Sony Walkman MZ-RH1 Service Manual page 14

MZ-RH1
4. OVERALL ADJUSTMENT MODE
Operation of The Overall Adjustment Mode
1. Enter the test mode (Display Check mode).
2. Press the [VOL--] key to activate the Overall Adjustment mode
where the EL displays as shown below.
0000
"**":
If "DF" or "FF" is displayed, it mean that completed the servo
overall adjustment.
3. To release the Overall Adjustment mode, press the
return to the Display Check mode.
14
AdjF**
key and
x
5. SELF-DIAGNOSIS RESULT DISPLAY MODE
This set uses the self-diagnostic function system in which if an error
occurred during the recording or playing, the mechanism control
block and the power supply control block in the microcomputer
detect it and record its cause as history in the nonvolatile memory.
By checking this history in the test mode, you can analyze a fault
and determine its location.
Total recording time is recorded as a guideline of how long the
optical pick-up has been used, and by comparing it with the total
recording time at the time when an error occurred in the self-
diagnosis result display mode, you can determine when the error
occurred.
Clear the total recording time, if the optical pick-up was replaced.
5-1. Operation of The Self-Diagnosis Result Display
Mode
1. Enter the test mode (Display Check mode).
2. Press the key to activate the Self-Diagnosis Result Display
>
mode where the LCD displays as shown below.
****
"****" : Error display code
"$$" : Error revision history code
"####" : Addition information when error occurs
3. To release the Self-Diagnosis Result Display mode, press the
and return to the Display Check mode.
Flow of Self-diagnosis Result Display mode operation:
1 ####
****
[VOL +] key [VOL --] key
N ####
****
[VOL +] key [VOL --] key
N1####
****
[VOL +] key [VOL --] key
N2####
****
[VOL +] key [VOL --] key
R_####
****
[VOL +] key [VOL --] key
$$####
key
x
The first error
The last error
One error before
the last
Two error before
the last
Total recording time