Ic Block Diagrams - Sony MZ-E90 Service Manual

MZ-E90
6-3-2. SCHEMATIC DIAGRAM — MAIN BOARD (1/4) — • Refer to page 46 for IC Block Diagrams.
• Waveforms (MODE:PLAY)
1
Approx.
12mVp-p
IC501 1 (TE) (TP523)
2
Approx.
130mVp-p
IC501 890qa
3
Approx.
1.2Vp-p
IC501 ed (RF OUT) (TP528)
4
Approx.
10mVp-p
IC501 rf (FE) (TP525)
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/ W or less unless otherwise
4
specified.
• % : indicates tolerance.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
– 31 –
(Page 36)
• A : B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PB
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
(Page 33)
(Page 37)
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J : PB
– 32 –