JVC BR-S822U - D;C Servo Circuit; Capstan FG Duty Factor and Level; Tracking Preset; PB Switching Point

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Table of Contents3
Safety Precautions4
Safety Check after Servicing5
General Description6
Detail of Alterations6
Mechanism Adjustment7
Changes in Mechanism Assembly7
A/C Head - Change8
Pinch Roller Arm Assembly - Change9
Mode Motor - Change9
Pinch Roller Solenoid Position - Addition9
Full Erase Head - Addition10
Pole Base Assembly - Change10
Electrical Adjustment11
Audio Rec Level VR Setting and Audio Level Meter Adjustment11
Normal Audio Playback Level Adjustment11
Normal Audio Playback Frequency Response11
Audio Bias Frequency and Level12
Normal Audio REC/PB12
Normal Audio PB Frequency Response - REC/PB13
Full Erase Frequency14
BR-S822U Audio Insert Erase Voltage14
BR-S622U Audio Post-Recording Erase Voltage14
BR-S822U Normal Audio Insert Crosstalk Cancel15
BR-S622U Normal Audio Post-Recording Crosstalk Cancel15
BR-S822 U Normal Audio Insert Bias Trap15
BR-S622 U Normal Audio Post-Recording Bias Trap15
BR-S822U Time Code Bias Trap16
Hi-Fi Audio Carrier Frequency16
Hi-Fi Audio FM Output Level16
Hi-Fi Audio PB Level16
Audio Circuit - BR-S522U/BR-S525U17
Diagrams and Circuit Boards19
Expression of Connector19
Expression of Wiring19
Signal Flow on the Diagram19
Circuit Board Locations20
Overall Wiring Diagram21
Mother-1 Schematic Diagram27
Mother-1 Circuit Board Diagram29
Mother-2 Schematic Diagram30
Mother-2 Circuit Board Diagram32
Audio-3 Circuit Board Diagram33
Audio-3 Schematic Diagram34
AV Micom/Onscreen Circuit Board Diagram36
AV Micom/Onscreen Schematic Diagram37
Mother-1 Circuit Board38
Exploded Views and Parts List39
Exploded Part Number Coding40
Packing Assembly M140
Packing Assembly M1 Parts List41
Cabinet Assembly M2 View42
Cabinet Assembly M2 Parts List43
Chassis Assembly M3 View44
Chassis Assembly M3 Parts List45
Frame Assembly M4 Parts List46
Frame Assembly M4 View47
Rear Bracket Assembly M5 View48
Rear Bracket Assembly M5 Parts List49
Mechanism 1 Assembly M6 View50
Mechanism 1 Assembly M6 Parts List51
Mechanism 2 Assembly M7 View52
Mechanism 2 Assembly M7 Parts List53
Cassette Housing Assembly M8 Parts List54
Cassette Housing M8 View55
Drum Assembly M9A/M9B View and Parts List56
Electrical Parts List57
Front Panel Assembly61
Cassette Panel Assembly MA View and Parts List61
Operation Panel Assembly MB View and Parts List62
AV M/ONSC Board Assy 41 Parts List64
Specifications69
Comparison Table of Different Parts and Function by Model71
Precautions During Servicing74
Precautions78
Features78
Controls and Connectors79
Front Sub-Panel Overview81
Rear Panel82
Connections - Video Equipment83
Connections - Audio Equipment83
Reference Sync Signals for Recording and Playback84
Loading and Unloading Video Cassettes84
On-Screen Displays85
Playback85
Shutter Search86
Jog Search86
Rewind and Fast-Forward86
Preroll Playback86
Recording87
Recording Level Adjustments87
Record-Pause and Assemble Editing87
Time Code/User Bits Recording/Playback88
ID Code88
Time Code Editing88
Preset Recording88
Guide to Editing89
Regenerated Recording89
Quick Guide to Editing Techniques89
Editing Connections90
Connections for Swap Editing90
Connections for A/B Roll Editing90
Manual Editing91
Preparing Recording Tapes for Editing91
Preroll Editing91
Automatic Editing92
Run Editing92
On-Screen Edit Data Display93
Counter Display94
Setup Menu95
ROM Version/Hour Meter Display99
Warning Display100
Diagnostic Codes100
Test Points101
Automatic Equaliser101
Installation101
Rack Mounting101
Connector Specifications102
Controls and Connectors Overview104
Front Sub-Panel106
Audio Dubbing108
Menu Settings108
Removal of External Covers113
Removal of Main Boards114
Internal Switches117
RP y Switches117
R/P Color 2 Switches117
R/P Adjust Switches117
Y Comb Switches118
Output Switches118
M. CTL & R. Servo Switches119
TBC-1 Switches120
TBC-3 Switches120
Time Code G/R Switches121
45 Pin Main Switches121
RS-232C Switches121
Memory Switch Initialization122
Indication of ROM and Microprocessor Versions122
7-Pin Cable123
When in Trouble124
To Take Cassette out of Set Manually124
Video System Problems124
Audio System Problems125
Operational System Problems125
Syscon System Problems125
Mechanism System Problems126
Check of Supply Voltage126
Protocol of 9-Pin Remote Connector127
Specification of 9-Pin Connector127
Communication Format127
Command Format128
Command Table128
Command from Controller131
BR-S822E/622E/522E Status Data137
Return from Device139
Detail Timing Chart141
Wide Aspect ID142
Adjustment Mode142
Mechanism Adjustment Description143
Jigs and Special Tools for Mechanism Adjustment143
Mechanism Operation Check143
Precautions Replacement of Main Parts144
Location of Main Parts145
Cleaning146
Oiling and Greasing146
Replacement of Main Parts147
Cassette Housing Assembly Replacement147
Cassette Housing Motor Replacement148
Brush Assembly Replacement149
Upper Drum Assembly Replacement150
Centering of Upper Drum - to Remove Upper Drum Wobbling in the Rim152
Cautions to Handle Microchecker152
Drum Assembly Replacement153
A/C Head Replacement154
Mechanism Assembly Replacement155
Tension Arm Replacement155
Pinch Roller Arm Assembly Replacement155
Capstan Motor Replacement156
Reel Motor Replacement156
Loading Motor Replacement156
Main Brake, TU Sub Brake Replacement157
Pole Base Assembly Replacement157
Assembling of Mechanism158
Mechanism Parts Arrangement159
Adjustment of Reel Servo Circuit160
Tension Sensor Position160
Arrangement of Test Points and Vrs161
Hall Element Output Bias161
Hall Element Output Gain161
Loading Torque162
Reel FG Duty163
Play Mode Back Tension163
Reverse (X1) Torque163
Tension Warning Data Setting164
Interchangeability Adjustment165
Names of Main Parts165
FM Waveform Check165
Linearity Adjustment166
A/C Head Adjustment168
X Value Adjustment169
Adjustment of Tape Transport System170
Supply Guide Roller Height Adjustment170
Take-Up Guide Pole Height Adjustment171
Guide Arm Foller Height Adjustment171
Tension Pole Perpendicularity (Vertical Centering) Check172
Electrical Adjustments173
Required Tools and Test Instruments173
Specification of Alignment Tapes174
Signals Required for Video System Adjustment175
Main Boards Location176
Initial Setting of Front and Rear Panel Switches at Shipment176
Explanation of Main Columns in Check and Adjustment177
Check Point Column177
Signal Column/Mode Column177
About RAP Mode177
D/C Servo Circuit178
Capstan FG Duty Factor and Level178
Tracking Preset178
PB Switching Point178
Audio Circuit179
Audio REC Level VR Setting & Audio Level Meter Adjustment179
Normal Audio Playback Level179
Normal Audio Playback Frequency Response Check and Adjustment179
Audio Bias Frequency and Level Check and Adjustment180
Normal Audio REC/PB Check and Adjustment180
Normal Audio PB Frequency Response (REC/PB)181
Full Erase Frequency Check and Adjustment182
BR-S822 Audio Insert Erase Voltage182
BR-S622 Audio Post-Recording Voltage182
BR-S822 Normal Audio Insert Crosstalk Cancel183
BR-S622 Normal Audio Post-Recording Crosstalk Cancel183
BR-S822 Normal Audio Insert Bias Trap184
BR-S822 Time Code Bias Trap184
Hi-Fi Audio Carrier Frequency Check/Adjustment184
Hi-Fi Audio FM Output Level Check/Adjustment184
Hi-Fi Audio PB Level Check/Adjustment185
Hi-Fi Audio REC FM Level185
Hi-Fi Audio REC/PB Level185
Video Circuit186
Vcxo/Agc186
Video Input Level186
Y/C 443 y Input Level186
E-E Color Input Level187
Video Level Meter187
Sub-Emphasis Input Level187
Carrier and Deviation188
White and Dark Clip188
S-VHS Mode Detection - PB Mode189
Modulation Balance189
PB Sub-Demphasis189
RF Equalizer190
REC FM Level191
REC Frequency Response192
Tracking Meter193
Y Output Level193
PB VCO/PB Subcarrier193
E-E Pilot Burst Phase193
REC Color Level194
DG Comp195
E-E Pilot Burst Level196
Color DOC196
Crosstalk Cancel196
Cnr197
CNR Feedback Ratio197
PB Pilot Burst Phase Detct198
CRI Equalizer198
Afc198
REF. Burst199
Color Output Level199
Auto Equalizer200
Pilot Burst Delete201
S-VHS Sideband Comparator201
REC Y/C Delay201
PB Y/C Delay202
2Fc Cancel202
ADD V Pulse202
On Screen203
VITC SEP Clamp Voltage203
Location of Test Points and Adjustment Parts204
Sub Panel Circuit206
Video Phase206
Genlock SC Phase206
Diagrams and Printed Circuit Boards207
Key to Abbreviations208
Replacing Subminature "Chip" Parts210
Shapes of Transistors and Diodes211
Locations of Circuit Boards212
REC/PB y Block Diagram213
REC/PB Color-1 Block Diagram214
REC/PB Color-2 Block Diagram215
R/P Adjust Block Diagram216
Output Block Diagram217
Y Comb Block Diagram218
Drum/Capstan Servo Block Diagram219
Hi-Fi Audio Block Diagram220
Normal Audio Block Diagram221
AV Micom/Onscreen Block Diagram222
Syscon Block Diagram223
M-CTL and Reel Servo Block Diagram224
Wiring Diagram225
Mother Board-1 Schematic Diagram228
Mother Board-1 Circuit Board229
Mother Board-2 Schematic Diagram230
Mother Board-2 Circuit Board232
Slotmother Schematic Diagram233
Syscon Mother Schematic Diagram233
Syscon Mother and Slot Mother Circuit Boards234
Fuse Schematic Diagram234
Deck Terminal Schematic Diagram235
Deck Terminal and Cassette Housing Circuit Boards235
REC/PB y Schematic Diagram236
DV Voltage - R/P y238
REC/PB y Circuit Board240
REC/PB Color Circuit Board241
DC Voltage - R/P Color242
REC/PB Color-1 Schematic Diagram244
Burst Gate245
Wiring Table245
Main Waveforms of REC/PB Color Circuit245
REC/PB Color-2 Schematic Diagram246
DC Voltage - R/P Color 2247
REC/PB Color-2 Circuit Board249
REC/PB Adjust Schematic Diagram250
REC/PB Adjust Circuit Board251
DC Voltage - R/P Adjust252
Y Comb Schematic Diagram254
DC Voltage - y Comb255
Y Comb Circuit Board257
Output Schematic Diagram258
DC Voltage - Output260
Output Circuit Board262
PRE/REC Schematic Diagram and Circuit Board263
FM Audio PRE/REC Schematic Diagram and Circuit Board263
Audio-1 Schematic Diagram264
DC Voltage267
Audio-1 Circuit Board269
Audio-2 Schematic Diagram270
Audio-2 Circuit Board271
Audio-3 Schematic272
Audio-3 Circuit Board276
XLR (Audio-4, -5) Schematic Diagram277
XLR (Audio-4, -5) Circuit Board278
Front (Audio-6, Jack, VR) Schematic Diagram279
Front (Audio-6, Jack, VR) and A/C Head Circuit Board280
Drum/Capstan Servo Schematic Diagram281
Drum/Capstan Servo Circuit Board282
Mechacontrol/Reel Servo Circuit Board283
Mechacontrol/Reel Servo Schematic Diagram286
Syscon Schematic Diagram288
Syscon Circuit Board289
AV Micom/Onscreen Schematic290
AV Micom/Onscreen and Counter Display Circuit Boards291
Operation Schematic Diagram292
Operation Circuit Board293
Operation CPU293
Operation Key-1/2293
Rear (Rear-1 to -3) Schematic Diagram294
Rear (Rear-1 to -3) Circuit Board295
Subpanel Schematic Diagram296
Subpanel Circuit Board296
Meter Schematic Diagram297
Meter Circuit Board297
Switching Regulator Schematic Diagram298
IC Block Diagram299
Exploded Views/ Parts List309
Packing Assembly M1 Exploded View and Parts List310
Initial Setting of Front and Rear Panel Switches311
Cabinet Assembly M2 Exploded View312
Cabinet Assembly M2 Parts View313
Chassis Assembly M3 Exploded View314
Frame Assembly M4 Exploded View317
Rear Frame Assembly M5 Exploded View318
Rear Frame Assembly M5 Parts View319
Mechanism-1 Assembly M6 Exploded View320
Mechanism-1 Assembly M6 Parts List321
Mechanism-2 Assembly M7 Exploded View and Parts List322
Cassette Housing Assembly M8 Parts324
Cassette Housing Assembly M8 Exploded View325
Drum Assembly M9 Exploded View and Parts List326
Cassette Panel Assembly MA Exploded View326
Operation Panel Assy MB Exploded View326
Cassette Panel Assembly MA Parts List327
Operation Panel Assy MB Parts List327
List of Electrical Parts329

JVC BR-S822U - D;C Servo Circuit; Capstan FG Duty Factor and Level; Tracking Preset; PB Switching Point

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