Sony HMK-70 - Page 18

4-7. MOUNTING DIAGRAM — Power Amplifier Board -
— Conductor Side —
2SC632A
2SC634A
8
Q709
D702
Q708
Semiconductor Location
2SA678
Q8C4
Q803
c
Ky
Q705
E
E
8
181555
cathode.
: B+ pattern
_ : B- pattern
KB-462S
VD-1220
Pe
cathode
4-8. LEVEL DIAGRAM
(dB)
30
@ +2448 (12.6 V)
20W/8Q a
20
@ +8208 (2V)
500 mW/8Q
B) REC/PR IN, —§ ——— eee SS
® TAPE @ -5aB © -1208
-5dB (440 mV) (440 mv) (195 mV)
(@ REC OUT
-10dB (250mV)
@® PHONO
REC/PB OUT
~49 dB (2.76 mV) ©
-28dB (30mV)
TAPE
% ®
REC
OUT WW TONE CONTROL POWER AMP.
PREAMP/ CIRCUIT Q701, Q702,'Q703, 0704
EQUALIZER RV301, RV302, 0301 0705, 0706, 0707, Q708
PHONO © AMP LOUDNESS SW {S6) Q709, 0710, 0711, Q712
SOURCE Q713
S4;
MONITOR
SW.
HI-FILTER SW (S7}
VOLUME
CONTROL ®&
(RV303)
O—O } SPEAKER
u 1
To fi
NE
Lis
ae
i
OUTPUT
(A)
| 1
REC/PB H i GaSe rake tesa aooss x
CONNECTOR 4--4 S3-4; PHONO SW = " \ MONO O \ 9 STEREO
) 4 } SPEAKER
(To R-CH) OUTPUT (B)
[S8& SPEAKER SW] Ll
(To R-CH) ri
_ (To R-CH)
Note: Signal voltages. are measured with ac
VTVM and expressed in dB referred
to 0.775V, 1 kHz.