Sony UWP-V1, Service Manual

Page: 17 / 164

1-13
UWP Series
1-4-3. Precaution When Replacing EEPROM (IC11)
When the EEPROM (IC11) is replaced with the new EEPROM, the same data that have been stored in the
removed EEPROM must be written into the newly mounted EEPROM.
1-4-4. Error Messages
When an error occurs, any of the following error messages can be generated by the self-diagnostics
function that is built-in the URX-P2 and can appear on the display section.
Message
Err01
Err02
Err03
NOTONE
Sq OFF
INIT
Error contents
An error occurs in EEPROM data.
The PLL synthesizer circuit does not
lock.
Power supply voltage has exceeded
the range of allowable limits.
The tone signal does not exist, or
any tone signal radio wave other
than 32 kHz is received and the
audio signal is muted.
If you turn on the power while
pressing the “-“ button, the squelch
function release mode is set.
The message is displayed when the
power is turned on while the “SET”
button and the “
_ “ button are
pressed at the same time.
If the “SET” button and the “
_ “
button are pressed at the same time,
the UTX-P2 enters the default
setting mode.
Remedial measure
With “Error1” displayed, press and hold the “-“ button for 20 seconds to
read the backup data.The data is successfully read when “RELOAD” is
displayed. If the data fails to be read, check the peripheral circuits of
IC671, and perform the following measures.
. Write the frequency data that corresponds to the desired destination
location, into EEPROM.
. Perform the RF squelch adjustment and the RF level indicator
adjustment. (Refer to Section 2-4.)
If the frequency data that does not corresponds to the desired reception
frequency range is written:
Write the correct frequency data into the EEPROM.
If the error message is displayed even though the frequency data is
correct:
Check the PLL synthesizer circuit (IC321, X301, Q341 and Q342 and its
peripheral circuits on the RF-130 board).
Use the equipment with the power supply of the specified voltage range.
An interference radio wave has occurred in the frequency band in use.
. If an error is displayed while the power of the transmitter is on:
Turn off the power of the transmitter.
. If the RF level indicator of the receiver LCD lights even when the power
of the transmitter is turned off:
Set the frequency of the transmit/receive channel that is free from
the interference radio wave.
When the error is not caused by the signal interference, the tone squelch
circuit of receiver or transmitter (both receiver and transmitter) is defective.
. Check the receiver : Check the tone squelch. (Refer to Section 2-4.)
If the tone squelch does not work well, check
the tone squelch circuit (IC441 and its
peripheral circuit on the CPU-421 board.)
. Check the transmitter : Refer to the Service Manual of transmitter.
Turn off the power once and then back on without pressing any button.
Do not press the “SET” button and the “ _ “ button.