Technics SU-7700 Service Manual

m= TO REMOVE CABINET _
2 Cabinet
1. Remove four (4) cabinet-mounting screws, nos.@) wb
~ @ as shown in fig. 1.
2. Remove cabinet from chassis in arrow direction 1 to
2, as shown in fig. 1. ZS
3. To reassemble, reverse above procedure. :
m@ TO REMOVE CHASSIS
1. Remove cabinet from chassis. (Refer to ‘“To remove
cabinet’’).
2. Remove lead wire from lead clamps. (Refer to
Fig: 7).
ss 3. Remove two (2) electrolytic capacitor - bracket-
5 mounting screws. (Refer to Fig. 2: 2 and@)).
4. Remove bracket of electrolytic capacitors.
LEAD CLAMP 5
circuit board- metal clamp.
LEAD CLAMP
Fig. 2
6. Remove two (2) printed circuit board- mounting
screws. (Refer to Fig. 2: 4) and ©) )
7. Remove four (4) panel-mounting screws. (Refer to
Fig. 2:@and@, left and right side.)
8. As photo in Fig. 3, hold the panel at its side ends
abd push it downward tilting sligntly its top part to
the frontward direction.
9. Remove the front panel from the chassis. (Fig. 4 to
Fig. 5).
10. Set the printed circuit board on the chassis as indi-
cated in Fig. 6.
11. The front panel can be reset in the reverse sequence.
12. Mount the lever switch bracket inside the chassis
prior to resetting the front panel. (Fig. 6)
Fig. 3
Lever \_Switch
Bracket
®
CHASSIS ;
® RIGHT SIDE
Fig.
4
Fig.
5
Fig.
6
SU-7700
[3)

Technics SU-7700 Specifications

General

Damping factor	30
Input sensitivity	2.5mV (MM), 150mV (line)
Output	150mV (line)
Speaker load impedance	4Ω to 16Ω
Power output	50 W per channel into 8Ω (stereo)
Signal to noise ratio	95dB (line)
Channel separation	55dB (MM)