Sony MZ-E90 service manual Waveforms Modeplay

MZ-E60

6-3-2. SCHEMATIC DIAGRAM — MAIN BOARD (1/4) — • Refer to page 33 for IC Block Diagrams.

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27)

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31)

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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 1/4 W or less unless otherwise specified.

Note:	Note:
The components identi-	Les composants identifiés par
fied by mark 0or dotted	une marque 0sont critiques
line with mark 0are criti-	pour la sécurité.
cal for safety.	Ne les remplacer que par une
Replace only with part	piéce portant le numéro
number specified.	spécifié.

•A: B+ Line.

•Power voltage is dc 1.5V 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.

•Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc- tion tolerances.

•Circled numbers refer to waveforms.

•Signal path. F : PB

•Waveforms (MODE:PLAY)

1 100mV/div 5∝ s/div	2	0.5V/div 5∝ s/div	3 5mV/div 1∝ s/div	4	5mV/div 1∝ s/div
Approx.		Approx.	Approx.		Approx.
180mVp-p		0.8Vp-p	10mVp-p		12mVp-p
IC501 7890	IC501 ed (RF OUT) (TP528)		IC501 r; (FE) (TP525)		IC501 rf (TE) (TP523)

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