Sony MB-806A Service Manual page 23

2-3. Error Messages
The following error messages will appear if an error is detected by the built-in self diagnostics function of the MB-806A
with WRU-806A.
Error Massage Comments Countermeasure
Err 01 Error the backup memory Because data is initialized, perform the group setting, channel setting again.
Check the WRU-806A then fix a faulty section, and perform "3. Electrical
Alignment' if there is an error message even when the setting had been
completed again.
Err 02 PLL synthesizer circuit failed Malfunction of WRU-806A.
Check the WRU-806A then fix a faulty section, and perform "3. Electrical
Alignment'.
NO TONE The tone signal is present, or audio Make sure that the transmitter is turned on. If it is, then the problem lies in
signal output is muted because the the transmitter's tone signal generator or the tuner's tone squelch circuit.
receiver received a tone signal other _If you are using a WRT-810A wireless microphone, a "NO TONE" message
than 32.768 kHz signal. appears when you turn off the AF switch, but this is normal.
* To check the characteristics, perform "3-2-2. Overall Characteristic
Confirmation".
\f there are out of characteristics, tuner unit may defect.
+ Check the WRU-806A then fix a faulty section, and perform "3. Electrical
Alignment'.
2-4. Setting / Release of Muting Function
Set or release the following functions by operating the button on the front panel of the MB-806A (with WRU-806A).
Note: The muting function can be set and released separately for tuner [1] to [6]. (Tuner [1] to [6] ; when WRU-
806A are installed.)
Function Setting / Release
* Muting OFF by RF signal input level Muting OFF mode setting:
* Muting OFF by tone squelch When pressing the "GP" and "CH" buttons, turn ON the POWER switch.
* Muting OFF by noise squelch Muting OFF mode releasing (Normal operation mode):
Tum OFF the POWER switch.
Default Factory Setting : Muting OFF mode is released (Normal mode).
2-2 MB-BO6A (CE)
WRU-806A (CE, AU)