Table of Contents
Advertisement
DEFLECTION TROUBLESHOOTING (DRIVE SIGNAL COMPARISON)
The output from IHOl Pin 12 is then routed to IH02
HORIZONTAL
POWER SUPPLY GENERA-
Pin 10. Internally a signal is produced that actually
TION CIRCUIT
EXPLANATION:
drives the High Voltage Horizontal Output transistor.
It is important to remember that the Power Supply also
The output waveform is produced at Pin 7
plays a roll in the deflection circuit. A HVcc switch is
i.oov
2
2oov
yo .oos 10 .og/
used in the power supply, QP09. QP09s emitter is sup-
I
An plied with A12V. When the Power ON command is
tH02
Pin 7
l--u-
PDDl
Connector
Pin 7
(H. DRIVE)
:
I
'"
I
generated from 1001 pin 55 (high), the power on driver
1 1
I
Q007 is turned on. A LOW is produced at it's collector
0 0
I
and routed through the PQSl connector pin 3. This
I
I
low is then routed to the PQD2 connector pin 5 to the
l
0
:
; b=4.4"5
base of QP08, turning it ON and supplying 12V to the
connector PDDl pin 1 and 2. This 12V then is routed
P-J-L
-
E-l
1 Drive signal used in the comparisons above.
to 1702 pin 1,1701 pin 1 and 1703 pin 8 on the sub de-
flection PWB. This IC in turn generates the Horizontal
I-
,
;-------------*---*-------------------------------*-------------
I
1
____________________________________
1
_____________________
SIGNAL PWB
SUB POWER PWB
P&l
PQb2
PDbl
I
._t___________.__*r_______1__1111______9-*-*-----------------------------
-
l-l
I
I
I
I
DEFLECTION
SUB DEFLECTION
PWB
Figure 21
PAGE
02-I
2
Advertisement
Table of Contents
