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REPAIR PROCEDURES OF THE HORIZONTAL
OSCILLATOR DISABLE CIRCUIT (Fig. 2)
1. Connect a DC vOltage between capacitor C604Q ::t) on the
E-P.C. board and chass.is ground. If nearly 23V is not
present on that point find the cause. Check R6069.
D6022,
C6040, R6D68, R6D66 and R6067,
2. Connect the
+
side 01 DC voltmeter to collector of 06025
and the
-
side to TPE5 (GND). The collector of 06025
potential varies
Irom nearly 11 V \0 nearly
0.1 V when shor-
ling R6D68. If this does not occur, check C6038, C6037 ,
Q6020, R6063. 06024, R6060, Q6021 , R6062, R6064,
.ADJUSTMENT PROCEDURE OF THE HORIZONTAL
OSCILLATOR DISABLE CIRCUIT
.
..
.
Replace
R6066
(Protector
2 Adj.)
and
R6045
(HV
Adj.)
before
.
.
this adjustment. R6066 (Protector 2 Adj.) and R6045 (HV Adj.)
are
in~nulactures specified parts only.
1. 8et the following
controls at the positions indicated.
Input Signal Selector SW (87408)
LlNE
R6045 (HV Adj.)
""""""""""""Fully
Counter-clockwise
R6066 (Pro/ector 2 Adj.)
""""""Fully
Counter-clockwise
Connect the + (positive) side
or DC voltmeter to TPE1 and
-
(negalive)
side to TPE2 on
E-P.C. board.
2. Connect the high voltage meter to anode
lead of the
distributer as shown in Fig. 3.
06025.
C6042.
R6065.
06028,
R6078.
06027.
C6043.
Q6022.
R6071.
R6073.
R6072,
C6044.
Q6023,
Q6024.
.
D6026. R6D70. D6O29, R6074.R6075,C6045. R6061,and
Q6025.
3. .Carefully check above specified parts related circuits and
parIs. When the circuit is repaired. try 1he Horizontal
Oscillator Disable Test again.
4. In case that at least one of R6066, R6067, R6068, D6024
and FBT is replaced. follow Adjustment Procedure of
Horizontal Oscillator Disable Circuit as follows.
Turn
on the Power Switch. and receive a window pattern
signal.
Connect
a short jumper
between
TPE6 and TEPS and
C6046 both side.
Adjust R6045 (HV Adj.) the Brightness
control and the
Contrast control
to
obtain (34kV:tO.3kV) on the high voltage
meier, and obtain
(1
.9V.:!:O.1V) on the voltage meter.
3.
4.
5.
CA UTION:
Use only
a Stalic Type 01 High Voltage MeIer whicJ1 has a
5% tolerence at 40kV-
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