Sansui A M7 Service Manual
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Extracted text from Sansui A M7 Service Manual (Ocr-read)
Page 2
A-M7
1. BLOCK DIAGRAM
E0 AMP
Driver/Power AMP Speakers
oSla IHLI
PHONO G ' fl 0 2 +
m E ]L
@ -
ruuen©- '35 3 Q -1
.J 1 '
AUX :3 Tone 3 +
0519 "i:I J Control
PLAY © ,, .vnzwns
TIPEA'I Bass.Trehle
REC @-
osu E
PLAY ©-c g
TKPE-Z 3
REC ©- 4 Phones
V E _°-' From R~ch
MIC fi-A
W
Mic Mixing VR From R-ch
2- BIAS CURRENT ADJUSTMENT (Refer to picture below)
DC Vol! Meter DC Voll Merer
Note:
1. Room Temperature . . ........... 18°C ~ 38°C 3. Before turning 0N power switch, turn kVRl on F6626 fully
2. For adjustment. run rh: unit for more than 3 minutes after coumgrclockwiye.
the power is switched on.
STEP SUBJECT MEASURE OUTPUT ADJUST ADJUST FOR REAMRKS
I. L-CH Connacr DC volt meter betwean kVRI (L-CH) DC 3 mV This bias current adjustment converts
emitters of k0, kQS on F3626 F4626 currenr value inm voluz: by ohms
law.
2, R-CH Same as above kVRl (ll-CH) DC 3 mV
F4626