Panasonic Technics SU-CH7 User Manual

SU-CH7
m@ CONTENTS
Page : Page
BEFORE REPAIR... 2... cee eee e een eee 2 SCHEMATIC DIAGRAM ........0 0.0 cece ence eee 13~19
PROTECTION CIRCUITRY 2.0.0... . ccc eee cece ence ee 2 PRINTED CIRCUIT BOARDS. ............ 0.0.0 cece eee 20~24
ACCESSORIES? «5.2 sev.ccntsueSing euip ance Weeks Mey eae as eles 2 WIRING CONNECTION DIAGRAM ............. 00.00 e cues 25
HOW TO INSTALL THE SYSTEM.............00.0 0c cece ees 3 FUNCTIONS OF IC TERMINALS ......... 0.00. c es ce eee sees 26
CONNECTIONS ....... 0. cece ence cece ene ene 4,5 BLOCK DIAGRAM ......... cece cece cents 27~29
LOCATION OF CONTROLS ...... 00.00 cee eee eee 6,7 REPLACEMENT PARTS LIST .......... 00.00 cee e eee 30~36
DISASSEMBLY INSTRUCTIONS ............... 0... eee ee 8~11 CABINET PARTS LOCATION ..............00.0 cece eae 37, 38
DESCRIPTION OF FLPANEL ...............2. ccc cence 12 PACKING (For System: SC-CH7)............. 0.00 e cece vues 39
m@ BEFORE REPAIR
(1) Turn off the power supply. Using a 10Q, 5 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 Hz/60 Hz in NO SIGNAL mode should be shown below with
respect to supply voltage 110 V~127 V/220 V~240 V.
Consumedcurrent50H2 | ——— 85~255 mA
x 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
Speaker cords (2)
<REC201B500-1>
@AC power supply cords (1)
<SFDACO5E03>
for (E, EG) area
<SJA193> for (EB) area
<RJA0004> for (GC) area
<SJA173> for (GN) area
Remote control batteries (2)
(UM-4, “AAA”, R03)
@FM indoor antenna (1)
<SSA270M>
for (E, EB, EG) area
<SSA272M> for (GC, GN) area
©)
eAttachment plug (1)
<SJP9009> for (EB) area
Remote control transmite r (1)
<RAK-SC510W>
for (E, EB, EG) area
<RAK-SC511W>
for (GC, GN) area

Panasonic Technics SU-CH7 Specifications

General

Brand	Panasonic
Model	Technics SU-CH7
Category	Amplifier
Language	English