Cannon Connector; Haad (1/5—5/5) Circuit Board - Yamaha M7CL-32 Service Manual

M7CL-32/M7CL-48
B. Disassembly Procedure of Bottom Assembly section underneath Control Panel 2 Assembly
B-1. Cannon Connector
B-1-1 Remove the front plate. (See procedure 1)
B-1-2 Fix the control panel 2 assembly. (See procedure 3)
B-1-3 Remove the two (2) screws marked [860A]. The
Cannon connector can then be removed. (Fig.9)
B-2. HAAD (1/5—5/5) Circuit Board
B-2-1 Remove the front plate. (See procedure 1)
B-2-2 Fix the control panel 2 assembly. (See procedure 3)
B-2-3 HAAD (1/5) Circuit Board (Time required: About
7 minutes):
B-2-3-1Remove the sixteen (16) screws marked [750A],
and two (2) screws marked [760A]. The HAAD (1/
5) circuit board can then be removed. (Fig.9, 10)
B-2-4 HAAD (2/5) Circuit Board (Time required: About
10 minutes):
B-2-4-1Remove the HAAD (1/5) circuit board. (See
procedure B-2-3)
B-2-4-2Remove the sixteen (16) screws marked [750B],
and two (2) screws marked [760B]. The HAAD (2/
5) circuit board can then be removed. (Fig.9, 10)
B-2-5 HAAD (3/5) Circuit Board (Time required: About
7 minutes):
B-2-5-1Remove the sixteen (16) screws marked [750C] and
two (2) screws marked [760C]. The HAAD (3/5)
circuit board can then be removed. (Fig.9, 10)
B-2-6 HAAD (4/5) Circuit Board (Time required: About
10 minutes):
B-2-6-1Remove the HAAD (3/5) circuit board. (See
procedure B-2-5)
B-2-6-2Remove the sixteen (16) screws marked [750D] and
two (2) screws marked [760D]. The HAAD (4/5)
circuit board can then be removed. (Fig.9, 10)
B-2-7 HAAD (5/5) Circuit Board (Time required: About
13 minutes):
B-2-7-1Remove the HAAD (3/5) circuit board. (See
procedure B-2-5)
B-2-7-2Remove the HAAD (4/5) circuit board. (See
procedure B-2-6)
B-2-7-3Remove the sixteen (16) screws marked [750E] and
two (2) screws marked [760E]. The HAAD (5/5)
circuit board can then be removed. (Fig.9, 10)
* The circuit boards from HAAD (1/5) through
HAAD (5/5) are used for the following channels:
· HAAD (1/5) circuit board: INPUT CH 1—8
· HAAD (2/5) circuit board: INPUT CH 9—16
· HAAD (3/5) circuit board: ST IN CH 1—4
· HAAD (4/5) circuit board: INPUT CH 17—24
· HAAD (5/5) circuit board: INPUT CH 25—32
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(Time required: About 4 minutes)