Sony PCM-R500 - Dat Recorder User manual
Ver 1.1 2002.01
9-960-833-12 Sony Corporation
2002A0500-1 Home Audio Company
C2002.1 Published by Sony Engineering Corporation
DIGITAL AUDIO TAPE DECK
Model Name Using Similar Mechanism DTC-A8
Tape Transport Mechanism Type
DATM-55
US Model
Canadian Model
AEP Model
SERVICE MANUAL
PCM-R500
SPECIFICATIONS
– Continued on next page –
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– 2 –
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚ C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering or
unsoldering .
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
MODEL IDENTIFICATION
– Model Number label (Printed in Back Panel) –
MODEL NO. PCM-R500
DIGITAL AUDIO TAPE DECK
US, Canadian model : AC 120 V 60 Hz 34 W
AEP Model : AC 230 V
⁄
50/60Hz 34 W
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the
manufacturer.
Discard used batteries according to the manufacturer’s instructions.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en ekvivalent typ som
rekommenderas av apparattillverkaren.
Kassera använt batteri enligt fabrikantens instruktion.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.
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– 3 –
SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts forAC leakage. Check leakage as
described below.
LEAKAGE TEST
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 microampers). Leak-
age 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.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of aVOM
or battery-operatedAC 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 VAC range are suitable. (See Fig.A)
1.5 k
Ω
0.15
µ
FAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
TABLE OF CONTENTS
1. GENERAL ..................................................................... 4
2. DISASSEMBLY............................................................ 15
3. ADJUSTMENTS.......................................................... 19
4. DIAGRAMS
4-1. Block Diagrams ................................................................. 26
4-2. Printed Wiring Board – RF Section –................................ 33
4-3. Schematic Diagram – RF Section –................................... 35
4-4. Printed Wiring Boards – MD Section –............................. 38
4-5. Schematic Diagram – MD Section – ................................. 41
4-6. Printed Wiring Boards – DIGITAL Section – ................... 45
4-7. Schematic Diagram – DIGITAL Section –........................ 49
4-8. Schematic Diagram – AUDIO Section – ........................... 53
4-9. Printed Wiring Boards –AUDIO Section –....................... 57
4-10. Printed Wiring Boards – DISPLAY Section –................... 61
4-11. Schematic Diagram – DISPLAY Section – ....................... 65
4-12. IC Pin Function Description .............................................. 72
5. EXPLODEDVIEWS ................................................... 83
6. ELECTRICAL PARTS LIST .................................... 91
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 PUB-
LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
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SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CASE
1
four screws
(case)(M3
×
10)
2
case
1
five screws
(case) (M3
×
10)
MECHANISM DECK BLOCK
1
Open the lid.
6
two screws
(PTPWH 3
×
6)
6
two screws
(PTPWH 3
×
6)
4
three connectors
(CN506-508)
5
flat wire
(CN504)
7
Remove the mechanism
deck block to direction
of the arrow.
2
two claws
3
lid
2
two claws
HOLDER ASS’Y
1
screw (step)
4
screw
(BVTT3
×
6)
3
nylon washer
5
Side plate (R) ass’y
2
two screws
(B2.6
×
4)
6
two screws
(B2
×
4)
8
holder ass’y
CASSETTE COMPARTMENT MOTOR ASS’Y
7
function plate ass’y
9
cassette compertment
motor ass’y
8
two screws
(P2.6
×
3)
0
screw
(B2.6
×
4)
7
slider
ass’y
6
screw
(B1.7
×
3)
1
capstan belt
2
screw (B1.7
×
3)
3
pulley
4
screw (B1.7
×
3)
5
driving gear
0
screw
(B2.6
×
4)
!¡
chassis (L)
– 15 – – 16 –
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DRUM
1
flexible board (CN7)
3
two screws
(B2
×
3)
3
two screws
(B2
×
3)
2
connector
(CN52)
4
drum
DRUM DRIVE BOARD, REEL MOTOR
1
two screws
(B2
×
3)
2
DRUM DRIVE board
3
screw
(B2
×
3)
4
bracket
5
two screws
(B2
×
3)
6
reel motor
CAPSTAN MOTOR
2
capstan motor
1
three screws
(P1.7
×
4)
– 17 – – 18 –
1
two screws
(B2
×
3)
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PRECAUTION
1. The adjustments are performed in the sequence that they are
described.
2. The required test tapes are:
TY-7111 (8-909-812-00) ................................. Level
TY-7252 (8-909-822-00) ................................. Tracking
TY-7551 (8-909-814-00) ................................. Function
TY-30B (8-892-358-00)................................... Blank
The required torque meter is:
TW-7131 (8-909-708-71) ................................ FWD
3. Switch and Control Settings
REMOTE switch : OFF
REC MODE switch : 48k (STANDARD)
REC LEVEL control : Minimum
PHONE LEVEL control : Minimum
4. Preparation of End Sensor Cassette
(1) Push the slider locks of a cassette tape and slide the slider in
the direction of the arrow.
hub hole
slider lock
slider
hub hole
slider lock
(2) Open the cassette lid and cut tape.
slider tape
cut tape
cassette lid
(3) Turn the hubs to take-up tape (for both T and S sides).
The end sensor cassette tape for end sensor adjustment is
now prepared.
5. Take care never to turn RV1 and RV2 within the RFAMP board
of the cassette compartment section.
6. When adjusting tape pass and each guide, as shown below, it is
a good practice to remove the holder assy and use the DAT cas-
sette holder (J-8000-002-A). This facilitates adjustment work.
•When removing and installing the holder assy, turn the pulley
counterclockwise and set loading OUT condition for easy re-
moval and installation.
•When adjusting, turn the pulley clockwise and turn on the
CASSETTE TABLE IN switch (S2) to set loading IN condi-
tion. Then, set the test tape.
SECTION 3
ADJUSTMENTS
7. Test Mode
•To enter the test mode, short between TP (MAIN-TEST) and
the GND on the DIGITAL board, then turn on the power. The
meter scale within the fluorescent indicator tube (FL701) will
flash.
Press the OPEN/CLOSE 6key and set the test tape. (The
specified tape should be used for each adjustment.)
Test Mode (Short between TP (MAIN-TEST) and GND)
1Have “DPG” display lit in the fluorescent indicator tube.
(Press the AMS +key.)
•S2, T2 and F Guide Adjustments
•End Sensor Adjustment
•Tape Pass FineAdjustment (×1.5FWD mode)
•DPG Adjustment
2Have “TR” display lit in the fluorescent indicator tube.
(Press the ”key.)
•FWD Torque Adjustment
•FWD Back Tension
Adjustment
•To release the test mode, remove the short between TP (MAIN-
TEST) and GND. After necessary adjustment is completed,
be sure to release the test mode.
(Torque measurement mode)
1
BVTT 3
×
8
5
Nylon washer
7
Cassette
holder assy
4
Push down the holder
in the direction
3
Cassette
spring
2
BVTP 3
×
6
6
Step screw
8. After adjustment is completed, perform the following checks to
verify the tape speed.
(1) Check that with the REC MODE switch set to STANDARD
48k, tape is normally recorded and played back. (×1)
(2) Check that with the REC MODE switch set to LONG, tape
is normally recorded and played back. (×0.5)
(3) Check that in performing the CUE (”+ )) or REVIEW
(”+ 0) operation, “kyur kyur” sound is heard. (×3, ×8)
Adjustment Location: mechanism deck block
(4) Check that after performing the FF ()) or REW (0)
operation, the time display is appropriate. (×16)
(5) Check that the AMS (+, =) operation is normal.
T1 guide
T2 guide
F guide
S1 guide
S2 guide
– 19 – – 20 –
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– 21 –
3-1. MECHANICAL ADJUSTMENTS
When replacing any drum related parts, after S2, T2 and F guide
adjustments have been made, tape pass fine adjustment (×1.5FWD
mode) in Electrical adjustment should be performed.
S2,T2 and F Guide Adjustments
Adjustment Method:
1. Enter the Test Mode 1(see page 19.) and set the test tape TY-
7252 (8-909-822-00).
2. Set the REC MODE switch to STANDARD 48k and press the
AMS +key.
While in FWD mode, check that there is no curl on the upper
and lower flanges of the S2, T2 and F guides.
If any curl is present, put the S2, T2 and F guide of concern
back in the high position and adjust by adjusting the direction
of tightening.
*
What is curl?
Curl
Distortion that occurs on
tape during FWD operation.
3-2. ELECTRICAL ADJUSTMENTS
End Sensor Adjustment
When removing the holder assy and when replacing the mechanism
deck block, this adjustment should be performed.
Adjustment Method:
1. Connect the CH-1 terminal of an oscilloscope to TP (S-END)
and the CH-2 terminal to TP (T-END) on the DIGITAL board.
2. Enter the Test Mode 1(see page 19.) and set the end sensor
cassette tape (see page 19.)
3. Set the STOP (p) mode.
4. Adjust RV502 (S-END) and RV501 (T-END) on the DIGITAL
board so that the respective peak to peak values of the wave-
forms on the oscilloscope are 1.2 Vp-p.
Adjustment Location: See page 23.
FWDTorque Adjustment
Adjustment Method:
1. Enter the Test Mode 2 (Torque Measurement Mode) (see page
19.) and set the torque meter TW-7131 (8-909-708-71).
2. Press the PLAY (”) key.
3. Press the )key or 0key and adjust so that the FWD torque
value (T side take-up torque) is within the range of 11 to 13
g•cm.
4. When the torque meter is circulating around, check the indi-
cated value.
1.2Vp-p
FWD BackTension Adjustment
Adjustment Method:
1. Enter the Test Mode 2(Torque Measurement Mode) (see page
19.) and set the torque meter TW-7131 (8-909-708-71).
2. Press the PLAY (”) key.
3. Press theAMS +key or =key and adjust so that the back
tension (S side) is within the range of 8.5 ± 0.5 g•cm.
4. When the torque meter is circulating around, check the indi-
cated value.
5. Verify that the maximum value is less than 19.5 g•cm.
REVTorque Check and REV BackTension Check
Check Method:
1. After FWD torque adjustment and FWD back tension adjust-
ment are completed, press the PLAY (”) key again and set REV
(“) mode.
2. Check that the REV torque value is within the range of 13.5 to
17.5 g•cm and that the REV back tension value is within the
range of 7.5 to 11.5 g•cm.
Tape Pass Fine Adjustment (×1.5FWD Mode)
When replacing any drum related parts, be sure to perform this ad-
justment.
Adjustment Method:
1. Connect the CH-1 terminal of an oscilloscope to TP (RF) and
the CH-2 terminal to TP (SWP) on the DIGITAL board.
2. Enter the Test Mode 1(see page 19.) and set the test tape TY-
7252 (8-909-822-00).
3. Press the AMS (+) key.
Role of each switch in test mode.
WIRED OFF
OFFSET
WIRELESS
–0 +
STANDARD LONG
ATF : ON ATF : OFF
REMOTE REC MODE
48k 44.1k
4. Put the REC MODE switch to the LONG (ATF: OFF) position
and put the REMOTE switch to either the WIRED or WIRE-
LESS position (OFFSET: – or +), fine adjust both the S1 guide
and T1 guide so that the RF signal waveform of the oscillo-
scope repeatedly contracts and expands in vertical directions as
it has the same shape.
* Adjust the direction of tightening to complete this adjustment.
If there is curl on any of the upper and lower flanges of the
S2, T2 and F guides, adjust the guide of concern.
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– 22 –
5. Put the REC MODE switch to the STANDARD 48k (ATF: ON)
position and put the REMOTE switch to either the WIRED or
WIRELESS position (OFFSET: – or +), then check the RF sig-
nal waveform.
A
NG
A'
NG
OK
5
4A’or les
s
5
4A or less
6. Put the REC MODE switch to the STANDARD 48k (AFT: ON)
position and put the REMOTE switch to the OFF position (OFF-
SET: 0), then check the RF signal waveform.
(1) Verify that the peak value (B) of the RF signal waveform is
60mV or more.
(2) Verify that the flat position of the RF signal waveform has
undershoots of 10% or less.
Check that there is a difference of 650 ± 15 µsec between the
oscilloscope’s SWP signal and the RF signal.
B
B
10 or less B
10 or less
7. If any of the specified values are not satisfied, repeat items 3 to
6.
Adjustment Location: See page 20.
DPG Adjustment
When replacing any drum related parts, be sure to perform this ad-
justment.
Adjustment Method:
1. Connect the CH-1 terminal of an oscilloscope to TP (RF) and
the CH-2 terminal to TP (SWP) on the DIGITAL board.
2. Enter the Test Mode 1(see page 19.) and set the test tape TY-
7252 (8-909-822-00).
3. Put the REC MODE switch to the STANDARD 48k (ATF: ON)
position and put the REMOTE switch to the OFF position (OFF-
SET: 0).
4. Press the AMS (+) key.
5. Press the PLAY (”) key.
6. “DPG OK” is displayed in the fluorescent indicator tube.
RF
SW
P
650
±
15
µ
sec
Adjustment Location: See page 23.
CHECK AND REPLACEMENT FOR DATE FNCTION
Clock IC Back-up Check
•When replacing the lithium battery (BATT501) or replacing any
of the clock IC (IC518) and peripheral parts, the clock will be
reset.
(The DATE display will be [‘-- -- --] [--h--m--s] even when the
[PRESENT] button is pushed.)
Perform the back-up check by the following procedure.
(1) Connect a DC voltmeter between the DIGITAL board’s TP
(BATT+) as (+) side on the TP (BATT–) as (–) side.
(2) With the POWER switch of the set OFF, check that the volt-
age (1) is less than +20 mV.
(If the measured value is more than +20 mV, inspect the IC518
and peripheral parts and replace as needed.)
(3) With the POWER switch of the set ON, check that the volt-
age (1) is less than 0 mV (minus indication), (If plus indica-
tion, inspect the D510 and peripheral parts and replace as
needed.)
(4) When these voltages are normal, set the clock to the current
date and time according to the instruction manual.
(year/month/day/day of week/hours/minutes/seconds)*
(5) After the clock is set in item (4), turn off the POWER switch
once and in several seconds, turn on the power again and
make sure that the clock is operating.
Adjustment Location: See page 23.
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– 23 –
Replacement of Back-up Battery
The back-up battery for clock is designed to serve for more than
seven years under normal service conditions (room temperature and
ordinary humidity).
When replacing the battery, take note of the following:
•Perform the above “Clock IC Back-up Check” and remedy the
cause of battery consumption.
•The open voltage of the battery as removed is 3.0V or more when
it is new. If this voltage is 2.0V or less, then battery is fully con-
sumed and needs to be replaced.
•After the battery is replaced, perform the “Clock IC Back-up
Check” again and set the clock.
•The coin type lithium battery (CR2032) is used for replacement.
* For description of the clock setting, see page 5.
Adjustment and Check Locations :
DIGITAL board – component side –
(S-END)
RV502 (T-END)
RV501
TP
(RF)
TP
(SWP)
TP
(T-END)
TP
(S-END) TP
(BATT+)
TP
(BATT–)
TP
MAIN–
TEST
END SENSOR ADJ
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4
2
9
8
T
E
L
1
3
9
4
2
2
9
6
5
1
3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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