JVC AV-27260 /AR Administrator Guide

SCHEMATIC DIAGRAMS
No. 51800C
Dec. 2001
AV-27260
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
AV-27260 /AR
AV-27260 /AS
AV-27260 /AZ
CD-ROM No. SML200201
COLOR TELEVISION
BASIC CHASSIS
GC
TV

AV-27260
q NOTE ON USING CIRCUIT DIAGRAMS
1. SAFETY
The components identified by the symbol and shading are
critical for safety. For continued safety replace safety critical
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 : Color bar signal
(2) Setting positions of each knob/button and
variable resistor : Original setting position when
shipped
(3) Internal resistance of tester : DC 20kØ/V
(4) Oscilloscope sweeping time : H ⇒20µS/div
:V ⇒5mS/div
: Others ⇒Sweeping time is
specified
(5) Voltage values : All DC voltage values
9Since the voltage values of signal circuit vary to some extent ac-
cording to adjustments, use them as reference values.
3. INDICATION OF PARTS SYMBOL [EXAMPLE]
•In the PW board : R1209 →R209
4. INDICATIONS ON THE CIRCUIT DIAGRAM
(1) Resistors
•Resistance value
No unit : [Ø]
k:[kØ]
M:[MØ]
•Rated allowable power
No indication : 1/16 [W]
Others : As specified
•Type
No indication : Carbon resistor
OMR : Oxide metal film resistor
MFR : Metal film resistor
MPR : Metal plate resistor
UNFR : Uninflammable resistor
FR : Fusible resistor
9Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2) Capacitors
•Capacitance value
1 or higher : [pF]
less than 1 : [µF]
•Withstand voltage
No indication : DC50[V]
AC indicated : AC withstand voltage [V]
Others : DC withstand voltage [V]
9 Electrolytic Capacitors
47/50[Example] : Capacitance value [µF]/withstand voltage[V]
AV-27260 /AR
AV-27260 /AS
AV-27260 /AZ STANDARD CIRCUIT DIAGRAM
•Type
No indication : Ceramic capacitor
MY : Mylar capacitor
MM : Metalized mylar capacitor
PP : Polypropylene capacitor
MPP : Metalized polypropylene capacitor
MF : Metalized film capacitor
TF : Thin film capacitor
BP : Bipolar electrolytic capacitor
TAN : Tantalum capacitor
(3) Coils
No unit : [µH]
Others : As specified
(4) Power Supply
:B1
: B2(12V)
:9V
:5V
9Respective voltage values are indicated
(5) Test point
: Test point
: Only test point display
(6) Connecting method
: Connector
: Wrapping or soldering
: Receptacle
(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 cau-
tion is not respected, an electric shock may be caused. Therefore,
make sure that the power cord is surely removed from the recepta-
cle 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 the LIVE side GND and ISOLATED
(NEUTRAL) side GND at the same time with a measuring appara-
tus ( oscilloscope, etc.). 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 cir-
cuit constants may be subject to change for improvement with-
out any notice.
Dec. 2001 No. 51800C

AV-27260
2-2 No.51800C
CONTENTS
SEMICONDUCTOR SHAPES............................................................................................................................ 2-2
BLOCK DIAGRAM ...................................................................................................................................................... 2-3
CIRCUIT DIAGRAMS................................................................................................................................................ 2-5
MAIN PWB CIRCUIT DIAGRAM (1/3) ....................................................................................................................... 2-5
MAIN PWB CIRCUIT DIAGRAM (2/3) ....................................................................................................................... 2-7
MAIN PWB CIRCUIT DIAGRAM (3/3) ....................................................................................................................... 2-9
AV SELECTOR PWB CIRCUT DIAGRAM ............................................................................................................. 2-11
PIP PWB CIRCUIT DIAGRAM .................................................................................................................................... 2-13
CRT SOCKET PWB CIRCUIT DIAGRAM .............................................................................................................. 2-15
FRONT CONTROL AND FRONT AV INPUT PWB CIRCUIT DIAGRAMS .................................................. 2-16
PATTERN DIAGRAMS ........................................................................................................................................... 2-17
MAIN PWB PATTERN .................................................................................................................................................... 2-17
AV SELECTOR PWB PATTERN ................................................................................................................................ 2-19
CRT SOCKET PWB PATTERN .................................................................................................................................. 2-21
PIP PWB PATTERN ........................................................................................................................................................ 2-22
FRONT CONTROL AND FRONT AV INPUT PWB PATTERNS ...................................................................... 2-23
CHANNEL CHART (US)....................................................................................................................................... 2-25
CHANNEL CHART (CA) ...................................................................................................................................... 2-26
E
C
B
OUT
E
IN
ECB EC
(G)(D)(S)
B
IN E OUT
ECB E
C
B
ECB
CHIP TR
TOP VIEWBOTTOM VIEW FRONT VIEW
TRANSISTOR
TOP VIEWBOTTOM VIEW FRONT VIEW
IC
TOP VIEW
CHIP IC
1N
1N
1N
1
N
N
N
N
N
1
SEMICONDUCTOR SHAPES

AV-27260
2-3No.51800C
BLOCK DIAGRAM
2-4 No.51800C
AV-27260
J601
COMPONENT
VIDEO-IN
J501
INPUT1
PB
VIDEO/Y
IC101
1 CHIP DECODER
IC701
MICRO
COMPUTER
T502
FBT
POWER SUPPLY
CIRCUIT
REG.
AC IN
120V/60Hz
B1
FOCUS
IC001
MTS&
TONE/VOL
CONTROL
IC702
EEPROM
CF021
4.5MHz
TRAP
TU001
TUNER
S-VIDEO
VIDEO
AUDIO L/MONO
AUDIO R
IF R, G, B
CF041
4.5MHz BPF
RGB DRIVE
IF
SIF
MPX
V. OUT
H. OUT
VTV R, G, B
V01
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0
SCL0
SDA0
Y
C
VIDEO
C
Y
C
Y
AV SELECTOR PWB (1/2)
FRONT AV INPUT PWB
CRT SOCKET PWB
AV SELECTOR PWB (2/2)
MAIN PWB
FRONT CONTROL PWB
IC421
VERT OUT
J502
INPUT2
AUDIO L/MONO
AUDIO R
J401
INPUT3
(FRONT)
VIDEO
AUDIO L/MONO
AUDIO R
J503
AUDIO OUT
AUDIO L
AUDIO R
VOL+
REMOCON
RECEIVER
VOL- CH+ CH- MENU
ON TIMER
LED
IC621
AUDIO OUT
Q511
H. OUT
SCREEN
HV
L/R
L3/R3
L/R
V
H
DY01
DEF YOKE
SP
L
SP
R
COM_Y
COM_CB
COM_CR
SCL1
SDA1
VTV
IC201
3L DIGITAL
COMB FILTER
LPF
BPF
AMP
BUF
Y
C
Y
C
IC301
PIP
CONTROLLER
TU001
TUNER
V-PIP(TV)
SCL0
SDA0
VP
V-PIP(EXT.)
PIP PWB
AFT2 HP
OSDR,OSDG,OSDB,OSDYS
VC_R
VC_G
VC_B
VC_YS CNMPX
AUDIO_L/R
POWER
SCL0,SDA0
+
C1
VAMP
IC502
VIDEO
SEL.
Y1
Y1
BPF
IC501
VIDEO
SEL.
IC504
SW.
V1
Q211,Q212
C1
AMP
L1/R1
L2/R2
L3/R3
IC101
IF DET
IF
PR
Y1,C1
V1
V1
Q501,Q502
V3
V3
V3
AFT2
HP,VP
S421
V. CENTER SW
IC381
SW.
EL1/ER1
EL1/ER1
L/R
IC371

2-6No.51800C 2-5
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM (1/3)
AV-27260
No.51800C
AV-27260
: NRSA63J-0R0X
: UN2212-X
: MTZJ9. IC-T2
: 1SS133-T2
: 2SA1037AK/QR/-X
: 2SC2412K/QR/-X
: NON MOUNT
∗3
∗5
: MTZJ5. 6B-T2
∗6
∗4
∗1
∗2
X
0
: IM-BW
BW
NOTE
6.8
QRX039J-6R8
R856
SDA0
VTV
SCL0
AGC_MUTE
BT
0
QRN143J-0R0X
L041
AFT1
0
R002
5V_A
1000/16
C003
∗1
Q021
9V_VC
MTZJ9.1C-T2
D010
X
C289
10/50
C002
5.6k
R140
10/16
N
BP
C136
QGA2501C5-05ZCN004
1k
R043
100/16
C014
100/16
C023
0.01
C024
∗2
Q150
0.01
C046
∗1
Q024
0.1 B2
C027
100
R294
5.6k
R860
V_CCD
10/50 C042
∗2
Q041
2.7k
R041
2.2k R295
0.1
B3
C116
X
Y004
12k
R021
X
C022
0.1 TF C609
∗6
D101
X
R291
120k
R292
BW
D602
220k
R293
EHT
BW
D604
BW
D605
MPX
10/50
C045
4.7/50
C001
47k
R001
330R003 330R004
0
QRN143J-0R0X
L021
QAU0247-001
! TU001
QAX0349-001
CF001
22
QQL244K-220Z
L022
1000p
C025
QAX0639-001Z
CF021
2.7k
R038
0.01
C011
0.01C012
5.6k
R013 100
QRE121J-101Y
R014
18
R015
27
R016
1.8k
R012
82
R011
CH 150p
C013
0.39QQLZ014-R39
L012
X
L011
2SC5083/L-P/-T
Q011
SD
0.01
C016
0.01 C015
X
R017
X
L013
10/50 C028
FSC
0R610
0
QRN143J-0R0X
L027 100/16
C038
470/10
C036
100
R023
.47/50
C026
0.01
C037
1k
R024
QAX0642-001Z
CF041
∗6
D102
820
R028
0.01
C288
560R025
150
R022
1k
R042
0.01
C030
47p CH
C044
47p CH
C043
22
QQL244K-220Z
L042
CE40668-001Z
X201
330
R026
10p CH
C201
33kR201
10/50
C041
.22/50
C202
2200p
C203
∗4
D352
2200/6.3
C111
0.01 C112
2.2kR301 2.2k
R302
2.2kR303
0
R354
100R306
100R305 100R304
0R611
COM_Y/CV
0R612
100K
R018
X
R019
0.1 B3
C393
0.1 B3
C394
0.1 B3
C395
100
R101
100
R102
QAX0324-002
SF011
∗5
Q711
100/16
C391
0.01C392
10k
R799
10k
R798
0
R360
10k
R359
0.1TF C610 0.1TF C611
TB1253AN
1CHIP DECODER
IC101
QQL244K-470Z
L101
0.01
C237
1/50C114 .47/50C113 1MR111
27 2W
QRL029J-270
R857
18 2W
QRL029J-180
R858
560
NRSA02J-561X
R290
∗3
D353
33p
C047
0.01
C048
0.15 TF
C354
0.1 TFC115
15k
R047
150k
R048
XC005
X
C006
∗1
Q352
0
R355
12k
R356
X
R141
BW
K939
33/16
C352
XC399
X
C402
47/25
C603
75
R601
75
R602
QQR1199-001
LC601
QQR1199-001
LC602
75
R603
47/25
C601
47/25
C602
56
QQL244K-560Z
L001
X
LC001
QQR1199-001
LC603
0
Y003
0
Y002
XC396 XC397 XC398
∗2
Q025
0.01
C034
LOOP_F
XR110
∗3D305
∗3D307
∗4D601
∗4D603
∗4D606
∗3D306
∗3D308
∗3D309
∗3D310
X
1/2W
R859
0
R231
BW
D855
0.82 TF
C021
∗1
Q233
∗1
Q232
47k
R238
56p CH
C233
X
C234
56
QQL244K-560Z
L232
3.9k
R237
3.3k
R241
1.5k
R243
100/16 C287
X
CH
C133
X
CH
C131
X
R132
X
R133
0
R131
5.6k
R134
∗1
Q131
1k
R135
X
CH
C132
220/16 C282
0.01
C283
470
NRSA02J-471X
R288
ABL
1.8k
R281 680
R283
xR285
150k R289
4.7k R286
10/50 C286
X R284
.47/50 C281
3.9k R282
2.2/50
C284
10000p
C285
100
R287
AN7809F
IC852
H_OUT
FBP
EW
COUT
3.3k
R020
YOUT
1k
R136
∗1
Q132
∗1
Q133
1k
R137
1k
R139
1k
R138
47p
CH
C134
33p CH
C135
AN7805F
IC853
100/16
C856
100/16
C857
12.0V
100/16
C853
100/16
C854
0.01
C151
VC_R
VC_G
VC_B
VC_YS
GND
TV
V_OUT
X_RAY
QNN0349-002
J601
J601
SCL0 SDA0
COM_CB
AFT1
COM_CR
AFT1
VC_YS VC_R VC_G VC_B SCL0 SDA0
AGC_MUTE
SD
COM_CR COM_CB
COM_Y/CV
SD
V_OUT
TV
COM_Y/CV
H_OUT
X_RAY
FBP
EW
H_OUT
FBP
EW
SDA0
SCL0
CONTROL
VC_R
VC_G
VC_B
VC_YS
AGC_MUTE
TV
V_OUT
X_RAY
FSC
TU NC
TUNER
AGC
FM
IF5V LOCKSCL SDAADRS
DEMOD.
AUDIO
AT T
SAW FILTER
BTNC
PIF PROC.
AUDIO
OUT
ANT INPUT
PIF GND
RF AGC
AGCIF
LOOP
F
EXT_AU_IN
COM_Y
DC NF
AFT OUT V REF IFVcc DET
OUT
DE EMP
R290
4.5MHzBPF
Y
Pb
Pr
()
COM_Y
()
IFGND
VCO Adj
IFVcc
F
9V
5V
X201
Q011
4.5MHzTRAP
or
or
BA17809T
BA17805T
R288
(9V)
Y Clamp Filter
CVBS Int in
APL Det Filter
CVBS Ext in
U in
V in
C in
CVBS out
Dig GND
V out
V Ramp
H Vcc(9V)
H AFC Filter
Black Det Filter
H out
Sync out
X Ray
FBP in/GP out
Dig VDD
EW out
ABCL in Ik in EHT in SDA SCL RGB Vcc(9V) Ext B in Ext G in Ext R in Ys/Ym in SVM out YC GND B out G out R out YC Vcc(5V) CW out APC Filter X'tal
MAIN PWB ASS'Y
SGC-1020A-M2
(AV-27260/AR)
SGC-1025A-M2
(AV-27260/AS)
SGC-1019A-M2
(AV-27260/AZ)
INPUT-2
(COMPONENT
VIDEO INPUT)
TO CRT SOCKET
PWB CN004
!
!
!
4.0Vp-p(H)
IC101
IC101
16
3.6Vp-p(H)
15
4.4Vp-p(H)
14
0.66Vp-p(H)
IC101 42
47
0.8Vp-p(H)
IC101
4.6Vp-p(H)
IC101 34
2.0Vp-p(v)
IC101 38
2.3V
4.9V
2.4V
8.8V
2.2V
1.6V
5.2V
4.6V
8.8V
4.0V 6.8V 4.8V 2.6V 2.6V 4.9V
31.2V
0V
3.7V 3.1V
8.9V
1.8V
1.1V
5.2V
0V
2.3V
2.4V
8.8V
3.8V
3.9V
3.9V
2.2V 2.2V 2.1V 1.6V
2.9V
3.8V
5.0V
3.1V
1.8V 0.7V
2.5V
3.2V
4.0V
7.2V
1.7V
3.0V
2.7V
2.5V
2.5V
4.9V
3.1V
2.2V
2.2V
0V
0V
8.8V
3.1V
2.6V
2.6V
2.2V
5.9V
0V
0V
3.2V
0.9V 4.1V
1.5V
1.0V
0V
4.1V
4.0V
8.8V
6.8V
1.8V
2.4V
2.4V 2.3V
2.5V
0.1V
1.0V
1.7V
4.3V
8.9V
3.7V 3.7V 5.8V
3.1V
8.9V
2.4V
3.1V
0V
0V
1.0V
4.0V
3.4V
8.8V
0.4V
1.5V
8.9V
0V
12.5V
5.0V
10.7
V
0V
8.8V
8.9V
8.2V