1.2. Caution for fuse replacement
1.3. Before repair and adjustment
Disconnect AC power, discharge Power Capacitors C611 and C616 through a 10
W
, 1W resistor to ground.
DO NOT SHORT-CIRCUIT DIRECTLY (with a screwdriver blade, for instance), as this may destroy solid state devices.
After repairs are completed, restore power gradually using a variac, to avoid overcurrent.
Current consumption at AC 120V, 60 Hz in NO SIGNAL mode (volume min at CD mode) should be ~ 135mA.
1.4. Protection Circuitry
The protection circuitry may have operated if either of the following conditions are noticed:
·
No sound is heard when the power is turned on.
·
Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are
“shorted”, or if speaker systems with an impedance less than the indicated rated impedance of the amplifier are used.
If this occurs, follow the procedure outlines below:
1. Turn off the power.
2. Determine the cause of the problem and correct it.
3. Turn on the power once again after one minute.
Note :
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.5. Safety Parts Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by
in the Schematic Diagrams & Replacement Parts List. It is essential that these critical parts
should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design
without permission of manufacturer.
Table 1
Reference No.
Part No.
Part Name & Description
Remarks
A2
K2CB2CB00018
AC CORD
[M]
F901
K5D202APA008
FUSE
[M]
IP601
K5G302AA0002
FUSE PROTECTOR
[M]
IP602
K5G251A00008
FUSE PROTECTOR
[M]
JK901
K2AB2B000007
FUSE
[M]
L901
ELF15N035AN
LINE FILTER
[M]
T901
G4C5ABD00006
TRANSFORMER
[M]
5
SC-EN37P
Summary of Contents for SC-EN37P
Page 10: ...6 Accessories Remote Control AC Cord FM AM Antenna I Pod cradle 10 SC EN37P ...
Page 12: ...7 3 Connection 12 SC EN37P ...
Page 30: ...11 1 Check and Repair of CD Servo P C B 30 SC EN37P ...
Page 33: ...12 2 CD Servo P C B 12 3 Motor P C B 12 4 Panel P C B 12 5 Tuner P C B 33 SC EN37P ...
Page 34: ...12 6 Waveform Chart 34 SC EN37P ...
Page 35: ...13 Wiring Connection Diagram 35 SC EN37P ...
Page 36: ...SC EN37P 36 ...
Page 37: ...14 Block Diagram 14 1 CD Servo SC EN37P 37 ...
Page 38: ...14 2 Tuner SC EN37P 38 ...
Page 39: ...14 3 Main 1 2 Transformer Sensor D Port SC EN37P 39 ...
Page 40: ...14 4 Main 2 2 Panel LED Power Switch Tact Switch Switch Motor SC EN37P 40 ...
Page 42: ...42 SC EN37P ...
Page 44: ...16 1 A CD Servo Circuit SC EN37P 44 ...
Page 45: ...16 2 B Tuner Circuit SC EN37P 45 ...
Page 46: ...16 3 C Main Circuit SC EN37P 46 ...
Page 47: ...SC EN37P 47 ...
Page 48: ...SC EN37P 48 ...
Page 49: ...16 4 D Panel Circuit E D Port Circuit SC EN37P 49 ...
Page 50: ...16 5 F LED Circuit G Power Switch Circuit H Tact Switch Circuit I Switch Circuit SC EN37P 50 ...
Page 51: ...16 6 J Motor Circuit K Sensor Circuit L Transformer Circuit SC EN37P 51 ...
Page 52: ...SC EN37P 52 ...
Page 54: ...SC EN37P 54 17 2 C Main P C B ...
Page 58: ...SC EN37P 58 ...
Page 59: ...18 Illustration of ICs Transistors and Diodes 59 SC EN37P ...
Page 61: ...20 Exploded Views 20 1 Cabinet Parts Location SC EN37P 61 ...
Page 62: ...SC EN37P 62 ...
Page 63: ...20 2 Packaging SC EN37P 63 ...
Page 64: ...SC EN37P 64 ...
