JVC KW-AVX900EU Service Manual page 43

4.11.5 Adjustment and check method
(1) Turn ON the main power switch.
(2) Make it a TV tuner mode.
(3) Make frequency same as SSG memory.
Step
Item
No.
DIVER frequency
1
adjustment
2 RF AGC adjustment
(Preadjustment)
3 V-DETECT adjustment
(Preadjustment)
4 RF AGC adjustment
5 V-DETECT adjustment
6 S-DETECT adjustment
7 SD sensitivity adjustment
8 SD detect level check
9 Video frequenct
response check
10 Video level check
11 Audio output level check
12 Distortion check
Fig.1
4MHz: MORE THAN 50 [IRE]
Fig.3
SSG memory ATT Measuring instrument
posision & check point
except EE EE
Frequency counter
31 51 - - -
Wave form monitor
31 51 0dB
CN901 12(VIDEO OUT)
30 50 20dB Wave form monitor
CN901 12(VIDEO OUT)
31 51 0dB Wave form monitor
CN901 12(VIDEO OUT)
30 50 20dB Wave form monitor
CN901 12(VIDEO OUT)
33 53 20dB Digital multimeter
34 54 70dB Oscilloscope
CN901 7(SD OUT)
34 54 90dB Oscilloscope
CN901 7(SD OUT)
30 50 20dB Wave form monitor
CN901 12(VIDEO OUT)
31 51 20dB Wave form monitor
CN901 12(VIDEO OUT)
31 51 20dB Oscilloscope
CN901 8(AUDIO OUT)
31 51 20dB Oscilloscope
CN901 8(AUDIO OUT)
ADJUST TO MOST SHARP
WAVE POINT.
ADJUST TO SAG
MINIMUM POINT.
Adjustment Adjustment value
point
VR901 15.625kHz
TP906
VR902 Most sharp wave
& sat at the sync
L909 Most sharp wave
VR902 Most sharp wave
L909 Most sharp wave
L910
TP920
VR904
- - - -
- - - - Check wave form
- - - - video: More than
Sync: More than
- - - -
- - - - Less than 2.5%
Fig.2
Fig.4
Other
& check value
25Hz
Adjustment of wave
form See Fig.1
point
Adjustment of wave
point form See Fig.2
Adjustment of wave
point form See Fig.1
Adjustment of wave
point form See Fig.2
3.20 0.05V
Level change CAUTION:VR904 rotate
point H (5.0V) clockwise.
Adjust at VR dead point
if rotate CCW.
L (0.0V)
See Fig.3
See Fig.4
90 IRE
30 IRE
235~380mV
(60% MOD.)
ADJUST TO MOST SHARP
WAVE POINT.
ADJUST TO SAG
MINIMUM POINT.
MORE THAN
90 [IRE]
MORE THAN
30 [IRE]
(No.MA341)1-43