JVC AV-25LS, AV-25LH, AV-25LX, AV-2508TEE Schematic
AV-25LS AV-25LX
AV-25LH AV-2508TEE
SCHEMATIC DIAGRAMS
COLOUR TELEVISION
BASIC CHASSIS
CH
AV-25LS AV-25LX
AV-25LS
(-AU)
AV-25LX
AV-25LH AV-25LX
AV-2508TEE
CD-ROM No. SML200107
POWER
DISPLAY
MENU
CHANNEL VOLUME
SYSTEM
SOUND MUTING
COLOUR
TV/VIDEO
123
I/II
456
PICTURE MODE
7809
RETURN
CHANNEL SCAN
-/--
OFF TIMER
TV/TEXT
ECO SENSOR
TEXT
REVEAL HOLD INDEX STORE
MODE SIZE SUBPAGE CANCEL
RM-C352 REMOTE CONTROL UNIT
RM-C352-1C
[AV-25LS]
[AV-25LS
(-AU)
POWER
DISPLAY
MENU
CHANNEL VOLUME
SYSTEM
SOUND MUTING
COLOUR
TV/VIDEO
123
I/II
456
PICTURE MODE
7809
RETURN
CHANNEL SCAN
-/--
OFF TIMER
ECO SENSOR
RM-C353 REMOTE CONTROL UNIT
RM-C353-1C
[AV-25LH]
]
POWER
DISPLAY
MENU
CHANNEL VOLUME
SYSTEM
SOUND MUTING
COLOUR
TV/VIDEO
123
456
PICTURE MODE
7809
RETURN
CHANNEL SCAN
-/--
OFF TIMER
TV/TEXT
ECO SENSOR
TEXT
REVEAL HOLD INDEX STORE
MODE SIZE SUBPAGE CANCEL
RM-C355 REMOTE CONTROL UNIT
RM-C355-1C
[AV-2508TEE]
POWER
DISPLAY
MENU
CHANNEL VOLUME
SYSTEM
COLOUR
SOUND MUTING
TV/VIDEO
123
456
PICTURE MODE
7809
RETURN
CHANNEL SCAN
-/--
OFF TIMER
ECO SENSOR
RM-C357 REMOTE CONTROL UNIT
RM-C357-1C
[AV-25LX]
(-A)
[AV-25LX
[AV-25LX
]
(-AU)
]
(-A)
(-AU)
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
No. 51848
Jul. 2001
AV-25LS AV-25LX AV-2508TEE
AV-25LS(-AU) AV-25LX(-A)
AV-25LH AV-25LX(-AU)
STANDARD CIRCUIT DIAGRAM
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 : Colour 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
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
AV-25LS AV-25LX
AV-25LH AV-2508TEE
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 : Non-Flammable 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]
(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 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 ( 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 cir-
•
cuit constants may be subject to change for improvement without any notice.
Jul. 2001 No. 51848
AV-25LS AV-25LX
AV-25LH AV-2508TEE
CONTENTS
SEMICONDUCTOR SHAPES ................................................................................................................................. 2-2
BLOCK DIAGRAM.......................................................................................................................................................... 2-3
CIRCUIT DIAGRAMS
Model
AV-25LS
AV-25LS-AU
P.W.B. name
MAIN PWB CIRCUIT DIAGRAM (1/2) P2-5 P2-7
MAIN (2/2) AND CRT SOCKET PWB CIRCUIT DIAGRAMS P2-9 P2-11
AV-25LH
PATTERN DIAGRAMS
Model
Patten name
MAIN PWB PATTERN P2-13
CRT SOCKET PWB PATTERN P2-15
AV-25LS
AV-25LS-AU
AV-25LH
AV-25LX
AV-25LX-A
AV-25LX-AU
AV-2508TEE
AV-25LX
AV-25LX-A
AV-25LX-AU
AV-2508TEE
SEMICONDUCTOR SHAPES
TRANSISTOR
E
C
B
ECB
IC
OUT
E
IN
IN E OUT
CHIP IC
N
N
EC
B
(G)(D)(S)
ECB
1N
TOP VIEW
1
ECB
1N
TOP VIEWBOTTOM VIEW FRONT VIEW
CHIP TR
C
B
E
TOP VIEWBOTTOM VIEW FRONT VIEW
1N
N
1
N
2-2 No.51848
N
BLOCK DIAGRAM
AV-25LS AV-25LX AV-25LS AV-25LX
AV-2508TEEAV-25LH AV-25LH AV-2508TEE
J801
VIDEO-1
INPUT
J802,J803
COMPONENT
(VIDEO-2)
INPUT
J804
OUTPUT
J771-J773
FRONT IN
(VIDEO-3)
AC IN
TU001
TUNER
AV-25LS-AU
AV-25LX-AU
ONLY
S-VIDEO
VIDEO
AUDIO L/MONO
AUDIO R
V/Y
CB
CR
AUDIO L/MONO
AUDIO R
VIDEO OUT
AUDIO L
AUDIO R
VIDEO
AUDIO L/MONO
AUDIO R
VOL+
SCL
SDA
IF
9,11
V1-C
V1-Y
7
V1-V
8
V1-L
10
V1-R
3
V2-Y
IC801
VIDEO SW
2
V2-L
4
V2-R
37
Vout2
36
Lout2
35
Rout2
43
V3-V
44
L3-L
42
L3-R
19
Yin1
VOL- CH+ CH- MENU
REMOCON
RECEIVER
S901
POWER SW
POWER
LED
F901
SCL
SDA
COUT1
YOUT1
MTV-V
MTV-R
MTV-L
Lout1
Rout1
Vout1
FILTER
FILTER
SF101
SF102
29,30
25
27
13
15
14
26
24
23
Q108
BUF
Q111
BUF
MAIN PWB
28
SIF IN1
29
SIF IN2
23
IF IN1
24
IF IN2
43
42
47
48
46
PROCESSOR
SCL,SDA
SCL1
SDA1
CIN
CVBS/YIN
Y
U
V
D901
RECT
2,3
62,63
IC702
EEPROM
CB
CR
CF104,105
5.5 TRAP
6.5 TRAP
5,6
Rout1
Lout1
CF103
6.0 TRAP
CF106
TRAP
KEY_IN
REMOTE, LED
IC701
V/C DEF.
QSS OUT
7
IC901
POWER
REG
ROUT
GOUT
BOUT
VDRB(-)
VDRA(+)
HOUT
IF VOUT
10
64
51
52
53
35
21,22
33
38
Q104
BUF
Q109
BUF
T901
SW
TRANSF.
PC901
VOLTAGE
FEEDBACK
IC951
ERROR
AMP
SCL
SDA
32
1
IC972
3.3V REG
IC974
REG
L951
R
G
B
AV-25LS,AV-25LH,
AV-25LS-AU
BUF
Q150
CF140
5.5 FILTER
CF141
6.0 FILTER
CF142
6.5 FILTER
Q130
IC602
CF130
FILTER
BUF
SOUND
PROCESSOR
IC401
VERT OUT
Q522
H. OUT
Lout1
Rout1
Q136
BUF
20
12
3.3V_STB
5V
8V
9V
32V
SCL
SDA
40
41
2
BUF
Q132
AV-25LS,AV-25LH,
AV-25LS-AU ONLY
B1
IC601
MULTI SOUND
PROCESSOR
AV-25LX, AV-25LX-A,
AV-2508TEE,AV-25LX-AU
Q137
11
BUF
L, R
L_VOL, R_VOL
IC665
FILTER
IC130
PIF/SIF
DETECTOR
5
2
AUDIO AMP
T551
FBT
26,27
30,31
IC650
10
7
12
FOCUS1
SCREEN
EHV
CRT SOCKET PWB
IC351
VIDEO AMP
J770
HEADPHONE
JACK
SP
L
SP
R
V
DY01
DEF YOKE
H
V01
No.51848 No.51848
2-3 2-4
Loading...