Sony ST-S444ES Service Manual page 13

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Note:
Circled T.P. No.'s coincide with those in mounting and schematic diagrams.
TEST POINTS, WAVEFORMS AND OPERATING VOLTAGES
ST-S444ES ST-S444ES
=
T.P. Waveform or Voltages TP. Waveform or Voltages TP. Waveform or Voltages
No. No. No.
MUTING MODE
FM/AM
5V P-P
oO WV | @ 15V. ON @
a [vy
-3V OFF | 13V AM
Jae
saat
"OV
® Nf) 5V PP IF BAND
bj
20ms (3) ——15V (WIDE)
OV (NAR) eA
IF BAND
UU from HI-BLEND
8) Zh HI-BLEND (FM) TUNE MODE
18ms
{_ i 15V ON @9)
——-——0V_ OFF
UY Tomy JULIL feav
(4) ae b—+
18ms CAL 1ms
|
(5)
15V ON
UU "Tisomv I—ov ore
m
6) bi
a TUNE MODE
18ms
TUNE MODE
CAL MODE
TUNING (=) MODE
15V AUTO
| MUTING MODE
UVu _[24omv -1V MANUAL HI-BLEND MODE
© loin TUNING @) MODE
IF BAND MODE
a | SCAN READ MODE
@ ——15V ON
300mV
@ UVUAE 2 ae OFF G2)
18ms I I I | |46v
| ALL MODE
3.1ms
UUU _[340mv paren 4
ba}
18ms
ov
- @
button kept pressed
HI-BLEND
UUY "aomv
@ on. ———15V OFF IF BAND MODE
OV ON SCAN MODE
UU Js20mv @ EMA
fm Oe a
Qi) i 5 2V P-P
IF BAND
EM/AM
4ms
2
a) —15V (NAR) 13V. AM 6ms "
@) 0.2V FM
——— OV (WIDE) OV IF BAND button kept pressed
TEST POINTS, WAVEFORMS AND OPERATING VOLTAGE
TP.
TP. |
Waveform or Voltages No.
Waveform or Voltages |
1C605 PIN No. 23
IC601 PIN No. 5
| [sav P-P
i MW eevee
0.22ms name]
0.14 us
TUNING button
kept pressed
j—__|
IC 605 PIN No. 22 IC601 PIN No. 6
CAL TONE
sv ov |@] NVf\f\y leovne
he ay OFF Pl
0.14 ps
IC605 PIN No, 25 +——
FRONT END (FM) CV.
4V P-P
2.5ms Se 27V 108.0MHz
———— 8V ss 87, 5SMHz
1C605 PIN No. 31
—
0.25ms
IC 605 PIN No. 34
VAVAN [40m V P-P
aia
0.25 us
IC 605 PIN No. 35
a ee
<OV
1C601 PIN No. 13
WW
7 us
640mV P-P
1,602 kHz
|
0.5 us
810mV P-P
531kHz
Tavs Vea V P-P
4+
+>
0.25 us
a4
1C605 PIN No. 32
NP leov er
cal
0.25 ps
1C601 PIN No. 11
1.1V P-P
(87.5MHz)
a]
0.1 us
1.1V P-P
(108.0MHz)
b+
0.08 us
T.P.
No. Waveform or Voltages