JVC BR-S822U Service Manual

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Table of Contents

General Description

Table of Contents

3
Table of Contents
4
Safety Precautions
5
Safety Check after Servicing
6
General Description
6
Detail of Alterations
7
Mechanism Adjustment
7
Changes in Mechanism Assembly
8
A/C Head - Change
9
Pinch Roller Arm Assembly - Change
9
Mode Motor - Change
9
Pinch Roller Solenoid Position - Addition
10
Full Erase Head - Addition
10
Pole Base Assembly - Change
11
Electrical Adjustment
11
Audio Rec Level VR Setting and Audio Level Meter Adjustment
11
Normal Audio Playback Level Adjustment
11
Normal Audio Playback Frequency Response
12
Audio Bias Frequency and Level
12
Normal Audio REC/PB
13
Normal Audio PB Frequency Response - REC/PB
14
Full Erase Frequency
14
BR-S822U Audio Insert Erase Voltage
14
BR-S622U Audio Post-Recording Erase Voltage
15
BR-S822U Normal Audio Insert Crosstalk Cancel
15
BR-S622U Normal Audio Post-Recording Crosstalk Cancel
15
BR-S822 U Normal Audio Insert Bias Trap
15
BR-S622 U Normal Audio Post-Recording Bias Trap
16
BR-S822U Time Code Bias Trap
16
Hi-Fi Audio Carrier Frequency
16
Hi-Fi Audio FM Output Level
16
Hi-Fi Audio PB Level
17
Audio Circuit - BR-S522U/BR-S525U
19
Diagrams and Circuit Boards
19
Expression of Connector
19
Expression of Wiring
19
Signal Flow on the Diagram
20
Circuit Board Locations
21
Overall Wiring Diagram
27
Mother-1 Schematic Diagram
29
Mother-1 Circuit Board Diagram
30
Mother-2 Schematic Diagram
32
Mother-2 Circuit Board Diagram
33
Audio-3 Circuit Board Diagram
34
Audio-3 Schematic Diagram
36
AV Micom/Onscreen Circuit Board Diagram
37
AV Micom/Onscreen Schematic Diagram
38
Mother-1 Circuit Board
39
Exploded Views and Parts List
40
Exploded Part Number Coding
40
Packing Assembly M1
41
Packing Assembly M1 Parts List
42
Cabinet Assembly M2 View
43
Cabinet Assembly M2 Parts List
44
Chassis Assembly M3 View
45
Chassis Assembly M3 Parts List
46
Frame Assembly M4 Parts List
47
Frame Assembly M4 View
48
Rear Bracket Assembly M5 View
49
Rear Bracket Assembly M5 Parts List
50
Mechanism 1 Assembly M6 View
51
Mechanism 1 Assembly M6 Parts List
52
Mechanism 2 Assembly M7 View
53
Mechanism 2 Assembly M7 Parts List
54
Cassette Housing Assembly M8 Parts List
55
Cassette Housing M8 View
56
Drum Assembly M9A/M9B View and Parts List
57
Electrical Parts List
61
Front Panel Assembly
61
Cassette Panel Assembly MA View and Parts List
62
Operation Panel Assembly MB View and Parts List
64
AV M/ONSC Board Assy 41 Parts List
69
Specifications
71
Comparison Table of Different Parts and Function by Model
74
Precautions During Servicing
78
Precautions
78
Features
79
Controls and Connectors
81
Front Sub-Panel Overview
82
Rear Panel
83
Connections - Video Equipment
83
Connections - Audio Equipment
84
Reference Sync Signals for Recording and Playback
84
Loading and Unloading Video Cassettes
85
On-Screen Displays
85
Playback
86
Shutter Search
86
Jog Search
86
Rewind and Fast-Forward
86
Preroll Playback
87
Recording
87
Recording Level Adjustments
87
Record-Pause and Assemble Editing
88
Time Code/User Bits Recording/Playback
88
ID Code
88
Time Code Editing
88
Preset Recording
89
Guide to Editing
89
Regenerated Recording
89
Quick Guide to Editing Techniques
90
Editing Connections
90
Connections for Swap Editing
90
Connections for A/B Roll Editing
91
Manual Editing
91
Preparing Recording Tapes for Editing
91
Preroll Editing
92
Automatic Editing
92
Run Editing
93
On-Screen Edit Data Display
94
Counter Display
95
Setup Menu
99
ROM Version/Hour Meter Display
100
Warning Display
100
Diagnostic Codes
101
Test Points
101
Automatic Equaliser
101
Installation
101
Rack Mounting
102
Connector Specifications
104
Controls and Connectors Overview
106
Front Sub-Panel
108
Audio Dubbing
108
Menu Settings
113
Removal of External Covers
114
Removal of Main Boards
117
Internal Switches
117
RP y Switches
117
R/P Color 2 Switches
117
R/P Adjust Switches
118
Y Comb Switches
118
Output Switches
119
M. CTL & R. Servo Switches
120
TBC-1 Switches
120
TBC-3 Switches
121
Time Code G/R Switches
121
45 Pin Main Switches
121
RS-232C Switches
122
Memory Switch Initialization
122
Indication of ROM and Microprocessor Versions
123
7-Pin Cable
124
When in Trouble
124
To Take Cassette out of Set Manually
124
Video System Problems
125
Audio System Problems
125
Operational System Problems
125
Syscon System Problems
126
Mechanism System Problems
126
Check of Supply Voltage
127
Protocol of 9-Pin Remote Connector
127
Specification of 9-Pin Connector
127
Communication Format
128
Command Format
128
Command Table
131
Command from Controller
137
BR-S822E/622E/522E Status Data
139
Return from Device
141
Detail Timing Chart
142
Wide Aspect ID
142
Adjustment Mode
143
Mechanism Adjustment Description
143
Jigs and Special Tools for Mechanism Adjustment
143
Mechanism Operation Check
144
Precautions Replacement of Main Parts
145
Location of Main Parts
146
Cleaning
146
Oiling and Greasing
147
Replacement of Main Parts
147
Cassette Housing Assembly Replacement
148
Cassette Housing Motor Replacement
149
Brush Assembly Replacement
150
Upper Drum Assembly Replacement
152
Centering of Upper Drum - to Remove Upper Drum Wobbling in the Rim
152
Cautions to Handle Microchecker
153
Drum Assembly Replacement
154
A/C Head Replacement
155
Mechanism Assembly Replacement
155
Tension Arm Replacement
155
Pinch Roller Arm Assembly Replacement
156
Capstan Motor Replacement
156
Reel Motor Replacement
156
Loading Motor Replacement
157
Main Brake, TU Sub Brake Replacement
157
Pole Base Assembly Replacement
158
Assembling of Mechanism
159
Mechanism Parts Arrangement
160
Adjustment of Reel Servo Circuit
160
Tension Sensor Position
161
Arrangement of Test Points and Vrs
161
Hall Element Output Bias
161
Hall Element Output Gain
162
Loading Torque
163
Reel FG Duty
163
Play Mode Back Tension
163
Reverse (X1) Torque
164
Tension Warning Data Setting
165
Interchangeability Adjustment
165
Names of Main Parts
165
FM Waveform Check
166
Linearity Adjustment
168
A/C Head Adjustment
169
X Value Adjustment
170
Adjustment of Tape Transport System
170
Supply Guide Roller Height Adjustment
171
Take-Up Guide Pole Height Adjustment
171
Guide Arm Foller Height Adjustment
172
Tension Pole Perpendicularity (Vertical Centering) Check
173
Electrical Adjustments
173
Required Tools and Test Instruments
174
Specification of Alignment Tapes
175
Signals Required for Video System Adjustment
176
Main Boards Location
176
Initial Setting of Front and Rear Panel Switches at Shipment
177
Explanation of Main Columns in Check and Adjustment
177
Check Point Column
177
Signal Column/Mode Column
177
About RAP Mode
178
D/C Servo Circuit
178
Capstan FG Duty Factor and Level
178
Tracking Preset
178
PB Switching Point
179
Audio Circuit
179
Audio REC Level VR Setting & Audio Level Meter Adjustment
179
Normal Audio Playback Level
179
Normal Audio Playback Frequency Response Check and Adjustment
180
Audio Bias Frequency and Level Check and Adjustment
180
Normal Audio REC/PB Check and Adjustment
181
Normal Audio PB Frequency Response (REC/PB)
182
Full Erase Frequency Check and Adjustment
182
BR-S822 Audio Insert Erase Voltage
182
BR-S622 Audio Post-Recording Voltage
183
BR-S822 Normal Audio Insert Crosstalk Cancel
183
BR-S622 Normal Audio Post-Recording Crosstalk Cancel
184
BR-S822 Normal Audio Insert Bias Trap
184
BR-S822 Time Code Bias Trap
184
Hi-Fi Audio Carrier Frequency Check/Adjustment
184
Hi-Fi Audio FM Output Level Check/Adjustment
185
Hi-Fi Audio PB Level Check/Adjustment
185
Hi-Fi Audio REC FM Level
185
Hi-Fi Audio REC/PB Level
186
Video Circuit
186
Vcxo/Agc
186
Video Input Level
186
Y/C 443 y Input Level
187
E-E Color Input Level
187
Video Level Meter
187
Sub-Emphasis Input Level
188
Carrier and Deviation
188
White and Dark Clip
189
S-VHS Mode Detection - PB Mode
189
Modulation Balance
189
PB Sub-Demphasis
190
RF Equalizer
191
REC FM Level
192
REC Frequency Response
193
Tracking Meter
193
Y Output Level
193
PB VCO/PB Subcarrier
193
E-E Pilot Burst Phase
194
REC Color Level
195
DG Comp
196
E-E Pilot Burst Level
196
Color DOC
196
Crosstalk Cancel
197
Cnr
197
CNR Feedback Ratio
198
PB Pilot Burst Phase Detct
198
CRI Equalizer
198
Afc
199
REF. Burst
199
Color Output Level
200
Auto Equalizer
201
Pilot Burst Delete
201
S-VHS Sideband Comparator
201
REC Y/C Delay
202
PB Y/C Delay
202
2Fc Cancel
202
ADD V Pulse
203
On Screen
203
VITC SEP Clamp Voltage
204
Location of Test Points and Adjustment Parts
206
Sub Panel Circuit
206
Video Phase
206
Genlock SC Phase
207
Diagrams and Printed Circuit Boards
208
Key to Abbreviations
210
Replacing Subminature "Chip" Parts
211
Shapes of Transistors and Diodes
212
Locations of Circuit Boards
213
REC/PB y Block Diagram
214
REC/PB Color-1 Block Diagram
215
REC/PB Color-2 Block Diagram
216
R/P Adjust Block Diagram
217
Output Block Diagram
218
Y Comb Block Diagram
219
Drum/Capstan Servo Block Diagram
220
Hi-Fi Audio Block Diagram
221
Normal Audio Block Diagram
222
AV Micom/Onscreen Block Diagram
223
Syscon Block Diagram
224
M-CTL and Reel Servo Block Diagram
225
Wiring Diagram

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This manual is also suitable for:

Br-s622u Br-s522u Br-s525u

JVC BR-S822U Service Manual

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