PowerAmplifierAssembly(GWH-139)

C A P A C I T O R S

Part No.

Symbol & Delcription

coMA 103K50

Cl17 - C120

c o M A 8 2 3 K5 0

C l 3 1 ,C l 3 2

coMA 332K250

C113,Ct 14

ccDsL 101K500

C121 - C124

ccDsL 390K50

c111 . Cl ,l2

ccDsL 470K50

C105 - Cl10

ccDsl 221K 50

C103,Cl04

C E A N L4 R 7 M5 0 L

C l 0 1 ,C 1 0 2

CEANPR22Ms0

C125,C126

c E A 4 7 1 M6 L

C l 3 3

Part No,

Symbol & Descriprion

2SCr400

o l 1 3 ,o 1 1 4 , A 1 1 9 , A 1 2 0

2SA905

0 1 I 5 , 0 1 1 6

2SA904A

4121 , Q122

2SC'1914A

0 1 2 3 , 4 1 2 4

a 2SC2275 - O'

O125 .O l26

12sc2275.P'l

 

f]2SA985 . O* 0127,0128 (2SA985"P')

*hfeof Q125-0128 shouldhavethe samerank

2SC2575

o't29 - o133

2SCl384

o 1 3 4

MZ-061

D 1 0 1 - D l 0 6

(wz - 061)

 

H H t

T

I

t

c E A 1 0 1 M2 5 L ACG{09

Note:

RESfSTORS

Part No.

R D % P Mo n n J

R D % PnMn n J

C ' t 3 4

C127- C130 Ceramic (0 . 047i1SOV)

\fhen ord.eringresisfors,eonuert the resistanceualue into code form, and

thenrewritetlrc partno. asbefore

Symbol & Description

R 1 0 1 - R 1 0 8 ,R l 1 1 , R 1 1 2 ,R 1 1 5 R 1 1 6

R 1 1 9R, 1 2 0R. 1 2 5R, l 2 6n, r a S , ' n r a j ' R 1 4 9 - R 1 5R2 ,1 5 7R. l 5 8 ,R 1 6 9R, l 7 2 ,

R 1 7 7 - R 1 8 1 ,R l 8 4 - R 1 8 6

STV2H 10E2

1S1555

(152076)

1S2471 MZ-150 (wz-150)

o T H E R S

p a r t

N o .

D 1 0 9D, 1 1 0

D 1 1 1 . D 1 1 2 , D 1 1 7 , D 1 1 8 D 1 l 3 - D 1 1 6

o123 - D125,D128

v t z o

9yqlglt o"*lelgl

I I I

A R D % P M F n n n J

R 1 0 9 , R 1 1 0 , R 1 1 3 , R 1 . t 4 , R 1 1 7 , R 1 1 8 , A S R - 0 6 7

R123,R124,A127 - R142,8147,R148pizsopooorrvlc

R L l

R e l a v

t

aRD%PMFEDfi J

RD%PSDilN J

;! Roz,rsrnnn .t

R153 - R156,R159 _ R164 F143,R144

nr21, R12z

PowerSupplyAssembly(GWR-j22)

R N , I HN N D K R S 2 PI ] C N J

,{ ncru-rat

TH103 - 2

ACP-062

ACP - o19

ACP - o10

R 1 7 3 ,R 1 7 4

R 1 7 5 ,R 1 7 6

R 1 6 5 ,R 1 6 7

T h 1 0 1 ,T h 1 0 2

V R 1 , V R 2 S e m i -ifx e d 3 3 0 k V R 3 , V R 4 S e m i - f i x e d1 0 0 V R 5 , V R 6 S e m i -ifx e d 1 0 0 k

CAPACITOBS

Part No .

cEA 100M50L cEA 470M50L cEA 22'lM16L cEA 221P80 cEA 470M50L

$l-o-! lQeryrlqlon

C206,C227

C209,C210

C217

C202,C203

C207,C20a

I

t

I

S E M I C O N D U C T O R S

Part No .

Symbol & Oescription

2 S C 1 7 7 5 A " E -

O 1 0 1 0, 1 0 2

(2SC

 

177sA - F')

 

2SA979 - F'

0103,0104

c E A 4 7 1 l ! 4 1 6 L cEA 102M351

c E A 1 0 1 M2 5 L c E A 4 7 0 M1 0 L c E A 4 7 1 M6 L

cEA 2R2M50L

ACG - 004

C 2 1 3 , C 2 1 4

C215

C 2 1 6

C 2 1 B

C 2 1 9

C223

C 2 0 1, C 2 1 ', lC 2 2 4 C e r a m i c { 0 . 0 1 / 1 5 0 V )

t

I

.

(25A979-G)

*hfeof O101andQ102shouldhavethe E - rankif. O103,and O1O4havethe F - rank .

'hfe O101 Q102F"rank,

of and shouldhavethe if 0103and 0104 havetheG"rank .

ccDsl 101K50

C204 . C205

CKDYF473250

C220

ACH-212

C 2 2 5 , C 2 2 6 E l e c t r o l y t i c( 12 0 0 0 / 5 6 V )

I

2SC2291

0105,0106

2 S A 7 5 0

0 1 0 7 ,0 1 0 8

{2SA726S}

 

2 S C 1 9 1 5

0 1 0 9 ,0 1 1 0

2 S A 7 5 0

0 1 11 .Q 112 ,0 1 1 7 ,0 11 8

I

lf

44

il

 

Page 44
Image 44
Pioneer SX-3800 manual PowerAmplifierAssemblyGWH-139, Ncru-rat, 9yqlglt o*lelgl, Roz,rsrnnn .t

SX-3800 specifications

The Pioneer SX-3800 is a classic stereo receiver that emerged in the late 1970s, embodying the high-fidelity audio aspirations of its time. As part of Pioneer’s widely respected SX series, the SX-3800 is hailed for its exceptional sound quality, robust construction, and an array of features that cater to both audiophiles and casual listeners alike.

One of the SX-3800's standout characteristics is its power output. It delivers a solid 80 watts per channel into 8 ohms, making it capable of driving a variety of speaker systems with ease. This ensures a dynamic audio experience, with clear highs, rich midrange, and deep bass. The receiver also exhibits low total harmonic distortion (THD) ratings, which means the sound produced is clean and faithful to the original recording.

The SX-3800 is equipped with a high-quality AM/FM tuner, which is known for its excellent sensitivity and selectivity. Featuring a large analog dial, it allows users to effortlessly dial into their favorite stations while the signal strength meter helps in fine-tuning the reception. This tuner is complemented by Pioneer’s proprietary Auto-Seek tuning function, making it easier for users to find and lock onto stations.

In terms of connectivity, the SX-3800 comes with several inputs and outputs, including phono, tape, aux, and multiple speaker outputs, offering flexibility for various audio setups. Additionally, the built-in phono preamp ensures that vinyl lovers can connect their turntables with ease, preserving the rich detail and warmth that analog sources are known for.

Another technological highlight of the SX-3800 is its inclusion of a loudness control feature, which allows users to enhance the low and high frequencies at lower volume levels. This feature is particularly useful for late-night listening or in quieter environments where detail is essential but loudness is not an option.

With its solid construction, vintage aesthetics, and a beautiful wood finish, the Pioneer SX-3800 not only performs well but also adds a classic touch to any audio setup. Its blend of features, performance, and timeless design continues to make it a desirable component in the world of vintage audio equipment. Collectors and enthusiasts appreciate the SX-3800 not just for its sound quality but also for its enduring legacy in the rich history of audio technology.