Yamaha c 2 x

Page 1

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IMPORTANT NOTICE

This mmml has been providzd for the use uf authorized Yamaha Ruuilers and meir servim personnel.
it has been assumed that basie serviro proeedures inherant to the industry, and more speniflcally Vamatra
Products, are already known and understood by the users, and have thereiore not been restaced.

WARNING: Failure to lolluw appropriate service and saletv procedures when sarviclng this producr
may result in personal iniury, destmciion or expensive components and railure of the
product to perform as specified. For these reasons, we advise all Yamaha product owners
that all service requimd should be performed by an authorized Yamaha Retailer or rhe
appoinied serviee representative.

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IMPORTANT: The piesenullon or sale 9f this manual in any individual 0! firm don no: constlwl:
amhorizallon, carlifiuilion, ruogli' 'on of any applicable lechnlcal capabillfltes, or
eslabllsh a principle agent velzlionship of any form

The data provided is believed to be natural: and appllcablc to the unit/s rndieateo on rhe cover. The
researeh, engineering. and rerviee departmenrs oi Varnana are continually strivlng to improve Yamaha
produets, Mo eatidns are, therefore, inevirable and changes in specification are subicct to change withuul
notice or obligation to retrofit. Should any discrepancy appear to existi please conmi the distributor's
Service Division.

WARNING: Static discharges ean desrmy expensive components, Discharge any smic electricity your
body may havz accumulated by grounding yourself to the ground buss in the unit (heavy
sauna black wire: connect to this hussl.

IMPORTANT: Turn the uni! OFF durlng disassembly and bnrls raplacemenL Rechuk all work balm:
you applY power to the unit.

ICONTENTS

l TO SERVICE PERSONNEL ....... . ........ . 1 .Equalizer Circuit Board................... 6
REARPANEL............................ 1 oToneControICircuitBoard............... 7
BLOCKDIAGRAM.a..................... 2 SCHEMATICDIAGRAM.................. 8
SPECIFICATIONS........................ 3 PARTSLIST

NAMESOFTHEPARTS...................4 DELECTRICPART5...................9~12

i DISASSEMBLY PROCEDURES ............ . 4 .EXPLODED VIEW13

5

ADJUSTMENTS.........V.. ....14,15

l PRINTED CIRCUIT BOARD

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'; NIPPON GAKKI C0,. LTD. HAMAMATSU. JAPAN
7 nk-I7I®Primed in Jaoan.85.2

.MECHANISM PARTS . . . . . . .

Page 2

C-2x

.TO SERVICE PERSONNEL

1. Critical Components Information.

Components having special characteristics are marked A
and must be replaced with parts having specifications equal
to those originally installed.

2. Leakage Current Measurement (For 120V Model Only).
When service has been completed, it is imperative that you
verify that all exposed conductive surfaces are properly
insulated from supply circuits,

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15uF,

o Leakage current must not exceed 0.5mA.

0 Be sure to test for leakagewith the AC plug in both polarities.

IREAR PANEL
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EQUIPMENT
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AC LEAKAGE TESTER
OR EQUIVALENT

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