Electrical Checks - Sony ZS-PS30CP Service Manual

ZS-PS30CP
Ver. 1.1
0 dB = 1 V
TUNER SECTION
[AM]
Setting:
Function: RADIO
Band: AM
Put the lead-wire
AM RF signal
antenna close to
generator
the unit.
30% amplitude
modulation by
400 Hz signal
Output level:
as low as possible
[FM]
Setting:
Function: RADIO
Band: FM
FM RF signal
generator
MAIN board
JW101
0.01 F
75 kHz frequency
deviation by
1 kHz signal
Output level:
as low as possible
Note: Perform FM frequency coverage check after removing FM tele-
scopic antenna (ANT1).
no mark: Chilean, Peruvian, Asian, Taiwan and Argentina models
AM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Confi rmation
Confi rmation
FM FREQUENCY COVERAGE CHECK
Check that reading on level meter is the maximum
Confi rmation
Confi rmation
18
SECTION 4

ELECTRICAL CHECKS

level meter
32
+
unit
HP JACK board
jack (J302)
i
level meter
32
+
unit
HP JACK board
jack (J302)
i
MAIN board
TP814 (GND)
( ): Panamanian model
531 (530) kHz
1,602 (1,710) kHz
87.5 MHz
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 specifi 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)
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 [
5. Confi 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.
Connection Location:
– MAIN Board (Conductor Side) –
TP814
(GND)
oscilloscope
+
–
] button to playback.
u
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.5 Vp-p
JW101
TP711
(VREF)
TP804
(RF)