Sony BKDS-PA3291, Руководство по обслуживанию

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4-5(E)
BVS-A3232
4-2-1. Crosspoint Phase Adjustment
[Equipment Required]
• Test signal generator (Sony Tektronix 1410 or equivalent; For U.S.A. and Canada area)
(Sony Tektronix 1411 or equivalent; For Europe area)
• Oscilloscope
• Probe
• Extension board (EX-351, Sony part No. : J-6185-310-A)
4-2-2. Buzzer Volume Adjustment
[Equipment Required]
• Oscilloscope
• Probe
• Extension board (EX-351, Part No. : J-6185-310-A)
4-2. CPU-94 Board
Adjustment Conditions
• Extend the CPU-94 board using the
extension board (EX-351).
• Set the switch S1-1 (A-8) on the CPU-94
board to the SYNC position.
• Set the switch S4 (G-2) on the CPU-94
board to “1”.
• Oscilloscope settings
CH1 : DC 0.5V/DIV
CH2 : DC 2V/DIV
TIME : 10
µ
s/DIV
TRIG : CH1/TV-FLD1 mode
Specification
Measurement Point: TP9 (J-1) on CPU-94
Spec. ; A = 21.0
±
0.2
µ
s
• Adjust RV2 so that the timing from the rise up
of the 2nd H satisfies specification A.
Adjustment Point
1 RV2 (L-1) on CPU-94
Adjustment Conditions
Step 1
• Extend the CPU-94 board using the
extension board (EX-351).
• Set S7 (A-5) on CPU-94 to F and press
S2 (A-11) on CPU-94.
• Check that the buzzer BZ1 (G-1) on the
CPU-94 board sounds.
• Connect CH1 of an oscilloscope to TP1
(E-2) on the CPU-94 board.
• Oscilloscope settings
CH1 : DC 2 V/DIV
TIME : 1 ms/DIV
TRIG : CH1 AUTO
Step 2
• Install the CPU-94 board removed in
step 1.
Specification
Measurement Point: TP1 (E-2) on CPU-94
Spec. ; A = 4.4
±
0.4 V
• Adjust RV3 to satisfy specification A.
Adjustment Point
1 RV3 (F-2) on CPU-94
REF (CH1)
1H 2H
A
ODD FIELD
(FLD1)
TP9 (CH2)
A
CH1
(TP1)