Dcin (1/2, 2/2) Circuit Boards; Haad (1/2, 2/2) Circuit Board - Yamaha M7CL-32 Service Manual

M7CL-32/M7CL-48
B-3. DCIN (1/2, 2/2) Circuit Boards
(Time required : About 5 minutes each)
B-3-1 Remove the front plate. (See procedure 1)
B-3-2 Fix the control panel 2 assembly. (See procedure 3)
B-3-3 DCIN (1/2) Circuit Board:
B-3-3-1Remove the six (6) screws marked [920A]. The
DCIN (1/2) circuit board can then be removed.
(Fig.9)
B-3-4 DCIN (2/2) Circuit Board:
B-3-4-1Remove the six (6) screws marked [920B]. The
DCIN (2/2) circuit board can then be removed.
(Fig.9)
* There are DIP switches for selecting channels
(SW501) in the DCIN circuit boards. (Fig.9, Photo 10)
The channel assignment for the DCIN (1/2) circuit
board and DCIN (2/2) circuit board are as follows:
P.C.B. Channel assignment
DCIN (1/2) circuit board
CH 9—16
CH 17—24
DCIN (2/2) circuit board
CH 25—32
C. Disassembly Procedure of Bottom Assembly section underneath Control Panel 3 Assembly (M7CL-48 only)
C-1. Cannon Connector
C-1-1 Remove the front plate. (See procedure 1)
C-1-2 Fix the control panel 3 assembly. (See procedure 4)
C-1-3 Remove the two (2) screws marked [860B]. The
cannon connector can then be removed. (Fig.11)
C-2. HAAD (1/2, 2/2) Circuit Board
C-2-1 Remove the front plate. (See procedure 1)
C-2-2 Fix the control panel 3 assembly. (See procedure 4)
C-2-3 Remove the cannon connector. (See procedure C-1)
* When replacing the cannon connector, cut the
cord holder and remove together with the ferrite
core. (Fig.12)
C-2-4 HAAD (1/2) Circuit Board (Time required: About
7 minutes):
C-2-4-1Remove the sixteen (16) screws marked [750F] and
two (2) screws marked [760F]. The HAAD (1/2)
circuit board can then be removed. (Fig.11, 12)
38
SW501
1
CH 1—8
ON ON
OFF ON
• DIP Switch (SW501)
(Time required: About 4 minutes)
2
Photo 10
DCIN