+
-
Mono 1/4-inch
Input
Ch. Select /Boost Footswitch
Channel Select
Boost
Preamp
Channel
Select
Boost
V1:B
Preamp
V2:A
0 dB
Expander
Splitter
Ch. 1
Volume
Ch. 1
Ch. 2
Ch. 2
Volume
K1
K1
Channel
Select
BRIT/U.S.A.
Select
Master
Volume
Power
Amp
V3
Preamp
V2:B
V4
V5
V6
V7
Internal
Speaker Out
External
Speaker Out
Pre-Amp Out
Pre-Amp In
EFX RVB Footswitch
Reverb
Effects
Scoop
U.S.A.
BRIT
Treble/Bass/Mid
Modern
Voice
Boost
Level
Presence Resonance
EQ
+
-
+
-
+
-
12-inch Speakers
YS#7083
16-ohms
16-ohms
YCS90 Speaker Configuration
+
-
+
-
12-inch Speaker
YS#7081
8-ohms
YCS50 Speaker Configuration
YCS50 Tube Configuration
YCS90 Tube Configuration
YCS50
YCS50H Tube Configuration
YCS50H
YCS90
D.I. Out
Effects Return
Dyna-Sound
Speaker Emulator
Effects Send
+
U2
B
U1
B
Reverb
Drive
Ch. 1
Ch. 2
Reverb
Rtn
Reverb
Accutronics ©
4EBC1B
Treble/Mid/Bass
Tone
Treble/Mid/Bass
Tone
Ch. 2
Gain
Preamp
V1:A
Ch. 2
Gain
Ch. 1
Gain
Preamp
V1:A
BLOCK-DIAG-ycs50-ycs90-00-1v2.ai
Block Diagram for YCS50/50H/YCS90
DESIGNED AND MANUFACTURED BY YORKVILLE SOUND
MODEL TYPE: YS1064
MODEL TYPE: YS1067
5881
5881
DISCONNECT POWER WHEN
REPLACING TUBES
DÉBRANCHÉ L’APPAREIL AVANT
DE REMPLACER LES LAMPES
POWER
SPLITTER
12AX7
12AX7
V1
V2
12AX7
V3
PREAMP
V5
V4
EL34
EL34
DISCONNECT POWER WHEN
REPLACING TUBES
DÉBRANCHÉ L’APPAREIL AVANT
DE REMPLACER LES LAMPES
POWER
SPLITTER
12AX7
12AX7
V1
V2
12AX7
V3
PREAMP
V5
V4
5881
5881
DISCONNECT POWER WHEN
REPLACING TUBES
DÉBRANCHÉ L’APPAREIL AVANT
DE REMPLACER LES LAMPES
POWER
SPLITTER
12AX7
12AX7
V1
V2
12AX7
V3
PREAMP
V5
5881
V6
5881
V7
V4
