Yamaha AD8HR Service Manual page 104

K J
MAIN CIRCUIT BOARD 008 (AD8HR)
1
2
to DC-CN004
3
4
5
6
7
8
28CC1-8829580-8
7
14
I H G
DC-DC CONVERTER
AND
to DC-CN003
: not installed (実装しない)
( O S ) : Electrolytic Cap. (有機半導体アルミ固体電解コンデンサ)
F E D
REGULATOR +3.3V
REGULATOR +2.5V
REGULATOR -5V
NJM79L05UA(XN086A00)
REGULATOR -5V
IC984
C B A
AD8HR
µPC2933AT-E1 (X0638A00)
LM2676SX-5.0 (X3508A00)
DC-DC CONVERTER
REGULATOR +3.3V
IC981 IC982
Tab is
µ PC2925T-E1 (X0637A00)
Ground
REGULATOR +2.5V
IC983
1
2
3
1: SWITCH 4
5
OUTPUT
6
2: INPUT
7
2
3: C BOOST
1
4: GROUND
5: NO CONNECTION
6: FEEDBACK
7: ON/OFF
DE5S4M (V2330500) 1FWJ43IV (V5454500)
DIODE
DIODE
D981 D982-987
4
1
2
3 2
1
1: V in 2
3
2: GND
1: COMMON
3: V out
2: INPUT
4: GND
3: OUTPUT
MAIN CIRCUIT BOARD 008 (AD8HR)
4
1: V in
2: GND
3 3: V out
4: GND
1
1: ANODE
2: CATHODE