BLOCK & CIRCUIT DIAGRAMS
1. POWER(SMPS) BLOCK DIAGRAM
BD101
LINE FILTER
BLOCK
!
(C101, L102, C102)
F101
!
R101
T101
!
TRANSFORMER
SNUBBER
+
C103
BLOCK
(D102, R104,
C105, C106)
6
4
7
RECTIFIER &
SMOOTHING
(D108, C120,
8
L104, C121)
RECTIFIER &
SMOOTHING
(D105, C115, R112, J151)
12 REG BLOCK
(Q152, ZD152, C155,
C152, R152)
D152
Hi-Fi
OPTION
TO SYS
12VA(Cap)
TO SYS
11
D151
13VA(DRUM)
TO Hi-Fi BUFFER
DRIVE & S/W
BLOCK
(IC101, C109, D103, R103, C129,
R109, R125, R126, C135, BC101)
10
RECTIFIER &
J152
(MONO OPTION)
SMOOTHING
(C116, D106,
11
3
L103, C117)
5V S/W
13VA
TO AVCP, OSD
5.1V
BLOCK
(Q155, R156, R157)
2
BK
(BR)
!
PW101
WH
(BL)
HOT GND
!
C112C113
!
HOT CIRCUIT
NOTES : Symbol denotes AC ground.
Symbol denotes DC chassis ground.
4
3
IC102
NOTES) W arning
NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
NOTES) electricial shock.
!
2
3-16 3-17
1
FEED-BACK
(R116, R117, R118,
R119, R120, R121,
IC103
BLOCK
C114)
5V S/W
BLOCK
(Q157, R170, R171)
PWR CTL
BLOCK
(Q156, R161)
TO SENSOR MOD
5.1V
FROM SYS
P.CTL "H"
TO SYS, MOD
5.3VA
2. Power(SMPS) Circuit Diagram
Power dead.
BD101,R101 are
defective.
12VA Power dead.
D109 is defective.
5.4VA Power dead.
D106 is defective.
(TO SYSTEM)
NOTE :
1. Shaded( ) parts are critical for safety. Replace only
with specified part number.
2. Voltages are DC-measured with a digital voltmeter
during TUNER mode.
Power dead.
F101 is defective.
NOTES) Symbol denotes AC ground.
NOTES) Symbol denotes DC chassis ground.
Switching dead.
IC101 is defective.
NOTES) W arning
NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
NOTES) electricial shock.
Switching error
IC102, IC103 are
defective.
36VA Power dead.
D105 is defective.
3-18 3-19
3. MODULATOR/JACK CIRCUIT DIAGRAM
3-20 3-21
4. AUDIO BLOCK DIAGRAM(MONO MODEL ONLY) 5. Y/C BLOCK DIAGRAM
1) PB Mode
VCA
DET
HA118717
IC301
PB EQ
AMP
AMP
11
2
AUDIO OUT
R/P HEAD
1) PB Mode
V.H/SW30
System
(FROM u-COM)
V.ENV
(TO u-COM)
SP CH2
SP CH1
81
84
86
REC-AMP
87
88
REC-AMP
89
SP CH2
SP CH1
IC301
HA118717
79 78
System
System
X302 X301
73 71
X-tal
VCO/OSC
CTL Trap
ACC
2M LPF
TRAP
HIFI Trap
FM AGC P.EQ G.EQ D LIM Y LPF
22
fh Trap
DATA
(FROM u-COM)
62 6963
Serial Cont
interface
C LPF DEALY
CLOCK
(FROM u-COM)
DEMO
S LPF
60 5875 35
C-CCD
CLOCK Drive
CLAMP
APC/ACC
DET
BDBPF
YNR NC
LPF
LPF
C.K
SYNC SEP
Sharpness
CONTROL
2126242318 19
+
+
VCA
Main
De-Empf
CCD LPF
1413
L- DET
Main
Conv2
Main
Conv1
NL
De-eMPH
CLAMP
Y-CCD
MIX
AMP
SQUEL CH
CLEAR
SYNC
FBC
Video ALC
46
44
39
42
V. OUT
52
(TO u-COM)
51
(FROM u-COM)
50
(TO u-COM)
56
D-V SYNC
C-SYNC
System
System
System
2) REC Mode
(From REAR Jack)
A.IN
2) REC Mode
System
System
DATA
CLOCK
(FROM u-COM)
Adjst
Serial Cont
interface
MIX
ATT
LPF
(FROM u-COM)
f0=1.68M
REC
Tra p
HPF
X-tal
VCO/OSC
LPF
TRAP
75
V.H/SW30
System
VCA
REC-AMP
SP CH2
REC-AMP
SP CH1
81
86
87
88
89
(FROM u-COM)
SP CH2
SP CH1
CLOCK Drive
6dB
AMP
ATT
-10dB
31
+
+
++
LINE
VIDEO IN
35
C-CCD
Y-CCD
ATT
-10dB
IC301
HA118717
APC/ACC
DET
SPFACC
SQUEL CH
CLEAR
SYNC
FBC
Video ALC
VIDEO
AGC
ATT
-10dB
29 21 26 24 23 18 19 50 22 20 14 13 15
Y-LPF
AGC DET
LPF
CLAMP
D.E.
YNR
CLAMP
VCA
REC
AMP
AMP
11
4
R/P HEAD
AUDIO OUT
System
System
V. OUT
(TO u-COM)
D-V SYNC
(TO u-COM)
46
44
39
42
52
51
8
DET
IC301
HA118717
Main
Conv2
Main
Conv2
NL Emph
SYNC
SEP
C-SYNC
58
60 6269 63 7371
VCD
(-4dB)
C-LPF
C-LPF
(TO u-COM)
System
FBC
ALC
CCD
LPF
L-DET
Main
Emph
C.K
B.E
FM
MOD
f/0DEV
3-22 3-23
6. A/V CIRCUIT DIAGRAM
(FROM/TO DECK)
Video Noise.
H/SW Level is defective..
11
12
R333, C350, C349 are defective.
No Color.
No Color.
L306, C346 are defective.
10
Video output level unstable
C339 is defective.
9
No Color.
R338, C338 are defective.
8
7
6
5
(FROM/TO DECK)
WA VEFORM
Y. (REC)
C. (REC)
AUDIO(PB)
AUDIO(REC)
Y+C (REC)
Y+C (PB)
13
4
1
2
3
(MONO OPTION)
VIDEO Distortion
R330, 322, 325,
C318 are defective.
C/PB
Y/PB
3-253-24
7. SYSTEM BLOCK DIAGRAM
DPG/FG
SLIDER BLOCK
IC501
HD3977
KEY
BOARD(R)
RC501
KEY
BOARD(L)
ENA
CLK
DATA
96
98
99
CST.IN LP
L501
100µH
EP
3-26 3-27
8. SYSTEM CIRCUIT DIAGRAM
DOT MODEL
ONLY
PB, PG will not operate.
VR501 is defective.
•Reset is defect.
•Set dead.
IC504 is defective.
Deck will not operate.
R575, 576, 577, 578
are defective.
WAVEFORM
Auto stop occurs.
RS501, RS502, Q514,
Q515 are defective.
Tape mode not working.
(Taperemaing on reels)
Auto REW not working.
ES501, ES502, LD501 are defective.
OSD is unstable.
C512, C513, C541, C588,
R567 are defective.
µ-COM will not operate.
X501, X502 are
defective.
OSD will not operate.
X503, C517, 518, 519, 576,
R517, 589, L506 are defective.
µ-COM is unstable.
Q501, Q503, L505 are
defective.
3-28 3-29
• WAVEFORMS
9
* IC301 Oscilloscope Waveform
IC301 Pin 14
100mV/10msec DIV
VV/EE
(Main De-Emphasis out)
IC301 44 Pin
100mV/0.2msec DIV
REC/PB
(2fsc)
IC301 Pin 16
100mV/10msec DIV
PB
(Main De-Emphais
Peacking)
IC301 50 Pin
1.0V/20msec DIV
VV/EE
(C-SYNC OUT)
IC301 Pin 18, 21, 23
100mV/10msec DIV
VV/EE
Clamp Drive IN Pin 18
Y-out(to 1H CCD) Pin 21
(
Y-out(from 1H CCD) Pin 23
IC301 52 Pin
500mV/10msecDIV
VV/EE
(VIDEO OUT)
IC301 Pin 31
200mV/10msec DIV
EE
(VIDEO IN)
)
IC301 Pin 54
200mV/20msec DIV
PB
(C.OUT)
* IC501 Oscilloscope Waveform
IC501 Pin 14
1V/5mS
REC/PB modes
(V.H/SW)
IC501 Pin 38
1V/1mS
REC/PB mode
(DFG)
IC501 Pin 27
1V/2mS
QUE/REV modes
(D.V-SYNC)
IC501 Pin 39
1V/10uS
REC/PB modes
(DPG)
IC501 Pin 31
1V/10mS
REC mode
(CTL+)
IC501 Pin 40
1V/1mS
REC/PB modes
(CFG)
IC501 Pin 32
1V/10mS
REC mode
(CTL-)
IC501 Pin 43
100mV/10uS
EE/PB modes
(V-IN)
IC301 Pin 58, 60
200mV/20msec DIV
VV/EE
from 1H CCD Pin 58
()
to 1H CCD Pin 60
IC301 Pin
500mV/2msec DIV
EP REC
(REC RF)
91, 92, 93, 94
IC301 Pin 71
100mV/0.2msec DIV
PB/REC
(3.58MHz X-TAL IN)
IC301 Pin 78
100mV/5msec DIV
PB
(PB RF out)
IC301 Pin 86, 87, 88, 8
500mV/2msec DIV
SP REC
(REC RF)
IC501 Pin 45
500MV/10uS
EE/PB modes
(V-OUT)
IC501 Pin 54
1V/20uS
EE/PB modes
(C-SYNC)
3-30 3-31
• VOLTAGE SHEET
MODE
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
PB REC
IC301
2.5
2.5
0
2.5
0
2.8
2.5
2.5
2.5
2.5
2.5
5
1.6
1.6
2.3
-
1.8
2.1
2.8
2.8
2.1
2.2
2.8
2.1
1.4
2.1
0
2.8
1.9
2.8
-
-
-
-
2.7
5.1
-
5.1
2.7
5.1
PB 5.1
1.7
5.1
2.5
0
1.9
0
0
0
-
-
-
2.8
1.9
2.5
2.5
2.5
2.8
2.5
2.5
2.5
2.5
2.5
2.1
2.1
2.3
2.1
2.8
2.8
2.1
2.4
2.8
2.1
1.4
2.1
2.8
1.9
2.8
2.7
5.1
5.1
2.7
5.1
5.1
1.7
5.1
2.5
1.9
2.8
1.9
MODE
PIN NO.
55
56
57
0
0
5
0
-
0
-
-
-
-
-
0
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
PB REC
2.1
2.8
-
2.8
2.8
2.8
PB 5
-
-
-
2.3
5.0
5
0
2.5
2.5
2.1
2.2
2.1
-
2.1
-
-
2.8
2.1
-
-
1.1
-
-
0
2.1
2.1
2.1
2.1
5.1
2.1
2.1
2.1
2.1
0
5
-
-
-
2.5
2.1
2.8
-
2.8
2.8
2.8
5
-
-
-
-
5.0
5
0
2.5
2.5
2.1
2.2
2.1
2.7
2.1
-
-
2.8
-
-
-
1.1
0
0
2.3
2.3
2.3
2.3
5.1
2.3
2.3
2.3
2.3
1.4
5
-
-
-
2.5
IC501(HD3977)
0
0
0
-
-
-
1
2
3
4
5
6
7
8
H/L
H/L
0
0
0
0
0
0
0
0
0
H/L
H/L
0
0
0
MODE
PIN NO.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
PB REC
3.2
2.2
0.74
4.0
5.28
5.28
5.28
5.24
5.2
5.2
5.18
5.18
0
5.24
H/L
H/L
2.81
2.73
0
0
0
0
2.25
2.25
0
0
2.25
2.25
2.25
Pulse
Pulse
Pulse
5.24
4.99
2.41
1.36
2.43
2.01
1.41
1.32
1.35
2.5
2.43
0.38
5.05
5.21
Pulse
Pulse
Pulse
0
0
0
0
0
0
0
0
0
1.62
2.2
0
2.3
5.28
5.28
5.28
5.28
5.2
0
5.18
5.18
0
5.24
H/L
H/L
2.81
2.73
0
0
0
0
2.99
2.2
0
0
2.25
2.25
2.25
5.24
4.99
2.37
1.36
2.43
0
2.01
1.41
0
1.32
1.35
2.5
2.43
0.38
0
0
5.05
0
0
5.14
0
0
0
MODE
PIN NO.
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
PB REC
0
0
3.34
4.58
0
1.45
0.83
0
2.49
2.47
5.29
0
5.29
2.29
3.14
0
2.8
2.55
5.07
H/L
H/L
H/L
H/L
4.7
H/L
4.87
5.08
5.03
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
IC801
2.3
0
2.3
0
2.4
2.4
2.1
0.3
0
0
0
2.1
2.5
0
0
2.4
0.8
0
0
3.3
4.58
0
1.45
0.83
0
2.47
2.47
5.29
0
5.29
5.29
3.15
4.84
2.8
2.55
5.07
H/L
H/L
H/L
H/L
4.7
H/L
4.87
5.08
5.03
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
2.3
0
2.3
0
2.4
2.4
2.1
0.4
0
0
0
2.1
2.5
0
0
2.4
0.8
MODE
PIN NO.
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
PB REC
2.4
2.4
2
2.1
2
0
2
4.9
2
2.7
0
1.7
1.4
0
2.4
2.4
0.8
2.4
0
1.7
0
0
4.8
0
5.2
2.3
2.3
0
3.3
3
2.2
3.3
3.1
4.8
3.1
5.7
2.3
0
0
5.7
12.6
5.8
0.8
2.4
2.3
2.5
0.5
2.4
2.4
1.9
1.8
1.9
1.9
4.7
1.9
2.7
0.1
4.2
3.5
1.2
2.4
2.4
0.8
2.4
1.6
4.8
5.3
5.3
2.3
3.3
2.2
3.3
4.8
3.1
5.6
2.3
5.6
12.8
5.7
0.8
2.4
2.3
2.5
0.5
Tran-
sistor
Q301
Q302
Q303
Q304
Q305
0
0
0
0
0
0
3
3
0
0
Q306
Q307
Q308
Q309
Q310
Q514
Q515
Q506
Q503
Q502
Q501
Emitter Collector Base
PB REC
5.19
5.15
5.19
3.07
5.32
4.99
REC PBPB REC
0
0
0
0
0
0
0
0
0
0
0.1
5.14
0
4.70
-20.1
-20.0
5.13
0
3.04
0
0
0
0
5.32
4.99
0
0.25
0.25
5.19
5.10
5.14
3.07
1.12
H/L
H/L
0.7
5.25
5.34
4.78
5.18
0
-24.4
0
0
0
0
0
0
4.70
3.05
0
0
H/L
H/L
0.7
5.24
5.34
0
0.25
5.19
4.48
0.71
0.73
2.45
4.43
5.63
0.75
H/L
H/L
0.4
0.43
4.45
0
4.72
4.72
-24.4
-24.2
0
4.72
0
0
0
2.42
5.17
H/L
H/L
0.4
4.43
5.63
0.75
3-32 3-33
PRINTED CIRCUIT BOARD DIAGRAMS CIRCUIT BOARD DIAGRAMS
1. Main P.C.Board
NOTES) Warning
NOTES) Parts that are shaded are critical
NOTES) With respect to risk of fire or
NOTES) electricial shock.
LOCATION GUIDE
3-34 3-35
(Solder Side)
ABBREVIATIONS
ADJ : Adjustment
PG : Pulse Generator
NOTE : Measurement Point
: Adjustment Point
Emitter : TRANSISTOR
Collector
Base
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