Sony HP-210 - Power Transistor Replacement

|________2-13.. POWER TRANSISTOR REPLACEMENT
Fig. 2-20. Power amplifier board removal
screw
Oriver
ac outlet
Fig. 2-21. Replacing the ac outlet
2-14. CHASSIS LAYOUT
tuner and
MPX board
preamplifier board TONE control
board
1.
2.
REC/PB connector
{General Export
Model only.
1s
Remove the power amplifier board as described
in Procedure 2-11.
Remove the two screws and retaining. bracket
securing the defective power transistor to the
heat sink and PCB.
Unsolder the leads of power transistor, and
then install the new one.
When replacing the power transistor, apply a
coating of a heat-transferring grease to both
sides of the insulating mica washer. Any
excess grease squeezed out when the mounting
bolts are tightened should be wiped off with
a clean cloth. This prevents it from accumu-
lating conductive dust particles that might
eventually cause a short.
~—=————— amplok
fuse 1.6A
_C701
1,000 pF
voltage selector
(General Export
Model only,