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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
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