Pioneer PDP-503CMX Product Training Manual page 141

Timing Adjustment of X and Y DRIVE Assys Control Signal
Adjustment Method
CR delay circuit is each inserted on signal path of four control signals (SUS-U, SUS-B, SUS-D, SUS-G) driving
the pulse module.
Quantity of delay can adjust pulse module of one side with VR.
Adjust VR while measuring the waveform of the pulse module, and match timing.
Adjustment VR
X DRIVE Y DRIVE
SUS-U VR3203
SUS-D VR3202
SUS-B VR3201
SUS-G VR3200
Adjustment Procedure
Power ON
Black Mask Screen
Display a SUSOUT waveform
Coarse adjustment of
SUS-U, SUS-B, SUS-G
Display a SUS-D waveform
SUS-D adjustment
Adjust the waveform to 20-25ns.
Display a SUS-U waveform
SUS-U adjustment
Adjust the waveform to 20-25ns.
Power OFF
Adjust VR resistance value
of SUS-B and SUS-G to match
VR resistance value of SUS-D
within ± 2Ω.
VR2204
VR2203
VR2202
VR2201
Measuring points of waveform
are refered to next page.
PDP-503CMX, PDA-5002
Test pin for adjustment and measurment
Pulse Module X DRIVE
Upper
SUSOUT K3105
SUS-U K3200
SUS-D K3108
Power ON and
display a SUS-D waveform
SUS-D readjustment
Adjust the waveform to 20-25ns.
Display a SUS-U waveform
SUS-U readjustment
Adjust the waveform to 20-25ns.
Power OFF
Adjust VR resistance value
of SUS-B and SUS-G to match
VR resistance value of SUS-D
within ± 2Ω.
Power ON and display a SUSOUT
waveform
No
Compare waveform,
and do harmonize
almost?
Yes
Adjustment end
Y DRIVE
Lower Upper Lower
K3106 K2212 K2203
K3204 K2220 K2224
K3205 K2207 K2225
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