Yamaha HS50M Manual de serviço - Página 13

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HS50M

TRANS Circuit Board and Power Trans-

former

(Time required: about 2 minutes)

6-1

Remove the rear panel assembly. (See procedure 3.)

6-2

Remove the four (4) screws marked [130]. The TRANS

circuit board with the power transformer can then be

removed. (Fig. 3)

6-3

Unsolder the power transformer mounting solder (6

locations) and separate the power transformer from

the TRANS circuit board.

The power transformer is not a component of the

TRANS circuit board.

AC INLET Circuit Board

(Time required: about 2 minutes)

7-1

Remove the rear panel assembly. (See procedure 3.)

Unsold soldered parts (2 locations) of the power

switch.

7-2

Remove the two (2) screws marked [150]. (Fig. 3)

7-3

Unsold the soldered part of the AC inlet grounding

wire and remove the AC INLET circuit board.

(Photo. 4)

[130]

Fig. 3

[110]: Bind Head Tapping Screw-S 3x10 (WG341400)

[115]: Bonding Tapping Screw-B 3x10 (WH042000)

[130]: Bind Head Tapping Screw-S 4x10 (WG341300)

[150]: Bind Head Screw-S 3x15 (WG341500)

LEVEL Knob

[110]

[115]

[150]

AC INLET Circuit Board

Photo. 4

Photo. 5

HS80M/HS50M

Power Switch

Solder

AC Inlet

[D]

[E]

[F]