3. OPERATION CHECKING ON HARDWARE
JCY-1900
1950
DR Service Manual
55
DOC No. 7ZPNA4409
3.3.2. Audio Recording Board : CHA-1900
Audio Recording Board(CHA-1900) on the RCU has the LEDs that display the following state.
1) Power
The lighting specifications of the LEDs
LED Name Lighting Specifications
“POWER”（Green）
Lights when the ARB is supplied with power.
“5.0V”（Green）
Lights when the ARB is supplied with 5.0V
“3.3V”（Green）
Lights when the ARB is supplied with 3.3V
2) Audio record
The lighting specifications of the LEDs
LED Name Lighting Specifications
CD203（Green）
Lights when the communication error to MCB occurs.
CD202（Green）
Lights when the timeout of the task occurs.
CD201（Green）
Lights when some ARB error occurs.
CD206（Green）
Lights when the microphone test is operating.
CD205（Green） Blinks every 1 minutes.（means the cycle of a recording file creation.）
CD204（Green） Blinks every 128 msec.（means the buffer cycle.）
3) Serial received signal
The ARB has LEDs that display existence or non-existence of the reception data sent from the device which is con-
nected via the serial line. All channels (CH1-24) have respective RX-LEDs.
The lighting specifications of the LEDs
RX LED Display
(GREEN)
Reception Data
Blinks. Exists.
Lights up. Exists. (The cable may be connected reversely.)
Goes out. Not exists.
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