Sansui A M9 Service Manual

Page 2

A-M

1. BLOCK DIAGRAM

P .
E0 AM Driver/Power AMP Speakers ._

0513 NR! IRL1
PHONO (-2 . fi g V + ]L
g ;2 m a -
TUNER ©- 051 'u g _
3 ' , J.
+ - .,
AUX g Tone
' 0519 0 Control -
r- PLAY @_--0 , , iVR2.jVR3 \
T PEJ Bass,Treble -
REC ©__- 5
051]
PLAY ©__.__-o _
T PE-2
Servo Amp; 0J2 Phones

gvm MIC AMP [wall/V
v.E._a--p- A 21'
MIC I 5 nlC1 -" , 3
- V

Protector J
+ W

W |RL1 , . I

oJl

w
MIC Mxing VR Fm R'c"

2. BIAS CURRENT ADJUSTMENT(Refertopicturebelow)

[5.1
r $ :

Note:
....... 18°C~38°C 3. Before turning ON POWER switch, turn kVRl on F-3700

1. Room Temperature ..... .
2. For adjustment, run the unit for more than 3 minutes after fully counterclockwise.

the power is swhched on.
STEP SUBJECT ' MEASURE OUTPUT ~ ADJUST ADIUST FOR REMARKS
1. LCH Connect DC volt meter between kVR1 (L-CH) DC 3mV This blas current adjustment converts -«
emltters of.kQ., H); on F-3700 F-3626 current value into voltage by ohms
law.
2. R-CH Same as above kVRl (R-CH) DC 3 mV
F-3626