starting Adjustment ......................................... 5-1
1-1. Adjusting Items when Replacing Main Parts
and Boards .................................................................. 5-2
1-2. Information (Mechanical Section) ............................... 5-4
5-1. MECHANICAL SECTION ADJUSTMENTS................ 5-5
5-1-1. Parts Replacement and Preparation
for Adjustment ........................................................ 5-5
1-1. Assembly/disassembly of Cassette Compartment ..... 5-5

– 5 –
DSR-25
Section Title Page Section Title Page
1-2. How To Load/unload.................................................... 5-5
1-3. List of Service Tools .................................................... 5-6
1-4. About Mode Selector II ............................................... 5-7
5-1-2. Periodic Check ....................................................... 5-8
2-1. Cleaning of Rotary Drum Assembly ...................... 5-8
2-2. Cleaning of Tape Path System............................... 5-8
2-3. Periodic Checks ..................................................... 5-8
5-1-3. Parts Replacement................................................. 5-9
3-1. Tape Guide 1/8 and Guide Guard.......................... 5-9
3-2. Tape Guide 2/7 ....................................................... 5-9
3-3. Capstan Cover ....................................................... 5-10
3-4. Reel Motor .............................................................. 5-10
3-5. FL Motor Assembly, Gear A, Gear B and
Gear CD Assembly ................................................ 5-10
3-6. GL Arm S Assembly, GL Arm T Assembly,
Coaster S Assembly and Coaster T Assembly...... 5-11
3-7. MIC Base Guide, MIC Base Assembly and
MIC Base Spring .................................................... 5-12
3-8. Drum Cap, Drum Assembly and Tape Support ..... 5-12
3-9. Pinch Arm Assembly .............................................. 5-13
3-10. Capstan Motor........................................................ 5-13
3-11. Pendulum Retainer and
Pendulum Arm Assembly....................................... 5-13
3-12. Brake Arm S, Ratchet BrakeT,
Tension Coil Spring (Brake), SBR Slider and FP-248
Flexible Board (Condensation Sensor).................. 5-14
3-13. Reel Table Assembly, Idler Gear A Assembly
and Idler Gear B..................................................... 5-14
3-14. Reel Base Retainer, Reel Base T Assembly and
Reel Base S Assembly (Reel Lock Release Block
and Reel Lock Release Spring) ............................. 5-15
3-15. Cam Motor, Motor Holder....................................... 5-15
3-16. TG2/7 Arm Block,TG2/7 Band Block and
Tension Coil Spring (TG2)/(TG7) ........................... 5-16
3-17. Sub-slider Arm, Sub-slider, Encoder Gear,
Main Cam Gear, Coupling Gear, Sub-cam Gear,
Pinch Slider and Loading Arm Assy ...................... 5-17
3-18. Main Slider, Main Slider Arm and Pendulum
Stopper Assembly .................................................. 5-19
3-19. MD-76 Board and Encoder Retainer ..................... 5-20
3-20. Components of GL Arm S/T Assembly
(GL Arm Assembly, GL Helical Torsion Spring,
GL Gear)................................................................. 5-21
3-21. Components of MIC Base Assembly
(FP-104 Flexible Board, MIC Base)....................... 5-21
3-22. Components of Drum Assembly
(Motor FPC Assembly, Elastic Connector) ............ 5-22
3-23. Components of Pinch Arm Assembly
(Tape Retainer, Compression Coil Spring) ............ 5-22
3-24. Components of TG2/7 Arm Assembly
(ET Magnet, Magnet Holder) ................................. 5-22
5-1-4. Check and Adjustment ........................................... 5-23
4-1. Reel Table Height Check and Adjustment ............. 5-24
4-2. TG1/8 Height Check and Adjustment .................... 5-24
4-3. TG2/7 Height Check and Adjustment .................... 5-25
4-4. FWD/RVS Position Check and Adjustment ........... 5-25
4-5. Electric Tension Regulator Check and Adjustment
of TG2/7 Arm.......................................................... 5-26
4-6. FWD/RVS Back Tension Check and Adjustment... 5-27
4-7. Preparation for Adjustment and
Tape Path Check .................................................... 5-28
4-8. Track Adjustment and Check
(Checking the RF Waveform)................................. 5-29
4-9. Track Check............................................................ 5-29
4-10. CUE/REV Check .................................................... 5-30
4-11. Curl Check and Adjustment ................................... 5-30
4-12. Rising Check .......................................................... 5-31
5-2. SERVICE MODE ......................................................... 5-32
5-2-1. Adjusting Remote Commander.............................. 5-32
1. Used Adjustment Remote Commander................. 5-32
2. Precautions Upon Using the Adjusting Remote
Commander............................................................ 5-32
5-2-2. Data Processing..................................................... 5-33
5-2-3. Service Mode ......................................................... 5-34
1. Emergence Memory Address ................................ 5-34
2. EMG Code (Emergency Code) .............................. 5-34
3. MSW Code ............................................................. 5-35
4. Bit Value Discriminatiion ........................................ 5-36
5. Recorde of Use Check ........................................... 5-37
6. LED Check ............................................................. 5-38
7. Switch Check (1) .................................................... 5-39
8. Switch Check (2) .................................................... 5-39
9. Switch Check (3) .................................................... 5-39
10. Switch Check (4) .................................................... 5-40
11. Switch Check (5) .................................................... 5-40
12. Switch Check (6) .................................................... 5-40
5-3. VIDEO SECTION ADJUSTMENTS ............................ 5-41
3-1. Preparations Before Adjustment ............................ 5-41
3-1-1. Equipment Used..................................................... 5-41
3-1-2. Connection of Equipment....................................... 5-42
3-1-3. Checking the Input Signals .................................... 5-43
1. S VIDEO Input ........................................................ 5-43
2. VIDEO Input ........................................................... 5-43
3-1-4. Adjustment Tapes ................................................... 5-44
3-1-5. Input/output Level and Impedance ........................ 5-45
3-2. System Control System Adjustments .................... 5-46
1. Initializing the C, D, E Page Data........................... 5-46
2. Input of C Page Initial Data.................................... 5-46
3. Input of D Page Initial Data.................................... 5-46
4. Input of E Page Initial Data .................................... 5-46
5. Modification of C, D, E, Page Data ........................ 5-46
6. C Page Table .......................................................... 5-47
7. D Page Table .......................................................... 5-48
8. E Page Table .......................................................... 5-48
9. Node Unique ID No. Input ...................................... 5-50
3-3. Servo and RF System Adjustments....................... 5-52
1. Capstan FG Adjustment (CM-59 Board) ............... 5-52
2. PLL f0Pre-adjustment (RP-234 Board) ................. 5-52
3. Switching Position Adjustment (RP-234 Board) .... 5-52
4. RF-AGC Adjustment (RP-234 Board).................... 5-52
5. CLK DELAY and AEQ Adjustment
(RP-234 Board) ...................................................... 5-53
6. PLL f0Final Adjustment (RP-234 Board)............... 5-53
3-4. Video System Adjustments .................................... 5-53
3-4-1. JC-21 Board Adjustment........................................ 5-53
1. VFD SPCK Adjustment (JC-21 Board) .................. 5-53
2. A/D Converter Reference Voltage
Adjustment (1) (JC-21 Board)................................ 5-53
3. A/D Converter Reference Voltage
Adjustment (2) (JC-21 Board)................................ 5-53
4. Y Signal Clamp Reference Voltage Adjustment
(JC-21 Board)......................................................... 5-54
5. CR Signal Clamp ReferenceVoltage Adjustment
(JC-21 Board)......................................................... 5-54
6. CB Signal Clamp Reference Voltage Adjustment
(JC-21 Board)......................................................... 5-54
7. AFC Preliminary Adjustment (JC-21 Board) ......... 5-54
8. AFC Picture Frame Adjustment (JC-21 Board) ..... 5-54
9. AFC Adjustment (JC-21 Board) ............................. 5-54
10. PlaybackY Level Adjustment (JC-21 Board)......... 5-55
11. Playback C Level Adjustment (JC-21 Board) ........ 5-55
3-4-2. General Adjustment ............................................... 5-56
1. Video Terminal Output Level Adjudtment
(JC-21 Board)......................................................... 5-56
2. S-Video Output Level Check (VD-032 Board) ....... 5-57
3. Decoder Free Run Adjustment (VD-032 Board).... 5-58
4. Decoder HUE Adjustment (VD-032 Board) ........... 5-58
5. S-Video E-E Level Adjustment
(VD-032 Board) ...................................................... 5-59
6. Video E-E Level Adjustment
(VD-032 Board) ...................................................... 5-60
3-5. LCD System Adjustments ...................................... 5-61
1. VCO Adjustment (PD-170 Board).......................... 5-61
2. D Range Adjustment (PD-170 Board) ................... 5-62
3. Bright Adjustment (PD-170 Board) ........................ 5-62
4. Contrast Adjustment (PD-170 Board).................... 5-63

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DSR-25
Section Title Page
5. Color Adjustment (PD-170 Board)......................... 5-63
6. V-COM Level Adjustment (PD-170 Board) ............ 5-64
7. V-COM Adjustment (PD-170 Board)...................... 5-64
8. White Balance Adjustment (PD-170 Board) .......... 5-65
3-6. AUDIO System Adjustments .................................. 5-66
1. Playing Level Check............................................... 5-67
2. E-E Level Check..................................................... 5-67
3. E-E Maximum Input Check .................................... 5-68
4. Frequency Characteristic Check............................ 5-69
5. E-E Noise Level Check .......................................... 5-70
6. Distortion Check..................................................... 5-70
7. HEAD PHONE Check ............................................ 5-71
3-7. Arrangement Diagram for Adjustment Parts.......... 5-72
6. REPAIR PARTS LIST
6-1. EXPLODED VIEWS .................................................... 6-1
6-1-1. Overall Assembly ................................................... 6-1
6-1-2. Front Panel Assembly ............................................ 6-2
6-1-3. Rear Panel Assembly............................................. 6-3
6-1-4. Main Frame Assembly............................................ 6-4
6-1-5. CMX Block Assembly ............................................. 6-5
6-1-6. Mechanism Deck Assembly (Drum Assembly)...... 6-6
6-1-7. Mechanism Deck Assembly (Gear, Arm)............... 6-7
6-1-8. Mechanism Deck Assembly (Motor, MD Board).... 6-8
6-1-9. Mechanism Deck Assembly
(Cassette Compartment) ....................................... 6-9
6-2. ELECTRICAL PARTS LIST ......................................... 6-10
Hardware List ........................................................................ 6-38

– 7 –
DSR-25
1. NOTE FOR REPAIR
Make sure that the flat cable and flexible board are not cracked of
bent at the terminal.
Do not insert the cable insufficiently nor crookedly.
When remove a connector, don’t pull at wire of connector.
It is possible that a wire is snapped.
Cut and remove the part of gilt
which comes off at the point.
(Be careful or some pieces of
gilt may be left inside)
When installing a connector, don’t press down at wire of connector.
It is possible that a wire is snapped.
SERVICE NOTE
Do not fold down a flat cable at the edge of the inforcing board
which is the reverse side of pins when the flat cable is connected
to a connector.
If the flat cable is folded at that point, it may be a cause of
breaking of foil inside of the cable.

– 8 –
DSR-25
SELF-DIAGNOSIS FUNCTION
1. Self-diagnosis Function
When problems occur while the unit is operating, the self-diagno-
sis function starts working, and displays on the LCD monitor what
to do. This function consists of two display; self-diagnosis display
and service mode display.
Details of the self-diagnosis functions are provided in the Instruc-
tion manual.
Note: The “self-diagnosis display”data will be backed up by the coin-type lithium battery (VD-032 board BT701).When this
coin-type lithium battery is disconnected, the “self-diagnosis display” data will be lost by initialization.
2. Self-diagnosis Display
When problems occur while the unit is operating, the time code of
the LCD monitor shows a 4-digit display consisting of an alpha-
bet and numbers, which blinks at 3.2 Hz. This 5-character display
indicates the “repaired by:”, “block” in which the problem oc-
curred, and “detailed code” of the problem.
3. Service Mode Display
The service mode display shows up to six self-diagnosis codes shown in the past.
3-1. Display Method
Set the “DISPLAY SELECT” switch to “DATA”, turn on the power by the “POWER” switch while pressing the “STOP” key, and continue
pressing the “STOP” key for 5 seconds continuously. The service mode will be displayed, and the time code will show the backup No. and
the 5-character self-diagnosis codes.
3-2. Switching of Backup No.
By pressing the “F” or “f” key, past self-diagnosis codes will be shown in order. The backup No. in the [] indicates the order in which the
problem occurred. (If the number of problems which occurred is less than 6, only the number of problems which occurred will be shown.)
[1] : Occurred first time [4] : Occurred fourth time
[2] : Occurred second time [5] : Occurred fifth time
[3] : Occurred third time [6] : Occurred the last time
3-3. End of Display
Turning OFF the power supply will end the service mode display.
Order of previous errors
Backup No. Self-diagnosis Codes
C : 3 1 : 1 1
[3]
Lights up
LCD monitor
[3] C : 3 1 : 1 1
1 1
3 1C
Repaired by:
Refer to page 9.
Self-diagnosis Code Table.
Indicates the appropriate
step to be taken.
E.g.
31 ....Reload the tape.
32 ....Turn on power again.
Block Detailed Code
Blinks at 3.2Hz
C : Corrected by customer
H : Corrected by dealer
E : Corrected by service
engineer
LCD monitor
C : 3 1 : 1 1

– 9 –
DSR-25
4. Self-diagnosis CodeTable
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
Block
Function
21
22
31
31
31
31
31
31
31
32
32
32
32
32
32
32
Detailed
Code
00
00
10
11
22
23
30
40
42
10
11
22
23
30
40
42
Symptom/State
Condensation.
Video head is dirty.
LOAD direction. Loading does not
complete within specified time
UNLOAD direction. Loading does not
complete within specified time
T reel fault.
S reel fault.
FG fault when starting capstan.
FG fault when starting drum.
FG fault during normal drum operations.
LOAD direction loading motor time-
out.
UNLOAD direction loading motor
time-out.
T reel fault.
S reel fault.
FG fault when starting capstan.
FG fault when starting drum.
FG fault during normal drum
operations.
Self-diagnosis Code
Repaired by:
Correction
Remove the cassette, and insert it again after one hour.
Clean with the optional cleaning cassette.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Load the tape again, and perform operations from the beginning.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.
Disconnect the AC power cord.
After reconnecting it, operate the unit.

1-1
DSR-25
Chapter 1 Overview 7 (GB)
Chapter 1 Overview
DV format compatibility
The unit can perform recording and playback in the
DV-format (SP mode only). (Recording/playing an
image in LP mode is not available.)
NTSC/PAL systems compatible
The unit is compatible with NTSC and PAL systems.
With DV connection or in the playback mode, the
color system of signals is detected automatically. The
color system select switch on the unit allows input of
analog video signals in either color system. This
compatibility allows you to record (download) or play
back (upload) both NTSC and PAL formatted signals
with your VCR, computer, or other equipment.
However, the unit cannot convert the color system of
the signals.
Choice of two cassette sizes
The unit can use both standard-size and mini-size
DVCAM/DV cassettes.
•According to cassette size, the position of the reel
drive plates automatically changes.
•The maximum recording/playback times are 184
minutes for standard size cassettes and 40 minutes for
mini-size cassettes (DVCAM format).
Remote control
The unit can be operated by remote control from the
CONTROL S system Remote Control Unit (DSRM-
20, not supplied).
High-speed search function
If you use the Remote Control Unit (DSRM-20, not
supplied), the unit has a picture search function that
allows you to view color pictures at playback speeds
up to 14 times normal speed (NTSC) or up to 17 times
normal speed (PAL) in both forward and reverse
directions.
You can also search frame-by-frame in jog mode.
While searching for scenes, you can also hear playback
audio.
Digital slow playback
The unit has a frame memory function that allows slow
playback without noise. This is available only at +
1
/ 3 -
time speed and –
1
/ 3 -time speed.
Time code and user bits
On this unit, you can use time code and user bits.
Using the menu, these can be set easily.
Jog audio function
If you use the Remote Control Unit (DSRM-20, not
supplied), audio can be monitored at various playback
speeds when in jog mode.
Other Features
Built-in color LCD monitor
The unit has a 2-type color LCD (liquid crystal
display) monitor that lets you verify images on the
spot. You can see the setup menus, audio levels, and
system statuses. Menus and data can be superimposed
over the picture being displayed.
Duplicate, including cassette memory data
Using an i.LINK cable, you can duplicate a tape that
includes time code and cassette memory data, etc. If
the original tape has blank portions, you can duplicate
the tape skipping those portions.
Audio dubbing function
The unit allows you to record just the sound onto the
recorded tape (audio dubbing). (To dub sounds, you
are allowed to use only channel 3 and 4 of the tape
recorded in DVCAM format, the audio mode of which
is 32 kHz.)
SECTION 1
GENERAL Thissectionis extracted fromDSR-
25 instruction manual.
6 (GB) Chapter 1 Overview
Features
Chapter 1 Overview
Chapter 1
Overview
Features
The DSR-25 is a digital videocassette recorder using
1/4-inch tape. Offering the DVCAM™ digital recording
format, the DSR-25 produces stable, superior picture
quality by digitally processing and separating image
signals into color difference signals and a luminance
signal (component video). The DSR-25 can handle
both NTSC and PAL color systems and is equipped
with an analog interface as well as a digital interface
enabling connection to a digital device such as a
computer. The built-in color LCD monitor lets you
check images easily.
The main features of the DSR-25 are described below.
DVCAM Format
DVCAM is based on the consumer DV format,
which uses the 4:1:1 component digital format
(NTSC) or the 4:2:0 format (PAL), and
provides a 1/4-inch digital recording format for
professional use.
For details, see “Compatibility of DVCAM and DV Format”
on page 76 (GB).
High picture quality, high stability
Video signals are separated into color difference
signals and a luminance signal, which are encoded and
compressed to one-fifth size before being recorded to
ensure stable and superb picture quality.
Because the recording is digital, multi-generation
digital dubbing can be performed with virtually no
deterioration of quality.
Wide track pitch
The recording track pitch is about 15 µm, fully 50
percent wider than the DV format’s 10 µm track pitch.
Thanks to this feature, the DVCAM format fully meets
the reliability and precision requirements of
professional editing.
High-quality PCM digital audio
PCM recording makes for a wide dynamic range and a
high signal-to-noise ratio, thereby enhancing sound
quality.
There are two recording modes: 2-channel mode (48
kHz sampling and 16 bit linear code), which offers
sound quality equivalent to the DAT (Digital Audio
Tape) format, or 4-channel mode (32 kHz sampling
and 12 bit nonlinear code).
8 (GB) Chapter 1 Overview
Features
Chapter 1 Overview
Menu system for functionality and
operation settings
The unit provides a menu system to make its various
functions easier to use and set up.
Superimposition function
Time code, warnings, menus, and other text data can
be output as analog video signals and can be
superimposed on the image output to the LCD
monitor.
Easy maintenance functions
• Self-diagnostics/alarm functions: The system
automatically detects an invalid operation, an invalid
connection or a malfunction, and displays a
description, a cause and a recovery method on the
LCD monitor and outputs the data as analog video
signals.
• Digital hours meter: A digital hours meter counts
four types of time data—operating time, drum
rotation time, tape running time, and tape threading/
unthreading. The digital hours data are indicated on
the menu.
......................................................................................
, , and are trademarks of Sony
Corporation.
Chapter 1 Overview 9 (GB)
Chapter 1 Overview
Location and Function of Parts
1Cassette compartment
Insert a standard-size or mini-size DVCAM cassette.
To open or close the compartment, press the EJECT
button qa.
For details of cassettes that can be used, see “Notes on
Video Cassettes” on page 26 (GB).
2KEY INH (key inhibit) switch
Turning on this switch disables all of buttons to
prevent accidental button operations.
Notes
•In addition to the Remote Commander supplied with
the unit, the unit accepts signals from any Sony
Remote Commander whose command mode is set to
VTR4. If you want to disable the control from any
Remote Commander, set COMMANDER on the
OTHERS menu to CONTROL S.
•The TIMER selector 4setting has a higher priority
than this switch setting.
•When this switch is set to ON, the ON/STANDBY
switch 3does not work. To enable the ON/
STANDBY switch, set this switch to OFF.
Front Panel
3ON/STANDBY switch and lamp
Press this switch to turn the unit on. The ON/
STANDBY lamp lights up in green. When you press
this switch again, the unit goes into the standby mode
and the lamp lights up in red.
Note
When the KEY INH switch is set to ON, this switch
does not work. To enable this switch, set the KEY INH
switch to OFF.
4TIMER selector
Use to select Auto Repeat or recording using an
external AC timer (not supplied).
REPEAT: Whenever the power is connected to this
unit, a tape rewinds to its beginning automatically
and playback starts. The unit repeats the playback
from the beginning to the first index (if there is no
index on the tape, to an unrecorded portion; if there
is no unrecorded portion, to the end of the tape).
Auto Repeat also functions if you set this selector
to REPEAT during playback or rewinding.
For details on Auto Repeat, see “Automatically playing
back a tape repeatedly (Auto Repeat)” on page 35
(GB).
1
CH-
1/2
MIN MAX
CH-
3/4
CH-2
(DUB CH-4)
CH-1
(DUB CH-3)
NTSC
PAL
DSR-25
VARFIX
ON OFF
AUDIO OUTPUT
SELECT
KEY INH
2Tape transport control
section
(see page 13 (GB))
3Audio control section
(see page 15 (GB))
4Display window
(see page 16 (GB))
7PHONES jack
8RESET button
0INPUT SELECT
selector
1Cassette compartment
1Monitor display section
(see page 11 (GB))
2KEY INH switch
5AUDIO OUTPUT
SELECT selector
9CHARACTER DISPLAY switch
6PHONE LEVEL
control knob
3ON/STANDBY
switch and
lamp
4TIMER selector
qa EJECT button
(Continued)