Yamaha A-s300 Service Manual
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Page 11
11 A-S500/A-S300 A-S500/A-S300 OPERATION (1) P.C.B. MAIN (6) P.C.B. MAIN (5) P.C.B. (J model) OPERATION (7) P.C.B. (R model) MAIN (2) P.C.B. DOCK P.C.B. FUNCTION (2) P.C.B. FUNCTION (3) P.C.B. FUNCTION (1) P.C.B. MAIN (4) P.C.B. MAIN (1) P.C.B. MAIN (3) P.C.B. POWER TRANSFORMER OPERATION (11) P.C.B. OPERATION (8) P.C.B. OPERATION (6) P.C.B. OPERATION (3) P.C.B. OPERATION (4) P.C.B. OPERATION (5) P.C.B. OPERATION (9) P.C.B. OPERATION (2) P.C.B. OPERATION (10) P.C.B. Top view Front view1 2 3 4 5 6 7 8...
Page 12
12 A-S500/A-S300 A-S500/A-S300 Top cover Ä¿Ó § Ì ” Front panel unit ÑéïÄÍÉçâÇ¿Ä Knob VOL ÊÒ70- Knob INPUT ÊÒ*/165 Knob TC ÊÒ5$ Knob SP13 ÊÒ41 Cap POWER ©ß¿Ó108&3 Cap DIRECT ©ß¿Ó%*3&$5 Frame top
Page 13
13 A-S500/A-S300 A-S500/A-S300 Sub-chassis unit ±Ò³ß”³âÇ¿Ä Hook Ñ¿« Hook Ñ¿«FUNCTION (1) P.C.B. DOCK P.C.B.FUNCTION (2) P.C.B. FUNCTION (3) P.C.B. CB101CB108 CB503 CB2CB21CB14CB506 CB504CB505 CB706 CB853CB854 CB851 Š Š Œ ‹ Fig. 3 Fig. 2 3. Removal of Sub-chassis Unit a. Remove 2 screws ( Š). (Fig. 2) b. Remove CB101, CB108, CB503-505, CB706, CB851 and CB853-854. (Fig. 2) c. Release 2 hooks and then remove the sub-chassis unit. (Fig. 2) 4. Removal of FUNCTION (1)–(3) and DOCK...
Page 14
14 A-S500/A-S300 A-S500/A-S300 Ground lead ž”µ ¢Sub-chassis unit ±Ò³ß”³âÇ¿Ä Rubber sheet and cloth
Page 15
15 A-S500/A-S300 A-S500/A-S300 Chassis cover ³ß”³§Ì” Rubber sheet and cloth ° Ü ³ ”Äq Í Ž Ž Ž MAIN (1) P.C.B. Fig. 5 When checking the MAIN (1) P.C.B.: • Spread the rubber sheet and the cloth. Then place this unit on the cloth upside down. (Fig. 5) • Remove 6 screws ( Ž) and then remove the chassis cover. (Fig. 5) .*/
Page 16
16 A-S500/A-S300 A-S500/A-S300 When the following parts are replaced, the firmware must be updated to the latest version. FUNCTION P.C.B. Microprocessor (IC502: FUNCTION P.C.B.) ● Confirmation of firmware version Before and after updating the firmware, check the firmware version by using the self-diagnostic function menu. Start up the self-diagnostic function, have the firmware version displayed, and note them down. (See “SELF-DIAGNOSTIC FUNCTION”) * When the firmware version is different from...
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17 A-S500/A-S300 A-S500/A-S300 Serial port (RS-232C)³æžç Ù ”Ä
Page 18
18 A-S500/A-S300 A-S500/A-S300 Ô â^MO
Page 19
![Page 19
19
A-S500/A-S300
A-S500/A-S300
Fig. 4
Fig. 5
115200
40
5. Click [Setting], and set the baud rate. (Fig. 4)](http://img.usermanuals.tech/thumb/83/93203/w300_d_1504007148-yamaha-a-s300-service-manual_d-18.png "Page 19
19
A-S500/A-S300
A-S500/A-S300
Fig. 4
Fig. 5
115200
40
5. Click [Setting], and set the baud rate. (Fig. 4)")
19 A-S500/A-S300 A-S500/A-S300 Fig. 4 Fig. 5 115200 40 5. Click [Setting], and set the baud rate. (Fig. 4)
Page 20
20 A-S500/A-S300 A-S500/A-S300 10. Disconnect the power cable of this unit from the AC outlet. 11. Remove the RS-232C conversion adaptor and flexible flat cable from the writing port of this unit. 12. Connect the power cable of this unit to the AC outlet, start up the self-diagnostic function and check that the firmware version is the same as written one. (See “Confirmation of firmware version”)