Key Functions
1. Keys M1 to M6
Radio mode
In radio mode these keys are used for writing and reading preset memory.
Pressing and then releasing one of the keys M1 to M6 within 1.5 seconds reads out the corresponding memory.
Holding the key down for over 1.5 seconds writes the currently displayed frequency to memory.
Tape mode
In tape mode, the M4, M5 and M6 keys are used for tape control.
Diode matrix switching enables double function key type selection.
M4/Metal key
The port and the display are inverted each time this key is pressed.
M5/Dolby key
The port and the display are inverted each time this key is pressed.
M6/APSS key
The port and the display are inverted each time this key is pressed.
VF mode
In VF mode, the M1 to M6 keys have their radio mode functions during tape and CD operation.
2. MAN UP/T UP, MAN DN/T DN
When the AUTO500 diode matrix setting is 0
The frequency is incremented or decremented by one step each time the manual tuning key is pressed. The
frequency is advanced at about 70 ms per step when the key is held down for over 500 ms. The system pauses for
about 500 ms when crossing from band edge to band edge.
When the AUTO500 diode matrix setting is 1
The system switches to manual tuning mode if the key is pressed and held down for less than 500 ms, and to seek
mode if pressed and held down for longer than 500 ms.
In VF mode, these keys function as the seek up key and the seek down key.
3. Seek up and seek down
These operations automatically search for a station and hold that station when found. During a seek, the system will
switch to scan mode if a scan key is pressed. Therefore, if the scan up key is pressed during a seek down operation, a
scan in the up direction is started. Similarly, if the seek down (or up) key is pressed during a seek up (or down)
operation, a seek down (or up) operation starts. Search mode is cleared if the same key is pressed twice in a row. The
search pauses for 500 ms when switching from one band edge to another. The search speed is 50 ms per step in FM
mode, and 70 ms per step in AM mode.
No. 4934-12/27
LC72323-XXXX
Key
Display state
Output state
METAL
On
H
Off
L
Key
Display state
Output state
DOLBY
On
H
Off
L
Key
Display state
Output state
APSS
On
H
Off
L