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BM-H2000PN
BM-H2000PN STANDARD CIRCUIT DIAGRAM
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mNOTE 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 knobybutton
and variable resistor
:PAL Colour bar signal
(Composite Video / Input 4)
:Original setting position
when shipped
:DC 20kQV
{4)Oscilloscope sweeping tine
cH
=>20pS/div
wv
=>5mSidiv
:Others => Sweeping time is
specified
(5)Voltage valves
"All DC voltage values
* Since the voltage values of signal circuit vary to some extent
according to adjustments, use them as reference vaiues.
{3)internat resistance of tester
3.INDICATION OF PARTS SYMBOL[EXAMPLE}
'ln the PW board
:R1209
R209
4.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors
Resistance valve
No unit
2[Q}
K
[kQ}
M
-[MQ}
'Rated allowable power
No indication
:1/6[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
*Capacitance vaiue
torhigher
—-[oF}
fess thant
:{yF]
'Withstand voltage
No indication :DC5O[V]
Others
:DC withstand voltage[V]
AC indicated :AC withstand voltage[V]
* Electrolytic Capacitors
:
47/50{Example}:Capacitance value[pF withstand voltage[V]
Type
No indication :Ceramic capacitor
My
:Mylar capacitor
MM
:Metalized myiar capacitor
PP
:Polypropyiene capacitor
MPP
:Metalized polypropylene capacitor
MF
:Metalized film capacitor
TF
:Thin film capacitor
BP
'Bipolar electrolytic capacitor
TAN
'Tantalum capacitor
(3)Coils
No unit
{aH}
Others
"As specified
(4)Power Supply
B1(85V)
J
mm. 282(12V)
LOLOL. :6v
* Respective vollage values are indicated.
(5)Test Point
: Test point
x,
: Only test point display
(6)Connecting method
oO
: Connector
O
: Wrapping or soldering
>
—-
Receptacie
(7)Ground symbol
LS LIVE side ground
zh: ISOLATED(NEUTRAL) side ground
|
EARTH ground
y
: 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 ; ( L) side GND
and the ISOLATED({NEUTRAL)
: ( 7-) 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
ihe 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
circuit constants
may
be subject to
change for improvement without any notice.
Sep. 1995 No.51042
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