Read Sharp SD-CX1 (serv.man5) Service Manual online
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SD-CX1H
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.
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
Segment
POWER
TEST mode cancelled 2 seconds after all lights are lit
VOLUME UP
kHz
VOLUME DOWM
MHz
TUNER/BAND
[FM]
AUX (DEMO)
[AUX]
ERASE
TOC
MD EJECT
AM
MD PLAY
PM
MD STOP
[MD]
MD REC
REC MARK
REC MODE
LP2
PLAY-MODE
REPEAT MARK
+10
LP4
CD-OP/CL
RANDOM
CD EJECT
FLAG MARK
CD PLAY
PLAY MARK
CD STOP
[CD]
CD SKIP-UP (TUNING
/
)
[ST]
CD SKIP-DOWN (TUNING
/
)
STEREO
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.
a. Reception of Preset 1.
b. Press the POWER button to cancel the TEST mode. In this case, preset is entirely erased.
Figure 23 TEST MODE MENU
Tuner TEST mode Preset memory
P1
87.50
P2
108.00
P3
90.00
P4
106.00
P5
98.00
P6
522k
P7
1620k
P8
603k
P9
1404k
P10
990k
P11
Flashing is done if FM 87.50 MHz can't be received.
PNO Display
The flashing display of FM/AM
AM
FM
TUN TEST
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