Test Mode; Outline; Setting Method Of Test Mode; Operation In Setting The Test Mode - Sony MZ-R501 Service Manual

4-1. 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.

4-2. 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 3 of IC801 to the ground). Then, turn on the
power.
MAIN BOARD (SIDE B)
C815
AP526
AP528
C521
AP529
AP531
AP530
R811
2 In the normal mode, turn on the
[VOL --]
ing the key press the following order:
t t t
> > .
t t t
. > .
SECTION 4

TEST MODE

AP856
R805
TAP801
(TEST)
AP803
FB801
C808
C807 R810
R830
AP802
[HOLD]
switch. While press-
t t
. >
t
X X

4-3. Operation in Setting the Test Mode

• When the test mode becomes active, first the display check mode
is selected.
• Other mode can be selected from the display check mode.
• When the test mode is set, the LCD repeats the following dis-
play.
This set LCD display
MONO
All lit
u
-a88: 88
All off
Microcomputer
version
display
00 6
• When the
key is pressed and hold down, the display at that
X
time is held so that display can be checked.

4-4. 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
completely, always start in the test mode. (The set cannot
start in normal mode)
MZ-R501/R501PC
SYNC REC REMAIN
REC SHUF F 1
V1.300
11