Roadstar CDR-4611 DMP Service Manual

Service Manual

- CDR-4611 DMP

Service Manual

- CDR-4611 DMP

R

CDR-4611 DMP

SERVICE MANUAL

CONTENTS

11.

. SSPPEECCIIFFIICCAATTIIOONNSS

2. CD TEST

3. BLOCK DIAGRAM

4. SAFETY CHECK

5. CD PLAYER CHECKING PROCEDURE

6. TROUBLE SHOOTING

7. SCHEMATIC DIAGRAM

8. PCB LAYOUT

9. EXPLODE VIEW

10. BILL OF MATERIAL

SPECIFICATIONS

Power source : AC 230V
Load impedance : 4 ohm
Reference output : 50 mW

BAND: AM 1 kHz 30% MOD.

Characteristic Unit Nominal Limit

Frequency
Range

Low
High

kHz
kHz

525
1645

±25

±30
Intermediate Frequency kHz 455 ± 2
20 dB S/N
Sensitivity

1000 kHz 600
kHz
1400 kHz

dB/M
dB/M
dB/M

61
60
61

65

66

65
S/N at 5 mV/m Input

600 kHz
1000 kHz
1400 kHz

dB
dB
dB

45
45
45

40

40

40
Selectivity ± 10 kHz dB 35 ± 20

BAND: FM 1 kHz 22.5 kHz DEV.

Characteristic Unit Nominal Limit

Frequency
Range

Low
High

MHz
MHz

87.5

108.5

±0.5

±0.5
Intermediate Frequency MHz 10.7 ± 0.1
30 dB S/N
Sensitivity

90 MHz
98 MHz
106 MHz

dB/M
dB/M
dB/M

18
18
18

23

23

23
S/N at 1MV
Input 22.5 kHz
Deviation

90 MHz
98 MHz
106 MHz

dB
dB
dB

45
45
45

40

40

40

CD

Item Unit Nominal Limit

Frequency Response 100 Hz dB -3 ±3
20kHz dB -3 ±3

S/N W/IEC-A & LPF. dB 50 40
Interruption µm 1000 600
Black Dot µm 800 600
Eccentricity µm 70
Channel Separation (W/Band Pass Filter) dB 35 30

BLOCK DIAGRAM

ANT

IC1
AM/FM
TA2111

FUNCTIONS

TRANSITION

POWER
AMP IC7

TA8227

SPEAKER

L/R

CD SERVO

CD MECH

KEY

LCD

SAFETY CHECKS

Important Note!!! Do the following safety checks after servicing this unit.

1. Remove all the externally connected test equipment and wires before testing the unit.

2. Use the safety test circuit as shown below.

3. Plug the power cord or unit to be tested into the test receptacle.

4. Switch the unit being tested to ON or PLAY.

5. Connect external jack/terminal contact VTVM across a 1k resistor in the test circuit. Set the meter to a
high (150V AC) scale to avoid meter damage and then touch the points with the test probe.

If the meter reading indicates less than 3 volts on all test points, set the meter to a low (3V AC) scale

and repeat the test.

6. Any reading greater than 0.2 volt indicates a potential shock hazard. If this occurs, determine the
cause of the leakage, correct the problem, and repeat the safety test.