CDX-1150
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
US Model
For schematic diagrams
" All capacitors are in �F unless otherwise noted. pF: ��F
50 WV or less are not indicated except for electrolytics
and tantalums.
SERVICE MANUAL
" All resistors are in &! and 1/4 W or less unless otherwise
specified.
" % : indicates tolerance.
" ó
: internal component.
" C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
SUPPLEMENT-1
" U : B+ Line.
File this supplement with the service manual.
" Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
" Voltages are taken with a VOM (Input impedance 10 M&!).
Subject : Change of Main and Key Boards
Voltage variations may be noted due to normal produc-
(ECN-CSB00629) tion tolerances.
" Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
When performing service and inspection, check the suffix of the part number of tion tolerances.
" Circled numbers refer to waveforms.
the main and key boards.
" Signal path.
F : FM
f : AM
J : CD
" (( )) : Page of supplement-1.
 MAIN BOARD (SIDE B) 
For printed wiring boards
" Y : parts extracted from the conductor side.
" � : Through hole.
" ó : internal component.
" b: Pattern from the side which enables seeing.
(The other layer s patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
" (( )) : Page of supplement-1.
MAIN Board Part No.
Former : 1-672-491-11
New : 1-672-491-12
 KEY BOARD (SIDE B) 
KEY Board Part No.
Former : 1-672-492-11
New : 1-672-492-12
11
CDX-1150
2. SCHEMATIC DIAGRAM  MAIN SECTION (1/3) 
((Page 5))
" Waveforms (MODE:PLAY)
1
1.3Vp-p
IC102
9 (ARF)
2
0V
Approx. 200mVp-p
IC102 @"! (TE)
3
0V
Approx. 600mVp-p
(FE)
IC102 @Ł
Note:
" Voltage and waveforms are dc with respect
to ground under no-signal conditions.
no mark : CD PLAY
((Page 6))
44
CDX-1150
3. SCHEMATIC DIAGRAM  MAIN SECTION (2/3) 
((Page 6))
Note:
" Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
< > : CD PLAY
55
((Page 4))
CDX-1150
4. SCHEMATIC DIAGRAM  MAIN SECTION (3/3) 
((Page 5))
Note:
" Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
( ) : AM
< > : CD PLAY
66
((Page 4))
((Page 7))
CDX-1150
5. SCHEMATIC DIAGRAM  DISPLAY SECTION 
((Page 6))
Note:
" Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
77