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TEST Mode (Operation Check)
Preform the following operation checks using the TEST Mode before
starting the repair works.
1. All Keys Operation Check
Connection Method :
Regulated power supply
(+6V constant voltage output)
set
1) While pressing the CHANNEL + key and the VOLUME +
key, ture ON the main power of the regulated power supply
(DC +6V). (Refer to Fig. 1-1.)
2) After sounding buzzer, remove all hands from pressing the all
keys descrived in above step 1). The all indications of the LCD
must be turned OFF. (Refer to Fig. 1-2.)
3) When any key of the Operation panel-key block (except
the COMMANDER OFF key), or any key of the LCD touch-
key block is pressed, the signal (carrier 40kHz) as shown in
Fig. 1-3 must be transmitted in accordance the pressed key, when
operation of the machine is normal.
4) Press all keys of the Operation panel-key block (except the
COMMANDER OFF key, and of the LCD touch-key block
sequentially. When all keys are pressed, confirm that the long
buzzar sound and aii LCD displays are turned off.
NOTE : Be careful that all data in S-RAM is cleared
when the above TEST mode is performed.
•
This TEST Mode can be terminoted in its middle before testing
all keys by pressing the COMMANDER OFF key. However
the conduction check of the remairing keys cannot be checked.
(S-RAM isnot cleared.)
•
P-ROM (IC9) is diagnosed to be free from defects when the
steps from 1) to 4) are performed correctly.
SECTION 3
TEST MODE
+
–
LCD touch-key block
COMMANDER OFF
Operation
panel-key block
CHANNEL
VOLUME
+
+
While pressing both keys
at the same time;
Fig. 1-1
Fig. 1-2
2.4msec
2.4msec
600 µ sec
Fig. 1-3
RM-AV2100B
CHANNEL +
VOLUME +
Turn ON the
main power (DC 6V)
2.4msec
600 µ sec
5
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