Emerson SC319C Quick start guide

CONTROL
HEAD
CL402
AC HEAD ASSEMBLY
MAIN CBA
KEY 1
RF-SW
ST-SENS.
T-REEL
KEY 0
DV-SYNC
C-SYNC C-SYNC
V-ENV
REMOTE
CTL(+)
RESET
ROTA
D-REC-H D-REC-H
REC-SAFETY
A-MUTE
SCL
SDA
A-MUTE
CTL(-)
RF-SW
DV-SYNC
V-ENV
ROTA
END-SENS.
IC201
(SERVO/SYSTEM CONTROL)
14
94
95
9
7
80
34
18
15
10
13
74
33
44
65
72
6
5
RS201
REMOTE
SENSOR
CTL AMP-OUT
97
AL+5V
D203
S-LED
CTL
J116
(DECK ASSEMBLY)
Servo/System Control Block Diagram BLOCK DIAGRAMS
END-SENS. T-REELST-SENS.
Q202 Q206
Q201
Q205
RESET
TIMER+5V
TAPE-SPEED 28
EXT-H/INSEL 29
RENTAL 30
SPL-PLAY
TAPE-SPEED
EXT-H/INSEL
RENTAL
SPL-PLAY
32
REC/EE/PB REC/EE/PB
27
EXT-H/INSEL
SP-MUTE SP-MUTE
12
SW211
REC
SAFETY
TO VIDEO
BLOCK
TO AUDIO
BLOCK
KEY
SWITCH
KEY
SWITCH
SW201 SW205
1-8-1 1-8-2 T7300BLS
SCL
(MEMORY)
SDA
6
5
REC LED 22
REC LED 23
P-DOWN 84
P-ON-H P-DOWN
P-ON-H
31
D204 REC
AL+5V
LD-SW1
I2C-OPEN 45
71
AL+5V
SW212
LD-SW
CS
7
TO POWER
SUPPLY BLOCK
SW206 SW210
SDA
SCL TO CHROMA
/TUNER
BLOCK
SDA
SCL
IC202
WF3
I2C-OPEN
5 5CTL(+)
6 6CTL(-)
M
M
LOADING
MOTOR
CYLINDER ASSEMBLY CAPSTAN MOTOR
SENSOR CBA
(ST-SENSOR)
SENSOR CBA
(END-SENSOR)
DRUM
MOTOR
PG
SENSOR 1C-F/R
2AL+12V
3D/L+12V
4P-ON+5V
5GND
6C-FG
7
C-CONT
8GND
9D-FG
10LD-CONT
11
D-CONT
12D-PG
CN201
C-FG
C-CONT
D-FG
D-PG
C-F/R
90
89
76
87
66
LD-CONT
82
D-CONT77
AL+12V
D/L+12V
P-ON+5V
M
CAPSTAN
MOTOR

R
L
LUMINANCE
SIGNAL PROCESS
MAIN CBA
Video Block Diagram
VIDEO (L) HEAD
VIDEO (R) HEAD
1-8-3 1-8-4 T7300BLV
(DECK ASSEMBLY)
V(L)
V-COM
V(R)
CL401
3
2
1
Q401
JK701
REAR V-IN
J188
V-OUT
V-AGC
TUNER
LINE
R P
R
P
SYNC
SEPA
FBC
Y/C
MIX
CCD 1H
DELAY
R
P
DOC YNR Y/C COMB
CHROMINANCE
SIGNAL PROCESS
IC401
VIDEO/AUDIO
SIGNAL PROCESS 35
REC VIDEO SIGNAL PB VIDEO SIGNAL MODE: SP/REC
13
91
90
89
88
42
38
CHARA
MIX
6dB
AMP
ENV
DET
AGC
AMP
HPF
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
TO CHROMA/
TUNER BLOCK
TO CHROMA/
TUNER BLOCK
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK
CYLINDER ASSEMBLY
RF-SW
RF-SW
93
V-ENV
J190
WF1
J189
PB-C-MONI
BUFFER
D-V SYNC
C-SYNC
TAPE-SPEED SP/LP/EP
ROTA
D-V SYNC
ROTA
34
14
36
16
71
39
59
73
SPL-PLAY
REC/EE/PB
RENTAL
TRICK
REC/EE/PB
RENTAL
42
TU-VIDEO
EXT-V-IN
EXT-H/INSEL
VIDEO
74
45 47 49 44
Q402
BUFFER
WF6
WF5
WF4

Audio Block Diagram
BLOCK DIAGRAM FOR SECTION 2 (DECK MECHANISM)
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
1-8-5
JK702
A-IN
48
26
27
53
IC301
IC401
Mode : SP/REC
T7300BLA1-8-6
BIAS
OSC
Q872
P-ON+5V
P-ON+5V
Q871
Q873
Q874
Q875
(AUDIO PROCESS)
71
IC801 (AMP)
SP 1
SP-GND 2
JK801
EARPHONE JACK
SP801
SPEAKER
CN802
SP-MUTE
FROM PIN 12
OF IC201
TU-AUDIO
FROM/TO
CHROMA/TUNER
BLOCK
J187
A-OUT
AUDIO
HEAD
AC HEAD ASSEMBLY
A-COM
A-PB/REC
CL402
AUDIO
ERASE
HEAD
AE-H
AE-H/FE-H
1
2
FE-H
FE-H GND
FULL
ERASE
HEAD
CL403
4
3
1
FE HEAD UNIT
LIMITER
SERIAL
I/F
FM DET AF
AMP
SDA
SCL
CN287
4
3A-COM
A-PB/REC
1
2
AE-H
AE-H/FE-H
FROM/TO
SERVO/SYSTEM
CONTROL BLOCK LINE/PB
TUNER
ATT
Q302
BUFFER

REC
AMP
7 98
6
AUTO
BIAS
99
LINE
AMP MUTE 96
P
R
ALC
76
80
TUNER
LINE
71
12
D-REC-H
D-REC-H
A-MUTE
EXT-H/INSEL TO SERVO/
SYSTEM
CONTROL
BLOCK
4
11
WF8
OUTPUT
AMP
WF9
WF7
51
54
3
1
EQ
AMP
100
SP/LP-ON
2
MUTE
5
2

T7300BLC1-8-7 1-8-8
X301
3.58MHz
CL504
4.5MHz
TRAP
CF302
4.5MHz
BPF
CF301
SAW
FILTER
SF001
IC301 VIDEO/AUDIO/CHROMA/DEFLECTION/IF
TU001
IF
AGC
J191
RF AGC-OUT
SDA
SCL
FSC
1
11
5
4
8
IC201
(SYSTEM CONTROL/OSD)
V-SYNC
H-SYNC
OSD-R
OSD-G
OSD-B
59
58
60
62
63
64
OSD-BLK
TU AUDIO TO AUDIO BLOCK
TU VIDEO TO VIDEO BLOCK
EXT V-IN
FROM
VIDEO BLOCK
VIDEO
TO
CRT/H.V. BLOCK
CL504A
FROM/TO
CRT/H.V. BLOCK
BLUE4
GREEN3
RED
AFC
H-DRIVE
ACL
V-RAMP-NF
V-DRIVE
Chroma/Tuner Block Diagram
SDA
SCL
TO SERVO/SYSTEM
CONTROL BLOCK
Q301
BUFFER
REC VIDEO SIGNAL PB VIDEO SIGNAL Mode : SP/REC
REC-AUDIO SIGNAL
WF18
WF17
WF10
WF11
J233
B-OUT
CN303(NO CONNECTION)
CN303 is used for
adjustment at factory
INT.MONITOR 1
2
SDA 4
SCL 5
I2C-OPEN
I2C-OPEN
56
CV-IN
2
MAIN CBA
34
6
5
19
20
43
24
21
22
23
27
63
64
59
26
14
33
15
16
10
11
31
18
38
41
58
WF2
CHROMA
TRAP
SERIAL
I/F
INTELLIGENT
MONITORING
CHROMA
BPF
IF SIGNAL
CONTROL
CIRCUIT
SYNC
SEPARATION
LUMA
SIGNAL
PROCESS
CIRCUIT
CHROMA
SIGNAL
PROCESS
CIRCUIT
H-SYNC
PROCESS
CIRCUIT
V-SYNC
PROCESS
CIRCUIT
OSD MIX/RBG MATRIX/
BLANKING
TUNER
LINE
TUNER
LINE
CLOCK
CONTROL
CIRCUIT

PUMP
UP
AMP
THERMAL
PROTECTION
3
6
7
15
V-DRIVE
H-DRIVE
8
10
7
9
6
GREEN AMP
BLUE AMP
Q501 Q502
Q503
H.DRIVE
Q572
Q571 T572
T7300BLCRT
AFC
ACL
CRT/H.V. Block Diagram
V-
DRIVE
H-
DRIVE
L551
DEFLECTION-YOKE
IC551 (V-DEFLECTION CONTROL)
T571 F.B.T.
ANODE
FOCUS
SCREEN
MAIN CBA
CRT CBA
R
G
B
HEATER
ANODE
GND
V501
CRT
GND
FOCUS
SCREEN
JK501
HEATER 33
CN501
CL501ACL501
REC VIDEO SIGNAL PB VIDEO SIGNAL
CN571
P-ON+180V 11
FROM/TO
CHROMA/TUNER BLOCK
11
S
F
HV
FOCUS VR
SCREEN VR
FROM
CHROMA/TUNER
BLOCK CL504


1-8-101-8-9
+B
FROM
POWER SUPPLY BLOCK
4
3
2RED
GREEN
BLUE
DEF+B
H.OUTPUT
V-RAMP-NF
1
5
3
4
5
4
3
1
WF12
WF15WF14
WF16
WF13
RED AMP


Mode : SP/REC
CL504A
2
VCC

Power Supply Block Diagram
5
4
2
1
16
15
14
13
12
11
LINE
FILTER
BRIDGE
RECTIFIER
T601
IC601
ERROR
VOLTAGE DET
W601
F601
4A/125V L601 D603 - D606
T7300BLP
SWITCHING
Q604 VR601
DEGAUSSING
COIL
CN601
Q601
+B ADJ.
FEED
BACK
LIMITER
Q602
PS601
4 1
3 2
HOT COLD
1-8-12
1-8-11
Q606
Q605
Q607
DG601
AL+33V
P-ON+5V
MAIN CBA
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
4A/125V
TIMER+5V
P-DOWN
(TO PIN84 OF IC201)
P-ON-ON
P-ON+5V
P-ON+5V
P-ON+8V
AL+12V
AL+12V
AL+5V
P-SAFETY2
(TO PIN3 OF IC201)
P-ON-H
(FROM PIN31 OF IC201)
+5V REG.
+5V REG.
+5V REG.
+5V REG.
+8V REG.
IC602
Q608
Q611
Q610
Q609
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE-REPLACE FUSE AS MARKED.
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
4A/125V
Q612
+5.7V
REGULATOR
IC301
4449
+B
DEF+B
HOT CIRCUIT. BE CAREFUL.

A1
A2
A3
A4
A5
B1
B2
B3
B4
B5
C1
C2
C3
C4
C5
D1
D2
D3
D4
D5
E1
E2
E3
E4
E5
F1
F2
F3
F4
F5
G1
G2
G3
G4
G5
1-9-3 1-9-4 1-9-5 T7300SCM1
Main 1/4 Schematic Diagram
MAIN 1/4
Ref No. Position
IC201 D-3
IC202 F-4
Q205 C-1
Q206 F-4
J116 D-5
CL201 G-2
CONNECTORS
TEST POINTS
ICS
TRANSISTORS

H1
H2
H3
H4
I1
I2
I3
I4
J1
J2
J3
J4
K1
K2
K3
K4
L1
L2
L3
L4
H5 I5 J5 K5 L5
M1
M3
M4
M5
N1
N2
N3
N4
N5
M2
PB Audio Signal
PB Video Signal
REC Audio Signal
REC Video Signal
1-9-6 1-9-7 1-9-8 T7300SCM2
Main 2/4 Schematic Diagram
MAIN 2/4
Ref No. Position
IC401 I-2
IC801 M-4
Q401 K-2
Q402 L-4
Q491 L-2
Q871 I-2
Q872 I-2
Q873 I-1
Q874 I-1
Q875 I-1
J187 H-3
J188 L-2
J189 J-4
J190 J-2
CL401 H-4
CL402 H-1
CL403 H-1
CN802 N-4
TEST POINTS
CONNECTORS
ICS
TRANSISTORS

O1
O2
O3
O4
P1
P2
P3
P4
Q1
Q2
Q3
Q4
R1
R2
R3
R4
S1
S2
S3
S4
O5 P5 Q5 R5 S5
T1
T3
T4
T5
U1
U2
U3
U4
U5
T2
PB Audio Signal
PB Video Signal
REC Audio Signal
REC Video Signal
1-9-9 1-9-10 1-9-11 T7300SCM3
Main 3/4 Schematic Diagram
MAIN 3/4
Ref No. Position
IC301 R-2
Q301 R-5
Q302 Q-3
J191 Q-3
J233 T-2
J234 T-2
J239 T-2
J262 T-1
J264 T-1
CN303 U-5
CONNECTORS
ICS
TRANSISTORS
TEST POINTS

V1
V2
V3
V4
W1
W2
W3
W4
X1
X2
X3
X4
Y1
Y2
Y3
Y4
Z1
Z2
Z3
Z4
V5 W5 X5 Y5 Z5 AA5
AA4
AA3
AA2
AA1
BB5
BB4
BB3
BB2
BB1
PB Video SignalREC Video Signal
1-9-12 1-9-13 1-9-14 T7300SCM4
Main 4/4 Schematic Diagram
NOTE :
THE VOLTAGE FOR PARTS IN HOT CIRCUIT IS MEASURED USING
HOT GND AS A COMMON TERMINAL.
CAUTION !
Fixed voltage power supply circuit is used in this unit.
If Main Fuse (F601) is blown, check to see that all components in the power supply
circuit are not defective before you connect the AC plug to the AC power supply.
Otherwise it may cause some components in the power supply circuit to fail.
CRT
Ref No. Position
Q501 AA-5
Q502 AA-4
Q503 AA-4
CL501A Z-5
CL504A Z-5
CN501 BB-4
CONNECTORS
TRANSISTORS
MAIN 4/4
Ref No. Position
IC551 V-5
IC601 Z-2
IC602 X-3
Q571 X-5
Q572 X-5
Q591 X-4
Q601 AA-2
Q602 AA-2
Q604 Z-2
Q605 Y-2
Q606 Y-3
Q607 X-2
Q608 W-2
Q609 X-2
Q610 X-2
Q611 W-1
Q612 W-2
J551 Y-4
J552 Y-4
CL501 Z-5
CL504 Z-5
CN571 W-5
CN601 BB-2
VR601 Z-2
ADJUSTMENT
CONNECTORS
TEST POINTS
ICS
TRANSISTORS
VOLTAGE CHART (Power off mode)
Ref. No. S D G
Q601 0.0 137.0 1.8
Ref. No. E C B
Q602 0 3.2 0.5
Q605 0 7.0 0
Q606 7.0 7.0 7.0
Q608 5.0 7.5 5.7
Q609 6.0 6.5 6.6
Q610 0.7 4.7 1.3
Q611 0 2.4 0
Q612 5.3 5.3 0.8
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE FUSE.
ATTENTION : POUR UNE PROTECTION CONTINUE LES RISQES
D'INCELE N'UTILISER QUE DES FUSIBLE DE MEMO TYPE.
RISK OF FIRE-REPLACE FUSE AS MARKED.
"This symbol means fast operating fuse."
"Ce symbole reprèsente un fusible à fusion rapide."
4A/125V

Z11WF1-10-1 1-10-2
WAVEFORMS
WF2 MAIN 2/4 SCHEMATIC DIAGRAM
IC401 PIN 61
WF1 MAIN 2/4 SCHEMATIC DIAGRAM
J190 RF-SW
Upper: WF6 Lower: WF1
MAIN 2/4 SCHEMATIC DIAGRAM
J189 PB-C-MONI
WF5 MAIN 2/4 SCHEMATIC DIAGRAM
J188 V-OUT
WF4 MAIN 2/4 SCHEMATIC DIAGRAM
IC401 PIN 42
WF9 MAIN 2/4 SCHEMATIC DIAGRAM
IC401 PIN 7
WF8 MAIN 2/4 SCHEMATIC DIAGRAM
J187 A-OUT
WF3 MAIN 1/4 SCHEMATIC DIAGRAM
J116 CTL WF7 MAIN 3/4 SCHEMATIC DIAGRAM
IC301 PIN 48 WF11 MAIN 3/4 SCHEMATIC DIAGRAM
IC301 PIN 11
WF10 MAIN 3/4 SCHEMATIC DIAGRAM
IC301 PIN 20
WF13 MAIN 4/4 SCHEMATIC DIAGRAM
CN571 PIN 5
WF15 CRT SCHEMATIC DIAGRAM
Q502 COLLECTOR
WF16 CRT SCHEMATIC DIAGRAM
Q503 COLLECTOR
WF12 MAIN 4/4 SCHEMATIC DIAGRAM
Q571 COLLECTOR
WF14 CRT SCHEMATIC DIAGRAM
Q501 COLLECTOR
0.2 V 0.1 µs
2 V 5 ms
0.2 V 5 V 5 ms
0.5 V 20 µs
0.25 V 20 µs
0.5 V
0.5 V 0.5 ms
1 V 10 ms
0.2 V 0.5 ms
0.5 ms
1 V 20 µs
2 V 5 ms
20 µs200 V
10 V 5 ms
20 V 20 µs
20 V 20 µs
20 V 20 µs
WF17 MAIN 1/4 SCHEMATIC DIAGRAM
IC201 PIN 58
1 V
WF18 MAIN 1/4 SCHEMATIC DIAGRAM
IC201 PIN 59
1 V 5 ms
20 µs
WAVEFORM NOTES
INPUT: NTSC COLOR BAR SIGNAL
OTHER CONTROLS: CENTER POSITION
VOLTAGES SHOWN ARE RANGE OF
OSCILLOSCOPE SETTING

FULL ERASE HEAD
WIRING DIAGRAM FOR SECTION 2
(DECK MECHANISM)
WIRING DIAGRAM
3
2
1
HEATER
CRT CBA
BT5300F01012
FOCUS
SCREEN
GND
D.Y.
HD
VD
CL403
CL501A
MAIN CBA
BT5300F01012
HEATER
GND
1 2 3
CL501B
CL504
CN501
1
2
CN601
W601
T571
FBT
CRT
BLUE
GREEN
RED
GND
4
3
2
1
1
2
3
4
5
CN571
1
3
CL504B
BULE
GREEN
RED
GND
ANODE
4
2
FE HEAD
SP801
SPEAKER
CN802
CL802
1-11-1 T7300WI1-11-2
CN303
SCL
GND
SDA
INT.MONITOR
I2C-OPEN
1
2
3
4
5
SP1
SP-GND
2
CN287
AUDIO HEAD
CONTROL HEAD
AC HEAD ASSEMBLY
AUDIO ERASE
HEAD
4
3
6
5
2
1
FE-H 1
FE-H GND 2
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2
CTL(-) 6
CTL(+) 5
(NO CONNECTION)
CN303 IS USED FOR
ADJUSTMENT AT
FACTORY
P-ON+180V
P-ON+180V
GND
MLOADING
MOTOR
CYLINDER ASSEMBLY
V(R) 1
V-COM 2
3
V(L)
AL+12V
1
C-F/R
2
AL+5V
3
D/L+12V
4
GND 5
C-FG 6
C-CONT 7
GND 8
D-FG 9
LD-CONT 10
D-CONT 11
D-PG 12
CL201
CL401
CAPSTAN MOTOR
VIDEO
(R)
HEAD
VIDEO
(L)
HEAD
MDRUM
MOTOR
PG
SENSOR
CL402