Philips VR540/39 Service Manual page 14

Hi-Fi Audio Block Diagram
" " = SMD
JACK CBA
JK101
CL101 CL151
A-IN1(R) 2 10 A-IN1(R) 10
A-IN1(L) 6 8 A-IN1(L) 8
6 A-OUT1(R) 6
A-OUT1(R) 1
A-OUT1(L) 12 A-OUT1(L) 12
3
JK102
CL102 CL152
A-IN2(R) 2 9 A-IN2(R) 9
8 A-IN2(L) 8
A-IN2(L) 6
A-OUT2(R) 1 6 A-OUT2(R) 6
A-OUT2(L) 3 11 A-OUT2(L) 11
Comparison Chart of
Models & Marks
Model Mark
VR540/39 D
VR540/58 E
VR740/02 F
VR740/07 G
VR740/16 H
VR740/39 I
VR740/58 J
VR742/16 K
VR742/39 L
VR742/58 M
N-A-REC
TO AUDIO BLOCK
N-A-PB
1-9-17
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.)
CN701
IC451
(Hi-Fi AUDIO SIGNAL PROCESS)
67
65
SW
SW
ALC ALC
ALC
62 70
61 71
52 47
56 R-CH
48
INSEL
54
50
60
2
6
10
L-CH
14
INSEL
8
4 15
ALC
+
78
80
: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
AFV CBA
CN1 CN1 CN701
4 TU-AUDIO(R) 4 2 SIF 2
IF SIGNAL
5 TU-AUDIO(L) 5 PROCESS 1 TU-AUDIO 1
OUTPUT
VCO
SELECT
SW R-CH
COMP
BPF
NOISE
R-CH
PNR
P
NOISE
DET
R
LIM DEV VCO
HOLD
PULSE
LPF
MIX
LPF
LIM DEV VCO
R
L-CH
DO
PNR
DET
P
SW L-CH
COMP
BPF
NOISE
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
CL509
2 A-OUT1(L)
1 A-OUT1(R)
SUB JACK CBA
MUTE-ON
73
74
72
MUTE
E,F,G,H,J,K,M
76
77
MUTE-ON
75
IIC-BUS SDA
37
LOGIC IIC-BUS SCL
38
Q451
A-MODE
ENV
21
DET
LINE-MUTE
53
MUTE
Hi-Fi-H-SW
39
V/I
CL253
R
24 Hi-Fi- A(R) 9
LIM 26 Hi-Fi -COM 8
Hi-Fi- A(L) 7
L 27
34 33
1-9-18
Mode : SP/REC
JK751
A-OUT
(L)
A-OUT
(R)
F,G,H,I,J,K,L,M
TU701
22 SIF OUT
21 AUDIO OUT
2 AUDIO IN
FROM/TO SYSTEM
CONTROL BLOCK
CYLINDER
ASSEMBLY
Hi-Fi
AUDIO
(R) HEAD
Hi-Fi
AUDIO
(L) HEAD
HE473BLH