Sony HT-ST7 Service Manual page 52

HT-ST7
• Waveforms
– MAIN Board –
IC3506 <zzc (XTALOUT) IC601 1 (BOOT)
1 7
1.8 Vp-p
36.6 ns
1 V/DIV, 20 ns/DIV 10 V/DIV, 2 s/DIV
IC904 r; (XTO) IC602 1 (BOOT)
2 8
2.4 Vp-p
40.6 ns
2 V/DIV, 20 ns/DIV 10 V/DIV, 2 s/DIV
3 IC5001 wg (XTAL2) 9 IC603 1 (BOOT)
3.2 Vp-p
39.6 ns
3.1 s
2 V/DIV, 20 ns/DIV 100 mV/DIV, 2 s/DIV
IC5001 ok (BCLK_OUT)
4 0 IC605 1 (BOOT)
4.1 Vp-p
324 ns
3 s
2 V/DIV, 200 ns/DIV 10 V/DIV, 2 s/DIV
IC5001 ol (LRCLK_OUT)
5
3.8 Vp-p
20.8 s
2 V/DIV, 10 s/DIV
IC1002 qa (Xout)
6
2.6 Vp-p
125 ns
2 V/DIV, 50 ns/DIV
HT-ST7
– DISPLAY Board –
Q801, 802 (Base)
qa
18.8 Vp-p
11.4 s
3 s
2 V/DIV, 5 s/DIV
qs Q801, 802 (Collector)
19.6 Vp-p
11.4 s
2.9 s
20 V/DIV, 5 s/DIV
0.1 Vp-p
21.2 Vp-p
• IC Block Diagrams
– MAIN Board –
IC601, 602, 605 RT8293ALZSP
IC603 RT8252ALGSP
8 7
3.7 Vp-p
2.7V 1.2V
INTERNAL
REGULATOR
VA VCC
27.2 Vp-p
SLOPE COMP
VA
CURRENT SENSE
AMPLIFIER
1 2
IC901 SRC4182
LGRP 1
REFERENCE
RCKI 2
CLOCK
NC 3
SDIN 4
AUDIO
BCKI 5
INPUT
PORT
LRCKI 6
VIO 7
DGND 8
BYPAS 9
IFMT0 10
CONTROL
IFMT1 11
LOGIC
IFMT2 12
RST 13
MUTE 14
52 52
IC604, 3704 BD00IC0WEFJ-E2
8 7 6
6 5
OVER CURRENT
PROTECT
VCC
THERMAL
SHUTDOWN
0.8V 0.4V
1
OSCILLATOR
FOLDBACK
CONTROL
S R
Q Q
3 4
INTERPOLATION DECIMATION
RE-SAMPLER
FILTERS FILTERS
28 MODE2
27 MODE1
26 MODE0
RATE
ESTIMATOR
25 BCKO
AUDIO
24 LRCKO
OUTPUT
23 SDOUT
PORT
22 VDD
21 DGND
20 TDMI
19 OFMT0
18 OFMT1
17 OWL0
16 OWL1
15 RDY
5
SOFT
+
START
+
2 3 4