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53

AUDIO IC CLOCK

O

Serial data transfer clock signal output to audio signal IC, R2A15216FP

54

AD SUPPLY CUT OFF

O

Micom AD Vcc supply cut off

55

MTK POWER CONTROL

I

MTK IC Power control

56

FAN ON

O

Fan on/off control port.

57

NO USE

O

Unused port (Output port setting - open)

58

ST-TUNED

I

“TUNED” input signal from Tuner pack.

59

NO USE

O

Unused port (Output port setting - open)

60

ST-CE

O

PLL chip enable signal output to the tuner unit

61

ST-DOUT (UC_DIN)

O

PLL serial data output from the tuner unit

62

VCC

–

Power supply terminal (+3.3V)

63

ST-DIN (UC_DOUT)

I

PLL serial data input to the tuner unit

64

VSS

–

Ground terminal

65

ST-CLK

O

PLL serial data transfer clock signal output to the tuner unit

66

MTK 3.3V MONITOR

I

Micom monitoring the MTK power supply pin.

67

THERMA VACS

I

Temperature detection signal input from thermistor (A/D input)

68

STBY RELAY

O

Main power on/off control signal output  “H”:power on

69

OVER VOLTAGE DET

I

Over-voltage protection detection input terminal “L”: over-voltage detected

70

VACS-IN

I

Spectrum analyzer drive signal input from Audio IC signal (A/D input)

71

METER LEVEL IN

I

Audio signal level for Meter level detect (A/D input).

72

REC BIAS

O

Recording bias on/off control signal output  “H”:bias on

73

POWER KEY

I

POWER key and DISPLAY key press detection signal (Interrupt input)

74

NO USE

O

Unused port (Output port setting - open)

75

REC MUTE

O

Recording muting on/off control signal output  “L”:muting on

76

MIC DET

I

Mic in detect pin.

77

HP DET

I

Heahphone in detect pin.

78

CAPM-CNT

O

Capstan motor drive signal output

79

B-TRIG

O

Deck side trigger plunger drive signal output  “H”:plunger on

80

B SHUT

I

Shut off detection signal input from deck A side reel pulse detector (A/D input)

81

B-HALF/REC

I

Deck B cassette detection, forward side recording tab detection and reverse side recording 
tab detection signal input terminal  (A/D input) 

82

TC-RELAY

O

Recording/playback selection signal output  “H”:recording  “L”:playback

83

METER IN2

O

Meter motor control port

84

METER IN1

O

Meter motor control port

85

METER IN3

O

Meter motor control port

86

METER IN4

O

Meter motor control port

87

METER SW

I

Meter position switch (Initial & End Position) for calibration purpose.

88

AD-KEY-1

I

Key input terminal for AD key line 1.

89

AD-KEY-0

I

Key input terminal for AD key line 0.

90

AD-KEY-2

I

Key input terminal for AD key line 2.

91

MODEL-IN

I

Model setting terminal (A/D input)

92

DEST-IN

I

Destination setting terminal (A/D input)

93

OPERATION DIAL

I

Jog dial pulse input from OPERATION DIAL encoder

94

MASTER VOLUME

I

Jog dial pulse input from the VOLUME encoder 

95

EEPROM CLOCK

I/O

External EEPROM memory backup (Serial Clock line)

96

AVSS

I

Ground terminal (for A/D conversion)

97

EEPROM DATA

I/O

External EEPROM memory backup (Serial Data line)

98

VREF

I

A/D Converter reference voltage input terminal (+3.3V)

99

AVCC

–

Power supply terminal (+3.3V) (for A/D conversion)

100

METER-BLUE

O

LED drive signal output of Meter backlight LED

NOTE:
•   The mechanical parts with no reference 
   number in the exploded views are not 
 supplied.
•   Items marked “*” are not stocked since 
  they are seldom required for routine service. 
  Some delay should be anticipated 
  when ordering these items.
•   -XX and -X mean standardized parts, so 
  they may have some difference from the 
  original one.

•   Accessories are given in the last of this
  parts list.

•  Abbreviation
  E2  : 120V AC area in E model
  E3  : 240V AC area in E model
  E51  : Chilean and Peruvian model
  AR  : Argentina model
  AUS : Australian model
  MX  : Mexican model

  1   

3-363-099-32  SCREW (CASE 3 TP2)

  2   

3-363-099-02  SCREW (CASE 3 TP2)

  3   

4-126-672-01  HOLDER (TC) (GTR6B/GTR8B)

  4   

4-126-671-01  CASE,TOP (GTR6B/GTR8B)

  4   

4-132-615-01  CASE,TOP (GTR6/GTR7/GTR8)

  5   

4-126-663-11  PANEL, LOADING (GTR8)

  5   

4-126-663-01  PANEL, LOADING (GTR8B)

  5   

4-126-663-31  PANEL, LOADING (GTR7)

  5   

4-126-663-41  PANEL, LOADING (GTR6B)

  5   

4-126-663-51  PANEL, LOADING (GTR6)

  6   

1-840-020-11  MECHA DECK (GTR6B/ GTR8B)

  7   

4-126-673-01  PANEL, SIDE L (P)

  8 

4-126-674-01  PANEL, SIDE R (P)  

  9   

4-126-693-01    SPRING (TC) (GTR6B/GTR8B)

  10   

4-224-104-11  DAMPER (GTR6B/GTR8B)

  11   

4-231-824-01  CAM (A), HEART (GTR6B/GTR8B)

  12   

4-231-836-01  SPRING (HEART CAM-A) (GTR6B/GTR8B)

  13 

1-827-995-11  WIRE (FLAT TYPE) (7 CORE) (GTR6B/GTR8B)

  14 

1-827-720-11  WIRE (FLAT TYPE) (11 CORE)

  15 

1-829-023-11  WIRE (FLAT TYPE) (23 CORE)

  #1   

7-685-646-79  SCREW +BVTP 3X8 TYPE 2 IT-3

  #2 

7-685-871-01  SCREW +BVTT 3X6 (S)

Ref. No. 

Part No. 

Description 

Remark

Ref. No. 

Part No. 

Description 

Remark

#2

#2

#1

#1

#1

front panel section (1)

chassis section

not

supplied

#1

#1

#1

#1

a

(TC CASE TOP only for 

HCD-GTR6B/GTR8B)

not supplied

(Cover Dust Top)

not

supplied

a

The components identifi ed by
mark 0 or dotted line with mark 
0 are critical for safety.
Replace only with part number
specifi ed.

  52  

A-1702-138-A   MAIN BOARD, COMPLETE (GTR8B: E3)

  52 

A-1702-161-A  MAIN BOARD, COMPLETE (GTR8:E2)

  52  

A-1702-168-A   MAIN BOARD, COMPLETE (GTR6B: E3)

  52  

A-1724-710-A   MAIN BOARD, COMPLETE (GTR8: E51, AR)

  52  

A-1724-712-A   MAIN BOARD, COMPLETE (GTR8B: AUS)

  52  

A-1724-715-A   MAIN BOARD, COMPLETE (GTR8: MX)

  52  

A-1724-746-A   MAIN BOARD, COMPLETE (GTR7: E2)

  52  

A-1724-748-A  MAIN BOARD, COMPLETE (GTR7: E51, AR)

  52 

A-1724-750-A  MAIN BOARD, COMPLETE (GTR7: MX)

  52  

A-1724-752-A   MAIN BOARD, COMPLETE (GTR6: E2)

  52  

A-1724-754-A   MAIN BOARD, COMPLETE (GTR6B: AUS)

  52  

A-1724-757-A   MAIN BOARD, COMPLETE (GTR6: E51, AR)

  53 

1-828-938-51  WIRE (FLAT TYPE) (9 CORE)

  54 

1-828-975-11  WIRE (FLAT TYPE) (13 CORE)

  55 

1-828-384-11  WIRE (FLAT TYPE) (23 CORE)

  M891  

1-787-344-11   FAN, DC (GTR7/GTR8:MX/GTR6/GTR6B)

  M892  

1-787-344-11   FAN, DC (GTR7/GTR8/GTR8B)

  TU901  

1-693-778-21  TUNER (FM/AM) 

  #1  

7-685-646-79    SCREW +BVTP 3X8 TYPE 2 IT-3  

  #2  

4-900-386-01   SCREW +BVTT 4X8

  #3 

7-685-872-01  SCREW 3X6

  #4 

7-685-647-79  SCREW +BVTP 3X10 TYPE 2 IT-3

Ref. No. 

Part No. 

Description 

Remark

Ref. No. 

Part No. 

Description 

Remark

#1 #1

#1

#1

#2

#1

#3

#4

#1

#1

#1

TU901

M891

M892

53

54

52

For GTR6, GTR6B,

GTR7: MX,

GTR8: MX

use one cover and

one fan only

not supplied

(SUB TRANS Board)

not supplied

not

supplied

55

  101  

3-087-053-01   +BVTP2.6 (3CR) 

  102  

2-895-507-01   KNOB (MIC)

Ref. No. 

Part No. 

Description 

Remark

not supplied

(USB CD board)

not supplied

not supplied (HP board)

not supplied (MIC RV board)

front panel section (2)

not supplied

(MIC CD board)

not supplied