Teac EU-34HT, Service Manual

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13
FOA FOB Ø1-loop mode
0 0 Auto,
Ø
1-gating in slow mode (Note a)
0 1 Slow, always gating
1 0 Slow/fast depends on noise detector, always gating
1 1 Fast, no gating
Note a:
Not suitable for weak video recorder signals, because of active Ö1-gating in the slow mode. Use FOA, FOB =1,1 instead.
Note 2:
Xa, Xb
0,1 : PAL M, Pal N, NTSC M
Pin 34 : 3.58 (1, 2 or 3 crystals)
Pin 35 : No crystal
1,0 : PAL B/G, PAL D/K, Pal I/I+, SECAM B/G, SECAM D/K, SECAM L/L’, SECAM K1
Pin 34 : No crystal
Pin 35 : 4.43 (1 Crystal)
1,1 : PAL B/G, PAL D/K, Pal I/I+, SECAM B/G, SECAM D/K, SECAM
L/L’, SECAM K1, PAL M, PAL N, NTSC M
Pin 34 : 3.58 (1, 2 or 3 Crystals)
Pin 35 : 4.43 (1 Crystal)
OPTION 01
B7B6B5B4B3B2B1B0
B7 = Forf : 0 (Note 1)
B6 = Fors : 0 (Note 1)
B5 = DL : X (De-interlace: 0= Interlace, 1= De-interlace) (don’ t care)
B4 = STB : X (Stand-by) (0= TDA884X in standby mode, 1= IC
operational) (don’ t care)
B3 = Poc : X (Synchronisation mode: 0=Synchronization active,
1=Synchronisation not active) (don’ t care)
B2 = Cm2 : X (Note2) (don’ t care)
B1 = Cm1 : X (Note2) (don’ t care)
B0 = Cm0 : X (Note2) (don’ t care)
Note1:
Forf, Fors bits: Forced field frequency: This forces the vertical divider in a 60 Hz mode or automatic. In auto mode it can be
given a preference for 50 or 60 Hz or to keep the last detected field frequency.
FORF FORS Vertical Frequency
0 0 Auto, 60 Hz if not locked
0 1 60 Hz forced (Note b)
1 0 Auto, keep last detected frequency
1 1 Auto, 50 Hz if not locked
Note b: When already locked at 50 Hz, 60 Hz is forced after sync loss.
Note2:
Cm2, Cm1, Cm0 bits: Colour Decoder Mode: With these bits the automatic mode can be selected or the decoder can be forced
to one of the standards. Xtal selection bits XA and XB should not be contradictory to a forced Xtal selection in the colour decoder
mode (e.g. force pin 35 while there is only a Xtal on pin 34).
CM2 CM1 CM0 Colour Decoder Mode
0 0 0 Automatic, own intelligence, 2 Xtals
0 0 1 Forced Xtal pin 34, PAL/NTSC
0 1 0 Forced Xtal pin 34, PAL
0 1 1 Forced Xtal pin 34, NTSC
1 0 0 Forced Xtal pin 35, PAL/NTSC (Note c)
1 0 1 Forced Xtal pin 35, PAL
1 1 0 Forced Xtal pin 35, NTSC
1 1 1 Forced Xtal pin 35, SECAM
Note c: In this mode, the colour oscillator is forced to use one Xtal pin, while the decoder can select PAL or NTSC automatically.
OPTION 02
B7B6B5B4B3B2B1B0
B7 = Oso : 0 (Over-scan Switch-Off: 0= Switch-off undefined,
1= Switch-off in vertical overscan)
B6 = Vsd : 0 (Vertical Scan Disable: 0=Active Vertical Scan,
1= Disable Vertical Scan)
B5 = Cb : 0 (Chroma Band pass center frequency: 0= Centre frequency at
Fsc (chroma sub-carrier frequency), 1= Center frequency at 1.1*Fsc)
B4 = Bls : 0 (Blue Stretch: 0= Blue Stretch off, 1= Blue Stretch on)
B3 = Bks : 0 (Black Stretch: 0= Black Stretch off, 1= Black Stretch on)
B2 = Ie1 : X (Insertion Enable Fast blanking: 1= enable RGB insertion,
0= disable) (don’ t care)
B1 = Afw : X (AFC Window around IF center frequency: 0= Nominal
window, about 80 kHz wide; 1= Enlarged window, about 240 kHz
wide) (don’ t care)
B0= Bb : 0 (Blue Background: 0= Normal operation, 1= Blue background active)