Sony CDX-GT250M Service Manual page 26

CDX-GT250M
Q Q
3 7 6 3 1 5 1 5 0
• IC Block Diagrams
IC1 BA5968FP-E2 (SERVO Board (2/2))
FWD 1
FWD REV
LDCTL 2
OUTR OUTF
NC 3
OPOUT1 4
NC 5
NC 6
OPOUT2 7
POWVCC 8 VCC
VOL– 9
VOL+ 10
VOL2– 11
LEVEL
SHIFT
12
VOL2+
VO1– 13
LEVEL LEVEL
SHIFT SHIFT
14
VO1+
T E
L 1 3 9 4 2 2 9 6 5 1 3
w w w
CDX-GT250M
28 REV
27
OPIN4+
26 OPIN4–
25 OPOUT4
24 OPIN3+
23 OPIN3–
22 OPOUT3
MUTE MUTE
21
20 VOL+
19
GND
18 VOL3–
LEVEL
SHIFT
17
VOL3+
VOL4–
16
15 VOL4+
x a o
. i
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IC401 BD3806AFS-E2 (MAIN Board (1/3))
32 31
2
I
LOGIC
BASS
fo:60,70,80,100,120,140,160,200Hz
Q:0.5,0.75,1,1.25
MIDDLE
fo:500Hz,1kHz
Q:1
TABLE
fo:5,7.5,10,12.5kHz
Q Q
3 7 6
VCC/2
1 2
u 1 6 3
y
26 26
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2 4
8 9 9
30 29 28 27 26 25 24 23 22
VCC
FADER FADER FADER FADER
(0~-58, (0~-58, (0~-58, (0~-58,
C BUS
VCO
-∞dB) -∞dB) -∞dB) -∞dB)
2ND ORDER LPF
fc:OFF,80,120,160Hz
Q: 0.707
TONE TONE
PASS PASS
BASS,TREBLE, MIDDLE BASS,TREBLE, MIDDLE
(-15dB~+15dB,1dB STEP) (-15dB~+15dB,1dB STEP)
VOLUME VOLUME
(+23~-79dB,-∞dB (+23~-79dB,-∞dB
1dB STEP) 1dB STEP)
fc:53.3kHz fc:53.3kHz
ANTI-ALIASING ANTI-ALIASING
FILTER FILTER
3 1 5 1 5 0 8 9
INPUT GAIN INPUT GAIN
(0~15dB,1dB STEP) (0~15dB,1dB STEP)
MUTE MUTE
INPUT SELECTOR
(3 STEREO INCLUDE 1 ISOLATION INPUT)
3 4 5 6 7 8 9 10
m
c o
.
2
8 9 9
21 20 19 18 17
GAIN+ATT
(+10~-29,
-∞dB)
2ND ORDER
LPF
MIX
2 4 9 8 2 9 9
11 12 13 14 15 16