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Adjustment Procedure
Set frequency to 15625 Hz.
Adjustment
Preparation
Operation
Adjust with
mode
:
1. Free running
Frequency counter:
EE mode
frequency
without signal
- Bypass
- Memory
IC 3910-(14)
IC 4130-(14)
Set H-puls to 4,5V. Control burst amplitude (> 8V)
and V-puls amplitude (2V...3V).
B > 8V
. SSC puls
amplitude
- Bypass
Oscilloscope:
Channel A: IC 3840-(24)
Channel B: Plug BS 1-2
Trigger: Channel B (H)
H =4.5V
V=2...3V
<1,1V
Oscilloscope:
Channel A: IC 4040-(24)
Channel B: Plug BS 1-5
Trigger: Channel B (H)
- Memory
20 ps/cm
2. Field
. V-puls width
- Bypass
Oscilloscope:
Channel A:
MP
Channel B: Plug BS 1-2
Trigger: Channel B (V)
Oscilloscope:
Channel A:
MP
Channel B: Plug BS 1-5
Trigger: Channel B (V)
100
ys /cm
- Memory
. PAL adjustment
Connect IC 3840-(28) /
EE mode
Chroma amplitude | IC 4040-(28) to +12 V.
(PAL colour
Oscilloscope:
bar test
;
- Bypass
IC 3840-(15)
signal)
10 ps scm
Maximum
- Memory
Ic 4040-(15)
|
Trigger: Like adjustment 2.
Colour oscillator
Connect IC 3840-(17) /
EE mode
IC 4040-(17) to chassis.
(PAL colour
Frequency counter:
bar test
Bring the colour bars which are running though to a
- Bypass
IC 3840-(15)
signal)
standstill. Afterwards disconnect the connections
- Memory
IC 4040-(15)
from pins 17 to chassis and from pins 28 to +12V.
(B-Y) signal
EE mode
Oscilloscope:
(PAL colour
- Bypass
IC 3840-(3)
bar test
L 3849
- Memory
IC 4040-(3)
signal)
L 4049
Trigger: Like adjustment 2.
Incorrect
Correct
alternately
EE mode
(Demodulation
test signal)
R 3850
R 4050
Incorrect
Correct
10 ys/cm
EE mode
(SECAM
colour bar test
. SECAM adjust-
ment
Reference circuit
(Red)
Oscilloscope:
signal)
- Bypass
IC 3840-(1)
Comet
- Memory
IC 4040-(1)
Trigger: Like adjustment 2.
Reference circuit
(Blue)
Oscilloscope:
~ Bypass
IC 3840-(3)
- Memory
IC 4040-(3)
Incorrect
Identification
Oscilloscope:
- Bypass
IC 3840-(21)
- Memory
IC 4040-(21)
Set to maximum.
Trigger: Like adjustment 2.
Adjust minimum overshoots.
Oscilloscope:
IC 3840-(3)
IC 4040-(3)
Trigger: Like adjustment 2.
Colour amplitude
~ Bypass
- Memory
167
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