JVC HR-S6850MS, Руководство по обслуживанию

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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 .............................................................. 3-1
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 .......................................................................... 3-2
3.3.1 D/A level .......................................................................... 3-2
3.3.2 EE Y/PB Y (S-VHS/VHS) level ......................................... 3-2
3.3.3 REC color (colour) level ................................................... 3-3
3.3.4 Video EQ (Frequency response) ..................................... 3-3
3.3.5 Auto picture initial setting ................................................. 3-4
3.4 Audio circuit .......................................................................... 3-4
3.4.1 Audio REC FM ................................................................. 3-4
3.5 Syscon circuit ....................................................................... 3-4
3.5.1 Timer clock ...................................................................... 3-4
3.6 PAL/SECAM Converter circuit .............................................. 3-5
3.6.1 Colour difference level ..................................................... 3-5
3.6.2 SECAM burst position ..................................................... 3-5
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM .......................................... 4-1
CIRCUIT BOARD NOTES ........................................................... 4-2
4.1 BOARD INTERCONNECTIONS .......................................... 4-3
4.2 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM .................. 4-5
4.3 MAIN (ON SCREEN) SCHEMATIC DIAGRAM .................... 4-7
4.4 MAIN (SECAM) SCHEMATIC DIAGRAM ............................. 4-9
4.5 MAIN (SYSCON) SCHEMATIC DIAGRAM ........................ 4-11
4.6 MAIN (SW.REG) SCHEMATIC DIAGRAM ......................... 4-13
4.7 MAIN (TUNER) SCHEMATIC DIAGRAM ........................... 4-15
4.8 MAIN (SW/DISPLAY), MINI FRONT, S-JACK AND ADV. JOG
SCHEMATIC DIAGRAMS ..................................................... 4-17
4.9 MAIN (MAIN TERMINAL) SCHEMATIC DIAGRAM ............ 4-19
4.10 2D DIGITAL SCHEMATIC DIAGRAM
[HR-S6850MS/S7850MS/S7851MS] ............................... 4-21
4.11 3D/TBC(2M) SCHEMATIC DIAGRAM [HR-S8850MS] .... 4-23
4.12 TERMINAL (S-SUB) SCHEMATIC DIAGRAM ................. 4-25
4.13 TERMINAL (I/O) SCHEMATIC DIAGRAM ....................... 4-27
4.14 DEMODULATOR SCHEMATIC DIAGRAM ...................... 4-29
4.15 S-P CONVERTER SCHEMATIC DIAGRAM .................... 4-31
4.16 MAIN CIRCUIT BOARD ................................................... 4-33
4.17 2D DIGITAL AND 3D DIGITAL/2M CIRCUIT BOARDS ... 4-36
4.18 TERMINAL CIRCUIT BOARD ......................................... 4-37
4.19 S-P CONVERTER AND DEMODULATOR CIRCUIT BOARDS 4-38
4.20 FDP GRID ASSIGNMENT AND ANODE CONNECTION 4-39
4.21 REMOTE CONTROLLER SCHEMATIC DIAGRAMS ...... 4-40
4.22 WAVEFORMS .................................................................. 4-41
4.23 VOLTAGE CHARTS ......................................................... 4-43
4.24 CPU PIN FUNCTION ....................................................... 4-45
4.25 SYSTEM CONTROL BLOCK DIAGRAM ......................... 4-47
4.26 VIDEO BLOCK DIAGRAM ............................................... 4-49
4.27 AUDIO BLOCK DIAGRAM ............................................... 4-53
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ............... 5-1
5.2 FINAL 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>(MODEL:A,B,C) ......... 5-14
3D DIGITAL/2M BOARD ASSEMBLY <05>(MODEL:D) .......... 5-15
TERMINAL BOARD ASSEMBLY <06> ................................... 5-16
A/C HEAD BOARD ASSEMBLY <12> ..................................... 5-18
DEMOD BOARD ASSEMBLY <14> ........................................ 5-18
MINI FRONT BOARD ASSEMBLY(MODEL:B,C,D)<28> ........ 5-19
S JACK BOARD ASSEMBLY <36> ......................................... 5-19
ADV.JOG BOARD ASSEMBLY <38> ....................................... 5-19
LOADING MOTOR BOARD ASSEMBLY <55> ....................... 5-19
S/P CONVERTER BOARD ASSEMBLY <87> ........................ 5-19
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 set the “Service position” ..................................... 1-4
1.5 Mechanism service mode ..................................................... 1-4
1.5.1 How to set the “Mechanism service mode” ..................... 1-4
1.6 Jig RCU mode ...................................................................... 1-4
1.6.1 Setting the Jig RCU mode ............................................... 1-4
1.6.2 Setting the User RCU mode ............................................ 1-4
1.7 Servicing items related to video navigation .......................... 1-4
1.8 Emergency display function .................................................. 1-5
1.8.1 Displaying the EMG information ...................................... 1-5
1.8.2 Clearing the EMG history ................................................ 1-5
1.8.3 EMG content description ................................................. 1-6
1.8.4 EMG detail information <1> ............................................. 1-7
1.8.5 EMG detail information <2> ............................................. 1-8
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 ............................. 2-2
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” ............... 2-6
2.2.3 Cassette holder assembly ............................................... 2-6
2.2.4 Pinch roller arm assembly ............................................... 2-8
2.2.5 Guide arm assembly and press lever assembly .............. 2-8
2.2.6 A/C head ......................................................................... 2-8
2.2.7 Loading motor ................................................................. 2-8
2.2.8 Capstan motor ................................................................. 2-9
2.2.9 Pole base assembly (supply or take-up side) .................. 2-9
2.2.10 Rotary encoder ........................................................... 2-10
2.2.11 Clutch unit ................................................................... 2-10
2.2.12 Change lever assembly, direct gear, clutch gear and coupling gear 2-10
2.2.13 Link lever ..................................................................... 2-11
2.2.14 Cassette gear, control cam and worm gear ................ 2-11
2.2.15 Control plate ............................................................... 2-11
2.2.16 Loading arm gear (supply or take-up side) and
loading arm gear shaft .................................................. 2-12
2.2.17 Take-up lever, take-up head and control plate guide .. 2-13
2.2.18 Capstan brake assembly ............................................ 2-13
2.2.19 Sub brake assembly (take-up side) ............................ 2-13
2.2.20 Main brake assembly (take-up side), reel disk (take-up side)
and main brake assembly (supply side) ............................... 2-13
2.2.21 Tension brake assembly, reel disk (supply side) and
tension arm assembly ................................................. 2-14
2.2.22 Idler lever, idler arm assembly .................................... 2-14
2.2.23 Stator assembly .......................................................... 2-14
2.2.24 Rotor assembly ........................................................... 2-14
2.2.25 Upper drum assembly ................................................. 2-15
2.3 Compatibility adjustment .................................................... 2-16
2.3.1 FM waveform linearity ................................................... 2-16
2.3.2 Height and tilt of the A/C head ...................................... 2-17
2.3.3 A/C head phase (X-value) ............................................. 2-17
2.3.4 Standard tracking preset ............................................... 2-18
2.3.5 Tension pole position ..................................................... 2-18
3. ELECTRICAL ADJUSTMENT
3.1 Precaution ............................................................................ 3-1
3.1.1 Required test equipments ............................................... 3-1
3.1.2 Required adjustment tools ............................................... 3-1
TABLE OF CONTENTS
Section Title Page Section Title Page
HR-S6850MS HR-S7850MS HR-S7851MS HR-S8850MS
FLYING ERASE HEAD NOT USED USED USED USED
DIGITAL 3R/TBC/FRAME MEMORY NOT USED NOT USED NOT USED USED
YNR/CNR/S.COLOR NOT USED / 2D/NOT USED NOT USED / 2D / NOT USED NOT USED / 2D / NOT USED USED (3D) / 3D / USED (3D)
RE-TAKE/ASSEMBLE EDIT NOT USED / A.F.E. USED / Z.F.E. USED / Z.F.E. USED / Z.F.E.
INSERT/OPERATION,
NOT USED USED/BUTTON USED/BUTTON USED/BUTTON
AUDIO DUBBING / OPERATION
HiFi LEVEL METER
NOT USED USED USED USED
R.PAUSE TERMINAL NOT USED USED USED USED
REAR OUT AUDIO L/R AUDIO L/R & S-OUT AUDIO L/R & S-OUT AUDIO L/R & S-OUT
CABLE BOX OR DBS. BOX OR SAT CTL OPTION OPTION OPTION USED
CABLE MOUSE OPTION OPTION OPTION PROVIDED
RCU V13 SMALL 10KEY V13 SMALL 10KEY V13 SMALL 10KEY V13 LCD
RCU TYPE / COLOR V14#E11-S / SILVER V14#E11-S / SILVER V14#E11-S / SILVER V14#E5 / LIGHT BEIGE
RCU MBR /IR CODE NOT USED / A NOT USED / A NOT USED / A USED (TV, SAT/CABLE) / A, B
F-AV CAP NOT USED USED USED USED
WINDOW COLOR SMOKE LIGHT GRAY SMOKE LIGHT GRAY GREEN SMOKE LIGHT GRAY
The following table lists the differing points between Models ( HR-S6850MS, HR-S7850MS, HR-S7851MS and HR-S8850MS) in this series.