GV 54…, GV 56 …, SE 5106…
Abgleich / Adjustment Procedures
GRUNDIG Service
3 - 5
Adjustment
Preparation
Adjustment Procedure
+5V, R3078
Adjust voltage to 5.4V
±
0.05V with R3078.
Digital voltmeter: ................................................. MP
1
Playback
GB
Adjustment Procedures
1. Power Supply (OSM / PS)
Test equipment: Digital Voltmeter.
Service work after changing the Power Supply: –
2. Family Board (OFBG)
Service work after changing the Family Board:
– 2.1
Sequence Control (CC) ......................... Adjustment no. 1, 2
– 2.3
IN/OUT (IO) ................................................ Adjustment no. 1
– 2.4.1 FM Sound .................................................. Adjustment no. 1
– 2.4.2 Standard Sound / Audio Linear (AU) ..... Adjustment no. 1, 2
– 4.
Family Board II – Video/Chroma (VS): ...... Adjustment no. 2
2.1 Family Board – Sequence Control (CC)
Test equipment / aids: Digital Voltmeter, Frequency Counter, Test Cassette.
Service work after changing the …
… Family Board:
Adjustment no. 1, 2
… Headwheel:
Adjustment no. 2
4. Family Board II – Video/Chroma (VS): Adjustment no. 2
… IC7225:
Adjustment no. 4
… IC7265:
Adjustment no. 1, 3
… IC7270:
Adjustment no. 1, 2
Adjustment
Preparation
Adjustment Procedure
Call up the Service Function with the remote control:
– Press the "CODE" button.
"
CODE -- -- -- --
" is indicated in the display.
– Enter
4 9 3 7
in this order and confirm with button
G
.
Insert a test cassette.
Call up the Service Function with the remote control:
– Press the "CODE" button.
"
CODE -- -- -- --
" is indicated in the display.
– Enter
4 9 3 4
in this order and confirm with button
G
.
Connect IC7265-(7) via a 10k
Ω
resistor to +5VD.
Connect the frequency counter to IC7265-(7).
Standby operation
Digital voltmeter: ................................................. MP
5
Playback
1. VCR Memory
Initialization
2. Headwheel
Position Indicator
3. Clock, C2265
4. +12VD, R3227
This function erases and initializes the VCR Memory. The
customised station memory is also erased (with the
exception of tape deck parameters).
Service Work after this initialization:
• 2.2
Family Board – Frontend (FE): Adjustment. 4, 5
• 2.4.2 Family Board – Standard Sound: Adjustment no. 2
• 4.
Family Board II – Video/Chroma (VS): Adjustment no. 2
Press numbered button
3
. On the right of the display
"
A3
"appears.
On successful completion of the adjustment the VCR
ejects the test cassette.
Terminate the Service Function by disconnecting the VCR
from the mains.
The period is set with C2265 to 1s
±
4
µ
s in the factory.
Remove the 10k
Ω
resistor.
With R3227 set the voltage to 11.6V
±
0.1V.
