Schematic Diagram - Main (2/3) Section - Sony MHC-DX90 Service Manual

HCD-DX90
7-7. SCHEMATIC DIAGRAM – MAIN (2/3) SECTION – • See page 21 for Wavefoms. • See page 44 for IC Block Diagrams. • See page 34 for Printed Wiring Board of Head Boards.
1
2
3
TAPE MECHANISM
DECK BLOCK (2/3)
(TCM-230PWR11)
ERASE
TAPE MECHANISM
DECK BLOCK (3/3)
(TCM-230PWR11)
RV304
REC BIAS
(L-CH)
RV354
REC BIAS
(R-CH)
N
(Page 29)
MAIN BOARD (3/3)
12K
RV302
PLAYBACK LEVEL
(DECK A L-CH)
RV352
PLAYBACK LEVEL
(DECK A R-CH)
RV303
PLAYBACK LEVEL
4.7K
(DECK B L-CH)
C304
0.1
RV353
PLAYBACK LEVEL
(DECK B R-CH)
18k
18k
C354
0.1
RV351
REC LEVEL
(R-CH)
4.7k
(Page 29)
MAIN BOARD (3/3)
4.7k
4.7k
22k
22k
C395 0.1
RV301
REC LEVEL
4.7k
(L-CH)
1.2k
LEAF SW BOARD
CN1001
(Page 35)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
( ) : REC
< > : TAPE PB
28 28
47k
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
(Page 29)
MAIN BOARD (3/3)
MAIN BOARD (3/3)
(Page 29)
100
100
100
100
100
100
100
100
100
470
470
470
MAIN BOARD (3/3)
(Page 29)