GV 27 EURO, GV 7… EURO
Adjustment Procedures
GRUNDIG Service
3 - 3
k
1. +5V, R3379
Adjust voltage to 5.3V
±
0.03V with R3379.
Digital voltmeter: ........................ wire bridge 9038 (5VASW)
GB
Adjustment Procedures
1. Chassis Board (QMB)
1.1 Chassis Board – Power Supply (PS)
Test equipment: Digital Voltmeter
Adjustment
Preparation
Adjustment Procedure
1.2 Chassis Board – Keyboard Control Unit (DC)
Test equipment: Frequency Counter
Adjustment
Preparation
Adjustment Procedure
1. Clock
Observe the instructions for Level 53 (see page 2-5).
Terminate the Service Test Programme (see page 2-4).
Call up the Service Test Programme (see page 2-4).
Call up Level 53 (see page 2-4).
1.3 Chassis Board – Deck Control / Deck Electronic (DE)
Test aids: Test Cassette, branded Video Cassette
Service work after changing the …
… Headwheel: Adjustment no. 1, 3
… IC7890: Adjustment no. 1, 2, 3; Keyboard Control Unit: Adjustment no. 1, Frontend: Adjustment no. 4, 5; Standard Sound: Adjustment no. 2
(only for stereo VCR)
Adjustment
Preparation
Adjustment Procedure
1. Headwheel Position
Indicator
2. VCR Option Code
3. Automatic Contour
Control-ACC(Option)
Observe the instructions for Level 51 (see page 2-5).
Terminate the Service Test Programme (see page 2-4).
Enter VCR option code (see Level 40, see page 2-5).
Terminate the Service Test Programme (see page 2-4).
Observe the instructions for Level 52 (see page 2-5).
Terminate the Service Test Programme (see page 2-4).
Call up the Service Test Programme (see page 2-4).
Call up Level 51 (see page 2-4).
Call up the Service Test Programme (see page 2-4).
Call up Level 40 (see page 2-4).
Call up the Service Test Programme (see page 2-4).
Call up Level 52 (see page 2-4).
SDA
TUNER
&
MODUL.
(TUMOD)
1701
Audout
PAL
Curr.
BIAS R
BIAS
PB-
LEVEL
BIAS-2
HEAD
GNDAL
BIAS-1
SEC-Curr.
HF-AFC
40,4MHz
5VASW
SCL
AFC
PAL-Curr.
5VASW
Lum. Ampl.
check
EURO-AV1 / Scart 1
EURO-AV2 / Scart 2
9007
1962
999
QQP
5603
9034
9154
1930
3606
7300
1944
TAS
7462
FTA
7466
WTR
7464
INIT
1480
7460
SAA1310
7354
MC44603P
3379
+5V
Transformer
5353
SOC1012T
TDA5241
1353
T1,25A
3031
LED
6460
TAE
7461
5001
3618
3160
1915, 1916
11
10
20
C
B
A
1
2
3
5
6
11
17
20
20
2
2
21
21
1
1
1
1
8
5
1
1
1
18
10
1
9
8
5
1
1
4
6
10
1
11 12 13 14 15 16 17 18
1
7
1
1
LC74781
TDA4722
7890
24C08
7110
WTL
7465
7800
1
4
6
5
1
16
32
17
12
24
14
1
8
7
5208
ANTI-
CLOCHE
CLOCHE
5103
ANTI-CLOCHE
40,4MHz
5721
AGC
3742
Band I / PLL
3748
9095
9005
9038
AFC
5725
1720
5100
SEC-Curr.
3159
3007
13
9
18
10
8
18
9
4
4
1
1
1
1
1
7
14
8
16
7
14
8
41
25
65
1
33
24
12
8
16
9
1
1
1
1
11
IN/OUT (IO)
HEAD-AMP.
(HA)
VIDEO SIGNAL
PROCESSING
(VS)
AUDIO-FM
(AF)
DECK ELECTRONIC
(DE)
FOLLOW TV
(FM)
DISPLAY
CONTROL
(DC)
SECAM L
(VS-S)
FRONT-
END
(FV)
STEREO
NICAM (QNIC)
VPS/PDC (VP)
POWER
SUPPLY
(PS)
SWIN (HP1)
1
TRIV
1350
T100mA
9071
9070
1945
1351
T500mA
1352
T500mA
1355
T1A
1356
T1A
STV6400
7507
1710
1711
HEF4053
7513
TDA9604
7850
1
1
1
10
20
11
8
16
9
14
28
15
TDA98xx
7720/7721
HEF4053
7722
TDA9840
7780
LA71520F
7007
LC89980M
7003
LM339
7860
1
20
33
52
41
25
1
65
TMP91C642
7400/7401
TMP87CS71F
7201/7210