Hitachi 32PD5000 Service Manual page 21

Item AGC ADJUSTMENT
Applicable Model
Preparation
(1) Keep heat-run for 5 minutes or more.
(2) Receive the adjustment signal at ANT terminal.
Signal condition
CCIR ch-5 (175.25MHz)
PAL B/G Philips Pattern
Input Field Strength: -50dBm
32PD5000/42PD5000 (PW1)
42PD5000TA, 32PD5000TA
Procedure
(1) Enter the service adjustment mode, and indicate
No.289 (AGC Adjustment) and No.291 (AGC Input).
(2) Increase the data of No.289 until the data of No.291
converges. (This is the point of AGC-MAX.)
(3) Decrease the data of No.289 until the data of
No.291 diminishes, and then press the OK button.
AGC Voltage
AGC Max.
AGC
Adj. point
21
AGC POINT