Samsung MAX-805 Service Manual page 22

5-1-9 AGC Stability Circuit
The gain is adjusted by AGC Block with the function of maintainning the definite RF peak to peak level,
after the operation of RF envelop detection and comparing with reference voltage.
RFO level is kept stable in 1Vp-p, and input to EFM Slice.
5-1-10 Post Filter
The adjustment of audio output gain and the integration of possible de-emphasis output are executed by
the low pass filter. If the control by MUTE signal from micom exist, and when input signal absent, two
channel of right and left is builted in.
5-1-11 Center Voltage Generation Circuit
The Center Voltage is generated by using resistor dividing voltage.
Samsung Electronics
IRF
75 VCA
CH2I
GC2I
25K
-
+
GC1I
25K
GC1I
30K
-
+
30K
CAGC
EQUALIZE 78
76 ARF
-
+
-
+
+
-
+
-
19
MUTEI (From Micom)
VC
Special Circuit Descriptions
12
CH2O
10
GC2O
15 GC1O
13
CH1O
5-5