- 9 -
RF PATTERN TESTING
NAD - C 546BEE PCB TESTING POINTS DIAGRAM
TESTING PROCEDURE
(1) Load the test disc (Sony Test CD YEDS-7) and set the unit into PLAY mode.
(2) Connect the scope to C3 (Pin 4 of IC701) and DGND (J215).
Scope setting:
Coupling
: AC.
Vertical sensitivity
: 0.2 V/ div.
Horizontal time base
: 0.5 µS/div.
(3) Observe the waveform is 1.5V p-p +/-5% and the eye pattern is at its best shape (see
FIG. 1
).
FIG. 1 (a)
FIG. 1 (b) Poor eye pattern
FIG. 1 (C) Good eye pattern
3T 4T 5T – 11T
1
3
4 6
SLT-
SLT+
FM-
FM+
DM-
DM+
FE
-
TE
-
TE
+
FE
+
PD
VR
LD
G
N
D
F
C
B
A
D
E
SV
CC
VR
EF
T5
CJ
3-7
D
13
TC
94
A
93
FG
CL-SW
OP/CL-COM
OP-SW
LM-CL
LLM-OP
GND
USB-
USB-
USB-
DET
UPDATE
POWER
AM1
MCU-
TEST
USB-
RST
MCU-
RST
USB-
RX
USB-
TX
VC
C
D
-
D
+
D
G
N
D
PCB-SERVO
1725-970B+000B
Q
70
1
Q
71
Q2
C7
07
C7
08
C712
C7
15
C717
C734
C735
C743
C744
C745
C746
C2
7
C28
C29 C52
C56
C6
C7
C7
01
C7
02
C705
C706
C7
10
C713
C7
14
C716
C719
C7
21
C723
C724
C7
28
C7
31
C7
33
C7
37
C7
38
C740
C742
C7
56
C760
C761
C765
C768
C770
C7
71
C7
72
C7
74
C7
75
C777
C781
C783
C7
57
C791
C711
C718
C7
26
C7
27
C7
63
C7
64
C7
03
C7
04
C7
20
C7
22
C7
25
C7
30
C7
32
C7
41
C7
66
C7
67
C7
69
C7
73
C7
76
C778
C7
79
C780
C7
82
C2
5
C5
1
C7
6
C6
0
C7
5
C7
39
C785
C2
6
C8
C7
58
C7
59
C7
62
C5
3
C54
C59
C74
C77
C7
8
D5
D6
L7
03
L705
L706
L7
07
L7
08
L7
09
CN701
L1
0
L1
1
U
11
IC
3
CN08
JR
0
JR701
R1
R10
R11
R16
R19
R2
R2
3
R3
R4
R46
R50
R52
R53
R55
R56
R57
R63
R64
R65
R66
R6
7
R7
R7
01
R702
R7
03
R7
04
R705
R706
R707
R708
R709
R710
R711
R712
R713
R714
R715
R716
R7
17
R718
R719
R720
R721
R722
R723
R724
R725
R7
27
R7
28
R7
29
R7
30
R7
31
R7
32
R7
33
R734
R7
35
R7
36
R7
37
R7
38
R739
R740
R741
R742
R743
R744
R745
R746
R747
R748
R749
R7
50
R7
51
R7
52
R7
53
R7
56
R757
R758
R759
R760
R761
R762
R763
R764
R765
R766
R767
R768
R769
R770
R771
R772
R773
R7
74
R7
75
R7
76
R7
77
R7
78
R7
79
R7
80
R7
81
R7
82
R783
R8
R8
23
R8
24
R8
25
R8
26
R8
27
R828
R8
29
R51
R5
4
R20
R2
1
R2
2
R4
8
R49
R1
3
R1
4
CN
4
IC
70
7
IC
4
IC6
IC
70
1
IC
70
3
X7
02
R15
R30
C729
C736
X7
01
R31
R32
R3
3
R3
4
R3
5
R3
6
C78
4
C2 C5
C1
J215
IC1
Q
22
0
C3
C4
R1
7
R1
8
R2
5
R2
7
R5
R6
R9
CN1B
Q
1
R1
2
R2
4
R2
6
R8
30
R28
R29
R3
7
JP108
1V
5
8V
BC
LK
D
AT
A
G
N
D
LR
CL
K
M
CL
K
SP
D
IF
J220
J1
Test Point
