Service manual

3030
HCD-GNZ55D
HCD-GNZ55D
6-4. BLOCK DIAGRAM — AUDIO SECTION —
41
4
2
7
9
43
SERIAL CLOCK
BUFFER
IC3
SYSTEM CONTROL
IC401(2/4)
E–3
OPEN SWITCH
76
SM LATCH1
77
SM CLK
78
SM DATA
65
SM RESET
72
SM SD
86
HP MUTE
85
HP DET
44
E–2
45
E–1
42
TABLE SENSE
48
LM–F
DBFB FEED BACK
FRONT L
R-CH
ADC RESET
IC701
M751
(LOADING)
M741
(TABLE)
LOADING
MOTOR
DRIVE
4
2
IC712
TABLE
MOTOR
DRIVE
M
M
Q731
IC731
TABLE
ADDRESS
SENSOR
A/D CONVERTER
IC11
1
2
7
15
12
10
11
CLOSE OPEN
RE701
D
MAIN
SECTION
C
MAIN
SECTION
S751
OPEN/CLOSE
DETECT
DISC TRAY
ADDRESS
DETECT
L IN
R IN
SCKI
PDWN
D OUT
LRCK
BCK
49
LM–R
46
TM–F
47
TM–R
7
9
11
D/A CONVERTER
IC600
36
XFSIIN
31
DATA
30
BCK
29
LRCK
21
SCDT
19
SOFTMUTE
18
NSPMUTE
22
SCSHIFT
27
INIT
INIT
NSP MUTE
SOFT MUTE
23
SCLATCH
OUTL1
OUTL2
HPOUTL1
HPOUTL2
9
AMP
IC630
33
4
PWM A
UNREG+8V
6
PWM B
OUT A
OUT B
30
OUT C
25
OUT D
22
/SD
3
RESET AB
5
RESET CD
15
45
43
R-CH
R-CH
HPOUTR1
HPOUTR2
41
39
XFSOOUT
48
R-CH
R-CH
R-CH
R-CH
R-CH
HP AMP
IC880
DC DETECT
Q860,861
FRONT
SPEAKER
PHONES
J1401
L
R
MUTE
Q1400,1401
DC DETECT
Q840
SERIAL CLOCK
BUFFER
IC802
MUTE CONTROL
Q486
D486
TM1500
X1
12.288MHz
X801
49MHz
• Signal path
: AUDIO
: DIGITAL
(Page 29)
(Page 29)