JVC AV-2934L-ESK Cirquit Diagram
SCHEMATIC DIAGRAMS
FLAT COLOUR TELEVISION
YA19520049
AV-2934L/ESK
CD-ROM No.SML200410
BASIC CHASSIS
CW
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.YA195
2004/9
AV-2934L
/ESK
STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The components identified by the symbol and shading are
critical for safety. For continued safety replace safety ciritical
components only with manufactures recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
following conditions.
(1)Input signal : Colour bar signal
(2)Setting positions of
each knob/button and
variable resistor
(3)Internal resistance of tester
(4)Oscilloscope sweeping time
(5)Voltage values
Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.
: Original setting position
when shipped
: DC 20kΩ/V
: H
: V
: Othters
: All DC voltage values
20µs / div
5ms / div
Sweeping time is
specified
3.INDICATION OF PARTS SYMBOL [EXAMPLE]
In the PW board
: R209
R209
Type
No indication
MM
PP
MPP
MF
TF
BP
TAN
(3)Coils
No unit
Others
(4)Power Supply
Respective voltage values are indicated
(5)Test point
: Test point
(6)Connecting method
: Ceramic capacitor
: Metalized mylar capacitor
: Polypropylene capacitor
: Metalized polypropylene capacitor
: Metalized film capacitor
: Thin film capacitor
: Bipolar electrolytic capacitor
: Tantalum capacitor
: [µH]
: As specified
: B1
: 9V
: Connector
: Receptacle
: Only test point display
: Wrapping or soldering
: B2 (12V
: 5V
)
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit : [Ω]
K
M
Rated allowable power
No indication : 1/16 [W]
Others : As specified
Type
No indication
OMR
MFR
MPR
UNFR
FR
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
Capacitance value
1 or higher : [pF]
less than 1
Withstand voltage
No indication : DC50[V]
Others : DC withstand voltage [V]
AC indicated
Electrolytic Capacitors
47/50[Example]: Capacitance value [µF]/withstand voltage[V]
: [kΩ]
: [MΩ]
: Carbon resistor
: Oxide metal film resistor
: Metal film resistor
: Metal plate resistor
: Uninflammable resistor
: Fusible resistor
: [µF]
: AC withstand voltage [V]
(7)Ground symbol
: LIVE side ground
: ISOLATED(NEUTRAL) side ground
: EARTH ground
: DIGITAL ground
5.NOTE FOR REPAIRING SERVICE
This model's power circuit is partly different in the GND. The
difference of the GND is shown by the LIVE : ( ) side GND and the
ISOLATED(NEUTRAL) : ( ) side GND. Therefore, care must be
taken for the following points.
(1)Do not touch the LIVE side GND or the LIVE side GND and the
ISOLATED(NEUTRAL) side GND simultaneously. if the above
caution is not respected, an electric shock may be caused.
Therefore, make sure that the power cord is surely removed from
the receptacle when, for example, the chassis is pulled out.
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL
side GND or never measure with a measuring apparatus measure
with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND
and ISOLATED(NEUTRAL) side GND at the same time.
If the above precaution is not respected, a fuse or any parts will be broken.
Since the circuit diagram is a standard one, the circuit and
circuit constants may be subject to change for improvement
without any notice.
NOTE
Due improvement in performance, some part numbers show
in the circuit diagram may not agree with those indicated in
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.
)
(No.YA195)2-1
CONTENTS
SEMICONDUCTOR SHAPES .................................................................................................................................... 2-2
USING P.W.BOARD ........................................................................................................................................................2-2
BLOCK DIAGRAM ............................................................................................................................................................ 2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM(1/2) ................................................................................................................................2-5
MAIN PWB CIRCUIT DIAGRAM(2/2) ................................................................................................................................2-7
CRT SOCKET PWB CIRCUIT DIAGRAM .........................................................................................................................2-9
FRONT CONTROL PWB CIRCUIT DIAGRAM .............................................................................................................. 2-11
PATTERN DIAGRAMS
MAIN PWB PATTERN ...................................................................................................................................................... 2-13
CRT SOCKER PWB PATTERN ....................................................................................................................................... 2-15
FRONT CONTROL PWB PATTERN ............................................................................................................................... 2-16
VOLTAGE CHART ......................................................................................................................................................... 2-17
WAVEFORMS ................................................................................................................................................................... 2-18
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM VIEW FRONT VIEW TOP VIEW
CHIP TR
E
C
B
ECB
B
(G)E(S)C(D)
ECB
ECB
C
BE
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
OUT
E
IN
IN OUTE
1 N
1 N
CHIP IC
TOP VIEW
1
N
1
N
USING P.W. BOARD
P.W. BOARD ASS’Y NAME AV-2934L/ESK
MAIN P.W. BOARD SCW-1072A-H2
CRT SOCKET P.W. BOARD SCW-3015A-H2
FRONT CONTROL P.W. BOARD SCW-8002A-H2
1
N
2-2(No.YA195)
BLOCK DIAGRAM
VIDEO-1
S_VIDEO
INPUT
VIDEO-2
COMPONENT
VIDEO
INPUT
OUTPUT
VIDEO-3
INPUT
(FRONT)
AC IN
J801
S-VIDEO
J802
J803
J804
VIDEO
J802
VIDEO
J803
AUDIO-L
J804
AUDIO-R
CB
CR
MAIN PWB
IC701 MAIN MICRO COMPUTER
IF㨯VIDEO㨯RGB㨯SYNC㨯DEF. PROCESS
108,109
SCL
SDA
TU001
TUNER
SW1
Y1
C1
CVBS1
V
L1
L
R1
R
V2/Y
Y
PB
PR
L2
L
R2
R
V-OUT
L-OUT
L
R-OUT
R
V3
L3
R3
TV/VIDEO
VOL+
IF
REMOCON
RECEIVER
VOL- CH+ CH- MENU
S901
POWER SW
F901
IC702
MAIN MEMORY
SF101
SAW FILTER
SF102
SAW FILTER
POWER
LED
127,128
3, 6
IC481
ROTATION
FRONT CONTROL PWB (1/2)
111
98,99
119
122
29, 30
24, 25
97
79
80
78
55
58
59
51
49
50
56
57
34
35
48
36
37
SCL1, SDA1
SCL0, SDA0
ROTATION
LED
REMOTE
KEY_IN
SV_DET
SIF IN
IF IN
Y
PB
PR
V2
Y/V1
C1
V3
L1
R1
L2
R2
L3
R3
VOUT
LOUT
ROUT
ROTATION
2, 8
SIF DETECT
VIF DETECT/AGC/AFT
SOUND TRAP
VIDEO
SELECT
AUDIO
SELECT
COIL
I2C
BUS
I/O
PORT
MICRO
COMPUTER
VIDEO
C
IDENT.
Y
COMB FILTER
Y DELAY ADJ.
AUDIO
SELECT
COLOUR
DEMOD
AUDIO
CONTROL
D901
RECT
IC921
POWER
REG
DIGITAL SIGNAL PROCESS
PEAKING SCAN
VELOCITY MOD.
U/V DELAY
SKIN TONE
U/V TINT
SATURATION
B-Y R-Y
BASE-BAND
DELAY LINE
SYNC
SEP.
OUT_L
OUT_R
T921
SW
TRANSF.
PC901
VOLTAGE
FEEDBACK
60
61
RRGGB
B
RGB MATRIX
&
GAMMA
V. DRIVE
PARABOLA GENERATE
H. DRIVE
1.8V REG
1.8V REG
IC972
3.3V REG
IC975
5V REG
IC973
12V REG
L951
IC951
ERROR
AMP
OSD
INSERT
IC974
IC976
3.3V_STB
5V
ROUT
GOUT
BOUT
SVM
VDA,VDB
EWD
HOUT
1.8V
V1.8V
8V
12V
32V
85
86
87
65
22, 23
21
67
9
3
1, 7
IC451
PARABOLA AMP
B1
IC601
AUDIO AMP
IC401
V. OUT
PARABOLA DRIVE
T522
FBT
Q522
H. OUT
13
23
5
Q461
FOCUS
SCREEN
EHV
R
G
IC351
B
RGB OUT
Q208,Q209
VM OUT
CRT SOCKET
PWB
FRONT CONTROL
PWB (2/2)
V
DY01
DEF YOKE
H
V01
VM
COIL
J801
HEADPHONE
SPEAKER L
SPEAKER R
2-4(No.YA195)(No.YA195)2-3
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/2)
D706
C777
.1
IC702
IC976
R978
Y981
3.3K
X
C986
C985
BL_GND
3.3V_STB
A_VCC
A_GND
H_DRIVE
P_ON/OFF
VDRA+
VDRB-
PROTECT
VER_PROTECT
47/16 .1
STB1
8V
5V
12V
3.3V
NECK
HFB
ABL
EW
32V
TU001
X
L001
K103
R101
10
CF101
R005
X
75
C001
.01
C002
10/50
L002
C004
470/16
R001
C003
220
.1
R002
R003
220
C005
.0022
33/16
R004
27K
C006
Y973
X
x
K101
C101
.0047
3.9K
X
R008
C111
470/16
L003
L101
6.8K2.7K
180
R104
R102R103
Q101
22
R105
100
R106
C102
.0047
.0047
10/50
C103
C104
R006
X
X
R007
D001
Q002
X
MAIN PWB ASS'Y(1/2)
*
J801
Note: 1. Refer to part list for the part number of IC701 and IC702.
ޓޓ 2. Refer to page 2-17 for voltages of this circuit diagram.
3. Refer to page 2-18 for waveforms of this circuit diagram.
SCW-1072A-H2 [AV-2934L/ESK]
IC974
10/50
C110
.1
R107
4.7K
D101
2.2K
C109
.0047
R109
Y007
*5
X
Q102
Y004
0
Q103
*5
2.2K
R108
X
Y006
C108
Q001
X
Y005
0
0
19
CN002
0
Y709
Y_GND
SDA1
SCL1
*4
L713
.22
3.3K
C768
R745
10K
R784
100
R744
1
.01
C736
C782
.1
*8
D702
C735
0
Y707
V3
C654
X
Y724 Y728
X
Y814 Y813
XBW
FRONT CONTROL
PWB ASS'Y
CN002
18
17
16
15
14
13
12
11
X
Y708
V3
L3
GND_INR3KEYIN
12V
Y_GND
PW
VER_PROTECT
3.3K
X
X
220
R743
10K
D711
D712
R741
R785
100
R742
.1
X
1
D703
C744
C745
R739
C739
C738
.1
.1
C737
5.6K
10K
10K
R716
5.6K
75
150
R718
R717
R730
R719
L2
R2
V2/Y
GND
9 8 7 6 5 4 3 2 1
10
ROTATION
B_MUTE
L_AOUT
A_GND
W-B1
.22
C767
1
.1
.1
*8
C740
D704
C741
0
Y710
R768
100
C1
C1_GND
Y1/CVBS1
A_GND
A_VCC
CRT SOCKET
PWB ASS'Y
CN00T
CN00T
R_AOUT
1.8V
PW_LED
REMOTE
R736
100
*4
L712
C766
.22
C764
.1
C763
.22
C761
.1
C760
.22
C758
.22
R734
100
C757
560p
C779
C753
10/50
C752
C751
R782
1.2K
R729
C780
.1
C750
.1
C749
.1
C748
.1
C746
.1
27K
R726
R724
R778
X
LC701
X
*8
D710
10/50
C743
C742
10/50
X
R769
HP_L
R720
R721
X
R770
HP_R
P_ON/OFF
X
B_MUTE
Y702
8V
0
CVBSO/PIP
12V
Y703
0
CVBSO/PIP_GND
A_MUTE
Y601
X
Y602
X
CP650
!
Y_GND
D603
*3
220/16
220/16
12V
*3
V1.8A
L711
*4
C765
100/16
L710
*4
L709
*4
C762
100/16
L708
*4
L707
*4
C759
100/16
R735
100
R733
100
R732
1k
D708
R731
*3
1k
C756
L706
*4
.1
C755
10/50
C754
.1
.1
.1
Y705
0
.1
Y706
0
X
C747
L716
10/50
*4
100
R728
10k
R727
47
R725
*1
Q702
1K
X
R723
R722
470
470
5V
3.3K
R629
X
R630
3.3K
R631
D601
*3
D607
*3
Q601
C607
C608
*2
R608
X
R609
27K
R616
X
D341
D342
*3
D343
*3
R310
X
Q306
X
R314
X
R313
X
K701
ABL
H_DRIVE
HFB
OFF_MUTE
R617
2.2K
R601
X
R662
2.2K
R602
1K
R603
R611
8.2K
Q602
*2
C610
R610C609
100K33/50
R623 R620
33K 10K
Q607
R622
*1
10K
R624
68K
R341
0
D344
X
R342
X
C341
220/16
X301
X
C302
X
R307
C303
X
X
R308
Q305
X
Y715
Y301
X
X
R612
100K
10/50
Q608
*1
X
X
R311
10K
C601
R618
Q603 Q604
R621
2.2K
R309
X
R312
C304
X
K301
X
C656
10/50X100/50
C655
X
R613
X
C613
10/50
C342
X
X
C305
X
C306
X
C307
X
C308
X
Y716
IC601
D602
X
C602
10/50
X
10K
R605
R604
R619
R614
100K
R615
X
Q605
Q341
*2
R343
0
IC301
X
0
AUDIO AMP
.22.222.2
C603C604R606
X
Y603
Q606
X
R344
0
D345
*3
X
R315
XX
C612 C611
X
R625
R345
Y303
BW
0
Y302
R320 R321
XX
R319
X
C316
X
C315
X
Q307
C314
X
X
C313
X
C312
X
C311
X
L303
C310
X
L302
C309
X
X
X
R316
R317
L301
X
BASS
R_AOUT
L_AOUT
X
C614
C605
.22
C606
.22
D605
D604
R607
2.2
X
270
R626
R627
X
*5
Q609
Q610
GND GND
X
R318
X
X
X
W-B
X
D606
CVBSO/PIP
CVBSO/PIP_GND
OFF_MUTE
R632
1K
C661
220/16
270
R628
*5
Q611
Y009
Y010
Y604
BW
Y711
BW
Y719
0
Y720
Y721
X
Y722
0
L304
X
C317
X
3.3V
PB_GND
V2/Y_GND
PR_GND
5V
12V
5V
SCL1
SDA1
NECK
PB
V2/Y
PR
C1_GND
C1
S_V_DET
Y1/CVBS1
Y_GND
VDO_DET
L1
R1
GND
BASS
A_GND
V2/Y
V2/Y_GND
PB
PB_GND
PR
PR_GND
L2
R2
5V
V_OUT
L_OUT
R_OUT
GND GND
R816
75
R801
Y801
Y819
7500
LC801
X
LC802
LC803
LC804
R808
X
R809
0
C809
X
Y725
X
Y815
X
K601
K702
BW
Y802
D814
R802
0
D801
Y818
0
R803
0
D802
D810
X
Y803
*8
Y816
X
Y804
0
X
Y805
D811
X
R805
Y806
*8
X
Y807
Y808
X
Y817
0
D803
D804
R807
C804
100
470/16
D813
Q801
*8
C802
10/50
R810
D805
R812
C803
390
10/50
XX
D806
Q803
Q805
*2
100K
R814
K107
Y717
Y712
0
Y713
0
Y714
BW
Y718
0
GND
GND
S1
VIDEO-1
V2
J801
*
S-VIDEO
J805
J803
X
J802
J802
INPUT
OPEN
VIDEO-2
COMPONENT
VIDEO
INPUT
OUTPUT
L1
R1
R804
150
D751
D753
75
R806
75
D812
*8
R815
75
J804
82K
R811
390
R813
82K
Q804
FRONT CONTROL
PWB ASS'Y
CN001
9 8 7 6 5 4 3 2 1
CN00C
220
220
220
220
R762
R763
R764
R765
5V
PROT
SDA1
SCL1
5V
V1.8A
R796
D707
SCL0
SDA0
STB1
PW
CONT
1.8V
P_ON/OFF
PROTECT
4.5/OTHER
3.58/OTHER
STB1
A_VCC
A_GND
NECK
H_DRIVE
VDRA+
VDRB-
SDA1
SCL1
0
Q708
*2
R795 Q707
100K *1
SCL0
SDA0
L701
*4
1.8V
L702
*4
L703
*4
R792
X
8V
5V
5V
12V
L717
3.3V
*4
NECK
CONT
HFB
ABL
C707
EW
C708
100/16
EW
VDRB-
VDRA+
C778
47/16
R760
100
100
R761
R974
1K
Q791
Y791
X
P_ON/OFF
R737
3.3K
C965C983
.1
C106
2.2K
R110
C105
.0047
R738 W-A2
Q704
10K
C982
*1
47/16
VER_PROTECT
SF102
18p
Y008
X
SF101
C107
.01
Y003
X
.0047
Q703
R779
10K
*2
R780
R781
4.7K
R794
2.2K
*3
C792
.1
R790
1K
470/16
C703
C705
C706
3p
GND
.1
C711
2.2/50
10/50
C713
.022
C714
.001
C715
100
R703
.001
C716
C717
.047
R706
R707
R708
100K
K104
C789
100K
47/50
X
C791
Q705
W-C
15K
R783
R759
100
R793
W-C1
W-A1
C701
.22
C702
.22
27p
.1
C704
C790
3p
X701
R756
100
C785
.22
C709
.01
R701C710
12K6800p
C712
.22
100
R702
R704
100
C718
.1
R705
39K
.01
C719
C720
220
.001
56K
R709
C721
1M
X
D701
*3
R710
ABL
12V
CF702
X
L651
R651
X
D651
X
1.8V
PROTECT
Q706
*4
.22
C775
L715
R757
4.7K
R758
3.3K
3.3k
.1
C776
MAIN MICRO COMPUTER/TELETEXT DECODE/
IF㨯VIDEO㨯RGB㨯SYNC㨯DEF.PROCESS
1
1
X
C723
C724
R711
5.6K
L3
X
R652
X
GND GND GND
X
C725
10K
10K
5.6K
R713
R712
R714
R_OUT
L_OUT
R3
C722Y701
X
CF701
X
R653
X
R654
X
C651
X
Y012 Y011 Y726 Y727 Y723
BW X X X
CN001
PW_LED
12V
ECO_IN
REMOTE
100
X
ECO_IN
.22
C772
.1
C731
C732
X
C660
X
PROT
4.5/OTHER
X
R750
.1
C770
C771
1K
1K
R751
R749
2.2/50
10/50
*4
X
C733
L705
C786
5V
5V
C659
X
R660
XX
GND GND
5V
A_MUTE
ROTATION
3.58/OTHER
.1
2.7K
C769
R748
100
1K
10k
R747
R771
R746
1
C781
.1
10K
10K
5.6K
5.6K
C734
R774
R775
R772
R773
R1
L1
V_OUT
HP_R
HP_L
IC651
X
C653
X
R661
GND GND
1.8V
KEYIN
S_V_DET
VDO_DET
R753
R755
1.2K
1.2K
R740
15K
.1
0
2.2/50
15K
R776
100
D709
R777
C783
1/50
C784
IC701
*
3300p
R715
C727
C728
10/50
C726
Q701
X
X
R655
X
C652
R656
X
L714
C774
C773
*3
0
Y704
220
R754
R752
390
C729
.1
2.2/50
*4
220/50
L704
C730
8V
R766
X
R767
X
C657
R663
X
X
C658
R664
X
IC651
X
R658R657 R659
X
X
X
(No.YA195)2-5 2-6(No.YA195)
Loading...