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Excellent service, and just what I needed to service my TU-7700. All pages of the manual are clear and easily readable.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
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We received the manual in a timely manner and it was exactly what we were expecting. Excellent replacement for original Service Manual.
All schematics are very legible. We are really satisfied.
;
We received the manual in a timely manner and it was exactly what we were expecting. Excellent replacement for original Service Manual.
All schematics are very legible. We are really satisfied.
;
We received the manual in a timely manner and it was exactly what we were expecting. Excellent replacement for original Service Manual.
All schematics are very legible. We are really satisfied.
CIRCUIT DESCRIPTION
TUNING VOLTAGE GENERATOR
BT BS TU H/L 1 16 BU
VREF Vcc
VCC6
IC500 MSC1169MS-K GND U/V 8 9 VH2 H/L R502 R501 R500 6 11 VH1 TU 7 10 VL1 IN 4 13 VL2 OUT 5 12 U1 BS 2 15
3 14 U2 BT
VREF
GND Figure 1 This circuit generates the DC tuning voltage BT for selecting a channel with a TU pulse being output from IC700. IC500 has 3 circuits for converting pulses to voltages; it selects one of VHF-L, VHF-H, or UHF, and causes the tuning voltage to be output from the OUT terminal (pin 12). Figure 2 and Table 1 show the conditions for selection. IC500 Inputs
VHF -L 11 VHF -H 12
Function U/V L L H H H/L L H L H VHF-L receiving VHF-H receiving UHF receiving UHF receiving
TU
OUT(BT)
UHF
9
10
Table 1
U/V H/L
Figure 2
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