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Service Document
Exchange Set
Sono Clock 620 LED
ab Seriennummer 059398
from serial number 059398 on
Service
Manual
Sicherheit
Safety
Materialnr./Part No.
720108000000
Dieses Service Dokument ist nur in Datenform verfügbar
This Service Document is only available as data
Änderungen vorbehalten/Subject to alteration
Made by GRUNDIG in Germany • E-BS-SA 0502
http://www.grundig.com
Es gelten die Vorschriften und Sicherheitshinweise
gemäß dem Service Manual "Sicherheit", Material-
S
nummer 720108000000, sowie zusätzlich die eventuell abweichenden, landesspezifischen Vorschriften!
The regulations and safety instructions shall be
valid as provided by the "Safety" Service Manual,
S
part number 720108000000, as well as the
respective national deviations.
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Model : GRUNDIG SC620
Ref. No. : SC620
Date : 21-Jan-00
A) FM Radio section
1) FM IF
INPUT SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
TP3,2 10.7MHz TP5,2 Quiet Point T1,2 Max. o/p symmetrical Vol. at min. position
2) RF VOLTAGE
BAND SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
FM - - TP4,2 87.5MHz L2 1.9 ~ 2 .1V high end 7.5 ~8V
3) FM RF
INPUT SIGNAL OUTPUT SET RADIO ADJUST ADJUST FOR REMARK
TP1,2 90MHz Speaker 90MHz L1 Max. o/p Vol. at max. position
TP1,2 106MHz " " 106MHz TC1 " " " "
4) 75KHZ CRYSTAL
Alignment Information
OUTPUT ADJUST ADJUST FOR REMARK
TP6,7 TC2 75K_ 10HZ
5) 4.332MHZ CRYSTAL
OUTPUT ADJUST ADJUST FOR REMARK
TP8,9 TC3 4.332M_ 10HZ
Note :
1. Use a digital meter to measure each required voltage on above items
2. Use weak signal in RF alignment
3. Radio & LCD board must be connected before alignment
4. Use the frequence counter to measure each required frequency on above items.
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VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (UNITS = VOLTS)
DATE : 21 Jan 00
COMPONENTS : IC'S
IC 1, TA7358AP IC 3, KA2201
AT POWER ON CONDITION AT POWER ON CONDITION
PIN NO. V-OUT (Volts) PIN NO. V-OUT (Volts)
1 0,53 1 0,64
2 1,24 2 0,6
3 5,38 3 0
4 1,23 4 0
5 0 5 6,16
6 5,36 6 11,65
7 4,72 7 11,5
8 5,33 8 6,91
9 5,36
IC 2, LA1260 IC 4, 78L12
AT POWER ON CONDITION AT POWER ON CONDITION
PIN NO. V-OUT (Volts) PIN NO. V-OUT (Volts)
1 1,54 1 18,95
2 1,54 2 0
3 1,54 3 12,15
40
5 4,95
6 4,69 IC 5, BU2614
7 0,65 AT POWER ON CONDITION
8 1,57 PIN NO. V-OUT (Volts)
9 1,45 1 2,64
10 1,54 2 1,82
11 1,41 3 0,06
12 3,4 4 5,01
13 0 5 0,08
14 -2,45 6 0
15 2,41 7 5,32
16 2,28 8 5,32
9 0,01
10 0
11 0
12 2,58
13 5,46
14 5,46
15 0,56
16 0
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VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (UNITS = VOLTS)
DATE : 21 Jan 00
COMPONENTS : IC'S
IC 6, SAA6579T
AT POWER ON CONDITION
PIN NO. V-OUT (Volts)
1 4,58
2 1,8
3 2,29
4 2,28
5 4,58
60
7 2,27
8 2,34
90
10 0
11 0
12 4,57
13 2,29
14 2,32
15 2,29
16 2,29
IC 8, T98F1
AT POWER ON CONDITION (V-OUT = VOLTS)
PIN NO. V-OUT PIN NO. V-OUT PIN NO. V-OUT PIN NO. V-OUT
1 1,49 21 1,51 41 4,99 61 4,99
2 1,49 22 1,51 42 4,99 62 4,99
3 1,51 23 1,51 43 2,15 63 3,64
4 1,51 24 1,51 44 1,6 64 4,7
5 1,49 25 5 45 0,16 65 4,73
6 1,52 26 3,01 46 0 66 4,74
7 1,52 27 2,02 47 0 67 4,75
8 1,5 28 1,01 48 4,99 68 4,82
9 1,49 29 0 49 0 69 1,5
10 1,5 30 0 50 0 70 1,5
11 1,5 31 0 51 0 71 1,51
12 1,48 32 0 52 4,99 72 1,49
13 1,49 33 0 53 0 73 1,5
14 1,51 34 0 54 4,99 74 1,5
15 1,5 35 0 55 1,48 75 1,35
16 1,5 36 0 56 2,54 76 1,5
17 1,51 37 4,99 57 4,99 77 1,5
18 1,5 38 0,05 58 2 78 1,5
19 1,51 39 5 59 2,89 79 1,5
20 1,5 40 5 60 4,99 80 0
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VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (UNITS = VOLTS)
DATE : 21 Jan 00
COMPONENTS : TRANSISTORS
MEASURED CONDITION : AT POWER ON
Q1 9018F Q8 9014C Q19 902H
C 5,32 C 0,55 C 1,05
B 3,41 B 0,5 B 3,37
E 2,7 E 0 E 3,4
Q2 9018F Q9 9014C Q20 9013
C 2,5 C 10,96 C 10,1
B 0,77 B 0,55 B 4,04
E 0 E 0 E 3,4
Q3 9014C Q10 8550 Q21 9014
C 0 C 5,68 C 0,05
B 0 B 11,07 B 0,57
E 0 E 11,7 E 0
Q4 9018F Q12 9013 Q24 9012H
C 0 C 0 C 5,64
B 0 B 0 B 4,91
E 0 E 2,85 E 5,67
Q5 9012H Q13 9014C Q25 A10156R
C 0 C 1,47 C 4,98
B 0,6 B 0,55 B 1,02
E 0 E 0 E 4,99
Q6 8550 Q16 9014C Q26 9014C
C 11,68 C 0,3 C 0
B 10,82 B 0 B 0,07
E 11,72 E 0 E 0
Q7 9014D Q18 9013 Q35 9014C
C 0,1 C 1,05 C 4,99
B 0,7 B 0,35 B 5,24
E 0 E 0 E 4,58
C 5,23
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Q37 9014C
B 0,11
E0
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