Test Mode - Sony MD Walkman MZ-E33 Service Manual

Outline
• In this set, overall adjustment mode is made a
ing test mode to perform automatic adjustment of CD and MO.
In the overall adjustment mode, the disc is determined whether
it is CD or MO and adjustments are performed in sequence. If a
fault is f ound, the location of the fault is displa
mode, each adjustment can be automatically made.
Setting the Test Mode
To enter the test mode , two methods are a
1. Entering method with key input.
Turn off the HOLD s witc h on the set.
p ke y on the set, press the f ollo wing remote commander ke
the following order :
+ n + n = n
= n P n P
2. Entering method by shorting the test point
Solder bridg e the test point
#™ to GND), and turn on the PO
(connect IC801 pin
R808
TP808
TP819
TP911
R811 C807
C806
R810
IC801
Releasing the Test Mode
1. When test mode was entered with ke
2. When test mode was entered b
the PO WER and open the solder bridg
MODE) on the main board.
Operation of Setting on Test Mode
When the test mode is set, the LCD displays the following :
V 1 . 0 0 0
LCD on remote commander
• The c yc le - the abo ve R OM ver sion displa y n All lit n All off
- is repeated.
(The ROM version is constantly displayed.)
• When the PLA Y MODE ke y is pressed and hold do
play at that time is held so that display can be checked.
SECTION 4

TEST MODE

vailab le b y enter -
yed. Also, in ser vo
vailab le :
While holding do wn the
= n + n = n + n
TAP801 (TEST) on the main boar
WER.
Test mode
Short : Test mode
Open : Normal mode
TAP801
y input, turn off the PO WER.
y shor ting the test point, turn off
e of TAP801 (TEST
ROM version display
wn, the dis-
Configuration of Test Mode
The test mode has the configuration given belo
VOL
+ key
Overall
adjustment
p key
mode (Auto?)
VOL
– key
Adjustment
mode
p key
(Manu ?)
ys in
d
Displays of the LCD on the remote commander
are shown in parentheses.
Servo Mode
• Set the test mode
the ser vo mode .
• When the servo mode is set, use the
to move the optical pick-up to the outer circumference and to
the inner cir cumf erence respectivel
• When entering another mode, refer to the configuration of test
mode.
1. Structure of Servo Mode
Servo mode
0 0 0
p key
p key
1
(See page 8)
– 7 –
w.
" key
(Start ?)
p key
p key
" key
Servo mode
0 0 0
Audio mode
1 0 0
Servo mode
3 0 0
, press the VOL – ke y and use the
+
key and the
y.
" key
Offset adjustment
" key
0 1 0
011 to 013
p key
Laser power
" key
adjustment
0 2 0
021 to 024
p key
2 3
*1 Repeatedly press " key
to change the mode.
(Refer to the following list
for a description of each
mode.)
+, – keys
+, – keys
" ke y to set
=
key
*1
" key
*1
" key