Technics SU-CH700 Service Manual

SU-CH700
m@ CONTENTS
Page Page
BEFORE: REPAIR: ta 2: iste gi hiss Sic binienech hedahs 2 PRINTED CIRCUIT BOARDS .............-.-.0-20005 15~18
PROTECTION CIRCUITRY ......... 2.0... c cece eee eee 2 WIRING CONNECTION DIAGRAM .........-..-2000 000 c eee 19
ACCESSORIES. sce nawsied a Reed sete pide nda beteans ce4aks 2 DESCRIPTION OF FLPANEL ...............0.0000...000000. 20
LOCATION OF CONTROL ..........0 0000 e cece eee 3~4 BLOCK DIAGRAM .............. 0.2 c cece cen 21~22
CONNECTIONS .... 2.000 ees 4 FUNCTION OF IC TERMINALS...........0.......0000 000008 23
DISASSEMBLY INSTRUCTION ................0.20- 200s 5~7 REPLACEMENT PARTS LLIST................0...... 24~27, 30
SCHEMATIC DIAGRAM CABINET PARTS LOCATION .............0..000000 0000s 28, 29
(Operation/FL/Headphones circuit) ...........0.....000005 8~10 PACKAGING we. f0 i sisi eg Sais bus Steet g Bate adda uae awa wed 31
SCHEMATIC DIAGRAM
(Input-Output/Main circuit) ........0.02.2.....2. 200 11~14
m@ BEFORE REPAIR
(1) Turn off the power supply. Using a 10Q, 10 W resistor, connect both ends of power supply capacitors (C703, C704) in order to discharge the
voltage.
(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage controller to make
sure that the consumed current at 50/60 Hz in NO SIGNAL mode is mode should be shown below with respect to supply voltage 110 V/120 V/
220 V/240 V.
Power supply voltage AC 110V AC 120V AC 220 V AC 230 V AC 240 V
Consumed current 50 Hz 279~518 mA 264~491 mA 142~265 mA 152~283 mA 133~248 mA
Consumed current 60 Hz 229~426 mA 222~413mMA 120~223 mA 125~232 mA 112~208 mA
m PROTECTION CIRCUITRY
The protection circuitry may have operated if either of the following conditions is noticed:
*No sound is heard when the power is switched ON.
*Sound stops during a performance.
The function of this circuitry is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are “shorted”, or if
speaker systems with an impedance less than the indicated rated impedance of this unit are used.
If this occurs, follow the procedure outlined below:
1. Switch OFF the power.
2. Determine the cause of the problem and correct it.
3. Switch ON the power once again.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again.
m@ ACCESSORIES
Attachment plug .......... 1pce. Speakercord............ 2pcs. TV/FMindoorantenna.... 1pc. Remote control
<SJP9009>
for
(EB)
area
<SWXS257M>
<RSA0006>
for
(GC)
(GN)
area
transmitter
..........0...
1
pe.
<RSA0007> for (E) (EB) (EG) area <RAK-SC514W>
AM loop antenna.......... tpe. Antennaholder.......... 1pc. Remotecontrolbatteries ..2 pcs.
<SPB1163T> <SMA233-1M> <RO3>
Optical cable ............ dpc. AC Powersupplycord.... 1pe. oO” = AC plug eras a 1 pe.
<SJP2281> <RJA0019-1K> for (E) (EG) area Sere oe On Gea(ee
pees <SJA193> for (EB) area
a ms <RJA0004> for (GC) area
~ \ <SJA173> for (GN) area

Technics SU-CH700 Specifications

General

Brand	Technics
Model	SU-CH700
Category	Amplifier
Language	English