XR-1800R
5-3. SCHEMATIC DIAGRAM  MAIN Section (1/2)  " See page 18 for Waveforms. " See page 29 for IC Block Diagrams.
 21   22 
XR-1800R
5-4. SCHEMATIC DIAGRAM  MAIN Section (2/2)  " See page 18 for Waveforms. " See page 29 for IC Block Diagrams.
(Page 27)
 23   24 
XR-1800R
5-5. PRINTED WIRING BOARD  PANEL Section 
(Page 19)
" Semiconductor
Location
Ref. No. Location
D900 B-5
D901 B-5
D902 B-5
D903 B-5
D904 A-5
IC900 A-6
 25   26 
XR-1800R
5-6. SCHEMATIC DIAGRAM  PANEL Section  " See page 18 for Waveform.
(Page 24)
 27   28 
" IC Block Diagrams
 MAIN Board 
IC121 LC7216M
20 19 18 17 16 15 14 13 12 11
PHASE DETECTOR
1/2
CHARGE PUMP
UNIVERSAL
COUNTER
SWALLOW 12BIT
REFERENCE
COUNTER PROGRAMMABLE
DIVIDER
1/16, 1/17 4BIT DIVIDER
SHIFT REGISTER LATCH
1 2 3 4 5 6 7 8 9 10
IC150 TDA7330BD-013TR
20 19 18 17 16 15 14 13 12 11
PHASE DIFF
COSTAS
2nd ORDER 8th ORDER
+ DECODER DECODER
LOOP
ANTIALIAS SC-BANDPASS
 PLL
FILTER FILTER
57kHz
CLOCK
RECOVERY
PLL
1.4675kHz
TEST LOGIC
ON/OFF
VCC
OSCILLATOR
fx DIVIDER
1 2 3 4 5 6 7 8 9 10
 29 
X OUT
VSS
PD
VDD
FMIN
AMIN
HCTR
LCTR
OUT5
OUT4
DI
CE
CL
DO
IN 0
IN 1
X IN
OUT1
OUT2
OUT3
POR
TM
FSEL
T7
VCC
ARI
OUAL
RODA
ROCL
T57
T1
T3
T4
GND
CMP
VREF
OSCIN
MPXIN
FILOUT
OSCOUT
LT3 RT3
LT2 RT2
LT1
RT1
LIN RIN
L10dBOUT R10dBOUT
LCT2 RCT2
LCT1
RCT1
L10dBIN R10dBIN
LSELO RSELO
L3 R3
NC NC
RROUT
IC450
LC75372E
LROUT 41
RFOUT
RVREF 38
LFOUT 42
LVREF 40
ROUT 34
LOUT 44
VREF
RFIN 35
LFIN 43
39
37
36
33
32
31
30
29
1
2
3
4
5
RVREF
LVREF
RVREF
LVREF
RVREF
LVREF
RVREF
LVREF
LATCH
DECODER

+

+
28
27
26 25
24 23
6
7
8
9
10 11
 30 
RVREF
LVREF
REGISTER
SHIFT
RVREF
RVREF
RVREF
LVREF
LVREF
LVREF
CONTROL
16
15
CE
13 L1
14
17
19
VSS
20
TEST
12 L2
18
NC
21
R1
22 R2
DI
VDD
CL
+

+

+

+

+

+