Sony TC-PB5 - Adjustments: Head and Motor Speed Calibration; Head Height and Electrical Adjustments; Capstan Motor Speed Calibration

Head Height Adjustment
1. Prepare an adjustment cassette as shown below.
Cut out hatched
tape cassette portions.
2. In playback mode and viewing from the front,
adjust the head heights by using the adjustment
screw A, B, C, to eliminate tape curl and tape
twist at portions shown by arrow.
pinch roller
capstan
Bi cc ee
TC-PB5
TC-PB5
3-2, ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in
the order given in this service manual.
@ Set the TAPE switches according to the tape as
follows.
@ Switches and controls should be set as follows
unless otherwise specified.
DOLBY NR switch: OFF
@ Standard Output Level
| | rtiones | tine our
load impedance 82 50k
77.5V (—20dB) | 0.44V (—5dB)
Capstan Motor Speed Adjustment
Procedure:
Mode: playback siaed checker
LFM-30
; or
digital frequency
test tape counter
WS-48
(3kHz, OdB)
LINE OUT
Adjustment Value:
—0.17 ~ +0.17% 2.995 ~ 3.005Hz
Frequency difference between the beginning
and the end of the tape should be within 0.34%
(10Hz).
Adjustment Location:
Adjust the speed by using
screwdriver. When turning the
screw clockwise, speed is ve capstan motor