Yamaha r 3 schematic
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Page 1
I INTERNAL VIEW '
OPOWER TRANSFORMER
U.S.A. model: GA68800
Canadian model: GA68810
General model: GA68820
European model: GA68830
Australian 81 British models: GA68840
0AM LOOP ANTENNA
0AM lC: LA1245
oFRONT END PACK
GPOWER SWlTCH
(534 BIT CPU IC: LC7030
OPLL lC: LM7000
$MPX IC: LA3400
QFM IF IC: LA1235
\ I DISASSEMBLY PROCEDURES
l 1. Removal of Top Cover 3. Check of Main Circuit Board (1) 8: replacement of l
Remove 7 screws ( CD ) in Fig. 1, and slide the Top parts.
Cover back. a. Remove 12 screws ( (S l in Fig. 1. l
2. Removal of Front Panel b. Push the Power switch on. i
Remove 4 screws ( C2D) and 4 hooks in Fig. 1, and pull 0. Remove the Main Chassis as shown in Fig. 2
the Front Panel fonNard. In this condition it is possible for you check the Main
Circuit Board (1) and replace the parts.
Main
Circuit Board (1)
Main Chassis
v
Fig. 2