Sony SRS-Z750 Service Manual page 4

SRS-Z750/Z750PC
2-3. PRINTED WIRING BOARD (SRS-Z750PC)
• Semiconductor
Location
Ref. No. Location
D1 D-2
D2 D-2
D3 F-2
IC1 D-2
IC2 E-3 Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
Q1 D-3
Q2 D-3 • b : Pattern from the side which enables seeing.
2-4. SCHEMATIC DIAGRAM (SRS-Z750PC)
– 5 –
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1 / W or less unless otherwise
4
specified.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 15 V and fed with regulated dc power
supply from external power voltage jack.
• Voltage is dc with respect to ground under no-signal
condition.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F : AUDIO
• IC Block Diagram
IC1 LA4663
INPUT
RIPPLE FILTER/
1 AMP
STARTING TIME
+
IN1 2
PRE GND 3 –
+
IN2 4
STANDBY 5 –
SIGNAL MUTE 6
INPUT
VCC1 7
AMP
VCC2 8
+OUT2 9
POWER GND2 10
–OUT2
11
–OUT1 12
POWER GND1 13
+OUT1 14
– 6 –
OUTPUT
AMP
OUTPUT
AMP