CROWN older_ce_technotes_124 Datasheet

Page 1

Tech Note

Technical Support Group

Audio Products by Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000 Ph 800-342-6939/219-294-8200 Fax 219-294-8301 www.crownaudio.com

Issue Date: 11 Feb 00 Ref. No.: 0153 Rev.E Page 1 of 2 Subject: Timing/Mute Capacitors Applicability: CE 1000, CE2000, UT-1010, & UT-2020

CONDITION:

Some early model CE amplifiers may not come out of standby upon power up. When this happens, the fault light will continue to flash on and off indicating that there is a fault condition related to the amplifier. It is likely that the problem may be the formation of condensation under the timing and mute capacitors C121/221/C124/224.

This problem has only occured on PWA's manufactured before November 1998. Main modules for CE1000 (PWA102138-9 and later) and CE2000 (PWA102140-9 and later) have this problem corrected. The timing circuit in the current production modules have been rescaled to a lower impedance and

utilizes an electrolytic capacitor in the timing circuit. The previous revision of this Tech Note (153 Rev.D) described the application of conformal coat after preparation of the circuit board and replacement of specified components. The procedure in this revision (Rev.E) has been modified to utilize leaded ceramic capacitors in place of surface mount components. Conformal coat is also no longer necessary as a result of this revision.

Resistors R5, R6, and R18 need to be upgraded on PWA 102139-5, 102140-5, 102139-6, and 102140-6.Resistors R5, R6, and R18 need to be upgraded on PWA 102139-5, 102140-5, 102139-6, and 102140-6.

Resistors R5, R6, and R18 need to be upgraded on PWA 102139-5, 102140-5, 102139-6, and 102140-6.

Resistors R5, R6, and R18 need to be upgraded on PWA 102139-5, 102140-5, 102139-6, and 102140-6.Resistors R5, R6, and R18 need to be upgraded on PWA 102139-5, 102140-5, 102139-6, and 102140-6. Resistors R6 and R18 need to be upgraded on PWA 102139-8 and 102140-8.Resistors R6 and R18 need to be upgraded on PWA 102139-8 and 102140-8.

Resistors R6 and R18 need to be upgraded on PWA 102139-8 and 102140-8.

Resistors R6 and R18 need to be upgraded on PWA 102139-8 and 102140-8.Resistors R6 and R18 need to be upgraded on PWA 102139-8 and 102140-8. Resistor R29 should be removed from -5,-6, and -8 PWA's, and not replaced.Resistor R29 should be removed from -5,-6, and -8 PWA's, and not replaced.

Resistor R29 should be removed from -5,-6, and -8 PWA's, and not replaced.

Resistor R29 should be removed from -5,-6, and -8 PWA's, and not replaced.Resistor R29 should be removed from -5,-6, and -8 PWA's, and not replaced.

P ART DESCRIPTION:

R5; 6.98k Ohm 1% (CPN A11368-69811)R5; 6.98k Ohm 1% (CPN A11368-69811)

R5; 6.98k Ohm 1% (CPN A11368-69811)

R5; 6.98k Ohm 1% (CPN A11368-69811)R5; 6.98k Ohm 1% (CPN A11368-69811) R6; 9.31k Ohm 1% (CPN A11368-93111)R6; 9.31k Ohm 1% (CPN A11368-93111)

R6; 9.31k Ohm 1% (CPN A11368-93111)

R6; 9.31k Ohm 1% (CPN A11368-93111)R6; 9.31k Ohm 1% (CPN A11368-93111) R18; 7.15k Ohm 1% (CPN A11368-71511)R18; 7.15k Ohm 1% (CPN A11368-71511)

R18; 7.15k Ohm 1% (CPN A11368-71511)

R18; 7.15k Ohm 1% (CPN A11368-71511)R18; 7.15k Ohm 1% (CPN A11368-71511) C121, C124, C221, C224; .47mf 50V (CPN C 6802-0)C121, C124, C221, C224; .47mf 50V (CPN C 6802-0)

C121, C124, C221, C224; .47mf 50V (CPN C 6802-0)

C121, C124, C221, C224; .47mf 50V (CPN C 6802-0)C121, C124, C221, C224; .47mf 50V (CPN C 6802-0)

SOLUTION:

(1) Desolder R5(1) Desolder R5

(1) Desolder R5,

(1) Desolder R5(1) Desolder R5 (2) Desolder R6(2) Desolder R6

(2) Desolder R6

(2) Desolder R6(2) Desolder R6 (3) Desolder and remove R29. This circuit location will remain open.(3) Desolder and remove R29. This circuit location will remain open.

(3) Desolder and remove R29. This circuit location will remain open.

(3) Desolder and remove R29. This circuit location will remain open.(3) Desolder and remove R29. This circuit location will remain open. (4) De-solder and remove capacitors C121/124/221/224.(4) De-solder and remove capacitors C121/124/221/224.

(4) De-solder and remove capacitors C121/124/221/224. The circuit locations for the capacitors have small

(4) De-solder and remove capacitors C121/124/221/224.(4) De-solder and remove capacitors C121/124/221/224. holes in the pads allowing the new components to be inserted. These holes must be open to allow the leads of the replacement capacitors to completely pass through the board and be soldered from the top side of the circuit (Figure 1). (5)(5)

Thoroughly remove all residual adhesiveThoroughly remove all residual adhesive

(5)

Thoroughly remove all residual adhesive on the circuit board. Caution: Any remaining adhesive may act

(5)(5)

Thoroughly remove all residual adhesiveThoroughly remove all residual adhesive

to absorb moisture and repeat the conditions described above.

(6)(6)

Clean the afClean the af

(6)

Clean the af

(6)(6)

Clean the afClean the af alcohol. Using anything else can result in damage to the circuit board and components. It is critical that the module be both CLEAN AND DRY. After the module is clean, it must be allowed sufficient time to dry out. If necessary, a hair dryer on low heat or air gun at low pressure may be used to assist in the drying process.

R6, R6,

andand

R6,

and

R6, R6,

andand

and R18and R18

and R18

and R18and R18

fected arfected ar

fected ar

fected arfected ar

R18R18

on -5 and -6 PWA's.on -5 and -6 PWA's.

R18

on -5 and -6 PWA's.

R18R18

on -5 and -6 PWA's.on -5 and -6 PWA's.

on -8 PWA's.on -8 PWA's.

on -8 PWA's.

on -8 PWA's.on -8 PWA's.

ea.ea.

ea. This should be done using a soft bristle brush and a high grade IPA isopropyl

ea.ea.

Page 2

Tech Note

Technical Support Group

Audio Products by Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000 Ph 800-342-6939/219-294-8200 Fax 219-294-8301 www.crownaudio.com

Issue Date: 11 Feb 00 Ref. No.: 0153 Rev. E Page 2 of 2 Subject: Timing/Mute Capacitors Applicability: CE 1000, CE2000, UT-1010 & UT-2020

(7)(7)

(7) Prepare the new capacitors so the body of the capacitor is touching the circuit board and the leads pass

(7)(7) through the board so they can be soldered (Figure 1). (8) Upgrade and solder(8) Upgrade and solder

(8) Upgrade and solder

(8) Upgrade and solder(8) Upgrade and solder outlined in Figure 2. (9) Upgrade and solder R5(9) Upgrade and solder R5

(9) Upgrade and solder R5; 6.98k Ohm 1% (CPN A11368-69811),

(9) Upgrade and solder R5(9) Upgrade and solder R5 andand

R18;R18;

and

R18; 7.15k Ohm 1% (CPN A11368-71511)

andand

R18;R18;

(10) Upgrade and solder R6(10) Upgrade and solder R6

(10) Upgrade and solder R6; 9.31k Ohm 1% (CPN A11368-93111),

(10) Upgrade and solder R6(10) Upgrade and solder R6

71511) (11) (11)

(11) Mount and reconnect the PWA in the chassis and test for proper operation.

(11) (11)

on -8 PWA's.on -8 PWA's.

on -8 PWA's.

on -8 PWA's.on -8 PWA's.

C121/221/124/224;C121/221/124/224;

C121/221/124/224; .47 50V axial ceramic capacitors (CPN C 6802-0) in the locations

C121/221/124/224;C121/221/124/224;

R6; R6;

R 6; 9.31k Ohm 1% (CPN A11368-93111),

R6; R6;

on -5 and -6 PWA's.on -5 and -6 PWA's.

on -5 and -6 PWA's.

on -5 and -6 PWA's.on -5 and -6 PWA's.

and R18and R18

and R18; 7.15k Ohm 1% (CPN A11368-

and R18and R18

Figure 1

(Top of circuit board)

___________ ___________ ___________ ___________

(CPN C 6802-0)

C124 C224

(Bottom Side of Main Module)

Figure 2

C121 C221

Page 3

Tech Note

Technical Support Group

Audio Products by Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000 Ph 800-342-6939/219-294-8200 Fax 219-294-8301 www.crownaudio.com

Issue Date: 25 Mar 99 Ref. No: 0156 REV A page 1 of 1 Subject: Bootstrap Resistor Modification

Applicability: CE 1000, CE 2000, Ultra-Tech 1010, Ultra-T ech 2020, S3 and M-240 amplifiers con-

taining the following main boards: CPN 102139-5, CPN 102140-5, CPN 102140-6, CPN 102140-8, CPN 102140-9 and

CPN 127354-1

Diagnosis: Perform this modification on all listed boards for any amplifiers retained for servic-

ing. This modification is required to create a voltage-divider network to divert excess wattage from key main board components. Check first to verify if previous modification has already been performed. Previously installed bootstrap resistor may be located on main board top next to C1 capacitor (original 0156 procedure), or may be spliced into the bootstrap supply wire (0156 REV A procedure).

Part Description: 1k Ohm, 5 Watt resistor (CPN 127442-1)

Clip (CPN 127439-1)

PROCEDURE

1 Locate the bootstrap supply wire. This white wire runs from the bridge rectifier to WP6 on the main board.

11 22

2 Cut bootstrap supply wire approximately 6 inches (15 cm) from the end connected to the bridge rectifier . This

will be approximately 8 inches (20 cm) from the end connected to the main board at WP6.

3 Prep resistor. Hook both leads as shown in Figure 1.

33 44

4 Strip and prep both cut ends of the bootstrap supply wire. Slip a 1-inch length of 4-mm shrink tubing over

the cut end of each wire. Slide back to expose cut end. Hook each wire in preparation for soldering (Figure 1).

5 Solder each prepared end of the white bootstrap supply wire to the resistor .

55 66

6 Slide shrink tubing over solder joints and set in place using a heat gun. See Figure 2

66 77

7 Slide supplied clip over resistor and mount in amplifier on the corner of transformer closest to the power supply

capacitors using existing bolt. See Figure 3.

FigurFigur

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Figur

e 1

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Figur

FigurFigur

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e 2

e 2e 2

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e 3e 3

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e 3e 3

Page 4

Tech Note

Technical Support Group

Audio Products by Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000 Ph 800-342-6939/219-294-8200 Fax 219-294-8301 www.crownaudio.com

Issue Date: 3 Nov 99 Ref. No: 0160 page 1 of 2 Subject: Heat sink application on Darlington transistors

for CE Series Amplifers

Applicability: CE1000/2000, CE1000/2000 Euro/UK,

UT1010/2020, M140, M240, S2, and S3

Amplifiers with the following PWAmplifiers with the following PW

Amplifiers with the following PW

Amplifiers with the following PWAmplifiers with the following PW CE 1000, CE 1000 Euro/UK, UT 1010, M140, and S2102139-5, 102139-6 and 102139-8102139-5, 102139-6 and 102139-8

102139-5, 102139-6 and 102139-8

102139-5, 102139-6 and 102139-8102139-5, 102139-6 and 102139-8 CE 2000, CE 2000 Euro/UK, UT 2020, M240, and S3 102140-5, 102140-6, and 102140-8102140-5, 102140-6, and 102140-8

102140-5, 102140-6, and 102140-8

102140-5, 102140-6, and 102140-8102140-5, 102140-6, and 102140-8 Amplifiers with the following PWAmplifiers with the following PW

Amplifiers with the following PW

Amplifiers with the following PWAmplifiers with the following PW CE 1000, CE 1000 Euro/UK, UT 1010, M140, and S2102139-9, and 102139-1, 1127353-1, 127353-2,102139-9, and 102139-1, 1127353-1, 127353-2,

102139-9, and 102139-1, 1127353-1, 127353-2,

102139-9, and 102139-1, 1127353-1, 127353-2,102139-9, and 102139-1, 1127353-1, 127353-2, and serand ser

and ser

and serand ser CE 2000, CE 2000 Euro/UK, UT 2020, M240, and S3102140-9, and 102140-1, 1127354-1, 127354-2,102140-9, and 102140-1, 1127354-1, 127354-2,

102140-9, and 102140-1, 1127354-1, 127354-2,

102140-9, and 102140-1, 1127354-1, 127354-2,102140-9, and 102140-1, 1127354-1, 127354-2, and serand ser

and ser

and serand ser

Conditions: Darlington transistors do not efficiently dissapate heat when fan circuit is idle.

Excessive heat build-up across these transistors may lead to component failure. Discoloration, cold solder connections, and burned circuit traces may be observed as a result of long term over-heating. There may also be other problems caused as a result of these conditions. CarCar

Car

CarCar rr

eplace any componets beforeplace any componets befor

eplace any componets befor

eplace any componets beforeplace any componets befor

equirequir

equir

equirequir

155 Rev B, and 156 Rev A for details.155 Rev B, and 156 Rev A for details.

155 Rev B, and 156 Rev A for details.

155 Rev B, and 156 Rev A for details.155 Rev B, and 156 Rev A for details.

vice rvice r

eplacement PWeplacement PW

vice r

eplacement PW

vice rvice r

eplacement PWeplacement PW

vice rvice r

eplacement PWeplacement PW

vice r

eplacement PW

vice rvice r

eplacement PWeplacement PW

efully inspect cirefully inspect cir

efully inspect cir

efully inspect cirefully inspect cir

e additional updates. Refer to Te additional updates. Refer to T

e additional updates. Refer to T

e additional updates. Refer to Te additional updates. Refer to T

cuit for damage, rcuit for damage, r

cuit for damage, r

cuit for damage, rcuit for damage, r

A's will have (2) Darlington transistorsA's will have (2) Darlington transistors

A's will have (2) Darlington transistors;

A's will have (2) Darlington transistorsA's will have (2) Darlington transistors

A's will have (3) Darlington transistors;A's will have (3) Darlington transistors;

A's will have (3) Darlington transistors;

A's will have (3) Darlington transistors;A's will have (3) Darlington transistors;

A 127321-1A 127321-1

A 127321-1

A 127321-1A 127321-1

A 127323-1A 127323-1

A 127323-1

A 127323-1A 127323-1

e stare star

e star

e stare star

epair traces if necessarepair traces if necessar

epair traces if necessar

epair traces if necessarepair traces if necessar

ting this prting this pr

ting this pr

ting this prting this pr

ech Note 144 Rev A, 153 Rev E,ech Note 144 Rev A, 153 Rev E,

ech Note 144 Rev A, 153 Rev E,

ech Note 144 Rev A, 153 Rev E,ech Note 144 Rev A, 153 Rev E,

ocedurocedur

ocedur

ocedurocedur

e.e.

SpecificSpecific

Specific

e.e.

SpecificSpecific

, and, and

, and

, and, and

PWPW

A'sA's

A's

A'sA's

Page 5

Tech Note

Technical Support Group

Audio Products by Crown International, Inc.

PO Box 1000 Elkhart, IN 46515-1000 Ph 800-342-6939/219-294-8200 Fax 219-294-8301 www.crownaudio.com

Issue Date: 3 Nov 99 Ref. No: 0160 page 2 of 2 Subject: Heat sink application on Darlington transistors

for CE Series Amplifers

Part Description: Darlington transistors Q1, Q2, and Q3, (CPN 102479-1)

Heat sink (CPN 128379-1) Capacitor (CPN C 3679-5)

Procedure: Remove the top cover of the amplifier, locate the Darlington transistors at the

rear of the amplifier near the fan. If there is a 47 Microfarad, 63 Volt capacitor soldered on diode D10, it must be removed and replaced with a 33 Microfarad, 50 Volt capacitor (CPN C 3679-5) to avoid contact with the fan blade when the heat sink is mounted. Throughly clean the mounting surface with alcohol to remove contamination and allow the surface to dry. Remove the liner from the adhesive backing on the heat sink, being careful not to touch the adhesive with your hands. Press the heat sink onto the transistors so they are completely covered and maintain pressure for 5 seconds.

Summary: This procedure substantially reduces the operating temperature of the

Darlington transistors and the possibility of failure due to long term heat stress.