Read Sony XR-1890 Service Manual online
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4. Repeat the above adjustment for the REV PB mode.
5. Check that output level difference between FWD PB mode
5. Check that output level difference between FWD PB mode
and REV PB mode is within 4 dB.
Adjustment Location: PB head
Tape Speed Adjustment
Setting:
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the speed checker or frequency counter becomes in
specification.
specification.
Specification: Constant speed
Adjustment Location: See page 11.
See the adjustment location from on page 11 for the
adjustment.
adjustment.
Speed checker
Frequency counter
–2 to +3%
2,940 to 3,090 Hz
TUNER SECTION
The tuner section has no adjustment.
FWD
REV
adjustment
screws
screws
+
–
speed checker
or
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
speaker out terminal
set
4
Ω
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