3.1.1 Required test equipments .............................................. 3-1
3.1.2 Required adjustment tools ............................................. 3-1
3.1.3 Color (colour) bar signal,Color (colour) bar pattern .......... 3-1
3.1.4 Switch settings and standard precautions ...................... 3-1
3.1.5 EVR Adjustment .............................................................. 3-2
3.2 SERVO CIRCUIT ................................................................... 3-2
3.2.1 Switching point ................................................................ 3-2
3.2.2 Slow tracking preset ........................................................ 3-2
3.3 VIDEO CIRCUIT .................................................................... 3-3
3.3.1 D/A level .......................................................................... 3-3
3.3.2 EE Y level ........................................................................ 3-3
3.3.3 REC color (colour) level ................................................... 3-3
3.3.4 PB Y level (S-VHS/VHS) ................................................... 3-4
3.3.5 Video EQ (Frequency response) ...................................... 3-4
3.3.6 AUTO PICTURE initial setting .......................................... 3-4
3.4 AUDIO CIRCUIT ................................................................... 3-5
3.4.1 Audio REC FM ................................................................. 3-5
3.5 DEMODULATOR CIRCUIT ................................................... 3-5
3.5.1 Input level ........................................................................ 3-5
3.5.2 Stereo VCO ..................................................................... 3-5
3.5.3 Stereo filter ...................................................................... 3-6
3.5.4 Separation - 1 .................................................................. 3-6
3.5.5 Separation - 2 .................................................................. 3-6
3.5.6 SAP VCO ......................................................................... 3-6
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM ............................................ 4-1
CIRCUIT BOARD NOTES ............................................................. 4-2
4.1 BOARD INTERCONNECTIONS ............................................ 4-3
4.2 VIDEO/AUDIO SCHEMATIC DIAGRAM ............................... 4-5
4.3 SYSTEM CONTROL SCHEMATIC DIAGRAM ...................... 4-7
4.4 SWITCHING REGULATOR SCHEMATIC DIAGRAM ............ 4-9
4.5 TUNER SCHEMATIC DIAGRAM ........................................ 4-11
4.6 DISPLAY, S JACK AND SHUTTLE SCHEMATIC DIAGRAMS .. 4-13
4.7 TERMINAL SCHEMATIC DIAGRAM .................................. 4-15
4.8 BS CONNECTION, C.BOX AND R.PAUSE SCHEMATIC
DIAGRAMS ........................................................................ 4-16
4.9 S-SUB AND SUB EMPHA SCHEMATIC DIAGRAMS ......... 4-17
4.10 2D DIGITAL SCHEMATIC DIAGRAM ............................... 4-19
4.11 DEMODULATOR SCHEMATIC DIAGRAM ...................... 4-21
4.12 MAIN, A/C HEAD, C.BOX, S JACK, R.PAUSE, SHUTTLE
AND LOADING MOTOR CIRCUIT BOARDS ................... 4-25
4.13 2D DIGITAL CIRCUIT BOARD ......................................... 4-28
4.14 SUB EMPHA CIRCUIT BOARD ....................................... 4-29
4.15 DEMODULATOR CIRCUIT BOARD ................................. 4-30
4.16 FDP GRID ASSIGNMENT AND ANODE CONNECTION .. 4-31
4.17 REMOTE CONTROL SCHEMATIC DIAGRAM ................. 4-32
4.18 VOLTAGE CHARTS .......................................................... 4-33
4.19 SYSTEM CONTROL BLOCK DIAGRAM .......................... 4-37
4.20 VIDEO BLOCK DIAGRAM ............................................... 4-39
4.21 AUDIO BLOCK DIAGRAM ............................................... 4-43
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ................ 5-1
5.2 CABINET AND CHASSIS ASSEMBLY <M2> ...................... 5-2
5.3 MECHANISM ASSEMBLY <M4> ....................................... 5-4
5.4 ELECTRICAL PARTS LIST .................................................... 5-6
MAIN BOARD ASSEMBLY <03> .............................................. 5-6
2D DIGITAL BOARD ASSEMBLY <05> .................................. 5-12
R.PAUSE BOARD ASSEMBLY <06> ....................................... 5-13
SUB EMPHA BOARD ASSEMBLY <08> ................................. 5-13
AUDIO CONTROL HEAD BOARD ASSEMBLY <12> ............. 5-13
DEMOD BOARD ASSEMBLY <14> ........................................ 5-13
S JACK BOARD ASSEMBLY(S4800U/U(C)) <36> ................... 5-14
LOADING MOTOR BOARD ASSEMBLY <55> ....................... 5-14
SHUTTLE BOARD ASSEMBLY <85> ...................................... 5-14
C.BOX BOARD ASSEMBLY <92> ........................................... 5-14
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 DISASSEMBLY FLOW CHART ............................................. 1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY ...... 1-1
1.3 DISASSEMBLY/ASSEMBLY METHOD ................................. 1-1
1.4 SERVICE POSITION ............................................................. 1-4
1.4.1 How to take out the Mechanism and Main board assemblies 1-4
1.5 MECHANISM SERVICE MODE ............................................ 1-5
1.5.1 How to set the "MECHANISM SERVICE MODE" ............ 1-5
1.6 EMERGENCY DISPLAY FUNCTION ....................................... 1-6
1.6.1 Displaying the emergency information ............................ 1-6
1.6.2 Clearing the emergency history ...................................... 1-6
1.6.3 Emergency content description ...................................... 1-7
1.6.4 Emergency detail information
1
..................................... 1-8
1.6.5 Emergency detail information
2
..................................... 1-9
1.7 SYSCON CIRCUIT .............................................................. 1-10
1.7.1 Syscon CPU pin function (IC3001) ................................ 1-10
2. MECHANISM ADJUSTMENT
2.1 BEFORE STARTING REPAIR AND ADJUSTMENT ................ 2-1
2.1.1 Precautions ...................................................................... 2-1
2.1.2 Checking for Proper Mechanical Operations ................... 2-1
2.1.3 Manually Removing the Cassette Tape ........................... 2-1
2.1.4 Jigs and Tools Required for Adjustment .......................... 2-3
2.1.5 Maintenance and Inspection ........................................... 2-3
2.2 REPLACEMENT OF MAJOR PARTS .................................... 2-6
2.2.1 Before Starting Disassembling (Phase matching
between mechanical parts) ............................................. 2-6
2.2.2 How to Set the Mechanism Assembling Mode .............. 2-7
2.2.3 Cassette Holder Assembly .............................................. 2-7
2.2.4 Pinch Roller Arm Assembly ........................................... 2-10
2.2.5 Guide Arm Assembly and Press Lever Assembly ......... 2-10
2.2.6 Audio Control Head ....................................................... 2-10
2.2.7 Loading Motor ............................................................... 2-11
2.2.8 Capstan Motor ............................................................... 2-11
2.2.9 Pole Base Assembly (supply or take-up side) ................ 2-12
2.2.10 Rotary Encoder ........................................................... 2-12
2.2.11 Clutch Unit .................................................................. 2-13
2.2.12 Change Lever Assembly, Direct Gear and Clutch Gear1 . 2-13
2.2.13 Link Lever ................................................................... 2-13
2.2.14 Cassette Gear, Control Cam and Worm Gear ............. 2-14
2.2.15 Control Plate ............................................................... 2-14
2.2.16 Loading Arm Gear (supply or take-up side) and
Loading Arm Gear Shaft ............................................. 2-15
2.2.17 Take-up Lever, Take-up Head and Control Plate Guide 2-16
2.2.18 Capstan Brake Assembly ............................................ 2-16
2.2.19 Sub Brake Assembly (take-up side) ............................ 2-17
2.2.20 Main Brake Assembly (take-up side), Reel Disk (take-up
side) and Main Brake Assembly (supply side) .................. 2-17
2.2.21 Tension Brake Assembly, Reel Disk (supply side) and
Tension Arm Assembly ............................................... 2-17
2.2.22 Idler Lever, Idler Arm Assembly ................................. 2-18
2.2.23 Stator Assembly ......................................................... 2-18
2.2.24 Rotor Assembly .......................................................... 2-18
2.2.25 Upper Drum Assembly ............................................... 2-19
2.3 COMPATIBILITY ADJUSTMENT ........................................ 2-20
2.3.1 Checking/Adjustment of FM Waveform Linearity ......... 2-20
2.3.2 Checking/Adjustment of the Height and Tilt of the
Audio Control Head ....................................................... 2-21
2.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) . 2-21
2.3.4 Checking/Adjustment of the Standard Tracking Preset . 2-22
2.3.5 Checking/Adjustment of the Tension Pole Position ....... 2-22
3. ELECTRICAL ADJUSTMENT
3.1 PRECAUTION ...................................................................... 3-1
HR-S3800U/U(C)
HR-S4800U/U(C)
FLYING ERASE HEAD
NOT USED
USED
INSERT EDIT
NOT USED
USED
AUDIO DUBBING
NOT USED
USED
FRONT S-VIDEO INPUT TERMINAL
NOT USED
USED
CABLE MOUSE
OPTION
PROVIDEO
The following table lists the differing points between Models ( HR-S3800U/U(C) and HR-S4800U(C) ) in this series.
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