Adjustment ProceduresGV 29 EURO, GV 9300 EURO
GBAdjustment Procedures
1. Chassis Board
View of Solder Side
J1100J1099
TP101
IC301
C3016
(Parts side)
Test equipment / aids: Two-channel oscilloscope with 10:1 probes, voltmeter, colour generator, test cassette, branded video cassette
Service works on replacement of �
� the tape drum:Adjustment No. 1, 2
� IC304: Adjustment No. 1, 2
AdjustmentPreparation Adjustment Procedure
1. HeadwheelOscilloscope:YAutomatic adjustment: The adjustment process is
Position Indicator� Channel 1 (trigger): .............................................indicated on the display. The meter counts from "P:J10990:01"
� Channel 2: .................................to maximum "P: Euro-AV1-(19) socket2:55". The meter will stop at the set value.
Play test cassette.The value can then be adjusted manually.
When the playback picture appears touch the K buttonYManual adjustment: Use the buttons ? or * to set the
three times immediately. The automatic adjustment modehead switching pulse to 6.5 ?0.5 lines before the vertical
will start.sync pulses.
Channel 2:
1V/div 50?s/div
Video output
6.5 ?0.5H(lines)V-sync
Channel 1:
2V/div 50?s/div
Head switching pulse
Press button u to leave the test mode. The indication
"P:� : �" appears for a short time on the display.
2. Still PictureFeed a CCVS signal into the EURO-AV1 socket andWith buttons C / D set the still picture according to your
Optimisationrecord it in Standard play mode.best personal impression.
Play back this recording and press button î .
k 3 - 2GRUNDIG Service |
ACEC
GRUNDIG
