Sony TC-C5 - Adjustments

SECTION 5
TC-C5/C521
ADJUSTMENTS
5-1. MECHANICAL ADJUSTMENTS
PRECAUTION
1, Clean the following parts with a denatured-
alcohol-moistened swab:
record/playback “erase head
rubber belts capstan
idler
2. Demagnetize the record/playback head with a head
demagnetizer,
pinch roller
3. Do not use a magnetized screwdriver for the ad-
justments,
4. After the adjustments, apply suitable locking compound
to the parts adjusted,
5. The adjustments should be performed in the rated
power supply voltage unless otherwise noted.
Torpue Measurement
CQ-102C _ {30-60g+cm (0.42 — 0.8302 inch)
FWD
. CQ-102C 1~5g+cm (0.014 ~ 0.0630z+ inch)
Back tention
RE
30 — 60g+cm (0.42 — 0.830z° inch)
REV
: CQ- 102RC 1—5g°cm (0.014 — 0.0630z° inch)
Back tention
FF, REW CQ-201B 65 — 100g*°cm (0.9— 1.390z*inch)
5-2. ELECTRICAL ADJUSTMENTS
Note: The adjustment should be performed in the order given
in the service manual. As a rule, adjustments about
playback should be performed before those about recording.
The adjustments should be performed for both L-
CH and RCH.
« Switches and controls should be set as follows unless
otherwise specified,
DOLBY NR switch : OFF
DIRECTION switch —-
TIMER switch : OFF
» Standard Record:
Deliver the standard input signal level to the input jack
and set the REC LEVEL control to obtain the standard
output signal level.
—Record Mode—
AF OSC
He, Attenuator
oD
VTVM
LINE IN LINE OUT
Standard Input Level
Standard Output Level
Test tape
[se fe
Record Bias,
Record Level and
CS-123 a Quick Reverse
Sensitivity Adjustment
Bias Consumption
Current Adjustment
The set will get into TEST MODE by shorting the pins of TP801
(TEST) pins 2 and 3 on SYSTEM CONTROL board before turning the
power on, and TEST MODE functions as follows :
OdB =0.775V
Remove a short pin after electrical adjustment is finished.
1. Source monitor
Cancels muting of line signal while recording.
2. Record memory stop
When starting recording, tape counter is reset to zero and
counter memory turned on.
Record Playback Erase Head Azimuth Adjustment
Procedure :
1, Mode: FWD playback
Test tape
P-4-A100
(10kHz, — 10dB) VTVM
LINE OUT