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Summary of Contents for Mark Bass LITTLE MARK III
- Page 1 LITTLE MARK III COMBO HEAD II SERVICE MANUAL 2009 EDITION...
- Page 2 How to disassemble the LMIII / CHII preamp 1. Remove the six black knobs and the three yellow knobs pulling out as indicated in the picture (red arrow). 2. Remove the nine silver hexagonal nuts using a 10 or 11 mm nut screwdriver.
- Page 3 How to disassemble the LMIII / CHII poweramp 1. Remove the four connectors (yellow arrows). 2. Cut the two ties (green arrows). 3. Remove the six screws (red arrows). How to disassemble the LMIII / CHII front panel components 1. Remove the two screws with a 2.5 mm hexagonal wrench (red arrows). 2.
- Page 4 How to Disassemble the LMIII / CHII rear panel components 1. Remove the four hexagonal nuts using a 15 mm nut screwdriver (green arrows). 2. Using a screwdriver, remove the two screws of the line out jack and the two screws of the speaker out speakon combo jack (yellow arrows).
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Page 5: Parallel Connection
Effects Loop Modification The images below show how the effects loop in your amp can be modified to run in series. The default factory setting is parallel. PARALLEL CONNECTION REAR PANEL SECTION LMIII / CHII PREAMP SECTION SERIAL CONNECTION REAR PANEL SECTION LMIII / CHII PREAMP SECTION... - Page 6 47nF/275Vac_X2 1uF/275Vac_X2 3.3mH/6A 330K 4.7nF/Y1_X2 MV-VR1 275L40 Rete 330K 4.7nF/Y1_X2 800V/5A 1000uF/200V 2.5Ohm MV-RT2 1000uF/200V 110/220 270K +80VDC RF2001T2D RF2001T2D 1000uF/100V RF2001T2D 1uF/63V 1000uF/100V IRFP27N60K -80VDC 270pF 270pF RF2001T2D 1uF/250V +15V TRANS5_2_1 LM7815CT +20V +15V +15V IR21531D BYV27-200 + C61 + C64 100uF/25V 2200uF...
- Page 7 +12PROT +12PROT +18V SourceH 2.2K +12PROT +12PROT 10uF/25V 1N4148 J112 2.2K 1N4148 IC10 180K 0.1uF/63V 0.1uF/63V 4.7k 220K -15VC63 FAN2 2N7002 1N4148 1.8K 2.2k 0.1uF/63V CTLA OUT A H1AA1 0.1uF/63V 100uF/35V CTLB OUT B IC4A 1N4148 -15V RST A DISC A 1N4148 RST B DISC B...
- Page 8 0.1u 0.1u 0.1u 0.1u 0.1u V-15 100K V+15 4.7n 1.5K 100uF 35V 0.1u 100uF 35V 0.1u V-15 Little Mark III Parsek s.r.l. Title via Aterno, 30 66020 S.Giovanni Teatino Size: Number: Revision: Chieti Date: 22-Jan-2009 Time: 17:47:04 Sheet ITALY File:...
- Page 9 MIX(-) S-MIX(-) LEVEL3 BC846 V+15 6.2V 1/4W OUT-POST 0.1u 33uF 63V IC3B LEVEL4 LEVEL5 TL072 2N7002 Parsek s.r.l. Little Mark III Title via Aterno, 30 66020 S.Giovanni Teatino Size: Number: Revision: Chieti Date: 22-Jan-2009 Time: 17:47:05 Sheet ITALY File: Sheet1.Sch...
- Page 10 820K 820K 2.2K H1AA1 2.2u 5_14 220p V+22 V+15 IC5C V-15 IC5D Output 6.8K 4.7K 3.3K Little Mark III Parsek s.r.l. Title via Aterno, 30 66020 S.Giovanni Teatino Size: Number: Revision: Chieti Date: 22-Jan-2009 Time: 17:47:05 Sheet ITALY File: Sheet3.Sch...
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