Sylvania SRD4900, Service Manual

Page: 21 / 97

1-9-1
BLOCK DIAGRAMS
Servo / System Control Block Diagram
H9602BLS
M
M
LOADING MOTOR
CYLINDER ASSEMBLY
SENSOR CBA SENSOR CBA
CAPSTAN MOTOR
DRUM MOTOR
PG SENSOR
CONTR
OL
HEAD
CL504
CL502
CL504
AC HEAD ASSEMBLY
MAIN CBA
KEY- 2
RF-SW
C-FG C-CONT D-PFG ST-S T-REEL
C-F/R
KEY- 1
D-V SYNC
C-SYNC
V-ENV
CTL(+) RESET
C-ROTA
D-REC-H
D-REC-H
REC- SAF-SW
PG-DELAY
A-MUTE-H
A-MUTE-H A-MUTE-H
RF-SW
D-V SYNC
C-SYNC
V-ENV
C-ROTA
END-S
IC501 (SERVO/SYSTEM CONTROL)
47 56
CTL
58
CTL(-)
57 28 49 69 62
3
20 27 65
18 78 64 19 41
2
24
7
66 67
LM-FWD/REV
21
D-CONT
29
(DECK ASSEMBLY)
END-S
T-REEL T-REEL
ST-S
ST-S
Q504 Q503
Q501
RESET
Q506
SW-POINT
AL+5V
VR501
TIMER+5V
TP506
TP505
END-S TP507
P-ON-L
22
P-ON-L
P-DOWN-L
1
P-DOWN-L
H-A-SW
79
H-A-SW
H-A-COMP
80
H-A-COMP
46
OUTPUT SELECT
YCA-SCL
YCA-SDA
YCA-CS
YCA-SCL
14
YCA-SDA
15
YCA-CS
16
YCA-SCL
YCA-SDA
YCA-CS
SW511
REC SW
TO VIDEO BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM TO Hi-Fi AUDIO BLOCK DIAGRAM
WF12 WF13
CLOCK DATA
TU701(TUNER UNIT)
11 12
VCR/TV
5
DVD-H IND
71
TIMER-IND
75
REC-IND
72
D567
D
V
D
D566
VCR
D564
TIMER
D565
REC
D571
PO
WER
AL+5V
Q563 Q565 Q566 Q567
LD-SW
68
AL+12V(1)
AL+5V
DVD-L IND
70
AL+5V
SW512
AL+18V
P-ON+5V
LD-SW
AL+5V
D555 S-LED
TO POWER SUPPLY BLOCK DIAGRAM
IIC-BUS SCL
IIC-BUS SDA
12 13
IIC-BUS SCL
77
VCR/TV
IIC-BUS SDA
NORMAL-L
ST/SAP-MODE
61 59
Hi-Fi-H-SW
Hi-Fi/NOR-IN
ST/SAP-IN
Hi-Fi-H-SW
25
KEY SWITCH KEY SWITCH
TP502
P-ON+9V
S-INH
M
CAPSTAN MOTOR
5
CTL(+)
6
CTL(-)
1
AL+12V(1)
2
P-ON+5V
3
C-FG
4
C-F/R
5
C-CONT
6
GND
7
LM-FWD/REV
8
D-CONT
9
D-PFG
10
GND
11
AL+12V
12
AL+18V
TP513
CTL
OUTPUT-SELECT OUTPUT-SELECT
DVD-POWER
DVD-POWER
26
TO DVD SYSTEM CONTROL BLOCK DIAGRAM <DVD SECTION>
REMOTE-VIDEO
5
REMOTE-VIDEO