Operation Check Of Sub Trans Pcbs; Operation Check Of Function Pcb - Yamaha RX-Z9 Service Manual

2. Operation check of SUB TRANS (4), (5) P.C.B.s
1) With the amplifier unit removed, release the SUB TRANS
(4) P.C.B or SUB TRANS (5) P.C.B. and take it out.
2) Put the amplifier unit back in place (without tightening the
screw), place the SUB TRANS P.C.B. as shown in Fig. 28
and perform check and part replacement (e.g., a relay).
Fig. 27
3. Operation check of FUNCTION P.C.B.
With the cables extended, place the FUNCTION P.C.B. be-
side the main unit as shown in Fig. 29 and 30 and perform
check and repair.
• Using the tag No.3 cable, extend FUNCTION P.C.B. W11
and connect it to MAIN (L)-L P.C.B. CB301.
• Using the tag No.3 cable, extend FUNCTION P.C.B. W10
and connect it to MAIN (R)-L P.C.B. CB301.
• Using the tag No.4 cable, extend FUNCTION P.C.B. W9
and connect it to MAIN (L)-R P.C.B. CB421.
• Using 3 tag No.5 cable, extend FUNCTION P .C.B. W7 and
connect it to VIDEO TOP P.C.B. CB24.
• Using the tag No.6 cables, extend FUNCTION P.C.B. W6
and connect it to VIDEO TOP P.C.B. CB23.
FUNCTION P.C.B. W12 can be connected to MAIN (R)-R
P.C.B. CB661 without being exteded.
W8 which is HP, needs not be connected.
Fig. 29
Fig. 28
(Put an insulating sheet under the SUB TRANS circuit board
to avoid a short.)
Fig. 30
RX-Z9/DSP-Z9
29