Kenwood KRC-Z965, KRC-X838 Service Manual

CASSETTE RECEIVER

KRC-Z965,X838

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SERVICE MANUAL

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This service manual does not include information on the cassette mechanism operation description.

For such information, please refer to the cassette mechanism assembly service manual (D40-1122-05: B51-7452-00).

KRC-Z965

TEL [phone] QQ 376315150 892498299

X838

Front glass
(B10-4216-01)

Front glass
(B10-4215-01)

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© 2002-2 PRINTED IN JAPAN

B51-7926-00 (S) 2142

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Panel assy
(A64-2653-11)

Panel assy
(A64-2652-11)

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TEL

13942296513

Plastic
cabinet assy
(A02-2712-13)

Escutcheon
(B07-3050-02)

DC cord
(E30-6063-05)

Mounting
hardware assy
(J21-9823-03)

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Lever
(D10-4674-04)x2

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Screw set
(N99-1656-05)

Remote controller assy
(A70-2026-05)

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Screw set
(N99-1723-05)
:KRC-Z965

Antenna adaptor
(T90-0523/0534/0552-05)

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SDA
SCL

S-METER

SW5V

RDCK

FM

AM

SW5V

AUDIO OUT

BACK UP

DATA H
DATA C

MUTE

CH

SDA

RDDA

BU5V

BU5V

DSI

EJECT G

EJECT R/G

(E) TYPE

TAPE

FM
AM

1512mV

866mV

3795mV

BU5V

PRE MUTE

PMUTE

PSTBY

MUTE

BEEP

AUX SW

TAPE/AUX

E-VOL OUT LEVEL

A8V

IFC OUT

SW5V

A8V

SCL

QUAL

AFS

SUB M+

SUB M-

MOT +B

FWD/REV Lch

FWD/REV Rch Rch

Lch

A8V

A8V

A8V

REQ H
RST

REQ C

CH CON

CLK

A8V

A8V

+B

-B

BACK UP

BU5VBU5V

MC REQ

SC CON

FL+B

RED

SI2

SI1

CLK

GREEN

KS1-KS4

KR1-KR5

F01-F06

WAVE

P5V

MC CLK

SC REQ

P RST

MC DATA

GCP

LAT

P5V

REMO

FL+B

FAC

BK

P5V

A8V

+B

-B

MOT+B

FAC

FL+B

MI-COM

MI-COM

SW5V

MI-COM

BU5V

P5V

MI-COM

REMO

O-DATA

O-CE

O-CLK

1.8V PRE

476mV

676mV

1695mV

(M) TYPE

4.5V PRE

AUX

CHANGER

QUAL

E'S OUT LEVEL PRE OUT LEVEL

MS OUT
DOLBY ON/OFF

MTL ON/OFF

MUTE
FWD/REV

MS MODE

F REEL

R REEL

MODE2

MODE1

MODE3

774mV 1377mV

(M) TYPE (E) TYPE

CHANGER

FM
AM

AUX

TAPE

1695mV

476mV

676mV

774mV

4.5V PRE

3795mV

866mV

1512mV

1733mV

1.8V PRE

(M) TYPE (E) TYPE

AM

FM

CHANGER

AUX

TAPE

3717mV

848mV

1481mV

1698mV

1.8V PRE

4469mV

1254mV

1781mV

2041mV

4.5V PRE

SUB M+

SUB M-

251mV

215mV

1200mV

AUX : 1200mV

TAPE : 388mV

CH

F/E

FM+B

PLL+B

AM+B

BUFF

E-VOL

MI-COM

DECODER

RDS

ISO
AMP

OEM

EJECT LED

DSI

DISP

4.5V PRE
DC/DC

2WAY MUTE

ACC DET

DIMMER

TEL-MUTE

ACC

DIMMER

POWER IC

PRE AMP

PRE OUT

SP OUT

MUTE

DRIVER

NOISE
BUFFER

P-CON

P-CON

IF+B

CASSETTE
MECHA

EQ
DOLBY

AUX

SW
OP AMP

E'S

SPEANA
AGC OP AMP

MUTE

4.5V

BU DET

BACK UP

EX AMP CONT

EX AMP CONT

NAVI MUTE

RESET

DET

PANEL

KEY ILL

MATRIX

KEY

FL

SW

MI-COM

PANEL

SPEANA
BPF

REMO

RESET

REG

SW

BUFFER

3.3V

SW

VOLTAGE
LIMITER

DRIVER

MAIN MOTOR

BOX

DC/DC

A8V

SW14V

DC/DC
REG

BU5V

SW5V

PANEL5V

Q43,44
Q45,46

Q52

IC14

IC1

IC2

Q36 IC8,Q34

IC5

Q37-42

IC10-12

IC4

Q32,35

IC7

Q15

Q31

Q30

Q14

Q26-29

Q3

Q51

IC3,Q4-6

IC6,Q16-23

Q602,603

Q24,605

A1 Q10-13

Q7,8

Q2,476

IC16101

IC1

IC5

IC2

ED1Q1,2

Q7-10

IC3

IC4

IC20

IC21

EEP ROM

IC25

Q47,48,

(E) TYPE ONLY

(M) TYPE ONLY

(M) TYPE ONLY

ANT -CON

SUB MOTOR
DRIVER

Q5

(M) TYPE ONLY

(E) TYPE ONLY

EXCEPT (M) TYPE

(E) TYPE ONLY

(E) TYPE ONLY

KRC-Z965,X838

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TEL [phone] QQ 376315150 892498299

TEL

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BLOCK DIAGRAM

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KRC-Z965,X838

COMPONENT DESCRIPTION

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● SWITCH UNIT (X16-1682-71)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

TEL [phone] QQ 376315150 892498299

● ELECTRIC UNIT (X25-923X-XX)

Ref.No. Component Name Application/Function Operation/Condition/Compatibility

TEL

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IC1 TAR5S33 FL AVR +3.3V Output
IC2 TC74HC4050AFT Buffer For FL control lines, 5V → 3.3V logic level shifting
IC3 RS-171 Remote sensor IC
IC4 BA3830F BPF IC BPF for the spectrum analyser indicator
IC5 UPD703032GFA04 Panel MI-COM.

Q1
Q2

Q3
Q4

Q6
Q7 2SC4081 V-I converter Current driver for green LEDs
Q8 2SC4081 V-I converter Current driver for red LEDs
Q9

Q10

IC1 UPD703033GFA19 System MI-COM.
IC2 TDA7407 E-VOL.& N.C. MPX
IC3 M5237ML AVR IC
IC4 TDA7560 Power IC

IC5 TDA7401
IC6 ICL7660SIBA DC/DC converter -9V AVR for pre-output amplifier

IC7 TC74HC02AF Mute logic 2-input NOR x 4

IC8 NJM4565M-TE2 Op. amp.
IC10 NJM4565M-TE2 Op. amp. Amplifier for the front pre-outputs
IC11 NJM4565M-TE2 Op. amp. Amplifier for the non-fader pre-outputs
IC12 NJM4565M-TE2 Op. amp. Amplifier for the rear pre-outputs
IC14 TDA7479D RDS decoder
IC16 S-80837ANNP Reset IC When BU 5V voltage is less than 3.7V, IC outputs Lo.
IC20 BA3121F Isolation amplifier AUX inputs isolation amplifier
IC21 BA3129F Switched op.amp. Input switching with AUX inputs and TAPE inputs
IC22 CXA2560Q Dolby IC PB EQ and Dolby IC
IC25 BR24C02F-W EEPROM
IC26 BA6219BFP-Y Sub motor driver Motor driver for the sub motor of cassette mechanism

Q2 2SC4081

Q476 2SB1548(P) Q2 and Q476 are inverted Darlington connection.

Q3 2SA1037K SW 5V

Q4 2SA2057 A.+8V AVR

Q5

Q6

Q7

Q8

Q10 2SA2057
Q11 2SC4081
Q12
Q13
Q14
Q15
Q16 2SB1443
Q17 2SC4081

DTA144EUA or UN5113
DTC114YUA or UN5214

DTA114EUA or UN5111
DTC114EUA or UN5211

DTC114YK or UN2214

DTA114EUA or UN5111
DTA114EUA or UN5111

13942296513

DTC144EUA or UN5213
DTA124EUA or UN5112
DTA124EUA or UN5112
DTC144EUA or UN5213

DTC124EUA or UN5212
DTA124EUA or UN5112
DTA123JK or KRA105S
DTC144EUA or UN5213

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FL & Illumination AVR ON/OFF control. When Q2's base goes Hi, Q1
is turned on, and FL+B(45V) line is supplied to the FL indicator and
the key illumination circuit.
When a base goes Lo, Q3 is turned on, and PAN5V line is supplied to
IC3 and IC4.

When a base goes Hi, Q6 is turned on, and SRC illumination is lit.

When a base goes Lo, Q9 is turned on, and key illumination Red is lit.
When a base goes Lo, Q10 is turned on, and key illumination Green is lit.

IC is combined with Q4, and it works as the error detection, the Q4's driver.

HPF (Front/Rear output), LPF, Non-Fader switching and volume function

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Amplifier for the spectrum analyser and generation of Vref.(1/2Vcc) voltage

While BACKUP is applied, AVR outputs +5V.

While a base goes Lo, SW 5V is supplied to the microprocessor
peripheral circuits.
Q4 is combined with IC3, and it works as the power supply of +8.0V output.

When Q8's base goes Hi, Q7 is turned on, and A.+8V AVR, Voltage
limiter and A.+10V AVR are working.

When Q12's base goes Hi, Q13 is turned on, and FL/Illumination AVR
is working.
When a base goes Lo, Q14 is turned on, and control pulse signal is outputted.
When vehicle small lamps turn on, Q15's base goes Hi, and it is turned on.

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FL+B SW

REMO SW
FL blanking SW When a base goes Hi, Q4 is turned on, and FL indicator is lit.

SRC key illumination SW

Key illumination Red SW
Key illumination Green SW

High pass filter & Non-Fader
volume

BU 5V AVR

A.+8V AVR SW When Q5's base goes Hi, Q6 is turned on, and A.+8V AVR is working.

SW14V

FL/Illumination AVR When Q11's base goes Hi, AVR outputs +9V.

FL/Illumination AVR SW
EXT. AMP CON. SW

Dimmer detection SW
A.+10V AVR When Q17's base becomes Hi, AVR outputs +10V.

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KRC-Z965,X838

COMPONENT DESCRIPTION

7

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Ref.No. Component Name Application/Function Operation/Condition/Compatibility

Q18 2SA1576A
Q19 2SC4081 PRE-AMP -9V AVR
Q20 2SA1576A
Q21 2SC4081
Q22 2SC4081 PRE-AMP +9V AVR
Q23 2SA1576A
Q24 2SB1443

Q605

Q26 2SB1277(Q,R)
Q29

TEL [phone] QQ 376315150 892498299

Q27 2SA1576A P-CON. protection SW Protect Q26 by turning ON when P-CON output is grounded.
Q28

Q30 2SC4081 BU detection SW When momentary power down has detected, a base goes Lo, and

Q31 2SC4081 ACC detection SW While ACC is applied, a base goes Hi, and Q31 is turned on.
Q32
Q34 2SC4081
Q35
Q36

Q37
Q38
Q39
Q40
Q41

TEL

Q42
Q43
Q44 CPH3105 the F/E. Works during FM reception mode or RDS reception mode.
Q45
Q46 CPH3105 the F/E. Works during AM reception mode.
Q47
Q48

Q51 2SB1427 PAN5V SW
Q52

Q101
Q103
Q602 2SB1443

Q603 2SC4081 to the sub motor driver.

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DTC114YUA or UN5214

DTC124EUA or UN5212

DTA124EUA or UN5112

DTA124EUA or UN5112

DTC124EUA or UN5212
DTC143TUA or UN5216

DTC143TUA or UN5216
DTC143TUA or UN5216
DTC143TUA or UN5216
DTC143TUA or UN5216
DTC143TUA or UN5216

13942296513

DTC143TUA or UN5216
DTC124EUA or UN5212

DTC124EUA or UN5212

DTA114YUA or UN5114
DTA114YUA or UN5114

DTC143TUA or UN5216
DTA114YUA or UN5114

DTC124EUA or UN5212

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Main motor SW

P-CON SW

P-CON. protection inhibit SW

Mute driver
AGC for spectrum analyser
E. VOL. mute SW
Noise buffer

Audio mute SW (Front R)
Audio mute SW (Front L)
Audio mute SW (Non Fader L)
Audio mute SW (Non Fader R)
Audio mute SW (Rear R)
Audio mute SW (Rear L)

FM+B SW

AM+B SW
Eject green LED SW When a base goes Lo, Q47 is turned on, and Eject green LED is lit.

Eject red LED SW When a base goes Lo, Q48 is turned on, and Eject red LED is lit.

Composite signal buffer
DSI LED SW

AUX/TAPE selector SW

Voltage limiter

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Q18 and Q20 work as a differential amplifier, Q19 works as a driver,
and -9.3V is supplied to OP AMP.

Q21and Q22 work as a differential amplifier, Q23 works as a driver,
and +9.7V is supplied to OP AMP.

When Q605's base goes Hi, Q24 is turned on, and BU line is supplied
to the main motor.
When Q29's base goes Hi, Q26 is turned on, and P-CON signal is outputted.
Works during POWER ON mode.

Prevents Q27 tuning ON during start-up after power ON.
While BACKUP is applied, a base goes Hi, and Q30 is turned on.

Q30 is turned off.

When BU detection SW or System RESET or MI-COM.'s MUTE is
working, a base goes Lo, and Q32 is turned on.

When BU detection SW or MI-COM.'s mute is working, a base goes
Hi, and Q35 is turned on.

When Q37's base goes Hi, Pre-output is muting.
When Q38's base goes Hi, Pre-output is muting.
When Q39's base goes Hi, Pre-output is muting.
When Q40's base goes Hi, Pre-output is muting.
When Q41's base goes Hi, Pre-output is muting.

Q

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When Q42's base goes Hi, Pre-output is muting.
When Q43's base goes Hi, Q44 is turned on, and A.+8V is supplied to

When Q45's base goes Hi, Q46 is turned on, and A.+8V is supplied to

For PAN5V on/off switching. When a base goes Lo with panel attached
to the set, Q51 is turned on, and PAN5V is supplied to the panel.

When a base goes Lo, Q101 is turned on, and DSI illumination LED is lit.
When a base goes Hi, AUX inputs are selected.
When a base goes Lo, TAPE inputs are selected.
When Q603's base goes Hi, Q604 is turned on, and BU line is supplied

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KRC-Z965,X838

MICROCOMPUTER'S TERMINAL DESCRIPTION

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● IC5 (SWITCH UNIT : X16-1682-71)

TEL [phone] QQ 376315150 892498299

17-19 NC O Not used(N.C.)

22-33 NC O Not used(N.C.)

TEL

42-47 NC O Not used(N.C.)

50-55 NC O Not used(N.C.)

60-71 NC O Not used(N.C.)

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Pin No.

Pin Name I/O Description Processing Operation

1 SC DATA I/O Data input/output with the system MI-COM.

2 MC CLK I Clock input from the system MI-COM.

3 NC O Not used(N.C.)

4 DATA 1 O Data output 1 to the FL driver IC

5 CLK O Clock output to the FL driver IC (Data shift by the rise edge of the pulse)

6 NC O Not used(N.C.)

7 DATA 2 O Data output 2 to the FL driver IC

8 CLK IN I Clock input from the FL driver IC (Data shift by the rise edge of the pulse)

9 EVDD - Positive power supply connection terminal Connected to P5V lines.
10 EVSS - Ground connection terminal Connected to GND lines.

11 RED LED O

12

GREEN LED

13 REMO I Data input from the remote control light sensor
14 LATCH O Latch output to the FL driver IC Lo: Latch, Hi: Through
15 GCP O Control pulse output to the FL brightness

16 REMO ON I/O

20 BLK O Display ON/OFF control output Lo: Display OFF, Hi: Display ON
21 TEST I Test terminal Not used(Connected to GND lines)

34 RESET I Reset terminal Lo: Reset, Hi: Reset release
35 XT1 - Sub clock resonator connection terminal Not used(Pull down to GND lines)
36 XT2 - Sub clock resonator connection terminal Not used(N.C.)

37 REGC ­38 X2 - Main clock resonator connection terminal

39 X1 - Main clock resonator connection terminal
40 VSS - Ground connection terminal Connected to GND lines.
41 VDD - Positive power supply connection terminal Connected to P5V lines.

48 FL +3.3V O FL VDD ON/OFF output Lo: OFF, Hi: ON
49 FL+B I/O FL+B ON/OFF output Hi-Z: OFF, Hi: ON

56 BLUE LED I/O Source key LED ON/OFF output Hi-Z: OFF, Hi: ON
57 NC O Not used(N.C.)
58 BVDD - Positive power supply connection terminal Connected to P5V lines.
59 BVSS - Ground connection terminal Connected to GND lines.

72 SA RESET O Reset output to the BPF IC Hi: Reset
73 NC O Not used(N.C.)
74 AVDD ­75 AVSS - A/D converter ground connection terminal Connected to GND lines.
76 AVREF - A/D converter reference voltage input terminal
77 F01 I BPF(63Hz) input
78 F02 I BPF(150Hz) input
79 F03 I BPF(330Hz) input
80 F04 I BPF(1kHz) input
81 F05 I BPF(3.3kHz) input
82 F06 I BPF(10kHz) input
83 WAVE IN I Audio input
84 KR5 I Key return 5 input
85 KR4 I Key return 4 input
86 KR3 I Key return 3 input
87 KR2 I Key return 2 input

13942296513

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Illumination red ON/OFF output in case of two colours
/Illumination ON/OFF output in case of one colour
Illumination green ON/OFF output in case of two colours
/Not used in case of one colour

Power supply ON/OFF output to the remote control
light sensor IC and BPF IC

Capacitor connection terminal for regulator inside
microprocessor

A/D converter positive power supply connection terminal

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Lo: ON, Hi: OFF
Lo: ON, Hi: OFF in case of two colours

/Not used(N.C.) in case of one colour

Lo: ON, Hi-z: OFF

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Connected to P5V lines.

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KRC-Z965,X838

MICROCOMPUTER'S TERMINAL DESCRIPTION

7

Q

Q

Pin No.

88 KR1 I Key return 1 input
89 SC REQ O
90 NC O Not used(N.C.)
91 SC CON I Control input from the system MI-COM. Hi: Operation mode
92 NC O Not used(N.C.)
93 SOURCE I Source key input Lo: Key OFF, Hi: Key ON
94 VREF CON O A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal
95 MC REQ I
96 KS4 I/O Key scan output 4
97 KS3 I/O Key scan output 3

TEL [phone] QQ 376315150 892498299

98 KS2 I/O Key scan output 2
99 KS1 I/O Key scan output 1

100 MC DATA I Data input from the system MI-COM.

● IC1 (ELECTRIC UNIT : X25-923X-XX)

Pin No.

1 MC DATA I/O Data input/output with the panel MI-COM.
2 MC CLK O Clock output to the panel MI-COM.

3 DSI GUIDE I/O DSI control output

4

TEL

5

6
7 IC2 SDA I/O Data input/output with IC2, IC5, and IC25

8 IC2 SCL I/O Clock input/output with IC2, IC5, and IC25

9 EVDD - Positive power supply connection terminal Connected to BU 5V lines.
10 EVSS - Ground connection terminal Connected to GND lines.
11 PAN RESET O Reset output to the panel MI-COM. Lo: Reset or Momentary power down detected
12 BEEP O BEEP output
13 REMO I Data input from the wired remote control
14 SVR O SVR output Not used(N.C.)
15 DIMMER I Small lights detection input Lo: During vehicle small lamps turn on.
16 PLL DATA I/O Data input/output with F/E
17 PLL CLK I/O Clock input/output with F/E
18 P STBY O POWER IC STBY output

19 P CON I/O P-CON output
20 ANT CON O ANT-CON output Not used(N.C.)

21 TEST - Test terminal Not used(Connected to GND lines)
22 P MUTE O POWER IC mute output
23 PAN5V I/O Panel 5V control output

24

25 DOLBY O DOLBY ON/OFF switching output Lo: Dolby NR OFF, Hi: Dolby NR ON
26 MUSIC I Music blank detection input

27 BU DET I Momentary power down detection input

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28 ACC DET I ACC detection terminal Lo: ACC ON, Hi: ACC OFF
29 SW5V I/O SW5V control terminal Lo: SW5V ON, Hi-Z: SW5V OFF

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Pin Name I/O Description Processing Operation

Pin Name I /O Description Processing Operation

EJECT KEY G

13942296513

EJECT KEY R

MC REQ/FLIP

EXT AMP CONT

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Communication request output to the system MI-COM.

Communication request input from the system MI-COM.

O Eject key illumination green control output

O Eject key illumination red control output

Communication request output to the panel MI-COM.

I/O

/Flip detection input /Lo: Panel detached, Hi: Panel attached

O External amp. control output (in 200msec) Bass boost LOW__Hi: 130msec, Lo: 70msec

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Lo: Standby, Hi: Request

Hi: Request

Lo: DSI ON, Hi-Z: DSI OFF
Lights on at the panel tilted during POWER ON mode.
Flashing at the panel detached during POWER
ON mode.
Lo: ON, Hi: OFF
Lights on at the panel tilted during POWER ON
mode in case of the key illumination green.
Lo: ON, Hi: OFF

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Lights on at the panel tilted during POWER ON
mode in case of the key illumination red.
Hi: Request

Lo: Power IC OFF, Hi: Power IC ON or ALL OFF mode
Hi-Z: POWER OFF mode or ALL OFF mode, Hi:
POWER ON mode

Lo: Muting (during POWER OFF, ALL OFF, TEL MUTE)
Lo: Panel attached normally, Hi-Z: Panel detached or tilted
Bass boost OFF__Hi: 160msec, Lo: 40msec

Bass boost HI__ Hi: 100msec, Lo: 100msec

Lo: Music signal detected, Hi: Music signal not detected
Lo: BU ON, Hi: When momentary power down
detected or BU OFF

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KRC-Z965,X838

MICROCOMPUTER'S TERMINAL DESCRIPTION

7

Q

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Pin No.

TEL [phone] QQ 376315150 892498299

TEL

62,63 NC O Not used(N.C.)

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82-85 NC I Not used(Pull down to GND lines)

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Pin Name I/O Description Processing Operation

30 MUTE I/O MUTE output Lo: Muting OFF, Hi-Z: Muting ON
31 O CE I/O External display CE terminal
32 O CLK I/O External display clock terminal
33 O DATA I/O External display data terminal
34 RESET I Reset input Lo: System reset , Hi: Normal operation
35 XT1 I Sub clock resonator connection terminal Clock count during POWER OFF mode
36 XT2 - Sub clock resonator connection terminal

37 REGC -

38 X2 - Main clock resonator connection terminal
39 X1 I Main clock resonator connection terminal

40 VSS - Ground connection terminal Connected to GND lines.
41 VDD - Positive power supply connection terminal Connected to BU 5V lines.
42 CLKOUT O Internal system clock output Not used(N.C.)
43 SUB O Sub motor control output
44 SUB+ O Sub motor control output

45 PRE MUTE O Pre-out muting control output
46 NC O Not used(N.C.)

47 MOTOR I/O Cassette mechanism main motor control output Hi-Z: Motor stopped, Hi: Motor running
48 MTL O Normal/METAL switching control output Lo: METAL, Hi: Normal

49 EQ MUTE O EQ muting switching output

50 AFS O Noise detection time constant switching terminal
51 AM+B I/O AM+B control output Hi: During AM reception

52 FM+B I/O FM+B control output Hi: During FM reception, Hi: Last FM reception
53 R QUAL I Quality input from the RDS decoder IC
54 R DATA I Data input from RDS decoder IC
55 IC2TYPE0 I IC2 setting terminal 0 Lo: Initial value(Default)
56 IC2TYPE1 I IC2 setting terminal 1 Lo: Initial value(Default)
57 P ON I/O SW14V control output Hi-Z: POWER OFF mode, Hi: POWER ON mode
58 BVDD - Positive power supply connection terminal Connected to BU 5V lines.
59 BVSS - Ground connection terminal Connected to GND lines.
60 TYPE I Destination type setting terminal Lo: E type, Hi: M type
61 E2PDET I EEPROM detection input Lo: No EEPROM, Hi: With EEPROM

64 AUX SW O TAPE/AUX input switching output Lo: Except AUX input, Hi: AUX input
65 ILL ON I/O FL/Illumination AVR ON/OFF control output Hi-Z: AVR OFF, Hi: AVR ON
66 F/R O TAPE EQ input switching output Lo: Tape FWD input, Hi: Tape REV input

67 MSC O Music blank detection constant switching output
68 MODE1 I Cassette mechanism mode detection input 1

69 MODE2 I Cassette mechanism mode detection input 2
70 CH CON O Changer control output Lo: Standby mode, Hi: Operation mode
71 CH RST O Reset output to changers : Reset
72 CH REQH O Communication request output to changers Lo: Request
73 AVCONT O A/D converter reference voltage control output Hi: Active, Connected to AVREF terminal
74 AVDD ­75 AVSS - A/D converter ground connection terminal Connected to GND lines.
76 AVREF I A/D converter reference voltage input terminal
77 IFC OUT I Input terminal from F/E IFC OUT Hi: Station detected (Vth=2.5V)
78 S METER I S-meter input from F/E
79 NOISE I FM noise detection input
80 F REEL I
81 R REEL I

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Capacitor connection terminal for regulator inside
microprocessor

A/D converter positive power supply connection terminal

FWD reel pulse input from the cassette mechanism
REV reel pulse input from the cassette mechanism

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Oscillation: POWER ON mode, Oscillation stop: POWER
OFF mode or momentary power down detected

Lo: Momentary power down detected, Hi: Fix in
the case of 2 zone mode

Lo: Tape play mode, Hi: Tape FF/REW, Hi: Except
Tape mode
Lo: During FM seek or AF search, Hi: During FM
reception, Hi: Last FM with RDS model

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Except RDS model: Not used(Pull down to GND lines)
Except RDS model: Not used(Pull down to GND lines)

Lo: Tape FF/REW mode, Hi: Tape PLAY mode,
Lo: Except Tape mode

Connected to BU 5V lines.

Hi: Reel pulse detected (Vth 2.5V)

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Hi: Reel pulse detected (Vth 2.5V)

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KRC-Z965,X838

MICROCOMPUTER'S TERMINAL DESCRIPTION

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86 PANEL DET I Panel detection input Lo: Panel attached, Hi: Panel detached
87 CH MUTE I Mute request from changers Hi: Mute request
88 PHONE I PHONE detection input
89 SC CON O Panel MI-COM. control output Hi: Operation mode
90 NC O Not used (N.C.)
91 MODE3 I Cassette mechanism mode detection input 3
92 NC O Not used (N.C.)
93 R CLK I Clock input from RDS decoder IC
94 CH REQC I Communication request input from changers Lo: Request
95 EJECT I EJECT key detection input Lo: When EJECT key is pressed

TEL [phone] QQ 376315150 892498299

96 SC REQ I
97 CH DATAC I Data input from changers
98 CH DATAH O Data output to changers
99 CH CLK I/O Clock input/output with changers

100 SC DATA I Data input from the panel MI-COM.

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Pin Name I/O Description Processing Operation

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Communication request input from the panel MI-COM.

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1V or less: TEL MUTE, 2.5V or greater: NAVI MUTE

Except RDS model: Not used (Pull down to GND lines)

Hi: Request

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TEL

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TEST MODE

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1. How to enter the test mode

2. How to exit from the test mode

3. Initial status in the test mode

TEL [phone] QQ 376315150 892498299

4. Special display in Tuner mode

TEL

5. Forced switching of K3I

6. Audio-related specifications

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While pressing and holding the Preset 1 and Preset 3 keys,
reset the unit.

Reset the unit, ACC OFF, power OFF and Panel detached.
(Note) The test mode cannot be terminated by momentary

power down.

• Sources : ALL OFF

• Display : All segments are lit.

• Volume : –10 dB (displayed as "30")

• Loudness : OFF

• CRSC : OFF regardless of the presence of

• SYSTEM Q : Flat

• BEEP :

When any of the following messages is displayed in Tuner
mode, the F/E may be abnormal.

• "TNE2P NG": The EEPROM is set to the default (unstable

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values) because the F/E was shipped without passing
through the adjustment process, etc.

• "TNCON NG": Communication with the F/E is not
possible.

Each press of the Preset 6 key in Tuner mode should switch
K3I from AUTO → Forced Wide → Forced Middle → Forced
Narrow → AUTO.
The initial status is AUTO and the display shows these
modes as follows.

• AUTO : FMA

• Forced Wide : FMW

• Forced Middle : FMM

• Forced Narrow : FMN

• A short press of the Q key initiates the audio adjustment
mode.

• Pressing the ∗ key on the remote initiates the audio
adjustment mode.

• Fader is selected to the initial item.

• Continuous holding of a remote control key is inhibited.

• Bass, Middle and Treble are adjusted in 3 steps of Min /
Center / Max with the Track Up/Down keys.

• Balance is adjusted in 3 steps of Left Max / Center / Right

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Max with the Track Up/Down keys.

• Fader is adjusted in 3 steps of Rear Max / Center / Front
Max with the Track Up/Down keys.

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switching function.

When pressing any keys, the buzzer
generates a beep at any time.

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• HPF is adjusted in 2 steps of Through / 220Hz with the

• LPF is adjusted in 2 steps of Through / 120Hz with the

• Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble

7. Menu-related specifications

• Pressing the DNPP/SBF key on the remote initiates the

• Continuous holding of a remote control key is inhibited.

• In the case of the cassette receiver model, A short press

8. Backup current measurement

When the unit is reset while ACC is OFF (i.e. by turning
Backup ON), the MUTE terminal goes OFF in 2 seconds in
place of 15 second. (The CD mechanism is not activated at
this time.)

9. Special display when the display is all on

Pressing the Preset keys while the power is ALL OFF
displays the following information.

PRESET 1

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PRESET 3

PRESET 4

PRESET 5

PRESET 6

10. Method of the span switching (K and M type only)

While pressing and holding the Preset 1 and Preset 5 keys,
reset the unit.

11. Other specifications

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• No displays such as " CODE OFF " during Power ON.

• Pressing the TI (AUTO) key during changer operation

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Track Up/Down keys.

Track Up/Down keys.

f are not dealt with by the audio adjust.

Menu mode.

of the TI key initiates the Menu mode.

Version display (8 digits, Month/Day/Hour/Minute)

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(Display) SYS xxxxxxxx : System microcomputer

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Sireal number display (8 digits)
(Display) SNo xxxxxxxx
Short press : View power ON time.
(The All OFF period is not counted.)
Long press/hold : Clear power ON time at
the power ON time displaying.
(Display) PON xxxxx Max. 65535 (hours)
Short press : Display TAPE operation time.
Long press/hold : Clear TAPE operation time
at the TAPE operation time displaying.
(Display) TapTim xxxxx Max. 65535 (hours)
Short press : Display TAPE ejection count.
Long press/hold : Clear TAPE ejection count
at the TAPE ejection count displaying.
(Display) EjeCnt xxxxx Max. 65535 (times)
Short press : Display Panel open/close count.
Long press/hold : Clear Panel open/close
count at the Panel open/close count.
(Display) PnCnt xxxxxx Max. 655350 (times)

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PAN xxxxxxxx : Panel microcomputer

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