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GY-2120WD/WS
1-8. Boards Replacement
1-8-5. EX-603 and EQ-66 Boards
Replacement
1.
Turn off the power and remove the power cord.
2.
Remove the three screws (B4
x
5), then remove the
upper lid. (Refer to section 1-1-1.)
3.
Remove the eight screws (B3
x
6), then remove the
rear panel.
4.
Disconnect the four connectors (CN1, CN51, CN52
and CN53) on the switching regulator.
5.
Remove the two screws (PWH3
x
6), then remove the
switching regulator from the main unit.
6.
Remove the EQ-66 board.
7.
Disconnect the four connectors (CN251 to CN254).
8.
Remove the four screws (BVTT3
x
6).
9.
Install each board in the main unit in the reverse order
of removal.
Rear panel
B3
x
6
B3
x
6
B3
x
6
B3
x
6
Switching regulator
CN1
CN53
CN52
CN51
PWH3
x
6
PWH3
x
6
EQ-66 board
EX-603 board
CN254
CN252
CN251
CN253
BVTT3
x
6
BVTT3
x
6
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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