12AX7
V5
12AX7
V4
12AX7
V1
12AX7
V2
12AX7
V3
6L6
V7
6L6
V9
6L6
V8
6L6
V6
MARK IIC+ TUBE REPLACEMENT DIAGRAM
PREAMP TUBES POWER TUBES
V1A
V1B
V2A
V2B
V3A
V3B
V4A
V4B
V5A&B
Input stage Clean and Lead
2nd Gain stage Clean and Lead
3rd Gain stage Clean 5th Gain stage Lead
Loop Return stage Clean and Lead
Reverb Return stage
3rd Gain stage Lead
4th Gain stage Lead
Reverb Drive stage
Driver/Phase Inverter
SIMUL-CLASS:
V6, V7, V8, V9
CLASS A:
V8 & V9
BEFORE CHANGING TUBES FLIP POWER & STANDBY SWITCH TO OFF
INPUT JACK
TO MAINTAIN WARRANTY, USE MESA/BOOGIE
®
TUBES WHEN REPLACEMENT IS NECESSARY
FOR CUSTOMER SUPPORT, PLEASE CALL 707-778-6565 MONDAY-THURSDAY 9-5 PST, OR VISIT WWW.MESABOOGIE.COM
FRONT OF CHASSIS
PAGE 39
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