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Einstellvorschriften / Adjustment Procedures

RR 620 CD / RR 650 CD

2 - 5

GRUNDIG Service

3. Tuner

Measuring instruments: Signal Generator, Sweep Generator, Oscilloscope, Frequncy Counter.
Function switch: Radio
Alignment scheme see page 2 - 3.

Adjustment

Preparations

  Adjustment Process

Adjust T302 to maximum.

At f

u

 (526.5kHz) adjust to maximum with T305.

At f

o

 (1606.5kHz) adjust to maximum with TC4.

Repeat this adjustment.

At 610kHz

 

adjust to maximum with MW antenna coil.

At 1400kHz

 

adjust to maximum with TC3.

Repeat this adjustment.

At f

u

 (148.5kHz) adjust to maximum with T304.

At f

o

 (283.5kHz) adjust to maximum with TC302.

Repeat this adjustment.

At 160kHz

 

adjust to maximum with LW antenna coil.

At 280kHz

 

adjust to maximum with TC301.

Repeat this adjustment.

With T301 and T303 adjust to maximum and symmetry.

At f

u

 (87.5MHz) adjust to maximum with L303.

At f

o

 (108MHz) adjust to maximum with TC1.

Repeat this adjustment.

At 90MHz

 

adjust to maximum with L302.

At 106MHz adjust to maximum with TC2.
Repeat this adjustment.

Set the frequency to 76kHz 

±

 100Hz with VR301.

Couple in a sweep signal of 465kHz to ferrite aerial via a
loop aerial.
Oscilloscope to the headphone socket.
Band switch: MW

Var. capacitor to limit stop: MW f

u

 526.5kHz, f

o

 1606.5kHz

Couple in a standard signal to ferrite aerial via a loop
aerial, (f

mod

 = 1kHz, m = 30%).

Oscilloscope to the headphone socket.
Band switch: MW

MW 610kHz, MW 1400kHz
Couple in a standard signal to ferrite aerial via a loop
aerial, (f

mod

 = 1kHz, m = 30%).

Oscilloscope to the headphone socket.
Band switch: MW

Var. capacitor to limit stop: LW f

u

 148.5kHz, f

o

 283.5kHz

Couple in a standard signal to ferrite aerial via a loop
aerial, (f

mod

 = 1kHz, m = 30%).

Oscilloscope to the headphone socket.
Band switch: LW

LW 160kHz, LW 280kHz
Couple in a standard signal at to ferrite aerial via a loop
aerial, (f

mod

 = 1kHz, m = 30%).

Oscilloscope to the headphone socket.
Band switch: LW

Feed in a 10.7MHz sweep signal to TP3 (FM ant.).
Oscilloscope to TP2 (IC302, Pin9).
Band switch: FM

Var. capacitor to limit stop: FM f

u

 87.5MHz, f

o

 108MHz

Couple in a standard signal to TP3 (FM ant.),
(f

mod

 = 1kHz, 

f = 22.5kHz).

Oscilloscope to the headphone socket.
Band switch: FM

FM 90MHz, FM 106MHz
Couple in the standard signal to TP3 (FM ant.),
(f

mod

 = 1kHz, 

f = 22.5kHz).

Oscilloscope to the headphone socket.
Band switch: FM

Couple in a standard signal of 98MHz, unmodulated to
TP3 (FM ant.).
Frequency counter to TP5.
Band switch: FM

1. AM IF

2. MW Oscillator

3. MW Aerial

bandpass

4. LW Oscillator

5. LW Aerial

bandpass

6. FM IF

7. FM Oscillator

8. FM Aerial

bandpass

9. FM MPX (Stereo)

Summary of Contents for RR 620 CD

Page 1: ...rvice Additionally required Service Manuals for the Complete Service RR 620 CD 75 3119 1051 G DG 6151 RR 650 CD 75 3120 1051 G DG 6251 CD Remote Control 75954 046 34 SERVICE MANUAL RR 620 CD RR 650 CD...

Page 2: ...isassembly Instructions 1 6 Adjustment Procedures 2 3 2 5 Circuit Diagrams and Layout of PCBs 3 1 3 18 Wiring Diagram 3 1 Circuit Diagrams Tuner 3 3 Cassette 3 5 CD 3 7 Control Board 3 11 Tone Control...

Page 3: ...omatic recording level control Automatic button release at tape end CD Section Frequency range 20Hz 20kHz S N ratio weighted 65dB Service Hints Cassette Section Before commencing service work ensure t...

Page 4: ...erscheinen PLAY und die Nummer des laufenden St cks Den Ton mit den Reglern VOLUME UBS und SURROUND SOUND nur RR 650 CD einstellen F r kurzzeitige Unterbrechungen auf PLAY PAUSE 2 dr cken Im Anzeigefe...

Page 5: ...h is in the TAPE position and no buttons are pressed The POWER indicator 6 goes out CD PLAYER Press PLAY PAUSE 2 to start playback The display shows PLAY and the track number Adjust the sound using th...

Page 6: ...be turned counter clockwise first until you notice that the screw has found the first thread Then tighten the screw This preventive measure ensures that no new threads are cut into the plastic materi...

Page 7: ...f the two washers P and Q Fig 6 Fit new flywheel clean capstan in white spirit and reassemble in reverse order 5 Dismantling of Spool Carrier forward wind Fig 6 Remove the drive mechanism see para 2 P...

Page 8: ...ions if necessary 7 CD Laufwerk ausbauen Bei Ausbau der CD Lasereinheit mu vor Abziehen der Steckver bindungen eine Schutzl tstelle n auf der Leiterplatte der Laser einheit angebracht werden um eine Z...

Page 9: ...ortation After fitting the laser unit the soldered short circuit n Fig 13 on the laser connection board must be opened Do not turn the variable resistor laser power adjustment The laser current is pre...

Page 10: ...wankungsmesser an Kopfh rerbuchse Testcassette 449 einlegen 3150Hz abspielen NF Voltmeter an Kopfh rerbuchse Testcassette 449 einlegen 8kHz abspielen Frequenzz hler an TP6 A W Kopf Bespielbare Cassett...

Page 11: ...derholen Bei 90MHz mit L302 auf Maximum einstellen Bei 106MHz mit TC2 auf Maximum einstellen Abgleich wechselseitig wiederholen Mit VR301 76kHz 100Hz einstellen Wobbelsender 465kHz ber Rahmenantenne i...

Page 12: ...Einstellvorschriften Adjustment Procedures RR 620 CD RR 650 CD 2 3 GRUNDIG Service Abgleichlagepl ne Alignment Schemes Cassette TP6 Tuner CD...

Page 13: ...nction Playback Start Connect the wow and flutter meter to the headphone socket Insert test cassette 449 play 3150Hz Connect the AF voltmeter to the headphone socket Insert test cassette 449 play 8kHz...

Page 14: ...et Band switch MW Var capacitor to limit stop MW fu 526 5kHz fo 1606 5kHz Couple in a standard signal to ferrite aerial via a loop aerial fmod 1kHz m 30 Oscilloscope to the headphone socket Band switc...

Page 15: ...N MESSWERTEN HANDELT ES SICH UM N HERUNGSWERTE THE MEASURED VALUES GIVEN IN THE CIRCUIT DIAGRAMS ARE APPROXIMATES to CD Motor Board CASSETTE BOARD BEAT CUT BOARD FM ANTENNA TUNER BOARD CONTROL BOARD L...

Page 16: ...IC U302 TA7343 PIN 1 2 3 4 5 6 7 8 9 V FM 3 5 5 0 6 5 5 6 0 5 8 5 8 3 5 3 5 V AM 3 3 5 0 6 5 4 7 0 5 0 6 4 3 5 3 5 GLEICHSPANNUNGEN GEGEN GND i GEMESSEN DC VOLTAGES MEASURED AGAINST GND i 1 2 3 4 5 6...

Page 17: ...TE STEREO SW Seite page 3 6 CN502 CN501 CN502 Seite page 3 5 CN502 0 1V 0 75V 2 0V 0 5V B E C B C E BA 3313 L ALC INPUT 1 INPUT 2 OUTPUT 1 OUTPUT 2 ALC GND FILTER VCC 1 3 5 7 9 1 1 2 4 6 8 1 0 1 2 NF...

Page 18: ...cuit Diagrams and Layout of PCBs RR 620 CD RR 650 CD GRUNDIG Service GRUNDIG Service 3 7 3 8 CD Seite page 3 9 Seite page 3 9 Seite page 3 11 Seite page 3 13 Seite page 3 9 Seite page 3 15 GLEICHSPANN...

Page 19: ...2 5 N C 7 5 5 0 N C 2 5 3 6 3 6 0 2 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 VOLTAGES IC103 CXD2508Q PIN V PIN V PIN V PIN V N C N C 0 5 2 5 2 4 5 5 2 5 2 5 0 0 2 4 2 5 0 0 65 66 67 68 69 70 71 72 73 74 75...

Page 20: ...3 15 CN208 CN203 CN210 CN210 CN210 Bedienteil Control Board IR SENSOR E C B E C B E C B E C B E C B E C B 5V 4 4V 0V 5V 5V 4 4V 0 1V 5V 5V 5V GLEICHSPANNUNGEN BEI FUNKTION CD STOP GEGEN MASSE GND GEM...

Page 21: ...Druckplattenabbildungen Circuit Diagrams and Layout of PCBs GRUNDIG Service GRUNDIG Service 3 13 3 14 Klangregelung Tone Control Seite page 3 5 Seite page 3 4 Seite page 3 16 Seite page 3 16 Seite pa...

Page 22: ...15 3 16 NF Teil und Stromversorgung AF Part and Power Supply RR 620 CD Alle Bauteile in Block A nicht best ckt J601 J602 geschlossen RR 650 CD Alle Bauteile in Block A best ckt J601 J602 ge ffnet RR 6...

Page 23: ...and Layout of PCBs RR 620 CD RR 650 CD Schaltpl ne und Druckplattenabbildungen Circuit Diagrams and Layout of PCBs GRUNDIG Service GRUNDIG Service 3 17 3 18 Netzteil NF Platte Power Supply AF Board Si...

Page 24: ...72010 751 70 SERVICE MANUAL D GB SERVICE MANUAL D GB BEZEICHNUNG DESCRIPTION SACHNUMMER PART NUMBER POS NR POS NO BEZEICHNUNG DESCRIPTION SACHNUMMER PART NUMBER POS NR POS NO C 609 75954 046 01 ELKO...

Page 25: ...CD Exploded View RR 650 CD 40 38 39 37 31 28 27 29 30 25 24 22 23 21 20 18 17 11 10 8 9 6 7 5 4 3 2 19 26 76 1 99 93 41 43 44 42 45 94 36 35 34 32 33 97 96 98 95 46 47 48 50 51 52 53 54 55 92 56 57 5...

Page 26: ...CHNUMMER PART NUMBER POS NR POS NO C 609 75954 046 01 ELKO 2200 MFD 25V 20 C 615 8452 995 104 ELKO 1000UF 20 16V C 618 8452 995 104 ELKO 1000UF 20 16V C 805 75954 010 28 ELKO 1000UF 25V 20 CF 202 7595...

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