Sony PDW-HD1500 Maintenance Manual page 136

HD Free-Running Frequency Adjustment
1. Set an oscilloscope as follows:
CH-2: DC 2 V/DIV
TIME: 100 us/DIV
2. Display the adjustment item referring to Section 8-1-3.
3. Select "A23: CP VR" rotating the [PUSH|SET]
knob, and press the [SELECT] button.
4. Select "HD 74 MHz VCO" rotating the [PUSH|SET]
knob, and press the [SELECT] button.
The HD 74 MHz VCO ADJUST menu appears.
MAINTENANCE MENU
HD 74MHz VCO ADJUST
preset : 80H
86(HEX)
INC/DEC : CTRL.KNOB
TO MENU : MENU KEY
5. Perform the adjustment by rotating the [PUSH|SET]
knob so that a frequency counter reading satisfies the
specification.
Measurement Point: TP3101/HPR-23 board (C-7)
74.1758 ± 0.0001 MHz
Specification:
6. Press the [MENU] button to return to the MENU
screen.
7. Press the [RETURN] button.
8. Select "A2F: NV-RAM CONTROL" rotating the
[PUSH|SET] knob, and press the [SELECT] button.
MAINTENANCE MENU
M1:ADJUST
A2:AUDIO/VIDEO/BATTERY
A20:VPR VR
A23:CP VR
A27:APR VR
A2E:BATTERY
A2F;NV-RAM CONTROL
9. Select "SAVE ALL ADJUST DATA" rotating the
[PUSH|SET] knob, and press the [SET] button to
save the adjustment data.
MAINTENANCE MENU
NV-RAM CONTROL
NO OPERATION
SAVE ALL ADJUST DATA
ALL DATA PREVIOUS
EXECUTE: SET KEY
TO MENU: MENU KEY
10. Amend "013: SYSTEM FREQ" to "1080/50i" by
referring to "Preparations" paragraph of step 5.
8-2
11. Select "A23: CP VR" rotating the [PUSH|SET]
knob, and press the [SELECT] button.
12. Select "HD 74MHz VCO" rotating the [PUSH|SET]
knob, and press the [SELECT] button.
The HD 74 MHz VCO ADJUST menu appears.
13. Perform the adjustment by rotating the [PUSH|SET]
knob so that a frequency counter reading satisfies the
specification.
Measurement Point: TP3101/HPR-23 board (C-7)
74.2500 ± 0.0001 MHz
Specification:
14. Press the [MENU] button to return to the MENU
screen.
15. Press the [RETURN] button.
16. Select "A2F: NV-RAM CONTROL" rotating the
[PUSH|SET] knob, and press the [SELECT] button.
17 Select "SAVE ALL ADJUST DATA" rotating the
[PUSH|SET] knob, and press the [SET] button to
save the adjustment data.
18. Amend "013: SYSTEM FREQ" to the customer's
setups by referring to "Preparations" paragraph of step
5.
J H G F
TP2608
TP2606
TP2601
TP2604
TP2603
TP2607
TP2203 TP2201
TP2204
TP2202
HPR-23 board (side B)
E D C B A
TP3103
TP3202
TP3201
TP3206
TP3204
TP802
TP803
TP801
TP1602
TP1601
TP3104
TP3101
PDW-HD1500/V1 (E)
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