Electrical Adjustment For Aj-Bs900Hen & Ca900Hen; Bs Power, Bs Audio; Power Voltage Adjustment; Osc Frequency Adjustment - Panasonic DVCPRO AJ-CA901P Service Manual

Electrical Adjustment for AJ-BS900HEN & CA900HEN

6. BS POWER, BS AUDIO

6-1. Power Voltage Adjustment

BOARD BS POWER, BS AUDIO
1671
TP VFK A10 pin, GND : A78pin
ADJ. VR1 [V ADJ] (BS POWER UNIT)
INPUT ------
M. EQ D.V.M
SPEC. 5.0V +/- 0.05V
1. Extend BS AUDIO Board with Extension Board
(VFK1671).
2. Connect D.V.M to A10pin on the VFK1671 and then
adjust VR1 so that
specification.

6-2. OSC Frequency Adjustment

BOARD BS AUDIO
TP VFK1671 : B58 pin
ADJ. X1, VR16 [27∅], VR18 [SC LVL]
INPUT
------
M. EQ Frequency counter, Oscilloscope
SPEC. A = 4.43361875MHz +/- 5Hz
B = 1.0Vp-p +/- 1% (0.01V)
1. Set VR16 to center position.
2. Extend BS AUDIO Board with Extension Board
(VFK1671).
3. Connect Frequency counter to B58pin on the
VFK1671 and then adjust X1 so that the frequency
A is within the specification.
4. Connect Oscilloscope to B58pin on the VFK1671
and then adjust VR18 so that the signal level B is
within the specification.

6-3. RGB Output Level Adjustment

BOARD BS DIGITAL
TP Y/G OUT, PR/R OUT, PB/B OUT
ADJ.
VR5 [Y/G GAIN], VR6 [PR/R GAIN],
VR7 [PB/B GAIN] (with 75Ω termination)
INPUT AJ-BS900H Internal Color bar signal : ON
M. EQ Oscilloscope
SPEC.
As shown below
1. Set SW2-1pin on the BS DIGITAL Board to OFF.
(Y/C → R, G, B output mode)
voltage is within the
ELE-13
BS DIGITAL BOARD
2. Connect Oscilloscope to Y/G OUT and then adjust
VR5 so that the signal level A is 700mV +/- 1%.
3. Connect Oscilloscope to PR/R OUT and then
adjust VR6 so that the signal level B is 525mV +/-
1%.
4. Connect Oscilloscope to PB/B OUT and then adjust
VR7 so that the signal level C is 525mV +/- 1%.
SW2
8
7
6
5
4
3
2
1
ON OFF
A
B
C