Read Sony ZS-BT1 Service Manual online
12
ZS-BT1
SECTION 4
TEST MODE
COLD RESET
Procedure:
1. In the power on status, press three buttons of [ENTER],
x
,
[POWER] simultaneously.
2. The set is reset and display “RESET”, then becomes standby
status.
PANEL TEST MODE
Procedure:
1. In the standby mode or power on status, press three buttons of
[ENTER], [SLEEP], [DISPLAY] simultaneously.
2. When enter this mode, it turns on all segments of the LCD.
3. In this mode, it displays as follows.
3. In this mode, it displays as follows.
[BAND] button
: Date/Version display
[AUDIO IN] button: Destination display
4. To exit from this mode, press three buttons of [ENTER],
[SLEEP], [DISPLAY] simultaneously.
SECTION 5
ELECTRICAL ADJUSTMENTS
CD SECTION
RF SIGNAL CHECK
Procedure:
1. Connect the oscilloscope to TP (RF) and TP (VC) on the CD
board.
2. Insert the disc (PATD-012) (Part No. : 4-225-203-01).
3. Press the [ ] button.
4. Confirm that the oscilloscope waveform is as shown in the
3. Press the [ ] button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
•
RF signal reference waveform (eye pattern)
Connecting Location:
u
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 200 ns
TIME/DIV: 200 ns
0.9 to 1.7 Vp-p
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
IC701
TP (VC) TP (RF)
– CD Board (Conductor Side) –
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