Technics SE-CH610 - Power Source ON;OFF of This Unit; Operation Check; Schematic Diagram; Operation Circuit

SE-CH610 __
m@ Power Source ON/OFF of This Unit
1. Connect the AC power cord of this unit to an AC outlet and turn it on.
(This unit comes to stand-by mode.)
2. Make test point short as shown in Fig. 1.
POWER indicator lights and this unit comes to power ON mode.
Operation Check
1.Set this unit to power ON mode.
2.Input a signal (1 kHz, 100 mV) to the section ee
between the resistor R611 (LINE IN for L-ch) and ao pee aan
the capacitor C906 (LINE IN GND) as well as the
section between the resistor R612 (LINE IN R-ch) __ | CN501-2 ee
and the capacitor C906. et O
3.Connect the speaker to the speaker terminals and Resistor (R612) ox
check if it sounds from the speaker. ea (LINE IN for R-ch)
Capacitor ae ee
(LINE IN GND) L. = a F
aa | ee ee ee Ge isi
RIC
Resistor (R611)
(LINE IN for L-ch) Speaker
Terminal
Fig. 1
m@ Schematic Diagram
OPERATION: CIRC UUM ois. cecceeceziscicseccnataaunerweenractarsenntucuntes: 12, 13
[=] HEADPHONES JACK CIRCUIT o.oo... ccceeeeeeteetententenenee 12
MIC SACK CHRCUIT icscasscssiexassnsactuesienceratsehcestaccasesataataeistecntadies 12
DUN els (01 0] rs 14,15
[=] POWER TRANSFORMER CIRCUIT .........0...:ccccccccceeeteeeeeeee 15
A VOLTAGE SELECTOR CIRCUIT 0.0... 15
[eJ AC INPUT TERMINAL CIRCUIT |... ccececneeeteteteneneeeeen 15
® This schematic diagram may be modified at any time with the development of new technology.
Notes:
@ S601 : Power “STANDBY © /ON” switch (STANDBY © /ON)
es701 : Voltage select switch in 220 V position
®VR401___: Microphone volume control (MIC VOLUME)
®VR601_ ; Volume control (VOLUME)
® Indicated voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis
taken as standard. Therefore, there may exist some errors in the voltage values, depending on the internal impedance of the DC circuit tester.
No mark: Power ON
® Important safety notice:
Components identified by /\ mark have special characteristics important for safety.
Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are
used. When replacing any of components, be sure to use only manufacturer’s specified parts shown in the parts list.
® Caution!
IC andLSI are sensitive to static electricity.
Secondary trouble can be prevented by taking care during repair.
Cover the parts boxes made of plastics with aluminum foil.
Ground the soldering iron.
Put a conductive mat on the work table.
Do not touch the legs of IC or LSI with the fingers directly.
® Voltage and signal line
ape © POSitive voltage line seeePenzen © Negative voltage line
sasceceesses 1 Source signal Line (L-ch) [> : Mic signal (L-ch)
=44s