SERVICE MANUAL
SERVICE MANUAL SERVICE MANUAL
Feature Difference ................................................................... 3 Service Note ............................................................................ 5 1. GENERAL Getting Started .............................................................. 1-1 Basic Operations ........................................................... 1-7 Additional Operations .................................................... 1-11 Additional Information ................................................... 1-14 2. DISASSEMBLY 2-1. Upper Case Removal .................................................... 2-1 2-2. Rear Panel Removal ..................................................... 2-1 2-3. Front Panel Section Removal ........................................ 2-1 2-4. FR-127, DM-62 Board Removal ................................... 2-1 2-5. RP-230, SE-68 Board Removal .................................... 2-2 2-6. Mechanism Deck Removal............................................ 2-2 2-7. MA-315, SR-825 Board Removal ................................. 2-2 2-8. Internal Views ................................................................ 2-3 2-9. Circuit Boards Location ................................................. 2-4 3. BLOCK DIAGRAMS 3-1. Overall Block Diagram ................................................... 3-1 3-2. Video Block Diagram ..................................................... 3-4 3-3. Servo/System Control Block Diagram .......................... 3-7 3-4. I/O, C+ Block Diagram ................................................... 3-9 3-5. Audio Block Diagram ..................................................... 3-11 3-6. Tuner Block Diagram ..................................................... 3-13 3-7. Mode Control Block Diagram ........................................ 3-15 3-8. Power Block Diagram .................................................... 3-18 4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 4-1. Frame Schematic Diagram ............................................ 4-1 4-2. Printed Wiring Boards and Schematic Diagrams ......... 4-5 RP-230 Printed Wiring Board ........................................ 4-5 RP-230 Schematic Diagram ......................................... 4-7 MA-315 Printed Wiring Board ....................................... 4-10 MA-315 (Video, Audio) Schematic Diagram ................. 4-13 MA-315 (Servo/System Control) Schematic Diagram .. 4-17 MA-315 (Hi-Fi Audio) Schematic Diagram.................... 4-21 MA-315 (OSD) Schematic Diagram .............................. 4-23 MA-315 (IN/OUT) Schematic Diagram ......................... 4-25 MA-315 (Tuner) Schematic Diagram ............................ 4-28 SE-68 Printed Wiring Board and Schematic Diagram .. 4-31 DM-72, FR-127 Schematic Diagram ............................. 4-34 DM-72, FR-127 Printed Wiring Board ........................... 4-37 SR-825 Printed Wiring Board ........................................ 4-39 SR-825 Schematic Diagram ......................................... 4-41 5. INTERFACE, IC PIN FUNCTION DESCRIPTION TABLE OF CONTENTS Section Title Page Section Title Page – 4 – 5-1. System Control-Video/RP Block Interface (MA-315 board IC161) .................................................. 5-1 5-2. System Control-Servo Peripheral Circuit Interface (MA-315 board IC161) .................................................. 5-1 5-3. System Control-Mechanism Interface (MA-315 board IC161) .................................................. 5-2 5-4. System Control-System control Peripheral circuit Interface (MA-315 board IC161) ................................... 5-3 5-5. System Control-Audio Block Interface (MA-315 board IC161) .................................................. 5-3 5-6. Servo/System/Tuner/Timer Control Microprocessor Pin Function (MA-315 board IC161) ............................. 5-4 6. ERROR CODE .......................................................... 6-1 7. ADJUSTMENTS 7-1. Mechanical Adjustments ............................................... 7-1 7-2. Electrical Adjustments ................................................... 7-1 2-1. Pre-Adjustment Preparations ........................................ 7-1 2-1-1. Instruments to be Used ............................................ 7-1 2-1-2. Connection ............................................................... 7-1 2-1-3. Set-up of Adjustment ............................................... 7-1 2-1-4. Alignment Tape ......................................................... 7-1 2-1-5. Specified I/O Level and Impedance ......................... 7-2 2-1-6. Adjusting Sequence ................................................. 7-2 2-2. Power Supply Adjustment ............................................. 7-2 2-2-1. Power Supply Check ................................................ 7-2 2-3. Servo System Adjustment ............................................. 7-3 2-3-1. Switching Position Adjustment ................................. 7-3 2-4. Video System Adjustment ............................................. 7-3 2-4-1. Playback Y signal Level Check ................................ 7-3 2-4-2. Recording Chroma Level Check .............................. 7-4 2-4-3. Sync. AGC Check ..................................................... 7-4 2-4-4. X’tal Oscillation Frequency Check ........................... 7-4 2-5. Audio System Adjustment ............................................. 7-5 2-5-1. Hi-Fi Audio System Adjustment ............................... 7-5 1. AF Switching Position Adjustment ........................... 7-5 2. Frequency Responce Check .................................... 7-5 3. Overall Level Characteristic and Distortion Factor Check ........................................... 7-6 4. Overall S/N Check .................................................... 7-6 2-5-2. Normal Audio System Adjustment ........................... 7-6 1. ACE Head Adjustment ............................................. 7-6 2. E-E Output Level Check ........................................... 7-6 3. Frequency Responce Adjustment ............................ 7-6 4. Overall Level Characteristic and Distortion Factor Check ............................................................ 7-7 5. Overall S/N Check .................................................... 7-7 2-6. Parts Arrangement Diagram for Adjustments ............... 7-8 8. REPAIR PARTS LIST 8-1. Exploded Views ............................................................. 8-1 8-1-1. Front Panel and Cabinet Assemblies ....................... 8-1 8-1-2. Chassis Assembly .................................................... 8-3 8-1-3. Mechanism Chassis Assembly (1) ........................... 8-4 8-1-4. Mechanism Chassis Assembly (2) ........................... 8-5 8-1-5. Mechanism Chassis Assembly (3) ........................... 8-6 8-2. Electrical Parts List ....................................................... 8-7
SERVICE NOTE 1. DISASSEMBLY • This set can be disassembled in the order shown below. Note: Pages in indicate pages in the SERVICE MANUAL. Pages in indicate pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI. Set Upper Case (Page 2-1) Rear Panel (Page 2-1) RP-230 Board (Page 2-2) Mechanism Deck (Page 2-2) MA-315 Board (Page 2-2) Rotary Switch (Page 2-2) Front Panel Section (Page 2-1) Tuner Unit (Page 2-2) SR-826 Board (Page 2-2) FL Complete Ass’y (Page 11) Retainer Plate (Page 22) FL Slider Block Ass’y (Page 22) Cam Motor Retainer (Page 31) Cam Motor (Page 31) – 5 – SE-68 Board (E730B/E735B) (Page 2-2) FR-127, DM-72 Board (Page 2-1) Cam Gear (Page 23) Rubber Belt (Page 15) Slider (Page 26) Loading Arm (T, S) (Page 28) Loading Gear (T, S) (Page 28) Pinch Press Block Ass’y (Page 14) Rubber Belt (Page 15) Pully Gear Ass’y (Page 29) Reel Direct Ass’y (Page 30) Rubber Belt (Page 15) Capstan Motor (Page 15) Ground Shaft ass’y (Page 13) Drum Ass’y (Page 13)
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- Page 3: • Feature Difference SLV- E727VC/
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- Page 9 and 10: 1-4
- Page 11 and 12: 1-6
- Page 13 and 14: 1-8
- Page 15 and 16: 1-10
- Page 17 and 18: 1-12
- Page 19 and 20: 1-14
- Page 21 and 22: Note: Follow the disassembly proced
- Page 23 and 24: 2-8. INTERNAL VIEWS FE head 1-500-1
- Page 46 and 47: 5-1 5-1. SYSTEM CONTROL - VIDEO/RP
- Page 48 and 49: 5-3 5-4. SYSTEM CONTROL - SYSTEM CO
- Page 50 and 51: This set displays an error code, an
- Page 52 and 53: 2-1-5. Specified I/O Level and Impe
<strong>SERVICE</strong> NOTE<br />
1. DISASSEMBLY<br />
• This set can be disassembled in the order shown below.<br />
Note: Pages in indicate pages in the <strong>SERVICE</strong> <strong>MANUAL</strong>.<br />
Pages in indicate pages in the VHS MECHANICAL ADJUSTMENT <strong>MANUAL</strong> VI.<br />
Set<br />
Upper<br />
Case<br />
(Page 2-1)<br />
Rear<br />
Panel<br />
(Page 2-1)<br />
RP-230<br />
Board<br />
(Page 2-2)<br />
Mechanism<br />
Deck<br />
(Page 2-2)<br />
MA-315<br />
Board<br />
(Page 2-2)<br />
Rotary<br />
Switch<br />
(Page 2-2)<br />
Front Panel<br />
Section<br />
(Page 2-1)<br />
Tuner<br />
Unit<br />
(Page 2-2)<br />
SR-826<br />
Board<br />
(Page 2-2)<br />
FL Complete<br />
Ass’y<br />
(Page 11)<br />
Retainer<br />
Plate<br />
(Page 22)<br />
FL Slider<br />
Block Ass’y<br />
(Page 22)<br />
Cam Motor<br />
Retainer<br />
(Page 31)<br />
Cam Motor<br />
(Page 31)<br />
– 5 –<br />
SE-68 Board<br />
(E730B/E735B)<br />
(Page 2-2)<br />
FR-127, DM-72<br />
Board<br />
(Page 2-1)<br />
Cam Gear<br />
(Page 23)<br />
Rubber<br />
Belt<br />
(Page 15)<br />
Slider<br />
(Page 26)<br />
Loading<br />
Arm (T, S)<br />
(Page 28)<br />
Loading<br />
Gear (T, S)<br />
(Page 28)<br />
Pinch Press<br />
Block Ass’y<br />
(Page 14)<br />
Rubber<br />
Belt<br />
(Page 15)<br />
Pully Gear<br />
Ass’y<br />
(Page 29)<br />
Reel Direct<br />
Ass’y<br />
(Page 30)<br />
Rubber<br />
Belt<br />
(Page 15)<br />
Capstan<br />
Motor<br />
(Page 15)<br />
Ground Shaft<br />
ass’y<br />
(Page 13)<br />
Drum<br />
Ass’y<br />
(Page 13)
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