WAVEFORM DIAGRAMS
AV28BT7ENS / AV28BT7ENB
MAIN PWB
AV28BT7EES / AV28BT7EEB
Q802 DIC401 6pinIC050 6pinIC050 17pinAV28BT7EPS / AV28BT7EPB
8Vp-p(H)1.7Vp-p(H)0.7Vp-p(H)1.4Vp-p(H)
STANDARD CIRCUIT DIAGRAM
NOTE ON USING CIRCUIT DIAGRAMS
Withstand voltage
1.SAFETY
No indication :DC50[V]
The components identified by the symbol and shading are
crit ical for safety. For continued safety replace safety critical Others:DC withstand voltage [V]
components only with manufactures recommended parts.AC indicated :AC withstand voltage [V]
Electrolytic Capacitors
IC401 17pinIC401 30pinIC401 29pinIC401 19pin
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES47/50[Example]:Capacitance value [?F]/withstand voltage[V]
The voltage and waveform values have been measured under the Type
0.7Vp-p(H)0.8Vp-p(H)0.9Vp-p(H)2Vp-p(H)
following conditions.No indication:Ceramic capacitor
MM
(1)Input signal: Colour bar signal:Metalized mylar capacitor
PP:Polypropylene capacitor
(2)Setting positions of MPP:Metalized polypropylene capacitor
each knob/button and MF:Metalized film capacitor
variable resistor: Original setting position TF:Thin film capacitor
when shippedBP:Bipolar electrolytic capacitor
TAN
(3)Internal resistance of tester:DC 20k /V:Tantalum capacitor
(3)Coils
(4)Oscilloscope sweeping time:H 20?S/div
No unit:[ ?H]
:V 5mS/div
IC401 20pinIC401 21pinIC401 40pinQ605 COthers:As specified
:OthersSweeping time is
specified
2Vp-p(H)2Vp-p(H)1Vp-p(H)450Vp-p(H)(5)Voltage values:All DC voltage values
Since the voltage values of signal circuit vary to some extent 4.NOTE FOR REPAIRING SERVICE
according to adjustments, use them as reference values.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.
3.INDICATIONS ON THE CIRCUIT DIAGRAM
(1)Resistors(1)Do not touch the LIVE side GND or the LIVE side GND and the
Resistance value ISOLATED(NEUTRAL) side GND simultaneously. If the above
caution is not respected, an electric shock may be caused.
No unit:[]
Therefore, make sure that the power cord is surely removed from
IC401 47pinIC701 1pinIC701 9pinIC501 34pinK:[K] the receptacle when, for example, the chassis is pulled out.
M:[M ]
(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL)
0.6Vp-p(V)4.8Vp-p(V)0.5Vp-p(V)1.2Vp-pType side GND or never measure with a measuring apparatus measure
with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND
No indication:Carbon resistor
and ISOLATED(NEUTRAL) side GND at the same time.
OMR:Oxide metal film resistor
If the above precaution is not respected , a fuse or any parts will be broken.
MFR:Metal film resistor
Since the circuit diagram is a standard one, the circuit and
MPR:Metal plate resistor
circuit constants may be subject to change for improvement
UNFR:Uninflammable resistorwithout any notice.
FR:Fusible resistor
NOTE
Composition resistor 1/2 [W] is specified as 1/2S or Comp.Due improvement in performance, some part numbers show
(2)Capacitorsin th e circuit diagram may not agree with those indicated in
CRT SOCKET PWBthe part list.
Capacitance value
When ordering parts, please use the numbers that appear
1 or higher:[pF]
IC901 7pinIC901 8pinIC901 9pinin the Parts List.
less than 1:[?F]
35Vp-p(H)35Vp-p(H)35Vp-p(H)
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ACEC
