Sharp SD-CX1H(BL) Service Manual page 23

7. KEY test
Outline: To check if KEY data are input to the microcomputer accurately
Operation
All lights of segments on FL go off while the keys are not effective.
Segments corresponding to the keys are lit up as shown below.
The power button is an exception; 2 seconds after all lights are lit, the TEST mode is cancelled.
KEY
POWER
VOLUME UP
VOLUME DOWM
TUNER/BAND
AUX (DEMO)
ERASE
MD EJECT
MD PLAY
MD STOP
MD REC
REC MODE
PLAY-MODE
+10
CD-OP/CL
CD EJECT
CD PLAY
CD STOP
CD SKIP-UP (TUNING
CD SKIP-DOWN (TUNING
8. TUNER TEST
Outline: To test the accurate operation of the tuner
The following presets are written.
a. Reception of Preset 1.
b. Press the POWER button to cancel the TEST mode. In this case, preset is entirely erased.
P1 P2
87.50 108.00
Flashing is done if FM 87.50 MHz can't be received.
PNO Display
The flashing display of FM/AM
TEST mode cancelled 2 seconds after all lights are lit
kHz
MHz
[FM]
[AUX]
TOC
AM
PM
[MD]
REC MARK
LP2
REPEAT MARK
LP4
RANDOM
FLAG MARK
PLAY MARK
[CD]
/ ) [ST]
/ ) STEREO
Tuner TEST mode Preset memory
P3 P4 P5
90.00 106.00 98.00
FM AM
Figure 23 TEST MODE MENU
Segment
P6 P7 P8
522k 1620k 603k
– 23 –
P9 P10 P11
1404k 990k
TUN TEST
SD-CX1H