Electrical Checks And Adjustments - Tascam 122MKII Service Manual

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122MKII
6. ELECTRICAL CHECKS AND ADJUSTMENTS
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'Y'7
t~!l
- - - - - - P l 0 3
- - - - - - R 2 0 7
' - - - - - - - - R 20S
'+-- - - - - - H 2 0 9
- - - - - - R 2 0 4
- - - - - - R 2 0 5
- - - - - - - R 2 0 6
- - - - - - R 1 G 6
- - - - - - R l 0 5
- - - - - - R 1 0 4
- - - - - - R l 0 9
- - - - - - R l 0 a
- - - - -- R'07
- - - - - - U126
~+_-----VRPCBASSY
R201
ADJ SW PCB ASSY(R325) METER PCB ASSY(Rl06 / R206)
MOTHER PCB ASSY
RE FE RENCE
NU MBER
R101 / R201
Rl02/R202
R 1 03/ R203
Rl04 / R204
Rl05/R205
R
1
06 / R206
METER PCB ASSY
FUNCTION
BIAS ADJUSTMENT (NORMAL)
BIAS ADJUSTMENT (Cr02)
BIAS ADJUSTMENT (METAL)
REC EQ ADJUSTMENT (NORMAL)
REC EQ ADJUSTMENT (Cr02)
REC EQ ADJUSTMENT (METAL)
REFERENCE
NUMBER
R107/R207
R 1 OS / R20S
R109/ R 209
U126
VR PCB ASSY
FUNCTION
REC LEVEL ADJUSTMENT (NORMAL)
REC LEVEL ADJUSTMENT (Cr02)
REC LEVEL ADJUSTMENT (METAL)
BIAS OSC FREQUENCY ADJUSTMENT
REFERENCE
NUMBER
R 1 OS / R206
FUNCTION
METER CALIBRATION
REFERENCE
NUMBER
R201
FUNCTION
OUTPUT LEVEL BALANCE ADJUSTMENT (R-eh)
ADJ SW PCB ASSY
REFERENCE
NUMBER
FUNCTION
R325 400 Hz/ l0 KHz LEVEL BALANCE ADJUSTMENT
Fig_ 6-1 Adjustment Points
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