Sony D-NE330 Service Manual page 16

D-NE330/NE331
• Waveforms
– MAIN Board –
IC801 tg (XTAL)
1
1.1 Vp-p
45.5 ns
500 mV/DIV, 20 ns/DIV
IC801 yd (SYNC)
2
(CD play mode)
2.2 Vp-p
5.7 µ s
1 V/DIV, 2 µ s/DIV
IC801 if (RFACI)
3
(CD play mode)
550 mVp-p
200 mV/DIV, 200 ns/DIV
IC401 9 (L2L)
4
2.6 Vp-p
5.7 µ s
1 V/DIV, 2 µ s/DIV
IC302 5 (EXT), Q301 (Gate)
5
2.2 Vp-p
3.7 µ s
1 V/DIV, 1 µ s/DIV
Q301 (Drain)
6
3.6 Vp-p
3.7 µ s
2 V/DIV, 1 µ s/DIV
D-NE330/NE331
• IC Block Diagram
– MAIN Board –
IC301 BH3544F-FE2
OUT1 1
MUTE 2
IN1 3
+ +
GND 4
IC302 XC6367A281MR
PHASE
1
VOUT
COMPENSATION
PWM
ERROR AMP
COMPARATOR
2
VDD
+
+
–
–
PWM/PFM
CONTROLER
REFERENCE
VOLTAGE WITH
RAMP WAVE
CE
3
SOFT START/
GENERATOR/
CHIP ENABLE
OSC
IC603 XC6213B212NR
ON/OFF
CE 1
CONTROL
CURRENT +
LIMIT
–
VOLTAGE
REFERENCE
VSS 2
16 16
20 VCC
19 OUT2
18 BIAS
17 IN2
BUFFER/
5 EXT
DRIVER
GND
4
4 VIN
3 VOUT