Prescriptions d'alignement / Adjustment Procedures
3 - 4
GRUNDIG Service
GB
Adjustment Procedures
1. Power Supply (OSM…)
Test equipment: Digital Voltmeter.
Service work after changing the Power Supply: –
Adjustment
Preparation
Adjustment Procedure
+5V
Adjust voltage to 5.4V
±
0.03V with R3204.
Digital voltmeter: .............................................. 1901-(17)
2. Family Board (OFB2)
Service work after changing the Family Board:
– 2.1 Deck Control / Deck Electronic (DE) ............ Adjustment no. 1
– 2.3 Video/Chroma (VS) ....................................... Adjustment no. 3
– 2.4 Standard Sound / Audio Linear (AL) ...... Adjustment no. 1.1, 3
7413
7410
7411
7402
5604
7412
1922
1914
1913
1916
1403
24C08
L2722
Fuse 80mA
1400
Fuse 630mA
Fuse 135mA
Erase
Oscillator
Dub.
Oscillator
Sync.
Frequ.
BIAS
Pal-Curr.
Secam-Curr.
AFC
Adj.
TXT Adj.
Band I
AGC Adj.
PB
Lev.
SA 1310
1922
1911
1915
TVC
Video-Controller
LA 7437
OFB-DE
OFB-AL
OFB-VS
OFB-IO
OFB-FV
HEF 4094 BP
1
64
33
1
1
1
1
1
1
1
1
1
1
1
1
1
1
32
7601
7051
1
1
7060
42
1
1
21
22
1919
LA 7282
LC 89973M
TDA9800T
5603
3618
1918
3606
3038
3042
7552
EUROCONNECTOR 1 & 2
1917
OVIO OSIO,OIO
1923
7540
1500
1701
5
1
6
1
1
1
1
15
1
15
1
11
1
21
6
11
17
Trap
Tuner
Modulator
3748
3765
7720
5725
5721
3742
3057
3600
2.1 Family Board – Deck Control / Deck Electronic (DE)
Test aids: Test cassette
Service work after changing the …
… Family Board or Headwheel: Adjustment no. 1
… IC7412:
Adjustment no. 1
2.3 Video/Chroma (VS): Adjustment no. 3
Service Test Programme: Entering the VCR Option Code (para 1.1.3)
Adjustment
Preparation
Adjustment Procedure
1. Headwheel
Position Indicator
Insert a test cassette. The video recorder then switches
automatically to play mode.
Call up the Service Function with the remote control handset:
– Press the button "CODE", enter the code number
4 9 3 4
and press the
G
button.
– Press the button "CODE", enter the code number
4 9 3 6
and press the
G
button.
On successful adjustment the video recorder switches to
stand-by.
If the adjustment has not been carried out successfully the
video recorder ejects the test cassette. Reason: Test
cassette, headwheel or technical defect (eg.
µ
C).
