Block Diagram Of Digital Synthesizer - JVC Super-A R-S77 Service Manual

Block Diagram of Digital Synthesizer
EM EM 1C303 uPB553C F.L. Display
Tuning osc
Woltege Freq. | ECL 1/16. 1/17
Presealer
Li 1%
AM OSC Devided FM
Freq. OSC Freq.
-=
AM . liramere
Tuning counter
Voltage
4.5 MHz
SS X'tal
Resonator
ee ee ee ee Quatre
Programed in osc
FM 6 + last CH Micro Computer Freq.
AM 6 + last CH
Memory
CH1 —6 key 1C302 uPD1703-011 :
Memory key Fig. 10
7. Pin-plug to Pin-jack Connections Diagram
TXX-267-6
Speaker Terminal
P.C. Board Ass'y
TXX-267-2
Power Supply
P.C. Board Ass'y
(See page 10) —_ i902 (See page 10)
——|
vin TXX-268-2
J801| Pin-jack
Power Transformer P.C. Board Ass'y
See page 24 reo1( A — (See page 13)
| f l fl fl f l l | l | =
TXX-267-1
104 P103
TFM-924
Main Amp. P.C. Board Ass''y
(See page 10)
FM/AM Tuner
P.C. Board Ass'y
Speaker & STAND-BY Switch
P.C. Board Ass'y
So
Equalizer & Switch
P.C. Board Ass'y
R-S77
No.2520
(See page 11) — (See page 13)
TXX-268-3
SEA P.C. Board Ass'y TAP-283 _
(See page 14)
SEA Control
P.C. Board Ass''y (a sama A
(See page 17) fF
Connectors Table
TX X-269-1
Ral TO Bi <a Logic & Counter
In-piug Location iso Location P.C. Board Ass'y
Sone! abeereie) (See page 16)P803
P101 TFM-924 J101 TXX-269-1
P102 TFM-924 J102 TXX-269-1
P103 TFM-924 J103 TXX-269-1
P104 TFM-924 J104 TXX-268-1 +TXXD685
P201 TFM-924 J201 TXX-269-1 Seco :
P301
TXX-269-1 | J301
TXX-268-5
ee. Heer eee
P302 TXX-269-1 | J302 TXX-267-2 ee page Fig. 11
P501 TAP-283 | J501 TXX-268-5 .
P701 TXX-267-1 | J701 TX X-268-3
P801 TXX-267-2 | J801 TXX-268-1
P802 TXX-267-1 | J802 TXX-268-3
P803 TXX-367-1 | J803 TXX-268-1