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6-17
GY-2120WD/WS
Data Loopback Check
The operation of each block can be checked by turning back the write data as the read data in the course
of a circuit without passing through the tape. There are two loopback routes in the EQ-66 board and one
loopback route in the MA-83 board.
6-2. Command Description
Mimic Diagram of Loopback Route
C1
encoder
8-9
encoder
C2
encoder
C1
decoder
9-8
conv.
C2
decoder
DATA BUS
ASIC
ASIC
ASIC
P-S
conv.
REC curr
control
S-P
conv.
PB
EQ
MA-LP1
EQ-LP2
EQ-LP1
REC
heads
PB
heads
GY-2120
: Loopback route
Summary of Contents for GY-2120WD
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Page 437: ...7 3 GY 2120WD WS Index Mechanical Deck Overall Block 6 7 9 8 2 1 3 4 5 ...
Page 469: ...8 1 GY 2120WD WS 8 1 Section 8 Block Diagrams Frame Wiring ...
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