Sony ZS-S10CP, Service Manual

Page: 15 / 40

ZS-S10CP
ZS-S10CP
15 15
SECTION 4
ELECTRICAL CHECKS
TUNER SECTION 0 dB = 1

V
[AM]
Setting:
Function: RADIO
Band: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
Put the lead-wire
antenna close to
the unit.
HP JACK board
i
jack (J302)
unit
+
í
level meter
32
:
[FM]
Setting:
Function: RADIO
Band: FM
FM RF signal
generator
75 kHz frequency
deviation by
1 kHz signal
Output level:
as low as possible
HP JACK board
i jack (J302)
unit
0.01
P
F
+
í
level meter
MAIN board
TP814 (GND)
32
:
MAIN board
JW101
Note: Perform FM frequency coverage check after removing FM tele-
scopic antenna (ANT1).
no mark: Australian, Chilean, Peruvian and Asian models
( ): Mexican and Panamanian models
AM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Con fi rmation 531 (530) kHz
Con fi rmation 1,602 (1,710) kHz
FM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Con fi rmation 87.5 MHz
Con fi rmation 108 MHz
CD SECTION
Note:
1. CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3. Use an oscilloscope with more than 10 M

impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than speci fi ed value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
MAIN board
TP804 (RF)
TP711 (VREF)
oscilloscope
Procedure:
1. Connect the oscilloscope to TP804 (RF) and TP711 (VREF)
on the MAIN board.
2. In the standby state, press the [POWER] button to turn the
power on.
3. Press the [CD] button to turn the CD function.
4. Set the disc (YEDS-18) and press the [
u
] button to playback.
5. Con fi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (

) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.5 Vp-p
Connection Location:
– MAIN Board (Conductor Side) –
TP814
(GND)
TP804
(RF)
TP711
(VREF)
JW101
SECTION 3
TEST MODE
EEPROM CLR
It can clear the EEPROM.
Procedure:
1. While pressing two buttons of [DISPLAY] and [
>
] simulta-
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)
oscilloscope
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 [
u
] button.
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. Con fi rm that oscilloscope waveform is as shown in the fi gure
below.
1.2 ± 0.6 Vp-p
VOLT/DIV: 200 mV
TIME/DIV: 2 ms
9. Disconnect the AC power cord to release the focus error test
mode.
10. Connect the oscilloscope to TP805 (TEI) and TP814 (GND) on
the MAIN board.
+
–
MAIN board
TP805 (TEI)
TP814 (GND)
oscilloscope
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. Con
fi rm that oscilloscope waveform is as shown in the fi gure
below.
1.2 ± 0.6 Vp-p
VOLT/DIV: 500 mV
TIME/DIV: 2 ms
Releasing method:
Press the [POWER] button or disconnect the AC power cord.
Connection Location:
– MAIN Board (Conductor Side) –
TP814
(GND)
TP895
(FEI)
TP805
(TEI)