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SERVICE MANUAL ADDENDUM
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CONTENTS
OPERATIONAL DESCRIPTION……………………………..……………………………….page 3
SPECIFICATIONS……………………………………………………………………………..page 5
BALANCED ANALOGUE INTERFACE CIRCUIT…………………………………………..page 6
WORDCLOCK AND BALANCED DIGITAL INTERFACE CIRCUIT………..…………….page 7
830PLUS PCB LAYOUT……………………………………………………………….……page 8
IC DESCRIPTION………………………………………………………………………………page 9
CONNECTION & WIRING INFORMATION.………………………………………………. page 11
PARTS LIST…………………………………………………………………………………...page 14
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OPERATIONAL DESCRIPTION
Additional features of the CDR830 PLUS
- Word clock input
- Balanced digital input
- Balanced digital output
- Balanced analogue inputs with selectable line/microphone gain settings
- Balanced analogue outputs
- Parallel remote input
WORD CLOCK INPUT
In today’s digital studio environment, it is becoming more and more important to be able to
lock/synchronise all digital equipment to a common sampling frequency or house clock. The
effects of ‘unlocked’ equipment are all too noticeable as signal degradation, crackles and
pops as machines ‘clock’ at different rates.
The CDR830 PLUS automatically detects whether there is a valid word clock signal
connected to its word clock BNC input connector and if so, routes all digital outputs via a
sample rate converter that is ‘locked’ to the same sampling frequency as the word clock
input signal. If no valid word clock is detected at the input, then digital outputs will be
clocked out at the 830’s internal clock sampling frequency of 44.1khz.
Note: When locked to an external word clock source, the digital outputs do not transmit p/q subcode information.
BALANCED DIGITAL INPUT
The balanced digital input is compatible with both consumer and professional interface
protocols. It has the electrical characteristics of a professional balanced interface (110
ohm input impedance).
In order to select the balanced digital input as source, perform the following:
- Set the rear panel switch labelled SW2 to position 1. ‘BAL’
- Use the front panel INPUT SELECTOR to select COAXIAL.
BALANCED DIGITAL OUTPUT
The balanced digital output has the electrical characteristics of a professional balanced
interface, the format characteristics of a consumer interface and is always active.
BALANCED ANALOGUE INPUTS
It is possible to record balanced line or microphone level analogue inputs.
In order to select a line level balanced analogue input as source, set the rear panel switch
labelled SW1 to position 2. ‘BAL +4’. Use the front panel INPUT SELECTOR to select
ANALOG.
In order to select a mono or stereo microphone as source, set the rear panel switch
labelled SW1 to position 3. ‘BAL -60’. Use the front panel INPUT SELECTOR to select
ANALOG.
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BALANCED ANALOGUE OUTPUTS
The balanced analogue outputs have an output level of +18dBu for 0dBFS.
PARALLEL REMOTE INPUT (DIN 8 pin)
By connecting the circuit shown below, remote control operation of this unit is possible with
external switches. The parallel remote control has priority over the wireless remote control.
When the same buttons are pressed at the same time on both units, operation with the
parallel remote control will have priority.
REMOTE CONFIGURATION
>>
GROUND
FFWD
7
3
5
INPUT SELECTOR
PLAY / PAUSE
REW <<
6
8
2
1
4
AUTO / MANUAL
MONITOR
RECORD
STOP
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SPECIFICATIONS
Balanced Digital Output:
Impedance 110 ohm
Amplitude 4Vp-p 110 ohm load
Balanced Digital Input:
Impedance 110 ohm
Word Clock Input
Operating Frequency 32KHz to 48KHz
Balanced analogue inputs (LINE; +4)
Level required for 0dBFS (gain @max) +5dBu +/- 1dB
Frequency response 10hz to 20khz +/-1dB
THD+N <0.01%
Balanced analogue inputs (MIC; -60)
Level required for 0dBFS (gain @max) -57dBu +/- 1dB
Frequency response 20hz to 20khz +/-2dB
MIC EIN -119dB ‘A’ Weighted +/-1dB
THD+N <0.1%
Unbalanced analogue inputs (LINE; -8)
Level required for 0dBFS (gain @max) -8dBu +/- 1dB
Balanced analogue outputs 0dBFS gives +18dBu into a 10k load.
Unbalanced analogue outputs 0dBFS gives +8dBu into a 10k load.
NOTE: The specifications and design of this product are subject
to change without notice, due to improvements.
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BALANCED ANALOGUE INTERFACE CIRCUIT
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WORDCLOCK AND BALANCED DIGITAL INTERFACE CIRCUIT
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830PLUS PCB LAYOUT
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CS8420 – IC4
IC DESCRIPTION
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TC9246F – IC5
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830 PLUS PCB
830 PLUS PCB END CONNECTED TO:
CON3 CN801 (Audio pcb)
CON4 CN807 (Analogue record level pcb)
CON7 Pin1 C431 negative side (Audio pcb)
CON7 Pin2 C432 negative side (Audio pcb)
CON7 Pin3 W119 (GND) (Audio pcb)
CON7 Pin4 W120 (V+12) (Audio pcb)
CON7 Pin5 W121 (V-12) (Audio pcb)
CON8 Pin1 Pad vacated by R473 (CN401 end)
CON8 Pin2 Pad vacated by R473 (other end)
CON8 Pin3 W108 (JA603 end) (Audio pcb)
CON8 Pin4 W108 (C610 end) (Audio pcb)
CON8 Pin5 W127 via 22 ohm resistor. (Audio
CON8 Pin6 W122 (V+5A) (Audio pcb)
CON8 Pin7 W119 (GND) (Audio pcb)
CON8 Pin8 W101 (GND) (Audio pcb)
CONNECTION & WIRING INFORMATION
(see FIG 1 and FIG 2)
(Underside of Audio pcb)
(Underside of Audio pcb)
pcb)
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FIG.1
FIG.2
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PARALLEL REMOTE WIRING
Parallel Remote 8-pin DIN socket - REAR VIEW
COM
6
7
1
8
4
2
3
5
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PARTS LIST
COMPONENT NUMBER PART NUMBER
BALANCED ANALOGUE INTERFACE CIRCUIT
SEMICONDUCTORS
IC1, IC2, IC3 MC33079
CAPACITORS
C1, C2, C9, C10, C5, C6, C13, C14 SM1NF
C3, C4, C11, C12, C46, C47 NP10UF
C21, C22 P10UF
C7, C8, C15, C16 SM100PF
C17, C18, C19, C20 SM22PF
RESISTORS
R1, R4, R15, R18 SM1K2
R3, R17 SM330R
R2, R5, R16, R19 SM4K7
R6, R7, R13, R14, R20, R21, R27, R28 SM10K
R11, R12, R25, R26, R8, R9, R22, R23,
R30, R31, R32, R36, R37, R38
R29, R35 SM33K
R33, R34, R39, R40 SM33R
OTHER
SW1 SW1
CON3 CON3
CON4 CON4
CON7 CON7
CON1, CON2 XLR3-F
CON5, CON6 XLR3-M
WORDCLOCK AND BALANCED DIGITAL INTERFACE
SEMICONDUCTORS
IC4 CS8420
IC5 TC9246F
IC6 SN75LBC180
IC7, IC8 74HCT00
CAPACITORS
C29 SM33PF
SM47K
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C30 SM15PF
C31 SM10NF
C32, C33, C24, C25 SM220NF
C26 SM6N8F
C27 SM1N5F
C23, C34, C28, C37, C35, C48 SM100NF
C36, C49 P100UF
C42, C43, C44, C45 SM100PF
C38, C39, C40, C41 SM1UF
RESISTORS
R47, R52, R54, R55, R56 SM47R
R41, R43, R44, R45 SM47K
R42 SM1K8
R48 SM1K5
R49 SM220K
R50, R51 SM100R
R53 SM110R
OTHER
SW2 SW2
CON10 XLR3-F
CON11 XLR3-M
CON8 CON8
CON9 CON9
L1, L2 SM47UH
BNC BNC
8-PINDIN 8-PINDIN
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