Sony CFD-CD777SMK2 - Page 34

CFD-CD777SMK2
3434
•Waveforms
– MAIN Board –
2 IC701 ea (RFO) (CD PLAY MODE)
500 mV/DIV, 500 ns/DIV
3 IC701 rf (TI) (CD PLAY MODE)
50 mV/DIV, 1 µs/DIV
4 IC702 3 (MDP) (CD PLAY MODE)
1 V/DIV, 2 µs/DIV
6 IC702 ws (BCK) (CD PLAY MODE)
2 V/DIV, 200 ns
7 IC702 wg (XPCK) (CD PLAY MODE)
2 V/DIV, 100 ns/DIV
8 IC702 wk (RFCK) (CD PLAY MODE)
2 V/DIV, 50 µs/DIV
9 IC702 eg (XTAO) (CD PLAY MODE)
2 V/DIV, 20 ns/DIV
1 IC701 2 (FI) (CD PLAY MODE)
50 mV/DIV, 1 µs/DIV
5 IC702 w; (LRCK) (CD PLAY MODE)
2 V/DIV, 10 µs/DIV
1 IC801 ya (EXT)
2 V/DIV, 100 ns/DIV
– CONTROL Board –
Approx.
150 mVp-p
1.2 ± 0.2 Vp-p
Approx.
100 mVp-p
2.6 Vp-p
7.5
µ s
5 Vp-p
22.8
µ s
6.2 Vp-p
472 ns
5.3 Vp-p
232 ns
5.4 Vp-p
136
µ s
4.6 Vp-p
59 ns
4.6 Vp-p
239 ns
• IC Block Diagrams
– MAIN Board –
IC1 CXA1238S
VCO
REGULATOR
FM FRONT-END
AM FRONT-END
MPX
REGULATOR
MONO/STEREO
SELECT
DECORD
AMP
MUTING
AUTO
BLEND
TUNING
INDICATOR
AM IF/
DET
FM IF/
DISCRI
RIPPLE
FILTER
BAND-PASS
MUTE
1
27
28
2930 242526 212223 181920 1617
2 3 4 5 6 7 8 9
PLL LPF1
PILOT DET LPF2 PILOT DET LPF2
ST IND/VCO CHECK
L-CH OUT
VCC
R-CH OUT
RIPPLE FILTER
AGC AFC1
10
AGC AFC2
13
FM IF IN
14
AM IF IN
15
BAND SELECT
11
GND
12
TUNE IND
1/2
COUNTER
1/2
COUNTER
PD1
PD2
FM/AM FE OUT FM GND
FM RF IN AM RF IN FM RF REG FM OSC AFC AM OSC MUTE FM DISCRI GND PLL LPF2 MPX REG VCO