Roadstar CDR-4611 UDMP User manual

Service Manual - CDR-4611 UDMP
Service Manual - CDR-4611 UDMP
R
CDR-4611 UDMP

SERVICE MANUAL
CONTENTS
1. SPECIFICATIONS
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.

CD PLAYER CHECKING PROCEDURES
A. WAVE E/F BALANCE ADJUSTMENT
1) Test Point : VC, TS10.
2) Test Disc : Sony Test CD Type 3.
3) Test Equipment :
Scope : DC 0.2 V 0.5 ms.
4) Test Mode : Play Sony CD, Type 3, Track 1, Press FF.
(Fast Forward), Adjust VR401 Until A=B (as Figure Bellow).
SCOPE : DC POSITION
A
B
Figure A
B. FOCUS-BIAS ADJUSTMENT
1) Test Point : VC RFO.
2) Test Disc : Sony Test CD, Type 3.
3) Test Equipment :
Scope : DC 0.5 V 0.5 μs.
SCOPE : AC POSITION

TROUBLESHOOTING
Circuit Symptom Cause and Remedy
General No sound •Speakers are not connected:
Check the speaker connection.
•Wrong function is selected:
Set switch to the proper position.
•Defective volume control:
Set the volume control to a proper sound level.
•Defective earphone jack:
Replace the earphone jack.
•Mute function is active:
Release it by remote control.
AM No sound, weak sound
(Low sensitivity) •Improper location of unit:
Rotate or reposition the unit.
•Defect AM antenna coil or oscilloscope coil:
Replace if necessary.
•Intermediate Frequency tuning faulty:
Readjust (see “Alignment and Adjustment”).
•RF tracking faulty:
Readjust (see “Alignment and Adjustment”).
•Defective TA2111
Check voltages. Replace if necessary.
•Poor contact in antenna circuit:
Check resistance and resolder.
FM No sound, weak sound
(Low sensitivity) •FM antenna not connected:
Connect the built-in or external antenna.
•Defective band selector switch:
Replace or repair the switch.
•Defective TA2111:
Check voltages. Replace if necessary.
•Intermediate Frequency tuning faulty:
Readjust (see “Alignment and Adjustment”).
•Poor contact in FM antenna circuit:
Resoled or repair as required.
CD Cannot read the table of
contents,
no display,
no sound.
•Disc is inserted upside down:
Insert disc correctly.
•Disc is dirty:
Wipe clean with a soft cloth.
•Disc is scratched:
Use a new disc.
•Disc is seriously warped:
Use a new disc.
•A non-standard disc has been inserted:
Use only a brand name disc.
•Moisture has formed inside the CD Pick-up Head:
Wait about 20 to 30 minutes.
•Defect in the servo control board:
Replace or repair as required.
•Defect in the pickup mechanism:
Replace as required.

6
5
17
36
35
33
4
3
31
1
28
7
27
9
32
34
42
19
13
18
11
38
39
23
24
40
26
16
15
10
8
21
41
14
2
27
30
22
12
25
43
116 31
17 32
18 33
19 34
20 35
21 36
22 37
23 38
24 39
25 40
26 41
27 42
28 43
29
30
2
3
4
5
6
7
8
9
10
11
12
13
14
15
114
17
12
11
12
16
12
11
11
11
41
114
41
4
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
Front Cabinet AC Socket Shelf 2.6 x 6 P/A Screw
LCD Lens Ring 3 x 8 P/A Screw
Speaker Clips (Kit) 2.6 x 4 K/A Screw
Battery Terminal (Kit) 2.6 x 6 P/A Screw
CD Door Spring 2 x 5 PWA Screw
Speaker Grill (Kit) 1.4 x 2.5 PWA Screw
PVC Brass Shaft Speaker
FM Antenna CD Mechanism
Dial Rope Spring Anti-Shock Rubber
3 x 5 P/M Screw AC Transformer
3 x 10 PWAScrew AC Socket
3 x 10 P/A Screw USB Fixing Shelf
2 x 6 P/A Screw USB Board
3 x 12 P/A Screw
2 x 8 P/A
Back Cabinet
CD Door
LCD Plate
LCD Lens
CD Door Lens
Volume Knob
PVC Knob
Function Knob
PVC Dial Knob
CD Buttons
Antenna Bar Bracket
Dust-Proof Shelf
Mid-Cabinet
Battery Door
EXPLODE VIEW

Description : Am/Fm Radio with CD/MP3 Player
with USB interface
Index Part Name Description Unit Qty. Remarks
1PCB
2
3
4 Elect Cap (SMD) 102 pcs 4 C324 C326 C342 C348
5 103 pcs 7 C49 C51 C52 C315 C319 C321 C352
7 153 pcs 1 C314
8 203 pcs 6 C11 C14 C24 C30 C32 C44
9 222 pcs 1 C347
10 272 pcs 1 C318
11 333 pcs 2 C309 C310
12 472 pcs 1 C306
13 473 pcs 6 C304 C305 C308 C334 C335 C337
14 20P pcs 6 C16 C17 C38 C361 C363 C39
15 3P pcs 1 C311
16 470 pcs 2 C338 C339
17 47P pcs 1 C379
18 500 pcs 2 C249 C250
19 56P pcs 2 C323 C380
20 5P pcs 3 C20 C21 C42
21 100P pcs 2 C22 C329
22 15P pcs 3 C28 C332 C333
23 10P pcs 4 C367 C368 C23 C26
24 30P pcs 4 C25 C33 C34 C36
25 Elect Cap (SMD) 150P pcs 1 C35
26 300P pcs 1 C43
27 502 pcs 2 C48C50
28 Ceramic Cap 203P pcs 5 C2 C 3C4 C5 CA2
29 2P pcs 1 C41A (NPO elect cap)
31 Resistor (SMD 0603) 0R（0603）pcs 7 C29 C31R J3R J6R J8R J20R J24
32 100K pcs 6 R11 R12 R22 R31 R36 R334
C12 C15 C19 C37 C45 C46 C47 C206
C207 C238 C247 C252 C301 C302 C303
C307 C312 C316 C317 C325 C328 C330
C331 C336 C340 C341 C343 C344 C345
C346 C349 C350 C351 C353 C355 C356
C357 C358 C359 C360 C362 C364 C365
C366 C369
pcs 456 104
Bill of Material
RJ1 RJ2 RJ4 RJ5 RJ7 RJ9 RJ10 RJ11
RJ12 RJ13 RJ14 RJ15 RJ16 RJ17 RJ18
RJ19 RJ21RJ22 RJ23 RJ25RJ27 RJ26
RJ28 RJ29 RJ30 RJ31 RJ32 RJ33 RJ34
RJ35 RJ36
31pcs0R(1206)Resistor (SMD 1206)30

Index Part Name Description Unit Qty. Remarks
34 120R pcs 2 R203R208
35 150R pcs 4 R14 R24 R229 R230
36 18K pcs 2 R28 R29
37 15K pcs 4 R5 R315 R386 R387
38 12K pcs 2 R27 R30
39 180K pcs 4 R302 R303 R304 R305
41 1.5K pcs 2 R9 R39
42 1MR pcs 2 R320 R379
43 10R pcs 4 R308 R336 R337 R41
44 220R pcs 4 R16 R313 R356 R25
45 22K pcs 6 R20 R221 R222 R311 R340 R344
46 270R pcs 1 R261
47 27R pcs 4 R384 R385 R211 R215
48 2K pcs 1 R8
49 2.2K pcs 2 R10 R312
50 2.7K pcs 1 R3
51 2M2 pcs 1 R358
52 33K pcs 5 R204 R207 R310 R330 R332
53 Resistor (SMD 0603) 39K pcs 1 R421
54 3.9K pcs 1 R4
55 3.3R pcs 2 R201 R202
56 43K pcs 1 R7
57 470R pcs 1 R32
58 470K pcs 1 R319
59 47K pcs 2 R317 R346
60 4.7K pcs 7 R26 R234 R328 R333 R377 R382 R383
61 56K pcs 4 R223 R224 R225 R226
62 56R pcs 3 R35 R33 R42
63 5.1K pcs 2 R329 R331
64 5.6K pcs 5 R2 R40 R205 R318 R339
65 680R pcs 2 R13R357
66 68K pcs 2 R15R381
67 6.8K pcs 7 R6 R17 R345 R348 R350 R376 R380
68 82K pcs 2 R301 R306
69 8.2K pcs 4 R18 R19 R227 R228
71 Resistor 100R 1/4W pcs 1 R366
72 2.2R 1/4W pcs 1 R1
73 39K 1/16W pcs 1 RA1
74 Elect Cap 1000UF/16V pcs 2 C208C251
75 1UF pcs 7 C214 C221 C223 C226 C228 C233 E326
76 2200UF/25 V pcs 1 C205
9R232 R248 R309 R316 R326 R327 R335
R359 R375
40 1K pcs
R231 R38 R347 R361 R353 R354 R37
R378 R343 R342 R341 R338 R323 R352
R21 R314 R322 R347
18pcs10K
33 15pcs100R
70
R360 R370 R373 R368 R369 R374 R371
R349 R372 R364 R365 R362 R363 R351
R307