Sony DSR-250 Service Manual page 6

2-3-19. MD-76 BOARD AND ENCODER RETAINER ········ 5-49
2-3-20. COMPONENTS OF GL ARM S/T ASSEMBLY
(GL ARM ASSEMBLY, GL HELICAL TORSION
SPRING, GL GEAR) ···················································· 5-50
2-3-21. COMPONENTS OF MIC BASE ASSEMBLY
(FP-104 FLEXIBLE BOARD, MIC BASE) ················· 5-50
2-3-22. COMPONENTS OF DRUM ASSEMBLY
(MOTOR FPC ASSEMBLY, ELASTIC CONNECTOR) · 5-51
2-3-23. COMPONENTS OF PINCH ARM ASSEMBLY
(TAPE RETAINER, COMPRESSION COIL SPRING) ··· 5-51
2-3-24. COMPONENTS OF TG2/7 ARM ASSEMBLY
(ET MAGNET, MAGNET HOLDER) ·························· 5-51
5-2-4. CHECK AND ADJUSTMENT ····································· 5-52
2-4-1. REEL TABLE HEIGHT CHECK AND ADJUSTMENT ·· 5-53
1. Preparation before check ··············································· 5-53
2. Check and adjustment ··················································· 5-53
2-4-2. TG1/8 HEIGHT CHECK AND ADJUSTMENT ·········· 5-53
1. Preparation before check ··············································· 5-53
2. Check and adjustment ··················································· 5-53
2-4-3. TG2/7 HEIGHT CHECK AND ADJUSTMENT ·········· 5-54
1. Preparation before check ··············································· 5-54
2. Check and adjustment ··················································· 5-54
2-4-4. FWD/RVS POSITION CHECK AND ADJUSTMENT ·· 5-54
1. Preparation before check ··············································· 5-54
2. Check and adjustment ··················································· 5-54
2-4-5. ELECTRIC TENSION REGULATOR CHECK AND
ADJUSTMENT OF TG2/7 ARM ································· 5-55
1. Preparation before check ··············································· 5-55
2. Check and adjustment ··················································· 5-55
2-4-6. FWD/RVS BACK TENSION CHECK AND
ADJUSTMENT ····························································· 5-56
1. Preparation before check ··············································· 5-56
2. Check and adjustment ··················································· 5-56
2-4-7. PREPARATION FOR ADJUSTMENT AND
TAPE PATH CHECK ···················································· 5-56
2-4-8. TRACK ADJUSTMENT AND CHECK
(Checking the RF Waveform) ········································ 5-57
2-4-9. TRACK CHECK ··························································· 5-57
2-4-10. CUE/REV CHECK ····················································· 5-58
2-4-11. CURL CHECK AND ADJUSTMENT ······················· 5-58
2-4-12. RISING CHECK ························································ 5-59
5-3. VIDEO SECTION ADJUSTMENTS ··························· 5-60
3-1. PREPARATIONS BEFORE ADJUSTMENTS ············ 5-60
3-1-1. Equipment Required ······················································ 5-60
3-1-2. Precautions on Adjusting ··············································· 5-61
3-1-3. HOW TO ENTER RECORD MODE WITHOUT
CASSETTE ··································································· 5-62
3-1-4. HOW TO ENTER PLAYBACK MODE WITHOUT
CASSETTE ··································································· 5-62
3-1-5. Adjusting Connectors ···················································· 5-62
3-1-6. Connecting the Equipment ············································ 5-62
3-1-7. Alignment Tapes ··························································· 5-63
3-1-8. Input/Output Level and Impedance ······························ 5-63
3-2. SYSTEM CONTROL SYSTEM ADJUSTMENT ········ 5-64
1. Initialization of A, B, C, D, E, F, 8 Page Data ··············· 5-64
2. Serial No. Input ····························································· 5-64
2-1. Company ID Input ························································· 5-64
2-2. Serial No. Input ····························································· 5-64
3. Battery End Adjustment ················································ 5-66
3-3. SERVO AND RF SYSTEM ADJUSTMENT ··············· 5-67
1. Cap FG Duty Adjustment (VI-156 board) ····················· 5-67
2. PLL f & LPF f Adjustment (VI-156 board) ················ 5-67
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3. Switching Position Adjustment (VI-156 board) ············ 5-68
4. AGC Center Level and APC & AEQ Adjustment ········· 5-68
4-1. Preparations before adjustments ···································· 5-68
4-2. AGC Center Level Adjustment (VI-156 board) ············ 5-68
4-3. APC & AEQ Adjustment (VI-156 Board) ····················· 5-69
4-4. Processing after Completing Adjustments ···················· 5-69
5. PLL f & LPF f
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3-4. VIDEO SYSTEM ADJUSTMENTS ····························· 5-70
3-4-1. Base Band Block Adjustments ······································ 5-70
1. Chroma BPF f
0
2. S VIDEO OUT Y Level Adjustment (VI-156 board) ···· 5-70
3. S VIDEO OUT Chroma Level Adjustment
(VI-156 board) ······························································· 5-71
4. VIDEO OUT Y, Chroma Level Check (VI-156 board) ··· 5-71
3-4-2. BIST Check ·································································· 5-72
1. Playback System Check ················································ 5-72
1-1. Preparations for Playback ·············································· 5-72
1-2. IC301 TRX (RF) PB BIST Check ································· 5-72
1-3. IC301 AUD (ABUS) PB BIST Check ··························· 5-72
1-4. IC301 VFD PB BIST Check ········································· 5-72
1-5. IC301 ENCODER BIST Check ···································· 5-73
1-6. Processing after Completing Playback System Check ·· 5-73
3-5. AUDIO SYSTEM ADJUSTMENTS ···························· 5-74
1. Playback Level Check ··················································· 5-75
2. Overall Level Characteristics Check ····························· 5-75
3. Overall Distortion Check ··············································· 5-75
4. Overall Noise Level Check ············································ 5-75
5. Overall Separation Check ·············································· 5-75
5-4. SERVICE MODE ·························································· 5-76
4-1. ADJUSTMENT REMOTE COMMANDER ················ 5-76
1. Using the adjustment remote commander ····················· 5-76
2. Precautions upon using the adjustment remote
commander ···································································· 5-76
4-2. DATA PROCESS ··························································· 5-77
4-3. SERVICE MODE ·························································· 5-78
1. Setting the Test Mode ···················································· 5-78
2. Emergence Memory Address ········································ 5-78
2-1. EMG Code (Emergency Code) ····································· 5-78
2-2. MSW Code ···································································· 5-79
3. Bit value discrimination ················································ 5-80
4. Switch check (1) ···························································· 5-80
5. Switch check (2) ···························································· 5-81
6. Record of Use check ······················································ 5-81
7. Record of Self-diagnosis check ····································· 5-82
8. HRS METER (Hours meter) ········································· 5-83
6. REPAIR PARTS LIST
6-1. EXPLODED VIEWS ······················································ 6-1
6-1-1. OVERALL SECTION-1 ················································· 6-1
6-1-2. OVERALL SECTION-2 ················································· 6-2
6-1-3. OVERALL SECTION-3 ················································· 6-3
6-1-4. CABINET (R) SECTION-1 ············································ 6-4
6-1-5. CABINET (R) SECTION-2 ············································ 6-5
6-1-6 CABINET (R) SECTION-3 ············································ 6-6
6-1-7. CABINET (L) ASSEMBLY ············································ 6-7
6-1-8. CARRYING HANDLE SECTION ································· 6-8
6-1-9. LENS BLOCK SECTION-1 ··········································· 6-9
6-1-10. LENS BLOCK SECTION-2 ······································· 6-10
6-1-11. DRUM SECTION ······················································· 6-11
6-1-12. GEAR, ARM SECTION ············································· 6-12
6-1-13. MOTOR, MD-76 BOARD SECTION ························ 6-13
6-1-14. CASSETTE COMPARTMENT BLOCK ASSEMBLY ·· 6-14
6-2. ELECTRICAL PARTS LIST ········································ 6-15
EVF Section (DXF-801/801CE SERVICE MANUAL)
1. Service Information
1-1. Board Layout ···························································· 1-1 (E)
1-2. Replacement of Main Parts ······································ 1-1 (E)
1-2-1. Notes on Replacement of MAIN Board ··················· 1-1 (E)
1-2-2. Replacement of CRT/DY Assembly ························· 1-1 (E)
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Final Adjustment (VI-156 board) ······· 5-69
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Adjustment (VI-156 board) ·················· 5-70
Attached Manual