Adjustment Procedures; Video/Chroma (Vs) - Grundig GV 500 SV/1 Serviceanleitung

Abgleich / Adjustment Procedures
GB

Adjustment Procedures

1. Power Supply (OSM...)
Test equipment: Digital Voltmeter.
Service work after changing the Power Supply: –
Adjustment
+5V 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
1
HEF 4094 BP
7410
64
TVC
Video-Controller
1
OFB-DE
7411
SA 1310
1
7412
Fuse 630mA
Fuse 80mA
1
24C08
1400
1922 1914
1 1 1
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
1. Headwheel
Insert a test cassette. The video recorder then switches
Position Indicator
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.
3 - 4
Preparation
OVIO OSIO,OIO
11 1 15
1922
33
1
1911
32
1
1
1915
OFB-AL
1919
1
5604
Dub.
Oscillator
7601
7402 5603
LA 7282
1
L2722
Erase
1
Oscillator
Fuse 135mA
1913
3618
1
1403
1916
BIAS
Preparation
Adjust voltage to 5.4V
EUROCONNECTOR 1 & 2
1917
1
21
1
1 15
OFB-IO
1
3042
3038
Secam-Curr.
Pal-Curr.
7051
42
LA 7437
3606
PB Lev.
1
3057
3600
Sync.
1 Frequ.
1918
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. µC).
Adjustment Procedure
±
0.03V with R3204.
7540
1
1923
Modulator
1
1701
Tuner
7552
5 6
11
5725
AFC
Adj.
TDA9800T
OFB-VS
1
7720
22
3765
TXT Adj.
7060
3742
1
21
3748
LC 89973M
AGC Adj.
Band I
Adjustment Procedure
GRUNDIG Service
1500
1
6
17
5721
Trap
1
OFB-FV