Hitachi HA-7700 Serviceanleitung Seite 7

@ Removing the POWER MOS FET
@ Ausbau der Leistungs—-MOS—FET
@ Déposer le transistor a effet de champ
Main amp P, W, B.@3
Hauptverst4rker P, W. B.
Amplificateur principal P, W. B,
34 x1 ODT(x 4)
ww
sure to cut off the power and pull out the power
cord. Remove the bottom plate and discharge the
power capacitors by touching it with a resistor of
approx. 10 ohms, 5 watts capacity at the positions
C873L, R and C874L, R.
When discharging through the chassis ground, there is
danger that R737 lead wire may be open and noise
becomes mixed, in this case, so be sure to discharge
between the.® and © terminals of the electrolytic
capacitor.
HITACHI HA-7700
POWER MOS FET(x 4)
wa Leistungs-MOS-FET (x 4)
Transistor a effet de champ( x 4)
34 xl ODT(x 7)@)
3% x 6DT (black)( x 2)@
"49x16DT ( x 2)06)
Fig. 3
© Indication(Black) Adjust with this
screw loosened
el {Bottom view}
jo 58mm
Installation leg
22 2mm
Fig. 4
[Side view}
QO OLIILG
©
L 402i
Circle marks
Top view of equalizer P. W. B.
Fig. 5