Zenith XBS344 Series, Service Manual

Page: 36 / 159

3-30 3-31
7. SYSTEM BLOCK DIAGRAM
GND
MODE S1
MODE S2
MODE S3
MODE S4
MODE S/W
TO/FROM AVCP
T-UP REEL
TAPE TOP
SUP REEL
CST.SW/REC TAP
5V
CS501
5.3VA
5.3VA
ES501
R550
LD501
DECK IR LED
R553
R555
RS501
RS502
R556
R558 C582
R538
R535
R537
R536
C534
R544
C552
R5C6
C500
R541
R529
R583
L512
MS501
X502
14MHz
32.768KHz
OSC
OSC
X501
1
2
RESET
GND
Vcc 3
5.3VA
5V
IC504
+
+
C592
+
C503
L501
R557
TAPE
END
ES502
C535
R564
R531
OSC
L511
R598
C595
C596
+
C561
TO/FROM DECK
Q503
Q501
CV IN
25
24
23
22
21
79
58
80
88 49 40
37
98
34
IC501
M37760
MODE S1
I-Limit
MODE S2
MODE S3
MODE S4
TOP Sensor
T/U REEL
SUP Reel
CST IN
Vss (AMP)
Vss (OSD) Vss (SYSCON) Vcc (SYSCON)
Vcc (SERVO)
CAP. PWM
CTL +
CTL -
CFG
CAP. REV 'H'
LD CTL
V. ENV
V.H.SW30
DPG
D.V.Sync
38
39 X out
Xc in
Xc out
X in
35
36
44
OSC in 2
95 94
87 12 60
9 18 76
90
13
H.A.SW
SQPB
16 59
77 11
DRUM PWM
53
Vcc (OSD)
20 END Sensor
45
OSC out 2
99
Vcc (A/D)
TO/FROM AUDIO(Hi-Fi)
TO/ FROM TU/IF
TO DIGEST
72
100
26 VCR 'H'
PLL DATA
64
63
PLL CLK
CV OUT
AFT
71
52
POWER FAIL 78
A. MUTE 'H'
A. ENV
A. H.SW
REC 'H' 74
68
71
72
CLK I C
2
I C
2
DATA
74
50
COMP IN
17
REC 'H'
15 C.ROT
84 A.MUTE'H'
S clk
S in
S out
8
19
67
66
65
R/C
14
TO Hi-Fi ONLY
2
GND
Vcc
3
IC505
1
DT-65780M's
(X2) DATA
CVIN FROM A/V 50 (X2) DATA
(X2) CLK
PM6001
IC601
FLD DRIVE IC
FLD P6M01
OSD