Magnavox ZV420MW8 - DVDr/ VCR Combo, Service Manual

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1-11-1
BLOCK DIAGRAMS
System Control Block Diagram
E9E8ABLS
86
KEY- 2 KEY- 1
S-DATA-OUT
SYS-RESET
S-DATA-IN
S-CLK
READY/BUSY
PO
WER
CN2212
CN2211
D1561
PO
WER
SW1601
KEY SWITCH (VCR)
KEY SWITCH (DVD)
TP502
S-INH
44
POWER-SW
11
AL+5V
22
POWER-LED
POWER SW CBA
DVD OPEN/CLOSE SW CBA
CN2210
CN2209
OPEN/CLOSE SW1615
DUBBING SW1617
27
SYS-RESET
29
RDY
28
SUB-TXD
30
SUB-RXD
26
SUB-SCLK
27 29 28 30 26
CN2201
Q1510
Q1509
CN701
BUFFER
SYS-RESET RDY SUB-TXD SUB-RXD SUB-SCLK
IC101
IC107
MAIN MICRO CONTROLLER
22
OPEN/CLOSE-SW
11
DUBBING-SW
85
AL+5V
RF-SW
D-V SYNC
C-SYNC-IN
V-ENV
DISPLAY-ENA RESET
C-ROTA
D-REC
D-REC
VCR-AUDIO-MUTE
AUDIO-MUTE AUDIO-MUTE
RF-SW
D-V SYNC
C-SYNC
V-ENV
C-ROTA
IC1501 (SYSTEM CONTROL)
IC1571 (VFD DRIVER)
6
25
23 98 83 24 50 29 31
Q1501
RESET
TIMER+5V
P-ON-L PWR-SW
27 43 77
H-A-SW
99
H-A-SW
H-A-COMP
100
H-A-COMP
55
OUTPUT-SELECT
YCA-SCL
YCA-SDA
YCA-CS
YCA-SCL
19
YCA-SDA
20
YCA-CS
21
YCA-SCL
YCA-SDA
YCA-CS
TO VIDEO BLOCK DIAGRAM TO VIDEO OUTPUT SELECT BLOCK DIAGRAM TO VIDEO INPUT SELECT BLOCK DIAGRAM TO AUDIO INPUT/OUTPUT SELECT BLOCK DIAGRAM TO AUDIO BLOCK DIAGRAM TO Hi-Fi AUDIO BLOCK DIAGRAM
TO POWER SUPPLY BLOCK DIAGRAM
IIC-BUS SDA
IIC-BUS SCL
17 18
IIC-BUS SCL
IIC-BUS SDA
NORMAL-L
78
Hi-Fi-H-SW
Hi-Fi/NOR-IN
Hi-Fi-H-SW
30
OUTPUT-SELECT
90
OUTPUT-SELECT2
OUTPUT-SELECT2
OUTPUT-SELECT
DISPLAY-DATA
7
DISPLAY-CLK
CLK
1G 2G 4G 5G 6G 7G a b c d e
f h i g
3G
GRID
SEGMENT
VFD
STB DIN
8
REMOTE
5
REMOTE SENSOR
RS1501
FL1501
2
28
1
21 22 23 18 17 19 20
9 8 7
12 13 14 16 11 10
60 61
AUDIO-SW1 AUDIO-SW2
AUDIO-SW1 AUDIO-SW2
59
VIDEO-SW1 VIDEO-SW2
57
VIDEO-SW3
58
VIDEO-SW1 VIDEO-SW2 VIDEO-SW3
FAN-CONT
P-ON-L PWR-SW FAN-CONT
DVD MAIN CBA UNIT
97 94 92
DVD-LED
D1562
D
V
D
D1563
V
CR
VCR-LED
95
VCR-LED
96
DVD-LED
POWER-LED
93
POWER-LED
AL+5V
R25
SYS-RESET
R2
W26
V25 P22
B4
13 44 12 11
2
1
2
MAIN CB
A
OUTPUT-SELECT2
REG-CONT1
46 45
1
REG-CONT2 P-DOWN-H
REG-CONT1 REG-CONT2 P-DOWN-H
RESET
+1.8V