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AV-29M201
FRONT CONTROL PWB PATTERN
FRONT
2-12
No.51731
AV-29M201 STANDARD CIRCUIT DIAGRAM
n 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
(2)Setting
positions
of
each knob/button and
variable resistor
(3)Internal resistance of tester
(4)Oscilloscope sweeping time
(5)Voltage values
– S ince 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
œ
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
œResistance value
No unit
:[¶]
K
:[K¶]
M
:[M¶]
œRated allowable power
No indication
:1/10[W]
Others
:As specified
œType
No indication
:Carbon resistor
OMR
:Oxide metal film resistor
MFR
:Metal film resistor
MPR
:Metal plate resistor
UNFR
:Uninflammble resistor
FR
:Fusible resistor
*Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
œCapacitance value
1 or higher
less than 1
œWithstand voltage
No indication
:DC50[V]
Others
:DC withstand voltage [V]
*Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
VP0005
DP6053
œType
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
: Colour bar signal
(3)Coils
No unit
:[µH]
Others
:As specified
(4)Power Supply
:Original setting position
:B1
when shipped
:DC 20k¶/V
:9V
:H
Ë 20µS/div
:5V
:V
Ë 5mS/div
*Respective voltage values are indicated
:Others Ë Sweeping time is
(5)Test point
specified
:Test point
:All DC voltage values
: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
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
:[pF]
ISOLATED(NEUTRAL) side GND or never measure with a
:[µF]
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.
ž Since the circuit diagram is a standard one, the circuit and
circuit constants may be subject to change for improvement
without any notice.
AV-29M201
the
LIVE
side
GND
and
May 2000 No.51731
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