Sunn T50C Service Manual

T50C

p/n 021-3304-000 (120V)

SERVICE MANUAL

CONTENTS:

Notices
Specifications
Parts lists:

Main PCB assembly
FX PCB assembly
Chassis assembly
Cabinet assembly
Footswitch as s em b ly
End item

Schematics/diagrams

Fender Musical Instruments Corp.,

 is a registered trademark of

sunn

7975 North Hayden Road, Scottsdale, AZ 85258

Sunn T50C

SERVICE MANUAL

MARCH 2000

IMPORTANT NOTICE:

The information contained herein is C ONFIDENTIAL and P ROPRIETARY to Fe nder Musical Instruments C orp. It is
disclosed solely for use by qualified technicians f or purposes of equipment mai ntenance and service. It is no t to be
disclosed to others without the expressed permissi on of Fender Musical I nstruments Co. All s pecifications s ubject to
change without notice.

For warranty repair service, only Fender specified part numbers are to be used. It is recommended they also be used
for post-warranty maintenance and repair.

Parts marked with an asterisk (
and SAFETY requirements.

A coded naming conve ntion is used in the description of certain parts. The code s and what they mean are as follows:

CAPACITOR CODES HARDWARE CODES

CAP AE = Aluminum Electrolytic BLX = Black Oxide
CAP CA = Ceramic Axial CR = Chrome Plated
CAP CD = Ceramic Disk HWH = Hex Washer Head
CAP MPF = Metalized Polyester Film M = Machine Screw
CAP MY = Mylar NI = Nickel Plated
CAP PFF = Polyester Film/Foil OHP = Oval Head Phillips

RESISTOR CODES

RES CC = Carbon Comp SMA = Sheet Metal "A" Point
RES CF = Carbon Film SMB = Sheet Metal "B" Point
RES FP = Flame Proof SS = Stainless Steel
RES MF = Metal Film TF = Thread Forming
RES WW = Wire Wound ZI = Zinc Plated

) indicate the required use of that specific part. This is necessary for RELIA BILITY

*

DO NOT USE A SUBSTITUTE!

PB = Particle Board
PHP = Pan Head Phillips
PHPS = Pan Head Phillips Sems

Sunn T50C

SPECIFICATIONS

Product Release No.: PR 425 (This is not a model number)

Part Number: 120V Version : 21-3304

240V Aust : 21-3334
230V UK : 21-3344
230V : 21-3364
100V : 21-3374

Power Requirement: 325W

Power output: 50 Watts RMS (High output)

12.5 Watts RMS (Low output)
1 kHz sine wave into 16Ω @ <3% THD (Presence @ "1")

Input impedance: 1 MΩ

Tubes: Two 6L6GC Tubes p/n 053980

Two 12AX7A Tubes p/n 023572
Five 12AX7WA Tubesp/n 013341
One 12AT7 Tube p/n 023531

Speaker: Celestion G12T75, 12 in, 16Ω

Fuse: F1: F3A 250V fuse for 100V and 120V versions

T1A 250V fuse for 230V and 240V versions

F2: T100mA (All versions)

Footswitch: 3 Button Footswitch p/n 055771

(Controls Channel, Effects Loop Select, and Reverb)

Dimensions: Height: 22" (55.9 cm)

Width: 24.5" (62.2 cm)
Depth: 11.6" (29.5 cm)

Weight: 75 lbs. (33.8 kg)

Product specifications are subject to change without notice

Sunn T50C

PARTS LIST

NOTE: SHADED ITEMS ARE FOR REFERENCE ONLY

MAIN

PRINTED CIRCUIT BOARD ASSEMBLY

QTY PART # DESCRIPTION REFERENCE DESIGNATION

1 0055364000 MAIN PCB FAB SUNN T50C

2 0051660000 BRACKET R/A PC MNT #6-32 BK1 BK2

2 0028953000 CAP AE AX 100uF 350V +50%-10% C201 C202
1 0038690001 CAP AE AX 1uF 100V 20% C17
2 0025960001 CAP AE AX 22uF 16V 20% C33 C36
3 0024819000 CAP AE AX 22uF 500V +50%-10% C203 C204 C207
1 0038693001 CAP AE AX 47uF 16V 20% C1
2 0024820000 CAP AE AX 47uF 350V 20% C208 C209
2 0041589000 CAP AE AX 47uF 500V +50%-10% C205 C206

2 0028494000 CAP AE RDL 1000uF 35V 20% C214 C215
2 0031040000 CAP AE RDL 100uF 100V 20% C210 C211
2 0028482003 CAP AE RDL 220uF 50V 20% C212 C213
3 0036954003 CAP AE RDL 22uF 63V 20% C216 C217 C220

1 0020883002 CAP CD 10pF 1000V 10% C38
3 0051458003 CAP CD 470pF 500V 10% C8 C18 C31
1 0051408003 CAP CD 47pF 500V 5% C3
1 0011435002 CAP CD 680pF 1000V 10% C16
2 0025951002 CAP CD 750pF 1000V 10% C13 C15
1 0025995002 CAP CD 8200pF 1000V 20% C200

2 0034788003 CAP CR .1uF 50V 20% .2" LS C224 C225

3 0027272003 CAP MPF .047uF 63V 10% C21 C32 C34
1 0027280003 CAP MPF .15uF 63V 10% C221
1 0027278003 CAP MPF .1uF 63V 10% C219
1 0027281003 CAP MPF .22uF 63V 10% C222
2 0027286003 CAP MPF .47uF 63V 10% C218 C223
2 0033477003 CAP MPF .68uF 63V 10% C7 C11

1 0024823000 CAP MPF RDL .01uF 400V 10% C22
6 0024833000 CAP MPF RDL .022uF 400V 10% C9-10 C12 C19 C20 C42
5 0024845000 CAP MPF RDL .047uF 400V 10% C2 C14 C23-24 C39
2 0024846000 CAP MPF RDL .047uF 630V 10% C44 C45
2 0024853000 CAP MPF RDL .1uF 250V 10% C41 C43

1 0037666002 CAP PFF .001uF 400V 10% C5
1 0047065002 CAP PFF .0015uF 400V 10% C37
1 0026202000 CAP PFF .0022uF 400V 10% C4
1 0037040002 CAP PFF .0033uF 400V 10% C35
2 0025962000 CAP PFF .0047uF 400V 10% C6 C40

2 0041510000 CONTROL SNAPIN 25K B R17 R38
1 0047031000 CONTROL SNAPIN 25k 30C TAPER R103
1 0037600000 CONTROL SNAPIN 100k B TAPER R90
2 0047540000 CONT ROL SNA PIN 250 k 15A T APE R R18 R37
3 0037597000 CONT ROL SNA PIN 250 k 30A T APE R R15 R36 R40
2 0041507000 CONTROL SNAPIN 1M 10A TAPER R7 R16
2 0026133000 CONTROL TRIM 25k LIN R212 R213

(CH 1 MID, CH 2 MID)

(PRESENCE

(REVERB)

(GAIN, CH 2 BASS)

(CH 1 TREB, CH 2 TREB, CH 2 VOL)

(CH 1 VOL, CH 1 BASS)

(BAL, BIAS)

Sunn T50C

MAIN

PRINTED CIRCUIT BOARD ASSEMBLY (CONT)

QTY PART # DESCRIPTION REFERENCE DESIGNATION

17 0026730001 DIODE 1N4006 800V 1A D13 D14 D17 D200-207 D210-213 D236 D237
14 0006260001 DIODE 1N4448 SIGNAL LL D1 D9 D10 D216 D218 D221-227 D229 D231

2 0029690001 DIODE HV 3kV 200mA LL D12 D16
2 0031635001 DIODE ZEN 1N5240B 10V 5% LL D217 D228
2 0031019001 DIODE ZEN 1N5245B 15V 5% LL D2 D3
2 0028119060 DIODE ZEN 1N5353B 16V 5W 5% D214 D215
2 0041811060 DIODE ZEN 1N5368B 47V 5W 5% D208 D209

6 0026000001 FASTON TAB, .187" P14-17 P63 P64

23 0025802000 FASTON TAB, .250" P8 P35 P36 P39 P40 P42-55 P65 P68 P70 P71

1 0022546000 FU S E H OLDER PCB MTG UNIV E R S AL F2
1 0022548000 CARRIER, FUSE 5mm F2
1 0013004000 FUSE TD 100mA 20mm x 5mm 250V F2

1 0027416000 HDR .1 CTR 8 CKT SQ PIN P13
3 0031611000 IC OP-AMP DUAL PC4560 U1 U3-4

1 0037117000 JACK PCB MONO CLOSED CKT J1
1 0025933000 JACK PHONO DUAL PC MTG J4
3 0026481000 JACK TIP J7-9

1 0028039000 LED RED 5x5mm SLB-55VR3 D232
1 0030754000 LED RED T-1 3mm DIFFUSED D220
1 0033177000 LED R E D/G REE N 5x5m m BI- C OLO R D18
2 0036178000 SPACER LED .5x.1 BRN @ D18 D220
2 0036613000 RELAY DPDT DIP 24VOLT 8.3mA K1-2
2 0026368001 RES CF 1/2W 5% 100ohm LL R216 R217
1 0025941001 RES CF 1/2W 5% 560ohm LL R121
1 0025113001 RES CF 1/2W 5% 10k LL R104
1 0031065001 RES CF 1/2W 5% 91k LL R108
9 0025116001 RES CF 1/2W 5% 100k LL R3 R11 R13 R21 R31 R34 R88 R95 R109
1 0025117001 RES CF 1/2W 5% 220k LL R207
1 0036957001 RES CF 1/2W 5% 470k LL R26

6 0024969001 RES CF 1/4W 5% 1.5k LL R4 R22 R46 R85 R86 R231
6 0024997001 RES CF 1/4W 5% 100k LL R110 R111 R223 R224 R237 R243

10 0024981001 RES CF 1/4W 5% 10k LL R10 R20 R25 R30 R33 R44 R210 R225-227

1 0024937001 RES CF 1/4W 5% 10ohm LL R126
1 0024998001 RES CF 1/4W 5% 120k LL R211
1 0024999001 RES CF 1/4W 5% 150k LL R99
2 0024985001 RES CF 1/4W 5% 15k LL R221 R242
1 0025058001 RES CF 1/4W 5% 180k LL R82
1 0024955001 RES CF 1/4W 5% 180ohm LL R222
1 0024986001 RES CF 1/4W 5% 18k LL R27
1 0028862001 RES CF 1/4W 5% 1.3k LL R220
8 0025069001 RES CF 1/4W 5% 1M LL R1 R6 R19 R41 R43 R91 R105 R106
6 0025059001 RES CF 1/4W 5% 220k LL R5 R24 R29 R39 R84 R93
1 0029455001 RES CF 1/4W 5% 2.4k LL R102
1 0024971001 RES CF 1/4W 5% 2.2k LL R101
3 0024987001 RES CF 1/4W 5% 22k LL R42 R120 R125
1 0029450001 RES CF 1/4W 5% 240k LL R80
1 0025077001 RES CF 1/4W 5% 3.3M LL R94
1 0024989001 RES CF 1/4W 5% 33k LL R35
2 0025079001 RES CF 1/4W 5% 4.7M LL R81 R87

(INPUT)
(REVERB)

(V9, GND, V10)

Sunn T50C

MAIN

PRINTED CIRCUIT BOARD ASSEMBLY (CONT)

QTY PART # DESCRIPTION REFERENCE DESIGNATION

11 0025065001 RES CF 1/4W 5% 470k LL R8-9 R23 R28 R92 R96 R97 R219 R229 R230 R240

2 0024961001 RES CF 1/4W 5% 470ohm LL R107 R122
3 0024993001 RES CF 1/4W 5% 47k LL R45 R47 R100
1 0025066001 RES CF 1/4W 5% 560k LL R79
1 0024962001 RES CF 1/4W 5% 560ohm LL R236
1 0028948001 RES CF 1/4W 5% 6.2k LL R228
1 0024979001 RES CF 1/4W 5% 6.8k LL R241
2 0024995001 RES CF 1/4W 5% 68k LL R2 R14
1 0025068001 RES CF 1/4W 5% 820k LL R239
3 0024964001 RES CF 1/4W 5% 820ohm LL R12 R32 R89
2 0029613001 RES CF 1/4W 5% 91k LL R214-215

2 0027349001 RES FILM 1W 5% 10k LL R203 R204
1 0028029001 RES FILM 1W 5% 1.5k LL R218
1 0027347001 RES FILM 1W 5% 2.2k LL R83
6 0027354001 RES FILM 1W 5% 220k LL R118 R119 R123 R124 R205 R206

1 0016979001 RES MF 1/4W 1% 215k LL R233
1 0017191001 RES MF 1/4W 1% 36.5k LL R238
1 0016971001 RES MF 1/4W 1% 33.2k LL R235
2 0017372001 RES MF 1/4W 1% 51.1k LL R232 R234

1 0029870001 RES MOX 2W 5% 1.5k LL R200
1 0036921001 RES MOX 2W 5% 1k LL R201
1 0041740110 RES MOX 2W 5% 4.7k LL R202
2 0033095001 RES MOX FP 1W 5% 1ohm LL R114 R115

2 0041256000 RES WW 5W 10% 470ohm R116 R117
2 0029047000 RES WW 7W 10% 270ohm R208 R209

5 0051442000 SOCKET, TUBE 9PIN PCB MOUNT @V1-5

1 0028091000 SW I T C H PU S H S LFLK SHORT STRO K E S4
1 0028104000 BUTTON PUSH BLACK @ S4
1 0049976000 SW I T C H TOGGLE DPST DC W/ N U T S S3

1 0028503000 THERMISTOR 10 ohm 5A C60-11 RT1
1 0041261000 VOLT REF LM4040DCZ-10 TO-92 U2

2 0014689003 XSTR N-CH JFET J111 TO-92 Q5 Q6
2 0041465003 XSTR N-CH JFET J113 TO-92 Q1 Q4
2 0016739003 XSTR NPN 2N4401 TO-92 Q7 Q8
1 0016742003 XSTR PNP 2N4403 TO-92 Q9

(CH SELECT)

(OUTPUT PWR)

FX LOOP

PRINTED CIRCUIT BOARD ASSEMBLY

QTY PART # DESCRIPTION REFERENCE DESIGNATION

1 0055809000 PCB FAB FX LOOP SUNN T50C
1 0048914000 CABLE RIBBON 8 CKT 7" P13

1 0038690001 CAP AE AX 1uF 100V 20% C30
1 0009512001 CAP AE AX 22uF 25V 20% C28
1 0052003003 CAP MPF .1uF 250V 10% C27