Sony TA-VE150 Service Manual ▷ View online
– 5 –
SECTION 3
TEST MODE
This equipment is provided with a test mode built in the micro-
computer. The contents are described in the following.
computer. The contents are described in the following.
[Initial Mode]
1. Press
I/
u
button while pressing both
[VIDEO]
and
[5.1CH INPUT, DVD]
buttons simultaneously.
2. “INITIAL” is displayed on the fluorescent indicator tube, and
the status of the unit is set in the following.
• All Memory is clear.
• Center, rear level set to 0.
• Center mode set to Phantom.
• DBFB clear.
• Muting clear.
• Volume level set to min.
• Center, rear level set to 0.
• Center mode set to Phantom.
• DBFB clear.
• Muting clear.
• Volume level set to min.
[Factory Mode]
1. Press
I/
u
button while pressing three buttons of
[TV]
,
[DVD, 2CH]
, and
[5.1CH INPUT, DVD]
simultaneously.
2. Factory setting same as initial except center mode set to nor-
mal using jog can set to volume max or min directly.
[FL Check Mode]
1. Press
I/
u
button while both
[CENTER MODE]
and
[VIDEO]
buttons simultaneously.
2. Fluorescent indicator tube and LED are checked, “FINISH” is
displayed and the status of the unit is set back in normal con-
dition.
dition.
[Gain Up Mode]
1. Press
I/
u
button while pressing
[SURROUND MODE]
but-
ton.
2. “GAIN UP” is displayed on the fluorescent indicator tube and
the rear is gained up 3 dB.
3. To exit from this mode, press two buttons in the same manner
as step1.
“NORMAL” is displayed on the fluorescent indicator tube and
the status of the unit is set back in normal condition.
“NORMAL” is displayed on the fluorescent indicator tube and
the status of the unit is set back in normal condition.
[Version Mode]
1. Press
I/
u
button while pressing both
[CENTER MODE]
and
[SURROUND MODE]
buttons simultaneously.
2. Version of its destination is displayed on the fluorescent indi-
cator tube.
– 6 –
• Circuit Boards Location
SECTION 4
DIAGRAMS
POWER SW borad
DISPLAY board
JOG board
MAIN board
STANDBY board
PRIMARY board
SECONDARY board
– 7 –
4-1.
NOTES FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
•
p
: parts mounted on the conductor side.
• b
: Pattern from the side which enables seeing.
• Indication of transistor.
•
U
: B+ Line.
•
V
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : VIDEO
no mark : VIDEO
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FRONT/AUDIO IN
f
: REAR
E
: CENTER
j
: WOOFER
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
– 8 –
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC300
#¡
(OSC)
– DISPLAY Board –
1
IC201
#¢
(X1)
3.4 Vp-p
8 MHz
4.3 Vp-p
4.19 MHz
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