Test Mode - Sony CDP-CX50 Service Manual

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DISPLAY CHECK MODE
NOTE:
This will not work properly if the DISC is set to any slit.
1. Press the POWER button, turn ON the power, and set a CD in
any slit.
2. Press the POWER button, and turn OFF the power.
3. While pressing the CHECK and PLUS ONE buttons together
with the power OFF, press the POWER button and turn ON the
power.
4. All the segments of the fluorescent indicator tube light up, and
the · , P , and PLUS ONE LEDs light up.
5. To exit the display check mode, press the POWER button or p
button.
ADJ MODE
1. Press the POWER button to turn the power ON.
2. Open the front cover, and press the PLUS ONE button.
3. Set the disc (YEDS-18 : 3-702-101-01) in the PLUS ONE slit.
4. Close the front cover, and chuck the disc.
5. Press the POWER button, and turn OFF the power.
6. Connect TP (TP301:ADJ) of the DISPLAY board and the ground
with a lead wire.
7. Press the POWER button and turn ON the power.
The ADJ mode is set with the above.
Differences with normal mode
• No high speed search is performed during access
• Ignored even if GFS becomes L
TE
L 13942296513
• Ignored even if Q data cannot be read
• Spindle servo gain is set to 12 cm mode (Even with 8 cm disc)
The following special functions will work when certain functions
are pressed in this mode.
Special functions in ADJ mode
(The ( ) buttons function only with the general purpose remote.)
Button
(3) Tracking servo , sled servo OFF
(8) Tracking servo, sled servo ON
CHECK S shape observation mode
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SECTION 4

TEST MODE

Function
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FLUORESCENT INDICATOR TUBE, LED ALL LIT,
AND KEY CHECK MODE
Connect TP (TP302:AFADJ) of the DISPLAY board and the ground
with the power OFF and press the POWER button.
The fluorescent indicator tube and LEDs all light up.
When a button is pressed, the left side of the indicator tube will
show how many buttons have been pressed so far.
(However, buttons already pressed once will not be counted.)
The right side will show the numbers corresponding to the pressed
buttons.
[ DISPLAY BOARD ] — CONDUCTOR SIDE —
CNP801
IC801
CNP804
TP301
(ADJ)
Q Q
3 6 7 1 3 1 5
Buttons and Corresponding Button Numbers
Button Button Number or Display
CONTINUE 1
SHUFFLE 2
PROGRAM 3
REPEAT 4
CHECK 5
CLEAR 6
PLUS ONE 7
8 (The fluorescent indicator tube and LED near by
·
(D801) are lit while pressed.)
9 (The fluorescent indicator tube (segment check) is
P
partially lit and LED near by (D802) is lit while
pressed.)
10 (The fluorescent indicator tube is partially lit while
p
pressed (grid check).)
≠ 0
11
) ±
12
05
co
Count up
.
9 4 2 8
TP302
(AFADJ)
0 5 8 2 9 9 4 2 8
12
m
Button number
9 9
9 9