JVC KW-AVX800J, Руководство по обслуживанию

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