Flow Chart - Yamaha P1150 Service Manual

P1150／P1250／P2150／P2250
■OIsA55EMBLY P匿OCEOURES
● Disconnect each connector as necessary for the part
remova1．
● Electric charge may be accumulated at the electro−
lytic capacitor of the power supply、Discharge it by
shorting across the capacitor terminals with a resistor
of8Ω，100W or so．
FLOW CHART
①Topooverremoval ①F"terre覇oo》aI
1dling current adlustment
OUTPUT circuit board check
DC offset check
②Fro"tpanelassemUyremoval ③PA副tremoサa1
PAA｛PAB｝circuit board removal
CooIing Fan remova1 ④Rear paoel a＄sembly remoual
④OUTPUTcirc戚boardremo》a垂
rhield bracket removaI
lNPUTcircuit board removal
①TOPCOVERREMOVALIGRILLEREMOVAL
②FRONTPANELASSEMBLYREMOVAl
9
青
笹
蔭
PA unit
｛ldIingcurrent
adjustmentl
lDCoffsetl
疹
1、眠∫二σ
賦，＼
●
⑰
◎
Top cOver
190r10screws｝
／
￥
←』 nUTPUT circuit board
詐『
＿、夢
野
e 隔
Gr耐e
14boltsl
嚇
∠
咽
L』
マ '勲
⑨ ノ癬
習離糞
：灘墾禦
Front panel assembly
Cooling Fan （6screws，etc．1