Sony MD Walkman MZ-E25, Service Manual

Page: 9 / 30

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SECTION 3
TEST MODE
General
• In the TEST mode, this set provides the Auto mode in which
both CD and MO are adjusted automatically. In the Auto mode,
whether a disc is CD or MO is discriminated, then each
adjsutment is automatically executed sequentially. If a fault is
found, it is displayed. Also, in the Servo mode, each item can be
adjusted automatically.
Entering TEST Mode
To enter the TEST mode, the following two methods are avail-
able:
Method-1. Entry by key input
Turn on the HOLD switch on the main set, and while pressing
p
key on the main set, press the following keys on the remote
controller in this order.
+
→
+
→
=
→
=
→
+
→
=
→
+
→
=
→
P
→
P
Method-2. Entry by shorting the test point
Bridge the TAP801 (TEST) with a solder (connect IC801
#™
to
GND) on the MAIN board, turn on the POWER switch, and press
(
key.
Releasing TEST Mode
1. Turn off the POWER switch.
2. Remove the solder bridge form TAP801 (TEST) on the MAIN
board. (This is required only when using Method-2.)
Operation in TEST Mode
In the TEST mode, the Remote controller LCD display is as shown
below:
• ROM version display
→
All ON
→
All OFF are repeated.
• To hold the display for confirmation, press the PLAY MODE
key.
Configuration of TEST Mode
The TEST mode configuration of this set is as follows:
SERVO Mode
• Enter the TEST mode, press VOL
−
key and
(
key to select
the SERVO mode.
• When the second digit of mode number is not 0 and the first
digit is 0 (010, 020, 030, etc.), the optical pickup moves to out-
side track or inside track with
+
key or
=
key respec-
tively.
• To select other modes, refer to the TEST mode configuration.
1. Configuration of SERVO Mode
300 V3.000
Remote controller LCD
ROM version
display
Display in TEST Mode
+key
–key
+,
–
key
+,
–
key
+,
–
key
p
key
p key
p
key
( key
(
key
p
key
AUTO Mode
Auto?
SERVO Mode
0 0 0
AUDIO Mode
1 0 0
POWER Mode
3 0 0
MANUAL
Mode
Manu?
Start?
+,–key
+,–key
p
key
p
key
p
key
p
key
p
key
p
key
1 2 3
(To page 10 )
SERVO Mode
0 0 0
OFFSET Adj.
0 1 0
Each time
(
key is press-
ed,
011-013
modes
are switched. (For each
mode, see relevant table)
Each time
(
key is press-
ed,
021-024
modes
are switched. (For each
mode, see relevant table)
Each time
(
key is press-
ed,
031-039
modes
are switched. (For each
mode, see relevant table)
LASER
POWER Adj.
0 2 0
MO Adj.
0 3 0
(
key
(
key
(
key
(
key
(
key
(
key
( key