JVC AV-29BF11ENS Service Manual page 42

AV-29BF11ENS
AV-29BF11EPS
AV-29BF11EES
FRONT CONTROL PWB PATTERN
2-24
TOP
No.52084
AV-29BF11ENS
AV-29BF11EPS
AV-29BF11EES
STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS
1.SAFETY
The components identified by the
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
Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference values.
3.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance value
No unit
K
M
Type
No indication
OMR
MFR
MPR
UNFR
FR
Composition resistor 1/2 [W] is specified as 1/2S or Comp.
(2)Capacitors
Capacitance value
1 or higher
less than 1
VP0209
DP8080
Withstand voltage
No indication
symbol and shading are
Others
AC indicated
Electrolytic Capacitors
47/50[Example]:Capacitance value [µF]/withstand voltage[V]
Type
No indication
MM
: Colour bar signal
PP
MPP
MF
: Original setting position
TF
when shipped
BP
TAN
:DC 20k /V
(3)Coils
:H 20µS/div
No unit
:V 5mS/div
Others
:Others
Sweeping time is
specified
:All DC voltage values
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
:[K ]
the receptacle when, for example, the chassis is pulled out.
:[M ]
(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
:Carbon resistor
and ISOLATED(NEUTRAL) side GND at the same time.
:Oxide metal film resistor
If the above precaution is not respected , a fuse or any parts will be broken.
:Metal film resistor
Since the circuit diagram is a standard one, the circuit and
:Metal plate resistor
circuit constants may be subject to change for improvement
:Uninflammable resistor
without any notice.
:Fusible resistor
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
:[pF]
in the Parts List.
:[µF]
AV-29BF11ENS
AV-29BF11EPS
AV-29BF11EES
:DC50[V]
:DC withstand voltage [V]
: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
Sep. 2002 No. 52084