Agc And Delay Adjustment - Sony DSR-300 Service Manual

8-3-3. AGC and Delay Adjustment

Note: Be sure to perform this adjustment when the
RP-91 board is repaired and AEQ (IC775) or
EEPROM (IC770) on the RP-91 board is
replaced.
Be sure not to perform this adjustment when
replacing the RP-91 board.
1. Set the unit in maintenance menu, and select Menu No.
702.
(1) While pressing the SHIFT button, press the MENU
button, then release the SHIFT button, and press the
MENU button for more than one second.
The following message is displayed on the LCD screen.
(In the following description, an underlined part
indicates a portion of the display which is blinking.)
(2) Press the RESET (MENU SET) button once so that
"oFF" blinks.
The following message is displayed on the LCD screen.
Each time the RESET (MENU SET) button is pressed,
"600" and "oFF" will be blink alternately.
(3) Press the ADVANCE button once, and select "on."
The following message is displayed on the LCD screen.
Each time the ADVANCE button is pressed, "on" and
"oFF" will blink alternately.
(4) Press the RESET (MENU SET) button once.
The following message is displayed on the LCD screen.
Each time the RESET (MENU SET) button is pressed,
"600" and "on" will blink alternately.
DSR-300/P(E)/V1
(5) Press the ADVANCE button several times and display
Menu No. 702.
The following message is displayed on the LCD screen.
2. Press the RESET (MENU SET) button.
3. Load a blank tape, and wait a while (10 minutes or
less).
4. Eject the blank tape.
5. Check that the following message is displayed on the
LCD screen:
If the following message is displayed on the LCD
screen, exit Menu No. 702 and perform from step 1
again.
If the following message is still shown on the LCD
screen, check the replaced IC and/or adjacent circuitry.
X X:40→ Cannot EQ adjust
41→ Fault detected when error rate was checked
after adjustment
42→ Could not record time required for
adjustment or check
43→ Could not find starting point of recording
44→ Cannot AGC LEVEL adjust
45→ Cannot CLOCK DELAY adjust
E0→ Cannot save data
Fb→ Operation mode changed during adjustment
or check. Or could not record
Fc→ Error occurred during adjustment or check
Fd→ Menu not supported
FE→ Adjustment prohibited (Ex.:Tape is
inserted)
Note: Because the recording in the special mode is
performed during adjustments, the tape used
in this adjustment cannot be played back
properly.
6. Press the MENU button, and exit the maintenance
menu.
The state before the maintenance menu indication will
be displayed on the LCD screen.
8-7