Sony TC-PX100 Service Manual ▷ View online
TC-PX100
US Model
AEP Model
UK Model
E Model
Tourist Model
SERVICE MANUAL
STEREO CASSETTE DECK
MICROFILM
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol
Licensing Corporation.
“DOLBY” and the double-D symbol
a
are trademarks
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
TCM-ACLM572
SPECIFICATIONS
Recording system
4-track 2channel stereo
Fast forward time
Approx.120 seconds
(for C-60)
(for C-60)
Frequency response
With DOLBY NR set to OFF
TYPE IV tape:
TYPE IV tape:
30 - 15,000 Hz,±3 dB
20 - 16.000 Hz,±6 dB
20 - 16.000 Hz,±6 dB
TYPE II tape:
30 - 15,000 Hz,±3 dB
TYPE I tape:
30 - 14,000 Hz,±3 dB
Overall S / N ratio
57 dB (TYPE IV Tape)
Distortion
315 Hz, tertiary higher harmonic distortion:
1.8% (TYPE II tape)
Recording level:
250 nWb/m
Max. recording level audio compensation
For a TYPE IV tape
DOLBY NR C:
DOLBY NR C:
73 dB
DOLBY NR B:
66 dB
DOLBY NR OFF:
58 dB
Input
TAPE IN (phono jacks):
impedance 47 kilohms
impedance 47 kilohms
Output
TAPE OUT (phono jacks):
voltage 0.5 mV
impedance 47 kilohms
voltage 0.5 mV
impedance 47 kilohms
GENERAL
Power requirements
North American model:
120 V AC, 60 Hz
European models:
220-230 V AC, 50 / 60 Hz
Other models:
110-120 V or 220-240 V
AC, 50 / 60Hz
Adjustable with the
voltage selector
AC, 50 / 60Hz
Adjustable with the
voltage selector
Power consumption
12 W
Dimensions
Approx. 215 x80 x
327.5 mm (w / h / d)
incl. projecting parts and
controls
327.5 mm (w / h / d)
incl. projecting parts and
controls
Mass
Approx. 3.0 kg
Supplied accessories
Audio connecting cords (2)
TAPE CONTROL system cable (1)
TAPE CONTROL system cable (1)
Design and specifications are subject to change without notice.
— 2 —
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
!
OR DOTTED LINE WITH
MARK
!
ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
LEAKAGE
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1.
A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2.
A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
digital multimeter is suitable for this job.
3.
Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
SAFETY CHECK-OUT
To Exposed Metal
Parts on Set
0.15
µ
F
1.5 k
Ω
AC
Voltmeter
(0.75 V)
Voltmeter
(0.75 V)
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
1. GENERAL
·········································································· 3
2. DISASSEMBLY
2-1.
Case, Front Panel ································································ 4
2-2.
Mechanism Deck (TCM-ACLM572) ································· 5
2-3.
Control Board, Dolby Board ·············································· 5
2-4.
Power Trans Board, AC Select SW Board, Power Board ··· 6
2-5.
Tray Assembly ···································································· 6
2-6.
Mechanism Chassis Block ·················································· 7
2-7.
Capstan Reel Motor (M902) ··············································· 7
3. DIAGRAMS
3-1.
Circuit Boards Location ····················································· 8
3-2.
Schematic diagram — Display Section — ························· 9
3-3.
Printed Wiring Board — Display Section — ··················· 11
3-4.
Printed Wiring Board — Main Section — ······················· 16
3-5.
Schematic Diagram — Main Section — ·························· 21
3-6.
IC Block Diagrams ··························································· 25
3-7.
IC Pin Function Description ············································· 27
4. MECHANICAL ADJUSTMENT
································ 29
5. ELECTRICAL ADJUSTMENT
·································· 29
6. EXPLODED VIEWS
6-1.
Case, Front Panel Section ················································· 33
6-2.
Chassis Section ································································· 34
6-3.
Mechanism Deck Section-1 (TCM-ACLM572) ·············· 35
6-4.
Mechanism Deck Section-2 (TCM-ACLM572) ·············· 36
6-5.
Mechanism Deck Section-3 (TCM-ACLM572) ·············· 37
7. ELECTRICAL PARTS LIST
······································· 38
— 3 —
SECTION 1
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
— 4 —
SECTION 2
DISASSEMBLY
Note :
Follow the disassembly procedure in the numerical order given.
2
Two screws,
case stopper
8
Front panel
1
Two screws,
case stopper
7
Three screws
(+B 3
×
8)
6
Loading panel
5
Slide the tray.
(Remove the connector from M901, supply the 6 V
power from an external regulated power supply to
pin-5 and pin-6 of CN05.)
power from an external regulated power supply to
pin-5 and pin-6 of CN05.)
4
Case
3
Screw (+B 3
×
8)
CN05
M901
Pin-5
‘
Pin-6
’
Regulated DC
power supply
power supply
Connector
Connector
Rear side
Pin-1
Pin-6
CN05
1
6
+
–
–
2-1.
CASE, FRONT PANEL