Sony Walkman MZ-E909, Service Manual

Page: 11 / 40

11
MZ-E909
4-8. KEY CHECK MODE
4-8-1. Outline of the function
This mode is used to check to make sure that each of the keys
(including the slide switch) on the set operates normally.
4-8-2. Setting the Key Check mode
1. Set the TEST MODE. Press and hold down DISPLAY key (for
more than 3 sec) to set the Key Check mode.
LCD display
2. When each key on the set and on remote control is pressed, its
name is displayed on the LCD. (The operated position is dis-
played for 4 sec after the slide switch is operated. If any other
key is pressed during this display, the LCD switches to its name
display)
Example: When > N key on the set is pressed:
LCD display
Example: When > N key on the remote control is pressed:
LCD display
XX: AD value of the remote control key (hexadecimal 00 to FF)
3. When all the keys on the set and on the remote control are con-
sidered as OK, the following displays are shown for 2 sec.
(The key pressed to enter the Key Check mode has been checked
even if it is not pressed in this mode)
Example: When the keys on the set are considered as OK:
LCD display
Example: When the keys on the remote control are considered
as OK:
LCD display
4. When all the key have been checked or when the top panel is
opened during this checking, the system terminates the Key
Check mode and return to the TEST MODE.
000
0F
4-7. SOUND SKIP CHECK RESULT DISPLAY MODE
This set can display and check the error count occurring during
play.
•
Setting method of Sound Skip Check Result Display Mode
1. Setting the test mode.
2. Press the
> N
key activates the sound skip check result
display mode where the LCD displays as shown below.
LCD display
3. When > N key is pressed, the total of error count is dis-
played on the LCD, and each time the > N key is pressed,
the error count descents one by one as shown below. Also, when
.
key is pressed, the error count ascends by one.
P**R00 : Total of play system error and record system error count
** : Sound skip check items counter (hexadecimal)
##### : 6-digit address (hexadecimal) where a sound skipped
Error code
Cause of error Description of error
Playback EIB Sound error correction error
Stat Decorder status error
Adrs Cannot access the address
BEmp Buffer becomes empty
4. Quit the sound skip check result display mode, and press the x
key to return to the test mode. (display check mode)
000
P * * P # #
Total of record system error count
Total of play system
error count
000
P * * R 0 0
000
E I B * *
000
S t a t * *
000
A d r s * *
000
B E m p * *
000
# # # # # #
000
FF 0F
000
rPLAY XX
888
SET OK OF
888
RMC OK OX