Philips VR109/55 Service Manual page 22

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Audio Block Diagram
JK751
A-OUT
JK752
A-IN
TU701
TU-AUDIO 21
(DECK ASSEMBLY)
ACE HEAD ASSEMBLY
AUDIO
HEAD
AUDIO
ERASE
HEAD
FE HEAD
FULL
ERASE
HEAD
NOTE FOR WIRE CONNECTORS: TEST POINT INFORMATION
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.)
" " = SMD
2
AUDIO
CN287 CN504
A-PB/REC 4 7 A-PB/REC
A-COM 3 6 A-COM
AE-H 1 4 AE-H
AE-H/FE-H 2 5 FE-H
CN501
1 FE-H
2 FE-H-GND
1-10-5
06/28/2012
: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.
MAIN CBA
TP752
A-OUT
IC301
(AUDIO PROCESS)
PB-ON
4 EQ
AMP
3
SP/LP-ON
2
Q402
BIAS
OSC
AUTO
99
BIAS
Q401
P-ON+5V
Q404 (PB=ON)
SWITCHING
D-REC-OFF
Q403
P-ON+5V
Q405
(PB=ON)
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
98 76
TUNER LINE
ALC
R LINE
MUTE
AMP
1 100
P
REC
6 7
AMP
SERIAL
DECODER
10 23 24
1-10-6
World of Free Manuals
Mode : SP/REC
96
98
BUS SDA
BUS SCL
TO SERVO/SYSTEM
A-MUTE-H
CONTROL BLOCK
D-REC-H
H67T0BLA