Yamaha U3-SILENT Service-Handbuch - Seite 8
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SILENT SB SERIES
6.
Switch Boax Unit
(time required: about 1 minutes)
6-1 Loosen the four (4) screws marked [41S]. The switch
box unit can then be removed. (Fig. B-5)
7.
HP(1/2) Circuit Board
(time required: about 3 minutes)
7-1 Remove the switch box unit. (See Procedure B-6.)
7-2 Remove the VOLUME knob and REVERB knob.
(Fig. B-6)
7-3 Remove the two (2) hexagonal nuts marked [C]. The
HP(1/2) circuit board can then be removed. (Fig. B-6)
8.
HP(2/2) Circuit Board
(time required: about 3 minutes)
8-1 Remove the switch box unit. (See Procedure B-6.)
8-2 Remove the two (2) screws marked [21G]. (Fig. B-6)
8-3 Remove the two (2) hexagonal nuts marked [D]. The
HP(2/2) Circuit Board can the be removed. (Fig. B-4)
8
[41S]
Switch box unit
[41S]: Truss Head Tapping Screw-1 4.0X12 MFZN2BL (03747270)
Rear View
Top View
Switch Box Unit
HEADPHONE jacks
Front View
POWER
OFF
ON
VOLUME
MAIN switch
VOLUME knob
[21G]: Bind Head Tapping Screw-P 3.0X12 MFZN2BL (VC161100)
(Fig. B-5)
AUX IN/OUT jacks
[21G]
[D]
HP
2/2
HP
1/2
HEADPHONES
REVERB
[C]
REVERB knob
(Fig. B-6)