Op74: Reserved (Value = 0); Op75: Reserved (Value = 0) - Philips 7603 series Service Manual

• OP74: Reserved
Default setting : 0.
• OP75: Reserved
Default setting : 0.
• OP77 and 76: TIME_WIN1, TIME_WIN2
00 :The time window is set to 1.2s
01 : The time window is set to 2s
10 : The time window is set to 5s
11 : not in use
Default setting : 01
Note :The time-out for all digit entries depend on this setting.
Tuner
Note: Described alignments are only necessary when the NVM (item 7602) is replaced.
IF PLL
This adjustment is auto-aligned. Therefore, no action is required.
AFW (AFC window)
Fixed value is OFF.
AGC (AGC take over point)
Set the external pattern generator to a color bar video signal and connect the RF output to aerial input. Set amplitude to 10
mV and set frequency to 61.25 MHz (channel 3).
Connect a DC multimeter to pin 1 of the tuner (item 1000 on the main panel).
1. Activate the SAM.
2. Go to the TUNER sub menu.
3. Select AFW with the UP/DOWN cursor keys and set to ON.
4. Select AGC with the UP/DOWN cursor keys.
5. Adjust the AGC-value (default value is 27) with the LEFT/RIGHT cursor keys until the voltage at pin 1 of the tuner lies
between 3.8 and 2.3 V.
6. Select AFW with the UP/DOWN cursor keys and set to OFF.
7. Switch the set to STANDBY.
YD (Y-delay adjustment)
Always set to 3.
CL (Cathode drive level)
Always set to 4.