Removal Of Rear Unit; Removal Of Amp Unit - Yamaha RX-V1800 Service Manual

6. Removal of Rear Unit

a. Remove 11 (U, C, T, A, B, G, E models) / 13 (R, L mod-
els) screws (D) and 4 (U, C, R, T, A, B, G, E, L models)
/ 2 (K model) screws (E). (Fig. 6)
b. Remove 4 screws (F) and screw (G). (Fig. 8)
c. Remove screw (H). (R, K, A, L models) (Fig. 8)
d. Remove CB16-18, CB20, CB21, CB303, CB405,
CB406 and CB407. (Fig. 8)
e. Remove the rear unit and MAIN (2) P.C.B.. (Fig. 8)
Rear unit
CB303 CB405 CB406 CB407
F
MAIN (2)
P.C.B.
F CB21 CB20 CB17 CB16
When checking the DSP P.C.B.:
• Put the rubber sheet and cloth over the equipment.
Then place the P.C.B.s upside down on the cloth and
check it. (Fig. 9)
• Reconnect all cables (connectors) that have been dis-
connected. Be sure to use the extension cable before
servicing the following section.
FL (1) P.C.B. CB901_FL (2) P.C.B. CB970:
MF126500 (26P, 500mm)
FL (2) P.C.B. CB971_OPERATION (2) P.C.B. CB803:
MF115500 (15P, 500mm)
• When connecting the flexible flat cable, be careful
with polarity.
• In main unit, the ground of rear unit is connected to the
main unit. When this rear unit are removed from main
unit, connect the ground to the main unit , using a ground
lead or the like. (Fig. 9)
D E
F G
F
CB18
H
(R, K, A, L models)
G
Fig. 8
FUNCTION (1) P.C.B.
MF126500
CB970
CB971
MF115500
CB901
CB803

7. Removal of Amp Unit

a. Remove 2 screws (I), 5 screws (J) and 2 screws
(K). (Fig. 10)
b. Remove CB6, CB11, CB15 and CB253. (Fig. 10)
c. Remove the amp unit. (Fig. 10)
J
CB11 CB15
CB6
I
K
RX-V1800/HTR-6190/DSP-AX1800
Rear unit
DSP P.C.B.
Ground lead
Rubber sheet and cloth
Fig. 9
I J K
CB253
J
Amp unit
Fig. 10
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