AV32H20EUS
AV28H20EUS
AV28H20EUB
No.51945
AV32H20EUS
AV28H20EUS
AV28H20EUB
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
following conditions.
(1)Input signal
: Colour bar signal
(2)Setting positions of
each knob/button and
variable resistor
(3)Internal resistance of tester
:DC 20k
/V
(4)Oscilloscope sweeping time
:H
20µS/div
:V
5mS/div
:Others
Sweeping time is
specified
(5)Voltage values
:All DC voltage values
Since the voltage values of signal circuit vary to some extent
according 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
:[
]
K
:[K
]
M
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
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
: Original setting position
when shipped
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.
Type
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
:[ µ H]
Others
:As specified
(4)Power Supply
:B1
:9V
:5V
Respective 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
:[M
]
Capacitance value
1 or higher
:[pF]
less than 1
:[µF]
Withstand voltage
No indication
:DC50[V]
Others
:DC withstand voltage [V]
AC indicated
:AC withstand voltage [V]
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
No indication
:Ceramic capacitor
:B2 (12V)
AV32H20EUS / AV28H20EUS / AV28H20EUB
May 2002 No. 51945
2-32
ISOLATED
SOUND
HYPER
ECO
TIMER
POWER
1
3
2
CDS
1
2
1
2
5
10
15
20
24
25
25
24
20
15
10
5
2
1
LIVE
CKF1432-B01-1 /2!
TAKADA
01.02.09
R035
VA901
S901
D007
W037
CN002
PW
D008
D009
D010
D011
D012
D013
D014
D018
IC001
LF901
W022
Q004
Q005
R005
R008
W023
W024
R036
R037
W027
W028
W032
W033
Y901
Y902
Y903
Y904
UL MARK
T3.15AH
250V
1
5
10
12
2
1
W001
R018
J
F901
W
W035
C003
C004
W020
C019
C022
C901
Q001
Q002
Q003
Q006
Q007
R003
R004
W025
R020
R038
R039
W026
W030
W031
W034
W036
R006
FRONT
VP0205
DP8080
FRONT CONTROL PWB PATTERN
[2/2]
