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Grundig K-RCD 500, Руководство по обслуживанию

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GRUNDIG Service

Einstellvorschriften / Adjustment Procedures

K-RCD 500

1 - 12

GRUNDIG Service

Einstellvorschriften / Adjustment Procedures

K-RCD 500

k

Adjustments

1. CD-Section

Measuring instruments/equipment: Oscilloscope, test CD 5A (part no. 72008-376.00)
Note: Do not turn the variable resistor (laser power adjustment). The laser current is pre-set at the factory.

2. Cassette Deck

Measuring instruments/equipment: Frequency counter, AF-voltmeter, wow and flutter meter,
Fe test cassette 449 (part no. 35079-019.00), torque test cassette 456 (part no. 35079-014.00).

Connect the oscilloscope to testpoint TP1, ground to
TP2.
a.) load the test CD
b.) close the CD door
c.) CD function: Play

Connect the oscilloscope to testpoint TP3, ground to
TP2.
a.) load the test CD
b.) close the CD door
c.) CD function: Play

Adjust VR2 to obtain a clear eye pattern as shown
in the diagram.

Adjust VR3 so that the graph is symmetrical to the
0-line (Vref).

1. Focus Offset

2. Tracking

EF Balance

Adjustment

Preparations

  Adjustment Processs

>1V

pp

VOLT/DIV: 0.5V   TIME/DIV: 1ms

max. 1.4V

±

 0.1V pp

0
(Vref)

V1

V2

V1=V2

VOLT/DIV: 20mV   TIME/DIV: 1ms

Connect the frequency counter to the headphone socket.
Insert the test cassette 449,
play 3150Hz.

Insert the torque test cassette 456.
Function: 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.

Connect the frequency counter to TP 

4

 (R/P head).

Insert a recordable cassette.
Function: Record-Start.

Connect the AF-voltmeter via a 1:1000 capacitive voltage
divider to TP 

4

 (R/P head).

Insert a recordable cassette.
Function: Record-Start

With adjustment control (in the cass.-motor) set the
frequency to 3150Hz 

±

0.1%.

Tape tension on:
Playback-Start = 35 - 65g-cm
Fast Forward = 50 - 120g-cm
Fast Rewind = 50 - 120g-cm

Deviation  < 0.25% (aurally compensated). Playback
measuring time 

≥

 30 seconds.

With the head adjustment screw 

1

set the left and right channel to
maximum level.
The levels of the two channels must
not differ by more than 3dB.

The oscillator frequency should be 60kHz 

±

10 kHz.

Adjust with T301.

The bias voltage is approx. 15mV (measured with a
1:1000 capacitive voltage divider).
Adjust with VR301.

1. Tape speed

2. Take-up torque

on Start

3. Wow and flutter

4. Head gap angle

(Azimuth)

5. Bias frequency

6. Bias voltage

Adjustment

Preparations

  Adjustment Process

3. Tuner

Measuring instruments: Standard signal/sweep signal generator, oscilloscope, frequency counter.

1

Adjust T202 to obtain maximum.

At f

u 

(526.5kHz) adjust to maximum with T203.

At f

o 

(1606.5kHz) adjust to maximum with TC4.

Repeat this adjustment.

At 600kHz

 

adjust to maximum with L206.

At 1400kHz

 

adjust to maximum with TC2.

Repeat this adjustment.

With T204 and T201 adjust to maximum.
Repeat this adjustment.

At f

u 

(87.5MHz) adjust to maximum with L204.

At f

o 

(108MHz) adjust to maximum with TC3.

Repeat this adjustment.

At 90MHz

 

adjust to maximum with L203.

At 106MHz

 

adjust to maximum with TC1.

Repeat this adjustment.

Set the frequency to 38kHz 

±

 100Hz with VR201.

Couple in a sweep signal of 465kHz at L206 (ferrite
aerial) via a loop aerial.
Oscilloscope to TP  2  (IC202, Pin17).
Function switch: AM

MW 526.5kHz, MW 1606.5kHz
Couple in a standard signal frequency at L206 (ferrite
aerial) via a loop aerial. (f

mod

 = 1kHz 30%).

Oscilloscope to the headphone socket.

MW 600kHz, MW 1400kHz
Couple in a standard signal frequency at L206 (ferrite
aerial) via a loop aerial. (f

mod

 = 1kHz 30%).

Oscilloscope to the headphone socket.

Feed in a 10.7MHz sweep signal to TP  1  (FM-ant.).
Oscilloscope to output TP  2  (IC202, Pin17).
Function switch: FM

FM 87.5MHz, FM 108MHz
Couple in the standard signal frequency to TP  1  (FM-
ant. f

mod

 = 1kHz, 

∆

f = 22.5kHz).

Oscilloscope to the headphone socket.

FM 90MHz, FM 106MHz
Couple in the standard signal frequency to TP  1  (FM-
ant. f

mod

 = 1kHz, 

∆

f = 22.5kHz).

Oscilloscope to the headphone socket.

Feed in a standard signal of 98MHz, unmodulated to
TP 1  (FM-ant.).
Frequency counter to TP  3  (IC202, Pin13).
Band switch: FM-Stereo

Adjustment

Preparations

  Adjustment Process

1. AM

IF

2. AM (MW)

Oscillator

3. AM (MW)

Aerial bandpass

4. FM

IF

5. FM

Oscillator

6. FM

Aerial bandpass

7. FM

MPX
(Stereo)

4

IC301

SW401-

SW301-

CN301

VR301

T301

TP

CN3

CN4

CN11

IC1

VR2

VR3

J36

R88

R74

TP1

TP2

TP3

1

3

2

L206

VR201

TP

TP

T202

T203

L203

L204

T204

TC1

TC3

TC4

TC2

IC201

IC202

SW201

17

13

1

FM ANT.

T201

Tuner PCB

CD PCB

Audio PCB

Содержание K-RCD 500

Страница 1: ...Unterlagen für den Komplettservice Additionally required Service Manuals for the Complete Service K RCD 500 75 3118 1051 G DG 6051 CD Remote Control 75954 036 11 K RCD 500 2 08 OPER BATT FM STEREO REMOTE SENSOR CONTINUOUS PLAY REPEAT PROGRAM SKIP STOP PLAY PAUSE S T 9 2 LC DISPLAY CD 2 CD 1 STEREO CASSETTE RECORDER OTR PLAY REW F FWD STOP EJECT PAUSE 9 R Q B 0 OPEN OPEN 9 S T 2 REPEAT STOP PLAY PA...

Страница 2: ...PCBs 2 1 2 12 Wiring Diagram 2 1 Circuit Diagrams Tuner Cass AF Section 2 3 CD Section 2 7 Control Section Remote Control 2 9 Layout of the PCBs Tuner Cass AF Section 2 5 CD Section Control Section 2 10 IC Block Diagrams 2 11 Exploded Views and Spare Parts List 3 1 3 7 Exploded Views 3 1 Spare Parts List 3 5 j Inhaltsverzeichnis Seite Allgemeiner Teil 1 3 1 10 Technische Daten 1 3 Servicehinweise ...

Страница 3: ...icehinweise Cassettenteil ÜberprüfenSievorBeginnderService Arbeiten ob die Magnetköpfe die Tonwelle und die Gummiandruckrolle frei von Bandabrieb sind Zum Reinigen dieser Teile verwenden Sie ein mit Spiritus oder Reini gungsbenzin getränktes Wattestäbchen dadurch verbessert sich der Aufnahme und Wiedergabepegel sowie der Bandlauf Nach dem Ersatz von Magnetköpfen oder sonstiger Bauteile müssen die ...

Страница 4: ... have to be loosened they must be resecured in the same manner when the repair is completed Magnetic tools shall not be brought near the magnetic heads Each time repair work has been carried out on the cassette drive mechanism clean the heads the capstan and the rubber pinch roller with spirit or cleaning benzine 1 Gehäuserückteil abnehmen Fig 1 Batteriefachdeckel abnehmen 8 Schrauben A lang und 2...

Страница 5: ...g 5 Fit new flywheel clean capstan in white spirit and reassemble in reverse order 5 Dismantling of Spool Carrier forward wind Fig 5 Remove the drive mechanism see para 2 Push the catch R in the direction of arrow A and take off lever S take care of leg spring T Lift off the spool carrier U forward wind by means of a screw driver S T S T O N A R P Q O U Fig 5 3 Motor ausbauen Fig 3 und 4 Laufwerk ...

Страница 6: ...chalter d und e Fig 10 abschrauben 6 Schrauben f herausdrehen Fig 10 und CD Laufwerkchassis abnehmen 6 Removing the Chassis Fig 2 and 6 Remove the rear panel of the cabinet see para 1 Undo the screw D and remove the record switching lever E Fig 2 Undo 2 screws V Press the top of the cabinet upwards at the positions W and X Remove the chassis towards the rear Disconnect the plug in connections if n...

Страница 7: ... necessary When refitting the sledge of the drive mechanism note the marked position h 1 9 Removing the CD Mechanism Remove the chassis of the CD drive mechanism see para 7 Undo 4 screws j Fig 11 and remove the respective holding brackets Take out the CD drive mechanism with the frame Undo 4 screws k Fig 12 Remove the CD mechanism Take care of the buffers i red and m blue Fig 12 The buffer pressur...

Страница 8: ...evice q carefully in the direction of the arrow 1 Fig 13 Move the guide rail r in the direction of arrow 2 and remove the laser pick up Fig 14 n Laseranschlußplatte Laser PCB Fig 14 r 2 Fig 13 q 1 Fig 16 Achtung beim Einbau einer neuen Lasereinheit Die Laserdiode ist gegen statische Aufladung beim Transport kurz geschlossen Nach dem Einbau und Anschluß der Lasereinheit muß die Kurzschlußlötstelle ...

Страница 9: ...der Kopfeinstellschraube 1 den linken und rechten Kanal auf Pegelmaximum einstellen Der Pegelunterschied von Kanal zu Kanal darf maximal3dB betragen Oszillatorfrequenz 60kHz 10kHz Einstellen mit T301 Die Vormagnetisierungsspannung beträgt ca 15mV gemessen mit einem kapazitiven Spannungsteiler 1 1000 Einstellen mit VR301 1 1 AM ZF 2 AM MW Oszillator 3 AM MW Vorkreis 4 FM ZF 5 FM Oszillator 6 FM Vor...

Страница 10: ... should be 60kHz 10 kHz Adjust with T301 The bias voltage is approx 15mV measured with a 1 1000 capacitive voltage divider Adjust with VR301 1 Tape speed 2 Take up torque on Start 3 Wow and flutter 4 Head gap angle Azimuth 5 Bias frequency 6 Bias voltage Adjustment Preparations Adjustment Process 3 Tuner Measuring instruments Standard signal sweep signal generator oscilloscope frequency counter 1 ...

Страница 11: ...er PCB Bedienplatte Keyboard PCB CD Platte CD PCB Cass Laufwerk Cass Drive Mechanism Audioplatte Audio PCB Netzteilplatte Power Supply PCB L R 2 2 5 6 4 3 4 7 6 2 2 8 8 7 2 3 2 R W BL BL R W BL W A W KOPF R P HEAD K RCD 500 Schaltpläne und Platinenabbildungen Circuit Diagrams and Layout of PCBs Schaltpläne und Platinenabbildungen Circuit Diagrams and Layout of PCBs 2 2 2 1 GRUNDIG Service GRUNDIG ...

Страница 12: ...d Circuit Diagram Audio Tuner ch1 ch2 MUTE COM BA 3308 NF 2 ALC Vcc GND 1 2 3 4 5 6 7 8 9 INPUT 1 INPUT 2 OUTPUT 1 OUTPUT 2 NF 1 RF IN GND IF OUT Vcc RF OUT OSC OSC RF MIX REG OSC BUFFER Vref 1 2 3 4 5 6 7 8 9 LA 1186 GND BAND SWITCH REC SWITCH FUNCTION SWITCH AM FM FM ST CD RAD TAP RECORD PLAY SW301 A F SW401 A E SW201 A B IC202 LA1805 IC201 LA1186N IC301 BA 3308 TP 2 TP 3 TP 1 TP 4 START CASS DE...

Страница 13: ... 2 6 2 5 GRUNDIG Service GRUNDIG Service Leiterplatten PCBs Audio Tuner Netzteil Power Supply Bestückungsseite Component side Netzteilplatte Power Supply PCB Audioplatte Audio PCB Tunerplatte Tuner PCB 1 IC201 IC202 IC301 1 IC 401 Für die tatsächliche Bauteilebestückung ist das Schaltbild maßgebend The circuit diagram is relevant for the actual component assembly ...

Страница 14: ...FNI FPI LDO MDI RFN RFO RFI VREF IC1 TA8191F RF AMP FOCUS TRACKING SLED SPINDLE SERVO AMP 33 32 31 30 29 28 27 26 25 24 23 FABO FMEP FMEN FMEO FMPO PVR DMPO DMEO DMEN DMEP VCC 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 TSN TSO TS1P TS1N TS1O TS2P TS2N TS2O 2VRN 2VRP 2VRO REFP SBAD FEB FEO SEL VEE FSN FSO COSC OSCI GND IC9 UPD6379A RCH LCH BUS0 BUS1 BUS2 BUS3 CCK BUCK SLSW CD...

Страница 15: ...it diagram is relevant for the actual component assembly 1 1 1 6 5 4 3 2 1 1 0 9 8 7 1 7 R114 CD1 LED101 CD2 LED104 5V 5V 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12...

Страница 16: ... CH4 OUTA CH4 OUTB CH4 INA CH4 INB BIAS IN Vcc Vcc CH3 INB CH3 INA CH3 OUTB CH3 OUTA OP IN OP IN CH1 OUTA CH1 OUTB CH1 INA CH1 INB Tr B Vreg OUT MUTE GND CH2 INB CH2 INA CH2 OUTB CH2 OUTA GND OP OUT 20 19 18 17 16 15 21 BA 6398 FB R OUT MAIN DAC SUB DAC SUB DAC MAIN DAC L OUT GND VDD CLK SI LRCK 6 7 5 8 4 3 1 TIMING GENERATOR SHIFT REGISTER LATCH µPD 6379 REF 2 8 7 5 6 Control Logic 4 3 9 2 10 1 F...

Страница 17: ... Ersatzteilliste Exploded Views and Spare Parts List Explosionszeichnungen und Ersatzteilliste Exploded Views and Spare Parts List 3 2 3 1 GRUNDIG Service GRUNDIG Service Explosionszeichnungen und Ersatzteilliste Exploded Views and Spare Parts List ...

Страница 18: ...teilliste Exploded Views and Spare Parts List GRUNDIG Service K RCD 500 3 3 Explosionszeichnungen und Ersatzteilliste Exploded Views and Spare Parts List GRUNDIG Service Cassettenlaufwerk Cassette Drive Mechanism CD Laufwerk CD Drive Mechanism 2 3 ...

Страница 19: ...1 75954 035 27 TUER CD R DOOR CD R 036 000 1 75954 035 28 LINSE TUER CD L LENS DOOR CD L 037 000 1 75954 035 29 LINSE TUER CD R LENS DOOR CD R 038 000 1 75954 035 55 METALLRING METAL RING 039 000 1 75954 035 21 MAGNET MAGNET 040 000 1 75954 035 49 HALTER HOLDER 041 000 1 75954 035 60 ANDRUCKPLATTE PRESSURE PLATE 042 000 1 75954 035 51 FEDER EJEKT TUER CD L SPRING EJECT DOOR CD L 043 000 1 75954 03...

Страница 20: ... SENSOR 053 000 2 75987 544 47 2 MOTOR SCHRAUBE MOTOR SCREV 054 000 2 75954 035 13 MOTOR PULLY MOTOR PULLEY 055 000 2 75954 035 09 HAUPTRIEMEN MAIN DRIVE BELT 056 000 2 75987 544 48 SCHRAUBE SCREW 060 000 2 75987 467 84 AUFNAHMESPERRE RECORD LOCK 062 000 2 75954 035 10 A W KOPF R P HEAD 063 000 2 75954 035 11 LOESCHKOPF ERASE HEAD 064 000 2 75954 035 12 MOTOR EG530AD 2B MOTOR EG530AD 2B 070 000 2 ...

Страница 21: ...BA 6398 FP IC 6 75954 035 66 IC UPD 6379AGR IC 8 S75987 425 97 IC ICPN 10 IC 101 75954 035 68 IC TMP 470820DF NA34 Z IC 201 75987 456 62 IC LA 1186 N IC 202 75987 512 73 IC BA 3308 IC 301 75987 512 73 IC BA 3308 IC 401 75952 500 24 IC TA 8227 P IC 501 S75987 425 97 IC ICPN 10 L 1 75954 035 75 SPULE IND 100UH L 2 75954 035 75 SPULE IND 100UH L 201 75954 035 74 SPULE 4T 4 5MM L 203 75954 035 74 SPUL...

Страница 22: ...w Amstelveste Joan Muyskenweg 22 CJ Amsterdam 00 31 20 5 68 15 68 GRUNDIG ITALIANA S P A Via Brennero 364 Trento 00 39 461 82 20 55 GRUNDIG SVENSKA AB Albygatan 109 d Box 4050 Solna 00 46 8 6 29 85 30 GRUNDIG DANMARK A S Lejrvej 19 Værløse 00 45 42 48 68 22 SF 02271 GRUNDIG NORGE A S Glynitveien 25 Postboks 234 Ski 00 47 64 87 82 00 GRUNDIG BELUX N V Deltapark Unit 3 Weihoek 3 Zaventem 00 32 2 7 1...

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