DELUXE 112 PLUS
THEORY OF OPERATION (CONT)
Diodes’ CR9-CR12 make up a voltage clamp protection circuit. Q8 and Q9 make up a current limiting
protection circuit. If the output is shorted, the voltage at the emitters of Q10 and Q11 will increase. This
voltage is sensed through R100 and R107 and presented to the bases of Q10 and Q11. When Q10 and
Q11 turn on, the drive current and bias to the output transistors is removed, which shuts down the output
section of the amplifier.
The output signal feeds through the Headphone jack circuit, before driving the speaker. With headphones
connected to the headphone jack the speakers are muted.
PARTS LIST
PRINTED CIRCUIT BOARD ASSEMBLY
QTY PART # DESCRIPTION REFERENCE DESIGNATION
1 048873001 PCB ASSY DELUXE 112 PLUS (STUFFED)
1 031910 BREAKER THERMAL 15A 155/195DEG TS1
1 048451 BUTTON PUSH OFF WHITE @S1
1 028577 CABLE REVERB 30” @P1-4
2 031756 CAP AE 4700uF 50v C47,48
1 028458 CAP AE RDL 1uF 50V 20% C53
4 028459 CAP AE RDL 2.2uF 50v 20% C11,33,34,36
1 028460 CAP AE RDL 4.7uF 50V 20% C35
6 028465 CAP AE RDL 22uF 50V 20% C6,12,25,27,39,40
4 028471 CAP AE RDL 47uF 50V 20% C37,38,49,50
2 025787 CAP AE RDL MINI 100uF 16V NP C57,58
1 039255 CAP CA 10PF 100V C10
1 038698 CAP CA 47PF 100V C29
1 038873 CAP CA 22PF 100V C26
1 038699 CAP CA 100PF 100V C23
1 038701 CAP CA 470PF 50V C14
1 038874 CA[ CA 560PF 50V C17
2 039263 CAP CA 100PF 100V C3,32
2 039268 CAP CA 4700PF 100V C1,2
4 027278 CAP MPF .1uF 63V 10% C41,42,59,60
2 027281 CAP MPF .22uF 63V C5,30
5 027286 CAP MPF .47uF 63V C4,15,16,43,44
1 033579 CAP PFF RDL .0015uF 100V 10% C21
2 033580 CAP PFF RDL .0022uF 100V 10% C13,28
1 033581 CAP PFF RDL .0033uF 100V 10% C20
1 036234 CAP PFF RDL .015uF 100V 10% C31
1 033590 CAP PFF RDL .022uF 100V 10% C19
6 033591 CAP PFF RDL .033uF 100V 10% C7,8,9,24,45,46
5 033592 CAP PFF RDL .047uF 100V 10% C18,22,51,52,56
2 033596 CAP PFF RDL .068uF 100V 10% C54,55
1 024853 CAP PFF RDL .1uF 250V 10% C61
2 027947 CONTROL SNAPIN 100K 30C TAPER R26,35 (GAIN, TREBLE-DRIVE CH)
1 027949 CONTROL SNAPIN 250K 30C TAPER R38 (BASS-DRIVE CHANNEL)
1 027397 CONTROL SNAPIN 2K 15A TAPER
R14 (MID)
2 027940 CONTROL SNAPIN 50K 15A TAPER R12,13 (CLEAN CH TREBLE, BASS)
1 027943 CONTROL SNAPIN 50K 30C TAPER R24 (CLEAN CHANNEL VOLUME)
3 027941 CONTROL SNAPIN 50K B TAPER
R33,34,56 (CONTOUR REVERB DRIVE CHANNEL VOL.)
2 064089 DIODE 1N4003 CR13,14
26 006260 DIODE 1N4448 SIGNAL CR1-4,9,11,15-21,28-36,39-42
4 029045 DIODE 6A 400V 6A4 LEAD FORMED CRC22,23,24,25
4 028776 DIODE BIAS BYV26D LEAD FORMED CR5,6,7,8
2 027327 DIODE ZEN 1N5234B 6.2V 5% CR10,12
2 028119 DIODE ZEN 1N5353B 16V 5W 5% CR26,27
12 025802 FSTN TAB MALE .250X.032 PCB MT CR1-5,7-11,13,14
2 026000 FSTN TAB MALE PCB MT .187X.032 CP6,12
2 025996 FUSE CLIP PCB .250&5MM FUSE XF1
1 039982 FUSE QA 1-1/4X1/4 250V 4A F1 (100/120V ONLY)
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