Pioneer gr 777 service manual

Page 1

0,9 PIONEER

The future of sound and vlslon.

Sefiicc

ORDER NO.
ARP1 608

GRAPHIC EQUALIZER
MODEL (SR-777 HAS FOUR VERSIONS:

Type Power nquiemem Expo dmlnltlon

KUC ACIZOV only U.S.A. and Canada

SD ACI1OV,120V~ 127V.220V.240V Iswhchabla) Klngdem cf SaudIArabla and general murkm

SD/G AC1 10V,12OV- 127V,220V,240V (ewltchnble) U.S.MIIiIary

HEZ AC220V.240V IswhchlbIe) West Gevmuny
0 This service manual Is applicable to the KUC, SD, SD/G and HEZ types
I For the SD, SD/G and HEZ types refer to page 22.
CONTENTS
I. SAFETY INFORMATION ---------------------- 2 6. ELECTRICAL PARTS LIST --------------- ' ------ I7
2. PACKING ---------------------------------- '3 7, [C AND DISPLAY INFORMATION ~ 20
3. EXPLODED VIEWS AND PARTS 8, FOR so, SD/G, AND HEZ TYPES ............... 22

L'ST ......................................................... 6 g PANEL FACHJTIES AND
4. scHEMAT'c D'AGRAM .............................. 7 SPECIFICATIONS ....................................... 24
5. P.C.BDARD CONNECTION

DIAGRAM ................................................ 1 l

PIONEER ELECTRONIC CORPORATION 4-1. Meguro 1-Chome. Meguro-ku, Tokyo 153. Japan

PIONEER ELECTRONICS SERVICE INC. PO. Box 1760. Long Beach, Calllorma 90801 USA.

PIONEER ELECTRONICS OF CANADA. INC. 505 Cochrane Drive, Markham. Ontario L3H 8E3 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgxum

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road. BraeSIde, Victoria 3195, Auslralia TEL: [03] 580-9911

T PIONEER ELECTRONIC CORPORATION 1988 V0 "INF PrianrI In Ianan

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GR-777

1. SAFETY INFORMATION

1. SAFETY PRECAUTIONS

The following check should be performed for the
continued protection of the customer and service tech»
nician.
LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground
(water pipe, conduit, etc.) by connecting a leakage current
tester such as Simpson Model 2292 or equivalent between
the earth ground and all exposed metal pans of the appli-
ance (input/output terminals, screwheads, metal overlays,
control shaft, etc.). Plug the AC line cord of the appliance
directly into a 120V AC 60Hz outlet and turn the AC
power switch on. Any current measured must not exceed
0.5mA.

Reading should
not be above

Dev-e 0.5mA
under
test
Test all
exposed metal
surlaoes
2-wire cord

@ AIIO tut wrth
plug reversed Earth
lUnng AC adapter ground
plug as required)

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
TENTIAL SHOCK HAZARD AND MUST BE 00R-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical pans in the appliance
have special safety related characteristics. These are often
not evident from visual inspection nor the protection
afforded by them necessarily can be obtained by using
replacement components rated for voltage, wattage, etc.
Replacement parts which have these special safety charac-
teristics are identified in this Service Manual.

Electrical components having such features are identified

by marking with a .3. on the schematics and on the parts
list in this Service Manual.
The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one, shown in the
parts list in this Service Manual, may create shock, fire,
or other hazards.

Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER Service
Manual. A subscription to, or additional copies of, PIONEER
Service Manual may be obtained at a nominal charge from
PIONEER.