Sony VPH-G90E, Service Manual

Page: 173 / 546

3-3 VPH-G90E/G90U/G90M
3-4. FOCUS ADJUSTMENT
3-4-1. Preparations
1. Turn ON the MAIN POWER SW, and press the
POWER ON key to turn on the power.
2. Press the NORMAL key.
3. Continue pressing the keys as follows.
ENTER key
8
ENTER key
8
↑
key
8
↓
key
8
ENTER key
8
4. Select “YES” on the screen with
↑
and
↓
keys, then
press the ENTER key.
5. Press the MENU key. “S” is displayed on the screen
and the serviceman adjusting mode is set.
6. Keep pressing the RESET key for five seconds.
7. Select “YES” on the screen with
↑
and
↓
keys, then
press the ENTER key.
8. Select “ALL MEMORY” on the screen with
↑
and
↓
keys, then press the ENTER key.
9. Select “FACTORY DATA” on the screen with
↑
and
↓
keys, then press the ENTER key.
With the above procedure, the same state as that at the
time of factory shipment can be set for the unit, and
adjustment can be made for the replaced color.
10. Set INPUT-A to the no-signal state, then select INPUT-
A.
11. Select the INT OSC PATTERN from INT. OSC menu
with the MENU key, then select P5 (fH = 64 kHz, fV =
60 Hz).
3-4-2. Focus Rough Adjustment
1. Set INPUT-A to the no-signal state, then select INPUT-
A.
2. Select the ME pattern, as test pattern, with the
PATTERN key.
3. Cut off the colors other than the one to be adjusted with
the CUT OFF key and set a single color. Then adjust
the lens focus roughly.
4. Press the MG FOCUS key to set the MG FOCUS
adjustment mode, then select the ME pattern with the
PATTERN key.
5. Press the ALL key to adjust the center focus of R, G
and B roughly.
6. Repeat Steps 3 to 5 until the best center focus is
attained.