Magnavox 19MDTR20 - Dvd-video Player, Руководство по обслуживанию

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Audio Block Diagram
BLOCK DIAGRAM FOR SECTION 2 (DECK MECHANISM)
MAIN CBA
POWER SUPPLY / AV CBA
PB-AUDIO SIGNAL DVD AUDIO SIGNAL REC-AUDIO SIGNAL
1-5-5
IC1401
TD857BLA 1-5-6
BIAS
OSC
Q1872
P-ON+5V
P-ON+5V
Q1871
Q1873
Q1874
Q1875
(AUDIO PROCESS)
N-A-IN
N-A-OUT
TP1802
NA-IN-YCA
AUDIO
HEAD
AC HEAD ASSEMBLY
A-COM
A-PB/REC
CL1402
CN1804 CN2803
AUDIO
ERASE
HEAD
AE-H
AE-H/FE-H
1
2 FE-H
FE-H GND
FULL
ERASE
HEAD
CN1403
4
3
1
2
FE HEAD UNIT
REC
AMP
7 98 6
AUTO
BIAS
99
LINE
AMP
MUTE 96
P
R
ALC
71 12
D-REC-H
D
-R
E
C
-H
E
X
T-
H
A-MUTE
EXT-H
FROM SERVO/SYSTEM
CONTROL BLOCK
4
78
11
WF7
WF8
FROM/TO SERVO/SYSTEM
CONTROL BLOCK
3
1
EQ
AMP
100
SP/LP-ON
2
IC1802
(OUTPUT SELECT)
IC2201
(OP AMP)
JK1801
HEADPHONE
JACK
SPEAKER
R-CH
CN1802
CN1805
SP1802
FROM/TO
Hi-Fi AUDIO
BLOCK
FROM DVD
AUDIO BLOCK
<DVD SECITON>
CN601
FROM
Hi-Fi AUDIO
BLOCK
SW CTL.
Q2204
Q1803
CN2401
Q2202
JK2201
DIGITAL
A-OUT
(COXIAL)
A-OUT(L)
A-OUT(R)
A-OUT(R)
A-OUT(L)
2
1
12
13
14
15
11 10
6
2
1
7
Q2205
BUFFER
IC1801
(AUDIO AMP)
DC VOL.
5
2
12
7
6
Q2207
76
80
7 DVD-A-MUTE
1 SPDIF
4 DVD-A(R)
6 DVD-A(L) 8 8 DVD-A(R)
7 7 DVD-A(L)
11 11 JACK-MUTE
10 10 DVD-A-MUTE
5 5 JACK-OUT(R)
4 4 JACK-OUT(L)
FUNCTION CBA
SPEAKER
L-CH
CN2801 CN2805
SP2801
SP-R 1
SP-GND 2
SP-L 1
SP-GND 2
2 2 SP-L
DVD-A-MUTE
CL1802
CL2801
FROM SERVO/SYSTEM
CONTROL BLOCK
VOL-CONT
Q1212
DVD-H
JACK-MUTE
AL+5V
WF19
WF20
DATA(AUDIO) SIGNAL
NOTE FOR WIRE CONNECTORS:
1. PREFIX SYMBOL "CN" MEANS CONNECTOR.
(CAN DISCONNECT AND RECONNECT.)
2. PREFIX SYMBOL "CL" MEANS WIRE-SOLDER
HOLES OF THE PCB.
(WIRE IS SOLDERED DIRECTLY.)
TEST POINT INFORMATION
:INDICATES A TEST POINT WITH A JUMPER WIRE ACROSS A HOLE IN THE PCB.
:USED TO INDICATE A TEST POINT WITH A COMPONENT LEAD ON FOIL SIDE.
:USED TO INDICATE A TEST POINT WITH NO TEST PIN.
:USED TO INDICATE A TEST POINT WITH A TEST PIN.