7-1
7-1
Board Name
Circuit Function
(Part No.)
CP-282
Rear panel connector board (RF adaptor)
AC-139
AC connector board with breaker
SOPS-1019C
Switching regulator
SOPS-1042A
Switching regulator (inc. SOPS-1019C/1042S boards)
SOPS-1042D
Switching regulator (AC-DC)
SOPS-1042S
Switching regulator
MB-441
Mother board
HN-181
Connection board (Drum/Capstan/Reel-shift motors, CTL head, DT-34/HN-184/HN-185/PTC-59/PTC-71
boards)
HN-184
Connection board (Threading motor, Tape end sensor, and PD-35/PTC-54/TR-78 boards)
HN-185
Connection board with dew sensor (Tape top sensor, Cassette compartment, TR-79 board, Slip ring)
Section 7
Block Diagrams
7-1. Circuit Function of Printed Circuit Board
Board Name
Circuit Function
(Part No.)
VPR-1
Video signal processor, D/A, Reference clock generator, Composite encoder
(A-8275-911-A: for PAL)
(A-8275-912-A: for NTSC)
APR-1
Audio signal processor, D/A interface
(A-8275-919-A: for PAL)
(A-8275-908-A: for NTSC)
DPR-36
Digital data processor (Decode, Error correction)
(A-8275-903-A: for PAL)
(A-8275-904-A: for NTSC)
EQ-45
PB RF equalizer
(A-8275-358-A: for PAL)
(A-8275-360-A: for NTSC)
CUE-1
CUE/LTC PB circuits
(A-8275-909-A: for PAL)
(A-8275-910-A: for NTSC)
SS-52
System, Servo, Digital DT control
(A-8275-913-A: for PAL)
(A-8275-902-A: for NTSC)
DT-34
DT driver
DR-200
Motors driver (Drum, Capstan, S/T reels, Threading, Reel shift, Cassette up/down)
Solenoids driver (Pinch, S/T brake, Cleaning)
CCM-15
Threading motor / Reel-shift motor
PD-35
Pinch solenoid connection
PTC-54
Threading FG
PTC-59
Cassette’s tabs sensor
PTC-71
Reel position sensor
RM-82
S/T reel motor
SE-228
S/T reel FG
TR-78
S tension sensor
TR-79
T tension sensor, Thread/Unthread end sensor
CL-29
Cassette up/down motor, Cassette down sensors
PC-70
Cassette-in sensor, Cassette size sensor
FP-58
Upper panel function (SWs, LEDs) control
VR-152
Phone level RV, Phone connector
VR-207
Audio PB level circuit
SWC-17
Monitor select VTR status indicators (SWs, LEDs)
SWC-19
System set-up panel function control
KY-231
Lower control panel function
DP-176
Time counter display
PTC-69
Search dial sensor, Dial solenoid connection
CP-279
Rear connector board (Analog video) with output drivers
CP-280
Rear connector board (Analog audio)
Summary of Contents for DVW-522
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Page 50: ...2 10 Top view of casssette compartment 2 4 1 Printed Circuit Board Locations Top view ...
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Page 136: ...7 2 7 2 OVERALL 1 4 OVERALL 1 4 7 2 Overall Signal Processing System OVERALL 1 4 DVW 522 522P ...
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