MT-2 Boss Metal Zone Schematic

Technical specification:
    Input Impedance: 1MΩ
    Output Impedance: 1kΩ
    Recommended Load Impedance: 10kΩ or greater
    Equivalent Input Noise Level: -110 dBu or less (IHF-A, Typ.)
    Power Supply: 9V Battery or PSA-Series AC Adaptor
    Current Draw: 20mA (DC 9V)

Overdrive Effect

Ibanez Tube Screamer TS-9

Boss Super Overdrive SD-1

Marshall Pedals: Blues Breaker, Drive Master & Shred Master

Marshall Blues Breaker

Marshall Drive Master

Marshall Shred Master

Marshall JCM900 Preamp Schematic

I did not include technical data for this preamp, it's just a scheme to guide repair. May be useful for those who have a Marshall JCM900 guitar preamp .

Stereo Chorus

Semiconductor parts :

• IC1,IC2: 6458D or TA75558P (Dual operational amplifier)
• IC3: LA6358 or TA75358P (Dual operational amplifier)
• IC4: MN3207 (1024 stage BBD)
• IC5: MN3102 (BBD driver)
• IC6: D4027BC or TC4027BAP (Dual J-K Master/Slave Flip-Flop)
• Q1-Q3,Q5,Q7-Q9: 2SC1815 or equivalents (NPN silicon transistors)
• Q4,Q6,Q9: 2SK772, 2SK445 or equivalents (N-Channel JFET)
• D1-D6: 1N4148 or equivalents (switching diodes)
• ZD1: 5.1V Zener diode

Pearl CH-02 Chorus

Semi Conductor  in this Circuit

CH-2 major routine board:

•     IC1: JRC4558DD (dual functional amplifier)
•     IC2: MN3207 (1024 level BBD)
•     IC3: MN3102 (BBD driver)
•     IC4: TL022CP (dual low-power general-purpose functional amplifier)
•     Q1,Q2,Q3: 2SC2240GR (NPN rubber transistors)
•     Q4,Q5: 2SC1815Y (NPN rubber transistors)
•     D1: 1S1588 (switching diode)
•     D2: UZ-5.1B (5.1V Zener diode)

SW-1 transferring board:

•     IC1: MC14007UB (Three N-Channel and P-Channel contrasting couple and inverter)
•     Q1,Q2: 2SC1815Y (NPN rubber transistors)
•     D1,D2: 1S1588 (switching diodes)
•     D3: Red LED
•     D4: MA522 (Lambda diode)

Boss CS-2 Compression Sustainer

Semi conductor component used in the Administrator CS-2 pedal:

•     IC1: BA662A (VCA - Provide Handled Company IC)
•     Q1, Q2, Q3: 2SK30ATM-Y (N-channel JFET transistors)
•     Q4, Q5, Q6: 2SC732TM-GR (NPN plastic transistors)
•     Q7-Q11: 2SC1815-BL (NPN plastic transistors)
•     D1: S5500G (400V/1A rectifier diode)
•     D2-D6: 1S2473 (switching diodes)
•     D7: RD5.1EB3 (5.1V Zener diode)
•     LED: SLP135B (red LED)

BOSS Octave OC2 Schematic

The OC-2 reproduces three different tones: the original tone, one octave below, and two octaves below. Each part has its own volume control so they can be mixed at will.

Boss CE-2 chorus pedal

The Boss CE-2 chorus pedal is a good analogue of the late 70s and early 80s. According to this page on BossArea.com was the marketing of this 2-arrested in November 1982, but the pedal is still produced and sold until at least 1990. Although no longer in production there are thousands of these pedals used by guitarists around the world - it is one of the most coveted Boss pedals on the market opportunity.

Schematic :

Scott Swartz PT-80 Delay

 

Component Layout

Schematic

Boss BF-2 flanger pedal schematic

The BF-2 was sold in 1980 but remains one of the most widely used analog flanger pedal. The 4 buttons (manual, depth, speed and resonance) allow users to shape the sound the way you want - from dynamic sound effects jet plane on short delay chorus and vibrato.

schematic :

Roland Boss HD2 Mega Distortion schematic