SCHEMATIC DIAGRAMS
COLOUR TELEVISION
52137200310
AV-28KT1BUF/A, /B, /C,
AV-28KT1SUF
CD-ROM No.SML200310
RM-C1100 TV
/A, /B, /C
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.52137
2003/10
AV-28KT1BUF/A/B/C
AV-28KT1SUF/A/B/C
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 critical
components only with manufactures recommended parts.
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES
The voltage and waveform values have been measured under the
foll owing 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 s ome extent
according to adjustments, use them as reference values.
: Original setting position
when shipped
:DC 20k
:H
:V
:Others
:All DC voltage values
/V
20µS/div
5mS/div
Sweeping time is
specified
3.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit :[
K
M
Ty pe
No indication
OM R
MFR
MPR
UNFR
FR
Composition resistor 1/2 [W] is spec ified as 1/2S or Comp.
(2)Capacitors
Capaci tance value
1 or higher :[pF]
less than 1
]
:[K
]
:[M ]
:Carbon resistor
:Oxi de met al film resistor
:Metal film resistor
:Metal plate resistor
:Uninflammable resistor
:Fusible resistor
:[µF]
Withstand voltage
No indication :DC50[V]
Others :DC withstand voltage [V]
AC indicated
Electr ol ytic Capaci tors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
Ty pe
No indication
MM
PP
MPP
MF
TF
BP
TAN
(3)Coils
No unit
Others
4.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 circui t diagram may not agree with th ose indicated in
the part list.
When ordering parts, please use the numbers that appear
in the Parts List.
:AC withstand voltage [V]
:Ceramic capacitor
:Metalized mylar capacitor
:Polypropylene capacitor
:Metalized polypropylene capacitor
:Metalized film capacitor
:Thin film capacitor
:Bipolar electrolytic capacitor
:Tantalum capacitor
µ
:[
H]
:As specified
AV-28KT1BUF
AV-28KT1SUF
Sep. 2003 No. 52137
AV-28KT1BUF
AV-28KT1SUF
CONTENTS
SEMICONDUCTOR SHAPES
BLOCK DIAGRAM
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM
CRT SOCKET PWB CIRCUIT DIAGRAM
SIDE CONTROL PWB CIRCUIT DIAGRAM
LED PWB CIRCUIT DIAGRAM
SWITCH PWB CIRCUIT DIAGRAM
PATTERN DIAGRAMS
MAIN PWB PATTERN
CRT SOCKET PWB PATTERN
SIDE CONTROL PWB PATTERN
LED PWB PATTERN
SWITCH PWB PATTERN
SEMICONDUCTOR SHAPES
TRANSISTOR
BOTTOM V IEW
E
C
B
ECB
BCE
(G)(D)(S )
FRONT VI EW
ECB
ECB
2-2
2-3
2-5
2-15
2-17
2-19
2-20
2-21
2-23
2-24
2-25
2-26
TOP VIEW
CHIP TR
C
BE
IC
BOTTOM VIEW FRONT VIEW TOP VIEW
OUT
E
IN
IN OUTE
1 N
1 N
CHIP IC
TOP VIEW
N
N
N
1
N
1
N
1
N
2-2
No.52137
BLOCK DIAGRAM
AV-28KT1BUF
AV-28KT1SUF
AV-28KT1BUF
AV-28KT1SUF
TU200
38.9MHz-TV TUNER
SC1_RGB
SC2_RGB/DVD/DVB
SDA
Video
Sound
Z200
SAW
Filter
Z202
SAW
Filter
IC205
IC206
R
G
B
FB
EXT_CVBS/Y
CVBS
QSS
SC3_V_OUT
SC1_V_OUT
R
G
B
FB
IC200
VDP313XY
PIP
R
G
B
Horizontal
IC900
RGB AMPLIFIER
R
G
B
Vertical Stage
Yoke
IC600
CRT
SCL
SC1
SC2
IF
SVHS-Y
SC3
IC201
VIDEO SW
SC2_V_OUT
TO_PIP
SCL
SDA
SC1
SC2
FRONT/SC3
DVD/DVB/BAV
SCL
SDA
SYNC
TV_LINK
IC502
(E2PROM)
IC700
CVBS_TEXT
SDA
SCL
IC500
(MicroController)
IC704
L
R
OSD_R
OSD_G
OSD_B
OSD_FBL
L
R
IC301
AUDIO
AMPLIFIER
Headphone
8 ohm
12W
8 ohm
12W
No.52137
2-3 2-4
No.52137
AV-28KT1BUF
AV-28KT1SUF
AV-28KT1BUF
AV-28KT1SUF
CIRCUIT DIAGRAMS
MAIN PWB CIRCUIT DIAGRAM [1/5]
MAIN PWB
VE-20120604
VE-20127801
VE-20127796
(1/5)
(AV-28KT1BUF/A, AV-28KT1SUF/A)
(AV-28KT1BUF/B, AV-28KT1SUF/B)
(AV-28KT1BUF/C, AV-28KT1SUF/C)
No.52137 No.52137
2-5
CRT SOCKET PWB
SIDE CONTROL PWB
2-6
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