Schematic Diagram - Tx/Mic Boards - Sony NTM-30 Service Manual

NTM-30
4-2. SCHEMATIC DIAGRAM – TX/MIC Boards –
Note on Schematic Diagram:
• 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.
• ¢ : 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.
• U : B+ Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TX
• 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.
O
: TX
• Waveforms
1 Q103 (EMITTER) (CH A) (TX mode)
1 V/DIV, 20 nS/DIV
3.2 Vp-p
60.2 nS
– 11 –
(FREQUENCY)
FREQUENCY
2 Q103 (EMITTER) (CH C) (TX mode)
1 V/DIV, 20 nS/DIV
3.1 Vp-p
60.17 nS
DEVITATION
• IC Block Diagram
IC101 TA2011S
3 Q103 (EMITTER) (CH C) (TX mode)
1 V/DIV, 20 nS/DIV
3.1 Vp-p
60.13 nS
– 12 –
–
DET
+
1 2 3 4 5 6 7