Technics ST-CH505 - Maintenance and Power Supply; Foot Component Replacement; PCB Power Supply Procedures

ST-CH505
Replacement of the Foot.
1. Remove the 4 heat melted posts on the bottom board ass'y witha
pair of nippers or similar tool.
2. To replace the foot (RKA001 1A-2) on the bottom board ass'y,
melt
the
4
posts
with
a
soldering
iron.
Ete
5
es
Heat meited posts
Foot
Bottom board assy Soldering iron
Foot
(RKAO011A-2)
@ Power Supply with Tuner ST-CH505
Power Supply to Main PCB
1.
Apply
11
V
AC
power
between
C901
and
C902
using
the
service
tool
for
AC
power
supply
as
shown
below.
(The
unit
comes
to
STAND
BY
Mode.)
2.
Short
the
point
[P-sw]to
the
cathode
side
of
diode
D908
as
shown
below.
FL
display
tube
lights
and
the
unit
comes
to
power
ON
mode.
Power Supply to Tuner PCB
1.
Apply
15
V
DC
power
to
[J912Jand
using
the
service
tool
for
DC
power
supply
as
shown
below.
Note:
When
applying
DC
power,
connect
between
GND
and[CT]using
the
tool.
CNSO!IA CN8O02A CNSO3A
(J716)
SHORT : POWER "ON"
(Main P.C.B.)
DC POWER SUPPLY