Test Mode - Sony ZS-PS30CP Service Manual

EEPROM CLR
It can clear the EEPROM.
Procedure:
1. While pressing two buttons of [DISPLAY] and [
neously and connect the AC power cord.
2. The EEPROM is cleared, and the message "CLR" is displayed
on the liquid crystal display, then becomes the standby state.
PANEL AND KEY TEST
It can check the liquid crystal display and button.
Procedure:
1. While pressing two buttons of [x] and [DISPLAY] simultane-
ously and connect the AC power cord.
2. It enters the panel and key test mode, and all segments on the
liquid crystal display light up.
3. Each time a button is pressed, the segments on the liquid crys-
tal display corresponding to each button disappear.
4. When all buttons are pressed, all segments on the liquid crystal
display disappear.
5. When the [DISPLAY] button is pressed, becomes the standby
state.
Releasing method:
Disconnect the AC power cord.
CD TEST MODE
It can check the focus error and tracking error.
Procedure:
1. Connect the oscilloscope to TP895 (FEI) and TP814 (GND) on
the MAIN board.
MAIN board
TP895 (FEI)
TP814 (GND)
2. Open the CD lid.
3. While pressing [x] button for around 8 seconds and connect
the AC power cord.
4. It enters the CD test mode, and the message "TEST 1" is dis-
played on the liquid crystal display.
5. When the message "TEST 1" is displayed on the liquid crystal
display, press the [ ] button.
u
6. It enters the focus error test mode, and the message "FE" is
displayed on the liquid crystal display.
7. When the CD disc is placed and CD lid is closed, focus error
starts.
8. Confi rm that oscilloscope waveform is as shown in the fi gure
below.
9. Disconnect the AC power cord to release the focus error test
mode.
SECTION 3

TEST MODE

] simulta-
>
oscilloscope
+
–
VOLT/DIV: 200 mV
TIME/DIV: 2 ms
1.2 ± 0.6 Vp-p
10. Connect the oscilloscope to TP805 (TEI) and TP814 (GND) on
the MAIN board.
MAIN board
TP805 (TEI)
TP814 (GND)
11. Open the CD lid.
12. While pressing [x] button for around 8 seconds and connect
the AC power cord.
13. It enters the CD test mode, and the message "TEST 1" is dis-
played on the liquid crystal display.
14. When the [ ] button is pressed, the message on the liquid
>
crystal display change to "TEST 2".
(When the [ ] button is pressed again, the message on the
>
liquid crystal display change to "TEST 1")
15. It enters the tracking error test mode, and the message "TE" is
displayed on the liquid crystal display.
16. When the CD lid is closed, tracking error starts.
17. Confi rm that oscilloscope waveform is as shown in the fi gure
below.
Releasing method:
Press the [POWER] button or disconnect the AC power cord.
Connection Location:
– MAIN Board (Conductor Side) –
TP814
(GND)
ZS-PS30CP
oscilloscope
+
–
VOLT/DIV: 500 mV
TIME/DIV: 2 ms
1.2 ± 0.6 Vp-p
TP805
(TEI)
TP895
(FEI)
17