Test Mode; Outline - Sony MZ-R70 Service Manual

4-1. OUTLINE

• This set provides the Overall adjustment mode (Assy mode) that
allows CD and MO disc to be automatically adjusted when in
the test mode. In this overall adjustment mode, the protect switch
is detected to judge the disc, CD or 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 indi-
vidual adjustment to be automatically adjusted.
• The keys in the description refer to the keys on both set and
remote commander unless otherwise specified. Though LCD
display shows the LCD of the remote commander, same con-
tents are also displayed on the LCD of the set.

4-2. TEST MODE

4-2-1. Setting Method of Test Mode
There are two different methods to set the test mode:
1 Short BP801 (TEST) on the MAIN board with a solder bridge
(connect pin y; of IC801 to the ground). Then, turn on the
power.
MAIN BOARD (SIDE B)
–
IC502
88 89
25 85 86
26
82 83
28 78 80
76 77
32
36 73
74
147 144 146
37 46 47 50 53 56 59 64 68 72 145
42 45 48 51 55 57 60 63 66 67 70
38 40
39 41 43 44 49 52 54 58 61 62 65 69 71
FB502 FB503
L502
FB504
C529
09
AP507
AP1001
AP506
12
88 87 86 83 81 78 74 72 69 64 63 60 58
10
90 89 85 84 80 77 75 71 68 65 62 59 57
805
93 92 91 82 79 76 73 70 67 66 61 55 56
96 95 94 52 53 54
99 98 97 49 50 51
IC801
46 47 48
102 101 100
43 45 44
105 104 103
40 41 42
108 104 106
109 110 111 37 36 39
113 114 112 34 35 36
4 7 10 13 16 19 22 27 32 33
117 116 115
119 118 2 6 8 11 14 17 21 23 26 28 31
32 120 1 3 5 9 12 15 18 20 24 25 29 30
BP801
TEST MODE
–
AP521
90
87
84
OFF ON
81
AP508
79
75
AP504
AP505
R530
S804
R529
HOLD
BP801
AP511
AP516
AP519
AP830
AP834
AP517
X801
AP907
AP807
AP911
C801
AP806
5 4
IC802
8
1
AP5209
SECTION 4
2 In the normal mode, turn on the HOLD switch on the set. While
pressing the
control keys in the following order:
t
> >
t
> .
4-2-2. Operation in Setting the Test Mode
• When the test mode becomes active, first the display check mode
is selected. (Press
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.
LCD display
All lit
All off
Microprocessor
version
display
When the X key is pressed and hold down, the display at that
time is held so that display can be checked.
4-2-3. Releasing the Test Mode
For test mode set with the method 1:
Turn off the power and open the solder bridge on BP801 (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 20) has not been finished com-
pletely, always start in the test mode. (The set cannot start in nor-
mal mode.)
– 13 –
key on the set, press the following remote
x
t t t
. . >
t t
X X
key once, when the display check mode
x
xxxxxxxxx
t t
.
F