Table of Contents
Advertisement
SERVICE
MODE
Specifications
To enter any service mode other than timer debugging, first simultaneously press the OPEN/CLOSE and BAND keys on the CT unit.
This accesses the service mode entry state.
Now press one of the buttons on the CT unit to enter a service mode.
As the service
mode entry state is discontinued after 1 second elapses, the system will enter a service mode only if the next key is pressed within
one second.
1. Confirm the clock
- When the CLOCK key is pressed during the service mode entry state, a rectangular wave with a frequency of one- fourth that
of the oscillating frequency (1.048576MHz) is output from the micro processor's port CLKOUT.
- The clock output is stopped by pressing either the POWER or SET CLEAR key.
2. Timer debugging
- When the FAST key is pressed, the current time advances one minute and the seconds readout changes to 55 seconds.
If the
key is held down the time advances continuously.
- The FAST key, a concealed key not actually mounted to the set.
Note: For timer debugging, the service mode entry state (entered by simultaneously pressing the
12k ohm
OPEN/CLOSE service mode entry key and the BAND key) is not necessary.
L
3. Checking the key input signal connections
|
- Enter this mode by pressing the MEMORY(TUNER)
key during the service mode entry state.
=—
- The entire LCD goes out once this mode is entered.
- In this mode, as keys on the CT unit (or remote control unit) are pressed segments on the LCD corresponding to each key on
a one-to-one basis come on (i.e. the lit portions gradually increase).
(Refer to Table 1.)
FUNCTION
PST UP
pst DOWN
FM/TUNE MODE
WIDE
AWo
area
TIME / FADE
REPEAT
STOP
fone
CD MEMORY
PROG.
KEY
DISPLAY
CLOCK
SLEEP
TUNING UP
TUNING DOWN
WAKE UP
TIMER
SET / CLEAR
@ |
@ : Releases the key checking mode and returns the set to the normal mode.
PLAY / PAUSE
RANDOM
TABLE 1 : CORRESPONDING
KEYS AND DISPLAYS IN THE KEY CHECKING MODE
oes
REC,
| WIDE CLOCK INTRO RANDOM
OFF SIDEA
SLEEP
OY
ap
ppp
EM 12 Spy
:«CON SIDE B
wake uP FMB ICICT fay? SUVA ON Sh
beVEL (12k $3047 (way
U6) 2beI80 130 htt PM
TIMER REC DISC ST TRACK AUTO MONO FADE TIME EDIT
FIGURE 1 : LCD( LIQUID CRYSTAL DISPLAY )
~9-
Advertisement
Table of Contents
