Yamaha MR1642 Service Manual - Page 20

MR842/MR1242/MR1642 11. Removal of MR-J, J1, J2, K, M, 0, P, P1 and Q Circuit Boards • Remove the Bottom board. (see procedure 1) • Remove the hexagonal nuts retainig jacks, the circuit boards can be removed. (Fig.8) 12. Removal of MR-L Circuit Boards • Remove the bottom board. (see procedure 1) • After the 3 bind head screws 00 (3x8) have been removed, the MR-L circuit board can be removed. (Fig.8) 11. MR-J,J 1 ,J 2 ,K,M,O,P,P 1 LTi • a-vm•Lt-4.-. (1 ,q(4.) • 7, )kiftviyAff4.-)-sy ▪ (Fig.8) 12. MR-L- h (0M-1.. . • a& t 1 0 (1x•RMI.i) • V/J\I's (3 x 8) 3* 1-L, • (Fig.8) _ MR-L e MR-Q MR-O MR-M MR-K MR-P I ecne < ., " ,=•T' 102 .0 =06 -C)) 0, CO 0 0 0 0 O .._ =. O , al , CD 0 C),"; © CD © © © © - , - _ 0 © (11, 909_°S)0c). _C, _ 0 _0 4 MR-J1 0000000 ._0 " (0) r_3 00 oc oc *.. goo %.,W' 0 00 000 --, --- MR-J = Hexagonal Nut (All t ) Fig. 8 Note) MR842 MR1242 MR1642 P circuit board Ch, 1 -Ch. 8 Ch, 1-Ch. 12 Ch, 1-Ch. 12 P1 circuit board X X Ch.13-Ch.16 MR842/MR1242/MR1642 27