Test Mode - Sony MZ-E800 Service Manual

Outline
• This set provides the Overall adjustment mode that allows CD
and MO discs to be automatically adjusted when in the test mode.
In this overall adjustment mode, the disc is discriminate between
CD and MO, and each adjustment is automatically executed in
order. If a fault is found, the system displays its location. Also,
the manual mode allows each individual adjustment to be auto-
matically adjusted.
• Operation in the test mode is performed with the remote com-
mander. A key having no particular description in the text, indi-
cates a remote commander key.
Setting Method of Test Mode
There are two different methods to set the test mode:
1 Short TAP801 (TEST) on the MAIN board with a solder bridge
(connect pin y; of IC801 to the ground). Then, turn on the
power.
– MAIN Board (Component Side) –
C522
02
R620
8 7 5 148 149
0 6 4 150 151
1 1 152 2 3
140 141 142
136 138 139
134 135 137
2 In the normal mode, turn on the HOLD switch on the set.
While pressing the key on the set, press the following
x
remote commander keys in the following order:
t t
N > N >
t t
. N > .
SECTION 4

TEST MODE

TAP801 (TEST)
R205
1 8
IC802
R1
4 5
X801
58 57 56 54 51 48 44 42 39 36 33
60 59 55 53 50 47 45 41 38 35 32
t t
. . N >
t t
X X
Operation in Setting the Test Mode
• When the test mode becomes active, first the display check mode
is selected. (Press the
is not active)
• Other mode can be selected from the display check mode.
• When the test mode is set, the LCD repeats the following dis-
play.
Set LCD display
888
All lit
Remote commander LCD display
All lit
All off
Microcomputer
version
display
• When the
X
time is held so that display can be checked.
Caution: On the set having the microcomputer version 1.000, the
NV reset failure will occur.
Therefore, in executing the NV reset during electrical
adjustment, follow the troubleshooting method of NV
reset to perform the NV reset (see page 17).
Releasing the Test Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on TAP801 (TEST)
on the MAIN board.
Note: Remove the solders completely. Remaining could be shorted with
the chassis, etc.
For test mode set with the method 2:
Turn off the power.
Note: If electrical adjustment (see page 17) has not been finished com-
pletely, always start in the test mode. (The set cannot start in nor-
mal mode)
t
– 12 –
key once, when the display check mode
x
All off
888
006 V1.000
key is pressed and hold down, the display at that
100
Microcomputer
version display
F1SHUF
u
REC