Sony D-NE33, Руководство по обслуживанию

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