Kenwood KR-A5040 Service Manual page 6

KR-A5040
CIRCUIT DESCRIPTION
1-1. Initial Setting
1) Function initial setting
Last channel memory ...................60060. FM : 87.5MHz
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WOU SOLS CTO sertasrceanmdccnuscadenchiinedcelusstaecsane ances: Tuner
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Frequency memorized for each PRESET channel when
the memory is cleared (Test frequency)
SAND] __ FM
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87.
8
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220 ame
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5
6 a A
| 7 [1001 {1001 =f ow | ow | 530
[81020
530
530
" 1700 kHz is set for WIDE only.
2) Microprocessor output port initial setting
Any figure in( —_) is. a pin number.
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The initial setting is performed in a following event :
1. When backup memory data is destroyed when reset
tS applied to the microprocessor.
2. When the power cord is plugged in to the AC
wall outlet while pressing the TUNER key.
1-2. Test Mode Setting
1) Method of entering the test mode
1. While pressing the CD key, plug the power cord
to the AC wall outlet. When the test mode is en-
tered, the FL tube display all lights.
2) Method of canceling the test mode
1. Unplug the power cord from the AC wall outlet once.
2. Send the reset signal to the RESET pin or some other
means to reset the microprocessor.
3) Contents of test mode
1. When the test mode is entered, the FL tube display
all lights. This all lighting continues unless a effective
remote control serial code or the test mode is can-
celed.
2. The test frequency is stored in memory for each
preset channel. (For each frequency to be stored
in memory, refer to its associated listing.)
3. The test mode is different from the normal mode
in the following operations:
— When the tuner UP or DOWN key is pressed
when a mode other than TUNER has been select-
ed, the potentiometer is increased or decreased.
Once one of these keys has been pressed, the op-
eration continues even if the key ts released. It
stops automatically if the AUTO or POWER key is
pressed or if the AUTO or POWER key Is not
pressed for 16 seconds.