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Adjustment - JVC KD-AVX20E Service Manual

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4.1
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Digital tester
(3) Test Disc
(4) Extension cable : EXTAV70X-50PF
EXTGS004-26PL
EXTSH002-22P
(5) Extension studs : STDV001-3P
4.2
Standard measuring conditions
Power supply voltage DC14.4V(10.5 to 16V)
Load impedance 20K ohm (2 Speakers connection)
Output Level Line out 2.5V (Vol. MAX)
4.5
How to connect the extension cable for adjusting
Caution:
Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power.
If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat.
CN901
C802
IC801
C801
C902
R901
R903
R904
R902
R858
16
C982
C174
R857
D984
1
C274
C966
9
C803
C850
PP1
C845
8
D901
R859
C852
C182
C380
C172
C374
C272
R273
C282
R283
CN861
C381
R183
R173
C379
C185
2
C175
R181
R171
R179
R271
R169
R269
Q374
R279
R8085
R8234
R8084
TH721
R374
Q8098
D8069
Q371
Q372
Q373
R8103
D372
D8067
C8005
C9102
R8107
C376
Q8092
C8031
D8063
D8068
R8017
R8029
F806
C8026
Q8042
Q8095
C8044
R8010
Q8094
R8011
C8042
Q8096
R8041
C8082
Q8041
C8043
IC803
A
Q8043
R8214
R8061
C8062
Q8011
C8012
C8063
C8013
Q8013
Q8012
D8011
R8055
R8058
C8030
R8039
C8014
L8051
R8217
F801
D8051
C8058
IC804
D8021
F803
C8025
C8024
R8016
R8025
L8021
RA801
R8078
R8077
R8021
C8045
D8041
R8108
R8062
D8062
A
D8061
UL
MARK
C831
PbF
EXTGS004-26PL
EXTSH002-22P

ADJUSTMENT

5
1
10
CN922
1
CN871
IC912
1
LVA10850
R986
C811
R163
R263
C115
PP5
R115
R116
C215
CN923
R215
R216
R343
PP3
2
1
C113
C7
R113
C223
C123
Q351
R119
IC332
R302
R305
R303
R353
R329
R356
C355
R35
IC351
R213
C213
PP4
C8016
R8036
R8035
R8019
IC321
C356
C8015
C222
R8018
R358
R9996
C844
C325
C122
Q863
Q864
C121
R9
C37
Q843
C847
C38
C36
C849
Q844
C721
R852
R856
D845
C846
IC941
Q8006
D844
C848
1
5
CN931
R944
R846
D922
R769
D921
RA729
R770
Q955
R337
R331
1
CN881
C944
R766
R774
R932
R911
R775
R773
R796
R972
R973
C732
RA726
R9927
RA725
R8056
IC701
R803
C9906
C8055
R8057
C8056
IC731
R9924
C9927
C731
R784
C715
R9923
C716
D731
R702
R740
R703
C923
R704
R925
X702
IC935
R926
C9905
L841
R937
L842
R735
R730
C925
R741
R734
R737
C921
R742
R732
C702
R962
C713
R961
RA722
RA723
R714
R739
R745
C800
R963
Q701
D961
4
C952
C974
24
2
D972
CN962
D991
1
23
CN891
SECTION 4
4.3
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
4.4
Dummy load
Exclusive dummy load should be used for AM, and FM.
For FM dummy load, there is a loss of 6dB between SSG out-
put and antenna input.
The loss of 6dB need not be considered sincedirect reading of
figures are applied in this working standard.
1
CN860
3
3
S1A
6
4
-A1
W1
C22
L8
L10
R17
L11
C45
C46
L1
L5
C26
C30
C12
C10
C24
C13
C11
C28
C21
R14
C19
C9
C29
C18
R19
R23
R21
R98
R99
X1
D13
C34
C33
C32
2
1
EXTAV70X-50PF
Extension studs
STDV001-3P
(No.MA446<Rev.001>)1-15

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