Daewoo AKF-8825 series, Service Manual

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33
FUNCTION OF MICOM IC
PIN
39
40
44
42
41
22
43
65
64
38
47
62
63
60
59
66
PIN NAME
PO1
PO0
PN0/BEEP
TUNER MUTE PORT.
WHEN TUNING, OUTPUT IS HIGH THEN MUTE IS ON.
(SEEK, WHEN SD CHECK)
AUDIO MUTE PORT, ACTIVE HIGH
OUTPUT PORT OF BEEP.
BEEP COMES OUT AT 2.08, OR 3.75kHz DEPENDING ON
OPERATION REQUESTED
BAND SELECT PORT IN TUNER MODE.
RESET FM MW LW
BAND_1 0 1 0 0
BAND_2 0 0 1 0
STEREO INPUT TERMINAL
STARTING IS HIGH, WHEN INPUT IS LOW ON AIR STEREO IS
DISPLAYED
SIGNAL DETECTION PORT.
STARTING INPUT IS HIGH, INPUT IS CHANGED INTO LOW
WHEN RECEIVING THE RADIO FREQUENCY.
MUTING (WHEN CHECKING AF IN RADIO MODE)
LOW (IN ACTIVE, HIGH AND OTHERS MODES)
INPUT TERMINAL OF USING-TELEPHONE SIGNAL STARTING IS HIGH.
MUTING IF ACTIVE BECOMES
LOCAL MODE HIGH
DX MODE ---> LOW
STARTING IS ---> LOW
USED RADIO MODE ONLY. STARTING OUTPUT IS LOW.
MONO MODE ---> LOW
STEREO MODE ---> HIGH
SIGNAL METER INPUT TERMINAL
RANGE-AT SEEK LOCAL : CHECK SD ACTIVE
DX : CHECK SD ACTIVE
AT AF : AF CHECK STOP VOLTAGE 1.5V
TAPE MODE : HIGH
RADIO MODE : HIGH
PN2
PN3
PC0
PN1
PH1/
ADI1
PH2/
ADI2
PO2
PM1
PI0
PH3
PJ0
PJ1
PH0/
ADI0
DESCRIPTION
I/O
O
O
O
O
O
O
O
I
I
I
I
O
O
O
I