Deflection - Pioneer SD-533HD5 Training Manual

2. P.D. (2)
Failure in the DEFLECTION SERVICE Assy.
There are four main possibilities:
1. Overload detection
2. H. deflection stopping detection
3. X-ray protection
Status Causes
It checks whether the parts of the account of the right
D503
Overload detection
have broken.
ANODE Hi
Is the connector of the deflection yoke plugged in?
D512
Stopping H. deflection
No HDRV signal at R548
ANODE Hi
No DH. BLK signal at D506 (Cathode)
No change in the ABL voltage (no DC change) at Pin 6 of
the CN1401 when a 100%-white signal is repeatedly
D613
X-ray protection
connected and disconnected
ANODE Hi
Check that the connector (D3) from the POWER
SUPPLY Assy is plugged in to the DEFLECTION
SERVICE Assy.
Check that the connector (S6) from the SIGNAL Assy is
plugged in to the DEFLECTION SERVICE Assy.
D807
V. deflection stopping
ANODE Hi Abnormality in V. BLK 2 waveform that is output from Pin
4 of the CN2303 in the SIGNAL Assy (too long a high
period with the DC voltage on)
Abnormality in V. DRV waveform that is output from Pin
8 of the CN2806 in the SIGNAL Assy (too long a high
period with the DC voltage on)
No waveform is output from Pin 4 of the CN505.
Note: The anode of the diode is high only for a short time after the power is turned on until the protection circuits are activated (P.D.)
The LEDs are lit by the HOLD circuit.
Note that the power may be shut down when the voltages 120V, 21V, 15V, -20V, 5V and STB5V from the POWER SUPPLY Assy are not
supplied because the DEFLECTION SERVICE Assy is powered by the POWER SUPPLY Assy.
When overload detection mechanism is activated, the 120 V line is short-circuited. If the power switch is set to ON again in this condition,
there may be a case where the power cannot be turned on, with just a whining sound, and where only the D107 LED in the POWER
SUPPLY Assy is lit. If this happens, first replace only the DEFLECTION SERVICE Assy, disconnect the AC cord from the AC outlet or
turn the main power switch OFF, and wait for five minutes. Then, turn on the power again. If the condition is ameliorated, only the
DEFLECTION SERVICE Assy is defective. If the same symptom occurs, replace the POWER SUPPLY Assy. In the latter case, the
DEFLECTION SERVICE Assy may not be defective.
Be sure to check the fuses in the POWER SUPPLY Assy because one or more may be blown as a result of short-circuiting of the load circuit
of the DEFLECTION SERVICE Assy.
If the FU302 and FU303 fuses are blown, see the following table:
Causes
Check that waveform signals are output from Pin 3 and Pin 1
Too high loading on the CONVER. AMP of the CN401, CN402 and CN403, and that the DC element is
not added to the signals.
Check that the electric potential of Pin 3 and Pin 4 of IC401
CONVER. MUTING not activated
and IC402 are at the same level when the power is turned on.
Check Items Probable Defective Parts
Q603 (short-circuited between D and S)
Q511 (short-circuited between C and E)
Q1001, Q1002, Q1051, Q1052, Q1101,
Q1102 (CRT DRIVE Assy) Short
D605 (short-circuited)
Plug in the connector.
IC1902 (VIDEO IP SERVICE Assy)
Q508, Q511
D1914 (short-circuited) of the VIDEO IP
SERVICE Assy
T601 (FBT) rare short
Plug in the connectors.
Plug in the connectors.
IC2401 (SIGNAL Assy)
IC1902 (VIDEO IP SERVICE Assy)
IC802
Check Items Probable Defective Parts
IC401, IC402
Q404, Q402
50.