Denon DN-780R Service Manual

SERVICE MANUAL

Hi-Fi Component

MODEL

DN-780R

STEREO CASSETTE TAPE DECK

 Some illustrations using in this service manual are slightly different from the actual set.

16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN

Telephone: 03 (3837) 5321

X0147 NC 0207

SAFETY PRECAUTIONS

The following check should be performed for the continued protection of the customer and service technician.

LEAKAGE CURRENT CHECK

Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the power cord is less than 460 kohms, the unit is defective.

SPECIFICATIONS

Type: Vertical tape loading; 4-track 2-channel stereo double cassette deck

Heads: Recording/playback head (hard permalloy) × 2

Erase head (Double-gap ferrite) × 2

Motors: Capstan (DC servo motor) × 2

Reel (DC motor) × 2

Tape Speed: 4.8 cm/sec.

Variable (PLAY): Approx. ±12%

Fast Forward, Rewind Time: Approx. 110 sec. with a C-60 cassette

Recording Bias: Approx. 105 kHz

Overall S/N Ratio (at 3% THD level): Dolby C NR on: more than 74 dB (CCIR/ARM)

Overall Frequency Response: 20~18,000 Hz ±3 dB (at −20 dB, Metal tape)

Channel Separation: More than 40 dB (at 1 kHz)

Wow & Flutter: 0.06% WRMS, ±0.14% w.peak

Input LINE: 50 mV (input level at maximum)

Input impedance: 240 kohm unbalanced

MIC: 0.775 mV (mic level at maximum)

Output LINE: 775 mV (0 dB)

(with 47 kohm load, recorded level of 200 nWb/m)

PHONES: 7 mW output level at maximum

(optimum load impdance 8 ohm~1.2 kohm)

Power Supply: 33 W

Dimensions: 438 (W) × 134 (H) × 275 (D) mm

Wehght: 6.5 kg (14 lbs 5 oz)

Installation: 19-inch rack mountable (3U)

DN-780R

* For improvement purposes, specifications and functions are subject to change without advanced notice.

■ Dolby noise reduction and HX Por headroom extension manufactured under license from Dolby Laboratories Licensing Corporation. HX pro originated by Bang & Olufsen.

■ “DOLBY”, the double-D symbol

and “HX Pro” are trademarks of Dolby Laboratories Licensing Corporation.

2

DISASSEMBLY

2

4

( Follow the procedure below in reverse order when reassembling. )

1. Top Cover

(1) From both sides, remove 4 screws 1, Bracket, and

2 screws

(2) Remove 3 screws 3 on the rear, then detach the

Top Cover to the arrow direction.

.

2

1

DN-780R

3

2

2. Front Panel

(1) Remove 2 screws 4 and 3 screws 5 from top

and bottom of the Front Panel.

(2) Disconnect the wire and 3 connectors from the

Cassette Mecha., then detach the Front Panel to the arrow direction.

(3) Remove the screw

(4) Disconnect FFC.

(5) From the Cassette Mecha., disconnect

2 connectors.

(6) Remove 2 screws

SWB UNIT.

to free earth wire.

6

7

to detach the SWA UNIT and

SWA UNIT

Wire

1

4

Connector

5

7

Connector

6

Earth Wire

FFC

Connector

7

SWB UNIT

3

3. DISPLAY P.W.B./VOLUME P.W.B.

(1) Pull out 6 knobs on the front.

(2) Remove 9 screws 8 on the DISPLAY P.W.B.

9

(3) Remove 2 screws

on the MIC UNIT.

knob

DN-780R

DISPLAY P.W.B.

8

9

MIC UNIT

knob

4. Cassette Mecha. A & B

Remove 4 screws  each on both Cassette

Mecha. A and B.

5. Cassette Door

(1) Take off the Cassette Window on the front.

(2) Remove the screw  to detach

the Mini-damper.



(3) Remove the screw

Bracket.

(4) With pushing the shaft in the arrow directions,

no spring side first, detach the Cassette Door.

to detach the Door

Cassette Mecha. A



Cassette Mecha. B



Cassette Window



Mini-damper

Spring



Door Bracket

Cassette Door

Shaft

4

6. Audio P.W.B.

(1) From the Audio P.W.B., disconnect the connector.

(2) Remove 3 screws !.

"

(3) Remove 4 screws

and # each on the rear.

DN-780R

!

Audio P.W.B.

!

#

"

7. Power P.W.B.

(1) Disconnect the power connector.

$

(2) Remove the screw

(3) Release the P.W.B. holder.

and 4 screws %.

Connector

%

Power Connector

$

P.W.B. Holder

5

BLOCK DIAGRAM

(Option)

DN-780R

1 5678

32

4

A

B

C

D

E

6

LEVEL DIAGRAMS

XLR -17.5dB

MIC -62dB

DCA -24dB

-24.5dB

-8.2dB

-19dB

+2.5dB(METAL) +1dB (CHROME)

-1dB (NORMAL)

+2.5dB

-10dB

-50dB

-60dB

-70dB

-20dB

-40dB

-30dB

0dB

(dBV)

IC103(403)

HA12170

IC605(606)

XLR

7(1)

IC707(708) VR804(805)

VR103(403)

IC108(408) IC110(410)

RCA

1(7) 30(1) 16(15) 1(7)

IC807

7(1)

IC801(805)

7

LINE IN

MIC

ACD 780 (Option)

0dB=0.775V * MIC MIDE = REC MIC AGC = OFF

RECORDING SYSTEM INPUT FREQUENCY 400Hz

DN-780R

1 5678

32

4

A

B

C

D

E

7

DN-780R

-71dB

-19dB

-28dB

+4dB(XLR) 0dB(RCA)

-5dB(HEAD PHONE)

-10dB

-50dB

-60dB

-70dB

-20dB

-40dB

-30dB

0dB

(dBV)

0dB=0.775V

IC103(403)

HA12170

XLR

TR101(401)

VR101(401)

IC105(405)

IC601(603)

LOAD

600 ohm

LOAD

33 ohm

IC104(404)

IC101(401)

NJM2068

3(5)

1(7)

1(7) 1(7)

28 (3)

22

(9)

LINE OUT

HEAD PHONE

RCA

ACD 780 (Option)

PLAYBACK SYSTEM

TCC-130 DOLBY B-TYPE

1 5678

32

4

A

B

C

D

E

8

ADJUSTMENT

ADJUSTING AND CHECKING THE MECHANISM SECTION

1. Replacing Pinch Roller

Before replacing the pinch roller, clean the tape contact surface of the pinch roller and the capstan shaft. Most causes of poor tape transport can be traced to dirty pinch roller and capstan shaft.

Removing the pinch roller Remove the clips that press the pinch roller and pull the pinch roller forward remove it. After replacing, run a padles C-90 tape to check for tape curls at the tape guide section of the head.

DN-780R

Capstan shaft

Pinch roller

2. Checking the pressure Force of the Pinch Roller

In the playback mode, hook a spring weight onto the bracket at the center of the pinch roller. After separating the pinch roller from the capstan shaft allow the pinch roller to contact the capstan shaft again. Check to make sure the spring weight reads between 250 ~ 350g when the pinch roller starts to rotate. Replace the pinch roller when it does not conform to the standard specification values.

3. Replacing the Head Ass'y

(1) Removing the head Ass'y

1. Remove the head base mounting screws.

2. Remove the head base from the lead holder and the wire connectors.

(2) Head Ass'y Installation

1. Assembly is the reverse of disassembly.

4. Adjusting the R/P HEAD

Azimuth adjustments Set test tape A-BEX TCC-153 so that the A surface faces forward, and adjust accordingly. (1) Playback FWD. Turn the azimuth adjustment nut so

that the Lissajous waveform (A) is at maximum scale and the Lissajous waveform (B) is at minimum scale.

(2) Playback REV. Turn the azimuth adjustment nut in

the same manner as (1), above. (3) Make further adjustments to (1) and (2), above. (4) Apply torsion locks to the adjusted nuts.

Note: Only the azimuth adjustment is necessary; no height

and tilt angle adjustments are required.

A-BEX TCC-153

PB Amp

L

R

LINE OUT

250 ~ 350g

A

B

V H

R/P Head

FWD REV

9

DN-780R

5. Checking the Take-up Torque

Load the cassette type torque meter

FWD side .........SONY TW2111A

REV side ..........SONY TW2121A

Check to make sure that the average torque meter reading is within 30 ~ 70g-cm during playback. If it is not within this range, check the voltage (approx. 4V) of the reel motor. After the verification, replace the reel motor if there is no problem with the voltage value.

6. Checking the FF and REW Torques

Load the cassette type torque meter (SONY TW2231). Check to make sure the torque meter indicates within 90 ~ 180g-cm at the end of FF and REW.

7. Checking the Back Tension Torque During Record/Playback

Load the cassette type torque meter

FWD side .........SONY TW2111A

REV side ..........SONY TW2121A

Check to make sure the torque meter reads between 2 ~ 6g-cm during playback and that there is no unevenness.

8. Checking the FF and REW Times

Load a C-60 cassette tape (TDK AC-514); check to make sure the tape is fast forwarded or rewound within 85 ~ 115 seconds. If it is not within this range, check sections 5 and 7.

9. Checking the Operation of the Erase Prevention, Metal and Chrome Switch

Confirm that the sensor arm properly detecting the tape type detection holes on the cassette housing.



 Caution on adjusting



(1) Before adjusting, clean the head surface, capstan and

the pinch roller with a gauze or cotton swab moistened with alcohol.

(2) Demagnetize the R/P HEAD and the E HEAD with a

head eraser. (3) Completely demagnetize the adjustment screwdriver. (4) Unless instructed otherwise, set the various controls

as follows:

INPUT volume ....................... maximum

DOLBY NR button ................. OFF

TAPE SPEED-A (-B) .............Center click position

PHONES SELECT ................MIX

INPUT SELECT .................... LINE B

1. Tape Transport Check

Load the transport check cassette. In the operational mode, illuminate the fixing guides of the R/P HEAD with a lamp and check to make sure the tape edge does not come in contact with the tape guide section. The tape transport is the most important element in determining the performance of a cassette deck. Avoid moving the various adjustment screws, nuts, etc., as much as possible. Refer to the pages on "Adjusting and Cheking the Mechanism Section" when replacing or adjusting the R/P HEAD.

2. Adjusting the Azimuth

(1) After completing the tape transport check, load the

test tape (A-BEX TCC-153). (2) Playback (both FWD side and REV side) the test tape;

adjust the azimuth screw so that section A of the

Lissajous waveform is maximum and section B is

minimum.

ADJUSTING THE ELECTRICAL SECTIONS



 Measuring instruments necessary for



adjustments

(1) Audio signal generator (2) Variable resistance attenuator (3) Electronic voltmeter (4) Oscilloscope (5) Frequency counter (6) Adjustment screwdriver. (7) Trap coil adjustment square stick (8) Test tapes (SONY TY-224)

(A-BEX TCC-130, TCC-153, TCC-262B/162B) (TDK AC-514)

(9) Transport Check cassette tape (A-BEX TCC-902)

A-BEX TCC-153

FWD REV

PB Amp

L

R

LINE OUT

R/P Head

A

V H

B

10

3. Checking and Adjusting the Tape Speed

(1) Connect the frequency counter to the LINE OUT

terminal and load test tape (SONY TY-224).

(2) Load cassette tapes on both cassette decks A and B.

Next, on the deck (A or B) whose speed is to be adjusted, while holding down the buttons of deck A together, press the POWER switch. After the power has been on for about two seconds, the Remote Control Indicator " " in Display will light up and the cassette deck will begin to play in speed adjustment mode. (Speed adjustments can not be made, unless this mode is first selected.)

(3) First high speed adjustments, press the DUBBING

SPEED "HIGH" Button and use VR101 for Casette Deck A and VR102 for Cassette Deck B. (Note that speed adjustment mode is cancelled when the tape is ejected.)

(4) After completing high speed adjustments, press the

DUBBING SPEED "HIGH" Button again then tape speed is slow (Normal speed). And start normal speed adjustments, use Control Unit VR103 for Cassette Deck A and VR104 for Cassette Deck B.

, , and

SONY TY-224

Mode

Normal

speed

High

speed

PB Amp

LINE OUT

Adjusting volume

A/B

A

B

A B

number

VR-103

VR-104

VR-101 VR-102

DN-780R

F. Counter

F.

counter

(Hz)

3005±5

6010±10 6010±10

4. Playback System Adjustment

(1) Playback level

Playback a test tape for Dolby standard level (A-BEX TCC-130). Adjust (Lch) and (Rch) so that the LINE OUT terminal level is at 0 dB (775 mV).

(2) Verifying playback frequency characteristics

Playback the test tape (A-BEX TCC-262B/162B) and verify that the frequency characteristics conform to the specified standard.

Note: Before checking the playback frequency response,

first adjust the azimuth using the 8 kHz signal at the beginning of the test tape (A-BEX TCC-262B). Also, after checking the playback frequency, make sure to readjust the azimuth with the test tape (A-BEX TCC-153) and then lock the adjustment screw.

Playback frequency characteristics

(db)

+6

+

5

4

+

+3

+2

1

+

0

1

−

−2

3

−

−4

−5

6

−

20

10050

200

500

Playback Level

DECK L/R

A

B

A-BEX TCC-130

A-BEX TCC-262B/162B

1 k

Adjusting volume number

L VR-101

R

L R

PB Amp

2 k

Tape: A-BEX TCC-262B/162B

VR-102

VR-401 VR-402

LINE OUT

5 k

10 k 12 k

V.V

20 k (Hz)

11

DN-780R

5. Recording System Adjustment

5-1. Adjusting recording/playback comprehensive

frequency characteristics. (1) Load a test tape TDK AC-514.

Record with a -20 dB 1 kHz input level signal into the LINE IN terminal and playback.

(2) Make a sample recording using a 12 kHz input

signal and playback this recording. Adjust (left channel) and (right channel) so that they conform to the following specified characteristics.

(db)

+6

+5

+

4

+

3

2

+

+1

0

−1

−2

−3

−4

5

−

6

20

Record/Playback Overall Frequency Response

10050

200

500

ATT

Frequency Responce

DECK L/R

L

A

B

1 k

R

L R

2 k

Tape Dolby NR Level

REC Amp

LINE IN

LINE OUT

V.V

PB Amp

Adjusting volume number

5 k

: AC-514 : Off

: −20 dB From Dolby Level

VR-105

VR-106

VR-405 VR-406

10 k 12 k

20 k (Hz)

5-2. Recording/Playback Level Adjustment

(1) Load the test tape TDK AC-514. Make a sample

recording with the 1 kHz (-20 dB) signal and play this section back.

(2) Adjust (Lch) and (Rch) so that the output from

LINE OUT terminal is the same as the output at recording monitoring time.

5-3. Dolby C recording and playback comprehensive

frequency characteristics verification (1) Set the Dolby NR switch at "C" position. (2) Use a test tape TDK AC-514 and record and

playback as in item 5-1 to verity that they satisfy the characteristics standards.

Dolby C Record/Playback Overall Frequency Response

(db)

6

+

+5

4

+

+3

2

+

1

0

−1

−

2

3

−

−4

5

−

−6

20

10050

200

500

R/P Level Adjustment

DECK L/R

L VR-103

A

B

1 k

R

L R

2 k

Tape Dolby NR Level

Adjusting volume number

5 k

VR-104

VR-403 VR-404

10 k 12 k

20 k (Hz)

: AC-514 : On C

: −20 dB From Dolby Level

12

DN-780R

MECHANISM OPERATING TIME CHECK

The total operating time of the mechanism is registered in this unit. Check and refer to it when replacing the mechanism, head, or motor.

1. Displaying the Operating Time

(1) Set the power to on while pressing the “STOP ( )”, “RESET”, and “MEMO” buttons of the Deck A together. (2) The and buttons of the Deck A are used to switch the display for the Deck A mechanism or for the Deck B mechanism.

Ex.: The operating time of the Deck A mechanism

Operating time (unit: hour)

The operating time of the Deck B mechanism

Operating time (unit: hour)

* “FuLL” is displayed when exceeding “9999”.

2. Deleting the Operating Time

When replacing the associated parts, delete the registered operating time as follows. Press the “COUNTER MEMO” and “RESET” buttons of the Deck A together at once. The displayed mechanism operating time of the selected Deck is set to “0000”.

13

SEMICONDUCTORS



 IC’s



DN-780R

MN102L62G (IC105)

µµ

µCOM

µµ

75

76

100

1

51

50

26

25

MN102L62G Terminal Function

Pin No.

1 P60, WAIT PRECSEL O  Pd L L

2 P61, _RE PIRINH O  Pd L L

3 P62, _WEL PMASTER O  Pd L L 4 P63, _WEH PSLAVE O  Pd L L 5 P50, _CS0 PSWMST I  Pu H  Selection switch. L: MASTER /H: Other 6 P51, _CS1 PSWSLV I  Pu H  Selection switch. L: SLAVE /H: Other 7 P52, _CS2 PSWADLB I  Pu H  Selection switch. L: Dolby B /H: Other 8 P53, _CS3 PSWADLC I  Pu H  Selection switch. L: Dolby C /H: Other

9 P54, _BREQ PSWBDLB I  Pu H  Selection switch. L: Dolby B /H: Other 10 P55, _BRACK PSWBDLC I  Pu H  Selection switch. L: Dolby C /H: Other 11 12 P57, _WORD Reserved I  0V L  Not used. 13 P20, A00 PRMUTB O  Pu H H B mechanism REC MUTE change signal. H: MUTE ON 14 P21, A01 PDOLOFB O  Pd L L B mechanism Dolby on / off change signal. H: Dolby OFF 15 P22, A02 PDOLBCB O  Pu H H B mechanism Dolby B / C change signal. H: Dolby B 16 P23, A03 PDOLSWB O  Pd L L B mechanism Dolby Switch change signal. H: PLAY mode 17 Vdd Vdd Power supply (+5V) 18 SYSCLK SYSCLK O OSCI ×1/2 is outputted. 19 VSS VSS GND(0V) 20 XI XI I  0V L L Not used. It connects with GND. 21 XO XO Not used. OPEN 22 VDD VDD Power supply (+5V) 23 OSCI OSCI I There is 0.16% of an error by baud rate 9600bps setup 24 OSCO OSCO O OSCI is outputted. 25 MODE MODE I H: Single tip mode 26 P24, A04 PRMUTA O  Pu H H A mechanism REC MUTE change signal. H: MUTE ON 27 P25, A05 PDOLOFA O  Pd L L A mechanism Dolby on / off change signal. H: Dolby OFF 28 P26, A06 PDOLBCA O  Pu H H A mechanism Dolby B / C change signal. H: Dolby B 29 P27, A07 PDOLSWA O  Pd L L A mechanism Dolby Switch change signal. H: PLAY mode 30 P30, A08 PRSVI1 I  Pu H  Preliminary input terminal 1 31 P31, A09 PRSVI2 I  Pu H  Preliminary input terminal 2 32 P32, A10 PRSVI3 I  Pu H  Preliminary input terminal 3 33 P33, A11 PRSVI4 I  Pu H  Preliminary input terminal 4 34 VDD VDD Power supply (+5V) 35 P34, A12 Reserved I  0V L  Not used. 36 P35, A13 Reserved I  0V L  Not used. 37 P36, A14 Reserved I  0V L  Not used.

Pin Name

P56, ALE, _ALE, _BSTRE

Reserved I  0V L  Not used.

Symbol

I/O

DET Ext Ini Res

Recording selection to B mechanism. L: Slide switch setup / H: Deck A line in

Infrared remote control selection. L: Infrared remote control use is possible./ H: Infrared remote control use is impossible.

MASTER function setup, turns on at the time of DUPLICATE operation. SLAVE function setup, turns on at the time of DUPLICATE operation.

Function

14

DN-780R

Pin No.

38 P37, A15 Reserved I  0V L  Not used. 39 P40, A16 PSCL O  Pu H H EEPROM communication clock signal.

40 P41, A17 PSDA I/O  Pu H In

41 P42, A18 PSELEEP I  Pd L L

42 P43, A19 PMIX O  Pd L L A mechanism line out. H: The mix output of A+B 43 VSS VSS GND(0V) 44 P44, AN4, A20 PKIN2 I Lv Pu H  A / D conversion is used. 45 P45, AN5, A21 PREMO I Lv Pu H  A / D conversion is used. 46 P46, AN6, STOP, A22 PADINRB I Lv Pd L  A / D conversion is used. 47 48 P80, TM0IO PRECR I  Pu H  Mechanism input signal. H: REC of RVS is improper. 49 P81, TM1IO PRECF I  Pu H  Mechanism input signal. H: REC of FWD is improper. 50 P82, TM2IO PHALH I  Pu H  Mechanism switch. H: No tape. 51 P83, TM3IO PSWCOM O  Pu H H Mechanism scan signal. H: A mechanism selection 52 P84, TM4IO PDUB O  Pd L L Duplicate output signal. H: Duplicate 53 P85, TM5IO PRSVO4 O  0V L L Preliminary output terminal 4 54 VDD VDD Power supply (+5V) 55 P86, TM6IOA PRMTOUT O  Pu H H Remote output signal. 56 P87, TM6IOB Reserved I  0V L  GND(0V) and connection. 57 P90, TM6IC PQSENA I  Pu H  58 P91, TM7IOA PQSENB I  Pu H  59 P92, TM7IOB PRSVO1 O  0V L L Preliminary output terminal 1 60 P93, TMI7IOC PRSVO2 O  0V L L Preliminary output terminal 2 61 VSS VSS GND(0V) 62 P94, AN0 PADINRA I Lv Pd L  A / D conversion is used 63 P95, AN1 PADINLA I Lv Pd L  A / D conversion is used 64 P96, AN2 PKIN0 I Lv Pu H  A / D conversion is used 65 P97, AN3 PKIN1 I Lv Pu H  A / D conversion is used 66 VDD(VPP)VDD Power supply (+5V) 67 P70, SBT0 _PFLNCS O  Pu H H Connects with NCS. L: Select 68 P71, SBI0 RxD I  Pu H  It is used as a serial port. (It is 9615.38bps in 20MHz.) 69 P72, SBO0 TxD O  Pu H H It is used as a serial por t. (It is 9615.38bps in 20MHz.) 70 P73, SBT1 PFLCLK O  Pu H H Connects with a clock. 71 P74, SBI1 PFLRD I  Pu H  Connects with SDO. (Key input data) 72 P75, SBO1 PFLSD O  Pu H H Connects with SDI 73 TEST1 TEST1 I  Pu A pull-up is carried out by 47k. (Recommendation) 74 TEST2 TEST2 I  Pu A pull-up is carried out by 47k. (Recommendation) 75 _NMI _NMI I  Pu H  A pull-up is carried out.

76 PA0, _IRQ0 PPLSB I Ed Pu H 

77 PA1, _IRQ1 PPLSA I Ed Pu H 

78 PA2, _IRQ2 PPOFF I  Pu H  79 PA3, _IRQ3 PEXTIN I  Pu H  EXT. IN input signal. 80 PA4, _IRQ4 PREMOTE I Ed Pu H  RC-5/Infrared remote signal input. 81 PA5, DSEP PEXTOUT O  Pu H H EXT.OUT output signal. 82 _RST _RESET I Lv  L  Reset signal. L: Reset 83 VDD VDD Power supply (+5V)s 84 P00, D00, AD00 PSOLHB O  Pd L L B mechanism solenoid hold signal. H: Hold 85 P01, D01, AD01 PSOLKB O  Pd L L B mechanism solenoid kick signal. H: kick 86 P02, D02, AD02 PRELRB O  Pd L L B mechanism reel motor inversion signal. H: Inversion signal ON. 87 P03, D03, AD03 PRELFB O  Pd L L B mechanism reel motor rotation signal. H: rotation signal ON. 88 P04, D04, AD04 PCAPB O  Pd L L B mechanism capstan control signal. H: Capstan motor-on 89 P05, D05, AD05 PBIASB O  Pd L L B mechanism bias signal. H: Bias 90 P06, D06, AD06 PLMUTB O  Pd L L B mechanism line mute signal. L: Mute on 91 P07, D07, AD07 PHIGHB O  Pd L H High speed signal B mechanism. L: High 92 VSS VSS GND(0V) 93 P010, D08, AD08 PSOLHA O  Pd L L A mechanism solenoid hold signal. H: Hold 94 P011, D09, AD09 PSOLKA O  Pd L L A mechanism solenoid kick signal. H: kick 95 P012, D10, AD10 PRELRA O  Pd L L A mechanism reel motor inversion signal. H: Inversion signal ON. 96 P013, D11, AD11 PRELFA O  Pd L L A mechanism reel motor rotation signal. H rotation signal ON. 97 P014, D12, AD12 PCAPA O  Pd L L A mechanism capstan control signal. H: Capstan motor-on. 98 P015, D13, AD13 PBIASA O  Pd L L A mechanism bias signal. H: Bias 99 P016, D14, AD14 PLMUTA O  Pd L L A mechanism line mute signal. L: Mute on

100 P017, D15, AD15 PHIGHA O  Pu L H High speed signal A mechanism. L: High

Pin Name

P47, AN7, WDOUT, A23

Symbol

PADINLB I Lv Pd L  A / D conversion is used.

DET Ext Ini Res

I/O

Function

EEPROM communication data input¾and¾output signal. (The input port of the time of a power supply injection is carried out.)

EEPROM selection signal. L: Old EEPROM(X24C00) H: New EEOPRM(S24C01)

A mechanism leader tape detected signal. L: Leader tape detection. B mechanism leader tape detected signal. L: Leader tape detection.

It counts by DOWN EDGE. It rotates one time at three counts. (DN-770R was taken as one rotation by six pulses by both edge.)

An electric-power-failure detected signal. L: Electric-power-failure detection.

15

MN12510F (IC301)

y

FL DRIVER

DN-780R

33

34

23

22

44

1

MN12510F Terminal Function

No.

1 P21 O Segment output15 (hi-voltage proof output).

2 P20 O LED drive output (hi-voltage proof output).

3 P03 O No connection.

4 P02 O No connection.

5 P01 O Digit output10 (hi-voltage proof output).

6 P00 O Digit output9 (hi-voltage proof output).

7 DGT7 O Digit output8 (hi-voltage proof output).

8 DGT6 O Digit output7 (hi-voltage proof output).

9 DGT5 O Digit output6 (hi-voltage proof output).

10 DGT4 O Digit output5 (hi-voltage proof output).

11 NC

12 DGT3 O Digit output4 (hi-voltage proof output).

13 DGT2 O Digit output3 (hi-voltage proof output).

14 DGT1 O Digit output2 (hi-voltage proof output).

15 DGT0 O Digit output1 (hi-voltage proof output).

16 Vpp I ELP driver power supply, VPP: VDD -35V.

17 NC

18 V

19 OSC1 I Clock oscillation input terminal.

20 OSC2 O Clock oscillation output terminal.

21 Vss I Power supply terminal, Vss: 0V.

22 NCS I Chip select input, “L”: Serial input enable, “H”: Disable.

23 SCK I Clock input for serial transference.

24 SDI O Serial data input terminal.

25 SDO O Serial data output terminal.

26 P30 I Key scan input terminal.

27 P31 I Key scan input terminal.

28 P32 I Key scan input terminal.

29 P33 O LED drive output terminal.

30 P34 O LED drive output terminal.

31 SEG0 O Segment output1 (hi-voltage proof output).

32 SEG1 O Segment output2 (hi-voltage proof output).

33 SEG2 O Segment output3 (hi-voltage proof output).

34 SEG3 O Segment output4 (hi-voltage proof output).

35 SEG4 O Segment output5 (hi-voltage proof output).

36 SEG5 O Segment output6 (hi-voltage proof output).

37 SEG6 O Segment output7 (hi-voltage proof output).

38 SEG7 O Segment output8 (hi-voltage proof output).

39 P10 O Segment output9 (hi-voltage proof output).

40 P11 O Segment output10 (hi-voltage proof output).

41 P12 O Segment output11 (hi-voltage proof output).

42 P13 O Segment output12 (hi-voltage proof output).

43 P23 O Segment output13 (hi-voltage proof output).

44 P22 O Segment output14 (hi-voltage proof output).

mbol I/O Function

S



No connection.



No connection.

DD

I Power supply terminal, VDD: +5V r0.5V.

12

11

16

DN-780R

BA6109U1 (IC101, 102)

FRONT VIEW

1 10

HA12170NT (IC103, 403)

REC IN

Vcc

PB IN

REF

C/B/OFF

IA OUT

NR IN

VREF

PB OUT

SS1

SS2

CCR

HLS DET

LLS DET

REC OUT

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

REC IN

GND

PB IN

BIAS

M/R/P

IA OUT

NR IN

VREF

PB OUT

SS1

SS2

CCR

HLS DET

LLS DET

REC OUT

GND

V OUT 1

VZ 1

VR

F IN

R IN

VCC 1

VCC 2

VZ2

V OUT 2

1

2

3

4

5

6

7

8

9

10

BA10393F (IC103, 104) BA15218F (IC104, 105, 107, 109, 110, 404, 405, 407, 409, 410, 701, 707~709, 807~810) M5220FP (IC101, 401, 801, 805)

V

2

8

B OUTPUT

7

6

B –INPUT

B +INPUT

5

A OUTPUT

A –INPUT

A+INPUT

V

1

2

3

4

TC4053BF (IC102, 106, 108, 402, 406, 408, 702~706, 804)

IY

OY

Z-COM

OZ

INH

V

1 2

3

IZ

4 5 6

7

EE

8

SS

16 15

14

13

12

11

10

9

DD

V

Y-COM

X-COM IX

OX A

B C

X24C00S (IC106) EEPROM

NC

Vss

1

2

3

4

8

7

6

5

Vcc

NC

CLK

DATA

MAX202CSE (IC107)

C1+

1 2

V+

3

C1-

C2+

4

C2-

5

V-

6

R2IN

7

8

T2OUT

16 15

14

13

12

11

10

9

Vcc

GND

T1OUT R1IN

R1OUT T1IN

T2IN R2OUT

m

PC1297CA (IC111, 411)

VST

VR1

VIN (R) 1

PH1

CIN1

COUT1

VOUT11

VOUT12

GND

STABI-

1

LIZER

2

ABSO

3

DET

PEAK

4

DET

5

6

7

VCA

8

9

PRE DRIVER

PRO-

TECTER

ABSO

DET

PEAK

DET

VCA

18

17

16

15

14

13

12

11

10

Vcc

VR2

CIN (R) 2

PH2

CIN2

COUT2

VOUT21

VOUT22

VIN (0)

NJM7805FA(S) (IC903) NJM7808FA(S) (IC901)

FRONT

VIEW

Input

GND

Output

NJM7908FA (IC902)

FRONT

VIEW

Input

GND

Output

17

TRANSISTORS

l

DTA114EK DTA144EK DTC114EK DTC144EK

PNP

NPN

DN-780R

B

TOP

C

VIEW

E

DTA Series

C

DTC Series

C

DTA144ES DTC114ES DTC124XS DTC143ES

2SA933 2SB562(C) 2SC5395(E/F) 2SD2144 2SD468(C)

PNP

NPN

FRONT

VIEW

C

E

FRONT

VIEW

E

B

R1

B

R2

E

C

B

DTA114EK DTA144EK DTA144ES

R1 10kohm /

47kohm / 47kohm /W47kohm /

W

R2 10kohm /

47kohm /

W

DTC114EK

DTC114ES

DTC124XS

DTC143ES

DTC144EK

2SK373(Y)

R1

B

R2

R1

10kohm /

W

10kohm /W10kohm /

22kohm /W 47kohm /W

4.7kohm /W4.7kohm /

47kohm /W47kohm /

2SC2412K(S)

E

R2

10kohm /

W

KTC2875B

B

FRONT

VIEW

G

S

D

TOP

C

VIEW

E

DIODES/LED

l

HZS4C HZS5C HZS12B HZS6C HZS22C HZS7B MTZJ9.1A

OTHERS

l

GP1U271X (Remote Control Sensor) (IC551)

TOP VIEW

CC

OUT

V

GND

V

Head Amp

Limiter Amp

1SS355 1SR35-400A

Detector &

BPF Integrator

Comparator

Hysteresis Comparator

GND

VCCV

OUT

18

FL DISPLAY BJ881GHK (FL301)

PIN CONNECTION

3

2

PIN NO.

CONNECTION

1) F1,F2 ---------- Filament

NOTE

2) NP ------------- No pin

3) NX ------------- No extend pin

4) DL ------------ Datum line

5) 1G~8G ------- Grid

9

8

F

2

(NC pin should be electorically open on the PC board)

7

6

5

4

3

2

1

0

P

N

1

P

6

P

1

5

4

3

2

1

2

9

8

7

6

5

P

9

8

7

6

5

DN-780R

COLOR ILLUMINATION Reddish Orange ----- Above pattern part

Green ------------------ Other

139

2

1

4

3

2

1

0

9

8

7

6

5

4

3

2

1

0

9

8

7

6

P

N

P

1

4

P

4

2

3

2

1

G

3

4

5

6

7

G

5

4

3

2

1

8

N

F

G

P

1

GRID ASSIGNMENT

1a 1a1a2a 1a 1a1a2a

3G

B1

B7

2G 1G

4G

Dp2 Dp1

ANODE CONNECTION

7G 6G 5G 4G 3G 2G 1G 8G

8G

P1

1a 1a 1a 1a 1a 1a B1 B1

7G

f

e

5G 6G 8G

B6

[2G,1G]

B12

7G 6G 5G 4G 3G 2G 1G

P9

2a 2a B7 B7

b

g

c

d

1b 1b 1b 1b 1b 1b B2 B2

P2

1f 1f 1f 1f 1f 1f B3 B3

P3

1g 1g 1g 1g 1g 1g B4 B4

P4

1c 1c 1c 1c 1c 1c B5 B5

P5

1e 1e 1e 1e 1e 1e

P6

1d 1d 1d 1d 1d 1d

P7

P8

Dp1 Dp2 S1 S1

B6 B6

P10

P11

P12

P13

P14

P15

P16

2b 2b B8 B8

2f 2f B9 B9

2g 2g B10 B10

2c 2c B11 B11

2e 2e

2d 2d

B12 B12

19

PRINTED WIRING BOARD

DN-780R

1

CONTROL POWER UNIT Ass'y

2

1

3

10

4

1

5

17

2

1

5

1 6

1 14

16

17

1

7

1

6

10

76

1 9

8

A

B

112

12 112 112

1

16

5

1

15

9

C

12

1

D

12

1

224

12

17

E

25

2 16

1

COMPONENT SIDE

20

DN-780R

1

CONTROL POWER UNIT Ass'y

2

3

14

8

5

4

5

14

8

75

76

100

1

25

51

50

26

16

9

8

1

8

5

4

1

76

8

A

B

1

4

5 8

1

4

5 8

C

16

9

11

12

22

23

1

44

33

34

8

5

4

1

8

1

D

8

5

4

1

8

5

4

1

4

8

5

E

FOIL SIDE

21

DN-780R

1

AUDIO UNIT Ass'y

2

3

4

115

5

76

8

A

B

1

12112

1 3

18

1

10

9

18

1

10

9

1 3

112

13

15

16

112

1

30

112

13

1

15

16

1

30

112

C

25

2 24

1

D

112

13

12

1

12

1

1 15

1

12

1

E

COMPONENT SIDE

22

DN-780R

1

AUDIO UNIT Ass'y

2

8

9

3

8

1

8

1

9

16

1

16

4

8

5

4

8

1

9

16

1

9

16

8

1

9

16

8

1

9

16

5

8

5

1

4

5

8

1

4

8

1

4

5

8

1

4

8

1

76

5

8

1

4

5

4

8

A

B

16

9

8

1

16

9

8

1

5

8

5

8

1

4

16

9

1

4

5

8

1

4

5

8

1

4

16

9

4

1

8

5

8

1

8

5

4

1

8

5

8

1

4

1

8

5

C

D

FOIL SIDE

E

23

DN-780R

1

GU-3463 XLR UNIT Ass'y (ACD-780:Option)

1 15

5

8

4

1

2

3

4

5

76

8

A

5

8

4

1

5

8

4

1

5

8

4

1

5

8

4

1

5

8

4

1

B

1 8

916

COMPONENT SIDE

C

1 8

D

916

FOIL SIDE

24

E