Daewoo DTD-25G1 ME, Service Manual

Page: 47 / 54

- 12 -
APPENDIX
PIN NAME FUNCTION INTERFACE
47 LOOP FILTER A terminal to be connected with loop filter for
PIF PLL.
The terminal voltage controls the PIF VCO
frequency.
48 EHT IN The input terminal for EHT.
The ratio of EW/V is controlled by bus.
49 De-Emphasis A terminal to De-Emphasis Audio signal, and
/Mon-OUT pick up detected Audio signal. Connect
capacitor (0.01 F to GND).
The time constant 50/75us is set by the
IICBUS control “SIF Freq”.
Remove the capacitor in case of us US/JPN
sound multiplex system.
50 PIF TANK Terminals to connect a PIF tank coil.
51 The tank coil should be pre-set /- 2%
for the automatic tuning. Manual tuning is
also available.
The resonance capacitance of the tank should
be 18pF.
47
1
5
1k
1k
5V
1.5k
500
48
31
13k 13k
3.5V
49
14
5
15k 7.5k 500
50
51
1
5
IC DESCRIPTION