Pioneer SA 7800 Service Manual

Page 1

ADDITIONAL GDPIONEER

Sefiice
Wanna]

STEREO AMPLIFIER

A-7BOD HG

NOTE:
0 For detailed instructions on adjustments, circuit descriptions, exploded view, etc., please refer
to KU type service manual (ART344).

1. SPECIFICATIONS

The specifications for HG type is the same as
the KU type except for following sections;

A l'f' '
mm I seem)" Hum and Noise (lHF A202, 78)

PHONO ............................. 75dB
TUNER, AUX, TAPE PLAY 1,2 ............ 83dB

Continuous Power Output at lkHz (both channel driven)
T.H_D. 0.005%, 8 ohms ........ 65 watts per channel
input (Sensitivity/Impedance)

TAPE PLAY 2 (DIN connector) , . Miscellaneous

150mV/50 kilohms

Output Power Requirements ........... 220/240V, 50/60Hz
TAPE REC 2 (DIN connector) ..... 30mV/80 kilohms Power Consumption ................. 650W (max)
Hum and Noise (DIN, Continuous Power/SOmW) Dimensions ............ 420(W)Xl50(H)x376(D)mm
PHONO ......................... 72dB/64dB I6-9/I6(W)X5-7/8(H)x14»l3/I6(D)in
TUNER, AUX, TAPE PLAY 1,2 -------- 87dB/64d3 Weight Without Package ........... 12,4kg (27lb 602)

2. CONTRAST OF MISCELLANEOUS PARTS

- Tim 43 marl: found on some component parts indicates the importanrc of the
safely factor of the purl. Therefore, when replar'ing hp .curp In use prlrls of

PC. BOARD ASSEMBLIES Idflilififll designation,

Pan No.

l
S mbol l Descri tion " Remarks
y p KU iype HG type
Power amplifier assembly GWH7118 GWH-122
Power supply assembly GWer 12 GWFi-i 14
Volume assembly GWX-258 GWX-268
Switch assembly 1 GWSJGQ GWSvi 74
Terminal assembly GWX-259 GWX7269
PIONEER ELECTRONIC CORPORATION <2 , Mequvn w (,linriRVV/lmgru'n in, new, «5.3 Jahfin
us. momsen ELECTRONICS couponAnon as Duo-n Drvr: Mrinr'aijmp, Netw liPtSr-rv H7074 u SA

PIONEER ELECTRONIC (EUROPE) N.V. Ll,rlrvisgc-wHa-n-w «a 2030 Aurwm-p, I-jv-dqlwlll
PIONEER ELEcTnaNIcs AusrfiAuA 9W. LTD. I78 lEld Boundary Road BraE=,lr1€>. ViLLrJua 3195 Ailanalla

Y (9 FEB. 1979 Printed in Japan

Page 2

P.C. BOARD ASSEMBLIES

Part No.
Symbol Dascri tion
p KU type HG type Remarks
Phone jack assembly GWX-260 GWX-27O
Equalizer assembly GWF-115 GWF»115
Tone amplifier assembly GWG-123 GWG-123
Switch assembly 2 GWS-17O GWS-170
Indicator assembly AWV001 AWVv003
Connector assembly ........ AWX-062
OTHERS
Part No.
S b l De ' t' Remarks
ym a soup Ion KU type HG type
A $11 LGVer switch (POWER) ASK-124 ASK-127
A $12 Voltage selector ........ AKXOE']
A 06 Ceramic capacitor 0,01/250v ACG-001 ........
Mylar capacitor 0.01/400V ........ COMA 103K 400
A FU1 Fuse 6A AEK-109 ........
Fuse T3,15A ........ AEK-042
A FU2 Fuse 0.8A AEK-111 ........
Fuse T800mA ........ AEK-031
A FU3 Fuse 08A AEKJ 11 ........
Fuse TSOOmA ........ AEK031
A T1 Power transformer ATT»567 ATT-57O
A AC socket (AC OUTLETS) AKP-004 ........
A Recessed plug (AC INLET) ........ AKPoos
AC power cord ADG»023 ........
Strain relief AEC-327 ........
Wooden case AMM078 ........
Metal case AN E-223
Screw 4x25 ........ for wooden case
Screw 4x8 ABA-079 for metal case
Screw 3x10 ABA-181 for voltage selector
Screw 3x8 ABA057 for recessed plug
PACKING AND FURNISHED PARTS
Part No
Symbol Description Remarks
KU type HG type
Packing case AHD623 AHD-627
Top pad L AHA7219 ........
Top pad R AHA-220 ........
Bottom pad L AHA-221 ........
Bottom pad Fl AHA-222 ........
Side pad ........ AHA»13O
Operating instructions (ENGLISH) ARE-301 ARE-302
Operating instructions IGERMAN/FRENCH) ........ ARD-131